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- /* Support for the generic parts of most COFF variants, for BFD.
- Copyright (C) 1990-2022 Free Software Foundation, Inc.
- Written by Cygnus Support.
- This file is part of BFD, the Binary File Descriptor library.
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
- MA 02110-1301, USA. */
- /* Most of this hacked by Steve Chamberlain,
- sac@cygnus.com. */
- /*
- SECTION
- coff backends
- BFD supports a number of different flavours of coff format.
- The major differences between formats are the sizes and
- alignments of fields in structures on disk, and the occasional
- extra field.
- Coff in all its varieties is implemented with a few common
- files and a number of implementation specific files. For
- example, the i386 coff format is implemented in the file
- @file{coff-i386.c}. This file @code{#include}s
- @file{coff/i386.h} which defines the external structure of the
- coff format for the i386, and @file{coff/internal.h} which
- defines the internal structure. @file{coff-i386.c} also
- defines the relocations used by the i386 coff format
- @xref{Relocations}.
- SUBSECTION
- Porting to a new version of coff
- The recommended method is to select from the existing
- implementations the version of coff which is most like the one
- you want to use. For example, we'll say that i386 coff is
- the one you select, and that your coff flavour is called foo.
- Copy @file{i386coff.c} to @file{foocoff.c}, copy
- @file{../include/coff/i386.h} to @file{../include/coff/foo.h},
- and add the lines to @file{targets.c} and @file{Makefile.in}
- so that your new back end is used. Alter the shapes of the
- structures in @file{../include/coff/foo.h} so that they match
- what you need. You will probably also have to add
- @code{#ifdef}s to the code in @file{coff/internal.h} and
- @file{coffcode.h} if your version of coff is too wild.
- You can verify that your new BFD backend works quite simply by
- building @file{objdump} from the @file{binutils} directory,
- and making sure that its version of what's going on and your
- host system's idea (assuming it has the pretty standard coff
- dump utility, usually called @code{att-dump} or just
- @code{dump}) are the same. Then clean up your code, and send
- what you've done to Cygnus. Then your stuff will be in the
- next release, and you won't have to keep integrating it.
- SUBSECTION
- How the coff backend works
- SUBSUBSECTION
- File layout
- The Coff backend is split into generic routines that are
- applicable to any Coff target and routines that are specific
- to a particular target. The target-specific routines are
- further split into ones which are basically the same for all
- Coff targets except that they use the external symbol format
- or use different values for certain constants.
- The generic routines are in @file{coffgen.c}. These routines
- work for any Coff target. They use some hooks into the target
- specific code; the hooks are in a @code{bfd_coff_backend_data}
- structure, one of which exists for each target.
- The essentially similar target-specific routines are in
- @file{coffcode.h}. This header file includes executable C code.
- The various Coff targets first include the appropriate Coff
- header file, make any special defines that are needed, and
- then include @file{coffcode.h}.
- Some of the Coff targets then also have additional routines in
- the target source file itself.
- SUBSUBSECTION
- Coff long section names
- In the standard Coff object format, section names are limited to
- the eight bytes available in the @code{s_name} field of the
- @code{SCNHDR} section header structure. The format requires the
- field to be NUL-padded, but not necessarily NUL-terminated, so
- the longest section names permitted are a full eight characters.
- The Microsoft PE variants of the Coff object file format add
- an extension to support the use of long section names. This
- extension is defined in section 4 of the Microsoft PE/COFF
- specification (rev 8.1). If a section name is too long to fit
- into the section header's @code{s_name} field, it is instead
- placed into the string table, and the @code{s_name} field is
- filled with a slash ("/") followed by the ASCII decimal
- representation of the offset of the full name relative to the
- string table base.
- Note that this implies that the extension can only be used in object
- files, as executables do not contain a string table. The standard
- specifies that long section names from objects emitted into executable
- images are to be truncated.
- However, as a GNU extension, BFD can generate executable images
- that contain a string table and long section names. This
- would appear to be technically valid, as the standard only says
- that Coff debugging information is deprecated, not forbidden,
- and in practice it works, although some tools that parse PE files
- expecting the MS standard format may become confused; @file{PEview} is
- one known example.
- The functionality is supported in BFD by code implemented under
- the control of the macro @code{COFF_LONG_SECTION_NAMES}. If not
- defined, the format does not support long section names in any way.
- If defined, it is used to initialise a flag,
- @code{_bfd_coff_long_section_names}, and a hook function pointer,
- @code{_bfd_coff_set_long_section_names}, in the Coff backend data
- structure. The flag controls the generation of long section names
- in output BFDs at runtime; if it is false, as it will be by default
- when generating an executable image, long section names are truncated;
- if true, the long section names extension is employed. The hook
- points to a function that allows the value of the flag to be altered
- at runtime, on formats that support long section names at all; on
- other formats it points to a stub that returns an error indication.
- With input BFDs, the flag is set according to whether any long section
- names are detected while reading the section headers. For a completely
- new BFD, the flag is set to the default for the target format. This
- information can be used by a client of the BFD library when deciding
- what output format to generate, and means that a BFD that is opened
- for read and subsequently converted to a writeable BFD and modified
- in-place will retain whatever format it had on input.
- If @code{COFF_LONG_SECTION_NAMES} is simply defined (blank), or is
- defined to the value "1", then long section names are enabled by
- default; if it is defined to the value zero, they are disabled by
- default (but still accepted in input BFDs). The header @file{coffcode.h}
- defines a macro, @code{COFF_DEFAULT_LONG_SECTION_NAMES}, which is
- used in the backends to initialise the backend data structure fields
- appropriately; see the comments for further detail.
- SUBSUBSECTION
- Bit twiddling
- Each flavour of coff supported in BFD has its own header file
- describing the external layout of the structures. There is also
- an internal description of the coff layout, in
- @file{coff/internal.h}. A major function of the
- coff backend is swapping the bytes and twiddling the bits to
- translate the external form of the structures into the normal
- internal form. This is all performed in the
- @code{bfd_swap}_@i{thing}_@i{direction} routines. Some
- elements are different sizes between different versions of
- coff; it is the duty of the coff version specific include file
- to override the definitions of various packing routines in
- @file{coffcode.h}. E.g., the size of line number entry in coff is
- sometimes 16 bits, and sometimes 32 bits. @code{#define}ing
- @code{PUT_LNSZ_LNNO} and @code{GET_LNSZ_LNNO} will select the
- correct one. No doubt, some day someone will find a version of
- coff which has a varying field size not catered to at the
- moment. To port BFD, that person will have to add more @code{#defines}.
- Three of the bit twiddling routines are exported to
- @code{gdb}; @code{coff_swap_aux_in}, @code{coff_swap_sym_in}
- and @code{coff_swap_lineno_in}. @code{GDB} reads the symbol
- table on its own, but uses BFD to fix things up. More of the
- bit twiddlers are exported for @code{gas};
- @code{coff_swap_aux_out}, @code{coff_swap_sym_out},
- @code{coff_swap_lineno_out}, @code{coff_swap_reloc_out},
- @code{coff_swap_filehdr_out}, @code{coff_swap_aouthdr_out},
- @code{coff_swap_scnhdr_out}. @code{Gas} currently keeps track
- of all the symbol table and reloc drudgery itself, thereby
- saving the internal BFD overhead, but uses BFD to swap things
- on the way out, making cross ports much safer. Doing so also
- allows BFD (and thus the linker) to use the same header files
- as @code{gas}, which makes one avenue to disaster disappear.
- SUBSUBSECTION
- Symbol reading
- The simple canonical form for symbols used by BFD is not rich
- enough to keep all the information available in a coff symbol
- table. The back end gets around this problem by keeping the original
- symbol table around, "behind the scenes".
- When a symbol table is requested (through a call to
- @code{bfd_canonicalize_symtab}), a request gets through to
- @code{coff_get_normalized_symtab}. This reads the symbol table from
- the coff file and swaps all the structures inside into the
- internal form. It also fixes up all the pointers in the table
- (represented in the file by offsets from the first symbol in
- the table) into physical pointers to elements in the new
- internal table. This involves some work since the meanings of
- fields change depending upon context: a field that is a
- pointer to another structure in the symbol table at one moment
- may be the size in bytes of a structure at the next. Another
- pass is made over the table. All symbols which mark file names
- (<<C_FILE>> symbols) are modified so that the internal
- string points to the value in the auxent (the real filename)
- rather than the normal text associated with the symbol
- (@code{".file"}).
- At this time the symbol names are moved around. Coff stores
- all symbols less than nine characters long physically
- within the symbol table; longer strings are kept at the end of
- the file in the string table. This pass moves all strings
- into memory and replaces them with pointers to the strings.
- The symbol table is massaged once again, this time to create
- the canonical table used by the BFD application. Each symbol
- is inspected in turn, and a decision made (using the
- @code{sclass} field) about the various flags to set in the
- @code{asymbol}. @xref{Symbols}. The generated canonical table
- shares strings with the hidden internal symbol table.
- Any linenumbers are read from the coff file too, and attached
- to the symbols which own the functions the linenumbers belong to.
- SUBSUBSECTION
- Symbol writing
- Writing a symbol to a coff file which didn't come from a coff
- file will lose any debugging information. The @code{asymbol}
- structure remembers the BFD from which the symbol was taken, and on
- output the back end makes sure that the same destination target as
- source target is present.
- When the symbols have come from a coff file then all the
- debugging information is preserved.
- Symbol tables are provided for writing to the back end in a
- vector of pointers to pointers. This allows applications like
- the linker to accumulate and output large symbol tables
- without having to do too much byte copying.
- This function runs through the provided symbol table and
- patches each symbol marked as a file place holder
- (@code{C_FILE}) to point to the next file place holder in the
- list. It also marks each @code{offset} field in the list with
- the offset from the first symbol of the current symbol.
- Another function of this procedure is to turn the canonical
- value form of BFD into the form used by coff. Internally, BFD
- expects symbol values to be offsets from a section base; so a
- symbol physically at 0x120, but in a section starting at
- 0x100, would have the value 0x20. Coff expects symbols to
- contain their final value, so symbols have their values
- changed at this point to reflect their sum with their owning
- section. This transformation uses the
- <<output_section>> field of the @code{asymbol}'s
- @code{asection} @xref{Sections}.
- o <<coff_mangle_symbols>>
- This routine runs though the provided symbol table and uses
- the offsets generated by the previous pass and the pointers
- generated when the symbol table was read in to create the
- structured hierarchy required by coff. It changes each pointer
- to a symbol into the index into the symbol table of the asymbol.
- o <<coff_write_symbols>>
- This routine runs through the symbol table and patches up the
- symbols from their internal form into the coff way, calls the
- bit twiddlers, and writes out the table to the file.
- */
- /*
- INTERNAL_DEFINITION
- coff_symbol_type
- DESCRIPTION
- The hidden information for an <<asymbol>> is described in a
- <<combined_entry_type>>:
- CODE_FRAGMENT
- .
- .typedef struct coff_ptr_struct
- .{
- . {* Remembers the offset from the first symbol in the file for
- . this symbol. Generated by coff_renumber_symbols. *}
- . unsigned int offset;
- .
- . {* Should the value of this symbol be renumbered. Used for
- . XCOFF C_BSTAT symbols. Set by coff_slurp_symbol_table. *}
- . unsigned int fix_value : 1;
- .
- . {* Should the tag field of this symbol be renumbered.
- . Created by coff_pointerize_aux. *}
- . unsigned int fix_tag : 1;
- .
- . {* Should the endidx field of this symbol be renumbered.
- . Created by coff_pointerize_aux. *}
- . unsigned int fix_end : 1;
- .
- . {* Should the x_csect.x_scnlen field be renumbered.
- . Created by coff_pointerize_aux. *}
- . unsigned int fix_scnlen : 1;
- .
- . {* Fix up an XCOFF C_BINCL/C_EINCL symbol. The value is the
- . index into the line number entries. Set by coff_slurp_symbol_table. *}
- . unsigned int fix_line : 1;
- .
- . {* The container for the symbol structure as read and translated
- . from the file. *}
- . union
- . {
- . union internal_auxent auxent;
- . struct internal_syment syment;
- . } u;
- .
- . {* Selector for the union above. *}
- . bool is_sym;
- .
- . {* An extra pointer which can used by format based on COFF (like XCOFF)
- . to provide extra information to their backend. *}
- . void *extrap;
- .} combined_entry_type;
- .
- .
- .{* Each canonical asymbol really looks like this: *}
- .
- .typedef struct coff_symbol_struct
- .{
- . {* The actual symbol which the rest of BFD works with *}
- . asymbol symbol;
- .
- . {* A pointer to the hidden information for this symbol *}
- . combined_entry_type *native;
- .
- . {* A pointer to the linenumber information for this symbol *}
- . struct lineno_cache_entry *lineno;
- .
- . {* Have the line numbers been relocated yet ? *}
- . bool done_lineno;
- .} coff_symbol_type;
- */
- #include "libiberty.h"
- #ifdef COFF_WITH_PE
- #include "peicode.h"
- #else
- #include "coffswap.h"
- #endif
- #define STRING_SIZE_SIZE 4
- #define DOT_DEBUG ".debug"
- #define DOT_ZDEBUG ".zdebug"
- #define GNU_LINKONCE_WI ".gnu.linkonce.wi."
- #define GNU_LINKONCE_WT ".gnu.linkonce.wt."
- #define DOT_RELOC ".reloc"
- #if defined(COFF_WITH_PE) || defined(COFF_GO32_EXE) || defined(COFF_GO32)
- # define COFF_WITH_EXTENDED_RELOC_COUNTER
- #endif
- #if defined (COFF_LONG_SECTION_NAMES)
- /* Needed to expand the inputs to BLANKOR1TOODD. */
- #define COFFLONGSECTIONCATHELPER(x,y) x ## y
- /* If the input macro Y is blank or '1', return an odd number; if it is
- '0', return an even number. Result undefined in all other cases. */
- #define BLANKOR1TOODD(y) COFFLONGSECTIONCATHELPER(1,y)
- /* Defined to numerical 0 or 1 according to whether generation of long
- section names is disabled or enabled by default. */
- #define COFF_ENABLE_LONG_SECTION_NAMES (BLANKOR1TOODD(COFF_LONG_SECTION_NAMES) & 1)
- /* Where long section names are supported, we allow them to be enabled
- and disabled at runtime, so select an appropriate hook function for
- _bfd_coff_set_long_section_names. */
- #define COFF_LONG_SECTION_NAMES_SETTER bfd_coff_set_long_section_names_allowed
- #else /* !defined (COFF_LONG_SECTION_NAMES) */
- /* If long section names are not supported, this stub disallows any
- attempt to enable them at run-time. */
- #define COFF_LONG_SECTION_NAMES_SETTER bfd_coff_set_long_section_names_disallowed
- #endif /* defined (COFF_LONG_SECTION_NAMES) */
- /* Define a macro that can be used to initialise both the fields relating
- to long section names in the backend data struct simultaneously. */
- #if COFF_ENABLE_LONG_SECTION_NAMES
- #define COFF_DEFAULT_LONG_SECTION_NAMES (true), COFF_LONG_SECTION_NAMES_SETTER
- #else /* !COFF_ENABLE_LONG_SECTION_NAMES */
- #define COFF_DEFAULT_LONG_SECTION_NAMES (false), COFF_LONG_SECTION_NAMES_SETTER
- #endif /* COFF_ENABLE_LONG_SECTION_NAMES */
- #if defined (COFF_LONG_SECTION_NAMES)
- static bool bfd_coff_set_long_section_names_allowed
- (bfd *, int);
- #else /* !defined (COFF_LONG_SECTION_NAMES) */
- static bool bfd_coff_set_long_section_names_disallowed
- (bfd *, int);
- #endif /* defined (COFF_LONG_SECTION_NAMES) */
- static long sec_to_styp_flags
- (const char *, flagword);
- static bool styp_to_sec_flags
- (bfd *, void *, const char *, asection *, flagword *);
- static bool coff_bad_format_hook
- (bfd *, void *);
- static void coff_set_custom_section_alignment
- (bfd *, asection *, const struct coff_section_alignment_entry *,
- const unsigned int);
- static bool coff_new_section_hook
- (bfd *, asection *);
- static bool coff_set_arch_mach_hook
- (bfd *, void *);
- static bool coff_write_relocs
- (bfd *, int);
- static bool coff_set_flags
- (bfd *, unsigned int *, unsigned short *);
- static bool coff_set_arch_mach
- (bfd *, enum bfd_architecture, unsigned long) ATTRIBUTE_UNUSED;
- static bool coff_compute_section_file_positions
- (bfd *);
- static bool coff_write_object_contents
- (bfd *) ATTRIBUTE_UNUSED;
- static bool coff_set_section_contents
- (bfd *, asection *, const void *, file_ptr, bfd_size_type);
- static bool coff_slurp_line_table
- (bfd *, asection *);
- static bool coff_slurp_symbol_table
- (bfd *);
- static enum coff_symbol_classification coff_classify_symbol
- (bfd *, struct internal_syment *);
- static bool coff_slurp_reloc_table
- (bfd *, asection *, asymbol **);
- static long coff_canonicalize_reloc
- (bfd *, asection *, arelent **, asymbol **);
- #ifndef coff_mkobject_hook
- static void * coff_mkobject_hook
- (bfd *, void *, void *);
- #endif
- #ifdef COFF_WITH_PE
- static flagword handle_COMDAT
- (bfd *, flagword, void *, const char *, asection *);
- #endif
- #ifdef TICOFF
- static bool ticoff0_bad_format_hook
- (bfd *, void * );
- static bool ticoff1_bad_format_hook
- (bfd *, void * );
- #endif
- /* void warning(); */
- #if defined (COFF_LONG_SECTION_NAMES)
- static bool
- bfd_coff_set_long_section_names_allowed (bfd *abfd, int enable)
- {
- coff_backend_info (abfd)->_bfd_coff_long_section_names = enable;
- return true;
- }
- #else /* !defined (COFF_LONG_SECTION_NAMES) */
- static bool
- bfd_coff_set_long_section_names_disallowed (bfd *abfd, int enable)
- {
- (void) abfd;
- (void) enable;
- return false;
- }
- #endif /* defined (COFF_LONG_SECTION_NAMES) */
- /* Return a word with STYP_* (scnhdr.s_flags) flags set to represent
- the incoming SEC_* flags. The inverse of this function is
- styp_to_sec_flags(). NOTE: If you add to/change this routine, you
- should probably mirror the changes in styp_to_sec_flags(). */
- #ifndef COFF_WITH_PE
- /* Macros for setting debugging flags. */
- #ifdef STYP_DEBUG
- #define STYP_XCOFF_DEBUG STYP_DEBUG
- #else
- #define STYP_XCOFF_DEBUG STYP_INFO
- #endif
- #ifdef COFF_ALIGN_IN_S_FLAGS
- #define STYP_DEBUG_INFO STYP_DSECT
- #else
- #define STYP_DEBUG_INFO STYP_INFO
- #endif
- static long
- sec_to_styp_flags (const char *sec_name, flagword sec_flags)
- {
- long styp_flags = 0;
- if (!strcmp (sec_name, _TEXT))
- {
- styp_flags = STYP_TEXT;
- }
- else if (!strcmp (sec_name, _DATA))
- {
- styp_flags = STYP_DATA;
- }
- else if (!strcmp (sec_name, _BSS))
- {
- styp_flags = STYP_BSS;
- #ifdef _COMMENT
- }
- else if (!strcmp (sec_name, _COMMENT))
- {
- styp_flags = STYP_INFO;
- #endif /* _COMMENT */
- #ifdef _LIB
- }
- else if (!strcmp (sec_name, _LIB))
- {
- styp_flags = STYP_LIB;
- #endif /* _LIB */
- #ifdef _LIT
- }
- else if (!strcmp (sec_name, _LIT))
- {
- styp_flags = STYP_LIT;
- #endif /* _LIT */
- }
- else if (startswith (sec_name, DOT_DEBUG)
- || startswith (sec_name, DOT_ZDEBUG))
- {
- /* Handle the XCOFF debug section and DWARF2 debug sections. */
- if (!sec_name[6])
- styp_flags = STYP_XCOFF_DEBUG;
- else
- styp_flags = STYP_DEBUG_INFO;
- }
- else if (startswith (sec_name, ".stab"))
- {
- styp_flags = STYP_DEBUG_INFO;
- }
- #ifdef COFF_LONG_SECTION_NAMES
- else if (startswith (sec_name, GNU_LINKONCE_WI)
- || startswith (sec_name, GNU_LINKONCE_WT))
- {
- styp_flags = STYP_DEBUG_INFO;
- }
- #endif
- #ifdef RS6000COFF_C
- else if (!strcmp (sec_name, _TDATA))
- {
- styp_flags = STYP_TDATA;
- }
- else if (!strcmp (sec_name, _TBSS))
- {
- styp_flags = STYP_TBSS;
- }
- else if (!strcmp (sec_name, _PAD))
- {
- styp_flags = STYP_PAD;
- }
- else if (!strcmp (sec_name, _LOADER))
- {
- styp_flags = STYP_LOADER;
- }
- else if (!strcmp (sec_name, _EXCEPT))
- {
- styp_flags = STYP_EXCEPT;
- }
- else if (!strcmp (sec_name, _TYPCHK))
- {
- styp_flags = STYP_TYPCHK;
- }
- else if (sec_flags & SEC_DEBUGGING)
- {
- int i;
- for (i = 0; i < XCOFF_DWSECT_NBR_NAMES; i++)
- if (!strcmp (sec_name, xcoff_dwsect_names[i].xcoff_name))
- {
- styp_flags = STYP_DWARF | xcoff_dwsect_names[i].flag;
- break;
- }
- }
- #endif
- /* Try and figure out what it should be */
- else if (sec_flags & SEC_CODE)
- {
- styp_flags = STYP_TEXT;
- }
- else if (sec_flags & SEC_DATA)
- {
- styp_flags = STYP_DATA;
- }
- else if (sec_flags & SEC_READONLY)
- {
- #ifdef STYP_LIT /* 29k readonly text/data section */
- styp_flags = STYP_LIT;
- #else
- styp_flags = STYP_TEXT;
- #endif /* STYP_LIT */
- }
- else if (sec_flags & SEC_LOAD)
- {
- styp_flags = STYP_TEXT;
- }
- else if (sec_flags & SEC_ALLOC)
- {
- styp_flags = STYP_BSS;
- }
- #ifdef STYP_CLINK
- if (sec_flags & SEC_TIC54X_CLINK)
- styp_flags |= STYP_CLINK;
- #endif
- #ifdef STYP_BLOCK
- if (sec_flags & SEC_TIC54X_BLOCK)
- styp_flags |= STYP_BLOCK;
- #endif
- #ifdef STYP_NOLOAD
- if ((sec_flags & (SEC_NEVER_LOAD | SEC_COFF_SHARED_LIBRARY)) != 0)
- styp_flags |= STYP_NOLOAD;
- #endif
- return styp_flags;
- }
- #else /* COFF_WITH_PE */
- /* The PE version; see above for the general comments. The non-PE
- case seems to be more guessing, and breaks PE format; specifically,
- .rdata is readonly, but it sure ain't text. Really, all this
- should be set up properly in gas (or whatever assembler is in use),
- and honor whatever objcopy/strip, etc. sent us as input. */
- static long
- sec_to_styp_flags (const char *sec_name, flagword sec_flags)
- {
- long styp_flags = 0;
- bool is_dbg = false;
- if (startswith (sec_name, DOT_DEBUG)
- || startswith (sec_name, DOT_ZDEBUG)
- #ifdef COFF_LONG_SECTION_NAMES
- || startswith (sec_name, GNU_LINKONCE_WI)
- || startswith (sec_name, GNU_LINKONCE_WT)
- #endif
- || startswith (sec_name, ".stab"))
- is_dbg = true;
- /* caution: there are at least three groups of symbols that have
- very similar bits and meanings: IMAGE_SCN*, SEC_*, and STYP_*.
