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- /* Lattice Mico32-specific support for 32-bit ELF
- Copyright (C) 2008-2022 Free Software Foundation, Inc.
- Contributed by Jon Beniston <jon@beniston.com>
- 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/lm32.h"
- #define DEFAULT_STACK_SIZE 0x20000
- #define PLT_ENTRY_SIZE 20
- #define PLT0_ENTRY_WORD0 0
- #define PLT0_ENTRY_WORD1 0
- #define PLT0_ENTRY_WORD2 0
- #define PLT0_ENTRY_WORD3 0
- #define PLT0_ENTRY_WORD4 0
- #define PLT0_PIC_ENTRY_WORD0 0
- #define PLT0_PIC_ENTRY_WORD1 0
- #define PLT0_PIC_ENTRY_WORD2 0
- #define PLT0_PIC_ENTRY_WORD3 0
- #define PLT0_PIC_ENTRY_WORD4 0
- #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
- extern const bfd_target lm32_elf32_fdpic_vec;
- #define IS_FDPIC(bfd) ((bfd)->xvec == &lm32_elf32_fdpic_vec)
- static bfd_reloc_status_type lm32_elf_gprel_reloc
- (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
- /* lm32 ELF linker hash table. */
- struct elf_lm32_link_hash_table
- {
- struct elf_link_hash_table root;
- /* Short-cuts to get to dynamic linker sections. */
- asection *sfixup32;
- asection *sdynbss;
- asection *srelbss;
- int relocs32;
- };
- /* Get the lm32 ELF linker hash table from a link_info structure. */
- #define lm32_elf_hash_table(p) \
- ((is_elf_hash_table ((p)->hash) \
- && elf_hash_table_id (elf_hash_table (p)) == LM32_ELF_DATA) \
- ? (struct elf_lm32_link_hash_table *) (p)->hash : NULL)
- #define lm32fdpic_got_section(info) \
- (lm32_elf_hash_table (info)->root.sgot)
- #define lm32fdpic_gotrel_section(info) \
- (lm32_elf_hash_table (info)->root.srelgot)
- #define lm32fdpic_fixup32_section(info) \
- (lm32_elf_hash_table (info)->sfixup32)
- struct weak_symbol_list
- {
- const char *name;
- struct weak_symbol_list *next;
- };
- /* Create an lm32 ELF linker hash table. */
- static struct bfd_link_hash_table *
- lm32_elf_link_hash_table_create (bfd *abfd)
- {
- struct elf_lm32_link_hash_table *ret;
- size_t amt = sizeof (struct elf_lm32_link_hash_table);
- ret = bfd_zmalloc (amt);
- if (ret == NULL)
- return NULL;
- if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
- _bfd_elf_link_hash_newfunc,
- sizeof (struct elf_link_hash_entry),
- LM32_ELF_DATA))
- {
- free (ret);
- return NULL;
- }
- return &ret->root.root;
- }
- /* Add a fixup to the ROFIXUP section. */
- static bfd_vma
- _lm32fdpic_add_rofixup (bfd *output_bfd, asection *rofixup, bfd_vma relocation)
- {
- bfd_vma fixup_offset;
- if (rofixup->flags & SEC_EXCLUDE)
- return -1;
- fixup_offset = rofixup->reloc_count * 4;
- if (rofixup->contents)
- {
- BFD_ASSERT (fixup_offset < rofixup->size);
- if (fixup_offset < rofixup->size)
- bfd_put_32 (output_bfd, relocation, rofixup->contents + fixup_offset);
- }
- rofixup->reloc_count++;
- return fixup_offset;
- }
- /* Create .rofixup sections in DYNOBJ, and set up
- shortcuts to them in our hash table. */
- static bool
- create_rofixup_section (bfd *dynobj, struct bfd_link_info *info)
- {
- struct elf_lm32_link_hash_table *htab;
- htab = lm32_elf_hash_table (info);
- if (htab == NULL)
- return false;
- /* Fixup section for R_LM32_32 relocs. */
- lm32fdpic_fixup32_section (info)
- = bfd_make_section_anyway_with_flags (dynobj,
- ".rofixup",
- (SEC_ALLOC
- | SEC_LOAD
- | SEC_HAS_CONTENTS
- | SEC_IN_MEMORY
- | SEC_LINKER_CREATED
- | SEC_READONLY));
- if (lm32fdpic_fixup32_section (info) == NULL
- || !bfd_set_section_alignment (lm32fdpic_fixup32_section (info), 2))
- return false;
- return true;
- }
- static reloc_howto_type lm32_elf_howto_table [] =
- {
- /* This reloc does nothing. */
- HOWTO (R_LM32_NONE, /* type */
- 0, /* rightshift */
- 3, /* size (0 = byte, 1 = short, 2 = long) */
- 0, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_LM32_NONE", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0, /* dst_mask */
- false), /* pcrel_offset */
- /* An 8 bit absolute relocation. */
- HOWTO (R_LM32_8, /* type */
- 0, /* rightshift */
- 0, /* size (0 = byte, 1 = short, 2 = long) */
