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- /* Support for HPPA 64-bit ELF
- Copyright (C) 1999-2022 Free Software Foundation, Inc.
- 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. */
- #include "sysdep.h"
- #include "bfd.h"
- #include "libbfd.h"
- #include "elf-bfd.h"
- #include "elf/hppa.h"
- #include "libhppa.h"
- #include "elf64-hppa.h"
- #include "libiberty.h"
- #define ARCH_SIZE 64
- #define PLT_ENTRY_SIZE 0x10
- #define DLT_ENTRY_SIZE 0x8
- #define OPD_ENTRY_SIZE 0x20
- #define ELF_DYNAMIC_INTERPRETER "/usr/lib/pa20_64/dld.sl"
- /* The stub is supposed to load the target address and target's DP
- value out of the PLT, then do an external branch to the target
- address.
- LDD PLTOFF(%r27),%r1
- BVE (%r1)
- LDD PLTOFF+8(%r27),%r27
- Note that we must use the LDD with a 14 bit displacement, not the one
- with a 5 bit displacement. */
- static char plt_stub[] = {0x53, 0x61, 0x00, 0x00, 0xe8, 0x20, 0xd0, 0x00,
- 0x53, 0x7b, 0x00, 0x00 };
- struct elf64_hppa_link_hash_entry
- {
- struct elf_link_hash_entry eh;
- /* Offsets for this symbol in various linker sections. */
- bfd_vma dlt_offset;
- bfd_vma plt_offset;
- bfd_vma opd_offset;
- bfd_vma stub_offset;
- /* The index of the (possibly local) symbol in the input bfd and its
- associated BFD. Needed so that we can have relocs against local
- symbols in shared libraries. */
- long sym_indx;
- bfd *owner;
- /* Dynamic symbols may need to have two different values. One for
- the dynamic symbol table, one for the normal symbol table.
- In such cases we store the symbol's real value and section
- index here so we can restore the real value before we write
- the normal symbol table. */
- bfd_vma st_value;
- int st_shndx;
- /* Used to count non-got, non-plt relocations for delayed sizing
- of relocation sections. */
- struct elf64_hppa_dyn_reloc_entry
- {
- /* Next relocation in the chain. */
- struct elf64_hppa_dyn_reloc_entry *next;
- /* The type of the relocation. */
- int type;
- /* The input section of the relocation. */
- asection *sec;
- /* Number of relocs copied in this section. */
- bfd_size_type count;
- /* The index of the section symbol for the input section of
- the relocation. Only needed when building shared libraries. */
- int sec_symndx;
- /* The offset within the input section of the relocation. */
- bfd_vma offset;
- /* The addend for the relocation. */
- bfd_vma addend;
- } *reloc_entries;
- /* Nonzero if this symbol needs an entry in one of the linker
- sections. */
- unsigned want_dlt;
- unsigned want_plt;
- unsigned want_opd;
- unsigned want_stub;
- };
- struct elf64_hppa_link_hash_table
- {
- struct elf_link_hash_table root;
- /* Shortcuts to get to the various linker defined sections. */
- asection *dlt_sec;
- asection *dlt_rel_sec;
- asection *opd_sec;
- asection *opd_rel_sec;
- asection *other_rel_sec;
- /* Offset of __gp within .plt section. When the PLT gets large we want
- to slide __gp into the PLT section so that we can continue to use
- single DP relative instructions to load values out of the PLT. */
- bfd_vma gp_offset;
- /* Note this is not strictly correct. We should create a stub section for
- each input section with calls. The stub section should be placed before
- the section with the call. */
- asection *stub_sec;
- bfd_vma text_segment_base;
- bfd_vma data_segment_base;
- /* We build tables to map from an input section back to its
- symbol index. This is the BFD for which we currently have
- a map. */
- bfd *section_syms_bfd;
- /* Array of symbol numbers for each input section attached to the
- current BFD. */
- int *section_syms;
- };
- #define hppa_link_hash_table(p) \
- ((is_elf_hash_table ((p)->hash) \
- && elf_hash_table_id (elf_hash_table (p)) == HPPA64_ELF_DATA) \
- ? (struct elf64_hppa_link_hash_table *) (p)->hash : NULL)
- #define hppa_elf_hash_entry(ent) \
- ((struct elf64_hppa_link_hash_entry *)(ent))
- #define eh_name(eh) \
- (eh ? eh->root.root.string : "<undef>")
- typedef struct bfd_hash_entry *(*new_hash_entry_func)
- (struct bfd_hash_entry *, struct bfd_hash_table *, const char *);
- static struct bfd_link_hash_table *elf64_hppa_hash_table_create
- (bfd *abfd);
- /* This must follow the definitions of the various derived linker
- hash tables and shared functions. */
- #include "elf-hppa.h"
- static bool elf64_hppa_object_p
- (bfd *);
- static bool elf64_hppa_create_dynamic_sections
- (bfd *, struct bfd_link_info *);
- static bool elf64_hppa_adjust_dynamic_symbol
- (struct bfd_link_info *, struct elf_link_hash_entry *);
- static bool elf64_hppa_mark_milli_and_exported_functions
- (struct elf_link_hash_entry *, void *);
- static bool elf64_hppa_size_dynamic_sections
- (bfd *, struct bfd_link_info *);
- static int elf64_hppa_link_output_symbol_hook
- (struct bfd_link_info *, const char *, Elf_Internal_Sym *,
- asection *, struct elf_link_hash_entry *);
- static bool elf64_hppa_finish_dynamic_symbol
- (bfd *, struct bfd_link_info *,
- struct elf_link_hash_entry *, Elf_Internal_Sym *);
- static bool elf64_hppa_finish_dynamic_sections
- (bfd *, struct bfd_link_info *);
- static bool elf64_hppa_check_relocs
- (bfd *, struct bfd_link_info *,
- asection *, const Elf_Internal_Rela *);
- static bool elf64_hppa_dynamic_symbol_p
- (struct elf_link_hash_entry *, struct bfd_link_info *);
- static bool elf64_hppa_mark_exported_functions
- (struct elf_link_hash_entry *, void *);
- static bool elf64_hppa_finalize_opd
- (struct elf_link_hash_entry *, void *);
- static bool elf64_hppa_finalize_dlt
- (struct elf_link_hash_entry *, void *);
- static bool allocate_global_data_dlt
- (struct elf_link_hash_entry *, void *);
- static bool allocate_global_data_plt
- (struct elf_link_hash_entry *, void *);
- static bool allocate_global_data_stub
- (struct elf_link_hash_entry *, void *);
- static bool allocate_global_data_opd
- (struct elf_link_hash_entry *, void *);
- static bool get_reloc_section
- (bfd *, struct elf64_hppa_link_hash_table *, asection *);
- static bool count_dyn_reloc
- (bfd *, struct elf64_hppa_link_hash_entry *,
- int, asection *, int, bfd_vma, bfd_vma);
- static bool allocate_dynrel_entries
- (struct elf_link_hash_entry *, void *);
- static bool elf64_hppa_finalize_dynreloc
- (struct elf_link_hash_entry *, void *);
- static bool get_opd
- (bfd *, struct bfd_link_info *, struct elf64_hppa_link_hash_table *);
- static bool get_plt
- (bfd *, struct bfd_link_info *, struct elf64_hppa_link_hash_table *);
- static bool get_dlt
- (bfd *, struct bfd_link_info *, struct elf64_hppa_link_hash_table *);
- static bool get_stub
- (bfd *, struct bfd_link_info *, struct elf64_hppa_link_hash_table *);
- static int elf64_hppa_elf_get_symbol_type
- (Elf_Internal_Sym *, int);
- /* Initialize an entry in the link hash table. */
- static struct bfd_hash_entry *
- hppa64_link_hash_newfunc (struct bfd_hash_entry *entry,
- struct bfd_hash_table *table,
- const char *string)
- {
- /* Allocate the structure if it has not already been allocated by a
- subclass. */
- if (entry == NULL)
- {
- entry = bfd_hash_allocate (table,
- sizeof (struct elf64_hppa_link_hash_entry));
- if (entry == NULL)
- return entry;
- }
- /* Call the allocation method of the superclass. */
- entry = _bfd_elf_link_hash_newfunc (entry, table, string);
- if (entry != NULL)
- {
- struct elf64_hppa_link_hash_entry *hh;
- /* Initialize our local data. All zeros. */
- hh = hppa_elf_hash_entry (entry);
- memset (&hh->dlt_offset, 0,
- (sizeof (struct elf64_hppa_link_hash_entry)
- - offsetof (struct elf64_hppa_link_hash_entry, dlt_offset)));
- }
- return entry;
- }
- /* Create the derived linker hash table. The PA64 ELF port uses this
- derived hash table to keep information specific to the PA ElF
- linker (without using static variables). */
- static struct bfd_link_hash_table*
- elf64_hppa_hash_table_create (bfd *abfd)
- {
- struct elf64_hppa_link_hash_table *htab;
- size_t amt = sizeof (*htab);
- htab = bfd_zmalloc (amt);
- if (htab == NULL)
- return NULL;
- if (!_bfd_elf_link_hash_table_init (&htab->root, abfd,
- hppa64_link_hash_newfunc,
- sizeof (struct elf64_hppa_link_hash_entry),
- HPPA64_ELF_DATA))
- {
- free (htab);
- return NULL;
- }
- htab->root.dt_pltgot_required = true;
- htab->text_segment_base = (bfd_vma) -1;
- htab->data_segment_base = (bfd_vma) -1;
- return &htab->root.root;
- }
- /* Return nonzero if ABFD represents a PA2.0 ELF64 file.
- Additionally we set the default architecture and machine. */
- static bool
- elf64_hppa_object_p (bfd *abfd)
- {
- Elf_Internal_Ehdr * i_ehdrp;
- unsigned int flags;
- i_ehdrp = elf_elfheader (abfd);
- if (strcmp (bfd_get_target (abfd), "elf64-hppa-linux") == 0)
- {
- /* GCC on hppa-linux produces binaries with OSABI=GNU,
- but the kernel produces corefiles with OSABI=SysV. */
- if (i_ehdrp->e_ident[EI_OSABI] != ELFOSABI_GNU
- && i_ehdrp->e_ident[EI_OSABI] != ELFOSABI_NONE) /* aka SYSV */
- return false;
- }
- else
- {
- /* HPUX produces binaries with OSABI=HPUX,
- but the kernel produces corefiles with OSABI=SysV. */
- if (i_ehdrp->e_ident[EI_OSABI] != ELFOSABI_HPUX
- && i_ehdrp->e_ident[EI_OSABI] != ELFOSABI_NONE) /* aka SYSV */
- return false;
- }
- flags = i_ehdrp->e_flags;
- switch (flags & (EF_PARISC_ARCH | EF_PARISC_WIDE))
- {
- case EFA_PARISC_1_0:
- return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 10);
- case EFA_PARISC_1_1:
- return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 11);
- case EFA_PARISC_2_0:
- if (i_ehdrp->e_ident[EI_CLASS] == ELFCLASS64)
- return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 25);
- else
- return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 20);
- case EFA_PARISC_2_0 | EF_PARISC_WIDE:
- return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 25);
- }
- /* Don't be fussy. */
- return true;
- }
- /* Given section type (hdr->sh_type), return a boolean indicating
- whether or not the section is an elf64-hppa specific section. */
- static bool
- elf64_hppa_section_from_shdr (bfd *abfd,
- Elf_Internal_Shdr *hdr,
- const char *name,
- int shindex)
- {
- switch (hdr->sh_type)
- {
- case SHT_PARISC_EXT:
- if (strcmp (name, ".PARISC.archext") != 0)
- return false;
- break;
- case SHT_PARISC_UNWIND:
- if (strcmp (name, ".PARISC.unwind") != 0)
- return false;
- break;
- case SHT_PARISC_DOC:
- case SHT_PARISC_ANNOT:
- default:
- return false;
- }
- if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
- return false;
- return ((hdr->sh_flags & SHF_PARISC_SHORT) == 0
- || bfd_set_section_flags (hdr->bfd_section,
- hdr->bfd_section->flags | SEC_SMALL_DATA));
- }
- /* SEC is a section containing relocs for an input BFD when linking; return
- a suitable section for holding relocs in the output BFD for a link. */
- static bool
- get_reloc_section (bfd *abfd,
- struct elf64_hppa_link_hash_table *hppa_info,
- asection *sec)
- {
- const char *srel_name;
- asection *srel;
- bfd *dynobj;
- srel_name = (bfd_elf_string_from_elf_section
- (abfd, elf_elfheader(abfd)->e_shstrndx,
- _bfd_elf_single_rel_hdr(sec)->sh_name));
- if (srel_name == NULL)
- return false;
- dynobj = hppa_info->root.dynobj;
- if (!dynobj)
- hppa_info->root.dynobj = dynobj = abfd;
- srel = bfd_get_linker_section (dynobj, srel_name);
- if (srel == NULL)
- {
- srel = bfd_make_section_anyway_with_flags (dynobj, srel_name,
- (SEC_ALLOC
- | SEC_LOAD
- | SEC_HAS_CONTENTS
- | SEC_IN_MEMORY
- | SEC_LINKER_CREATED
- | SEC_READONLY));
- if (srel == NULL
- || !bfd_set_section_alignment (srel, 3))
- return false;
- }
- hppa_info->other_rel_sec = srel;
- return true;
- }
- /* Add a new entry to the list of dynamic relocations against DYN_H.
- We use this to keep a record of all the FPTR relocations against a
- particular symbol so that we can create FPTR relocations in the
- output file. */
- static bool
- count_dyn_reloc (bfd *abfd,
- struct elf64_hppa_link_hash_entry *hh,
- int type,
- asection *sec,
- int sec_symndx,
- bfd_vma offset,
- bfd_vma addend)
- {
- struct elf64_hppa_dyn_reloc_entry *rent;
- rent = (struct elf64_hppa_dyn_reloc_entry *)
- bfd_alloc (abfd, (bfd_size_type) sizeof (*rent));
- if (!rent)
- return false;
- rent->next = hh->reloc_entries;
- rent->type = type;
- rent->sec = sec;
- rent->sec_symndx = sec_symndx;
- rent->offset = offset;
- rent->addend = addend;
- hh->reloc_entries = rent;
- return true;
- }
- /* Return a pointer to the local DLT, PLT and OPD reference counts
- for ABFD. Returns NULL if the storage allocation fails. */
- static bfd_signed_vma *
- hppa64_elf_local_refcounts (bfd *abfd)
- {
- Elf_Internal_Shdr *symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
- bfd_signed_vma *local_refcounts;
- local_refcounts = elf_local_got_refcounts (abfd);
- if (local_refcounts == NULL)
- {
- bfd_size_type size;
- /* Allocate space for local DLT, PLT and OPD reference
- counts. Done this way to save polluting elf_obj_tdata
- with another target specific pointer. */
- size = symtab_hdr->sh_info;
- size *= 3 * sizeof (bfd_signed_vma);
- local_refcounts = bfd_zalloc (abfd, size);
- elf_local_got_refcounts (abfd) = local_refcounts;
- }
- return local_refcounts;
- }
- /* Scan the RELOCS and record the type of dynamic entries that each
- referenced symbol needs. */
- static bool
- elf64_hppa_check_relocs (bfd *abfd,
- struct bfd_link_info *info,
- asection *sec,
- const Elf_Internal_Rela *relocs)
- {
- struct elf64_hppa_link_hash_table *hppa_info;
- const Elf_Internal_Rela *relend;
- Elf_Internal_Shdr *symtab_hdr;
- const Elf_Internal_Rela *rel;
- unsigned int sec_symndx;
- if (bfd_link_relocatable (info))
- return true;
- /* If this is the first dynamic object found in the link, create
- the special sections required for dynamic linking. */
- if (! elf_hash_table (info)->dynamic_sections_created)
- {
- if (! _bfd_elf_link_create_dynamic_sections (abfd, info))
- return false;
- }
- hppa_info = hppa_link_hash_table (info);
- if (hppa_info == NULL)
- return false;
- symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
- /* If necessary, build a new table holding section symbols indices
- for this BFD. */
- if (bfd_link_pic (info) && hppa_info->section_syms_bfd != abfd)
- {
- unsigned long i;
- unsigned int highest_shndx;
- Elf_Internal_Sym *local_syms = NULL;
- Elf_Internal_Sym *isym, *isymend;
- bfd_size_type amt;
- /* We're done with the old cache of section index to section symbol
- index information. Free it.