- SEC_* are the BFD internal flags, used for generic BFD
- information. STYP_* are the COFF section flags which appear in
- COFF files. IMAGE_SCN_* are the PE section flags which appear in
- PE files. The STYP_* flags and the IMAGE_SCN_* flags overlap,
- but there are more IMAGE_SCN_* flags. */
- /* FIXME: There is no gas syntax to specify the debug section flag. */
- if (is_dbg)
- {
- sec_flags &= (SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD
- | SEC_LINK_DUPLICATES_SAME_CONTENTS
- | SEC_LINK_DUPLICATES_SAME_SIZE);
- sec_flags |= SEC_DEBUGGING | SEC_READONLY;
- }
- /* skip LOAD */
- /* READONLY later */
- /* skip RELOC */
- if ((sec_flags & SEC_CODE) != 0)
- styp_flags |= IMAGE_SCN_CNT_CODE;
- if ((sec_flags & (SEC_DATA | SEC_DEBUGGING)) != 0)
- styp_flags |= IMAGE_SCN_CNT_INITIALIZED_DATA;
- if ((sec_flags & SEC_ALLOC) != 0 && (sec_flags & SEC_LOAD) == 0)
- styp_flags |= IMAGE_SCN_CNT_UNINITIALIZED_DATA; /* ==STYP_BSS */
- /* skip ROM */
- /* skip constRUCTOR */
- /* skip CONTENTS */
- #ifndef COFF_IMAGE_WITH_PE
- /* I don't think any of the IMAGE_SCN_LNK_* flags set below should be set
- when the output is PE. Only object files should have them, for the linker
- to consume. */
- if ((sec_flags & SEC_IS_COMMON) != 0)
- styp_flags |= IMAGE_SCN_LNK_COMDAT;
- #endif
- if ((sec_flags & SEC_DEBUGGING) != 0)
- styp_flags |= IMAGE_SCN_MEM_DISCARDABLE;
- if ((sec_flags & (SEC_EXCLUDE | SEC_NEVER_LOAD)) != 0 && !is_dbg)
- #ifdef COFF_IMAGE_WITH_PE
- styp_flags |= IMAGE_SCN_MEM_DISCARDABLE;
- #else
- styp_flags |= IMAGE_SCN_LNK_REMOVE;
- #endif
- /* skip IN_MEMORY */
- /* skip SORT */
- #ifndef COFF_IMAGE_WITH_PE
- if (sec_flags & SEC_LINK_ONCE)
- styp_flags |= IMAGE_SCN_LNK_COMDAT;
- if ((sec_flags
- & (SEC_LINK_DUPLICATES_DISCARD | SEC_LINK_DUPLICATES_SAME_CONTENTS
- | SEC_LINK_DUPLICATES_SAME_SIZE)) != 0)
- styp_flags |= IMAGE_SCN_LNK_COMDAT;
- #endif
- /* skip LINKER_CREATED */
- if ((sec_flags & SEC_COFF_NOREAD) == 0)
- styp_flags |= IMAGE_SCN_MEM_READ; /* Invert NOREAD for read. */
- if ((sec_flags & SEC_READONLY) == 0)
- styp_flags |= IMAGE_SCN_MEM_WRITE; /* Invert READONLY for write. */
- if (sec_flags & SEC_CODE)
- styp_flags |= IMAGE_SCN_MEM_EXECUTE; /* CODE->EXECUTE. */
- if (sec_flags & SEC_COFF_SHARED)
- styp_flags |= IMAGE_SCN_MEM_SHARED; /* Shared remains meaningful. */
- return styp_flags;
- }
- #endif /* COFF_WITH_PE */
- /* Return a word with SEC_* flags set to represent the incoming STYP_*
- flags (from scnhdr.s_flags). The inverse of this function is
- sec_to_styp_flags(). NOTE: If you add to/change this routine, you
- should probably mirror the changes in sec_to_styp_flags(). */
- #ifndef COFF_WITH_PE
- static bool
- styp_to_sec_flags (bfd *abfd,
- void * hdr,
- const char *name,
- asection *section ATTRIBUTE_UNUSED,
- flagword *flags_ptr)
- {
- struct internal_scnhdr *internal_s = (struct internal_scnhdr *) hdr;
- unsigned long styp_flags = internal_s->s_flags;
- flagword sec_flags = 0;
- #ifdef STYP_BLOCK
- if (styp_flags & STYP_BLOCK)
- sec_flags |= SEC_TIC54X_BLOCK;
- #endif
- #ifdef STYP_CLINK
- if (styp_flags & STYP_CLINK)
- sec_flags |= SEC_TIC54X_CLINK;
- #endif
- #ifdef STYP_NOLOAD
- if (styp_flags & STYP_NOLOAD)
- sec_flags |= SEC_NEVER_LOAD;
- #endif /* STYP_NOLOAD */
- /* For 386 COFF, at least, an unloadable text or data section is
- actually a shared library section. */
- if (styp_flags & STYP_TEXT)
- {
- if (sec_flags & SEC_NEVER_LOAD)
- sec_flags |= SEC_CODE | SEC_COFF_SHARED_LIBRARY;
- else
- sec_flags |= SEC_CODE | SEC_LOAD | SEC_ALLOC;
- }
- else if (styp_flags & STYP_DATA)
- {
- if (sec_flags & SEC_NEVER_LOAD)
- sec_flags |= SEC_DATA | SEC_COFF_SHARED_LIBRARY;
- else
- sec_flags |= SEC_DATA | SEC_LOAD | SEC_ALLOC;
- }
- else if (styp_flags & STYP_BSS)
- {
- #ifdef BSS_NOLOAD_IS_SHARED_LIBRARY
- if (sec_flags & SEC_NEVER_LOAD)
- sec_flags |= SEC_ALLOC | SEC_COFF_SHARED_LIBRARY;
- else
- #endif
- sec_flags |= SEC_ALLOC;
- }
- else if (styp_flags & STYP_INFO)
- {
- /* We mark these as SEC_DEBUGGING, but only if COFF_PAGE_SIZE is
- defined. coff_compute_section_file_positions uses
- COFF_PAGE_SIZE to ensure that the low order bits of the
- section VMA and the file offset match. If we don't know
- COFF_PAGE_SIZE, we can't ensure the correct correspondence,
- and demand page loading of the file will fail. */
- #if defined (COFF_PAGE_SIZE) && !defined (COFF_ALIGN_IN_S_FLAGS)
- sec_flags |= SEC_DEBUGGING;
- #endif
- }
- else if (styp_flags & STYP_PAD)
- sec_flags = 0;
- #ifdef RS6000COFF_C
- else if (styp_flags & STYP_TDATA)
- {
- if (sec_flags & SEC_NEVER_LOAD)
- sec_flags |= SEC_DATA | SEC_THREAD_LOCAL | SEC_COFF_SHARED_LIBRARY;
- else
- sec_flags |= SEC_DATA | SEC_THREAD_LOCAL | SEC_LOAD | SEC_ALLOC;
- }
- else if (styp_flags & STYP_TBSS)
- {
- #ifdef BSS_NOLOAD_IS_SHARED_LIBRARY
- if (sec_flags & SEC_NEVER_LOAD)
- sec_flags |= SEC_ALLOC | SEC_THREAD_LOCAL | SEC_COFF_SHARED_LIBRARY;
- else
- #endif
- sec_flags |= SEC_ALLOC | SEC_THREAD_LOCAL;
- }
- else if (styp_flags & STYP_EXCEPT)
- sec_flags |= SEC_LOAD;
- else if (styp_flags & STYP_LOADER)
- sec_flags |= SEC_LOAD;
- else if (styp_flags & STYP_TYPCHK)
- sec_flags |= SEC_LOAD;
- else if (styp_flags & STYP_DWARF)
- sec_flags |= SEC_DEBUGGING;
- #endif
- else if (strcmp (name, _TEXT) == 0)
- {
- if (sec_flags & SEC_NEVER_LOAD)
- sec_flags |= SEC_CODE | SEC_COFF_SHARED_LIBRARY;
- else
- sec_flags |= SEC_CODE | SEC_LOAD | SEC_ALLOC;
- }
- else if (strcmp (name, _DATA) == 0)
- {
- if (sec_flags & SEC_NEVER_LOAD)
- sec_flags |= SEC_DATA | SEC_COFF_SHARED_LIBRARY;
- else
- sec_flags |= SEC_DATA | SEC_LOAD | SEC_ALLOC;
- }
- else if (strcmp (name, _BSS) == 0)
- {
- #ifdef BSS_NOLOAD_IS_SHARED_LIBRARY
- if (sec_flags & SEC_NEVER_LOAD)
- sec_flags |= SEC_ALLOC | SEC_COFF_SHARED_LIBRARY;
- else
- #endif
- sec_flags |= SEC_ALLOC;
- }
- else if (startswith (name, DOT_DEBUG)
- || startswith (name, DOT_ZDEBUG)
- #ifdef _COMMENT
- || strcmp (name, _COMMENT) == 0
- #endif
- #ifdef COFF_LONG_SECTION_NAMES
- || startswith (name, GNU_LINKONCE_WI)
- || startswith (name, GNU_LINKONCE_WT)
- #endif
- || startswith (name, ".stab"))
- {
- #ifdef COFF_PAGE_SIZE
- sec_flags |= SEC_DEBUGGING;
- #endif
- }
- #ifdef _LIB
- else if (strcmp (name, _LIB) == 0)
- ;
- #endif
- #ifdef _LIT
- else if (strcmp (name, _LIT) == 0)
- sec_flags = SEC_LOAD | SEC_ALLOC | SEC_READONLY;
- #endif
- else
- sec_flags |= SEC_ALLOC | SEC_LOAD;
- #ifdef STYP_LIT /* A29k readonly text/data section type. */
- if ((styp_flags & STYP_LIT) == STYP_LIT)
- sec_flags = (SEC_LOAD | SEC_ALLOC | SEC_READONLY);
- #endif /* STYP_LIT */
- #ifdef STYP_OTHER_LOAD /* Other loaded sections. */
- if (styp_flags & STYP_OTHER_LOAD)
- sec_flags = (SEC_LOAD | SEC_ALLOC);
- #endif /* STYP_SDATA */
- if ((bfd_applicable_section_flags (abfd) & SEC_SMALL_DATA) != 0
- && (startswith (name, ".sbss")
- || startswith (name, ".sdata")))
- sec_flags |= SEC_SMALL_DATA;
- #if defined (COFF_LONG_SECTION_NAMES) && defined (COFF_SUPPORT_GNU_LINKONCE)
- /* As a GNU extension, if the name begins with .gnu.linkonce, we
- only link a single copy of the section. This is used to support
- g++. g++ will emit each template expansion in its own section.
- The symbols will be defined as weak, so that multiple definitions
- are permitted. The GNU linker extension is to actually discard
- all but one of the sections. */
- if (startswith (name, ".gnu.linkonce"))
- sec_flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
- #endif
- if (flags_ptr == NULL)
- return false;
- * flags_ptr = sec_flags;
- return true;
- }
- #else /* COFF_WITH_PE */
- static flagword
- handle_COMDAT (bfd * abfd,
- flagword sec_flags,
- void * hdr,
- const char *name,
- asection *section)
- {
- struct internal_scnhdr *internal_s = (struct internal_scnhdr *) hdr;
- bfd_byte *esymstart, *esym, *esymend;
- int seen_state = 0;
- char *target_name = NULL;
- sec_flags |= SEC_LINK_ONCE;
- /* Unfortunately, the PE format stores essential information in
- the symbol table, of all places. We need to extract that
- information now, so that objdump and the linker will know how
- to handle the section without worrying about the symbols. We
- can't call slurp_symtab, because the linker doesn't want the
- swapped symbols. */
- /* COMDAT sections are special. The first symbol is the section
- symbol, which tells what kind of COMDAT section it is. The
- second symbol is the "comdat symbol" - the one with the
- unique name. GNU uses the section symbol for the unique
- name; MS uses ".text" for every comdat section. Sigh. - DJ */
- /* This is not mirrored in sec_to_styp_flags(), but there
- doesn't seem to be a need to, either, and it would at best be
- rather messy. */
- if (! _bfd_coff_get_external_symbols (abfd))
- return sec_flags;
- esymstart = esym = (bfd_byte *) obj_coff_external_syms (abfd);
- esymend = esym + obj_raw_syment_count (abfd) * bfd_coff_symesz (abfd);
- while (esym < esymend)
- {
- struct internal_syment isym;
- char buf[SYMNMLEN + 1];
- const char *symname;
- bfd_coff_swap_sym_in (abfd, esym, & isym);
- BFD_ASSERT (sizeof (internal_s->s_name) <= SYMNMLEN);
- if (isym.n_scnum == section->target_index)
- {
- /* According to the MSVC documentation, the first
- TWO entries with the section # are both of
- interest to us. The first one is the "section
- symbol" (section name). The second is the comdat
- symbol name. Here, we've found the first
- qualifying entry; we distinguish it from the
- second with a state flag.
- In the case of gas-generated (at least until that
- is fixed) .o files, it isn't necessarily the
- second one. It may be some other later symbol.
- Since gas also doesn't follow MS conventions and
- emits the section similar to .text$<name>, where
- <something> is the name we're looking for, we
- distinguish the two as follows:
- If the section name is simply a section name (no
- $) we presume it's MS-generated, and look at
- precisely the second symbol for the comdat name.
- If the section name has a $, we assume it's
- gas-generated, and look for <something> (whatever
- follows the $) as the comdat symbol. */
- /* All 3 branches use this. */
- symname = _bfd_coff_internal_syment_name (abfd, &isym, buf);
- /* PR 17512 file: 078-11867-0.004 */
- if (symname == NULL)
- {
- _bfd_error_handler (_("%pB: unable to load COMDAT section name"),
- abfd);
- break;
- }
- switch (seen_state)
- {
- case 0:
- {
- /* The first time we've seen the symbol. */
- union internal_auxent aux;
- /* If it isn't the stuff we're expecting, die;
- The MS documentation is vague, but it
- appears that the second entry serves BOTH
- as the comdat symbol and the defining
- symbol record (either C_STAT or C_EXT,
- possibly with an aux entry with debug
- information if it's a function.) It
- appears the only way to find the second one
- is to count. (On Intel, they appear to be
- adjacent, but on Alpha, they have been
- found separated.)
- Here, we think we've found the first one,
- but there's some checking we can do to be
- sure. */
- if (! ((isym.n_sclass == C_STAT
- || isym.n_sclass == C_EXT)
- && BTYPE (isym.n_type) == T_NULL
- && isym.n_value == 0))
- {
- /* Malformed input files can trigger this test.
- cf PR 21781. */
- _bfd_error_handler (_("%pB: error: unexpected symbol '%s' in COMDAT section"),
- abfd, symname);
- goto breakloop;
- }
- /* FIXME LATER: MSVC generates section names
- like .text for comdats. Gas generates
- names like .text$foo__Fv (in the case of a
- function). See comment above for more. */
- if (isym.n_sclass == C_STAT && strcmp (name, symname) != 0)
- /* xgettext:c-format */
- _bfd_error_handler (_("%pB: warning: COMDAT symbol '%s'"
- " does not match section name '%s'"),
- abfd, symname, name);
- seen_state = 1;
- /* PR 17512: file: e2cfe54f. */
- if (esym + bfd_coff_symesz (abfd) >= esymend)
- {
- /* xgettext:c-format */
- _bfd_error_handler (_("%pB: warning: no symbol for"
- " section '%s' found"),
- abfd, symname);
- break;
- }
- /* This is the section symbol. */
- bfd_coff_swap_aux_in (abfd, (esym + bfd_coff_symesz (abfd)),
- isym.n_type, isym.n_sclass,
- 0, isym.n_numaux, & aux);
- target_name = strchr (name, '$');
- if (target_name != NULL)
- {
- /* Gas mode. */
- seen_state = 2;
- /* Skip the `$'. */
- target_name += 1;
- }
- /* FIXME: Microsoft uses NODUPLICATES and
- ASSOCIATIVE, but gnu uses ANY and
- SAME_SIZE. Unfortunately, gnu doesn't do
- the comdat symbols right. So, until we can
- fix it to do the right thing, we are
- temporarily disabling comdats for the MS
- types (they're used in DLLs and C++, but we
- don't support *their* C++ libraries anyway
- - DJ. */
- /* Cygwin does not follow the MS style, and
- uses ANY and SAME_SIZE where NODUPLICATES
- and ASSOCIATIVE should be used. For
- Interix, we just do the right thing up
- front. */
- switch (aux.x_scn.x_comdat)
- {
- case IMAGE_COMDAT_SELECT_NODUPLICATES:
- #ifdef STRICT_PE_FORMAT
- sec_flags |= SEC_LINK_DUPLICATES_ONE_ONLY;
- #else
- sec_flags &= ~SEC_LINK_ONCE;
- #endif
- break;
- case IMAGE_COMDAT_SELECT_ANY:
- sec_flags |= SEC_LINK_DUPLICATES_DISCARD;
- break;
- case IMAGE_COMDAT_SELECT_SAME_SIZE:
- sec_flags |= SEC_LINK_DUPLICATES_SAME_SIZE;
- break;
- case IMAGE_COMDAT_SELECT_EXACT_MATCH:
- /* Not yet fully implemented ??? */
- sec_flags |= SEC_LINK_DUPLICATES_SAME_CONTENTS;
- break;
- /* debug$S gets this case; other
- implications ??? */
- /* There may be no symbol... we'll search
- the whole table... Is this the right
- place to play this game? Or should we do
- it when reading it in. */
- case IMAGE_COMDAT_SELECT_ASSOCIATIVE:
- #ifdef STRICT_PE_FORMAT
- /* FIXME: This is not currently implemented. */
- sec_flags |= SEC_LINK_DUPLICATES_DISCARD;
- #else
- sec_flags &= ~SEC_LINK_ONCE;
- #endif
- break;
- default: /* 0 means "no symbol" */
- /* debug$F gets this case; other
- implications ??? */
- sec_flags |= SEC_LINK_DUPLICATES_DISCARD;
- break;
- }
- }
- break;
- case 2:
- /* Gas mode: the first matching on partial name. */
- #ifndef TARGET_UNDERSCORE
- #define TARGET_UNDERSCORE 0
- #endif
- /* Is this the name we're looking for ? */
- if (strcmp (target_name,
- symname + (TARGET_UNDERSCORE ? 1 : 0)) != 0)
- {
- /* Not the name we're looking for */
- esym += (isym.n_numaux + 1) * bfd_coff_symesz (abfd);
- continue;
- }
- /* Fall through. */
- case 1:
- /* MSVC mode: the lexically second symbol (or
- drop through from the above). */
- {
- char *newname;
- size_t amt;
- /* This must the second symbol with the
- section #. It is the actual symbol name.
- Intel puts the two adjacent, but Alpha (at
- least) spreads them out. */
- amt = sizeof (struct coff_comdat_info);
- coff_section_data (abfd, section)->comdat
- = (struct coff_comdat_info *) bfd_alloc (abfd, amt);
- if (coff_section_data (abfd, section)->comdat == NULL)
- abort ();
- coff_section_data (abfd, section)->comdat->symbol =
- (esym - esymstart) / bfd_coff_symesz (abfd);
- amt = strlen (symname) + 1;
- newname = (char *) bfd_alloc (abfd, amt);
- if (newname == NULL)
- abort ();
- strcpy (newname, symname);
- coff_section_data (abfd, section)->comdat->name
- = newname;
- }
- goto breakloop;
- }
- }
- esym += (isym.n_numaux + 1) * bfd_coff_symesz (abfd);
- }
- breakloop:
- return sec_flags;
- }
- /* The PE version; see above for the general comments.
- Since to set the SEC_LINK_ONCE and associated flags, we have to
- look at the symbol table anyway, we return the symbol table index
- of the symbol being used as the COMDAT symbol. This is admittedly
- ugly, but there's really nowhere else that we have access to the
- required information. FIXME: Is the COMDAT symbol index used for
- any purpose other than objdump? */
- static bool
- styp_to_sec_flags (bfd *abfd,
- void * hdr,
- const char *name,
- asection *section,
- flagword *flags_ptr)
- {
- struct internal_scnhdr *internal_s = (struct internal_scnhdr *) hdr;
- unsigned long styp_flags = internal_s->s_flags;
- flagword sec_flags;
- bool result = true;
- bool is_dbg = false;
- if (startswith (name, DOT_DEBUG)
- || startswith (name, DOT_ZDEBUG)
- #ifdef COFF_LONG_SECTION_NAMES
- || startswith (name, GNU_LINKONCE_WI)
- || startswith (name, GNU_LINKONCE_WT)
- /* FIXME: These definitions ought to be in a header file. */
- #define GNU_DEBUGLINK ".gnu_debuglink"
- #define GNU_DEBUGALTLINK ".gnu_debugaltlink"
- || startswith (name, GNU_DEBUGLINK)
- || startswith (name, GNU_DEBUGALTLINK)
- #endif
- || startswith (name, ".stab"))
- is_dbg = true;
- /* Assume read only unless IMAGE_SCN_MEM_WRITE is specified. */
- sec_flags = SEC_READONLY;
- /* If section disallows read, then set the NOREAD flag. */
- if ((styp_flags & IMAGE_SCN_MEM_READ) == 0)
- sec_flags |= SEC_COFF_NOREAD;
- /* Process each flag bit in styp_flags in turn. */
- while (styp_flags)
- {
- unsigned long flag = styp_flags & - styp_flags;
- char * unhandled = NULL;
- styp_flags &= ~ flag;
- /* We infer from the distinct read/write/execute bits the settings
- of some of the bfd flags; the actual values, should we need them,
- are also in pei_section_data (abfd, section)->pe_flags. */
- switch (flag)
- {
- case STYP_DSECT:
- unhandled = "STYP_DSECT";
- break;
- case STYP_GROUP:
- unhandled = "STYP_GROUP";
- break;
- case STYP_COPY:
- unhandled = "STYP_COPY";
- break;
- case STYP_OVER:
- unhandled = "STYP_OVER";
- break;
- #ifdef SEC_NEVER_LOAD
- case STYP_NOLOAD:
- sec_flags |= SEC_NEVER_LOAD;
- break;
- #endif
- case IMAGE_SCN_MEM_READ:
- sec_flags &= ~SEC_COFF_NOREAD;
- break;
- case IMAGE_SCN_TYPE_NO_PAD:
- /* Skip. */
- break;
- case IMAGE_SCN_LNK_OTHER:
- unhandled = "IMAGE_SCN_LNK_OTHER";
- break;
- case IMAGE_SCN_MEM_NOT_CACHED:
- unhandled = "IMAGE_SCN_MEM_NOT_CACHED";
- break;
- case IMAGE_SCN_MEM_NOT_PAGED:
- /* Generate a warning message rather using the 'unhandled'
- variable as this will allow some .sys files generate by
- other toolchains to be processed. See bugzilla issue 196. */
- /* xgettext:c-format */
- _bfd_error_handler (_("%pB: warning: ignoring section flag"
- " %s in section %s"),
- abfd, "IMAGE_SCN_MEM_NOT_PAGED", name);
- break;
- case IMAGE_SCN_MEM_EXECUTE:
- sec_flags |= SEC_CODE;
- break;
- case IMAGE_SCN_MEM_WRITE:
- sec_flags &= ~ SEC_READONLY;
- break;
- case IMAGE_SCN_MEM_DISCARDABLE:
- /* The MS PE spec says that debug sections are DISCARDABLE,
- but the presence of a DISCARDABLE flag does not necessarily
- mean that a given section contains debug information. Thus
- we only set the SEC_DEBUGGING flag on sections that we
- recognise as containing debug information. */
- if (is_dbg
- #ifdef _COMMENT
- || strcmp (name, _COMMENT) == 0
- #endif
- )
- {
- sec_flags |= SEC_DEBUGGING | SEC_READONLY;
- }
- break;
- case IMAGE_SCN_MEM_SHARED:
- sec_flags |= SEC_COFF_SHARED;
- break;
- case IMAGE_SCN_LNK_REMOVE:
- if (!is_dbg)
- sec_flags |= SEC_EXCLUDE;
- break;
- case IMAGE_SCN_CNT_CODE:
- sec_flags |= SEC_CODE | SEC_ALLOC | SEC_LOAD;
- break;
- case IMAGE_SCN_CNT_INITIALIZED_DATA:
- if (is_dbg)
- sec_flags |= SEC_DEBUGGING;
- else
- sec_flags |= SEC_DATA | SEC_ALLOC | SEC_LOAD;
- break;
- case IMAGE_SCN_CNT_UNINITIALIZED_DATA:
- sec_flags |= SEC_ALLOC;
- break;
- case IMAGE_SCN_LNK_INFO:
- /* We mark these as SEC_DEBUGGING, but only if COFF_PAGE_SIZE is
- defined. coff_compute_section_file_positions uses
- COFF_PAGE_SIZE to ensure that the low order bits of the
- section VMA and the file offset match. If we don't know
- COFF_PAGE_SIZE, we can't ensure the correct correspondence,
- and demand page loading of the file will fail. */
- #ifdef COFF_PAGE_SIZE
- sec_flags |= SEC_DEBUGGING;
- #endif
- break;
- case IMAGE_SCN_LNK_COMDAT:
- /* COMDAT gets very special treatment. */
- sec_flags = handle_COMDAT (abfd, sec_flags, hdr, name, section);
- break;
- default:
- /* Silently ignore for now. */
- break;
- }
- /* If the section flag was not handled, report it here. */
- if (unhandled != NULL)
- {
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%pB (%s): section flag %s (%#lx) ignored"),
- abfd, name, unhandled, flag);
- result = false;
- }
- }
- if ((bfd_applicable_section_flags (abfd) & SEC_SMALL_DATA) != 0
- && (startswith (name, ".sbss")
- || startswith (name, ".sdata")))
- sec_flags |= SEC_SMALL_DATA;
- #if defined (COFF_LONG_SECTION_NAMES) && defined (COFF_SUPPORT_GNU_LINKONCE)
- /* As a GNU extension, if the name begins with .gnu.linkonce, we
- only link a single copy of the section. This is used to support
- g++. g++ will emit each template expansion in its own section.
- The symbols will be defined as weak, so that multiple definitions
- are permitted. The GNU linker extension is to actually discard
- all but one of the sections. */
- if (startswith (name, ".gnu.linkonce"))
- sec_flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
- #endif
- if (flags_ptr)
- * flags_ptr = sec_flags;
- return result;
- }
- #endif /* COFF_WITH_PE */
- #define get_index(symbol) ((symbol)->udata.i)
- /*
- INTERNAL_DEFINITION
- bfd_coff_backend_data
- CODE_FRAGMENT
- .{* COFF symbol classifications. *}
- .
- .enum coff_symbol_classification
- .{
- . {* Global symbol. *}
- . COFF_SYMBOL_GLOBAL,
- . {* Common symbol. *}
- . COFF_SYMBOL_COMMON,
- . {* Undefined symbol. *}
- . COFF_SYMBOL_UNDEFINED,
- . {* Local symbol. *}
- . COFF_SYMBOL_LOCAL,
- . {* PE section symbol. *}
- . COFF_SYMBOL_PE_SECTION
- .};
- .
- .typedef asection * (*coff_gc_mark_hook_fn)
- . (asection *, struct bfd_link_info *, struct internal_reloc *,
- . struct coff_link_hash_entry *, struct internal_syment *);
- .
- Special entry points for gdb to swap in coff symbol table parts:
- .typedef struct
- .{
- . void (*_bfd_coff_swap_aux_in)
- . (bfd *, void *, int, int, int, int, void *);
- .
- . void (*_bfd_coff_swap_sym_in)
- . (bfd *, void *, void *);
- .
- . void (*_bfd_coff_swap_lineno_in)
- . (bfd *, void *, void *);
- .
- . unsigned int (*_bfd_coff_swap_aux_out)
- . (bfd *, void *, int, int, int, int, void *);
- .
- . unsigned int (*_bfd_coff_swap_sym_out)
- . (bfd *, void *, void *);
- .
- . unsigned int (*_bfd_coff_swap_lineno_out)
- . (bfd *, void *, void *);
- .
- . unsigned int (*_bfd_coff_swap_reloc_out)
- . (bfd *, void *, void *);
- .
- . unsigned int (*_bfd_coff_swap_filehdr_out)
- . (bfd *, void *, void *);
- .
- . unsigned int (*_bfd_coff_swap_aouthdr_out)
- . (bfd *, void *, void *);
- .
- . unsigned int (*_bfd_coff_swap_scnhdr_out)
- . (bfd *, void *, void *);
- .
- . unsigned int _bfd_filhsz;
- . unsigned int _bfd_aoutsz;
- . unsigned int _bfd_scnhsz;
- . unsigned int _bfd_symesz;
- . unsigned int _bfd_auxesz;
- . unsigned int _bfd_relsz;
- . unsigned int _bfd_linesz;
- . unsigned int _bfd_filnmlen;
- . bool _bfd_coff_long_filenames;
- .
- . bool _bfd_coff_long_section_names;
- . bool (*_bfd_coff_set_long_section_names)
- . (bfd *, int);
- .
- . unsigned int _bfd_coff_default_section_alignment_power;
- . bool _bfd_coff_force_symnames_in_strings;
- . unsigned int _bfd_coff_debug_string_prefix_length;
- . unsigned int _bfd_coff_max_nscns;
- .