- ?!? Note we leak the last section_syms array. Presumably we
- could free it in one of the later routines in this file. */
- free (hppa_info->section_syms);
- /* Read this BFD's local symbols. */
- if (symtab_hdr->sh_info != 0)
- {
- local_syms = (Elf_Internal_Sym *) symtab_hdr->contents;
- if (local_syms == NULL)
- local_syms = bfd_elf_get_elf_syms (abfd, symtab_hdr,
- symtab_hdr->sh_info, 0,
- NULL, NULL, NULL);
- if (local_syms == NULL)
- return false;
- }
- /* Record the highest section index referenced by the local symbols. */
- highest_shndx = 0;
- isymend = local_syms + symtab_hdr->sh_info;
- for (isym = local_syms; isym < isymend; isym++)
- {
- if (isym->st_shndx > highest_shndx
- && isym->st_shndx < SHN_LORESERVE)
- highest_shndx = isym->st_shndx;
- }
- /* Allocate an array to hold the section index to section symbol index
- mapping. Bump by one since we start counting at zero. */
- highest_shndx++;
- amt = highest_shndx;
- amt *= sizeof (int);
- hppa_info->section_syms = (int *) bfd_malloc (amt);
- /* Now walk the local symbols again. If we find a section symbol,
- record the index of the symbol into the section_syms array. */
- for (i = 0, isym = local_syms; isym < isymend; i++, isym++)
- {
- if (ELF_ST_TYPE (isym->st_info) == STT_SECTION)
- hppa_info->section_syms[isym->st_shndx] = i;
- }
- /* We are finished with the local symbols. */
- if (local_syms != NULL
- && symtab_hdr->contents != (unsigned char *) local_syms)
- {
- if (! info->keep_memory)
- free (local_syms);
- else
- {
- /* Cache the symbols for elf_link_input_bfd. */
- symtab_hdr->contents = (unsigned char *) local_syms;
- }
- }
- /* Record which BFD we built the section_syms mapping for. */
- hppa_info->section_syms_bfd = abfd;
- }
- /* Record the symbol index for this input section. We may need it for
- relocations when building shared libraries. When not building shared
- libraries this value is never really used, but assign it to zero to
- prevent out of bounds memory accesses in other routines. */
- if (bfd_link_pic (info))
- {
- sec_symndx = _bfd_elf_section_from_bfd_section (abfd, sec);
- /* If we did not find a section symbol for this section, then
- something went terribly wrong above. */
- if (sec_symndx == SHN_BAD)
- return false;
- if (sec_symndx < SHN_LORESERVE)
- sec_symndx = hppa_info->section_syms[sec_symndx];
- else
- sec_symndx = 0;
- }
- else
- sec_symndx = 0;
- relend = relocs + sec->reloc_count;
- for (rel = relocs; rel < relend; ++rel)
- {
- enum
- {
- NEED_DLT = 1,
- NEED_PLT = 2,
- NEED_STUB = 4,
- NEED_OPD = 8,
- NEED_DYNREL = 16,
- };
- unsigned long r_symndx = ELF64_R_SYM (rel->r_info);
- struct elf64_hppa_link_hash_entry *hh;
- int need_entry;
- bool maybe_dynamic;
- int dynrel_type = R_PARISC_NONE;
- static reloc_howto_type *howto;
- if (r_symndx >= symtab_hdr->sh_info)
- {
- /* We're dealing with a global symbol -- find its hash entry
- and mark it as being referenced. */
- long indx = r_symndx - symtab_hdr->sh_info;
- hh = hppa_elf_hash_entry (elf_sym_hashes (abfd)[indx]);
- while (hh->eh.root.type == bfd_link_hash_indirect
- || hh->eh.root.type == bfd_link_hash_warning)
- hh = hppa_elf_hash_entry (hh->eh.root.u.i.link);
- /* PR15323, ref flags aren't set for references in the same
- object. */
- hh->eh.ref_regular = 1;
- }
- else
- hh = NULL;
- /* We can only get preliminary data on whether a symbol is
- locally or externally defined, as not all of the input files
- have yet been processed. Do something with what we know, as
- this may help reduce memory usage and processing time later. */
- maybe_dynamic = false;
- if (hh && ((bfd_link_pic (info)
- && (!info->symbolic
- || info->unresolved_syms_in_shared_libs == RM_IGNORE))
- || !hh->eh.def_regular
- || hh->eh.root.type == bfd_link_hash_defweak))
- maybe_dynamic = true;
- howto = elf_hppa_howto_table + ELF64_R_TYPE (rel->r_info);
- need_entry = 0;
- switch (howto->type)
- {
- /* These are simple indirect references to symbols through the
- DLT. We need to create a DLT entry for any symbols which
- appears in a DLTIND relocation. */
- case R_PARISC_DLTIND21L:
- case R_PARISC_DLTIND14R:
- case R_PARISC_DLTIND14F:
- case R_PARISC_DLTIND14WR:
- case R_PARISC_DLTIND14DR:
- need_entry = NEED_DLT;
- break;
- /* ?!? These need a DLT entry. But I have no idea what to do with
- the "link time TP value. */
- case R_PARISC_LTOFF_TP21L:
- case R_PARISC_LTOFF_TP14R:
- case R_PARISC_LTOFF_TP14F:
- case R_PARISC_LTOFF_TP64:
- case R_PARISC_LTOFF_TP14WR:
- case R_PARISC_LTOFF_TP14DR:
- case R_PARISC_LTOFF_TP16F:
- case R_PARISC_LTOFF_TP16WF:
- case R_PARISC_LTOFF_TP16DF:
- need_entry = NEED_DLT;
- break;
- /* These are function calls. Depending on their precise target we
- may need to make a stub for them. The stub uses the PLT, so we
- need to create PLT entries for these symbols too. */
- case R_PARISC_PCREL12F:
- case R_PARISC_PCREL17F:
- case R_PARISC_PCREL22F:
- case R_PARISC_PCREL32:
- case R_PARISC_PCREL64:
- case R_PARISC_PCREL21L:
- case R_PARISC_PCREL17R:
- case R_PARISC_PCREL17C:
- case R_PARISC_PCREL14R:
- case R_PARISC_PCREL14F:
- case R_PARISC_PCREL22C:
- case R_PARISC_PCREL14WR:
- case R_PARISC_PCREL14DR:
- case R_PARISC_PCREL16F:
- case R_PARISC_PCREL16WF:
- case R_PARISC_PCREL16DF:
- /* Function calls might need to go through the .plt, and
- might need a long branch stub. */
- if (hh != NULL && hh->eh.type != STT_PARISC_MILLI)
- need_entry = (NEED_PLT | NEED_STUB);
- else
- need_entry = 0;
- break;
- case R_PARISC_PLTOFF21L:
- case R_PARISC_PLTOFF14R:
- case R_PARISC_PLTOFF14F:
- case R_PARISC_PLTOFF14WR:
- case R_PARISC_PLTOFF14DR:
- case R_PARISC_PLTOFF16F:
- case R_PARISC_PLTOFF16WF:
- case R_PARISC_PLTOFF16DF:
- need_entry = (NEED_PLT);
- break;
- case R_PARISC_DIR64:
- if (bfd_link_pic (info) || maybe_dynamic)
- need_entry = (NEED_DYNREL);
- dynrel_type = R_PARISC_DIR64;
- break;
- /* This is an indirect reference through the DLT to get the address
- of a OPD descriptor. Thus we need to make a DLT entry that points
- to an OPD entry. */
- case R_PARISC_LTOFF_FPTR21L:
- case R_PARISC_LTOFF_FPTR14R:
- case R_PARISC_LTOFF_FPTR14WR:
- case R_PARISC_LTOFF_FPTR14DR:
- case R_PARISC_LTOFF_FPTR32:
- case R_PARISC_LTOFF_FPTR64:
- case R_PARISC_LTOFF_FPTR16F:
- case R_PARISC_LTOFF_FPTR16WF:
- case R_PARISC_LTOFF_FPTR16DF:
- if (bfd_link_pic (info) || maybe_dynamic)
- need_entry = (NEED_DLT | NEED_OPD | NEED_PLT);
- else
- need_entry = (NEED_DLT | NEED_OPD | NEED_PLT);
- dynrel_type = R_PARISC_FPTR64;
- break;
- /* This is a simple OPD entry. */
- case R_PARISC_FPTR64:
- if (bfd_link_pic (info) || maybe_dynamic)
- need_entry = (NEED_OPD | NEED_PLT | NEED_DYNREL);
- else
- need_entry = (NEED_OPD | NEED_PLT);
- dynrel_type = R_PARISC_FPTR64;
- break;
- /* Add more cases as needed. */
- }
- if (!need_entry)
- continue;
- if (hh)
- {
- /* Stash away enough information to be able to find this symbol
- regardless of whether or not it is local or global. */
- hh->owner = abfd;
- hh->sym_indx = r_symndx;
- }
- /* Create what's needed. */
- if (need_entry & NEED_DLT)
- {
- /* Allocate space for a DLT entry, as well as a dynamic
- relocation for this entry. */
- if (! hppa_info->dlt_sec
- && ! get_dlt (abfd, info, hppa_info))
- goto err_out;
- if (hh != NULL)
- {
- hh->want_dlt = 1;
- hh->eh.got.refcount += 1;
- }
- else
- {
- bfd_signed_vma *local_dlt_refcounts;
- /* This is a DLT entry for a local symbol. */
- local_dlt_refcounts = hppa64_elf_local_refcounts (abfd);
- if (local_dlt_refcounts == NULL)
- return false;
- local_dlt_refcounts[r_symndx] += 1;
- }
- }
- if (need_entry & NEED_PLT)
- {
- if (! hppa_info->root.splt
- && ! get_plt (abfd, info, hppa_info))
- goto err_out;
- if (hh != NULL)
- {
- hh->want_plt = 1;
- hh->eh.needs_plt = 1;
- hh->eh.plt.refcount += 1;
- }
- else
- {
- bfd_signed_vma *local_dlt_refcounts;
- bfd_signed_vma *local_plt_refcounts;
- /* This is a PLT entry for a local symbol. */
- local_dlt_refcounts = hppa64_elf_local_refcounts (abfd);
- if (local_dlt_refcounts == NULL)
- return false;
- local_plt_refcounts = local_dlt_refcounts + symtab_hdr->sh_info;
- local_plt_refcounts[r_symndx] += 1;
- }
- }
- if (need_entry & NEED_STUB)
- {
- if (! hppa_info->stub_sec
- && ! get_stub (abfd, info, hppa_info))
- goto err_out;
- if (hh)
- hh->want_stub = 1;
- }
- if (need_entry & NEED_OPD)
- {
- if (! hppa_info->opd_sec
- && ! get_opd (abfd, info, hppa_info))
- goto err_out;
- /* FPTRs are not allocated by the dynamic linker for PA64,
- though it is possible that will change in the future. */
- if (hh != NULL)
- hh->want_opd = 1;
- else
- {
- bfd_signed_vma *local_dlt_refcounts;
- bfd_signed_vma *local_opd_refcounts;
- /* This is a OPD for a local symbol. */
- local_dlt_refcounts = hppa64_elf_local_refcounts (abfd);
- if (local_dlt_refcounts == NULL)
- return false;
- local_opd_refcounts = (local_dlt_refcounts
- + 2 * symtab_hdr->sh_info);
- local_opd_refcounts[r_symndx] += 1;
- }
- }
- /* Add a new dynamic relocation to the chain of dynamic
- relocations for this symbol. */
- if ((need_entry & NEED_DYNREL) && (sec->flags & SEC_ALLOC))
- {
- if (! hppa_info->other_rel_sec
- && ! get_reloc_section (abfd, hppa_info, sec))
- goto err_out;
- /* Count dynamic relocations against global symbols. */
- if (hh != NULL
- && !count_dyn_reloc (abfd, hh, dynrel_type, sec,
- sec_symndx, rel->r_offset, rel->r_addend))
- goto err_out;
- /* If we are building a shared library and we just recorded
- a dynamic R_PARISC_FPTR64 relocation, then make sure the
- section symbol for this section ends up in the dynamic
- symbol table. */
- if (bfd_link_pic (info) && dynrel_type == R_PARISC_FPTR64
- && ! (bfd_elf_link_record_local_dynamic_symbol
- (info, abfd, sec_symndx)))
- return false;
- }
- }
- return true;
- err_out:
- return false;
- }
- struct elf64_hppa_allocate_data
- {
- struct bfd_link_info *info;
- bfd_size_type ofs;
- };
- /* Should we do dynamic things to this symbol? */
- static bool
- elf64_hppa_dynamic_symbol_p (struct elf_link_hash_entry *eh,
- struct bfd_link_info *info)
- {
- /* ??? What, if anything, needs to happen wrt STV_PROTECTED symbols
- and relocations that retrieve a function descriptor? Assume the
- worst for now. */
- if (_bfd_elf_dynamic_symbol_p (eh, info, 1))
- {
- /* ??? Why is this here and not elsewhere is_local_label_name. */
- if (eh->root.root.string[0] == '$' && eh->root.root.string[1] == '$')
- return false;
- return true;
- }
- else
- return false;
- }
- /* Mark all functions exported by this file so that we can later allocate
- entries in .opd for them. */
- static bool
- elf64_hppa_mark_exported_functions (struct elf_link_hash_entry *eh, void *data)
- {
- struct elf64_hppa_link_hash_entry *hh = hppa_elf_hash_entry (eh);
- struct bfd_link_info *info = (struct bfd_link_info *)data;
- struct elf64_hppa_link_hash_table *hppa_info;
- hppa_info = hppa_link_hash_table (info);
- if (hppa_info == NULL)
- return false;
- if (eh
- && (eh->root.type == bfd_link_hash_defined
- || eh->root.type == bfd_link_hash_defweak)
- && eh->root.u.def.section->output_section != NULL
- && eh->type == STT_FUNC)
- {
- if (! hppa_info->opd_sec
- && ! get_opd (hppa_info->root.dynobj, info, hppa_info))
- return false;
- hh->want_opd = 1;
- /* Put a flag here for output_symbol_hook. */
- hh->st_shndx = -1;
- eh->needs_plt = 1;
- }
- return true;
- }
- /* Allocate space for a DLT entry. */
- static bool
- allocate_global_data_dlt (struct elf_link_hash_entry *eh, void *data)
- {
- struct elf64_hppa_link_hash_entry *hh = hppa_elf_hash_entry (eh);
- struct elf64_hppa_allocate_data *x = (struct elf64_hppa_allocate_data *)data;
- if (hh->want_dlt)
- {
- if (bfd_link_pic (x->info))
- {
- /* Possibly add the symbol to the local dynamic symbol
- table since we might need to create a dynamic relocation
- against it. */
- if (eh->dynindx == -1 && eh->type != STT_PARISC_MILLI)
- {
- bfd *owner = eh->root.u.def.section->owner;
- if (! (bfd_elf_link_record_local_dynamic_symbol
- (x->info, owner, hh->sym_indx)))
- return false;
- }
- }
- hh->dlt_offset = x->ofs;
- x->ofs += DLT_ENTRY_SIZE;
- }
- return true;
- }
- /* Allocate space for a DLT.PLT entry. */
- static bool
- allocate_global_data_plt (struct elf_link_hash_entry *eh, void *data)
- {
- struct elf64_hppa_link_hash_entry *hh = hppa_elf_hash_entry (eh);
- struct elf64_hppa_allocate_data *x = (struct elf64_hppa_allocate_data *) data;
- if (hh->want_plt
- && elf64_hppa_dynamic_symbol_p (eh, x->info)
- && !((eh->root.type == bfd_link_hash_defined
- || eh->root.type == bfd_link_hash_defweak)
- && eh->root.u.def.section->output_section != NULL))
- {
- hh->plt_offset = x->ofs;
- x->ofs += PLT_ENTRY_SIZE;
- if (hh->plt_offset < 0x2000)
- {
- struct elf64_hppa_link_hash_table *hppa_info;
- hppa_info = hppa_link_hash_table (x->info);
- if (hppa_info == NULL)
- return false;
- hppa_info->gp_offset = hh->plt_offset;
- }
- }
- else
- hh->want_plt = 0;
- return true;
- }
- /* Allocate space for a STUB entry. */
- static bool
- allocate_global_data_stub (struct elf_link_hash_entry *eh, void *data)
- {
- struct elf64_hppa_link_hash_entry *hh = hppa_elf_hash_entry (eh);
- struct elf64_hppa_allocate_data *x = (struct elf64_hppa_allocate_data *)data;
- if (hh->want_stub
- && elf64_hppa_dynamic_symbol_p (eh, x->info)
- && !((eh->root.type == bfd_link_hash_defined
- || eh->root.type == bfd_link_hash_defweak)
- && eh->root.u.def.section->output_section != NULL))
- {
- hh->stub_offset = x->ofs;
- x->ofs += sizeof (plt_stub);
- }
- else
- hh->want_stub = 0;
- return true;
- }
- /* Allocate space for a FPTR entry. */
- static bool
- allocate_global_data_opd (struct elf_link_hash_entry *eh, void *data)
- {
- struct elf64_hppa_link_hash_entry *hh = hppa_elf_hash_entry (eh);
- struct elf64_hppa_allocate_data *x = (struct elf64_hppa_allocate_data *)data;
- if (hh && hh->want_opd)
- {
- /* We never need an opd entry for a symbol which is not
- defined by this output file. */
- if (hh && (hh->eh.root.type == bfd_link_hash_undefined
- || hh->eh.root.type == bfd_link_hash_undefweak
- || hh->eh.root.u.def.section->output_section == NULL))
- hh->want_opd = 0;
- /* If we are creating a shared library, took the address of a local
- function or might export this function from this object file, then
- we have to create an opd descriptor. */
- else if (bfd_link_pic (x->info)
- || hh == NULL
- || (hh->eh.dynindx == -1 && hh->eh.type != STT_PARISC_MILLI)
- || (hh->eh.root.type == bfd_link_hash_defined
- || hh->eh.root.type == bfd_link_hash_defweak))
- {
- /* If we are creating a shared library, then we will have to
- create a runtime relocation for the symbol to properly
- initialize the .opd entry. Make sure the symbol gets
- added to the dynamic symbol table. */
- if (bfd_link_pic (x->info)
- && (hh == NULL || (hh->eh.dynindx == -1)))
- {
- bfd *owner;
- /* PR 6511: Default to using the dynamic symbol table. */
- owner = (hh->owner ? hh->owner: eh->root.u.def.section->owner);
- if (!bfd_elf_link_record_local_dynamic_symbol
- (x->info, owner, hh->sym_indx))
- return false;
- }
- /* This may not be necessary or desirable anymore now that
- we have some support for dealing with section symbols
- in dynamic relocs. But name munging does make the result
- much easier to debug. ie, the EPLT reloc will reference
- a symbol like .foobar, instead of .text + offset. */
- if (bfd_link_pic (x->info) && eh)
- {
- char *new_name;
- struct elf_link_hash_entry *nh;
- new_name = concat (".", eh->root.root.string, NULL);
- nh = elf_link_hash_lookup (elf_hash_table (x->info),
- new_name, true, true, true);
- free (new_name);
- nh->root.type = eh->root.type;
- nh->root.u.def.value = eh->root.u.def.value;
- nh->root.u.def.section = eh->root.u.def.section;
- if (! bfd_elf_link_record_dynamic_symbol (x->info, nh))
- return false;
- }
- hh->opd_offset = x->ofs;
- x->ofs += OPD_ENTRY_SIZE;
- }
- /* Otherwise we do not need an opd entry. */
- else
- hh->want_opd = 0;
- }
- return true;
- }
- /* HP requires the EI_OSABI field to be filled in. The assignment to
- EI_ABIVERSION may not be strictly necessary. */
- static bool
- elf64_hppa_init_file_header (bfd *abfd, struct bfd_link_info *info)
- {
- Elf_Internal_Ehdr *i_ehdrp;
- if (!_bfd_elf_init_file_header (abfd, info))
- return false;
- i_ehdrp = elf_elfheader (abfd);
- i_ehdrp->e_ident[EI_OSABI] = get_elf_backend_data (abfd)->elf_osabi;
- i_ehdrp->e_ident[EI_ABIVERSION] = 1;
- return true;
- }
- /* Create function descriptor section (.opd). This section is called .opd
- because it contains "official procedure descriptors". The "official"
- refers to the fact that these descriptors are used when taking the address
- of a procedure, thus ensuring a unique address for each procedure. */
- static bool
- get_opd (bfd *abfd,
- struct bfd_link_info *info ATTRIBUTE_UNUSED,
- struct elf64_hppa_link_hash_table *hppa_info)
- {
- asection *opd;
- bfd *dynobj;
- opd = hppa_info->opd_sec;
- if (!opd)
- {
- dynobj = hppa_info->root.dynobj;
- if (!dynobj)
- hppa_info->root.dynobj = dynobj = abfd;
- opd = bfd_make_section_anyway_with_flags (dynobj, ".opd",
- (SEC_ALLOC
- | SEC_LOAD
- | SEC_HAS_CONTENTS
- | SEC_IN_MEMORY
- | SEC_LINKER_CREATED));
- if (!opd
- || !bfd_set_section_alignment (opd, 3))
- {
- BFD_ASSERT (0);
- return false;
- }
- hppa_info->opd_sec = opd;
- }
- return true;
- }
- /* Create the PLT section. */
- static bool
- get_plt (bfd *abfd,
- struct bfd_link_info *info ATTRIBUTE_UNUSED,
- struct elf64_hppa_link_hash_table *hppa_info)
- {
- asection *plt;
- bfd *dynobj;
- plt = hppa_info->root.splt;
- if (!plt)
- {
- dynobj = hppa_info->root.dynobj;
- if (!dynobj)
- hppa_info->root.dynobj = dynobj = abfd;
- plt = bfd_make_section_anyway_with_flags (dynobj, ".plt",
- (SEC_ALLOC
- | SEC_LOAD
- | SEC_HAS_CONTENTS
- | SEC_IN_MEMORY
- | SEC_LINKER_CREATED));
- if (!plt
- || !bfd_set_section_alignment (plt, 3))
- {
- BFD_ASSERT (0);
- return false;
- }
- hppa_info->root.splt = plt;
- }
- return true;
- }
- /* Create the DLT section. */
- static bool
- get_dlt (bfd *abfd,
- struct bfd_link_info *info ATTRIBUTE_UNUSED,
- struct elf64_hppa_link_hash_table *hppa_info)
- {
- asection *dlt;
- bfd *dynobj;
- dlt = hppa_info->dlt_sec;
- if (!dlt)
- {
- dynobj = hppa_info->root.dynobj;
- if (!dynobj)
- hppa_info->root.dynobj = dynobj = abfd;
- dlt = bfd_make_section_anyway_with_flags (dynobj, ".dlt",
- (SEC_ALLOC
- | SEC_LOAD
- | SEC_HAS_CONTENTS
- | SEC_IN_MEMORY
- | SEC_LINKER_CREATED));
- if (!dlt
- || !bfd_set_section_alignment (dlt, 3))
- {
- BFD_ASSERT (0);
- return false;
- }
- hppa_info->dlt_sec = dlt;
- }
- return true;
- }
- /* Create the stubs section. */
- static bool
- get_stub (bfd *abfd,
- struct bfd_link_info *info ATTRIBUTE_UNUSED,
- struct elf64_hppa_link_hash_table *hppa_info)
- {
- asection *stub;
- bfd *dynobj;
- stub = hppa_info->stub_sec;
- if (!stub)
- {
- dynobj = hppa_info->root.dynobj;
- if (!dynobj)
- hppa_info->root.dynobj = dynobj = abfd;
- stub = bfd_make_section_anyway_with_flags (dynobj, ".stub",
- (SEC_ALLOC | SEC_LOAD
- | SEC_HAS_CONTENTS
- | SEC_IN_MEMORY
- | SEC_READONLY
- | SEC_LINKER_CREATED));
- if (!stub
- || !bfd_set_section_alignment (stub, 3))
- {
- BFD_ASSERT (0);
- return false;
- }
- hppa_info->stub_sec = stub;
- }
- return true;
- }
- /* Create sections necessary for dynamic linking. This is only a rough
- cut and will likely change as we learn more about the somewhat
- unusual dynamic linking scheme HP uses.
- .stub:
- Contains code to implement cross-space calls. The first time one
- of the stubs is used it will call into the dynamic linker, later
- calls will go straight to the target.
- The only stub we support right now looks like
- ldd OFFSET(%dp),%r1
- bve %r0(%r1)
- ldd OFFSET+8(%dp),%dp
- Other stubs may be needed in the future. We may want the remove
- the break/nop instruction. It is only used right now to keep the
- offset of a .plt entry and a .stub entry in sync.
- .dlt:
- This is what most people call the .got. HP used a different name.
- Losers.
- .rela.dlt:
- Relocations for the DLT.
- .plt:
- Function pointers as address,gp pairs.
- .rela.plt:
- Should contain dynamic IPLT (and EPLT?) relocations.
- .opd:
- FPTRS
- .rela.opd:
- EPLT relocations for symbols exported from shared libraries. */
- static bool
- elf64_hppa_create_dynamic_sections (bfd *abfd,
- struct bfd_link_info *info)
- {
- asection *s;
- struct elf64_hppa_link_hash_table *hppa_info;
- hppa_info = hppa_link_hash_table (info);
- if (hppa_info == NULL)
- return false;
- if (! get_stub (abfd, info, hppa_info))
- return false;
- if (! get_dlt (abfd, info, hppa_info))
- return false;
- if (! get_plt (abfd, info, hppa_info))
- return false;
- if (! get_opd (abfd, info, hppa_info))
- return false;
- s = bfd_make_section_anyway_with_flags (abfd, ".rela.dlt",
- (SEC_ALLOC | SEC_LOAD
- | SEC_HAS_CONTENTS
- | SEC_IN_MEMORY
- | SEC_READONLY
- | SEC_LINKER_CREATED));
- if (s == NULL
- || !bfd_set_section_alignment (s, 3))
- return false;
- hppa_info->dlt_rel_sec = s;
- s = bfd_make_section_anyway_with_flags (abfd, ".rela.plt",
- (SEC_ALLOC | SEC_LOAD
- | SEC_HAS_CONTENTS
- | SEC_IN_MEMORY
- | SEC_READONLY
- | SEC_LINKER_CREATED));
- if (s == NULL
- || !bfd_set_section_alignment (s, 3))
- return false;
- hppa_info->root.srelplt = s;
- s = bfd_make_section_anyway_with_flags (abfd, ".rela.data",
- (SEC_ALLOC | SEC_LOAD
- | SEC_HAS_CONTENTS
- | SEC_IN_MEMORY
- | SEC_READONLY
- | SEC_LINKER_CREATED));
- if (s == NULL
- || !bfd_set_section_alignment (s, 3))
- return false;
- hppa_info->other_rel_sec = s;
- s = bfd_make_section_anyway_with_flags (abfd, ".rela.opd",
- (SEC_ALLOC | SEC_LOAD
- | SEC_HAS_CONTENTS
- | SEC_IN_MEMORY
- | SEC_READONLY
- | SEC_LINKER_CREATED));
- if (s == NULL
- || !bfd_set_section_alignment (s, 3))
- return false;
- hppa_info->opd_rel_sec = s;
- return true;
- }
- /* Allocate dynamic relocations for those symbols that turned out
- to be dynamic. */
- static bool
- allocate_dynrel_entries (struct elf_link_hash_entry *eh, void *data)
- {
- struct elf64_hppa_link_hash_entry *hh = hppa_elf_hash_entry (eh);
- struct elf64_hppa_allocate_data *x = (struct elf64_hppa_allocate_data *)data;
- struct elf64_hppa_link_hash_table *hppa_info;
- struct elf64_hppa_dyn_reloc_entry *rent;
- bool dynamic_symbol, shared;
- hppa_info = hppa_link_hash_table (x->info);
- if (hppa_info == NULL)
- return false;
- dynamic_symbol = elf64_hppa_dynamic_symbol_p (eh, x->info);
- shared = bfd_link_pic (x->info);
- /* We may need to allocate relocations for a non-dynamic symbol
- when creating a shared library. */
- if (!dynamic_symbol && !shared)
- return true;
- /* Take care of the normal data relocations. */
- for (rent = hh->reloc_entries; rent; rent = rent->next)
- {
- /* Allocate one iff we are building a shared library, the relocation
- isn't a R_PARISC_FPTR64, or we don't want an opd entry. */
- if (!shared && rent->type == R_PARISC_FPTR64 && hh->want_opd)
- continue;
- hppa_info->other_rel_sec->size += sizeof (Elf64_External_Rela);
- /* Make sure this symbol gets into the dynamic symbol table if it is
- not already recorded. ?!? This should not be in the loop since
- the symbol need only be added once. */
- if (eh->dynindx == -1 && eh->type != STT_PARISC_MILLI)
- if (!bfd_elf_link_record_local_dynamic_symbol
- (x->info, rent->sec->owner, hh->sym_indx))
- return false;
- }
- /* Take care of the GOT and PLT relocations. */
- if ((dynamic_symbol || shared) && hh->want_dlt)
- hppa_info->dlt_rel_sec->size += sizeof (Elf64_External_Rela);
- /* If we are building a shared library, then every symbol that has an
- opd entry will need an EPLT relocation to relocate the symbol's address
- and __gp value based on the runtime load address. */
- if (shared && hh->want_opd)
- hppa_info->opd_rel_sec->size += sizeof (Elf64_External_Rela);
- if (hh->want_plt && dynamic_symbol)
- {
- bfd_size_type t = 0;
- /* Dynamic symbols get one IPLT relocation. Local symbols in
- shared libraries get two REL relocations. Local symbols in
- main applications get nothing. */
- if (dynamic_symbol)
- t = sizeof (Elf64_External_Rela);
- else if (shared)
- t = 2 * sizeof (Elf64_External_Rela);
- hppa_info->root.srelplt->size += t;
- }
- return true;
- }
- /* Adjust a symbol defined by a dynamic object and referenced by a
- regular object. */
- static bool
- elf64_hppa_adjust_dynamic_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED,
- struct elf_link_hash_entry *eh)
- {
- /* ??? Undefined symbols with PLT entries should be re-defined
- to be the PLT entry. */
- /* If this is a weak symbol, and there is a real definition, the
- processor independent code will have arranged for us to see the
- real definition first, and we can just use the same value. */
- if (eh->is_weakalias)
- {
- struct elf_link_hash_entry *def = weakdef (eh);
- BFD_ASSERT (def->root.type == bfd_link_hash_defined);
- eh->root.u.def.section = def->root.u.def.section;
- eh->root.u.def.value = def->root.u.def.value;
- return true;
- }
- /* If this is a reference to a symbol defined by a dynamic object which
- is not a function, we might allocate the symbol in our .dynbss section
- and allocate a COPY dynamic relocation.
- But PA64 code is canonically PIC, so as a rule we can avoid this sort
- of hackery. */
- return true;
- }
- /* This function is called via elf_link_hash_traverse to mark millicode
- symbols with a dynindx of -1 and to remove the string table reference
- from the dynamic symbol table. If the symbol is not a millicode symbol,
- elf64_hppa_mark_exported_functions is called. */
- static bool
- elf64_hppa_mark_milli_and_exported_functions (struct elf_link_hash_entry *eh,
- void *data)
- {
- struct bfd_link_info *info = (struct bfd_link_info *) data;
- if (eh->type == STT_PARISC_MILLI)
- {
- if (eh->dynindx != -1)
- {
- eh->dynindx = -1;
- _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
- eh->dynstr_index);
- }
- return true;
- }
- return elf64_hppa_mark_exported_functions (eh, data);
- }
- /* Set the final sizes of the dynamic sections and allocate memory for
- the contents of our special sections. */
- static bool
- elf64_hppa_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
- {
- struct elf64_hppa_link_hash_table *hppa_info;
- struct elf64_hppa_allocate_data data;
- bfd *dynobj;
- bfd *ibfd;
- asection *sec;
- bool relocs;
- hppa_info = hppa_link_hash_table (info);
- if (hppa_info == NULL)
- return false;
- dynobj = hppa_info->root.dynobj;
- BFD_ASSERT (dynobj != NULL);
- /* Mark each function this program exports so that we will allocate
- space in the .opd section for each function's FPTR. If we are
- creating dynamic sections, change the dynamic index of millicode
- symbols to -1 and remove them from the string table for .dynstr.
- We have to traverse the main linker hash table since we have to
- find functions which may not have been mentioned in any relocs. */
- elf_link_hash_traverse (&hppa_info->root,
- (hppa_info->root.dynamic_sections_created
- ? elf64_hppa_mark_milli_and_exported_functions
- : elf64_hppa_mark_exported_functions),
- info);
- if (hppa_info->root.dynamic_sections_created)
- {
- /* Set the contents of the .interp section to the interpreter. */
- if (bfd_link_executable (info) && !info->nointerp)
- {
- sec = bfd_get_linker_section (dynobj, ".interp");
- BFD_ASSERT (sec != NULL);
- sec->size = sizeof ELF_DYNAMIC_INTERPRETER;
- sec->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
- }
- }
- else
- {
- /* We may have created entries in the .rela.got section.