- . void (*_bfd_coff_swap_filehdr_in)
- . (bfd *, void *, void *);
- .
- . void (*_bfd_coff_swap_aouthdr_in)
- . (bfd *, void *, void *);
- .
- . void (*_bfd_coff_swap_scnhdr_in)
- . (bfd *, void *, void *);
- .
- . void (*_bfd_coff_swap_reloc_in)
- . (bfd *abfd, void *, void *);
- .
- . bool (*_bfd_coff_bad_format_hook)
- . (bfd *, void *);
- .
- . bool (*_bfd_coff_set_arch_mach_hook)
- . (bfd *, void *);
- .
- . void * (*_bfd_coff_mkobject_hook)
- . (bfd *, void *, void *);
- .
- . bool (*_bfd_styp_to_sec_flags_hook)
- . (bfd *, void *, const char *, asection *, flagword *);
- .
- . void (*_bfd_set_alignment_hook)
- . (bfd *, asection *, void *);
- .
- . bool (*_bfd_coff_slurp_symbol_table)
- . (bfd *);
- .
- . bool (*_bfd_coff_symname_in_debug)
- . (bfd *, struct internal_syment *);
- .
- . bool (*_bfd_coff_pointerize_aux_hook)
- . (bfd *, combined_entry_type *, combined_entry_type *,
- . unsigned int, combined_entry_type *);
- .
- . bool (*_bfd_coff_print_aux)
- . (bfd *, FILE *, combined_entry_type *, combined_entry_type *,
- . combined_entry_type *, unsigned int);
- .
- . void (*_bfd_coff_reloc16_extra_cases)
- . (bfd *, struct bfd_link_info *, struct bfd_link_order *, arelent *,
- . bfd_byte *, unsigned int *, unsigned int *);
- .
- . int (*_bfd_coff_reloc16_estimate)
- . (bfd *, asection *, arelent *, unsigned int,
- . struct bfd_link_info *);
- .
- . enum coff_symbol_classification (*_bfd_coff_classify_symbol)
- . (bfd *, struct internal_syment *);
- .
- . bool (*_bfd_coff_compute_section_file_positions)
- . (bfd *);
- .
- . bool (*_bfd_coff_start_final_link)
- . (bfd *, struct bfd_link_info *);
- .
- . bool (*_bfd_coff_relocate_section)
- . (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
- . struct internal_reloc *, struct internal_syment *, asection **);
- .
- . reloc_howto_type *(*_bfd_coff_rtype_to_howto)
- . (bfd *, asection *, struct internal_reloc *,
- . struct coff_link_hash_entry *, struct internal_syment *, bfd_vma *);
- .
- . bool (*_bfd_coff_adjust_symndx)
- . (bfd *, struct bfd_link_info *, bfd *, asection *,
- . struct internal_reloc *, bool *);
- .
- . bool (*_bfd_coff_link_add_one_symbol)
- . (struct bfd_link_info *, bfd *, const char *, flagword,
- . asection *, bfd_vma, const char *, bool, bool,
- . struct bfd_link_hash_entry **);
- .
- . bool (*_bfd_coff_link_output_has_begun)
- . (bfd *, struct coff_final_link_info *);
- .
- . bool (*_bfd_coff_final_link_postscript)
- . (bfd *, struct coff_final_link_info *);
- .
- . bool (*_bfd_coff_print_pdata)
- . (bfd *, void *);
- .
- .} bfd_coff_backend_data;
- .
- .#define coff_backend_info(abfd) \
- . ((bfd_coff_backend_data *) (abfd)->xvec->backend_data)
- .
- .#define bfd_coff_swap_aux_in(a,e,t,c,ind,num,i) \
- . ((coff_backend_info (a)->_bfd_coff_swap_aux_in) (a,e,t,c,ind,num,i))
- .
- .#define bfd_coff_swap_sym_in(a,e,i) \
- . ((coff_backend_info (a)->_bfd_coff_swap_sym_in) (a,e,i))
- .
- .#define bfd_coff_swap_lineno_in(a,e,i) \
- . ((coff_backend_info ( a)->_bfd_coff_swap_lineno_in) (a,e,i))
- .
- .#define bfd_coff_swap_reloc_out(abfd, i, o) \
- . ((coff_backend_info (abfd)->_bfd_coff_swap_reloc_out) (abfd, i, o))
- .
- .#define bfd_coff_swap_lineno_out(abfd, i, o) \
- . ((coff_backend_info (abfd)->_bfd_coff_swap_lineno_out) (abfd, i, o))
- .
- .#define bfd_coff_swap_aux_out(a,i,t,c,ind,num,o) \
- . ((coff_backend_info (a)->_bfd_coff_swap_aux_out) (a,i,t,c,ind,num,o))
- .
- .#define bfd_coff_swap_sym_out(abfd, i,o) \
- . ((coff_backend_info (abfd)->_bfd_coff_swap_sym_out) (abfd, i, o))
- .
- .#define bfd_coff_swap_scnhdr_out(abfd, i,o) \
- . ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_out) (abfd, i, o))
- .
- .#define bfd_coff_swap_filehdr_out(abfd, i,o) \
- . ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_out) (abfd, i, o))
- .
- .#define bfd_coff_swap_aouthdr_out(abfd, i,o) \
- . ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_out) (abfd, i, o))
- .
- .#define bfd_coff_filhsz(abfd) (coff_backend_info (abfd)->_bfd_filhsz)
- .#define bfd_coff_aoutsz(abfd) (coff_backend_info (abfd)->_bfd_aoutsz)
- .#define bfd_coff_scnhsz(abfd) (coff_backend_info (abfd)->_bfd_scnhsz)
- .#define bfd_coff_symesz(abfd) (coff_backend_info (abfd)->_bfd_symesz)
- .#define bfd_coff_auxesz(abfd) (coff_backend_info (abfd)->_bfd_auxesz)
- .#define bfd_coff_relsz(abfd) (coff_backend_info (abfd)->_bfd_relsz)
- .#define bfd_coff_linesz(abfd) (coff_backend_info (abfd)->_bfd_linesz)
- .#define bfd_coff_filnmlen(abfd) (coff_backend_info (abfd)->_bfd_filnmlen)
- .#define bfd_coff_long_filenames(abfd) \
- . (coff_backend_info (abfd)->_bfd_coff_long_filenames)
- .#define bfd_coff_long_section_names(abfd) \
- . (coff_backend_info (abfd)->_bfd_coff_long_section_names)
- .#define bfd_coff_set_long_section_names(abfd, enable) \
- . ((coff_backend_info (abfd)->_bfd_coff_set_long_section_names) (abfd, enable))
- .#define bfd_coff_default_section_alignment_power(abfd) \
- . (coff_backend_info (abfd)->_bfd_coff_default_section_alignment_power)
- .#define bfd_coff_max_nscns(abfd) \
- . (coff_backend_info (abfd)->_bfd_coff_max_nscns)
- .
- .#define bfd_coff_swap_filehdr_in(abfd, i,o) \
- . ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_in) (abfd, i, o))
- .
- .#define bfd_coff_swap_aouthdr_in(abfd, i,o) \
- . ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_in) (abfd, i, o))
- .
- .#define bfd_coff_swap_scnhdr_in(abfd, i,o) \
- . ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_in) (abfd, i, o))
- .
- .#define bfd_coff_swap_reloc_in(abfd, i, o) \
- . ((coff_backend_info (abfd)->_bfd_coff_swap_reloc_in) (abfd, i, o))
- .
- .#define bfd_coff_bad_format_hook(abfd, filehdr) \
- . ((coff_backend_info (abfd)->_bfd_coff_bad_format_hook) (abfd, filehdr))
- .
- .#define bfd_coff_set_arch_mach_hook(abfd, filehdr)\
- . ((coff_backend_info (abfd)->_bfd_coff_set_arch_mach_hook) (abfd, filehdr))
- .#define bfd_coff_mkobject_hook(abfd, filehdr, aouthdr)\
- . ((coff_backend_info (abfd)->_bfd_coff_mkobject_hook)\
- . (abfd, filehdr, aouthdr))
- .
- .#define bfd_coff_styp_to_sec_flags_hook(abfd, scnhdr, name, section, flags_ptr)\
- . ((coff_backend_info (abfd)->_bfd_styp_to_sec_flags_hook)\
- . (abfd, scnhdr, name, section, flags_ptr))
- .
- .#define bfd_coff_set_alignment_hook(abfd, sec, scnhdr)\
- . ((coff_backend_info (abfd)->_bfd_set_alignment_hook) (abfd, sec, scnhdr))
- .
- .#define bfd_coff_slurp_symbol_table(abfd)\
- . ((coff_backend_info (abfd)->_bfd_coff_slurp_symbol_table) (abfd))
- .
- .#define bfd_coff_symname_in_debug(abfd, sym)\
- . ((coff_backend_info (abfd)->_bfd_coff_symname_in_debug) (abfd, sym))
- .
- .#define bfd_coff_force_symnames_in_strings(abfd)\
- . (coff_backend_info (abfd)->_bfd_coff_force_symnames_in_strings)
- .
- .#define bfd_coff_debug_string_prefix_length(abfd)\
- . (coff_backend_info (abfd)->_bfd_coff_debug_string_prefix_length)
- .
- .#define bfd_coff_print_aux(abfd, file, base, symbol, aux, indaux)\
- . ((coff_backend_info (abfd)->_bfd_coff_print_aux)\
- . (abfd, file, base, symbol, aux, indaux))
- .
- .#define bfd_coff_reloc16_extra_cases(abfd, link_info, link_order,\
- . reloc, data, src_ptr, dst_ptr)\
- . ((coff_backend_info (abfd)->_bfd_coff_reloc16_extra_cases)\
- . (abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr))
- .
- .#define bfd_coff_reloc16_estimate(abfd, section, reloc, shrink, link_info)\
- . ((coff_backend_info (abfd)->_bfd_coff_reloc16_estimate)\
- . (abfd, section, reloc, shrink, link_info))
- .
- .#define bfd_coff_classify_symbol(abfd, sym)\
- . ((coff_backend_info (abfd)->_bfd_coff_classify_symbol)\
- . (abfd, sym))
- .
- .#define bfd_coff_compute_section_file_positions(abfd)\
- . ((coff_backend_info (abfd)->_bfd_coff_compute_section_file_positions)\
- . (abfd))
- .
- .#define bfd_coff_start_final_link(obfd, info)\
- . ((coff_backend_info (obfd)->_bfd_coff_start_final_link)\
- . (obfd, info))
- .#define bfd_coff_relocate_section(obfd,info,ibfd,o,con,rel,isyms,secs)\
- . ((coff_backend_info (ibfd)->_bfd_coff_relocate_section)\
- . (obfd, info, ibfd, o, con, rel, isyms, secs))
- .#define bfd_coff_rtype_to_howto(abfd, sec, rel, h, sym, addendp)\
- . ((coff_backend_info (abfd)->_bfd_coff_rtype_to_howto)\
- . (abfd, sec, rel, h, sym, addendp))
- .#define bfd_coff_adjust_symndx(obfd, info, ibfd, sec, rel, adjustedp)\
- . ((coff_backend_info (abfd)->_bfd_coff_adjust_symndx)\
- . (obfd, info, ibfd, sec, rel, adjustedp))
- .#define bfd_coff_link_add_one_symbol(info, abfd, name, flags, section,\
- . value, string, cp, coll, hashp)\
- . ((coff_backend_info (abfd)->_bfd_coff_link_add_one_symbol)\
- . (info, abfd, name, flags, section, value, string, cp, coll, hashp))
- .
- .#define bfd_coff_link_output_has_begun(a,p) \
- . ((coff_backend_info (a)->_bfd_coff_link_output_has_begun) (a, p))
- .#define bfd_coff_final_link_postscript(a,p) \
- . ((coff_backend_info (a)->_bfd_coff_final_link_postscript) (a, p))
- .
- .#define bfd_coff_have_print_pdata(a) \
- . (coff_backend_info (a)->_bfd_coff_print_pdata)
- .#define bfd_coff_print_pdata(a,p) \
- . ((coff_backend_info (a)->_bfd_coff_print_pdata) (a, p))
- .
- .{* Macro: Returns true if the bfd is a PE executable as opposed to a
- . PE object file. *}
- .#define bfd_pei_p(abfd) \
- . (startswith ((abfd)->xvec->name, "pei-"))
- */
- /* See whether the magic number matches. */
- static bool
- coff_bad_format_hook (bfd * abfd ATTRIBUTE_UNUSED, void * filehdr)
- {
- struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
- if (BADMAG (*internal_f))
- return false;
- return true;
- }
- #ifdef TICOFF
- static bool
- ticoff0_bad_format_hook (bfd *abfd ATTRIBUTE_UNUSED, void * filehdr)
- {
- struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
- if (COFF0_BADMAG (*internal_f))
- return false;
- return true;
- }
- #endif
- #ifdef TICOFF
- static bool
- ticoff1_bad_format_hook (bfd *abfd ATTRIBUTE_UNUSED, void * filehdr)
- {
- struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
- if (COFF1_BADMAG (*internal_f))
- return false;
- return true;
- }
- #endif
- /* Check whether this section uses an alignment other than the
- default. */
- static void
- coff_set_custom_section_alignment (bfd *abfd ATTRIBUTE_UNUSED,
- asection *section,
- const struct coff_section_alignment_entry *alignment_table,
- const unsigned int table_size)
- {
- const unsigned int default_alignment = COFF_DEFAULT_SECTION_ALIGNMENT_POWER;
- unsigned int i;
- for (i = 0; i < table_size; ++i)
- {
- const char *secname = bfd_section_name (section);
- if (alignment_table[i].comparison_length == (unsigned int) -1
- ? strcmp (alignment_table[i].name, secname) == 0
- : strncmp (alignment_table[i].name, secname,
- alignment_table[i].comparison_length) == 0)
- break;
- }
- if (i >= table_size)
- return;
- if (alignment_table[i].default_alignment_min != COFF_ALIGNMENT_FIELD_EMPTY
- && default_alignment < alignment_table[i].default_alignment_min)
- return;
- if (alignment_table[i].default_alignment_max != COFF_ALIGNMENT_FIELD_EMPTY
- #if COFF_DEFAULT_SECTION_ALIGNMENT_POWER != 0
- && default_alignment > alignment_table[i].default_alignment_max
- #endif
- )
- return;
- section->alignment_power = alignment_table[i].alignment_power;
- }
- /* Custom section alignment records. */
- static const struct coff_section_alignment_entry
- coff_section_alignment_table[] =
- {
- #ifdef COFF_SECTION_ALIGNMENT_ENTRIES
- COFF_SECTION_ALIGNMENT_ENTRIES,
- #endif
- /* There must not be any gaps between .stabstr sections. */
- { COFF_SECTION_NAME_PARTIAL_MATCH (".stabstr"),
- 1, COFF_ALIGNMENT_FIELD_EMPTY, 0 },
- /* The .stab section must be aligned to 2**2 at most, to avoid gaps. */
- { COFF_SECTION_NAME_PARTIAL_MATCH (".stab"),
- 3, COFF_ALIGNMENT_FIELD_EMPTY, 2 },
- /* Similarly for the .ctors and .dtors sections. */
- { COFF_SECTION_NAME_EXACT_MATCH (".ctors"),
- 3, COFF_ALIGNMENT_FIELD_EMPTY, 2 },
- { COFF_SECTION_NAME_EXACT_MATCH (".dtors"),
- 3, COFF_ALIGNMENT_FIELD_EMPTY, 2 }
- };
- static const unsigned int coff_section_alignment_table_size =
- sizeof coff_section_alignment_table / sizeof coff_section_alignment_table[0];
- /* Initialize a section structure with information peculiar to this
- particular implementation of COFF. */
- static bool
- coff_new_section_hook (bfd * abfd, asection * section)
- {
- combined_entry_type *native;
- size_t amt;
- unsigned char sclass = C_STAT;
- section->alignment_power = COFF_DEFAULT_SECTION_ALIGNMENT_POWER;
- #ifdef RS6000COFF_C
- if (bfd_xcoff_text_align_power (abfd) != 0
- && strcmp (bfd_section_name (section), ".text") == 0)
- section->alignment_power = bfd_xcoff_text_align_power (abfd);
- else if (bfd_xcoff_data_align_power (abfd) != 0
- && strcmp (bfd_section_name (section), ".data") == 0)
- section->alignment_power = bfd_xcoff_data_align_power (abfd);
- else
- {
- int i;
- for (i = 0; i < XCOFF_DWSECT_NBR_NAMES; i++)
- if (strcmp (bfd_section_name (section),
- xcoff_dwsect_names[i].xcoff_name) == 0)
- {
- section->alignment_power = 0;
- sclass = C_DWARF;
- break;
- }
- }
- #endif
- /* Set up the section symbol. */
- if (!_bfd_generic_new_section_hook (abfd, section))
- return false;
- /* Allocate aux records for section symbols, to store size and
- related info.
- @@ The 10 is a guess at a plausible maximum number of aux entries
- (but shouldn't be a constant). */
- amt = sizeof (combined_entry_type) * 10;
- native = (combined_entry_type *) bfd_zalloc (abfd, amt);
- if (native == NULL)
- return false;
- /* We don't need to set up n_name, n_value, or n_scnum in the native
- symbol information, since they'll be overridden by the BFD symbol
- anyhow. However, we do need to set the type and storage class,
- in case this symbol winds up getting written out. The value 0
- for n_numaux is already correct. */
- native->is_sym = true;
- native->u.syment.n_type = T_NULL;
- native->u.syment.n_sclass = sclass;
- coffsymbol (section->symbol)->native = native;
- coff_set_custom_section_alignment (abfd, section,
- coff_section_alignment_table,
- coff_section_alignment_table_size);
- return true;
- }
- #ifdef COFF_ALIGN_IN_SECTION_HEADER
- /* Set the alignment of a BFD section. */
- static void
- coff_set_alignment_hook (bfd * abfd ATTRIBUTE_UNUSED,
- asection * section,
- void * scnhdr)
- {
- struct internal_scnhdr *hdr = (struct internal_scnhdr *) scnhdr;
- unsigned int i;
- #ifdef COFF_DECODE_ALIGNMENT
- i = COFF_DECODE_ALIGNMENT(hdr->s_flags);
- #endif
- section->alignment_power = i;
- #ifdef coff_set_section_load_page
- coff_set_section_load_page (section, hdr->s_page);
- #endif
- }
- #else /* ! COFF_ALIGN_IN_SECTION_HEADER */
- #ifdef COFF_WITH_PE
- static void
- coff_set_alignment_hook (bfd * abfd ATTRIBUTE_UNUSED,
- asection * section,
- void * scnhdr)
- {
- struct internal_scnhdr *hdr = (struct internal_scnhdr *) scnhdr;
- size_t amt;
- unsigned int alignment_power_const
- = hdr->s_flags & IMAGE_SCN_ALIGN_POWER_BIT_MASK;
- switch (alignment_power_const)
- {
- case IMAGE_SCN_ALIGN_8192BYTES:
- case IMAGE_SCN_ALIGN_4096BYTES:
- case IMAGE_SCN_ALIGN_2048BYTES:
- case IMAGE_SCN_ALIGN_1024BYTES:
- case IMAGE_SCN_ALIGN_512BYTES:
- case IMAGE_SCN_ALIGN_256BYTES:
- case IMAGE_SCN_ALIGN_128BYTES:
- case IMAGE_SCN_ALIGN_64BYTES:
- case IMAGE_SCN_ALIGN_32BYTES:
- case IMAGE_SCN_ALIGN_16BYTES:
- case IMAGE_SCN_ALIGN_8BYTES:
- case IMAGE_SCN_ALIGN_4BYTES:
- case IMAGE_SCN_ALIGN_2BYTES:
- case IMAGE_SCN_ALIGN_1BYTES:
- section->alignment_power
- = IMAGE_SCN_ALIGN_POWER_NUM (alignment_power_const);
- break;
- default:
- break;
- }
- /* In a PE image file, the s_paddr field holds the virtual size of a
- section, while the s_size field holds the raw size. We also keep
- the original section flag value, since not every bit can be
- mapped onto a generic BFD section bit. */
- if (coff_section_data (abfd, section) == NULL)
- {
- amt = sizeof (struct coff_section_tdata);
- section->used_by_bfd = bfd_zalloc (abfd, amt);
- if (section->used_by_bfd == NULL)
- /* FIXME: Return error. */
- abort ();
- }
- if (pei_section_data (abfd, section) == NULL)
- {
- amt = sizeof (struct pei_section_tdata);
- coff_section_data (abfd, section)->tdata = bfd_zalloc (abfd, amt);
- if (coff_section_data (abfd, section)->tdata == NULL)
- /* FIXME: Return error. */
- abort ();
- }
- pei_section_data (abfd, section)->virt_size = hdr->s_paddr;
- pei_section_data (abfd, section)->pe_flags = hdr->s_flags;
- section->lma = hdr->s_vaddr;
- /* Check for extended relocs. */
- if (hdr->s_flags & IMAGE_SCN_LNK_NRELOC_OVFL)
- {
- struct external_reloc dst;
- struct internal_reloc n;
- file_ptr oldpos = bfd_tell (abfd);
- bfd_size_type relsz = bfd_coff_relsz (abfd);
- if (bfd_seek (abfd, (file_ptr) hdr->s_relptr, 0) != 0)
- return;
- if (bfd_bread (& dst, relsz, abfd) != relsz)
- return;
- bfd_coff_swap_reloc_in (abfd, &dst, &n);
- if (bfd_seek (abfd, oldpos, 0) != 0)
- return;
- if (n.r_vaddr < 0x10000)
- {
- _bfd_error_handler (_("%pB: overflow reloc count too small"), abfd);
- bfd_set_error (bfd_error_bad_value);
- return;
- }
- section->reloc_count = hdr->s_nreloc = n.r_vaddr - 1;
- section->rel_filepos += relsz;
- }
- else if (hdr->s_nreloc == 0xffff)
- _bfd_error_handler
- (_("%pB: warning: claims to have 0xffff relocs, without overflow"),
- abfd);
- }
- #undef ALIGN_SET
- #undef ELIFALIGN_SET
- #else /* ! COFF_WITH_PE */
- #ifdef RS6000COFF_C
- /* We grossly abuse this function to handle XCOFF overflow headers.
- When we see one, we correct the reloc and line number counts in the
- real header, and remove the section we just created. */
- static void
- coff_set_alignment_hook (bfd *abfd, asection *section, void * scnhdr)
- {
- struct internal_scnhdr *hdr = (struct internal_scnhdr *) scnhdr;
- asection *real_sec;
- if ((hdr->s_flags & STYP_OVRFLO) == 0)
- return;
- real_sec = coff_section_from_bfd_index (abfd, (int) hdr->s_nreloc);
- if (real_sec == NULL)
- return;
- real_sec->reloc_count = hdr->s_paddr;
- real_sec->lineno_count = hdr->s_vaddr;
- if (!bfd_section_removed_from_list (abfd, section))
- {
- bfd_section_list_remove (abfd, section);
- --abfd->section_count;
- }
- }
- #else /* ! RS6000COFF_C */
- #if defined (COFF_GO32_EXE) || defined (COFF_GO32)
- static void
- coff_set_alignment_hook (bfd * abfd, asection * section, void * scnhdr)
- {
- struct internal_scnhdr *hdr = (struct internal_scnhdr *) scnhdr;
- /* Check for extended relocs. */
- if (hdr->s_flags & IMAGE_SCN_LNK_NRELOC_OVFL)
- {
- struct external_reloc dst;
- struct internal_reloc n;
- const file_ptr oldpos = bfd_tell (abfd);
- const bfd_size_type relsz = bfd_coff_relsz (abfd);
- if (bfd_seek (abfd, (file_ptr) hdr->s_relptr, 0) != 0)
- return;
- if (bfd_bread (& dst, relsz, abfd) != relsz)
- return;
- bfd_coff_swap_reloc_in (abfd, &dst, &n);
- if (bfd_seek (abfd, oldpos, 0) != 0)
- return;
- section->reloc_count = hdr->s_nreloc = n.r_vaddr - 1;
- section->rel_filepos += relsz;
- }
- else if (hdr->s_nreloc == 0xffff)
- _bfd_error_handler
- (_("%pB: warning: claims to have 0xffff relocs, without overflow"),
- abfd);
- }
- #else /* ! COFF_GO32_EXE && ! COFF_GO32 */
- static void
- coff_set_alignment_hook (bfd *abfd ATTRIBUTE_UNUSED,
- asection *section ATTRIBUTE_UNUSED,
- void *scnhdr ATTRIBUTE_UNUSED)
- {
- }
- #endif /* ! COFF_GO32_EXE && ! COFF_GO32 */
- #endif /* ! RS6000COFF_C */
- #endif /* ! COFF_WITH_PE */
- #endif /* ! COFF_ALIGN_IN_SECTION_HEADER */
- #ifndef coff_mkobject
- static bool
- coff_mkobject (bfd * abfd)
- {
- coff_data_type *coff;
- size_t amt = sizeof (coff_data_type);
- abfd->tdata.coff_obj_data = bfd_zalloc (abfd, amt);
- if (abfd->tdata.coff_obj_data == NULL)
- return false;
- coff = coff_data (abfd);
- coff->symbols = NULL;
- coff->conversion_table = NULL;
- coff->raw_syments = NULL;
- coff->relocbase = 0;
- coff->local_toc_sym_map = 0;
- /* make_abs_section(abfd);*/
- return true;
- }
- #endif
- /* Create the COFF backend specific information. */
- #ifndef coff_mkobject_hook
- static void *
- coff_mkobject_hook (bfd * abfd,
- void * filehdr,
- void * aouthdr ATTRIBUTE_UNUSED)
- {
- struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
- coff_data_type *coff;
- if (! coff_mkobject (abfd))
- return NULL;
- coff = coff_data (abfd);
- coff->sym_filepos = internal_f->f_symptr;
- /* These members communicate important constants about the symbol
- table to GDB's symbol-reading code. These `constants'
- unfortunately vary among coff implementations... */
- coff->local_n_btmask = N_BTMASK;
- coff->local_n_btshft = N_BTSHFT;
- coff->local_n_tmask = N_TMASK;
- coff->local_n_tshift = N_TSHIFT;
- coff->local_symesz = bfd_coff_symesz (abfd);
- coff->local_auxesz = bfd_coff_auxesz (abfd);
- coff->local_linesz = bfd_coff_linesz (abfd);
- coff->timestamp = internal_f->f_timdat;
- obj_raw_syment_count (abfd) =
- obj_conv_table_size (abfd) =
- internal_f->f_nsyms;
- #ifdef RS6000COFF_C
- if ((internal_f->f_flags & F_SHROBJ) != 0)
- abfd->flags |= DYNAMIC;
- if (aouthdr != NULL && internal_f->f_opthdr >= bfd_coff_aoutsz (abfd))
- {
- struct internal_aouthdr *internal_a =
- (struct internal_aouthdr *) aouthdr;
- struct xcoff_tdata *xcoff;
- xcoff = xcoff_data (abfd);
- # ifdef U803XTOCMAGIC
- xcoff->xcoff64 = internal_f->f_magic == U803XTOCMAGIC;
- # else
- xcoff->xcoff64 = 0;
- # endif
- xcoff->full_aouthdr = true;
- xcoff->toc = internal_a->o_toc;
- xcoff->sntoc = internal_a->o_sntoc;
- xcoff->snentry = internal_a->o_snentry;
- bfd_xcoff_text_align_power (abfd) = internal_a->o_algntext;
- bfd_xcoff_data_align_power (abfd) = internal_a->o_algndata;
- xcoff->modtype = internal_a->o_modtype;
- xcoff->cputype = internal_a->o_cputype;
- xcoff->maxdata = internal_a->o_maxdata;
- xcoff->maxstack = internal_a->o_maxstack;
- }
- #endif
- #ifdef ARM
- /* Set the flags field from the COFF header read in. */
- if (! _bfd_coff_arm_set_private_flags (abfd, internal_f->f_flags))
- coff->flags = 0;
- #endif
- #ifdef COFF_WITH_PE
- /* FIXME: I'm not sure this is ever executed, since peicode.h
- defines coff_mkobject_hook. */
- if ((internal_f->f_flags & IMAGE_FILE_DEBUG_STRIPPED) == 0)
- abfd->flags |= HAS_DEBUG;
- #endif
- return coff;
- }
- #endif
- /* Determine the machine architecture and type. FIXME: This is target
- dependent because the magic numbers are defined in the target
- dependent header files. But there is no particular need for this.