- However, if we are not creating the dynamic sections, we will
- not actually use these entries. Reset the size of .rela.dlt,
- which will cause it to get stripped from the output file
- below. */
- sec = hppa_info->dlt_rel_sec;
- if (sec != NULL)
- sec->size = 0;
- }
- /* Set up DLT, PLT and OPD offsets for local syms, and space for local
- dynamic relocs. */
- for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
- {
- bfd_signed_vma *local_dlt;
- bfd_signed_vma *end_local_dlt;
- bfd_signed_vma *local_plt;
- bfd_signed_vma *end_local_plt;
- bfd_signed_vma *local_opd;
- bfd_signed_vma *end_local_opd;
- bfd_size_type locsymcount;
- Elf_Internal_Shdr *symtab_hdr;
- asection *srel;
- if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
- continue;
- for (sec = ibfd->sections; sec != NULL; sec = sec->next)
- {
- struct elf64_hppa_dyn_reloc_entry *hdh_p;
- for (hdh_p = ((struct elf64_hppa_dyn_reloc_entry *)
- elf_section_data (sec)->local_dynrel);
- hdh_p != NULL;
- hdh_p = hdh_p->next)
- {
- if (!bfd_is_abs_section (hdh_p->sec)
- && bfd_is_abs_section (hdh_p->sec->output_section))
- {
- /* Input section has been discarded, either because
- it is a copy of a linkonce section or due to
- linker script /DISCARD/, so we'll be discarding
- the relocs too. */
- }
- else if (hdh_p->count != 0)
- {
- srel = elf_section_data (hdh_p->sec)->sreloc;
- srel->size += hdh_p->count * sizeof (Elf64_External_Rela);
- if ((hdh_p->sec->output_section->flags & SEC_READONLY) != 0)
- info->flags |= DF_TEXTREL;
- }
- }
- }
- local_dlt = elf_local_got_refcounts (ibfd);
- if (!local_dlt)
- continue;
- symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
- locsymcount = symtab_hdr->sh_info;
- end_local_dlt = local_dlt + locsymcount;
- sec = hppa_info->dlt_sec;
- srel = hppa_info->dlt_rel_sec;
- for (; local_dlt < end_local_dlt; ++local_dlt)
- {
- if (*local_dlt > 0)
- {
- *local_dlt = sec->size;
- sec->size += DLT_ENTRY_SIZE;
- if (bfd_link_pic (info))
- {
- srel->size += sizeof (Elf64_External_Rela);
- }
- }
- else
- *local_dlt = (bfd_vma) -1;
- }
- local_plt = end_local_dlt;
- end_local_plt = local_plt + locsymcount;
- if (! hppa_info->root.dynamic_sections_created)
- {
- /* Won't be used, but be safe. */
- for (; local_plt < end_local_plt; ++local_plt)
- *local_plt = (bfd_vma) -1;
- }
- else
- {
- sec = hppa_info->root.splt;
- srel = hppa_info->root.srelplt;
- for (; local_plt < end_local_plt; ++local_plt)
- {
- if (*local_plt > 0)
- {
- *local_plt = sec->size;
- sec->size += PLT_ENTRY_SIZE;
- if (bfd_link_pic (info))
- srel->size += sizeof (Elf64_External_Rela);
- }
- else
- *local_plt = (bfd_vma) -1;
- }
- }
- local_opd = end_local_plt;
- end_local_opd = local_opd + locsymcount;
- if (! hppa_info->root.dynamic_sections_created)
- {
- /* Won't be used, but be safe. */
- for (; local_opd < end_local_opd; ++local_opd)
- *local_opd = (bfd_vma) -1;
- }
- else
- {
- sec = hppa_info->opd_sec;
- srel = hppa_info->opd_rel_sec;
- for (; local_opd < end_local_opd; ++local_opd)
- {
- if (*local_opd > 0)
- {
- *local_opd = sec->size;
- sec->size += OPD_ENTRY_SIZE;
- if (bfd_link_pic (info))
- srel->size += sizeof (Elf64_External_Rela);
- }
- else
- *local_opd = (bfd_vma) -1;
- }
- }
- }
- /* Allocate the GOT entries. */
- data.info = info;
- if (hppa_info->dlt_sec)
- {
- data.ofs = hppa_info->dlt_sec->size;
- elf_link_hash_traverse (&hppa_info->root,
- allocate_global_data_dlt, &data);
- hppa_info->dlt_sec->size = data.ofs;
- }
- if (hppa_info->root.splt)
- {
- data.ofs = hppa_info->root.splt->size;
- elf_link_hash_traverse (&hppa_info->root,
- allocate_global_data_plt, &data);
- hppa_info->root.splt->size = data.ofs;
- }
- if (hppa_info->stub_sec)
- {
- data.ofs = 0x0;
- elf_link_hash_traverse (&hppa_info->root,
- allocate_global_data_stub, &data);
- hppa_info->stub_sec->size = data.ofs;
- }
- /* Allocate space for entries in the .opd section. */
- if (hppa_info->opd_sec)
- {
- data.ofs = hppa_info->opd_sec->size;
- elf_link_hash_traverse (&hppa_info->root,
- allocate_global_data_opd, &data);
- hppa_info->opd_sec->size = data.ofs;
- }
- /* Now allocate space for dynamic relocations, if necessary. */
- if (hppa_info->root.dynamic_sections_created)
- elf_link_hash_traverse (&hppa_info->root,
- allocate_dynrel_entries, &data);
- /* The sizes of all the sections are set. Allocate memory for them. */
- relocs = false;
- for (sec = dynobj->sections; sec != NULL; sec = sec->next)
- {
- const char *name;
- if ((sec->flags & SEC_LINKER_CREATED) == 0)
- continue;
- /* It's OK to base decisions on the section name, because none
- of the dynobj section names depend upon the input files. */
- name = bfd_section_name (sec);
- if (strcmp (name, ".plt") == 0)
- {
- /* Remember whether there is a PLT. */
- ;
- }
- else if (strcmp (name, ".opd") == 0
- || startswith (name, ".dlt")
- || strcmp (name, ".stub") == 0
- || strcmp (name, ".got") == 0)
- {
- /* Strip this section if we don't need it; see the comment below. */
- }
- else if (startswith (name, ".rela"))
- {
- if (sec->size != 0)
- {
- /* Remember whether there are any reloc sections other
- than .rela.plt. */
- if (strcmp (name, ".rela.plt") != 0)
- relocs = true;
- /* We use the reloc_count field as a counter if we need
- to copy relocs into the output file. */
- sec->reloc_count = 0;
- }
- }
- else
- {
- /* It's not one of our sections, so don't allocate space. */
- continue;
- }
- if (sec->size == 0)
- {
- /* If we don't need this section, strip it from the
- output file. This is mostly to handle .rela.bss and
- .rela.plt. We must create both sections in
- create_dynamic_sections, because they must be created
- before the linker maps input sections to output
- sections. The linker does that before
- adjust_dynamic_symbol is called, and it is that
- function which decides whether anything needs to go
- into these sections. */
- sec->flags |= SEC_EXCLUDE;
- continue;
- }
- if ((sec->flags & SEC_HAS_CONTENTS) == 0)
- continue;
- /* Allocate memory for the section contents if it has not
- been allocated already. We use bfd_zalloc here in case
- unused entries are not reclaimed before the section's
- contents are written out. This should not happen, but this
- way if it does, we get a R_PARISC_NONE reloc instead of
- garbage. */
- if (sec->contents == NULL)
- {
- sec->contents = (bfd_byte *) bfd_zalloc (dynobj, sec->size);
- if (sec->contents == NULL)
- return false;
- }
- }
- if (hppa_info->root.dynamic_sections_created)
- {
- /* Always create a DT_PLTGOT. It actually has nothing to do with
- the PLT, it is how we communicate the __gp value of a load
- module to the dynamic linker. */
- #define add_dynamic_entry(TAG, VAL) \
- _bfd_elf_add_dynamic_entry (info, TAG, VAL)
- if (!add_dynamic_entry (DT_HP_DLD_FLAGS, 0))
- return false;
- /* Add some entries to the .dynamic section. We fill in the
- values later, in elf64_hppa_finish_dynamic_sections, but we
- must add the entries now so that we get the correct size for
- the .dynamic section. The DT_DEBUG entry is filled in by the
- dynamic linker and used by the debugger. */
- if (! bfd_link_pic (info))
- {
- if (!add_dynamic_entry (DT_HP_DLD_HOOK, 0)
- || !add_dynamic_entry (DT_HP_LOAD_MAP, 0))
- return false;
- }
- /* Force DT_FLAGS to always be set.
- Required by HPUX 11.00 patch PHSS_26559. */
- if (!add_dynamic_entry (DT_FLAGS, (info)->flags))
- return false;
- }
- #undef add_dynamic_entry
- return _bfd_elf_add_dynamic_tags (output_bfd, info, relocs);
- }
- /* Called after we have output the symbol into the dynamic symbol
- table, but before we output the symbol into the normal symbol
- table.
- For some symbols we had to change their address when outputting
- the dynamic symbol table. We undo that change here so that
- the symbols have their expected value in the normal symbol
- table. Ick. */
- static int
- elf64_hppa_link_output_symbol_hook (struct bfd_link_info *info ATTRIBUTE_UNUSED,
- const char *name,
- Elf_Internal_Sym *sym,
- asection *input_sec ATTRIBUTE_UNUSED,
- struct elf_link_hash_entry *eh)
- {
- struct elf64_hppa_link_hash_entry *hh = hppa_elf_hash_entry (eh);
- /* We may be called with the file symbol or section symbols.
- They never need munging, so it is safe to ignore them. */
- if (!name || !eh)
- return 1;
- /* Function symbols for which we created .opd entries *may* have been
- munged by finish_dynamic_symbol and have to be un-munged here.
- Note that finish_dynamic_symbol sometimes turns dynamic symbols
- into non-dynamic ones, so we initialize st_shndx to -1 in
- mark_exported_functions and check to see if it was overwritten
- here instead of just checking eh->dynindx. */
- if (hh->want_opd && hh->st_shndx != -1)
- {
- /* Restore the saved value and section index. */
- sym->st_value = hh->st_value;
- sym->st_shndx = hh->st_shndx;
- }
- return 1;
- }
- /* Finish up dynamic symbol handling. We set the contents of various
- dynamic sections here. */
- static bool
- elf64_hppa_finish_dynamic_symbol (bfd *output_bfd,
- struct bfd_link_info *info,
- struct elf_link_hash_entry *eh,
- Elf_Internal_Sym *sym)
- {
- struct elf64_hppa_link_hash_entry *hh = hppa_elf_hash_entry (eh);
- asection *stub, *splt, *sopd, *spltrel;
- struct elf64_hppa_link_hash_table *hppa_info;
- hppa_info = hppa_link_hash_table (info);
- if (hppa_info == NULL)
- return false;
- stub = hppa_info->stub_sec;
- splt = hppa_info->root.splt;
- sopd = hppa_info->opd_sec;
- spltrel = hppa_info->root.srelplt;
- /* Incredible. It is actually necessary to NOT use the symbol's real
- value when building the dynamic symbol table for a shared library.
- At least for symbols that refer to functions.
- We will store a new value and section index into the symbol long
- enough to output it into the dynamic symbol table, then we restore
- the original values (in elf64_hppa_link_output_symbol_hook). */
- if (hh->want_opd)
- {
- BFD_ASSERT (sopd != NULL);
- /* Save away the original value and section index so that we
- can restore them later. */
- hh->st_value = sym->st_value;
- hh->st_shndx = sym->st_shndx;
- /* For the dynamic symbol table entry, we want the value to be
- address of this symbol's entry within the .opd section. */
- sym->st_value = (hh->opd_offset
- + sopd->output_offset
- + sopd->output_section->vma);
- sym->st_shndx = _bfd_elf_section_from_bfd_section (output_bfd,
- sopd->output_section);
- }
- /* Initialize a .plt entry if requested. */
- if (hh->want_plt
- && elf64_hppa_dynamic_symbol_p (eh, info))
- {
- bfd_vma value;
- Elf_Internal_Rela rel;
- bfd_byte *loc;
- BFD_ASSERT (splt != NULL && spltrel != NULL);
- /* We do not actually care about the value in the PLT entry
- if we are creating a shared library and the symbol is
- still undefined, we create a dynamic relocation to fill
- in the correct value. */
- if (bfd_link_pic (info) && eh->root.type == bfd_link_hash_undefined)
- value = 0;
- else
- value = (eh->root.u.def.value + eh->root.u.def.section->vma);
- /* Fill in the entry in the procedure linkage table.
- The format of a plt entry is
- <funcaddr> <__gp>.
- plt_offset is the offset within the PLT section at which to
- install the PLT entry.
- We are modifying the in-memory PLT contents here, so we do not add
- in the output_offset of the PLT section. */
- bfd_put_64 (splt->owner, value, splt->contents + hh->plt_offset);
- value = _bfd_get_gp_value (info->output_bfd);
- bfd_put_64 (splt->owner, value, splt->contents + hh->plt_offset + 0x8);
- /* Create a dynamic IPLT relocation for this entry.
- We are creating a relocation in the output file's PLT section,
- which is included within the DLT secton. So we do need to include
- the PLT's output_offset in the computation of the relocation's
- address. */
- rel.r_offset = (hh->plt_offset + splt->output_offset
- + splt->output_section->vma);
- rel.r_info = ELF64_R_INFO (hh->eh.dynindx, R_PARISC_IPLT);
- rel.r_addend = 0;
- loc = spltrel->contents;
- loc += spltrel->reloc_count++ * sizeof (Elf64_External_Rela);
- bfd_elf64_swap_reloca_out (info->output_bfd, &rel, loc);
- }
- /* Initialize an external call stub entry if requested. */
- if (hh->want_stub
- && elf64_hppa_dynamic_symbol_p (eh, info))
- {
- bfd_vma value;
- int insn;
- unsigned int max_offset;
- BFD_ASSERT (stub != NULL);
- /* Install the generic stub template.
- We are modifying the contents of the stub section, so we do not
- need to include the stub section's output_offset here. */
- memcpy (stub->contents + hh->stub_offset, plt_stub, sizeof (plt_stub));
- /* Fix up the first ldd instruction.
- We are modifying the contents of the STUB section in memory,
- so we do not need to include its output offset in this computation.
- Note the plt_offset value is the value of the PLT entry relative to
- the start of the PLT section. These instructions will reference
- data relative to the value of __gp, which may not necessarily have
- the same address as the start of the PLT section.
- gp_offset contains the offset of __gp within the PLT section. */
- value = hh->plt_offset - hppa_info->gp_offset;
- insn = bfd_get_32 (stub->owner, stub->contents + hh->stub_offset);
- if (output_bfd->arch_info->mach >= 25)
- {
- /* Wide mode allows 16 bit offsets. */
- max_offset = 32768;
- insn &= ~ 0xfff1;
- insn |= re_assemble_16 ((int) value);
- }
- else
- {
- max_offset = 8192;
- insn &= ~ 0x3ff1;
- insn |= re_assemble_14 ((int) value);
- }
- if ((value & 7) || value + max_offset >= 2*max_offset - 8)
- {
- _bfd_error_handler
- /* xgettext:c-format */
- (_("stub entry for %s cannot load .plt, dp offset = %" PRId64),
- hh->eh.root.root.string, (int64_t) value);
- return false;
- }
- bfd_put_32 (stub->owner, (bfd_vma) insn,
- stub->contents + hh->stub_offset);
- /* Fix up the second ldd instruction. */
- value += 8;
- insn = bfd_get_32 (stub->owner, stub->contents + hh->stub_offset + 8);
- if (output_bfd->arch_info->mach >= 25)
- {
- insn &= ~ 0xfff1;
- insn |= re_assemble_16 ((int) value);
- }
- else
- {
- insn &= ~ 0x3ff1;
- insn |= re_assemble_14 ((int) value);
- }
- bfd_put_32 (stub->owner, (bfd_vma) insn,
- stub->contents + hh->stub_offset + 8);
- }
- return true;
- }
- /* The .opd section contains FPTRs for each function this file
- exports. Initialize the FPTR entries. */
- static bool
- elf64_hppa_finalize_opd (struct elf_link_hash_entry *eh, void *data)
- {
- struct elf64_hppa_link_hash_entry *hh = hppa_elf_hash_entry (eh);
- struct bfd_link_info *info = (struct bfd_link_info *)data;
- struct elf64_hppa_link_hash_table *hppa_info;
- asection *sopd;
- asection *sopdrel;
- hppa_info = hppa_link_hash_table (info);
- if (hppa_info == NULL)
- return false;
- sopd = hppa_info->opd_sec;
- sopdrel = hppa_info->opd_rel_sec;
- if (hh->want_opd)
- {
- bfd_vma value;
- /* The first two words of an .opd entry are zero.