- If the magic numbers were moved to a separate file, this function
- would be target independent and would also be much more successful
- at linking together COFF files for different architectures. */
- static bool
- coff_set_arch_mach_hook (bfd *abfd, void * filehdr)
- {
- unsigned long machine;
- enum bfd_architecture arch;
- struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
- /* Zero selects the default machine for an arch. */
- machine = 0;
- switch (internal_f->f_magic)
- {
- #ifdef I386MAGIC
- case I386MAGIC:
- case I386PTXMAGIC:
- case I386AIXMAGIC: /* Danbury PS/2 AIX C Compiler. */
- case LYNXCOFFMAGIC:
- case I386_APPLE_MAGIC:
- case I386_FREEBSD_MAGIC:
- case I386_LINUX_MAGIC:
- case I386_NETBSD_MAGIC:
- arch = bfd_arch_i386;
- break;
- #endif
- #ifdef AMD64MAGIC
- case AMD64MAGIC:
- case AMD64_APPLE_MAGIC:
- case AMD64_FREEBSD_MAGIC:
- case AMD64_LINUX_MAGIC:
- case AMD64_NETBSD_MAGIC:
- arch = bfd_arch_i386;
- machine = bfd_mach_x86_64;
- break;
- #endif
- #ifdef IA64MAGIC
- case IA64MAGIC:
- arch = bfd_arch_ia64;
- break;
- #endif
- #ifdef ARMMAGIC
- case ARMMAGIC:
- case ARMPEMAGIC:
- case THUMBPEMAGIC:
- arch = bfd_arch_arm;
- machine = bfd_arm_get_mach_from_notes (abfd, ARM_NOTE_SECTION);
- if (machine == bfd_mach_arm_unknown)
- {
- switch (internal_f->f_flags & F_ARM_ARCHITECTURE_MASK)
- {
- case F_ARM_2: machine = bfd_mach_arm_2; break;
- case F_ARM_2a: machine = bfd_mach_arm_2a; break;
- case F_ARM_3: machine = bfd_mach_arm_3; break;
- default:
- case F_ARM_3M: machine = bfd_mach_arm_3M; break;
- case F_ARM_4: machine = bfd_mach_arm_4; break;
- case F_ARM_4T: machine = bfd_mach_arm_4T; break;
- /* The COFF header does not have enough bits available
- to cover all the different ARM architectures. So
- we interpret F_ARM_5, the highest flag value to mean
- "the highest ARM architecture known to BFD" which is
- currently the XScale. */
- case F_ARM_5: machine = bfd_mach_arm_XScale; break;
- }
- }
- break;
- #endif
- #ifdef AARCH64MAGIC
- case AARCH64MAGIC:
- arch = bfd_arch_aarch64;
- machine = internal_f->f_flags & F_AARCH64_ARCHITECTURE_MASK;
- break;
- #endif
- #ifdef Z80MAGIC
- case Z80MAGIC:
- arch = bfd_arch_z80;
- switch (internal_f->f_flags & F_MACHMASK)
- {
- case bfd_mach_z80strict << 12:
- case bfd_mach_z80 << 12:
- case bfd_mach_z80n << 12:
- case bfd_mach_z80full << 12:
- case bfd_mach_r800 << 12:
- case bfd_mach_gbz80 << 12:
- case bfd_mach_z180 << 12:
- case bfd_mach_ez80_z80 << 12:
- case bfd_mach_ez80_adl << 12:
- machine = ((unsigned)internal_f->f_flags & F_MACHMASK) >> 12;
- break;
- default:
- return false;
- }
- break;
- #endif
- #ifdef Z8KMAGIC
- case Z8KMAGIC:
- arch = bfd_arch_z8k;
- switch (internal_f->f_flags & F_MACHMASK)
- {
- case F_Z8001:
- machine = bfd_mach_z8001;
- break;
- case F_Z8002:
- machine = bfd_mach_z8002;
- break;
- default:
- return false;
- }
- break;
- #endif
- #ifdef RS6000COFF_C
- #ifdef XCOFF64
- case U64_TOCMAGIC:
- case U803XTOCMAGIC:
- #else
- case U802ROMAGIC:
- case U802WRMAGIC:
- case U802TOCMAGIC:
- #endif
- {
- int cputype;
- if (xcoff_data (abfd)->cputype != -1)
- cputype = xcoff_data (abfd)->cputype & 0xff;
- else
- {
- /* We did not get a value from the a.out header. If the
- file has not been stripped, we may be able to get the
- architecture information from the first symbol, if it
- is a .file symbol. */
- if (obj_raw_syment_count (abfd) == 0)
- cputype = 0;
- else
- {
- bfd_byte *buf;
- struct internal_syment sym;
- bfd_size_type amt = bfd_coff_symesz (abfd);
- if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0)
- return false;
- buf = _bfd_malloc_and_read (abfd, amt, amt);
- if (buf == NULL)
- return false;
- bfd_coff_swap_sym_in (abfd, buf, & sym);
- if (sym.n_sclass == C_FILE)
- cputype = sym.n_type & 0xff;
- else
- cputype = 0;
- free (buf);
- }
- }
- /* FIXME: We don't handle all cases here. */
- switch (cputype)
- {
- default:
- case 0:
- arch = bfd_xcoff_architecture (abfd);
- machine = bfd_xcoff_machine (abfd);
- break;
- case 1:
- arch = bfd_arch_powerpc;
- machine = bfd_mach_ppc_601;
- break;
- case 2: /* 64 bit PowerPC */
- arch = bfd_arch_powerpc;
- machine = bfd_mach_ppc_620;
- break;
- case 3:
- arch = bfd_arch_powerpc;
- machine = bfd_mach_ppc;
- break;
- case 4:
- arch = bfd_arch_rs6000;
- machine = bfd_mach_rs6k;
- break;
- }
- }
- break;
- #endif
- #ifdef SH_ARCH_MAGIC_BIG
- case SH_ARCH_MAGIC_BIG:
- case SH_ARCH_MAGIC_LITTLE:
- #ifdef COFF_WITH_PE
- case SH_ARCH_MAGIC_WINCE:
- #endif
- arch = bfd_arch_sh;
- break;
- #endif
- #ifdef MIPS_ARCH_MAGIC_WINCE
- case MIPS_ARCH_MAGIC_WINCE:
- arch = bfd_arch_mips;
- break;
- #endif
- #ifdef SPARCMAGIC
- case SPARCMAGIC:
- #ifdef LYNXCOFFMAGIC
- case LYNXCOFFMAGIC:
- #endif
- arch = bfd_arch_sparc;
- break;
- #endif
- #ifdef TIC30MAGIC
- case TIC30MAGIC:
- arch = bfd_arch_tic30;
- break;
- #endif
- #ifdef TICOFF0MAGIC
- #ifdef TICOFF_TARGET_ARCH
- /* This TI COFF section should be used by all new TI COFF v0 targets. */
- case TICOFF0MAGIC:
- arch = TICOFF_TARGET_ARCH;
- machine = TICOFF_TARGET_MACHINE_GET (internal_f->f_flags);
- break;
- #endif
- #endif
- #ifdef TICOFF1MAGIC
- /* This TI COFF section should be used by all new TI COFF v1/2 targets. */
- /* TI COFF1 and COFF2 use the target_id field to specify which arch. */
- case TICOFF1MAGIC:
- case TICOFF2MAGIC:
- switch (internal_f->f_target_id)
- {
- #ifdef TI_TARGET_ID
- case TI_TARGET_ID:
- arch = TICOFF_TARGET_ARCH;
- machine = TICOFF_TARGET_MACHINE_GET (internal_f->f_flags);
- break;
- #endif
- default:
- arch = bfd_arch_obscure;
- _bfd_error_handler
- (_("unrecognized TI COFF target id '0x%x'"),
- internal_f->f_target_id);
- break;
- }
- break;
- #endif
- #ifdef MCOREMAGIC
- case MCOREMAGIC:
- arch = bfd_arch_mcore;
- break;
- #endif
- default: /* Unreadable input file type. */
- arch = bfd_arch_obscure;
- break;
- }
- bfd_default_set_arch_mach (abfd, arch, machine);
- return true;
- }
- static bool
- symname_in_debug_hook (bfd *abfd ATTRIBUTE_UNUSED,
- struct internal_syment *sym ATTRIBUTE_UNUSED)
- {
- #ifdef SYMNAME_IN_DEBUG
- return SYMNAME_IN_DEBUG (sym) != 0;
- #else
- return false;
- #endif
- }
- #ifdef RS6000COFF_C
- #ifdef XCOFF64
- #define FORCE_SYMNAMES_IN_STRINGS
- #endif
- /* Handle the csect auxent of a C_EXT, C_AIX_WEAKEXT or C_HIDEXT symbol. */
- static bool
- coff_pointerize_aux_hook (bfd *abfd ATTRIBUTE_UNUSED,
- combined_entry_type *table_base,
- combined_entry_type *symbol,
- unsigned int indaux,
- combined_entry_type *aux)
- {
- BFD_ASSERT (symbol->is_sym);
- int n_sclass = symbol->u.syment.n_sclass;
- if (CSECT_SYM_P (n_sclass)
- && indaux + 1 == symbol->u.syment.n_numaux)
- {
- BFD_ASSERT (! aux->is_sym);
- if (SMTYP_SMTYP (aux->u.auxent.x_csect.x_smtyp) == XTY_LD)
- {
- aux->u.auxent.x_csect.x_scnlen.p =
- table_base + aux->u.auxent.x_csect.x_scnlen.l;
- aux->fix_scnlen = 1;
- }
- /* Return TRUE to indicate that the caller should not do any
- further work on this auxent. */
- return true;
- }
- /* Return FALSE to indicate that this auxent should be handled by
- the caller. */
- return false;
- }
- #else
- #define coff_pointerize_aux_hook 0
- #endif /* ! RS6000COFF_C */
- /* Print an aux entry. This returns TRUE if it has printed it. */
- static bool
- coff_print_aux (bfd *abfd ATTRIBUTE_UNUSED,
- FILE *file ATTRIBUTE_UNUSED,
- combined_entry_type *table_base ATTRIBUTE_UNUSED,
- combined_entry_type *symbol ATTRIBUTE_UNUSED,
- combined_entry_type *aux ATTRIBUTE_UNUSED,
- unsigned int indaux ATTRIBUTE_UNUSED)
- {
- BFD_ASSERT (symbol->is_sym);
- BFD_ASSERT (! aux->is_sym);
- #ifdef RS6000COFF_C
- if (CSECT_SYM_P (symbol->u.syment.n_sclass)
- && indaux + 1 == symbol->u.syment.n_numaux)
- {
- /* This is a csect entry. */
- fprintf (file, "AUX ");
- if (SMTYP_SMTYP (aux->u.auxent.x_csect.x_smtyp) != XTY_LD)
- {
- BFD_ASSERT (! aux->fix_scnlen);
- fprintf (file, "val %5" BFD_VMA_FMT "d",
- aux->u.auxent.x_csect.x_scnlen.l);
- }
- else
- {
- fprintf (file, "indx ");
- if (! aux->fix_scnlen)
- fprintf (file, "%4" BFD_VMA_FMT "d",
- aux->u.auxent.x_csect.x_scnlen.l);
- else
- fprintf (file, "%4ld",
- (long) (aux->u.auxent.x_csect.x_scnlen.p - table_base));
- }
- fprintf (file,
- " prmhsh %ld snhsh %u typ %d algn %d clss %u stb %ld snstb %u",
- aux->u.auxent.x_csect.x_parmhash,
- (unsigned int) aux->u.auxent.x_csect.x_snhash,
- SMTYP_SMTYP (aux->u.auxent.x_csect.x_smtyp),
- SMTYP_ALIGN (aux->u.auxent.x_csect.x_smtyp),
- (unsigned int) aux->u.auxent.x_csect.x_smclas,
- aux->u.auxent.x_csect.x_stab,
- (unsigned int) aux->u.auxent.x_csect.x_snstab);
- return true;
- }
- #endif
- /* Return FALSE to indicate that no special action was taken. */
- return false;
- }
- /*
- SUBSUBSECTION
- Writing relocations
- To write relocations, the back end steps though the
- canonical relocation table and create an
- @code{internal_reloc}. The symbol index to use is removed from
- the @code{offset} field in the symbol table supplied. The
- address comes directly from the sum of the section base
- address and the relocation offset; the type is dug directly
- from the howto field. Then the @code{internal_reloc} is
- swapped into the shape of an @code{external_reloc} and written
- out to disk.
- */
- #ifdef TARG_AUX
- /* AUX's ld wants relocations to be sorted. */
- static int
- compare_arelent_ptr (const void * x, const void * y)
- {
- const arelent **a = (const arelent **) x;
- const arelent **b = (const arelent **) y;
- bfd_size_type aadr = (*a)->address;
- bfd_size_type badr = (*b)->address;
- return (aadr < badr ? -1 : badr < aadr ? 1 : 0);
- }
- #endif /* TARG_AUX */
- static bool
- coff_write_relocs (bfd * abfd, int first_undef)
- {
- asection *s;
- for (s = abfd->sections; s != NULL; s = s->next)
- {
- unsigned int i;
- struct external_reloc dst;
- arelent **p;
- #ifndef TARG_AUX
- p = s->orelocation;
- #else
- {
- /* Sort relocations before we write them out. */
- bfd_size_type amt;
- amt = s->reloc_count;
- amt *= sizeof (arelent *);
- p = bfd_malloc (amt);
- if (p == NULL)
- {
- if (s->reloc_count > 0)
- return false;
- }
- else
- {
- memcpy (p, s->orelocation, (size_t) amt);
- qsort (p, s->reloc_count, sizeof (arelent *), compare_arelent_ptr);
- }
- }
- #endif
- if (bfd_seek (abfd, s->rel_filepos, SEEK_SET) != 0)
- return false;
- #ifdef COFF_WITH_EXTENDED_RELOC_COUNTER
- if ((obj_pe (abfd) || obj_go32 (abfd)) && s->reloc_count >= 0xffff)
- {
- /* Encode real count here as first reloc. */
- struct internal_reloc n;
- memset (& n, 0, sizeof (n));
- /* Add one to count *this* reloc (grr). */
- n.r_vaddr = s->reloc_count + 1;
- coff_swap_reloc_out (abfd, &n, &dst);
- if (bfd_bwrite (& dst, (bfd_size_type) bfd_coff_relsz (abfd),
- abfd) != bfd_coff_relsz (abfd))
- return false;
- }
- #endif
- for (i = 0; i < s->reloc_count; i++)
- {
- struct internal_reloc n;
- arelent *q = p[i];
- memset (& n, 0, sizeof (n));
- /* Now we've renumbered the symbols we know where the
- undefined symbols live in the table. Check the reloc
- entries for symbols who's output bfd isn't the right one.
- This is because the symbol was undefined (which means
- that all the pointers are never made to point to the same
- place). This is a bad thing,'cause the symbols attached
- to the output bfd are indexed, so that the relocation
- entries know which symbol index they point to. So we
- have to look up the output symbol here. */
- if (q->sym_ptr_ptr[0] != NULL && q->sym_ptr_ptr[0]->the_bfd != abfd)
- {
- int j;
- const char *sname = q->sym_ptr_ptr[0]->name;
- asymbol **outsyms = abfd->outsymbols;
- for (j = first_undef; outsyms[j]; j++)
- {
- const char *intable = outsyms[j]->name;
- if (strcmp (intable, sname) == 0)
- {
- /* Got a hit, so repoint the reloc. */
- q->sym_ptr_ptr = outsyms + j;
- break;
- }
- }
- }
- n.r_vaddr = q->address + s->vma;
- #ifdef R_IHCONST
- /* The 29k const/consth reloc pair is a real kludge. The consth
- part doesn't have a symbol; it has an offset. So rebuilt
- that here. */
- if (q->howto->type == R_IHCONST)
- n.r_symndx = q->addend;
- else
- #endif
- if (q->sym_ptr_ptr && q->sym_ptr_ptr[0] != NULL)
- {
- #ifdef SECTION_RELATIVE_ABSOLUTE_SYMBOL_P
- if (SECTION_RELATIVE_ABSOLUTE_SYMBOL_P (q, s))
- #else
- if ((*q->sym_ptr_ptr)->section == bfd_abs_section_ptr
- && ((*q->sym_ptr_ptr)->flags & BSF_SECTION_SYM) != 0)
- #endif
- /* This is a relocation relative to the absolute symbol. */
- n.r_symndx = -1;
- else
- {
- n.r_symndx = get_index ((*(q->sym_ptr_ptr)));
- /* Check to see if the symbol reloc points to a symbol
- we don't have in our symbol table. */
- if (n.r_symndx > obj_conv_table_size (abfd))
- {
- bfd_set_error (bfd_error_bad_value);
- /* xgettext:c-format */
- _bfd_error_handler (_("%pB: reloc against a non-existent"
- " symbol index: %ld"),
- abfd, n.r_symndx);
- return false;
- }
- }
- }
- #ifdef SWAP_OUT_RELOC_OFFSET
- n.r_offset = q->addend;
- #endif
- #ifdef SELECT_RELOC
- /* Work out reloc type from what is required. */
- SELECT_RELOC (n, q->howto);
- #else
- n.r_type = q->howto->type;
- #endif
- coff_swap_reloc_out (abfd, &n, &dst);
- if (bfd_bwrite (& dst, (bfd_size_type) bfd_coff_relsz (abfd),
- abfd) != bfd_coff_relsz (abfd))
- return false;
- }
- #ifdef TARG_AUX
- free (p);
- #endif
- }
- return true;
- }
- /* Set flags and magic number of a coff file from architecture and machine
- type. Result is TRUE if we can represent the arch&type, FALSE if not. */
- static bool
- coff_set_flags (bfd * abfd,
- unsigned int *magicp ATTRIBUTE_UNUSED,
- unsigned short *flagsp ATTRIBUTE_UNUSED)
- {
- switch (bfd_get_arch (abfd))
- {
- #ifdef Z80MAGIC
- case bfd_arch_z80:
- *magicp = Z80MAGIC;
- switch (bfd_get_mach (abfd))
- {
- case bfd_mach_z80strict:
- case bfd_mach_z80:
- case bfd_mach_z80n:
- case bfd_mach_z80full:
- case bfd_mach_r800:
- case bfd_mach_gbz80:
- case bfd_mach_z180:
- case bfd_mach_ez80_z80:
- case bfd_mach_ez80_adl:
- *flagsp = bfd_get_mach (abfd) << 12;
- break;
- default:
- return false;
- }
- return true;
- #endif
- #ifdef Z8KMAGIC
- case bfd_arch_z8k:
- *magicp = Z8KMAGIC;
- switch (bfd_get_mach (abfd))
- {
- case bfd_mach_z8001: *flagsp = F_Z8001; break;
- case bfd_mach_z8002: *flagsp = F_Z8002; break;
- default: return false;
- }
- return true;
- #endif
- #ifdef TIC30MAGIC
- case bfd_arch_tic30:
- *magicp = TIC30MAGIC;
- return true;
- #endif
- #ifdef TICOFF_DEFAULT_MAGIC
- case TICOFF_TARGET_ARCH:
- /* If there's no indication of which version we want, use the default. */
- if (!abfd->xvec )
- *magicp = TICOFF_DEFAULT_MAGIC;
- else
- {
- /* We may want to output in a different COFF version. */
- switch (abfd->xvec->name[4])
- {
- case '0':
- *magicp = TICOFF0MAGIC;
- break;
- case '1':
- *magicp = TICOFF1MAGIC;
- break;
- case '2':
- *magicp = TICOFF2MAGIC;
- break;
- default:
- return false;
- }
- }
- TICOFF_TARGET_MACHINE_SET (flagsp, bfd_get_mach (abfd));
- return true;
- #endif
- #ifdef AARCH64MAGIC
- case bfd_arch_aarch64:
- * magicp = AARCH64MAGIC;
- return true;
- #endif
- #ifdef ARMMAGIC
- case bfd_arch_arm:
- #ifdef ARM_WINCE
- * magicp = ARMPEMAGIC;
- #else
- * magicp = ARMMAGIC;
- #endif
- * flagsp = 0;
- if (APCS_SET (abfd))
- {
- if (APCS_26_FLAG (abfd))
- * flagsp |= F_APCS26;
- if (APCS_FLOAT_FLAG (abfd))
- * flagsp |= F_APCS_FLOAT;
- if (PIC_FLAG (abfd))
- * flagsp |= F_PIC;
- }
- if (INTERWORK_SET (abfd) && INTERWORK_FLAG (abfd))
- * flagsp |= F_INTERWORK;
- switch (bfd_get_mach (abfd))
- {
- case bfd_mach_arm_2: * flagsp |= F_ARM_2; break;
- case bfd_mach_arm_2a: * flagsp |= F_ARM_2a; break;
- case bfd_mach_arm_3: * flagsp |= F_ARM_3; break;
- case bfd_mach_arm_3M: * flagsp |= F_ARM_3M; break;
- case bfd_mach_arm_4: * flagsp |= F_ARM_4; break;
- case bfd_mach_arm_4T: * flagsp |= F_ARM_4T; break;
- case bfd_mach_arm_5: * flagsp |= F_ARM_5; break;
- /* FIXME: we do not have F_ARM vaues greater than F_ARM_5.
- See also the comment in coff_set_arch_mach_hook(). */
- case bfd_mach_arm_5T: * flagsp |= F_ARM_5; break;
- case bfd_mach_arm_5TE: * flagsp |= F_ARM_5; break;
- case bfd_mach_arm_XScale: * flagsp |= F_ARM_5; break;
- }
- return true;
- #endif
- #if defined(I386MAGIC) || defined(AMD64MAGIC)
- case bfd_arch_i386:
- #if defined(I386MAGIC)
- *magicp = I386MAGIC;
- #endif
- #if defined LYNXOS
- /* Just overwrite the usual value if we're doing Lynx. */
- *magicp = LYNXCOFFMAGIC;
- #endif
- #if defined AMD64MAGIC
- *magicp = AMD64MAGIC;
- #endif
- return true;
- #endif
- #ifdef IA64MAGIC
- case bfd_arch_ia64:
- *magicp = IA64MAGIC;
- return true;
- #endif
- #ifdef SH_ARCH_MAGIC_BIG
- case bfd_arch_sh:
- #ifdef COFF_IMAGE_WITH_PE
- *magicp = SH_ARCH_MAGIC_WINCE;
- #else
- if (bfd_big_endian (abfd))
- *magicp = SH_ARCH_MAGIC_BIG;
- else
- *magicp = SH_ARCH_MAGIC_LITTLE;
- #endif
- return true;
- #endif
- #ifdef MIPS_ARCH_MAGIC_WINCE
- case bfd_arch_mips:
- *magicp = MIPS_ARCH_MAGIC_WINCE;
- return true;
- #endif
- #ifdef SPARCMAGIC
- case bfd_arch_sparc:
- *magicp = SPARCMAGIC;
- #ifdef LYNXOS
- /* Just overwrite the usual value if we're doing Lynx. */
- *magicp = LYNXCOFFMAGIC;
- #endif
- return true;
- #endif
- #ifdef RS6000COFF_C
- case bfd_arch_rs6000:
- case bfd_arch_powerpc:
- BFD_ASSERT (bfd_get_flavour (abfd) == bfd_target_xcoff_flavour);
- *magicp = bfd_xcoff_magic_number (abfd);
- return true;
- #endif
- #ifdef MCOREMAGIC
- case bfd_arch_mcore:
- * magicp = MCOREMAGIC;
- return true;
- #endif
- default: /* Unknown architecture. */
- break;
- }
- return false;
- }
- static bool
- coff_set_arch_mach (bfd * abfd,
- enum bfd_architecture arch,
- unsigned long machine)
- {
- unsigned dummy1;
- unsigned short dummy2;
- if (! bfd_default_set_arch_mach (abfd, arch, machine))
- return false;
- if (arch != bfd_arch_unknown
- && ! coff_set_flags (abfd, &dummy1, &dummy2))
- return false; /* We can't represent this type. */
- return true; /* We're easy... */
- }
- #ifdef COFF_IMAGE_WITH_PE
- /* This is used to sort sections by VMA, as required by PE image
- files. */
- static int
- sort_by_secaddr (const void * arg1, const void * arg2)
- {
- const asection *a = *(const asection **) arg1;
- const asection *b = *(const asection **) arg2;
- if (a->vma < b->vma)
- return -1;
- else if (a->vma > b->vma)
- return 1;
- return 0;
- }
- #endif /* COFF_IMAGE_WITH_PE */
- /* Calculate the file position for each section. */
- #define ALIGN_SECTIONS_IN_FILE
- #ifdef TICOFF
- #undef ALIGN_SECTIONS_IN_FILE
- #endif
- static bool
- coff_compute_section_file_positions (bfd * abfd)
- {
- asection *current;
- file_ptr sofar = bfd_coff_filhsz (abfd);
- bool align_adjust;
- unsigned int target_index;
- #ifdef ALIGN_SECTIONS_IN_FILE
- asection *previous = NULL;
- file_ptr old_sofar;
- #endif
- #ifdef COFF_IMAGE_WITH_PE
- int page_size;
- if (coff_data (abfd)->link_info
- || (pe_data (abfd) && pe_data (abfd)->pe_opthdr.FileAlignment))
- {
- page_size = pe_data (abfd)->pe_opthdr.FileAlignment;
- /* If no file alignment has been set, default to one.