- We are modifying the contents of the OPD section in memory, so we
- do not need to include its output offset in this computation. */
- memset (sopd->contents + hh->opd_offset, 0, 16);
- value = (eh->root.u.def.value
- + eh->root.u.def.section->output_section->vma
- + eh->root.u.def.section->output_offset);
- /* The next word is the address of the function. */
- bfd_put_64 (sopd->owner, value, sopd->contents + hh->opd_offset + 16);
- /* The last word is our local __gp value. */
- value = _bfd_get_gp_value (info->output_bfd);
- bfd_put_64 (sopd->owner, value, sopd->contents + hh->opd_offset + 24);
- }
- /* If we are generating a shared library, we must generate EPLT relocations
- for each entry in the .opd, even for static functions (they may have
- had their address taken). */
- if (bfd_link_pic (info) && hh->want_opd)
- {
- Elf_Internal_Rela rel;
- bfd_byte *loc;
- int dynindx;
- /* We may need to do a relocation against a local symbol, in
- which case we have to look up it's dynamic symbol index off
- the local symbol hash table. */
- if (eh->dynindx != -1)
- dynindx = eh->dynindx;
- else
- dynindx
- = _bfd_elf_link_lookup_local_dynindx (info, hh->owner,
- hh->sym_indx);
- /* The offset of this relocation is the absolute address of the
- .opd entry for this symbol. */
- rel.r_offset = (hh->opd_offset + sopd->output_offset
- + sopd->output_section->vma);
- /* If H is non-null, then we have an external symbol.
- It is imperative that we use a different dynamic symbol for the
- EPLT relocation if the symbol has global scope.
- In the dynamic symbol table, the function symbol will have a value
- which is address of the function's .opd entry.
- Thus, we can not use that dynamic symbol for the EPLT relocation
- (if we did, the data in the .opd would reference itself rather
- than the actual address of the function). Instead we have to use
- a new dynamic symbol which has the same value as the original global
- function symbol.
- We prefix the original symbol with a "." and use the new symbol in
- the EPLT relocation. This new symbol has already been recorded in
- the symbol table, we just have to look it up and use it.
- We do not have such problems with static functions because we do
- not make their addresses in the dynamic symbol table point to
- the .opd entry. Ultimately this should be safe since a static
- function can not be directly referenced outside of its shared
- library.
- We do have to play similar games for FPTR relocations in shared
- libraries, including those for static symbols. See the FPTR
- handling in elf64_hppa_finalize_dynreloc. */
- if (eh)
- {
- char *new_name;
- struct elf_link_hash_entry *nh;
- new_name = concat (".", eh->root.root.string, NULL);
- nh = elf_link_hash_lookup (elf_hash_table (info),
- new_name, true, true, false);
- /* All we really want from the new symbol is its dynamic
- symbol index. */
- if (nh)
- dynindx = nh->dynindx;
- free (new_name);
- }
- rel.r_addend = 0;
- rel.r_info = ELF64_R_INFO (dynindx, R_PARISC_EPLT);
- loc = sopdrel->contents;
- loc += sopdrel->reloc_count++ * sizeof (Elf64_External_Rela);
- bfd_elf64_swap_reloca_out (info->output_bfd, &rel, loc);
- }
- return true;
- }
- /* The .dlt section contains addresses for items referenced through the
- dlt. Note that we can have a DLTIND relocation for a local symbol, thus
- we can not depend on finish_dynamic_symbol to initialize the .dlt. */
- static bool
- elf64_hppa_finalize_dlt (struct elf_link_hash_entry *eh, void *data)
- {
- struct elf64_hppa_link_hash_entry *hh = hppa_elf_hash_entry (eh);
- struct bfd_link_info *info = (struct bfd_link_info *)data;
- struct elf64_hppa_link_hash_table *hppa_info;
- asection *sdlt, *sdltrel;
- hppa_info = hppa_link_hash_table (info);
- if (hppa_info == NULL)
- return false;
- sdlt = hppa_info->dlt_sec;
- sdltrel = hppa_info->dlt_rel_sec;
- /* H/DYN_H may refer to a local variable and we know it's
- address, so there is no need to create a relocation. Just install
- the proper value into the DLT, note this shortcut can not be
- skipped when building a shared library. */
- if (! bfd_link_pic (info) && hh && hh->want_dlt)
- {
- bfd_vma value;
- /* If we had an LTOFF_FPTR style relocation we want the DLT entry
- to point to the FPTR entry in the .opd section.
- We include the OPD's output offset in this computation as
- we are referring to an absolute address in the resulting
- object file. */
- if (hh->want_opd)
- {
- value = (hh->opd_offset
- + hppa_info->opd_sec->output_offset
- + hppa_info->opd_sec->output_section->vma);
- }
- else if ((eh->root.type == bfd_link_hash_defined
- || eh->root.type == bfd_link_hash_defweak)
- && eh->root.u.def.section)
- {
- value = eh->root.u.def.value + eh->root.u.def.section->output_offset;
- if (eh->root.u.def.section->output_section)
- value += eh->root.u.def.section->output_section->vma;
- else
- value += eh->root.u.def.section->vma;
- }
- else
- /* We have an undefined function reference. */
- value = 0;
- /* We do not need to include the output offset of the DLT section
- here because we are modifying the in-memory contents. */
- bfd_put_64 (sdlt->owner, value, sdlt->contents + hh->dlt_offset);
- }
- /* Create a relocation for the DLT entry associated with this symbol.
- When building a shared library the symbol does not have to be dynamic. */
- if (hh->want_dlt
- && (elf64_hppa_dynamic_symbol_p (eh, info) || bfd_link_pic (info)))
- {
- Elf_Internal_Rela rel;
- bfd_byte *loc;
- int dynindx;
- /* We may need to do a relocation against a local symbol, in
- which case we have to look up it's dynamic symbol index off
- the local symbol hash table. */
- if (eh && eh->dynindx != -1)
- dynindx = eh->dynindx;
- else
- dynindx
- = _bfd_elf_link_lookup_local_dynindx (info, hh->owner,
- hh->sym_indx);
- /* Create a dynamic relocation for this entry. Do include the output
- offset of the DLT entry since we need an absolute address in the
- resulting object file. */
- rel.r_offset = (hh->dlt_offset + sdlt->output_offset
- + sdlt->output_section->vma);
- if (eh && eh->type == STT_FUNC)
- rel.r_info = ELF64_R_INFO (dynindx, R_PARISC_FPTR64);
- else
- rel.r_info = ELF64_R_INFO (dynindx, R_PARISC_DIR64);
- rel.r_addend = 0;
- loc = sdltrel->contents;
- loc += sdltrel->reloc_count++ * sizeof (Elf64_External_Rela);
- bfd_elf64_swap_reloca_out (info->output_bfd, &rel, loc);
- }
- return true;
- }
- /* Finalize the dynamic relocations. Specifically the FPTR relocations
- for dynamic functions used to initialize static data. */
- static bool
- elf64_hppa_finalize_dynreloc (struct elf_link_hash_entry *eh,
- void *data)
- {
- struct elf64_hppa_link_hash_entry *hh = hppa_elf_hash_entry (eh);
- struct bfd_link_info *info = (struct bfd_link_info *)data;
- struct elf64_hppa_link_hash_table *hppa_info;
- int dynamic_symbol;
- dynamic_symbol = elf64_hppa_dynamic_symbol_p (eh, info);
- if (!dynamic_symbol && !bfd_link_pic (info))
- return true;
- if (hh->reloc_entries)
- {
- struct elf64_hppa_dyn_reloc_entry *rent;
- int dynindx;
- hppa_info = hppa_link_hash_table (info);
- if (hppa_info == NULL)
- return false;
- /* We may need to do a relocation against a local symbol, in
- which case we have to look up it's dynamic symbol index off
- the local symbol hash table. */
- if (eh->dynindx != -1)
- dynindx = eh->dynindx;
- else
- dynindx
- = _bfd_elf_link_lookup_local_dynindx (info, hh->owner,
- hh->sym_indx);
- for (rent = hh->reloc_entries; rent; rent = rent->next)
- {
- Elf_Internal_Rela rel;
- bfd_byte *loc;
- /* Allocate one iff we are building a shared library, the relocation
- isn't a R_PARISC_FPTR64, or we don't want an opd entry. */
- if (!bfd_link_pic (info)
- && rent->type == R_PARISC_FPTR64 && hh->want_opd)
- continue;
- /* Create a dynamic relocation for this entry.
- We need the output offset for the reloc's section because
- we are creating an absolute address in the resulting object
- file. */
- rel.r_offset = (rent->offset + rent->sec->output_offset
- + rent->sec->output_section->vma);
- /* An FPTR64 relocation implies that we took the address of
- a function and that the function has an entry in the .opd
- section. We want the FPTR64 relocation to reference the
- entry in .opd.
- We could munge the symbol value in the dynamic symbol table
- (in fact we already do for functions with global scope) to point
- to the .opd entry. Then we could use that dynamic symbol in
- this relocation.
- Or we could do something sensible, not munge the symbol's
- address and instead just use a different symbol to reference
- the .opd entry. At least that seems sensible until you
- realize there's no local dynamic symbols we can use for that
- purpose. Thus the hair in the check_relocs routine.
- We use a section symbol recorded by check_relocs as the
- base symbol for the relocation. The addend is the difference
- between the section symbol and the address of the .opd entry. */
- if (bfd_link_pic (info)
- && rent->type == R_PARISC_FPTR64 && hh->want_opd)
- {
- bfd_vma value, value2;
- /* First compute the address of the opd entry for this symbol. */
- value = (hh->opd_offset
- + hppa_info->opd_sec->output_section->vma
- + hppa_info->opd_sec->output_offset);
- /* Compute the value of the start of the section with
- the relocation. */
- value2 = (rent->sec->output_section->vma
- + rent->sec->output_offset);
- /* Compute the difference between the start of the section
- with the relocation and the opd entry. */
- value -= value2;
- /* The result becomes the addend of the relocation. */
- rel.r_addend = value;
- /* The section symbol becomes the symbol for the dynamic
- relocation. */
- dynindx
- = _bfd_elf_link_lookup_local_dynindx (info,
- rent->sec->owner,
- rent->sec_symndx);
- }
- else
- rel.r_addend = rent->addend;
- rel.r_info = ELF64_R_INFO (dynindx, rent->type);
- loc = hppa_info->other_rel_sec->contents;
- loc += (hppa_info->other_rel_sec->reloc_count++
- * sizeof (Elf64_External_Rela));
- bfd_elf64_swap_reloca_out (info->output_bfd, &rel, loc);
- }
- }
- return true;
- }
- /* Used to decide how to sort relocs in an optimal manner for the
- dynamic linker, before writing them out. */
- static enum elf_reloc_type_class
- elf64_hppa_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
- const asection *rel_sec ATTRIBUTE_UNUSED,
- const Elf_Internal_Rela *rela)
- {
- if (ELF64_R_SYM (rela->r_info) == STN_UNDEF)
- return reloc_class_relative;
- switch ((int) ELF64_R_TYPE (rela->r_info))
- {
- case R_PARISC_IPLT:
- return reloc_class_plt;
- case R_PARISC_COPY:
- return reloc_class_copy;
- default:
- return reloc_class_normal;
- }
- }
- /* Finish up the dynamic sections. */
- static bool
- elf64_hppa_finish_dynamic_sections (bfd *output_bfd,
- struct bfd_link_info *info)
- {
- bfd *dynobj;
- asection *sdyn;
- struct elf64_hppa_link_hash_table *hppa_info;
- hppa_info = hppa_link_hash_table (info);
- if (hppa_info == NULL)
- return false;
- /* Finalize the contents of the .opd section. */
- elf_link_hash_traverse (elf_hash_table (info),
- elf64_hppa_finalize_opd,
- info);
- elf_link_hash_traverse (elf_hash_table (info),
- elf64_hppa_finalize_dynreloc,
- info);
- /* Finalize the contents of the .dlt section. */
- dynobj = elf_hash_table (info)->dynobj;
- /* Finalize the contents of the .dlt section. */
- elf_link_hash_traverse (elf_hash_table (info),
- elf64_hppa_finalize_dlt,
- info);
- sdyn = bfd_get_linker_section (dynobj, ".dynamic");
- if (elf_hash_table (info)->dynamic_sections_created)
- {
- Elf64_External_Dyn *dyncon, *dynconend;
- BFD_ASSERT (sdyn != NULL);
- dyncon = (Elf64_External_Dyn *) sdyn->contents;
- dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
- for (; dyncon < dynconend; dyncon++)
- {
- Elf_Internal_Dyn dyn;
- asection *s;
- bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
- switch (dyn.d_tag)
- {
- default:
- break;
- case DT_HP_LOAD_MAP:
- /* Compute the absolute address of 16byte scratchpad area
- for the dynamic linker.
- By convention the linker script will allocate the scratchpad
- area at the start of the .data section. So all we have to
- to is find the start of the .data section. */
- s = bfd_get_section_by_name (output_bfd, ".data");
- if (!s)
- return false;
- dyn.d_un.d_ptr = s->vma;
- bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
- break;
- case DT_PLTGOT:
- /* HP's use PLTGOT to set the GOT register. */
- dyn.d_un.d_ptr = _bfd_get_gp_value (output_bfd);
- bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
- break;
- case DT_JMPREL:
- s = hppa_info->root.srelplt;
- dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
- bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
- break;
- case DT_PLTRELSZ:
- s = hppa_info->root.srelplt;
- dyn.d_un.d_val = s->size;
- bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
- break;
- case DT_RELA:
- s = hppa_info->other_rel_sec;
- if (! s || ! s->size)
- s = hppa_info->dlt_rel_sec;
- if (! s || ! s->size)
- s = hppa_info->opd_rel_sec;
- dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
- bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
- break;
- case DT_RELASZ:
- s = hppa_info->other_rel_sec;
- dyn.d_un.d_val = s->size;
- s = hppa_info->dlt_rel_sec;
- dyn.d_un.d_val += s->size;
- s = hppa_info->opd_rel_sec;
- dyn.d_un.d_val += s->size;
- /* There is some question about whether or not the size of
- the PLT relocs should be included here. HP's tools do
- it, so we'll emulate them. */
- s = hppa_info->root.srelplt;
- dyn.d_un.d_val += s->size;
- bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
- break;
- }
- }
- }
- return true;
- }
- /* Support for core dump NOTE sections. */
- static bool
- elf64_hppa_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
- {
- int offset;
- size_t size;
- switch (note->descsz)
- {
- default:
- return false;
- case 760: /* Linux/hppa */
- /* pr_cursig */
- elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
- /* pr_pid */
- elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
- /* pr_reg */
- offset = 112;
- size = 640;
- break;
- }
- /* Make a ".reg/999" section. */
- return _bfd_elfcore_make_pseudosection (abfd, ".reg",
- size, note->descpos + offset);
- }
- static bool
- elf64_hppa_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
- {
- char * command;
- int n;
- switch (note->descsz)
- {
- default:
- return false;
- case 136: /* Linux/hppa elf_prpsinfo. */
- elf_tdata (abfd)->core->program
- = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
- elf_tdata (abfd)->core->command
- = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
- }
- /* Note that for some reason, a spurious space is tacked
- onto the end of the args in some (at least one anyway)
- implementations, so strip it off if it exists. */
- command = elf_tdata (abfd)->core->command;
- n = strlen (command);
- if (0 < n && command[n - 1] == ' ')
- command[n - 1] = '\0';
- return true;
- }
- /* Return the number of additional phdrs we will need.
- The generic ELF code only creates PT_PHDRs for executables. The HP
- dynamic linker requires PT_PHDRs for dynamic libraries too.
- This routine indicates that the backend needs one additional program
- header for that case.
- Note we do not have access to the link info structure here, so we have
- to guess whether or not we are building a shared library based on the
- existence of a .interp section. */
- static int
- elf64_hppa_additional_program_headers (bfd *abfd,
- struct bfd_link_info *info ATTRIBUTE_UNUSED)
- {
- asection *s;
- /* If we are creating a shared library, then we have to create a
- PT_PHDR segment. HP's dynamic linker chokes without it. */
- s = bfd_get_section_by_name (abfd, ".interp");
- if (! s)
- return 1;
- return 0;
- }
- static bool
- elf64_hppa_allow_non_load_phdr (bfd *abfd ATTRIBUTE_UNUSED,
- const Elf_Internal_Phdr *phdr ATTRIBUTE_UNUSED,
- unsigned int count ATTRIBUTE_UNUSED)
- {
- return true;
- }
- /* Allocate and initialize any program headers required by this
- specific backend.
- The generic ELF code only creates PT_PHDRs for executables. The HP
- dynamic linker requires PT_PHDRs for dynamic libraries too.
- This allocates the PT_PHDR and initializes it in a manner suitable
- for the HP linker.