- This repairs 'ld -r' for arm-wince-pe target. */
- if (page_size == 0)
- page_size = 1;
- /* PR 17512: file: 0ac816d3. */
- if (page_size < 0)
- {
- bfd_set_error (bfd_error_file_too_big);
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%pB: page size is too large (0x%x)"), abfd, page_size);
- return false;
- }
- }
- else
- page_size = PE_DEF_FILE_ALIGNMENT;
- #else
- #ifdef COFF_PAGE_SIZE
- int page_size = COFF_PAGE_SIZE;
- #endif
- #endif
- #ifdef RS6000COFF_C
- /* On XCOFF, if we have symbols, set up the .debug section. */
- if (bfd_get_symcount (abfd) > 0)
- {
- bfd_size_type sz;
- bfd_size_type i, symcount;
- asymbol **symp;
- sz = 0;
- symcount = bfd_get_symcount (abfd);
- for (symp = abfd->outsymbols, i = 0; i < symcount; symp++, i++)
- {
- coff_symbol_type *cf;
- cf = coff_symbol_from (*symp);
- if (cf != NULL
- && cf->native != NULL
- && cf->native->is_sym
- && SYMNAME_IN_DEBUG (&cf->native->u.syment))
- {
- size_t len;
- len = strlen (bfd_asymbol_name (*symp));
- if (len > SYMNMLEN || bfd_coff_force_symnames_in_strings (abfd))
- sz += len + 1 + bfd_coff_debug_string_prefix_length (abfd);
- }
- }
- if (sz > 0)
- {
- asection *dsec;
- dsec = bfd_make_section_old_way (abfd, DOT_DEBUG);
- if (dsec == NULL)
- abort ();
- dsec->size = sz;
- dsec->flags |= SEC_HAS_CONTENTS;
- }
- }
- #endif
- if (bfd_get_start_address (abfd))
- /* A start address may have been added to the original file. In this
- case it will need an optional header to record it. */
- abfd->flags |= EXEC_P;
- if (abfd->flags & EXEC_P)
- sofar += bfd_coff_aoutsz (abfd);
- #ifdef RS6000COFF_C
- else if (xcoff_data (abfd)->full_aouthdr)
- sofar += bfd_coff_aoutsz (abfd);
- else
- sofar += SMALL_AOUTSZ;
- #endif
- sofar += abfd->section_count * bfd_coff_scnhsz (abfd);
- #ifdef RS6000COFF_C
- /* XCOFF handles overflows in the reloc and line number count fields
- by allocating a new section header to hold the correct counts. */
- for (current = abfd->sections; current != NULL; current = current->next)
- if (current->reloc_count >= 0xffff || current->lineno_count >= 0xffff)
- sofar += bfd_coff_scnhsz (abfd);
- #endif
- #ifdef COFF_IMAGE_WITH_PE
- {
- /* PE requires the sections to be in memory order when listed in
- the section headers. It also does not like empty loadable
- sections. The sections apparently do not have to be in the
- right order in the image file itself, but we do need to get the
- target_index values right. */
- unsigned int count;
- asection **section_list;
- unsigned int i;
- bfd_size_type amt;
- #ifdef COFF_PAGE_SIZE
- /* Clear D_PAGED if section alignment is smaller than
- COFF_PAGE_SIZE. */
- if (pe_data (abfd)->pe_opthdr.SectionAlignment < COFF_PAGE_SIZE)
- abfd->flags &= ~D_PAGED;
- #endif
- count = 0;
- for (current = abfd->sections; current != NULL; current = current->next)
- ++count;
- /* We allocate an extra cell to simplify the final loop. */
- amt = sizeof (struct asection *) * (count + 1);
- section_list = (asection **) bfd_malloc (amt);
- if (section_list == NULL)
- return false;
- i = 0;
- for (current = abfd->sections; current != NULL; current = current->next)
- {
- section_list[i] = current;
- ++i;
- }
- section_list[i] = NULL;
- qsort (section_list, count, sizeof (asection *), sort_by_secaddr);
- /* Rethread the linked list into sorted order; at the same time,
- assign target_index values. */
- target_index = 1;
- abfd->sections = NULL;
- abfd->section_last = NULL;
- for (i = 0; i < count; i++)
- {
- current = section_list[i];
- bfd_section_list_append (abfd, current);
- /* Later, if the section has zero size, we'll be throwing it
- away, so we don't want to number it now. Note that having
- a zero size and having real contents are different
- concepts: .bss has no contents, but (usually) non-zero
- size. */
- if (current->size == 0)
- {
- /* Discard. However, it still might have (valid) symbols
- in it, so arbitrarily set it to section 1 (indexing is
- 1-based here; usually .text). __end__ and other
- contents of .endsection really have this happen.
- FIXME: This seems somewhat dubious. */
- current->target_index = 1;
- }
- else
- current->target_index = target_index++;
- }
- free (section_list);
- }
- #else /* ! COFF_IMAGE_WITH_PE */
- {
- /* Set the target_index field. */
- target_index = 1;
- for (current = abfd->sections; current != NULL; current = current->next)
- current->target_index = target_index++;
- }
- #endif /* ! COFF_IMAGE_WITH_PE */
- if (target_index >= bfd_coff_max_nscns (abfd))
- {
- bfd_set_error (bfd_error_file_too_big);
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%pB: too many sections (%d)"), abfd, target_index);
- return false;
- }
- align_adjust = false;
- for (current = abfd->sections;
- current != NULL;
- current = current->next)
- {
- #ifdef COFF_IMAGE_WITH_PE
- /* With PE we have to pad each section to be a multiple of its
- page size too, and remember both sizes. */
- if (coff_section_data (abfd, current) == NULL)
- {
- size_t amt = sizeof (struct coff_section_tdata);
- current->used_by_bfd = bfd_zalloc (abfd, amt);
- if (current->used_by_bfd == NULL)
- return false;
- }
- if (pei_section_data (abfd, current) == NULL)
- {
- size_t amt = sizeof (struct pei_section_tdata);
- coff_section_data (abfd, current)->tdata = bfd_zalloc (abfd, amt);
- if (coff_section_data (abfd, current)->tdata == NULL)
- return false;
- }
- if (pei_section_data (abfd, current)->virt_size == 0)
- pei_section_data (abfd, current)->virt_size = current->size;
- #endif
- /* Only deal with sections which have contents. */
- if (!(current->flags & SEC_HAS_CONTENTS))
- continue;
- current->rawsize = current->size;
- #ifdef COFF_IMAGE_WITH_PE
- /* Make sure we skip empty sections in a PE image. */
- if (current->size == 0)
- continue;
- #endif
- /* Align the sections in the file to the same boundary on
- which they are aligned in virtual memory. */
- #ifdef ALIGN_SECTIONS_IN_FILE
- if ((abfd->flags & EXEC_P) != 0)
- {
- /* Make sure this section is aligned on the right boundary - by
- padding the previous section up if necessary. */
- old_sofar = sofar;
- sofar = BFD_ALIGN (sofar, 1 << current->alignment_power);
- #ifdef RS6000COFF_C
- /* Make sure the file offset and the vma of .text/.data are at the
- same page offset, so that the file can be mmap'ed without being
- relocated. Failing that, AIX is able to load and execute the
- program, but it will be silently relocated (possible as
- executables are PIE). But the relocation is slightly costly and
- complexify the use of addr2line or gdb. So better to avoid it,
- like does the native linker. Usually gnu ld makes sure that
- the vma of .text is the file offset so this issue shouldn't
- appear unless you are stripping such an executable.
- AIX loader checks the text section alignment of (vma - filepos),
- and the native linker doesn't try to align the text sections.
- For example:
- 0 .text 000054cc 10000128 10000128 00000128 2**5
- CONTENTS, ALLOC, LOAD, CODE
- Don't perform the above tweak if the previous one is .tdata,
- as it will increase the memory allocated for every threads
- created and not just improve performances with gdb.
- */
- if ((!strcmp (current->name, _TEXT)
- || !strcmp (current->name, _DATA))
- && (previous == NULL || strcmp(previous->name, _TDATA)))
- {
- bfd_vma align = 4096;
- bfd_vma sofar_off = sofar % align;
- bfd_vma vma_off = current->vma % align;
- if (vma_off > sofar_off)
- sofar += vma_off - sofar_off;
- else if (vma_off < sofar_off)
- sofar += align + vma_off - sofar_off;
- }
- #endif
- if (previous != NULL)
- previous->size += sofar - old_sofar;
- }
- #endif
- /* In demand paged files the low order bits of the file offset
- must match the low order bits of the virtual address. */
- #ifdef COFF_PAGE_SIZE
- if ((abfd->flags & D_PAGED) != 0
- && (current->flags & SEC_ALLOC) != 0)
- sofar += (current->vma - (bfd_vma) sofar) % page_size;
- #endif
- current->filepos = sofar;
- #ifdef COFF_IMAGE_WITH_PE
- /* Set the padded size. */
- current->size = (current->size + page_size - 1) & -page_size;
- #endif
- sofar += current->size;
- #ifdef ALIGN_SECTIONS_IN_FILE
- /* Make sure that this section is of the right size too. */
- if ((abfd->flags & EXEC_P) == 0)
- {
- bfd_size_type old_size;
- old_size = current->size;
- current->size = BFD_ALIGN (current->size,
- 1 << current->alignment_power);
- align_adjust = current->size != old_size;
- sofar += current->size - old_size;
- }
- else
- {
- old_sofar = sofar;
- sofar = BFD_ALIGN (sofar, 1 << current->alignment_power);
- align_adjust = sofar != old_sofar;
- current->size += sofar - old_sofar;
- }
- #endif
- #ifdef COFF_IMAGE_WITH_PE
- /* For PE we need to make sure we pad out to the aligned
- size, in case the caller only writes out data to the
- unaligned size. */
- if (pei_section_data (abfd, current)->virt_size < current->size)
- align_adjust = true;
- #endif
- #ifdef _LIB
- /* Force .lib sections to start at zero. The vma is then
- incremented in coff_set_section_contents. This is right for
- SVR3.2. */
- if (strcmp (current->name, _LIB) == 0)
- bfd_set_section_vma (current, 0);
- #endif
- #ifdef ALIGN_SECTIONS_IN_FILE
- previous = current;
- #endif
- }
- /* It is now safe to write to the output file. If we needed an
- alignment adjustment for the last section, then make sure that
- there is a byte at offset sofar. If there are no symbols and no
- relocs, then nothing follows the last section. If we don't force
- the last byte out, then the file may appear to be truncated. */
- if (align_adjust)
- {
- bfd_byte b;
- b = 0;
- if (bfd_seek (abfd, sofar - 1, SEEK_SET) != 0
- || bfd_bwrite (&b, (bfd_size_type) 1, abfd) != 1)
- return false;
- }
- /* Make sure the relocations are aligned. We don't need to make
- sure that this byte exists, because it will only matter if there
- really are relocs. */
- sofar = BFD_ALIGN (sofar, 1 << COFF_DEFAULT_SECTION_ALIGNMENT_POWER);
- obj_relocbase (abfd) = sofar;
- abfd->output_has_begun = true;
- return true;
- }
- #ifdef COFF_IMAGE_WITH_PE
- static bool
- coff_read_word (bfd *abfd, unsigned int *value, unsigned int *pelength)
- {
- unsigned char b[2];
- int status;
- status = bfd_bread (b, (bfd_size_type) 2, abfd);
- if (status < 1)
- {
- *value = 0;
- return false;
- }
- if (status == 1)
- *value = (unsigned int) b[0];
- else
- *value = (unsigned int) (b[0] + (b[1] << 8));
- *pelength += status;
- return true;
- }
- static unsigned int
- coff_compute_checksum (bfd *abfd, unsigned int *pelength)
- {
- bool more_data;
- file_ptr filepos;
- unsigned int value;
- unsigned int total;
- total = 0;
- *pelength = 0;
- filepos = (file_ptr) 0;
- do
- {
- if (bfd_seek (abfd, filepos, SEEK_SET) != 0)
- return 0;
- more_data = coff_read_word (abfd, &value, pelength);
- total += value;
- total = 0xffff & (total + (total >> 0x10));
- filepos += 2;
- }
- while (more_data);
- return (0xffff & (total + (total >> 0x10)));
- }
- static bool
- coff_apply_checksum (bfd *abfd)
- {
- unsigned int computed;
- unsigned int checksum = 0;
- unsigned int peheader;
- unsigned int pelength;
- if (bfd_seek (abfd, 0x3c, SEEK_SET) != 0)
- return false;
- if (!coff_read_word (abfd, &peheader, &pelength))
- return false;
- if (bfd_seek (abfd, peheader + 0x58, SEEK_SET) != 0)
- return false;
- checksum = 0;
- bfd_bwrite (&checksum, (bfd_size_type) 4, abfd);
- if (bfd_seek (abfd, peheader, SEEK_SET) != 0)
- return false;
- computed = coff_compute_checksum (abfd, &pelength);
- checksum = computed + pelength;
- if (bfd_seek (abfd, peheader + 0x58, SEEK_SET) != 0)
- return false;
- bfd_bwrite (&checksum, (bfd_size_type) 4, abfd);
- return true;
- }
- #endif /* COFF_IMAGE_WITH_PE */
- static bool
- coff_write_object_contents (bfd * abfd)
- {
- asection *current;
- bool hasrelocs = false;
- bool haslinno = false;
- #ifdef COFF_IMAGE_WITH_PE
- bool hasdebug = false;
- #endif
- file_ptr scn_base;
- file_ptr reloc_base;
- file_ptr lineno_base;
- file_ptr sym_base;
- unsigned long reloc_size = 0, reloc_count = 0;
- unsigned long lnno_size = 0;
- bool long_section_names;
- asection *text_sec = NULL;
- asection *data_sec = NULL;
- asection *bss_sec = NULL;
- #ifdef RS6000COFF_C
- asection *tdata_sec = NULL;
- asection *tbss_sec = NULL;
- #endif
- struct internal_filehdr internal_f;
- struct internal_aouthdr internal_a;
- #ifdef COFF_LONG_SECTION_NAMES
- size_t string_size = STRING_SIZE_SIZE;
- #endif
- bfd_set_error (bfd_error_system_call);
- /* Make a pass through the symbol table to count line number entries and
- put them into the correct asections. */
- lnno_size = coff_count_linenumbers (abfd) * bfd_coff_linesz (abfd);
- if (! abfd->output_has_begun)
- {
- if (! coff_compute_section_file_positions (abfd))
- return false;
- }
- reloc_base = obj_relocbase (abfd);
- /* Work out the size of the reloc and linno areas. */
- for (current = abfd->sections; current != NULL; current =
- current->next)
- {
- #ifdef COFF_WITH_EXTENDED_RELOC_COUNTER
- /* We store the actual reloc count in the first reloc's addr. */
- if ((obj_pe (abfd) || obj_go32 (abfd)) && current->reloc_count >= 0xffff)
- reloc_count ++;
- #endif
- reloc_count += current->reloc_count;
- }
- reloc_size = reloc_count * bfd_coff_relsz (abfd);
- lineno_base = reloc_base + reloc_size;
- sym_base = lineno_base + lnno_size;
- /* Indicate in each section->line_filepos its actual file address. */
- for (current = abfd->sections; current != NULL; current =
- current->next)
- {
- if (current->lineno_count)
- {
- current->line_filepos = lineno_base;
- current->moving_line_filepos = lineno_base;
- lineno_base += current->lineno_count * bfd_coff_linesz (abfd);
- }
- else
- current->line_filepos = 0;
- if (current->reloc_count)
- {
- current->rel_filepos = reloc_base;
- reloc_base += current->reloc_count * bfd_coff_relsz (abfd);
- #ifdef COFF_WITH_EXTENDED_RELOC_COUNTER
- /* Extra reloc to hold real count. */
- if ((obj_pe (abfd) || obj_go32 (abfd)) && current->reloc_count >= 0xffff)
- reloc_base += bfd_coff_relsz (abfd);
- #endif
- }
- else
- current->rel_filepos = 0;
- }
- /* Write section headers to the file. */
- internal_f.f_nscns = 0;
- if ((abfd->flags & EXEC_P) != 0)
- scn_base = bfd_coff_filhsz (abfd) + bfd_coff_aoutsz (abfd);
- else
- {
- scn_base = bfd_coff_filhsz (abfd);
- #ifdef RS6000COFF_C
- #ifndef XCOFF64
- if (xcoff_data (abfd)->full_aouthdr)
- scn_base += bfd_coff_aoutsz (abfd);
- else
- scn_base += SMALL_AOUTSZ;
- #endif
- #endif
- }
- if (bfd_seek (abfd, scn_base, SEEK_SET) != 0)
- return false;
- long_section_names = false;
- for (current = abfd->sections;
- current != NULL;
- current = current->next)
- {
- struct internal_scnhdr section;
- #ifdef COFF_IMAGE_WITH_PE
- bool is_reloc_section = false;
- if (strcmp (current->name, DOT_RELOC) == 0)
- {
- is_reloc_section = true;
- hasrelocs = true;
- pe_data (abfd)->has_reloc_section = 1;
- }
- #endif
- internal_f.f_nscns++;
- strncpy (section.s_name, current->name, SCNNMLEN);
- #ifdef COFF_LONG_SECTION_NAMES
- /* Handle long section names as in PE. This must be compatible
- with the code in coff_write_symbols and _bfd_coff_final_link. */
- if (bfd_coff_long_section_names (abfd))
- {
- size_t len;
- len = strlen (current->name);
- if (len > SCNNMLEN)
- {
- /* The s_name field is defined to be NUL-padded but need not be
- NUL-terminated. We use a temporary buffer so that we can still
- sprintf all eight chars without splatting a terminating NUL
- over the first byte of the following member (s_paddr). */
- /* PR 21096: The +20 is to stop a bogus warning from gcc7 about
- a possible buffer overflow. */
- char s_name_buf[SCNNMLEN + 1 + 20];
- /* An inherent limitation of the /nnnnnnn notation used to indicate
- the offset of the long name in the string table is that we
- cannot address entries beyone the ten million byte boundary. */
- if (string_size >= 10000000)
- {
- bfd_set_error (bfd_error_file_too_big);
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%pB: section %pA: string table overflow at offset %ld"),
- abfd, current, (unsigned long) string_size);
- return false;
- }
- /* We do not need to use snprintf here as we have already verfied
- that string_size is not too big, plus we have an overlarge
- buffer, just in case. */
- sprintf (s_name_buf, "/%lu", (unsigned long) string_size);
- /* Then strncpy takes care of any padding for us. */
- strncpy (section.s_name, s_name_buf, SCNNMLEN);
- string_size += len + 1;
- long_section_names = true;
- }
- }
- #endif
- #ifdef _LIB
- /* Always set s_vaddr of .lib to 0. This is right for SVR3.2
- Ian Taylor <ian@cygnus.com>. */
- if (strcmp (current->name, _LIB) == 0)
- section.s_vaddr = 0;
- else
- #endif
- section.s_vaddr = current->vma;
- section.s_paddr = current->lma;
- section.s_size = current->size;
- #ifdef coff_get_section_load_page
- section.s_page = coff_get_section_load_page (current);
- #else
- section.s_page = 0;
- #endif
- #ifdef COFF_WITH_PE
- section.s_paddr = 0;
- #endif
- #ifdef COFF_IMAGE_WITH_PE
- /* Reminder: s_paddr holds the virtual size of the section. */
- if (coff_section_data (abfd, current) != NULL
- && pei_section_data (abfd, current) != NULL)
- section.s_paddr = pei_section_data (abfd, current)->virt_size;
- else
- section.s_paddr = 0;
- #endif
- /* If this section has no size or is unloadable then the scnptr
- will be 0 too. */
- if (current->size == 0
- || (current->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
- section.s_scnptr = 0;
- else
- section.s_scnptr = current->filepos;
- section.s_relptr = current->rel_filepos;
- section.s_lnnoptr = current->line_filepos;
- section.s_nreloc = current->reloc_count;
- section.s_nlnno = current->lineno_count;
- #ifndef COFF_IMAGE_WITH_PE
- /* In PEI, relocs come in the .reloc section. */
- if (current->reloc_count != 0)
- hasrelocs = true;
- #endif
- if (current->lineno_count != 0)
- haslinno = true;
- #ifdef COFF_IMAGE_WITH_PE
- if ((current->flags & SEC_DEBUGGING) != 0
- && ! is_reloc_section)
- hasdebug = true;
- #endif
- #ifdef RS6000COFF_C
- #ifndef XCOFF64
- /* Indicate the use of an XCOFF overflow section header. */
- if (current->reloc_count >= 0xffff || current->lineno_count >= 0xffff)
- {
- section.s_nreloc = 0xffff;
- section.s_nlnno = 0xffff;
- }
- #endif
- #endif
- section.s_flags = sec_to_styp_flags (current->name, current->flags);
- if (!strcmp (current->name, _TEXT))
- text_sec = current;
- else if (!strcmp (current->name, _DATA))
- data_sec = current;
- else if (!strcmp (current->name, _BSS))
- bss_sec = current;
- #ifdef RS6000COFF_C
- else if (!strcmp (current->name, _TDATA))
- tdata_sec = current;
- else if (!strcmp (current->name, _TBSS))
- tbss_sec = current;
- #endif
- #ifdef COFF_ENCODE_ALIGNMENT
- if (COFF_ENCODE_ALIGNMENT (abfd, section, current->alignment_power)
- && (COFF_DECODE_ALIGNMENT (section.s_flags)
- != current->alignment_power))
- {
- bool warn = (coff_data (abfd)->link_info
- && !bfd_link_relocatable (coff_data (abfd)->link_info));
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%pB:%s section %s: alignment 2**%u not representable"),
- abfd, warn ? " warning:" : "", current->name,
- current->alignment_power);
- if (!warn)
- {
- bfd_set_error (bfd_error_nonrepresentable_section);
- return false;
- }
- }
- #endif
- #ifdef COFF_IMAGE_WITH_PE
- /* Suppress output of the sections if they are null. ld
- includes the bss and data sections even if there is no size
- assigned to them. NT loader doesn't like it if these section
- headers are included if the sections themselves are not
- needed. See also coff_compute_section_file_positions. */
- if (section.s_size == 0)
- internal_f.f_nscns--;
- else
- #endif
- {
- SCNHDR buff;
- bfd_size_type amt = bfd_coff_scnhsz (abfd);
- if (bfd_coff_swap_scnhdr_out (abfd, §ion, &buff) == 0
- || bfd_bwrite (& buff, amt, abfd) != amt)
- return false;
- }
- #ifdef COFF_WITH_PE
- /* PE stores COMDAT section information in the symbol table. If
- this section is supposed to have some COMDAT info, track down
- the symbol in the symbol table and modify it. */
- if ((current->flags & SEC_LINK_ONCE) != 0)
- {
- unsigned int i, count;
- asymbol **psym;
- coff_symbol_type *csym = NULL;
- asymbol **psymsec;
- psymsec = NULL;
- count = bfd_get_symcount (abfd);
- for (i = 0, psym = abfd->outsymbols; i < count; i++, psym++)
- {
- if ((*psym)->section != current)
- continue;
- /* Remember the location of the first symbol in this
- section. */
- if (psymsec == NULL)
- psymsec = psym;
- /* See if this is the section symbol. */
- if (strcmp ((*psym)->name, current->name) == 0)
- {
- csym = coff_symbol_from (*psym);
- if (csym == NULL
- || csym->native == NULL
- || ! csym->native->is_sym
- || csym->native->u.syment.n_numaux < 1
- || csym->native->u.syment.n_sclass != C_STAT
- || csym->native->u.syment.n_type != T_NULL)
- continue;
- /* Here *PSYM is the section symbol for CURRENT. */
- break;
- }
- }
- /* Did we find it?
- Note that we might not if we're converting the file from
- some other object file format. */
- if (i < count)
- {
- combined_entry_type *aux;
- /* We don't touch the x_checksum field. The
- x_associated field is not currently supported. */
- aux = csym->native + 1;
- BFD_ASSERT (! aux->is_sym);
- switch (current->flags & SEC_LINK_DUPLICATES)
- {
- case SEC_LINK_DUPLICATES_DISCARD:
- aux->u.auxent.x_scn.x_comdat = IMAGE_COMDAT_SELECT_ANY;
- break;
- case SEC_LINK_DUPLICATES_ONE_ONLY:
- aux->u.auxent.x_scn.x_comdat =
- IMAGE_COMDAT_SELECT_NODUPLICATES;
- break;
- case SEC_LINK_DUPLICATES_SAME_SIZE:
- aux->u.auxent.x_scn.x_comdat =
- IMAGE_COMDAT_SELECT_SAME_SIZE;
- break;
- case SEC_LINK_DUPLICATES_SAME_CONTENTS:
- aux->u.auxent.x_scn.x_comdat =
- IMAGE_COMDAT_SELECT_EXACT_MATCH;
- break;
- }
- /* The COMDAT symbol must be the first symbol from this
- section in the symbol table. In order to make this
- work, we move the COMDAT symbol before the first
- symbol we found in the search above. It's OK to
- rearrange the symbol table at this point, because
- coff_renumber_symbols is going to rearrange it
- further and fix up all the aux entries. */
- if (psym != psymsec)
- {
- asymbol *hold;
- asymbol **pcopy;
- hold = *psym;
- for (pcopy = psym; pcopy > psymsec; pcopy--)
- pcopy[0] = pcopy[-1];
- *psymsec = hold;
- }
- }
- }
- #endif /* COFF_WITH_PE */
- }
- #ifdef RS6000COFF_C
- #ifndef XCOFF64
- /* XCOFF handles overflows in the reloc and line number count fields
- by creating a new section header to hold the correct values. */
- for (current = abfd->sections; current != NULL; current = current->next)
- {
- if (current->reloc_count >= 0xffff || current->lineno_count >= 0xffff)
- {
- struct internal_scnhdr scnhdr;
- SCNHDR buff;
- bfd_size_type amt;
- internal_f.f_nscns++;
- memcpy (scnhdr.s_name, ".ovrflo", 8);
- scnhdr.s_paddr = current->reloc_count;
- scnhdr.s_vaddr = current->lineno_count;
- scnhdr.s_size = 0;
- scnhdr.s_scnptr = 0;
- scnhdr.s_relptr = current->rel_filepos;
- scnhdr.s_lnnoptr = current->line_filepos;
- scnhdr.s_nreloc = current->target_index;
- scnhdr.s_nlnno = current->target_index;
- scnhdr.s_flags = STYP_OVRFLO;
- amt = bfd_coff_scnhsz (abfd);
- if (bfd_coff_swap_scnhdr_out (abfd, &scnhdr, &buff) == 0
- || bfd_bwrite (& buff, amt, abfd) != amt)
- return false;
- }
- }
- #endif
- #endif
- #if defined (COFF_GO32_EXE) || defined (COFF_GO32)
- /* Pad section headers. */
- if ((abfd->flags & EXEC_P) && abfd->sections != NULL)
- {
- file_ptr cur_ptr = scn_base
- + abfd->section_count * bfd_coff_scnhsz (abfd);
- long fill_size = (abfd->sections->filepos - cur_ptr);
- bfd_byte *b = bfd_zmalloc (fill_size);
- if (b)
- {
- bfd_bwrite ((PTR)b, fill_size, abfd);
- free (b);
- }
- }
- #endif
- /* OK, now set up the filehdr... */
- /* Don't include the internal abs section in the section count */
- /* We will NOT put a fucking timestamp in the header here. Every time you
- put it back, I will come in and take it out again. I'm sorry. This
- field does not belong here. We fill it with a 0 so it compares the
- same but is not a reasonable time. -- gnu@cygnus.com */
- internal_f.f_timdat = 0;
- internal_f.f_flags = 0;
- if (abfd->flags & EXEC_P)
- internal_f.f_opthdr = bfd_coff_aoutsz (abfd);
- else
- {
- internal_f.f_opthdr = 0;
- #ifdef RS6000COFF_C
- #ifndef XCOFF64
- if (xcoff_data (abfd)->full_aouthdr)
- internal_f.f_opthdr = bfd_coff_aoutsz (abfd);
- else
- internal_f.f_opthdr = SMALL_AOUTSZ;
- #endif
- #endif
- }
- if (!hasrelocs)
- internal_f.f_flags |= F_RELFLG;
- if (!haslinno)
- internal_f.f_flags |= F_LNNO;
- if (abfd->flags & EXEC_P)
- internal_f.f_flags |= F_EXEC;
- #ifdef COFF_IMAGE_WITH_PE
- if (! hasdebug)
- internal_f.f_flags |= IMAGE_FILE_DEBUG_STRIPPED;
- if (pe_data (abfd)->real_flags & IMAGE_FILE_LARGE_ADDRESS_AWARE)
- internal_f.f_flags |= IMAGE_FILE_LARGE_ADDRESS_AWARE;
- #endif
- #if !defined(COFF_WITH_pex64) && !defined(COFF_WITH_peAArch64)
- #ifdef COFF_WITH_PE
- internal_f.f_flags |= IMAGE_FILE_32BIT_MACHINE;
- #else
- if (bfd_little_endian (abfd))
- internal_f.f_flags |= F_AR32WR;
- else
- internal_f.f_flags |= F_AR32W;
- #endif
- #endif
- #ifdef TI_TARGET_ID
- /* Target id is used in TI COFF v1 and later; COFF0 won't use this field,
- but it doesn't hurt to set it internally. */
- internal_f.f_target_id = TI_TARGET_ID;
- #endif
- /* FIXME, should do something about the other byte orders and
- architectures. */
- #ifdef RS6000COFF_C
- if ((abfd->flags & DYNAMIC) != 0)
- internal_f.f_flags |= F_SHROBJ;
- if (bfd_get_section_by_name (abfd, _LOADER) != NULL)
- internal_f.f_flags |= F_DYNLOAD;
- #endif
- memset (&internal_a, 0, sizeof internal_a);
- /* Set up architecture-dependent stuff. */
- {
- unsigned int magic = 0;
- unsigned short flags = 0;
- coff_set_flags (abfd, &magic, &flags);
- internal_f.f_magic = magic;
- internal_f.f_flags |= flags;
- /* ...and the "opt"hdr... */
- #ifdef TICOFF_AOUT_MAGIC
- internal_a.magic = TICOFF_AOUT_MAGIC;
- #define __A_MAGIC_SET__
- #endif
- #if defined(ARM)
- #define __A_MAGIC_SET__
- internal_a.magic = ZMAGIC;
- #endif
- #if defined(AARCH64)
- #define __A_MAGIC_SET__
- internal_a.magic = ZMAGIC;
- #endif
- #if defined MCORE_PE
- #define __A_MAGIC_SET__
- internal_a.magic = IMAGE_NT_OPTIONAL_HDR_MAGIC;
- #endif
- #if defined(I386)
- #define __A_MAGIC_SET__
- #if defined LYNXOS
- internal_a.magic = LYNXCOFFMAGIC;
- #elif defined AMD64
- internal_a.magic = IMAGE_NT_OPTIONAL_HDR64_MAGIC;
- #else
- internal_a.magic = ZMAGIC;
- #endif
- #endif /* I386 */
- #if defined(IA64)
- #define __A_MAGIC_SET__
- internal_a.magic = PE32PMAGIC;
- #endif /* IA64 */
- #if defined(SPARC)
- #define __A_MAGIC_SET__
- #if defined(LYNXOS)
- internal_a.magic = LYNXCOFFMAGIC;
- #endif /* LYNXOS */
- #endif /* SPARC */
- #ifdef RS6000COFF_C
- #define __A_MAGIC_SET__
- internal_a.magic = (abfd->flags & D_PAGED) ? RS6K_AOUTHDR_ZMAGIC :
- (abfd->flags & WP_TEXT) ? RS6K_AOUTHDR_NMAGIC :
- RS6K_AOUTHDR_OMAGIC;
- #endif
- #if defined(SH) && defined(COFF_WITH_PE)
- #define __A_MAGIC_SET__
- internal_a.magic = SH_PE_MAGIC;
- #endif
- #if defined(MIPS) && defined(COFF_WITH_PE)
- #define __A_MAGIC_SET__
- internal_a.magic = MIPS_PE_MAGIC;
- #endif
- #ifndef __A_MAGIC_SET__
- #include "Your aouthdr magic number is not being set!"
- #else
- #undef __A_MAGIC_SET__
- #endif
- }
- #ifdef RS6000COFF_C
- /* XCOFF 32bit needs this to have new behaviour for n_type field. */
- internal_a.vstamp = 2;
- #else
- /* FIXME: Does anybody ever set this to another value? */
- internal_a.vstamp = 0;
- #endif
- /* Now should write relocs, strings, syms. */
- obj_sym_filepos (abfd) = sym_base;
- if (bfd_get_symcount (abfd) != 0)
- {
- int firstundef;
- if (!coff_renumber_symbols (abfd, &firstundef))
- return false;
- coff_mangle_symbols (abfd);
- if (! coff_write_symbols (abfd))
- return false;
- if (! coff_write_linenumbers (abfd))
- return false;
- if (! coff_write_relocs (abfd, firstundef))
- return false;
- }
- #ifdef COFF_LONG_SECTION_NAMES
- else if (long_section_names && ! obj_coff_strings_written (abfd))
- {
- /* If we have long section names we have to write out the string
- table even if there are no symbols. */
- if (! coff_write_symbols (abfd))
- return false;
- }
- #endif
- /* If bfd_get_symcount (abfd) != 0, then we are not using the COFF
- backend linker, and obj_raw_syment_count is not valid until after
- coff_write_symbols is called. */
- if (obj_raw_syment_count (abfd) != 0)
- {
- internal_f.f_symptr = sym_base;
- #ifdef RS6000COFF_C
- /* AIX appears to require that F_RELFLG not be set if there are
- local symbols but no relocations. */
- internal_f.f_flags &=~ F_RELFLG;
- #endif
- }
- else
- {
- if (long_section_names)
- internal_f.f_symptr = sym_base;
- else
- internal_f.f_symptr = 0;
- internal_f.f_flags |= F_LSYMS;
- }
- if (text_sec)
- {
- internal_a.tsize = text_sec->size;
- internal_a.text_start = internal_a.tsize ? text_sec->vma : 0;
- }
- if (data_sec)
- {
- internal_a.dsize = data_sec->size;
- internal_a.data_start = internal_a.dsize ? data_sec->vma : 0;
- }
- if (bss_sec)
- {
- internal_a.bsize = bss_sec->size;
- if (internal_a.bsize && bss_sec->vma < internal_a.data_start)
- internal_a.data_start = bss_sec->vma;
- }
- internal_a.entry = bfd_get_start_address (abfd);
- internal_f.f_nsyms = obj_raw_syment_count (abfd);
- #ifdef RS6000COFF_C
- if (xcoff_data (abfd)->full_aouthdr)
- {
- bfd_vma toc;
- asection *loader_sec;
- internal_a.vstamp = 2;
- internal_a.o_snentry = xcoff_data (abfd)->snentry;
- if (internal_a.o_snentry == 0)
- internal_a.entry = (bfd_vma) -1;
- if (text_sec != NULL)
- {
- internal_a.o_sntext = text_sec->target_index;
- internal_a.o_algntext = bfd_section_alignment (text_sec);
- }
- else
- {
- internal_a.o_sntext = 0;
- internal_a.o_algntext = 0;
- }
- if (data_sec != NULL)
- {
- internal_a.o_sndata = data_sec->target_index;
- internal_a.o_algndata = bfd_section_alignment (data_sec);
- }
- else
- {
- internal_a.o_sndata = 0;
- internal_a.o_algndata = 0;
- }
- loader_sec = bfd_get_section_by_name (abfd, ".loader");
- if (loader_sec != NULL)
- internal_a.o_snloader = loader_sec->target_index;
- else
- internal_a.o_snloader = 0;
- if (bss_sec != NULL)
- internal_a.o_snbss = bss_sec->target_index;
- else
- internal_a.o_snbss = 0;
- if (tdata_sec != NULL)
- {
- internal_a.o_sntdata = tdata_sec->target_index;
- /* TODO: o_flags should be set to RS6K_AOUTHDR_TLS_LE
- if there is at least one R_TLS_LE relocations. */
- internal_a.o_flags = 0;
- #ifdef XCOFF64
- internal_a.o_x64flags = 0;
- #endif
- }
- else
- {
- internal_a.o_sntdata = 0;
- internal_a.o_flags = 0;
- #ifdef XCOFF64
- internal_a.o_x64flags = 0;
- #endif
- }
- if (tbss_sec != NULL)
- internal_a.o_sntbss = tbss_sec->target_index;
- else
- internal_a.o_sntbss = 0;
- toc = xcoff_data (abfd)->toc;
- internal_a.o_toc = toc;
- internal_a.o_sntoc = xcoff_data (abfd)->sntoc;
- internal_a.o_modtype = xcoff_data (abfd)->modtype;
- if (xcoff_data (abfd)->cputype != -1)
- internal_a.o_cputype = xcoff_data (abfd)->cputype;
- else
- {
- switch (bfd_get_arch (abfd))
- {
- case bfd_arch_rs6000:
- internal_a.o_cputype = 4;
- break;
- case bfd_arch_powerpc:
- if (bfd_get_mach (abfd) == bfd_mach_ppc)
- internal_a.o_cputype = 3;
- else if (bfd_get_mach (abfd) == bfd_mach_ppc_620)
- internal_a.o_cputype = 2;
- else
- internal_a.o_cputype = 1;
- break;
- default:
- abort ();
- }
- }
- internal_a.o_maxstack = xcoff_data (abfd)->maxstack;
- internal_a.o_maxdata = xcoff_data (abfd)->maxdata;
- }
- #endif
- #ifdef COFF_WITH_PE
- {
- /* After object contents are finalized so we can compute a reasonable hash,
- but before header is written so we can update it to point to debug directory. */
- struct pe_tdata *pe = pe_data (abfd);
- if (pe->build_id.after_write_object_contents != NULL)
- (*pe->build_id.after_write_object_contents) (abfd);
- }
- #endif
- /* Now write header. */
- if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0)
- return false;
- {
- char * buff;
- bfd_size_type amount = bfd_coff_filhsz (abfd);
- buff = (char *) bfd_malloc (amount);
- if (buff == NULL)
- return false;
- bfd_coff_swap_filehdr_out (abfd, & internal_f, buff);
- amount = bfd_bwrite (buff, amount, abfd);
- free (buff);
- if (amount != bfd_coff_filhsz (abfd))
- return false;
- }
- if (abfd->flags & EXEC_P)
- {
- /* Note that peicode.h fills in a PEAOUTHDR, not an AOUTHDR.
- include/coff/pe.h sets AOUTSZ == sizeof (PEAOUTHDR)). */
- char * buff;
- bfd_size_type amount = bfd_coff_aoutsz (abfd);
- buff = (char *) bfd_malloc (amount);
- if (buff == NULL)
- return false;
- coff_swap_aouthdr_out (abfd, & internal_a, buff);
- amount = bfd_bwrite (buff, amount, abfd);
- free (buff);
- if (amount != bfd_coff_aoutsz (abfd))
- return false;
- #ifdef COFF_IMAGE_WITH_PE
- if (! coff_apply_checksum (abfd))
- return false;
- #endif
- }
- #ifdef RS6000COFF_C
- #ifndef XCOFF64
- else
- {
- AOUTHDR buff;
- size_t size;
- /* XCOFF32 seems to always write at least a small a.out header. */
- coff_swap_aouthdr_out (abfd, & internal_a, & buff);
- if (xcoff_data (abfd)->full_aouthdr)
- size = bfd_coff_aoutsz (abfd);
- else
- size = SMALL_AOUTSZ;
- if (bfd_bwrite (& buff, (bfd_size_type) size, abfd) != size)
- return false;
- }
- #endif
- #endif
- return true;
- }
- static bool
- coff_set_section_contents (bfd * abfd,
- sec_ptr section,
- const void * location,
- file_ptr offset,
- bfd_size_type count)
- {
- if (! abfd->output_has_begun) /* Set by bfd.c handler. */
- {
- if (! coff_compute_section_file_positions (abfd))
- return false;
- }
- #if defined(_LIB) && !defined(TARG_AUX)
- /* The physical address field of a .lib section is used to hold the
- number of shared libraries in the section. This code counts the
- number of sections being written, and increments the lma field
- with the number.
- I have found no documentation on the contents of this section.
- Experimentation indicates that the section contains zero or more
- records, each of which has the following structure:
- - a (four byte) word holding the length of this record, in words,
- - a word that always seems to be set to "2",
- - the path to a shared library, null-terminated and then padded
- to a whole word boundary.
- bfd_assert calls have been added to alert if an attempt is made
- to write a section which doesn't follow these assumptions. The
- code has been tested on ISC 4.1 by me, and on SCO by Robert Lipe
- <robertl@arnet.com> (Thanks!).
- Gvran Uddeborg <gvran@uddeborg.pp.se>. */
- if (strcmp (section->name, _LIB) == 0)
- {
- bfd_byte *rec, *recend;
- rec = (bfd_byte *) location;
- recend = rec + count;
- while (rec < recend)
- {
- ++section->lma;
- rec += bfd_get_32 (abfd, rec) * 4;
- }
- BFD_ASSERT (rec == recend);
- }
- #endif
- /* Don't write out bss sections - one way to do this is to
- see if the filepos has not been set. */
- if (section->filepos == 0)
- return true;
- if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0)
- return false;
- if (count == 0)
- return true;
- return bfd_bwrite (location, count, abfd) == count;
- }
- static void *
- buy_and_read (bfd *abfd, file_ptr where,
- bfd_size_type nmemb, bfd_size_type size)
- {
- size_t amt;
- if (_bfd_mul_overflow (nmemb, size, &amt))
- {
- bfd_set_error (bfd_error_file_too_big);
- return NULL;
- }
- if (bfd_seek (abfd, where, SEEK_SET) != 0)
- return NULL;
- return _bfd_malloc_and_read (abfd, amt, amt);
- }
- /*
- SUBSUBSECTION
- Reading linenumbers
- Creating the linenumber table is done by reading in the entire
- coff linenumber table, and creating another table for internal use.
- A coff linenumber table is structured so that each function
- is marked as having a line number of 0. Each line within the
- function is an offset from the first line in the function. The
- base of the line number information for the table is stored in
- the symbol associated with the function.
- Note: The PE format uses line number 0 for a flag indicating a
- new source file.
- The information is copied from the external to the internal
- table, and each symbol which marks a function is marked by
- pointing its...
- How does this work ?
- */
- static int
- coff_sort_func_alent (const void * arg1, const void * arg2)
- {
- const alent *al1 = *(const alent **) arg1;
- const alent *al2 = *(const alent **) arg2;
- const coff_symbol_type *s1 = (const coff_symbol_type *) (al1->u.sym);
- const coff_symbol_type *s2 = (const coff_symbol_type *) (al2->u.sym);
- if (s1 == NULL || s2 == NULL)
- return 0;
- if (s1->symbol.value < s2->symbol.value)
- return -1;
- else if (s1->symbol.value > s2->symbol.value)
- return 1;
- return 0;
- }
- static bool
- coff_slurp_line_table (bfd *abfd, asection *asect)
- {
- LINENO *native_lineno;
- alent *lineno_cache;
- unsigned int counter;
- alent *cache_ptr;
- bfd_vma prev_offset = 0;
- bool ordered = true;
- unsigned int nbr_func;
- LINENO *src;
- bool have_func;
- bool ret = true;
- size_t amt;
- if (asect->lineno_count == 0)
- return true;
- BFD_ASSERT (asect->lineno == NULL);
- native_lineno = (LINENO *) buy_and_read (abfd, asect->line_filepos,
- asect->lineno_count,
- bfd_coff_linesz (abfd));
- if (native_lineno == NULL)
- {
- _bfd_error_handler
- (_("%pB: warning: line number table read failed"), abfd);
- return false;
- }
- if (_bfd_mul_overflow (asect->lineno_count + 1, sizeof (alent), &amt))
- {
- bfd_set_error (bfd_error_file_too_big);
- free (native_lineno);
- return false;
- }
- lineno_cache = (alent *) bfd_alloc (abfd, amt);
- if (lineno_cache == NULL)
- {
- free (native_lineno);
- return false;
- }
- cache_ptr = lineno_cache;
- asect->lineno = lineno_cache;
- src = native_lineno;
- nbr_func = 0;
- have_func = false;
- for (counter = 0; counter < asect->lineno_count; counter++, src++)
- {
- struct internal_lineno dst;
- bfd_coff_swap_lineno_in (abfd, src, &dst);
- cache_ptr->line_number = dst.l_lnno;
- /* Appease memory checkers that get all excited about
- uninitialised memory when copying alents if u.offset is
- larger than u.sym. (64-bit BFD on 32-bit host.) */
- memset (&cache_ptr->u, 0, sizeof (cache_ptr->u));
- if (cache_ptr->line_number == 0)
- {
- combined_entry_type * ent;
- unsigned long symndx;
- coff_symbol_type *sym;
- have_func = false;
- symndx = dst.l_addr.l_symndx;
- if (symndx >= obj_raw_syment_count (abfd))
- {
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%pB: warning: illegal symbol index 0x%lx in line number entry %d"),
- abfd, symndx, counter);
- cache_ptr->line_number = -1;
- ret = false;
- continue;
- }
- ent = obj_raw_syments (abfd) + symndx;
- /* FIXME: We should not be casting between ints and
- pointers like this. */
- if (! ent->is_sym)
- {
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%pB: warning: illegal symbol index 0x%lx in line number entry %d"),
- abfd, symndx, counter);
- cache_ptr->line_number = -1;
- ret = false;
- continue;
- }
- sym = (coff_symbol_type *) (ent->u.syment._n._n_n._n_zeroes);
- /* PR 17512 file: 078-10659-0.004 */
- if (sym < obj_symbols (abfd)
- || sym >= obj_symbols (abfd) + bfd_get_symcount (abfd))
- {
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%pB: warning: illegal symbol in line number entry %d"),
- abfd, counter);
- cache_ptr->line_number = -1;
- ret = false;
- continue;
- }
- have_func = true;
- nbr_func++;
- cache_ptr->u.sym = (asymbol *) sym;
- if (sym->lineno != NULL)
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%pB: warning: duplicate line number information for `%s'"),
- abfd, bfd_asymbol_name (&sym->symbol));
- sym->lineno = cache_ptr;
- if (sym->symbol.value < prev_offset)
- ordered = false;
- prev_offset = sym->symbol.value;
- }
- else if (!have_func)
- /* Drop line information that has no associated function.