- Note we do not have access to the link info structure here, so we have
- to guess whether or not we are building a shared library based on the
- existence of a .interp section. */
- static bool
- elf64_hppa_modify_segment_map (bfd *abfd, struct bfd_link_info *info)
- {
- struct elf_segment_map *m;
- m = elf_seg_map (abfd);
- if (info != NULL && !info->user_phdrs && m != NULL && m->p_type != PT_PHDR)
- {
- m = ((struct elf_segment_map *)
- bfd_zalloc (abfd, (bfd_size_type) sizeof *m));
- if (m == NULL)
- return false;
- m->p_type = PT_PHDR;
- m->p_flags = PF_R | PF_X;
- m->p_flags_valid = 1;
- m->p_paddr_valid = 1;
- m->includes_phdrs = 1;
- m->next = elf_seg_map (abfd);
- elf_seg_map (abfd) = m;
- }
- for (m = elf_seg_map (abfd) ; m != NULL; m = m->next)
- if (m->p_type == PT_LOAD)
- {
- unsigned int i;
- for (i = 0; i < m->count; i++)
- {
- /* The code "hint" is not really a hint. It is a requirement
- for certain versions of the HP dynamic linker. Worse yet,
- it must be set even if the shared library does not have
- any code in its "text" segment (thus the check for .hash
- to catch this situation). */
- if (m->sections[i]->flags & SEC_CODE
- || (strcmp (m->sections[i]->name, ".hash") == 0))
- m->p_flags |= (PF_X | PF_HP_CODE);
- }
- }
- return true;
- }
- /* Called when writing out an object file to decide the type of a
- symbol. */
- static int
- elf64_hppa_elf_get_symbol_type (Elf_Internal_Sym *elf_sym,
- int type)
- {
- if (ELF_ST_TYPE (elf_sym->st_info) == STT_PARISC_MILLI)
- return STT_PARISC_MILLI;
- else
- return type;
- }
- /* Support HP specific sections for core files. */
- static bool
- elf64_hppa_section_from_phdr (bfd *abfd, Elf_Internal_Phdr *hdr, int sec_index,
- const char *typename)
- {
- if (hdr->p_type == PT_HP_CORE_KERNEL)
- {
- asection *sect;
- if (!_bfd_elf_make_section_from_phdr (abfd, hdr, sec_index, typename))
- return false;
- sect = bfd_make_section_anyway (abfd, ".kernel");
- if (sect == NULL)
- return false;
- sect->size = hdr->p_filesz;
- sect->filepos = hdr->p_offset;
- sect->flags = SEC_HAS_CONTENTS | SEC_READONLY;
- return true;
- }
- if (hdr->p_type == PT_HP_CORE_PROC)
- {
- int sig;
- if (bfd_seek (abfd, hdr->p_offset, SEEK_SET) != 0)
- return false;
- if (bfd_bread (&sig, 4, abfd) != 4)
- return false;
- elf_tdata (abfd)->core->signal = sig;
- if (!_bfd_elf_make_section_from_phdr (abfd, hdr, sec_index, typename))
- return false;
- /* GDB uses the ".reg" section to read register contents. */
- return _bfd_elfcore_make_pseudosection (abfd, ".reg", hdr->p_filesz,
- hdr->p_offset);
- }
- if (hdr->p_type == PT_HP_CORE_LOADABLE
- || hdr->p_type == PT_HP_CORE_STACK
- || hdr->p_type == PT_HP_CORE_MMF)
- hdr->p_type = PT_LOAD;
- return _bfd_elf_make_section_from_phdr (abfd, hdr, sec_index, typename);
- }
- /* Hook called by the linker routine which adds symbols from an object
- file. HP's libraries define symbols with HP specific section
- indices, which we have to handle. */
- static bool
- elf_hppa_add_symbol_hook (bfd *abfd,
- struct bfd_link_info *info ATTRIBUTE_UNUSED,
- Elf_Internal_Sym *sym,
- const char **namep ATTRIBUTE_UNUSED,
- flagword *flagsp ATTRIBUTE_UNUSED,
- asection **secp,
- bfd_vma *valp)
- {
- unsigned int sec_index = sym->st_shndx;
- switch (sec_index)
- {
- case SHN_PARISC_ANSI_COMMON:
- *secp = bfd_make_section_old_way (abfd, ".PARISC.ansi.common");
- (*secp)->flags |= SEC_IS_COMMON;
- *valp = sym->st_size;
- break;
- case SHN_PARISC_HUGE_COMMON:
- *secp = bfd_make_section_old_way (abfd, ".PARISC.huge.common");
- (*secp)->flags |= SEC_IS_COMMON;
- *valp = sym->st_size;
- break;
- }
- return true;
- }
- static bool
- elf_hppa_unmark_useless_dynamic_symbols (struct elf_link_hash_entry *h,
- void *data)
- {
- struct bfd_link_info *info = data;
- /* If we are not creating a shared library, and this symbol is
- referenced by a shared library but is not defined anywhere, then
- the generic code will warn that it is undefined.
- This behavior is undesirable on HPs since the standard shared
- libraries contain references to undefined symbols.
- So we twiddle the flags associated with such symbols so that they
- will not trigger the warning. ?!? FIXME. This is horribly fragile.
- Ultimately we should have better controls over the generic ELF BFD
- linker code. */
- if (! bfd_link_relocatable (info)
- && info->unresolved_syms_in_shared_libs != RM_IGNORE
- && h->root.type == bfd_link_hash_undefined
- && h->ref_dynamic
- && !h->ref_regular)
- {
- h->ref_dynamic = 0;
- h->pointer_equality_needed = 1;
- }
- return true;
- }
- static bool
- elf_hppa_remark_useless_dynamic_symbols (struct elf_link_hash_entry *h,
- void *data)
- {
- struct bfd_link_info *info = data;
- /* If we are not creating a shared library, and this symbol is
- referenced by a shared library but is not defined anywhere, then
- the generic code will warn that it is undefined.
- This behavior is undesirable on HPs since the standard shared
- libraries contain references to undefined symbols.
- So we twiddle the flags associated with such symbols so that they
- will not trigger the warning. ?!? FIXME. This is horribly fragile.
- Ultimately we should have better controls over the generic ELF BFD
- linker code. */
- if (! bfd_link_relocatable (info)
- && info->unresolved_syms_in_shared_libs != RM_IGNORE
- && h->root.type == bfd_link_hash_undefined
- && !h->ref_dynamic
- && !h->ref_regular
- && h->pointer_equality_needed)
- {
- h->ref_dynamic = 1;
- h->pointer_equality_needed = 0;
- }
- return true;
- }
- static bool
- elf_hppa_is_dynamic_loader_symbol (const char *name)
- {
- return (! strcmp (name, "__CPU_REVISION")
- || ! strcmp (name, "__CPU_KEYBITS_1")
- || ! strcmp (name, "__SYSTEM_ID_D")
- || ! strcmp (name, "__FPU_MODEL")
- || ! strcmp (name, "__FPU_REVISION")
- || ! strcmp (name, "__ARGC")
- || ! strcmp (name, "__ARGV")
- || ! strcmp (name, "__ENVP")
- || ! strcmp (name, "__TLS_SIZE_D")
- || ! strcmp (name, "__LOAD_INFO")
- || ! strcmp (name, "__systab"));
- }
- /* Record the lowest address for the data and text segments. */
- static void
- elf_hppa_record_segment_addrs (bfd *abfd,
- asection *section,
- void *data)
- {
- struct elf64_hppa_link_hash_table *hppa_info = data;
- if ((section->flags & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
- {
- bfd_vma value;
- Elf_Internal_Phdr *p;
- p = _bfd_elf_find_segment_containing_section (abfd, section->output_section);
- BFD_ASSERT (p != NULL);
- value = p->p_vaddr;
- if (section->flags & SEC_READONLY)
- {
- if (value < hppa_info->text_segment_base)
- hppa_info->text_segment_base = value;
- }
- else
- {
- if (value < hppa_info->data_segment_base)
- hppa_info->data_segment_base = value;
- }
- }
- }
- /* Called after we have seen all the input files/sections, but before
- final symbol resolution and section placement has been determined.
- We use this hook to (possibly) provide a value for __gp, then we
- fall back to the generic ELF final link routine. */
- static bool
- elf_hppa_final_link (bfd *abfd, struct bfd_link_info *info)
- {
- struct stat buf;
- struct elf64_hppa_link_hash_table *hppa_info = hppa_link_hash_table (info);
- if (hppa_info == NULL)
- return false;
- if (! bfd_link_relocatable (info))
- {
- struct elf_link_hash_entry *gp;
- bfd_vma gp_val;
- /* The linker script defines a value for __gp iff it was referenced
- by one of the objects being linked. First try to find the symbol
- in the hash table. If that fails, just compute the value __gp
- should have had. */
- gp = elf_link_hash_lookup (elf_hash_table (info), "__gp", false,
- false, false);
- if (gp)
- {
- /* Adjust the value of __gp as we may want to slide it into the
- .plt section so that the stubs can access PLT entries without
- using an addil sequence. */
- gp->root.u.def.value += hppa_info->gp_offset;
- gp_val = (gp->root.u.def.section->output_section->vma
- + gp->root.u.def.section->output_offset
- + gp->root.u.def.value);
- }
- else
- {
- asection *sec;
- /* First look for a .plt section. If found, then __gp is the
- address of the .plt + gp_offset.
- If no .plt is found, then look for .dlt, .opd and .data (in
- that order) and set __gp to the base address of whichever
- section is found first. */
- sec = hppa_info->root.splt;
- if (sec && ! (sec->flags & SEC_EXCLUDE))
- gp_val = (sec->output_offset
- + sec->output_section->vma
- + hppa_info->gp_offset);
- else
- {
- sec = hppa_info->dlt_sec;
- if (!sec || (sec->flags & SEC_EXCLUDE))
- sec = hppa_info->opd_sec;
- if (!sec || (sec->flags & SEC_EXCLUDE))
- sec = bfd_get_section_by_name (abfd, ".data");
- if (!sec || (sec->flags & SEC_EXCLUDE))
- gp_val = 0;
- else
- gp_val = sec->output_offset + sec->output_section->vma;
- }
- }
- /* Install whatever value we found/computed for __gp. */
- _bfd_set_gp_value (abfd, gp_val);
- }
- /* We need to know the base of the text and data segments so that we
- can perform SEGREL relocations. We will record the base addresses
- when we encounter the first SEGREL relocation. */
- hppa_info->text_segment_base = (bfd_vma)-1;
- hppa_info->data_segment_base = (bfd_vma)-1;
- /* HP's shared libraries have references to symbols that are not
- defined anywhere. The generic ELF BFD linker code will complain
- about such symbols.
- So we detect the losing case and arrange for the flags on the symbol
- to indicate that it was never referenced. This keeps the generic
- ELF BFD link code happy and appears to not create any secondary
- problems. Ultimately we need a way to control the behavior of the
- generic ELF BFD link code better. */
- elf_link_hash_traverse (elf_hash_table (info),
- elf_hppa_unmark_useless_dynamic_symbols,
- info);
- /* Invoke the regular ELF backend linker to do all the work. */
- if (!bfd_elf_final_link (abfd, info))
- return false;
- elf_link_hash_traverse (elf_hash_table (info),
- elf_hppa_remark_useless_dynamic_symbols,
- info);
- /* If we're producing a final executable, sort the contents of the
- unwind section. */
- if (bfd_link_relocatable (info))
- return true;
- /* Do not attempt to sort non-regular files. This is here
- especially for configure scripts and kernel builds which run
- tests with "ld [...] -o /dev/null". */
- if (stat (bfd_get_filename (abfd), &buf) != 0
- || !S_ISREG(buf.st_mode))
- return true;
- return elf_hppa_sort_unwind (abfd);
- }
- /* Relocate the given INSN. VALUE should be the actual value we want
- to insert into the instruction, ie by this point we should not be
- concerned with computing an offset relative to the DLT, PC, etc.
- Instead this routine is meant to handle the bit manipulations needed
- to insert the relocation into the given instruction. */
- static int
- elf_hppa_relocate_insn (int insn, int sym_value, unsigned int r_type)
- {
- switch (r_type)
- {
- /* This is any 22 bit branch. In PA2.0 syntax it corresponds to
- the "B" instruction. */
- case R_PARISC_PCREL22F:
- case R_PARISC_PCREL22C:
- return (insn & ~0x3ff1ffd) | re_assemble_22 (sym_value);
- /* This is any 12 bit branch. */
- case R_PARISC_PCREL12F:
- return (insn & ~0x1ffd) | re_assemble_12 (sym_value);
- /* This is any 17 bit branch. In PA2.0 syntax it also corresponds
- to the "B" instruction as well as BE. */
- case R_PARISC_PCREL17F:
- case R_PARISC_DIR17F:
- case R_PARISC_DIR17R:
- case R_PARISC_PCREL17C:
- case R_PARISC_PCREL17R:
- return (insn & ~0x1f1ffd) | re_assemble_17 (sym_value);
- /* ADDIL or LDIL instructions. */
- case R_PARISC_DLTREL21L:
- case R_PARISC_DLTIND21L:
- case R_PARISC_LTOFF_FPTR21L:
- case R_PARISC_PCREL21L:
- case R_PARISC_LTOFF_TP21L:
- case R_PARISC_DPREL21L:
- case R_PARISC_PLTOFF21L:
- case R_PARISC_DIR21L:
- return (insn & ~0x1fffff) | re_assemble_21 (sym_value);
- /* LDO and integer loads/stores with 14 bit displacements. */
- case R_PARISC_DLTREL14R:
- case R_PARISC_DLTREL14F:
- case R_PARISC_DLTIND14R:
- case R_PARISC_DLTIND14F:
- case R_PARISC_LTOFF_FPTR14R:
- case R_PARISC_PCREL14R:
- case R_PARISC_PCREL14F:
- case R_PARISC_LTOFF_TP14R:
- case R_PARISC_LTOFF_TP14F:
- case R_PARISC_DPREL14R:
- case R_PARISC_DPREL14F:
- case R_PARISC_PLTOFF14R:
- case R_PARISC_PLTOFF14F:
- case R_PARISC_DIR14R:
- case R_PARISC_DIR14F:
- return (insn & ~0x3fff) | low_sign_unext (sym_value, 14);
- /* PA2.0W LDO and integer loads/stores with 16 bit displacements. */
- case R_PARISC_LTOFF_FPTR16F:
- case R_PARISC_PCREL16F:
- case R_PARISC_LTOFF_TP16F:
- case R_PARISC_GPREL16F:
- case R_PARISC_PLTOFF16F:
- case R_PARISC_DIR16F:
- case R_PARISC_LTOFF16F:
- return (insn & ~0xffff) | re_assemble_16 (sym_value);
- /* Doubleword loads and stores with a 14 bit displacement. */
- case R_PARISC_DLTREL14DR:
- case R_PARISC_DLTIND14DR:
- case R_PARISC_LTOFF_FPTR14DR:
- case R_PARISC_LTOFF_FPTR16DF:
- case R_PARISC_PCREL14DR:
- case R_PARISC_PCREL16DF:
- case R_PARISC_LTOFF_TP14DR:
- case R_PARISC_LTOFF_TP16DF:
- case R_PARISC_DPREL14DR:
- case R_PARISC_GPREL16DF:
- case R_PARISC_PLTOFF14DR:
- case R_PARISC_PLTOFF16DF:
- case R_PARISC_DIR14DR:
- case R_PARISC_DIR16DF:
- case R_PARISC_LTOFF16DF:
- return (insn & ~0x3ff1) | (((sym_value & 0x2000) >> 13)
- | ((sym_value & 0x1ff8) << 1));
- /* Floating point single word load/store instructions. */
- case R_PARISC_DLTREL14WR:
- case R_PARISC_DLTIND14WR:
- case R_PARISC_LTOFF_FPTR14WR:
- case R_PARISC_LTOFF_FPTR16WF:
- case R_PARISC_PCREL14WR:
- case R_PARISC_PCREL16WF:
- case R_PARISC_LTOFF_TP14WR:
- case R_PARISC_LTOFF_TP16WF:
- case R_PARISC_DPREL14WR:
- case R_PARISC_GPREL16WF:
- case R_PARISC_PLTOFF14WR:
- case R_PARISC_PLTOFF16WF:
- case R_PARISC_DIR16WF:
- case R_PARISC_DIR14WR:
- case R_PARISC_LTOFF16WF:
- return (insn & ~0x3ff9) | (((sym_value & 0x2000) >> 13)
- | ((sym_value & 0x1ffc) << 1));
- default:
- return insn;
- }
- }
- /* Compute the value for a relocation (REL) during a final link stage,
- then insert the value into the proper location in CONTENTS.
- VALUE is a tentative value for the relocation and may be overridden
- and modified here based on the specific relocation to be performed.
- For example we do conversions for PC-relative branches in this routine
- or redirection of calls to external routines to stubs.