- PR 17521: file: 078-10659-0.004. */
- continue;
- else
- cache_ptr->u.offset = dst.l_addr.l_paddr - bfd_section_vma (asect);
- cache_ptr++;
- }
- asect->lineno_count = cache_ptr - lineno_cache;
- memset (cache_ptr, 0, sizeof (*cache_ptr));
- free (native_lineno);
- /* On some systems (eg AIX5.3) the lineno table may not be sorted. */
- if (!ordered)
- {
- /* Sort the table. */
- alent **func_table;
- alent *n_lineno_cache;
- /* Create a table of functions. */
- if (_bfd_mul_overflow (nbr_func, sizeof (alent *), &amt))
- {
- bfd_set_error (bfd_error_file_too_big);
- ret = false;
- }
- else if ((func_table = (alent **) bfd_alloc (abfd, amt)) != NULL)
- {
- alent **p = func_table;
- unsigned int i;
- for (i = 0; i < asect->lineno_count; i++)
- if (lineno_cache[i].line_number == 0)
- *p++ = &lineno_cache[i];
- BFD_ASSERT ((unsigned int) (p - func_table) == nbr_func);
- /* Sort by functions. */
- qsort (func_table, nbr_func, sizeof (alent *), coff_sort_func_alent);
- /* Create the new sorted table. */
- if (_bfd_mul_overflow (asect->lineno_count, sizeof (alent), &amt))
- {
- bfd_set_error (bfd_error_file_too_big);
- ret = false;
- }
- else if ((n_lineno_cache = (alent *) bfd_alloc (abfd, amt)) != NULL)
- {
- alent *n_cache_ptr = n_lineno_cache;
- for (i = 0; i < nbr_func; i++)
- {
- coff_symbol_type *sym;
- alent *old_ptr = func_table[i];
- /* Update the function entry. */
- sym = (coff_symbol_type *) old_ptr->u.sym;
- /* PR binutils/17512: Point the lineno to where
- this entry will be after the memcpy below. */
- sym->lineno = lineno_cache + (n_cache_ptr - n_lineno_cache);
- /* Copy the function and line number entries. */
- do
- *n_cache_ptr++ = *old_ptr++;
- while (old_ptr->line_number != 0);
- }
- memcpy (lineno_cache, n_lineno_cache,
- asect->lineno_count * sizeof (alent));
- }
- else
- ret = false;
- bfd_release (abfd, func_table);
- }
- else
- ret = false;
- }
- return ret;
- }
- /* Slurp in the symbol table, converting it to generic form. Note
- that if coff_relocate_section is defined, the linker will read
- symbols via coff_link_add_symbols, rather than via this routine. */
- static bool
- coff_slurp_symbol_table (bfd * abfd)
- {
- combined_entry_type *native_symbols;
- coff_symbol_type *cached_area;
- unsigned int *table_ptr;
- unsigned int number_of_symbols = 0;
- bool ret = true;
- size_t amt;
- if (obj_symbols (abfd))
- return true;
- /* Read in the symbol table. */
- if ((native_symbols = coff_get_normalized_symtab (abfd)) == NULL)
- return false;
- /* Allocate enough room for all the symbols in cached form. */
- if (_bfd_mul_overflow (obj_raw_syment_count (abfd),
- sizeof (*cached_area), &amt))
- {
- bfd_set_error (bfd_error_file_too_big);
- return false;
- }
- cached_area = (coff_symbol_type *) bfd_alloc (abfd, amt);
- if (cached_area == NULL)
- return false;
- if (_bfd_mul_overflow (obj_raw_syment_count (abfd),
- sizeof (*table_ptr), &amt))
- {
- bfd_set_error (bfd_error_file_too_big);
- return false;
- }
- table_ptr = (unsigned int *) bfd_zalloc (abfd, amt);
- if (table_ptr == NULL)
- return false;
- else
- {
- coff_symbol_type *dst = cached_area;
- unsigned int last_native_index = obj_raw_syment_count (abfd);
- unsigned int this_index = 0;
- while (this_index < last_native_index)
- {
- combined_entry_type *src = native_symbols + this_index;
- table_ptr[this_index] = number_of_symbols;
- dst->symbol.the_bfd = abfd;
- BFD_ASSERT (src->is_sym);
- dst->symbol.name = (char *) (src->u.syment._n._n_n._n_offset);
- /* We use the native name field to point to the cached field. */
- src->u.syment._n._n_n._n_zeroes = (bfd_hostptr_t) dst;
- dst->symbol.section = coff_section_from_bfd_index (abfd,
- src->u.syment.n_scnum);
- dst->symbol.flags = 0;
- /* PR 17512: file: 079-7098-0.001:0.1. */
- dst->symbol.value = 0;
- dst->done_lineno = false;
- switch (src->u.syment.n_sclass)
- {
- case C_EXT:
- case C_WEAKEXT:
- #if defined ARM
- case C_THUMBEXT:
- case C_THUMBEXTFUNC:
- #endif
- #ifdef RS6000COFF_C
- case C_HIDEXT:
- #if ! defined _AIX52 && ! defined AIX_WEAK_SUPPORT
- case C_AIX_WEAKEXT:
- #endif
- #endif
- #ifdef C_SYSTEM
- case C_SYSTEM: /* System Wide variable. */
- #endif
- #ifdef COFF_WITH_PE
- /* In PE, 0x68 (104) denotes a section symbol. */
- case C_SECTION:
- /* In PE, 0x69 (105) denotes a weak external symbol. */
- case C_NT_WEAK:
- #endif
- switch (coff_classify_symbol (abfd, &src->u.syment))
- {
- case COFF_SYMBOL_GLOBAL:
- dst->symbol.flags = BSF_EXPORT | BSF_GLOBAL;
- #if defined COFF_WITH_PE
- /* PE sets the symbol to a value relative to the
- start of the section. */
- dst->symbol.value = src->u.syment.n_value;
- #else
- dst->symbol.value = (src->u.syment.n_value
- - dst->symbol.section->vma);
- #endif
- if (ISFCN ((src->u.syment.n_type)))
- /* A function ext does not go at the end of a
- file. */
- dst->symbol.flags |= BSF_NOT_AT_END | BSF_FUNCTION;
- break;
- case COFF_SYMBOL_COMMON:
- dst->symbol.section = bfd_com_section_ptr;
- dst->symbol.value = src->u.syment.n_value;
- break;
- case COFF_SYMBOL_UNDEFINED:
- dst->symbol.section = bfd_und_section_ptr;
- dst->symbol.value = 0;
- break;
- case COFF_SYMBOL_PE_SECTION:
- dst->symbol.flags |= BSF_EXPORT | BSF_SECTION_SYM;
- dst->symbol.value = 0;
- break;
- case COFF_SYMBOL_LOCAL:
- dst->symbol.flags = BSF_LOCAL;
- #if defined COFF_WITH_PE
- /* PE sets the symbol to a value relative to the
- start of the section. */
- dst->symbol.value = src->u.syment.n_value;
- #else
- dst->symbol.value = (src->u.syment.n_value
- - dst->symbol.section->vma);
- #endif
- if (ISFCN ((src->u.syment.n_type)))
- dst->symbol.flags |= BSF_NOT_AT_END | BSF_FUNCTION;
- break;
- }
- #ifdef RS6000COFF_C
- /* A symbol with a csect entry should not go at the end. */
- if (src->u.syment.n_numaux > 0)
- dst->symbol.flags |= BSF_NOT_AT_END;
- #endif
- #ifdef COFF_WITH_PE
- if (src->u.syment.n_sclass == C_NT_WEAK)
- dst->symbol.flags |= BSF_WEAK;
- if (src->u.syment.n_sclass == C_SECTION
- && src->u.syment.n_scnum > 0)
- dst->symbol.flags = BSF_LOCAL;
- #endif
- if (src->u.syment.n_sclass == C_WEAKEXT
- #ifdef RS6000COFF_C
- || src->u.syment.n_sclass == C_AIX_WEAKEXT
- #endif
- )
- dst->symbol.flags |= BSF_WEAK;
- break;
- case C_STAT: /* Static. */
- #if defined ARM
- case C_THUMBSTAT: /* Thumb static. */
- case C_THUMBLABEL: /* Thumb label. */
- case C_THUMBSTATFUNC:/* Thumb static function. */
- #endif
- #ifdef RS6000COFF_C
- case C_DWARF: /* A label in a dwarf section. */
- case C_INFO: /* A label in a comment section. */
- #endif
- case C_LABEL: /* Label. */
- if (src->u.syment.n_scnum == N_DEBUG)
- dst->symbol.flags = BSF_DEBUGGING;
- else
- dst->symbol.flags = BSF_LOCAL;
- /* Base the value as an index from the base of the
- section, if there is one. */
- if (dst->symbol.section)
- {
- #if defined COFF_WITH_PE
- /* PE sets the symbol to a value relative to the
- start of the section. */
- dst->symbol.value = src->u.syment.n_value;
- #else
- dst->symbol.value = (src->u.syment.n_value
- - dst->symbol.section->vma);
- #endif
- }
- else
- dst->symbol.value = src->u.syment.n_value;
- break;
- case C_MOS: /* Member of structure. */
- case C_EOS: /* End of structure. */
- case C_REGPARM: /* Register parameter. */
- case C_REG: /* register variable. */
- /* C_AUTOARG conflicts with TI COFF C_UEXT. */
- case C_TPDEF: /* Type definition. */
- case C_ARG:
- case C_AUTO: /* Automatic variable. */
- case C_FIELD: /* Bit field. */
- case C_ENTAG: /* Enumeration tag. */
- case C_MOE: /* Member of enumeration. */
- case C_MOU: /* Member of union. */
- case C_UNTAG: /* Union tag. */
- dst->symbol.flags = BSF_DEBUGGING;
- dst->symbol.value = (src->u.syment.n_value);
- break;
- case C_FILE: /* File name. */
- case C_STRTAG: /* Structure tag. */
- #ifdef RS6000COFF_C
- case C_GSYM:
- case C_LSYM:
- case C_PSYM:
- case C_RSYM:
- case C_RPSYM:
- case C_STSYM:
- case C_TCSYM:
- case C_BCOMM:
- case C_ECOML:
- case C_ECOMM:
- case C_DECL:
- case C_ENTRY:
- case C_FUN:
- case C_ESTAT:
- #endif
- dst->symbol.flags = BSF_DEBUGGING;
- dst->symbol.value = (src->u.syment.n_value);
- break;
- #ifdef RS6000COFF_C
- case C_BINCL: /* Beginning of include file. */
- case C_EINCL: /* Ending of include file. */
- /* The value is actually a pointer into the line numbers
- of the file. We locate the line number entry, and
- set the section to the section which contains it, and
- the value to the index in that section. */
- {
- asection *sec;
- dst->symbol.flags = BSF_DEBUGGING;
- for (sec = abfd->sections; sec != NULL; sec = sec->next)
- if (sec->line_filepos <= (file_ptr) src->u.syment.n_value
- && ((file_ptr) (sec->line_filepos
- + sec->lineno_count * bfd_coff_linesz (abfd))
- > (file_ptr) src->u.syment.n_value))
- break;
- if (sec == NULL)
- dst->symbol.value = 0;
- else
- {
- dst->symbol.section = sec;
- dst->symbol.value = ((src->u.syment.n_value
- - sec->line_filepos)
- / bfd_coff_linesz (abfd));
- src->fix_line = 1;
- }
- }
- break;
- case C_BSTAT:
- dst->symbol.flags = BSF_DEBUGGING;
- /* The value is actually a symbol index. Save a pointer
- to the symbol instead of the index. FIXME: This
- should use a union. */
- src->u.syment.n_value
- = (bfd_hostptr_t) (native_symbols + src->u.syment.n_value);
- dst->symbol.value = src->u.syment.n_value;
- src->fix_value = 1;
- break;
- #endif
- case C_BLOCK: /* ".bb" or ".eb". */
- case C_FCN: /* ".bf" or ".ef" (or PE ".lf"). */
- case C_EFCN: /* Physical end of function. */
- #if defined COFF_WITH_PE
- /* PE sets the symbol to a value relative to the start
- of the section. */
- dst->symbol.value = src->u.syment.n_value;
- if (strcmp (dst->symbol.name, ".bf") != 0)
- {
- /* PE uses funny values for .ef and .lf; don't
- relocate them. */
- dst->symbol.flags = BSF_DEBUGGING;
- }
- else
- dst->symbol.flags = BSF_DEBUGGING | BSF_DEBUGGING_RELOC;
- #else
- /* Base the value as an index from the base of the
- section. */
- dst->symbol.flags = BSF_LOCAL;
- dst->symbol.value = (src->u.syment.n_value
- - dst->symbol.section->vma);
- #endif
- break;
- case C_STATLAB: /* Static load time label. */
- dst->symbol.value = src->u.syment.n_value;
- dst->symbol.flags = BSF_GLOBAL;
- break;
- case C_NULL:
- /* PE DLLs sometimes have zeroed out symbols for some
- reason. Just ignore them without a warning. */
- if (src->u.syment.n_type == 0
- && src->u.syment.n_value == 0
- && src->u.syment.n_scnum == 0)
- break;
- #ifdef RS6000COFF_C
- /* XCOFF specific: deleted entry. */
- if (src->u.syment.n_value == C_NULL_VALUE)
- break;
- #endif
- /* Fall through. */
- case C_EXTDEF: /* External definition. */
- case C_ULABEL: /* Undefined label. */
- case C_USTATIC: /* Undefined static. */
- #ifndef COFF_WITH_PE
- /* C_LINE in regular coff is 0x68. NT has taken over this storage
- class to represent a section symbol. */
- case C_LINE: /* line # reformatted as symbol table entry. */
- /* NT uses 0x67 for a weak symbol, not C_ALIAS. */
- case C_ALIAS: /* Duplicate tag. */
- #endif
- /* New storage classes for TI COFF. */
- #ifdef TICOFF
- case C_UEXT: /* Tentative external definition. */
- #endif
- case C_EXTLAB: /* External load time label. */
- default:
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%pB: unrecognized storage class %d for %s symbol `%s'"),
- abfd, src->u.syment.n_sclass,
- dst->symbol.section->name, dst->symbol.name);
- ret = false;
- /* Fall through. */
- case C_HIDDEN: /* Ext symbol in dmert public lib. */
- /* PR 20722: These symbols can also be generated by
- building DLLs with --gc-sections enabled. */
- dst->symbol.flags = BSF_DEBUGGING;
- dst->symbol.value = (src->u.syment.n_value);
- break;
- }
- dst->native = src;
- dst->symbol.udata.i = 0;
- dst->lineno = NULL;
- this_index += (src->u.syment.n_numaux) + 1;
- dst++;
- number_of_symbols++;
- }
- }
- obj_symbols (abfd) = cached_area;
- obj_raw_syments (abfd) = native_symbols;
- abfd->symcount = number_of_symbols;
- obj_convert (abfd) = table_ptr;
- /* Slurp the line tables for each section too. */
- {
- asection *p;
- p = abfd->sections;
- while (p)
- {
- if (! coff_slurp_line_table (abfd, p))
- return false;
- p = p->next;
- }
- }
- return ret;
- }
- /* Classify a COFF symbol. A couple of targets have globally visible
- symbols which are not class C_EXT, and this handles those. It also
- recognizes some special PE cases. */
- static enum coff_symbol_classification
- coff_classify_symbol (bfd *abfd,
- struct internal_syment *syment)
- {
- /* FIXME: This partially duplicates the switch in
- coff_slurp_symbol_table. */
- switch (syment->n_sclass)
- {
- case C_EXT:
- case C_WEAKEXT:
- #ifdef ARM
- case C_THUMBEXT:
- case C_THUMBEXTFUNC:
- #endif
- #ifdef RS6000COFF_C
- case C_HIDEXT:
- #if ! defined _AIX52 && ! defined AIX_WEAK_SUPPORT
- case C_AIX_WEAKEXT:
- #endif
- #endif
- #ifdef C_SYSTEM
- case C_SYSTEM:
- #endif
- #ifdef COFF_WITH_PE
- case C_NT_WEAK:
- #endif
- if (syment->n_scnum == 0)
- {
- if (syment->n_value == 0)
- return COFF_SYMBOL_UNDEFINED;
- else
- return COFF_SYMBOL_COMMON;
- }
- #ifdef RS6000COFF_C
- if (syment->n_sclass == C_HIDEXT)
- return COFF_SYMBOL_LOCAL;
- #endif
- return COFF_SYMBOL_GLOBAL;
- default:
- break;
- }
- #ifdef COFF_WITH_PE
- if (syment->n_sclass == C_STAT)
- {
- if (syment->n_scnum == 0)
- /* The Microsoft compiler sometimes generates these if a
- small static function is inlined every time it is used.
- The function is discarded, but the symbol table entry
- remains. */
- return COFF_SYMBOL_LOCAL;
- #ifdef STRICT_PE_FORMAT
- /* This is correct for Microsoft generated objects, but it
- breaks gas generated objects. */
- if (syment->n_value == 0)
- {
- asection *sec;
- char * name;
- char buf[SYMNMLEN + 1];
- name = _bfd_coff_internal_syment_name (abfd, syment, buf)
- sec = coff_section_from_bfd_index (abfd, syment->n_scnum);
- if (sec != NULL && name != NULL
- && (strcmp (bfd_section_name (sec), name) == 0))
- return COFF_SYMBOL_PE_SECTION;
- }
- #endif
- return COFF_SYMBOL_LOCAL;
- }
- if (syment->n_sclass == C_SECTION)
- {
- /* In some cases in a DLL generated by the Microsoft linker, the
- n_value field will contain garbage. FIXME: This should
- probably be handled by the swapping function instead. */
- syment->n_value = 0;
- if (syment->n_scnum == 0)
- return COFF_SYMBOL_UNDEFINED;
- return COFF_SYMBOL_PE_SECTION;
- }
- #endif /* COFF_WITH_PE */
- /* If it is not a global symbol, we presume it is a local symbol. */
- if (syment->n_scnum == 0)
- {
- char buf[SYMNMLEN + 1];
- _bfd_error_handler
- /* xgettext:c-format */
- (_("warning: %pB: local symbol `%s' has no section"),
- abfd, _bfd_coff_internal_syment_name (abfd, syment, buf));
- }
- return COFF_SYMBOL_LOCAL;
- }
- /*
- SUBSUBSECTION
- Reading relocations
- Coff relocations are easily transformed into the internal BFD form
- (@code{arelent}).
- Reading a coff relocation table is done in the following stages:
- o Read the entire coff relocation table into memory.
- o Process each relocation in turn; first swap it from the
- external to the internal form.
- o Turn the symbol referenced in the relocation's symbol index
- into a pointer into the canonical symbol table.
- This table is the same as the one returned by a call to
- @code{bfd_canonicalize_symtab}. The back end will call that
- routine and save the result if a canonicalization hasn't been done.
- o The reloc index is turned into a pointer to a howto
- structure, in a back end specific way. For instance, the 386
- uses the @code{r_type} to directly produce an index
- into a howto table vector.
- */
- #ifndef CALC_ADDEND
- #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \
- { \
- coff_symbol_type *coffsym = NULL; \
- \
- if (ptr && bfd_asymbol_bfd (ptr) != abfd) \
- coffsym = (obj_symbols (abfd) \
- + (cache_ptr->sym_ptr_ptr - symbols)); \
- else if (ptr) \
- coffsym = coff_symbol_from (ptr); \
- if (coffsym != NULL \
- && coffsym->native->is_sym \
- && coffsym->native->u.syment.n_scnum == 0) \
- cache_ptr->addend = 0; \
- else if (ptr && bfd_asymbol_bfd (ptr) == abfd \
- && ptr->section != NULL) \
- cache_ptr->addend = - (ptr->section->vma + ptr->value); \
- else \
- cache_ptr->addend = 0; \
- }
- #endif
- static bool
- coff_slurp_reloc_table (bfd * abfd, sec_ptr asect, asymbol ** symbols)
- {
- bfd_byte *native_relocs;
- arelent *reloc_cache;
- arelent *cache_ptr;
- unsigned int idx;
- size_t amt;
- if (asect->relocation)
- return true;
- if (asect->reloc_count == 0)
- return true;
- if (asect->flags & SEC_CONSTRUCTOR)
- return true;
- if (!coff_slurp_symbol_table (abfd))
- return false;
- native_relocs = (bfd_byte *) buy_and_read (abfd, asect->rel_filepos,
- asect->reloc_count,
- bfd_coff_relsz (abfd));
- if (native_relocs == NULL)
- return false;
- if (_bfd_mul_overflow (asect->reloc_count, sizeof (arelent), &amt))
- {
- bfd_set_error (bfd_error_file_too_big);
- return false;
- }
- reloc_cache = (arelent *) bfd_alloc (abfd, amt);
- if (reloc_cache == NULL)
- {
- free (native_relocs);
- return false;
- }
- for (idx = 0; idx < asect->reloc_count; idx++)
- {
- struct internal_reloc dst;
- void *src;
- #ifndef RELOC_PROCESSING
- asymbol *ptr;
- #endif
- cache_ptr = reloc_cache + idx;
- src = native_relocs + idx * (size_t) bfd_coff_relsz (abfd);
- dst.r_offset = 0;
- bfd_coff_swap_reloc_in (abfd, src, &dst);
- #ifdef RELOC_PROCESSING
- RELOC_PROCESSING (cache_ptr, &dst, symbols, abfd, asect);
- #else
- cache_ptr->address = dst.r_vaddr;
- if (dst.r_symndx != -1 && symbols != NULL)
- {
- if (dst.r_symndx < 0 || dst.r_symndx >= obj_conv_table_size (abfd))
- {
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%pB: warning: illegal symbol index %ld in relocs"),
- abfd, dst.r_symndx);
- cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
- ptr = NULL;
- }
- else
- {
- cache_ptr->sym_ptr_ptr = (symbols
- + obj_convert (abfd)[dst.r_symndx]);
- ptr = *(cache_ptr->sym_ptr_ptr);
- }
- }
- else
- {
- cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
- ptr = NULL;
- }
- /* The symbols definitions that we have read in have been
- relocated as if their sections started at 0. But the offsets
- refering to the symbols in the raw data have not been
- modified, so we have to have a negative addend to compensate.
- Note that symbols which used to be common must be left alone. */
- /* Calculate any reloc addend by looking at the symbol. */
- CALC_ADDEND (abfd, ptr, dst, cache_ptr);
- (void) ptr;
- cache_ptr->address -= asect->vma;
- /* !! cache_ptr->section = NULL;*/
- /* Fill in the cache_ptr->howto field from dst.r_type. */
- RTYPE2HOWTO (cache_ptr, &dst);
- #endif /* RELOC_PROCESSING */
- if (cache_ptr->howto == NULL)
- {
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%pB: illegal relocation type %d at address %#" PRIx64),
- abfd, dst.r_type, (uint64_t) dst.r_vaddr);
- bfd_set_error (bfd_error_bad_value);
- free (native_relocs);
- return false;
- }
- }
- free (native_relocs);
- asect->relocation = reloc_cache;
- return true;
- }
- #ifndef coff_rtype_to_howto
- #ifdef RTYPE2HOWTO
- /* Get the howto structure for a reloc. This is only used if the file
- including this one defines coff_relocate_section to be
- _bfd_coff_generic_relocate_section, so it is OK if it does not
- always work. It is the responsibility of the including file to
- make sure it is reasonable if it is needed. */
- static reloc_howto_type *
- coff_rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
- asection *sec ATTRIBUTE_UNUSED,
- struct internal_reloc *rel ATTRIBUTE_UNUSED,
- struct coff_link_hash_entry *h ATTRIBUTE_UNUSED,
- struct internal_syment *sym ATTRIBUTE_UNUSED,
- bfd_vma *addendp ATTRIBUTE_UNUSED)
- {
- arelent genrel;
- genrel.howto = NULL;
- RTYPE2HOWTO (&genrel, rel);
- return genrel.howto;
- }
- #else /* ! defined (RTYPE2HOWTO) */
- #define coff_rtype_to_howto NULL
- #endif /* ! defined (RTYPE2HOWTO) */
- #endif /* ! defined (coff_rtype_to_howto) */
- /* This is stupid. This function should be a boolean predicate. */
- static long
- coff_canonicalize_reloc (bfd * abfd,
- sec_ptr section,
- arelent ** relptr,
- asymbol ** symbols)
- {
- arelent *tblptr = section->relocation;
- unsigned int count = 0;
- if (section->flags & SEC_CONSTRUCTOR)
- {
- /* This section has relocs made up by us, they are not in the
- file, so take them out of their chain and place them into
- the data area provided. */
- arelent_chain *chain = section->constructor_chain;
- for (count = 0; count < section->reloc_count; count++)
- {
- *relptr++ = &chain->relent;
- chain = chain->next;
- }
- }
- else
- {
- if (! coff_slurp_reloc_table (abfd, section, symbols))
- return -1;
- tblptr = section->relocation;
- for (; count++ < section->reloc_count;)
- *relptr++ = tblptr++;
- }
- *relptr = 0;
- return section->reloc_count;
- }
- #ifndef coff_set_reloc
- #define coff_set_reloc _bfd_generic_set_reloc
- #endif
- #ifndef coff_reloc16_estimate
- #define coff_reloc16_estimate dummy_reloc16_estimate
- static int
- dummy_reloc16_estimate (bfd *abfd ATTRIBUTE_UNUSED,
- asection *input_section ATTRIBUTE_UNUSED,
- arelent *reloc ATTRIBUTE_UNUSED,
- unsigned int shrink ATTRIBUTE_UNUSED,
- struct bfd_link_info *link_info ATTRIBUTE_UNUSED)
- {
- abort ();
- return 0;
- }
- #endif
- #ifndef coff_reloc16_extra_cases
- #define coff_reloc16_extra_cases dummy_reloc16_extra_cases
- /* This works even if abort is not declared in any header file. */
- static void
- dummy_reloc16_extra_cases (bfd *abfd ATTRIBUTE_UNUSED,
- struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
- struct bfd_link_order *link_order ATTRIBUTE_UNUSED,
- arelent *reloc ATTRIBUTE_UNUSED,
- bfd_byte *data ATTRIBUTE_UNUSED,
- unsigned int *src_ptr ATTRIBUTE_UNUSED,
- unsigned int *dst_ptr ATTRIBUTE_UNUSED)
- {
- abort ();
- }
- #endif
- /* If coff_relocate_section is defined, we can use the optimized COFF
- backend linker. Otherwise we must continue to use the old linker. */
- #ifdef coff_relocate_section
- #ifndef coff_bfd_link_hash_table_create
- #define coff_bfd_link_hash_table_create _bfd_coff_link_hash_table_create
- #endif
- #ifndef coff_bfd_link_add_symbols
- #define coff_bfd_link_add_symbols _bfd_coff_link_add_symbols
- #endif
- #ifndef coff_bfd_final_link
- #define coff_bfd_final_link _bfd_coff_final_link
- #endif
- #else /* ! defined (coff_relocate_section) */
- #define coff_relocate_section NULL
- #ifndef coff_bfd_link_hash_table_create
- #define coff_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
- #endif
- #ifndef coff_bfd_link_add_symbols
- #define coff_bfd_link_add_symbols _bfd_generic_link_add_symbols
- #endif
- #define coff_bfd_final_link _bfd_generic_final_link
- #endif /* ! defined (coff_relocate_section) */
- #define coff_bfd_link_just_syms _bfd_generic_link_just_syms
- #define coff_bfd_copy_link_hash_symbol_type \
- _bfd_generic_copy_link_hash_symbol_type