- The work of actually applying the relocation is left to a helper
- routine in an attempt to reduce the complexity and size of this
- function. */
- static bfd_reloc_status_type
- elf_hppa_final_link_relocate (Elf_Internal_Rela *rel,
- bfd *input_bfd,
- bfd *output_bfd,
- asection *input_section,
- bfd_byte *contents,
- bfd_vma value,
- struct bfd_link_info *info,
- asection *sym_sec,
- struct elf_link_hash_entry *eh)
- {
- struct elf64_hppa_link_hash_table *hppa_info = hppa_link_hash_table (info);
- struct elf64_hppa_link_hash_entry *hh = hppa_elf_hash_entry (eh);
- bfd_vma *local_offsets;
- Elf_Internal_Shdr *symtab_hdr;
- int insn;
- bfd_vma max_branch_offset = 0;
- bfd_vma offset = rel->r_offset;
- bfd_signed_vma addend = rel->r_addend;
- reloc_howto_type *howto = elf_hppa_howto_table + ELF_R_TYPE (rel->r_info);
- unsigned int r_symndx = ELF_R_SYM (rel->r_info);
- unsigned int r_type = howto->type;
- bfd_byte *hit_data = contents + offset;
- if (hppa_info == NULL)
- return bfd_reloc_notsupported;
- symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
- local_offsets = elf_local_got_offsets (input_bfd);
- insn = bfd_get_32 (input_bfd, hit_data);
- switch (r_type)
- {
- case R_PARISC_NONE:
- break;
- /* Basic function call support.
- Note for a call to a function defined in another dynamic library
- we want to redirect the call to a stub. */
- /* PC relative relocs without an implicit offset. */
- case R_PARISC_PCREL21L:
- case R_PARISC_PCREL14R:
- case R_PARISC_PCREL14F:
- case R_PARISC_PCREL14WR:
- case R_PARISC_PCREL14DR:
- case R_PARISC_PCREL16F:
- case R_PARISC_PCREL16WF:
- case R_PARISC_PCREL16DF:
- {
- /* If this is a call to a function defined in another dynamic
- library, then redirect the call to the local stub for this
- function. */
- if (sym_sec == NULL || sym_sec->output_section == NULL)
- value = (hh->stub_offset + hppa_info->stub_sec->output_offset
- + hppa_info->stub_sec->output_section->vma);
- /* Turn VALUE into a proper PC relative address. */
- value -= (offset + input_section->output_offset
- + input_section->output_section->vma);
- /* Adjust for any field selectors. */
- if (r_type == R_PARISC_PCREL21L)
- value = hppa_field_adjust (value, -8 + addend, e_lsel);
- else if (r_type == R_PARISC_PCREL14F
- || r_type == R_PARISC_PCREL16F
- || r_type == R_PARISC_PCREL16WF
- || r_type == R_PARISC_PCREL16DF)
- value = hppa_field_adjust (value, -8 + addend, e_fsel);
- else
- value = hppa_field_adjust (value, -8 + addend, e_rsel);
- /* Apply the relocation to the given instruction. */
- insn = elf_hppa_relocate_insn (insn, (int) value, r_type);
- break;
- }
- case R_PARISC_PCREL12F:
- case R_PARISC_PCREL22F:
- case R_PARISC_PCREL17F:
- case R_PARISC_PCREL22C:
- case R_PARISC_PCREL17C:
- case R_PARISC_PCREL17R:
- {
- /* If this is a call to a function defined in another dynamic
- library, then redirect the call to the local stub for this
- function. */
- if (sym_sec == NULL || sym_sec->output_section == NULL)
- value = (hh->stub_offset + hppa_info->stub_sec->output_offset
- + hppa_info->stub_sec->output_section->vma);
- /* Turn VALUE into a proper PC relative address. */
- value -= (offset + input_section->output_offset
- + input_section->output_section->vma);
- addend -= 8;
- if (r_type == (unsigned int) R_PARISC_PCREL22F)
- max_branch_offset = (1 << (22-1)) << 2;
- else if (r_type == (unsigned int) R_PARISC_PCREL17F)
- max_branch_offset = (1 << (17-1)) << 2;
- else if (r_type == (unsigned int) R_PARISC_PCREL12F)
- max_branch_offset = (1 << (12-1)) << 2;
- /* Make sure we can reach the branch target. */
- if (max_branch_offset != 0
- && value + addend + max_branch_offset >= 2*max_branch_offset)
- {
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%pB(%pA+%#" PRIx64 "): cannot reach %s"),
- input_bfd,
- input_section,
- (uint64_t) offset,
- eh ? eh->root.root.string : "unknown");
- bfd_set_error (bfd_error_bad_value);
- return bfd_reloc_overflow;
- }
- /* Adjust for any field selectors. */
- if (r_type == R_PARISC_PCREL17R)
- value = hppa_field_adjust (value, addend, e_rsel);
- else
- value = hppa_field_adjust (value, addend, e_fsel);
- /* All branches are implicitly shifted by 2 places. */
- value >>= 2;
- /* Apply the relocation to the given instruction. */
- insn = elf_hppa_relocate_insn (insn, (int) value, r_type);
- break;
- }
- /* Indirect references to data through the DLT. */
- case R_PARISC_DLTIND14R:
- case R_PARISC_DLTIND14F:
- case R_PARISC_DLTIND14DR:
- case R_PARISC_DLTIND14WR:
- case R_PARISC_DLTIND21L:
- case R_PARISC_LTOFF_FPTR14R:
- case R_PARISC_LTOFF_FPTR14DR:
- case R_PARISC_LTOFF_FPTR14WR:
- case R_PARISC_LTOFF_FPTR21L:
- case R_PARISC_LTOFF_FPTR16F:
- case R_PARISC_LTOFF_FPTR16WF:
- case R_PARISC_LTOFF_FPTR16DF:
- case R_PARISC_LTOFF_TP21L:
- case R_PARISC_LTOFF_TP14R:
- case R_PARISC_LTOFF_TP14F:
- case R_PARISC_LTOFF_TP14WR:
- case R_PARISC_LTOFF_TP14DR:
- case R_PARISC_LTOFF_TP16F:
- case R_PARISC_LTOFF_TP16WF:
- case R_PARISC_LTOFF_TP16DF:
- case R_PARISC_LTOFF16F:
- case R_PARISC_LTOFF16WF:
- case R_PARISC_LTOFF16DF:
- {
- bfd_vma off;
- /* If this relocation was against a local symbol, then we still
- have not set up the DLT entry (it's not convenient to do so
- in the "finalize_dlt" routine because it is difficult to get
- to the local symbol's value).
- So, if this is a local symbol (h == NULL), then we need to
- fill in its DLT entry.
- Similarly we may still need to set up an entry in .opd for
- a local function which had its address taken. */
- if (hh == NULL)
- {
- bfd_vma *local_opd_offsets, *local_dlt_offsets;
- if (local_offsets == NULL)
- abort ();
- /* Now do .opd creation if needed. */
- if (r_type == R_PARISC_LTOFF_FPTR14R
- || r_type == R_PARISC_LTOFF_FPTR14DR
- || r_type == R_PARISC_LTOFF_FPTR14WR
- || r_type == R_PARISC_LTOFF_FPTR21L
- || r_type == R_PARISC_LTOFF_FPTR16F
- || r_type == R_PARISC_LTOFF_FPTR16WF
- || r_type == R_PARISC_LTOFF_FPTR16DF)
- {
- local_opd_offsets = local_offsets + 2 * symtab_hdr->sh_info;
- off = local_opd_offsets[r_symndx];
- /* The last bit records whether we've already initialised
- this local .opd entry. */
- if ((off & 1) != 0)
- {
- BFD_ASSERT (off != (bfd_vma) -1);
- off &= ~1;
- }
- else
- {
- local_opd_offsets[r_symndx] |= 1;
- /* The first two words of an .opd entry are zero. */
- memset (hppa_info->opd_sec->contents + off, 0, 16);
- /* The next word is the address of the function. */
- bfd_put_64 (hppa_info->opd_sec->owner, value + addend,
- (hppa_info->opd_sec->contents + off + 16));
- /* The last word is our local __gp value. */
- value = _bfd_get_gp_value (info->output_bfd);
- bfd_put_64 (hppa_info->opd_sec->owner, value,
- (hppa_info->opd_sec->contents + off + 24));
- }
- /* The DLT value is the address of the .opd entry. */
- value = (off
- + hppa_info->opd_sec->output_offset
- + hppa_info->opd_sec->output_section->vma);
- addend = 0;
- }
- local_dlt_offsets = local_offsets;
- off = local_dlt_offsets[r_symndx];
- if ((off & 1) != 0)
- {
- BFD_ASSERT (off != (bfd_vma) -1);
- off &= ~1;
- }
- else
- {
- local_dlt_offsets[r_symndx] |= 1;
- bfd_put_64 (hppa_info->dlt_sec->owner,
- value + addend,
- hppa_info->dlt_sec->contents + off);
- }
- }
- else
- off = hh->dlt_offset;
- /* We want the value of the DLT offset for this symbol, not
- the symbol's actual address. Note that __gp may not point
- to the start of the DLT, so we have to compute the absolute
- address, then subtract out the value of __gp. */
- value = (off
- + hppa_info->dlt_sec->output_offset
- + hppa_info->dlt_sec->output_section->vma);
- value -= _bfd_get_gp_value (output_bfd);
- /* All DLTIND relocations are basically the same at this point,
- except that we need different field selectors for the 21bit
- version vs the 14bit versions. */
- if (r_type == R_PARISC_DLTIND21L
- || r_type == R_PARISC_LTOFF_FPTR21L
- || r_type == R_PARISC_LTOFF_TP21L)
- value = hppa_field_adjust (value, 0, e_lsel);
- else if (r_type == R_PARISC_DLTIND14F
- || r_type == R_PARISC_LTOFF_FPTR16F
- || r_type == R_PARISC_LTOFF_FPTR16WF
- || r_type == R_PARISC_LTOFF_FPTR16DF
- || r_type == R_PARISC_LTOFF16F
- || r_type == R_PARISC_LTOFF16DF
- || r_type == R_PARISC_LTOFF16WF
- || r_type == R_PARISC_LTOFF_TP16F
- || r_type == R_PARISC_LTOFF_TP16WF
- || r_type == R_PARISC_LTOFF_TP16DF)
- value = hppa_field_adjust (value, 0, e_fsel);
- else
- value = hppa_field_adjust (value, 0, e_rsel);
- insn = elf_hppa_relocate_insn (insn, (int) value, r_type);
- break;
- }
- case R_PARISC_DLTREL14R:
- case R_PARISC_DLTREL14F:
- case R_PARISC_DLTREL14DR:
- case R_PARISC_DLTREL14WR:
- case R_PARISC_DLTREL21L:
- case R_PARISC_DPREL21L:
- case R_PARISC_DPREL14WR:
- case R_PARISC_DPREL14DR:
- case R_PARISC_DPREL14R:
- case R_PARISC_DPREL14F:
- case R_PARISC_GPREL16F:
- case R_PARISC_GPREL16WF:
- case R_PARISC_GPREL16DF:
- {
- /* Subtract out the global pointer value to make value a DLT
- relative address. */
- value -= _bfd_get_gp_value (output_bfd);
- /* All DLTREL relocations are basically the same at this point,
- except that we need different field selectors for the 21bit
- version vs the 14bit versions. */
- if (r_type == R_PARISC_DLTREL21L
- || r_type == R_PARISC_DPREL21L)
- value = hppa_field_adjust (value, addend, e_lrsel);
- else if (r_type == R_PARISC_DLTREL14F
- || r_type == R_PARISC_DPREL14F
- || r_type == R_PARISC_GPREL16F
- || r_type == R_PARISC_GPREL16WF
- || r_type == R_PARISC_GPREL16DF)
- value = hppa_field_adjust (value, addend, e_fsel);
- else
- value = hppa_field_adjust (value, addend, e_rrsel);
- insn = elf_hppa_relocate_insn (insn, (int) value, r_type);
- break;
- }
- case R_PARISC_DIR21L:
- case R_PARISC_DIR17R:
- case R_PARISC_DIR17F:
- case R_PARISC_DIR14R:
- case R_PARISC_DIR14F:
- case R_PARISC_DIR14WR:
- case R_PARISC_DIR14DR:
- case R_PARISC_DIR16F:
- case R_PARISC_DIR16WF:
- case R_PARISC_DIR16DF:
- {
- /* All DIR relocations are basically the same at this point,
- except that branch offsets need to be divided by four, and
- we need different field selectors. Note that we don't
- redirect absolute calls to local stubs. */
- if (r_type == R_PARISC_DIR21L)
- value = hppa_field_adjust (value, addend, e_lrsel);
- else if (r_type == R_PARISC_DIR17F
- || r_type == R_PARISC_DIR16F
- || r_type == R_PARISC_DIR16WF
- || r_type == R_PARISC_DIR16DF
- || r_type == R_PARISC_DIR14F)
- value = hppa_field_adjust (value, addend, e_fsel);
- else
- value = hppa_field_adjust (value, addend, e_rrsel);
- if (r_type == R_PARISC_DIR17R || r_type == R_PARISC_DIR17F)
- /* All branches are implicitly shifted by 2 places. */
- value >>= 2;
- insn = elf_hppa_relocate_insn (insn, (int) value, r_type);
- break;
- }
- case R_PARISC_PLTOFF21L:
- case R_PARISC_PLTOFF14R:
- case R_PARISC_PLTOFF14F:
- case R_PARISC_PLTOFF14WR:
- case R_PARISC_PLTOFF14DR:
- case R_PARISC_PLTOFF16F:
- case R_PARISC_PLTOFF16WF:
- case R_PARISC_PLTOFF16DF:
- {
- /* We want the value of the PLT offset for this symbol, not
- the symbol's actual address. Note that __gp may not point
- to the start of the DLT, so we have to compute the absolute
- address, then subtract out the value of __gp. */
- value = (hh->plt_offset
- + hppa_info->root.splt->output_offset
- + hppa_info->root.splt->output_section->vma);
- value -= _bfd_get_gp_value (output_bfd);
- /* All PLTOFF relocations are basically the same at this point,
- except that we need different field selectors for the 21bit
- version vs the 14bit versions. */
- if (r_type == R_PARISC_PLTOFF21L)
- value = hppa_field_adjust (value, addend, e_lrsel);
- else if (r_type == R_PARISC_PLTOFF14F
- || r_type == R_PARISC_PLTOFF16F
- || r_type == R_PARISC_PLTOFF16WF
- || r_type == R_PARISC_PLTOFF16DF)
- value = hppa_field_adjust (value, addend, e_fsel);
- else
- value = hppa_field_adjust (value, addend, e_rrsel);
- insn = elf_hppa_relocate_insn (insn, (int) value, r_type);
- break;
- }
- case R_PARISC_LTOFF_FPTR32:
- {
- /* FIXME: There used to be code here to create the FPTR itself if
- the relocation was against a local symbol. But the code could
- never have worked. If the assert below is ever triggered then
- the code will need to be reinstated and fixed so that it does
- what is needed. */
- BFD_ASSERT (hh != NULL);
- /* We want the value of the DLT offset for this symbol, not
- the symbol's actual address. Note that __gp may not point
- to the start of the DLT, so we have to compute the absolute
- address, then subtract out the value of __gp. */
- value = (hh->dlt_offset
- + hppa_info->dlt_sec->output_offset
- + hppa_info->dlt_sec->output_section->vma);
- value -= _bfd_get_gp_value (output_bfd);
- bfd_put_32 (input_bfd, value, hit_data);
- return bfd_reloc_ok;
- }
- case R_PARISC_LTOFF_FPTR64:
- case R_PARISC_LTOFF_TP64:
- {
- /* We may still need to create the FPTR itself if it was for
- a local symbol. */
- if (eh == NULL && r_type == R_PARISC_LTOFF_FPTR64)
- {
- /* The first two words of an .opd entry are zero. */
- memset (hppa_info->opd_sec->contents + hh->opd_offset, 0, 16);
- /* The next word is the address of the function. */
- bfd_put_64 (hppa_info->opd_sec->owner, value + addend,
- (hppa_info->opd_sec->contents
- + hh->opd_offset + 16));
- /* The last word is our local __gp value. */
- value = _bfd_get_gp_value (info->output_bfd);
- bfd_put_64 (hppa_info->opd_sec->owner, value,
- hppa_info->opd_sec->contents + hh->opd_offset + 24);
- /* The DLT value is the address of the .opd entry. */
- value = (hh->opd_offset
- + hppa_info->opd_sec->output_offset
- + hppa_info->opd_sec->output_section->vma);
- bfd_put_64 (hppa_info->dlt_sec->owner,
- value,
- hppa_info->dlt_sec->contents + hh->dlt_offset);
- }
- /* We want the value of the DLT offset for this symbol, not
- the symbol's actual address. Note that __gp may not point
- to the start of the DLT, so we have to compute the absolute
- address, then subtract out the value of __gp. */
- value = (hh->dlt_offset
- + hppa_info->dlt_sec->output_offset
- + hppa_info->dlt_sec->output_section->vma);
- value -= _bfd_get_gp_value (output_bfd);
- bfd_put_64 (input_bfd, value, hit_data);
- return bfd_reloc_ok;
- }
- case R_PARISC_DIR32:
- bfd_put_32 (input_bfd, value + addend, hit_data);
- return bfd_reloc_ok;
- case R_PARISC_DIR64:
- bfd_put_64 (input_bfd, value + addend, hit_data);
- return bfd_reloc_ok;
- case R_PARISC_GPREL64:
- /* Subtract out the global pointer value to make value a DLT
- relative address. */
- value -= _bfd_get_gp_value (output_bfd);
- bfd_put_64 (input_bfd, value + addend, hit_data);
- return bfd_reloc_ok;
- case R_PARISC_LTOFF64:
- /* We want the value of the DLT offset for this symbol, not
- the symbol's actual address. Note that __gp may not point
- to the start of the DLT, so we have to compute the absolute
- address, then subtract out the value of __gp. */
- value = (hh->dlt_offset
- + hppa_info->dlt_sec->output_offset
- + hppa_info->dlt_sec->output_section->vma);
- value -= _bfd_get_gp_value (output_bfd);
- bfd_put_64 (input_bfd, value + addend, hit_data);
- return bfd_reloc_ok;
- case R_PARISC_PCREL32:
- {
- /* If this is a call to a function defined in another dynamic
- library, then redirect the call to the local stub for this
- function. */
- if (sym_sec == NULL || sym_sec->output_section == NULL)
- value = (hh->stub_offset + hppa_info->stub_sec->output_offset
- + hppa_info->stub_sec->output_section->vma);
- /* Turn VALUE into a proper PC relative address. */
- value -= (offset + input_section->output_offset
- + input_section->output_section->vma);
- value += addend;
- value -= 8;
- bfd_put_32 (input_bfd, value, hit_data);
- return bfd_reloc_ok;
- }
- case R_PARISC_PCREL64:
- {
- /* If this is a call to a function defined in another dynamic
- library, then redirect the call to the local stub for this
- function. */
- if (sym_sec == NULL || sym_sec->output_section == NULL)
- value = (hh->stub_offset + hppa_info->stub_sec->output_offset
- + hppa_info->stub_sec->output_section->vma);
- /* Turn VALUE into a proper PC relative address. */
- value -= (offset + input_section->output_offset
- + input_section->output_section->vma);
- value += addend;
- value -= 8;
- bfd_put_64 (input_bfd, value, hit_data);
- return bfd_reloc_ok;
- }
- case R_PARISC_FPTR64:
- {
- bfd_vma off;
- /* We may still need to create the FPTR itself if it was for
- a local symbol. */
- if (hh == NULL)
- {
- bfd_vma *local_opd_offsets;
- if (local_offsets == NULL)
- abort ();
- local_opd_offsets = local_offsets + 2 * symtab_hdr->sh_info;
- off = local_opd_offsets[r_symndx];
- /* The last bit records whether we've already initialised
- this local .opd entry. */
- if ((off & 1) != 0)
- {
- BFD_ASSERT (off != (bfd_vma) -1);
- off &= ~1;
- }
- else
- {
- /* The first two words of an .opd entry are zero. */
- memset (hppa_info->opd_sec->contents + off, 0, 16);
- /* The next word is the address of the function. */
- bfd_put_64 (hppa_info->opd_sec->owner, value + addend,
- (hppa_info->opd_sec->contents + off + 16));
- /* The last word is our local __gp value. */
- value = _bfd_get_gp_value (info->output_bfd);
- bfd_put_64 (hppa_info->opd_sec->owner, value,
- hppa_info->opd_sec->contents + off + 24);
- }
- }
- else
- off = hh->opd_offset;
- if (hh == NULL || hh->want_opd)
- /* We want the value of the OPD offset for this symbol. */
- value = (off
- + hppa_info->opd_sec->output_offset
- + hppa_info->opd_sec->output_section->vma);
- else
- /* We want the address of the symbol. */
- value += addend;
- bfd_put_64 (input_bfd, value, hit_data);
- return bfd_reloc_ok;
- }
- case R_PARISC_SECREL32:
- if (sym_sec && sym_sec->output_section)
- value -= sym_sec->output_section->vma;
- bfd_put_32 (input_bfd, value + addend, hit_data);
- return bfd_reloc_ok;
- case R_PARISC_SEGREL32:
- case R_PARISC_SEGREL64:
- {
- /* If this is the first SEGREL relocation, then initialize
- the segment base values. */
- if (hppa_info->text_segment_base == (bfd_vma) -1)
- bfd_map_over_sections (output_bfd, elf_hppa_record_segment_addrs,
- hppa_info);
- /* VALUE holds the absolute address. We want to include the
- addend, then turn it into a segment relative address.
- The segment is derived from SYM_SEC. We assume that there are
- only two segments of note in the resulting executable/shlib.
- A readonly segment (.text) and a readwrite segment (.data). */
- value += addend;
- if (sym_sec->flags & SEC_CODE)
- value -= hppa_info->text_segment_base;
- else
- value -= hppa_info->data_segment_base;
- if (r_type == R_PARISC_SEGREL32)
- bfd_put_32 (input_bfd, value, hit_data);
- else
- bfd_put_64 (input_bfd, value, hit_data);
- return bfd_reloc_ok;
- }
- /* Something we don't know how to handle. */
- default:
- return bfd_reloc_notsupported;
- }
- /* Update the instruction word. */
- bfd_put_32 (input_bfd, (bfd_vma) insn, hit_data);
- return bfd_reloc_ok;
- }
- /* Relocate an HPPA ELF section. */
- static int
- elf64_hppa_relocate_section (bfd *output_bfd,
- struct bfd_link_info *info,
- bfd *input_bfd,
- asection *input_section,
- bfd_byte *contents,
- Elf_Internal_Rela *relocs,
- Elf_Internal_Sym *local_syms,
- asection **local_sections)
- {
- Elf_Internal_Shdr *symtab_hdr;
- Elf_Internal_Rela *rel;
- Elf_Internal_Rela *relend;
- struct elf64_hppa_link_hash_table *hppa_info;
- hppa_info = hppa_link_hash_table (info);
- if (hppa_info == NULL)
- return false;
- symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
- rel = relocs;
- relend = relocs + input_section->reloc_count;
- for (; rel < relend; rel++)
- {
- int r_type;
- reloc_howto_type *howto = elf_hppa_howto_table + ELF_R_TYPE (rel->r_info);
- unsigned long r_symndx;
- struct elf_link_hash_entry *eh;
- Elf_Internal_Sym *sym;
- asection *sym_sec;
- bfd_vma relocation;
- bfd_reloc_status_type r;
- r_type = ELF_R_TYPE (rel->r_info);
- if (r_type < 0 || r_type >= (int) R_PARISC_UNIMPLEMENTED)
- {
- bfd_set_error (bfd_error_bad_value);
- return false;
- }
- if (r_type == (unsigned int) R_PARISC_GNU_VTENTRY
- || r_type == (unsigned int) R_PARISC_GNU_VTINHERIT)
- continue;
- /* This is a final link. */
- r_symndx = ELF_R_SYM (rel->r_info);
- eh = NULL;
- sym = NULL;
- sym_sec = NULL;
- if (r_symndx < symtab_hdr->sh_info)
- {
- /* This is a local symbol, hh defaults to NULL. */
- sym = local_syms + r_symndx;
- sym_sec = local_sections[r_symndx];
- relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sym_sec, rel);
- }
- else
- {
- /* This is not a local symbol. */
- struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd);
- /* It seems this can happen with erroneous or unsupported
- input (mixing a.out and elf in an archive, for example.) */
- if (sym_hashes == NULL)
- return false;
- eh = sym_hashes[r_symndx - symtab_hdr->sh_info];
- if (info->wrap_hash != NULL
- && (input_section->flags & SEC_DEBUGGING) != 0)
- eh = ((struct elf_link_hash_entry *)
- unwrap_hash_lookup (info, input_bfd, &eh->root));
- while (eh->root.type == bfd_link_hash_indirect
- || eh->root.type == bfd_link_hash_warning)
- eh = (struct elf_link_hash_entry *) eh->root.u.i.link;
- relocation = 0;
- if (eh->root.type == bfd_link_hash_defined
- || eh->root.type == bfd_link_hash_defweak)
- {
- sym_sec = eh->root.u.def.section;
- if (sym_sec != NULL
- && sym_sec->output_section != NULL)
- relocation = (eh->root.u.def.value
- + sym_sec->output_section->vma
- + sym_sec->output_offset);
- }
- else if (eh->root.type == bfd_link_hash_undefweak)
- ;
- else if (info->unresolved_syms_in_objects == RM_IGNORE
- && ELF_ST_VISIBILITY (eh->other) == STV_DEFAULT)
- ;
- else if (!bfd_link_relocatable (info)
- && elf_hppa_is_dynamic_loader_symbol (eh->root.root.string))
- continue;
- else if (!bfd_link_relocatable (info))
- {
- bool err;
- err = (info->unresolved_syms_in_objects == RM_DIAGNOSE
- && !info->warn_unresolved_syms)
- || ELF_ST_VISIBILITY (eh->other) != STV_DEFAULT;
- info->callbacks->undefined_symbol
- (info, eh->root.root.string, input_bfd,
- input_section, rel->r_offset, err);
- }
- if (!bfd_link_relocatable (info)
- && relocation == 0
- && eh->root.type != bfd_link_hash_defined
- && eh->root.type != bfd_link_hash_defweak
- && eh->root.type != bfd_link_hash_undefweak)
- {
- if (info->unresolved_syms_in_objects == RM_IGNORE
- && ELF_ST_VISIBILITY (eh->other) == STV_DEFAULT
- && eh->type == STT_PARISC_MILLI)
- info->callbacks->undefined_symbol
- (info, eh_name (eh), input_bfd,
- input_section, rel->r_offset, false);
- }
- }
- if (sym_sec != NULL && discarded_section (sym_sec))
- RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
- rel, 1, relend, howto, 0, contents);
- if (bfd_link_relocatable (info))
- continue;
- r = elf_hppa_final_link_relocate (rel, input_bfd, output_bfd,
- input_section, contents,
- relocation, info, sym_sec,
- eh);
- if (r != bfd_reloc_ok)
- {
- switch (r)
- {
- default:
- abort ();
- case bfd_reloc_overflow:
- {
- const char *sym_name;
- if (eh != NULL)
- sym_name = NULL;
- else
- {
- sym_name = bfd_elf_string_from_elf_section (input_bfd,
- symtab_hdr->sh_link,
- sym->st_name);
- if (sym_name == NULL)
- return false;
- if (*sym_name == '\0')
- sym_name = bfd_section_name (sym_sec);
- }
- (*info->callbacks->reloc_overflow)
- (info, (eh ? &eh->root : NULL), sym_name, howto->name,
- (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
- }
- break;
- }
- }
- }
- return true;
- }
- static const struct bfd_elf_special_section elf64_hppa_special_sections[] =
- {
- { STRING_COMMA_LEN (".tbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_HP_TLS },
- { STRING_COMMA_LEN (".fini"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
- { STRING_COMMA_LEN (".init"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
- { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_PARISC_SHORT },
- { STRING_COMMA_LEN (".dlt"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_PARISC_SHORT },
- { STRING_COMMA_LEN (".sdata"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_PARISC_SHORT },
- { STRING_COMMA_LEN (".sbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_PARISC_SHORT },
- { NULL, 0, 0, 0, 0 }
- };
- /* The hash bucket size is the standard one, namely 4. */
- const struct elf_size_info hppa64_elf_size_info =
- {
- sizeof (Elf64_External_Ehdr),
- sizeof (Elf64_External_Phdr),
- sizeof (Elf64_External_Shdr),
- sizeof (Elf64_External_Rel),
- sizeof (Elf64_External_Rela),
- sizeof (Elf64_External_Sym),
- sizeof (Elf64_External_Dyn),
- sizeof (Elf_External_Note),
- 4,
- 1,
- 64, 3,
- ELFCLASS64, EV_CURRENT,
- bfd_elf64_write_out_phdrs,
- bfd_elf64_write_shdrs_and_ehdr,
- bfd_elf64_checksum_contents,
- bfd_elf64_write_relocs,
- bfd_elf64_swap_symbol_in,
- bfd_elf64_swap_symbol_out,
- bfd_elf64_slurp_reloc_table,
- bfd_elf64_slurp_symbol_table,
- bfd_elf64_swap_dyn_in,
- bfd_elf64_swap_dyn_out,
- bfd_elf64_swap_reloc_in,
- bfd_elf64_swap_reloc_out,
- bfd_elf64_swap_reloca_in,
- bfd_elf64_swap_reloca_out
- };
- #define TARGET_BIG_SYM hppa_elf64_vec
- #define TARGET_BIG_NAME "elf64-hppa"
- #define ELF_ARCH bfd_arch_hppa
- #define ELF_TARGET_ID HPPA64_ELF_DATA
- #define ELF_MACHINE_CODE EM_PARISC
- /* This is not strictly correct. The maximum page size for PA2.0 is
- 64M. But everything still uses 4k. */
- #define ELF_MAXPAGESIZE 0x1000
- #define ELF_OSABI ELFOSABI_HPUX
- #define bfd_elf64_bfd_reloc_type_lookup elf_hppa_reloc_type_lookup
- #define bfd_elf64_bfd_reloc_name_lookup elf_hppa_reloc_name_lookup
- #define bfd_elf64_bfd_is_local_label_name elf_hppa_is_local_label_name
- #define elf_info_to_howto elf_hppa_info_to_howto
- #define elf_info_to_howto_rel elf_hppa_info_to_howto_rel
- #define elf_backend_section_from_shdr elf64_hppa_section_from_shdr
- #define elf_backend_object_p elf64_hppa_object_p
- #define elf_backend_final_write_processing \
- elf_hppa_final_write_processing
- #define elf_backend_fake_sections elf_hppa_fake_sections
- #define elf_backend_add_symbol_hook elf_hppa_add_symbol_hook
- #define elf_backend_relocate_section elf_hppa_relocate_section
- #define bfd_elf64_bfd_final_link elf_hppa_final_link
- #define elf_backend_create_dynamic_sections \
- elf64_hppa_create_dynamic_sections
- #define elf_backend_init_file_header elf64_hppa_init_file_header
- #define elf_backend_omit_section_dynsym _bfd_elf_omit_section_dynsym_all
- #define elf_backend_adjust_dynamic_symbol \
- elf64_hppa_adjust_dynamic_symbol
- #define elf_backend_size_dynamic_sections \
- elf64_hppa_size_dynamic_sections
- #define elf_backend_finish_dynamic_symbol \
- elf64_hppa_finish_dynamic_symbol
- #define elf_backend_finish_dynamic_sections \
- elf64_hppa_finish_dynamic_sections
- #define elf_backend_grok_prstatus elf64_hppa_grok_prstatus
- #define elf_backend_grok_psinfo elf64_hppa_grok_psinfo
- /* Stuff for the BFD linker: */
- #define bfd_elf64_bfd_link_hash_table_create \
- elf64_hppa_hash_table_create
- #define elf_backend_check_relocs \
- elf64_hppa_check_relocs
- #define elf_backend_size_info \
- hppa64_elf_size_info
- #define elf_backend_additional_program_headers \
- elf64_hppa_additional_program_headers
- #define elf_backend_modify_segment_map \
- elf64_hppa_modify_segment_map
- #define elf_backend_allow_non_load_phdr \
- elf64_hppa_allow_non_load_phdr
- #define elf_backend_link_output_symbol_hook \
- elf64_hppa_link_output_symbol_hook
- #define elf_backend_want_got_plt 0
- #define elf_backend_plt_readonly 0
- #define elf_backend_want_plt_sym 0
- #define elf_backend_got_header_size 0
- #define elf_backend_type_change_ok true
- #define elf_backend_get_symbol_type elf64_hppa_elf_get_symbol_type
- #define elf_backend_reloc_type_class elf64_hppa_reloc_type_class
- #define elf_backend_rela_normal 1
- #define elf_backend_special_sections elf64_hppa_special_sections
- #define elf_backend_action_discarded elf_hppa_action_discarded
- #define elf_backend_section_from_phdr elf64_hppa_section_from_phdr
- #define elf64_bed elf64_hppa_hpux_bed
- #include "elf64-target.h"
- #undef TARGET_BIG_SYM
- #define TARGET_BIG_SYM hppa_elf64_linux_vec
- #undef TARGET_BIG_NAME
- #define TARGET_BIG_NAME "elf64-hppa-linux"
- #undef ELF_OSABI
- #define ELF_OSABI ELFOSABI_GNU
- #undef elf64_bed
- #define elf64_bed elf64_hppa_linux_bed
- #undef elf_backend_special_sections
- #define elf_backend_special_sections (elf64_hppa_special_sections + 1)
- #include "elf64-target.h"
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