- #define coff_bfd_link_split_section _bfd_generic_link_split_section
- #define coff_bfd_link_check_relocs _bfd_generic_link_check_relocs
- #ifndef coff_start_final_link
- #define coff_start_final_link NULL
- #endif
- #ifndef coff_adjust_symndx
- #define coff_adjust_symndx NULL
- #endif
- #ifndef coff_link_add_one_symbol
- #define coff_link_add_one_symbol _bfd_generic_link_add_one_symbol
- #endif
- #ifndef coff_link_output_has_begun
- static bool
- coff_link_output_has_begun (bfd * abfd,
- struct coff_final_link_info * info ATTRIBUTE_UNUSED)
- {
- return abfd->output_has_begun;
- }
- #endif
- #ifndef coff_final_link_postscript
- static bool
- coff_final_link_postscript (bfd * abfd ATTRIBUTE_UNUSED,
- struct coff_final_link_info * pfinfo ATTRIBUTE_UNUSED)
- {
- return true;
- }
- #endif
- #ifndef coff_SWAP_aux_in
- #define coff_SWAP_aux_in coff_swap_aux_in
- #endif
- #ifndef coff_SWAP_sym_in
- #define coff_SWAP_sym_in coff_swap_sym_in
- #endif
- #ifndef coff_SWAP_lineno_in
- #define coff_SWAP_lineno_in coff_swap_lineno_in
- #endif
- #ifndef coff_SWAP_aux_out
- #define coff_SWAP_aux_out coff_swap_aux_out
- #endif
- #ifndef coff_SWAP_sym_out
- #define coff_SWAP_sym_out coff_swap_sym_out
- #endif
- #ifndef coff_SWAP_lineno_out
- #define coff_SWAP_lineno_out coff_swap_lineno_out
- #endif
- #ifndef coff_SWAP_reloc_out
- #define coff_SWAP_reloc_out coff_swap_reloc_out
- #endif
- #ifndef coff_SWAP_filehdr_out
- #define coff_SWAP_filehdr_out coff_swap_filehdr_out
- #endif
- #ifndef coff_SWAP_aouthdr_out
- #define coff_SWAP_aouthdr_out coff_swap_aouthdr_out
- #endif
- #ifndef coff_SWAP_scnhdr_out
- #define coff_SWAP_scnhdr_out coff_swap_scnhdr_out
- #endif
- #ifndef coff_SWAP_reloc_in
- #define coff_SWAP_reloc_in coff_swap_reloc_in
- #endif
- #ifndef coff_SWAP_filehdr_in
- #define coff_SWAP_filehdr_in coff_swap_filehdr_in
- #endif
- #ifndef coff_SWAP_aouthdr_in
- #define coff_SWAP_aouthdr_in coff_swap_aouthdr_in
- #endif
- #ifndef coff_SWAP_scnhdr_in
- #define coff_SWAP_scnhdr_in coff_swap_scnhdr_in
- #endif
- static bfd_coff_backend_data bfd_coff_std_swap_table ATTRIBUTE_UNUSED =
- {
- coff_SWAP_aux_in, coff_SWAP_sym_in, coff_SWAP_lineno_in,
- coff_SWAP_aux_out, coff_SWAP_sym_out,
- coff_SWAP_lineno_out, coff_SWAP_reloc_out,
- coff_SWAP_filehdr_out, coff_SWAP_aouthdr_out,
- coff_SWAP_scnhdr_out,
- FILHSZ, AOUTSZ, SCNHSZ, SYMESZ, AUXESZ, RELSZ, LINESZ, FILNMLEN,
- #ifdef COFF_LONG_FILENAMES
- true,
- #else
- false,
- #endif
- COFF_DEFAULT_LONG_SECTION_NAMES,
- COFF_DEFAULT_SECTION_ALIGNMENT_POWER,
- #ifdef COFF_FORCE_SYMBOLS_IN_STRINGS
- true,
- #else
- false,
- #endif
- #ifdef COFF_DEBUG_STRING_WIDE_PREFIX
- 4,
- #else
- 2,
- #endif
- 32768,
- coff_SWAP_filehdr_in, coff_SWAP_aouthdr_in, coff_SWAP_scnhdr_in,
- coff_SWAP_reloc_in, coff_bad_format_hook, coff_set_arch_mach_hook,
- coff_mkobject_hook, styp_to_sec_flags, coff_set_alignment_hook,
- coff_slurp_symbol_table, symname_in_debug_hook, coff_pointerize_aux_hook,
- coff_print_aux, coff_reloc16_extra_cases, coff_reloc16_estimate,
- coff_classify_symbol, coff_compute_section_file_positions,
- coff_start_final_link, coff_relocate_section, coff_rtype_to_howto,
- coff_adjust_symndx, coff_link_add_one_symbol,
- coff_link_output_has_begun, coff_final_link_postscript,
- bfd_pe_print_pdata
- };
- #ifdef TICOFF
- /* COFF0 differs in file/section header size and relocation entry size. */
- static bfd_coff_backend_data ticoff0_swap_table =
- {
- coff_SWAP_aux_in, coff_SWAP_sym_in, coff_SWAP_lineno_in,
- coff_SWAP_aux_out, coff_SWAP_sym_out,
- coff_SWAP_lineno_out, coff_swap_reloc_v0_out,
- coff_SWAP_filehdr_out, coff_SWAP_aouthdr_out,
- coff_SWAP_scnhdr_out,
- FILHSZ_V0, AOUTSZ, SCNHSZ_V01, SYMESZ, AUXESZ, RELSZ_V0, LINESZ, FILNMLEN,
- #ifdef COFF_LONG_FILENAMES
- true,
- #else
- false,
- #endif
- COFF_DEFAULT_LONG_SECTION_NAMES,
- COFF_DEFAULT_SECTION_ALIGNMENT_POWER,
- #ifdef COFF_FORCE_SYMBOLS_IN_STRINGS
- true,
- #else
- false,
- #endif
- #ifdef COFF_DEBUG_STRING_WIDE_PREFIX
- 4,
- #else
- 2,
- #endif
- 32768,
- coff_SWAP_filehdr_in, coff_SWAP_aouthdr_in, coff_SWAP_scnhdr_in,
- coff_swap_reloc_v0_in, ticoff0_bad_format_hook, coff_set_arch_mach_hook,
- coff_mkobject_hook, styp_to_sec_flags, coff_set_alignment_hook,
- coff_slurp_symbol_table, symname_in_debug_hook, coff_pointerize_aux_hook,
- coff_print_aux, coff_reloc16_extra_cases, coff_reloc16_estimate,
- coff_classify_symbol, coff_compute_section_file_positions,
- coff_start_final_link, coff_relocate_section, coff_rtype_to_howto,
- coff_adjust_symndx, coff_link_add_one_symbol,
- coff_link_output_has_begun, coff_final_link_postscript,
- bfd_pe_print_pdata
- };
- #endif
- #ifdef TICOFF
- /* COFF1 differs in section header size. */
- static bfd_coff_backend_data ticoff1_swap_table =
- {
- coff_SWAP_aux_in, coff_SWAP_sym_in, coff_SWAP_lineno_in,
- coff_SWAP_aux_out, coff_SWAP_sym_out,
- coff_SWAP_lineno_out, coff_SWAP_reloc_out,
- coff_SWAP_filehdr_out, coff_SWAP_aouthdr_out,
- coff_SWAP_scnhdr_out,
- FILHSZ, AOUTSZ, SCNHSZ_V01, SYMESZ, AUXESZ, RELSZ, LINESZ, FILNMLEN,
- #ifdef COFF_LONG_FILENAMES
- true,
- #else
- false,
- #endif
- COFF_DEFAULT_LONG_SECTION_NAMES,
- COFF_DEFAULT_SECTION_ALIGNMENT_POWER,
- #ifdef COFF_FORCE_SYMBOLS_IN_STRINGS
- true,
- #else
- false,
- #endif
- #ifdef COFF_DEBUG_STRING_WIDE_PREFIX
- 4,
- #else
- 2,
- #endif
- 32768,
- coff_SWAP_filehdr_in, coff_SWAP_aouthdr_in, coff_SWAP_scnhdr_in,
- coff_SWAP_reloc_in, ticoff1_bad_format_hook, coff_set_arch_mach_hook,
- coff_mkobject_hook, styp_to_sec_flags, coff_set_alignment_hook,
- coff_slurp_symbol_table, symname_in_debug_hook, coff_pointerize_aux_hook,
- coff_print_aux, coff_reloc16_extra_cases, coff_reloc16_estimate,
- coff_classify_symbol, coff_compute_section_file_positions,
- coff_start_final_link, coff_relocate_section, coff_rtype_to_howto,
- coff_adjust_symndx, coff_link_add_one_symbol,
- coff_link_output_has_begun, coff_final_link_postscript,
- bfd_pe_print_pdata /* huh */
- };
- #endif
- #ifdef COFF_WITH_PE_BIGOBJ
- /* The UID for bigobj files. */
- static const char header_bigobj_classid[16] =
- {
- 0xC7, 0xA1, 0xBA, 0xD1,
- 0xEE, 0xBA,
- 0xa9, 0x4b,
- 0xAF, 0x20,
- 0xFA, 0xF6, 0x6A, 0xA4, 0xDC, 0xB8
- };
- /* Swap routines. */
- static void
- coff_bigobj_swap_filehdr_in (bfd * abfd, void * src, void * dst)
- {
- struct external_ANON_OBJECT_HEADER_BIGOBJ *filehdr_src =
- (struct external_ANON_OBJECT_HEADER_BIGOBJ *) src;
- struct internal_filehdr *filehdr_dst = (struct internal_filehdr *) dst;
- filehdr_dst->f_magic = H_GET_16 (abfd, filehdr_src->Machine);
- filehdr_dst->f_nscns = H_GET_32 (abfd, filehdr_src->NumberOfSections);
- filehdr_dst->f_timdat = H_GET_32 (abfd, filehdr_src->TimeDateStamp);
- filehdr_dst->f_symptr =
- GET_FILEHDR_SYMPTR (abfd, filehdr_src->PointerToSymbolTable);
- filehdr_dst->f_nsyms = H_GET_32 (abfd, filehdr_src->NumberOfSymbols);
- filehdr_dst->f_opthdr = 0;
- filehdr_dst->f_flags = 0;
- /* Check other magic numbers. */
- if (H_GET_16 (abfd, filehdr_src->Sig1) != IMAGE_FILE_MACHINE_UNKNOWN
- || H_GET_16 (abfd, filehdr_src->Sig2) != 0xffff
- || H_GET_16 (abfd, filehdr_src->Version) != 2
- || memcmp (filehdr_src->ClassID, header_bigobj_classid, 16) != 0)
- filehdr_dst->f_opthdr = 0xffff;
- /* Note that CLR metadata are ignored. */
- }
- static unsigned int
- coff_bigobj_swap_filehdr_out (bfd *abfd, void * in, void * out)
- {
- struct internal_filehdr *filehdr_in = (struct internal_filehdr *) in;
- struct external_ANON_OBJECT_HEADER_BIGOBJ *filehdr_out =
- (struct external_ANON_OBJECT_HEADER_BIGOBJ *) out;
- memset (filehdr_out, 0, sizeof (*filehdr_out));
- H_PUT_16 (abfd, IMAGE_FILE_MACHINE_UNKNOWN, filehdr_out->Sig1);
- H_PUT_16 (abfd, 0xffff, filehdr_out->Sig2);
- H_PUT_16 (abfd, 2, filehdr_out->Version);
- memcpy (filehdr_out->ClassID, header_bigobj_classid, 16);
- H_PUT_16 (abfd, filehdr_in->f_magic, filehdr_out->Machine);
- H_PUT_32 (abfd, filehdr_in->f_nscns, filehdr_out->NumberOfSections);
- H_PUT_32 (abfd, filehdr_in->f_timdat, filehdr_out->TimeDateStamp);
- PUT_FILEHDR_SYMPTR (abfd, filehdr_in->f_symptr,
- filehdr_out->PointerToSymbolTable);
- H_PUT_32 (abfd, filehdr_in->f_nsyms, filehdr_out->NumberOfSymbols);
- return bfd_coff_filhsz (abfd);
- }
- static void
- coff_bigobj_swap_sym_in (bfd * abfd, void * ext1, void * in1)
- {
- SYMENT_BIGOBJ *ext = (SYMENT_BIGOBJ *) ext1;
- struct internal_syment *in = (struct internal_syment *) in1;
- if (ext->e.e_name[0] == 0)
- {
- in->_n._n_n._n_zeroes = 0;
- in->_n._n_n._n_offset = H_GET_32 (abfd, ext->e.e.e_offset);
- }
- else
- {
- #if SYMNMLEN != E_SYMNMLEN
- #error we need to cope with truncating or extending SYMNMLEN
- #else
- memcpy (in->_n._n_name, ext->e.e_name, SYMNMLEN);
- #endif
- }
- in->n_value = H_GET_32 (abfd, ext->e_value);
- BFD_ASSERT (sizeof (in->n_scnum) >= 4);
- in->n_scnum = H_GET_32 (abfd, ext->e_scnum);
- in->n_type = H_GET_16 (abfd, ext->e_type);
- in->n_sclass = H_GET_8 (abfd, ext->e_sclass);
- in->n_numaux = H_GET_8 (abfd, ext->e_numaux);
- }
- static unsigned int
- coff_bigobj_swap_sym_out (bfd * abfd, void * inp, void * extp)
- {
- struct internal_syment *in = (struct internal_syment *) inp;
- SYMENT_BIGOBJ *ext = (SYMENT_BIGOBJ *) extp;
- if (in->_n._n_name[0] == 0)
- {
- H_PUT_32 (abfd, 0, ext->e.e.e_zeroes);
- H_PUT_32 (abfd, in->_n._n_n._n_offset, ext->e.e.e_offset);
- }
- else
- {
- #if SYMNMLEN != E_SYMNMLEN
- #error we need to cope with truncating or extending SYMNMLEN
- #else
- memcpy (ext->e.e_name, in->_n._n_name, SYMNMLEN);
- #endif
- }
- H_PUT_32 (abfd, in->n_value, ext->e_value);
- H_PUT_32 (abfd, in->n_scnum, ext->e_scnum);
- H_PUT_16 (abfd, in->n_type, ext->e_type);
- H_PUT_8 (abfd, in->n_sclass, ext->e_sclass);
- H_PUT_8 (abfd, in->n_numaux, ext->e_numaux);
- return SYMESZ_BIGOBJ;
- }
- static void
- coff_bigobj_swap_aux_in (bfd *abfd,
- void * ext1,
- int type,
- int in_class,
- int indx,
- int numaux,
- void * in1)
- {
- AUXENT_BIGOBJ *ext = (AUXENT_BIGOBJ *) ext1;
- union internal_auxent *in = (union internal_auxent *) in1;
- /* Make sure that all fields in the aux structure are
- initialised. */
- memset (in, 0, sizeof * in);
- switch (in_class)
- {
- case C_FILE:
- if (numaux > 1)
- {
- if (indx == 0)
- memcpy (in->x_file.x_n.x_fname, ext->File.Name,
- numaux * sizeof (AUXENT_BIGOBJ));
- }
- else
- memcpy (in->x_file.x_n.x_fname, ext->File.Name, sizeof (ext->File.Name));
- break;
- case C_STAT:
- case C_LEAFSTAT:
- case C_HIDDEN:
- if (type == T_NULL)
- {
- in->x_scn.x_scnlen = H_GET_32 (abfd, ext->Section.Length);
- in->x_scn.x_nreloc =
- H_GET_16 (abfd, ext->Section.NumberOfRelocations);
- in->x_scn.x_nlinno =
- H_GET_16 (abfd, ext->Section.NumberOfLinenumbers);
- in->x_scn.x_checksum = H_GET_32 (abfd, ext->Section.Checksum);
- in->x_scn.x_associated = H_GET_16 (abfd, ext->Section.Number)
- | (H_GET_16 (abfd, ext->Section.HighNumber) << 16);
- in->x_scn.x_comdat = H_GET_8 (abfd, ext->Section.Selection);
- return;
- }
- break;
- default:
- in->x_sym.x_tagndx.l = H_GET_32 (abfd, ext->Sym.WeakDefaultSymIndex);
- /* Characteristics is ignored. */
- break;
- }
- }
- static unsigned int
- coff_bigobj_swap_aux_out (bfd * abfd,
- void * inp,
- int type,
- int in_class,
- int indx ATTRIBUTE_UNUSED,
- int numaux ATTRIBUTE_UNUSED,
- void * extp)
- {
- union internal_auxent * in = (union internal_auxent *) inp;
- AUXENT_BIGOBJ *ext = (AUXENT_BIGOBJ *) extp;
- memset (ext, 0, AUXESZ);
- switch (in_class)
- {
- case C_FILE:
- memcpy (ext->File.Name, in->x_file.x_n.x_fname, sizeof (ext->File.Name));
- return AUXESZ;
- case C_STAT:
- case C_LEAFSTAT:
- case C_HIDDEN:
- if (type == T_NULL)
- {
- H_PUT_32 (abfd, in->x_scn.x_scnlen, ext->Section.Length);
- H_PUT_16 (abfd, in->x_scn.x_nreloc,
- ext->Section.NumberOfRelocations);
- H_PUT_16 (abfd, in->x_scn.x_nlinno,
- ext->Section.NumberOfLinenumbers);
- H_PUT_32 (abfd, in->x_scn.x_checksum, ext->Section.Checksum);
- H_PUT_16 (abfd, in->x_scn.x_associated & 0xffff,
- ext->Section.Number);
- H_PUT_16 (abfd, (in->x_scn.x_associated >> 16),
- ext->Section.HighNumber);
- H_PUT_8 (abfd, in->x_scn.x_comdat, ext->Section.Selection);
- return AUXESZ;
- }
- break;
- }
- H_PUT_32 (abfd, in->x_sym.x_tagndx.l, ext->Sym.WeakDefaultSymIndex);
- H_PUT_32 (abfd, 1, ext->Sym.WeakSearchType);
- return AUXESZ;
- }
- static bfd_coff_backend_data bigobj_swap_table =
- {
- coff_bigobj_swap_aux_in, coff_bigobj_swap_sym_in, coff_SWAP_lineno_in,
- coff_bigobj_swap_aux_out, coff_bigobj_swap_sym_out,
- coff_SWAP_lineno_out, coff_SWAP_reloc_out,
- coff_bigobj_swap_filehdr_out, coff_SWAP_aouthdr_out,
- coff_SWAP_scnhdr_out,
- FILHSZ_BIGOBJ, AOUTSZ, SCNHSZ, SYMESZ_BIGOBJ, AUXESZ_BIGOBJ,
- RELSZ, LINESZ, FILNMLEN_BIGOBJ,
- true,
- COFF_DEFAULT_LONG_SECTION_NAMES,
- COFF_DEFAULT_SECTION_ALIGNMENT_POWER,
- false,
- 2,
- 1U << 31,
- coff_bigobj_swap_filehdr_in, coff_SWAP_aouthdr_in, coff_SWAP_scnhdr_in,
- coff_SWAP_reloc_in, coff_bad_format_hook, coff_set_arch_mach_hook,
- coff_mkobject_hook, styp_to_sec_flags, coff_set_alignment_hook,
- coff_slurp_symbol_table, symname_in_debug_hook, coff_pointerize_aux_hook,
- coff_print_aux, coff_reloc16_extra_cases, coff_reloc16_estimate,
- coff_classify_symbol, coff_compute_section_file_positions,
- coff_start_final_link, coff_relocate_section, coff_rtype_to_howto,
- coff_adjust_symndx, coff_link_add_one_symbol,
- coff_link_output_has_begun, coff_final_link_postscript,
- bfd_pe_print_pdata /* huh */
- };
- #endif /* COFF_WITH_PE_BIGOBJ */
- #ifndef coff_close_and_cleanup
- #define coff_close_and_cleanup _bfd_coff_close_and_cleanup
- #endif
- #ifndef coff_bfd_free_cached_info
- #define coff_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
- #endif
- #ifndef coff_get_section_contents
- #define coff_get_section_contents _bfd_generic_get_section_contents
- #endif
- #ifndef coff_bfd_copy_private_symbol_data
- #define coff_bfd_copy_private_symbol_data _bfd_generic_bfd_copy_private_symbol_data
- #endif
- #ifndef coff_bfd_copy_private_header_data
- #define coff_bfd_copy_private_header_data _bfd_generic_bfd_copy_private_header_data
- #endif
- #ifndef coff_bfd_copy_private_section_data
- #define coff_bfd_copy_private_section_data _bfd_generic_bfd_copy_private_section_data
- #endif
- #ifndef coff_bfd_copy_private_bfd_data
- #define coff_bfd_copy_private_bfd_data _bfd_generic_bfd_copy_private_bfd_data
- #endif
- #ifndef coff_bfd_merge_private_bfd_data
- #define coff_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data
- #endif
- #ifndef coff_bfd_set_private_flags
- #define coff_bfd_set_private_flags _bfd_generic_bfd_set_private_flags
- #endif
- #ifndef coff_bfd_print_private_bfd_data
- #define coff_bfd_print_private_bfd_data _bfd_generic_bfd_print_private_bfd_data
- #endif
- #ifndef coff_bfd_is_local_label_name
- #define coff_bfd_is_local_label_name _bfd_coff_is_local_label_name
- #endif
- #ifndef coff_bfd_is_target_special_symbol
- #define coff_bfd_is_target_special_symbol _bfd_bool_bfd_asymbol_false
- #endif
- #ifndef coff_read_minisymbols
- #define coff_read_minisymbols _bfd_generic_read_minisymbols
- #endif
- #ifndef coff_minisymbol_to_symbol
- #define coff_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
- #endif
- /* The reloc lookup routine must be supplied by each individual COFF
- backend. */
- #ifndef coff_bfd_reloc_type_lookup
- #define coff_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
- #endif
- #ifndef coff_bfd_reloc_name_lookup
- #define coff_bfd_reloc_name_lookup _bfd_norelocs_bfd_reloc_name_lookup
- #endif
- #ifndef coff_bfd_get_relocated_section_contents
- #define coff_bfd_get_relocated_section_contents \
- bfd_generic_get_relocated_section_contents
- #endif
- #ifndef coff_bfd_relax_section
- #define coff_bfd_relax_section bfd_generic_relax_section
- #endif
- #ifndef coff_bfd_gc_sections
- #define coff_bfd_gc_sections bfd_coff_gc_sections
- #endif
- #ifndef coff_bfd_lookup_section_flags
- #define coff_bfd_lookup_section_flags bfd_generic_lookup_section_flags
- #endif
- #ifndef coff_bfd_merge_sections
- #define coff_bfd_merge_sections bfd_generic_merge_sections
- #endif
- #ifndef coff_bfd_is_group_section
- #define coff_bfd_is_group_section bfd_generic_is_group_section
- #endif
- #ifndef coff_bfd_group_name
- #define coff_bfd_group_name bfd_coff_group_name
- #endif
- #ifndef coff_bfd_discard_group
- #define coff_bfd_discard_group bfd_generic_discard_group
- #endif
- #ifndef coff_section_already_linked
- #define coff_section_already_linked \
- _bfd_coff_section_already_linked
- #endif
- #ifndef coff_bfd_define_common_symbol
- #define coff_bfd_define_common_symbol bfd_generic_define_common_symbol
- #endif
- #ifndef coff_bfd_link_hide_symbol
- #define coff_bfd_link_hide_symbol _bfd_generic_link_hide_symbol
- #endif
- #ifndef coff_bfd_define_start_stop
- #define coff_bfd_define_start_stop bfd_generic_define_start_stop
- #endif
- #define CREATE_BIG_COFF_TARGET_VEC(VAR, NAME, EXTRA_O_FLAGS, EXTRA_S_FLAGS, UNDER, ALTERNATIVE, SWAP_TABLE) \
- const bfd_target VAR = \
- { \
- NAME , \
- bfd_target_coff_flavour, \
- BFD_ENDIAN_BIG, /* Data byte order is big. */ \
- BFD_ENDIAN_BIG, /* Header byte order is big. */ \
- /* object flags */ \
- (HAS_RELOC | EXEC_P | HAS_LINENO | HAS_DEBUG | \
- HAS_SYMS | HAS_LOCALS | WP_TEXT | EXTRA_O_FLAGS), \
- /* section flags */ \
- (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | EXTRA_S_FLAGS),\
- UNDER, /* Leading symbol underscore. */ \
- '/', /* AR_pad_char. */ \
- 15, /* AR_max_namelen. */ \
- 0, /* match priority. */ \
- TARGET_KEEP_UNUSED_SECTION_SYMBOLS, /* keep unused section symbols. */ \
- \
- /* Data conversion functions. */ \
- bfd_getb64, bfd_getb_signed_64, bfd_putb64, \
- bfd_getb32, bfd_getb_signed_32, bfd_putb32, \
- bfd_getb16, bfd_getb_signed_16, bfd_putb16, \
- \
- /* Header conversion functions. */ \
- bfd_getb64, bfd_getb_signed_64, bfd_putb64, \
- bfd_getb32, bfd_getb_signed_32, bfd_putb32, \
- bfd_getb16, bfd_getb_signed_16, bfd_putb16, \
- \
- { /* bfd_check_format. */ \
- _bfd_dummy_target, \
- coff_object_p, \
- bfd_generic_archive_p, \
- _bfd_dummy_target \
- }, \
- { /* bfd_set_format. */ \
- _bfd_bool_bfd_false_error, \
- coff_mkobject, \
- _bfd_generic_mkarchive, \
- _bfd_bool_bfd_false_error \
- }, \
- { /* bfd_write_contents. */ \
- _bfd_bool_bfd_false_error, \
- coff_write_object_contents, \
- _bfd_write_archive_contents, \
- _bfd_bool_bfd_false_error \
- }, \
- \
- BFD_JUMP_TABLE_GENERIC (coff), \
- BFD_JUMP_TABLE_COPY (coff), \
- BFD_JUMP_TABLE_CORE (_bfd_nocore), \
- BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), \
- BFD_JUMP_TABLE_SYMBOLS (coff), \
- BFD_JUMP_TABLE_RELOCS (coff), \
- BFD_JUMP_TABLE_WRITE (coff), \
- BFD_JUMP_TABLE_LINK (coff), \
- BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), \
- \
- ALTERNATIVE, \
- \
- SWAP_TABLE \
- };
- #define CREATE_BIGHDR_COFF_TARGET_VEC(VAR, NAME, EXTRA_O_FLAGS, EXTRA_S_FLAGS, UNDER, ALTERNATIVE, SWAP_TABLE) \
- const bfd_target VAR = \
- { \
- NAME , \
- bfd_target_coff_flavour, \
- BFD_ENDIAN_LITTLE, /* Data byte order is little. */ \
- BFD_ENDIAN_BIG, /* Header byte order is big. */ \
- /* object flags */ \
- (HAS_RELOC | EXEC_P | HAS_LINENO | HAS_DEBUG | \
- HAS_SYMS | HAS_LOCALS | WP_TEXT | EXTRA_O_FLAGS), \
- /* section flags */ \
- (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | EXTRA_S_FLAGS),\
- UNDER, /* Leading symbol underscore. */ \
- '/', /* AR_pad_char. */ \
- 15, /* AR_max_namelen. */ \
- 0, /* match priority. */ \
- TARGET_KEEP_UNUSED_SECTION_SYMBOLS, /* keep unused section symbols. */ \
- \
- /* Data conversion functions. */ \
- bfd_getb64, bfd_getb_signed_64, bfd_putb64, \
- bfd_getb32, bfd_getb_signed_32, bfd_putb32, \
- bfd_getb16, bfd_getb_signed_16, bfd_putb16, \
- \
- /* Header conversion functions. */ \
- bfd_getb64, bfd_getb_signed_64, bfd_putb64, \
- bfd_getb32, bfd_getb_signed_32, bfd_putb32, \
- bfd_getb16, bfd_getb_signed_16, bfd_putb16, \
- \
- { /* bfd_check_format. */ \
- _bfd_dummy_target, \
- coff_object_p, \
- bfd_generic_archive_p, \
- _bfd_dummy_target \
- }, \
- { /* bfd_set_format. */ \
- _bfd_bool_bfd_false_error, \
- coff_mkobject, \
- _bfd_generic_mkarchive, \
- _bfd_bool_bfd_false_error \
- }, \
- { /* bfd_write_contents. */ \
- _bfd_bool_bfd_false_error, \
- coff_write_object_contents, \
- _bfd_write_archive_contents, \
- _bfd_bool_bfd_false_error \
- }, \
- \
- BFD_JUMP_TABLE_GENERIC (coff), \
- BFD_JUMP_TABLE_COPY (coff), \
- BFD_JUMP_TABLE_CORE (_bfd_nocore), \
- BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), \
- BFD_JUMP_TABLE_SYMBOLS (coff), \
- BFD_JUMP_TABLE_RELOCS (coff), \
- BFD_JUMP_TABLE_WRITE (coff), \
- BFD_JUMP_TABLE_LINK (coff), \
- BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), \
- \
- ALTERNATIVE, \
- \
- SWAP_TABLE \
- };
- #define CREATE_LITTLE_COFF_TARGET_VEC(VAR, NAME, EXTRA_O_FLAGS, EXTRA_S_FLAGS, UNDER, ALTERNATIVE, SWAP_TABLE) \
- const bfd_target VAR = \
- { \
- NAME , \
- bfd_target_coff_flavour, \
- BFD_ENDIAN_LITTLE, /* Data byte order is little. */ \
- BFD_ENDIAN_LITTLE, /* Header byte order is little. */ \
- /* object flags */ \
- (HAS_RELOC | EXEC_P | HAS_LINENO | HAS_DEBUG | \
- HAS_SYMS | HAS_LOCALS | WP_TEXT | EXTRA_O_FLAGS), \
- /* section flags */ \
- (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | EXTRA_S_FLAGS),\
- UNDER, /* Leading symbol underscore. */ \
- '/', /* AR_pad_char. */ \
- 15, /* AR_max_namelen. */ \
- 0, /* match priority. */ \
- TARGET_KEEP_UNUSED_SECTION_SYMBOLS, /* keep unused section symbols. */ \
- \
- /* Data conversion functions. */ \
- bfd_getl64, bfd_getl_signed_64, bfd_putl64, \
- bfd_getl32, bfd_getl_signed_32, bfd_putl32, \
- bfd_getl16, bfd_getl_signed_16, bfd_putl16, \
- /* Header conversion functions. */ \
- bfd_getl64, bfd_getl_signed_64, bfd_putl64, \
- bfd_getl32, bfd_getl_signed_32, bfd_putl32, \
- bfd_getl16, bfd_getl_signed_16, bfd_putl16, \
- \
- { /* bfd_check_format. */ \
- _bfd_dummy_target, \
- coff_object_p, \
- bfd_generic_archive_p, \
- _bfd_dummy_target \
- }, \
- { /* bfd_set_format. */ \
- _bfd_bool_bfd_false_error, \
- coff_mkobject, \
- _bfd_generic_mkarchive, \
- _bfd_bool_bfd_false_error \
- }, \
- { /* bfd_write_contents. */ \
- _bfd_bool_bfd_false_error, \
- coff_write_object_contents, \
- _bfd_write_archive_contents, \
- _bfd_bool_bfd_false_error \
- }, \
- \
- BFD_JUMP_TABLE_GENERIC (coff), \
- BFD_JUMP_TABLE_COPY (coff), \
- BFD_JUMP_TABLE_CORE (_bfd_nocore), \
- BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), \
- BFD_JUMP_TABLE_SYMBOLS (coff), \
- BFD_JUMP_TABLE_RELOCS (coff), \
- BFD_JUMP_TABLE_WRITE (coff), \
- BFD_JUMP_TABLE_LINK (coff), \
- BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), \
- \
- ALTERNATIVE, \
- \
- SWAP_TABLE \
- };
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