- 8, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_bitfield,/* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_LM32_8", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0xff, /* dst_mask */
- false), /* pcrel_offset */
- /* A 16 bit absolute relocation. */
- HOWTO (R_LM32_16, /* type */
- 0, /* rightshift */
- 1, /* size (0 = byte, 1 = short, 2 = long) */
- 16, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_bitfield,/* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_LM32_16", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0xffff, /* dst_mask */
- false), /* pcrel_offset */
- /* A 32 bit absolute relocation. */
- HOWTO (R_LM32_32, /* type */
- 0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 32, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_bitfield,/* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_LM32_32", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0xffffffff, /* dst_mask */
- false), /* pcrel_offset */
- HOWTO (R_LM32_HI16, /* type */
- 16, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 16, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_bitfield,/* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_LM32_HI16", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0xffff, /* dst_mask */
- false), /* pcrel_offset */
- HOWTO (R_LM32_LO16, /* type */
- 0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 16, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_LM32_LO16", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0xffff, /* dst_mask */
- false), /* pcrel_offset */
- HOWTO (R_LM32_GPREL16, /* type */
- 0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 16, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont, /* complain_on_overflow */
- lm32_elf_gprel_reloc, /* special_function */
- "R_LM32_GPREL16", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0xffff, /* dst_mask */
- false), /* pcrel_offset */
- HOWTO (R_LM32_CALL, /* type */
- 2, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 26, /* bitsize */
- true, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_signed, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_LM32_CALL", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0x3ffffff, /* dst_mask */
- true), /* pcrel_offset */
- HOWTO (R_LM32_BRANCH, /* type */
- 2, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 16, /* bitsize */
- true, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_signed, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_LM32_BRANCH", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0xffff, /* dst_mask */
- true), /* pcrel_offset */
- /* GNU extension to record C++ vtable hierarchy. */
- HOWTO (R_LM32_GNU_VTINHERIT, /* type */
- 0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 0, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont, /* complain_on_overflow */
- NULL, /* special_function */
- "R_LM32_GNU_VTINHERIT", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0, /* dst_mask */
- false), /* pcrel_offset */
- /* GNU extension to record C++ vtable member usage. */
- HOWTO (R_LM32_GNU_VTENTRY, /* type */
- 0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 0, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont, /* complain_on_overflow */
- _bfd_elf_rel_vtable_reloc_fn,/* special_function */
- "R_LM32_GNU_VTENTRY", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0, /* dst_mask */
- false), /* pcrel_offset */
- HOWTO (R_LM32_16_GOT, /* type */
- 0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 16, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_signed, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_LM32_16_GOT", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0xffff, /* dst_mask */
- false), /* pcrel_offset */
- HOWTO (R_LM32_GOTOFF_HI16, /* type */
- 16, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 16, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_LM32_GOTOFF_HI16", /* name */
- false, /* partial_inplace */
- 0xffff, /* src_mask */
- 0xffff, /* dst_mask */
- false), /* pcrel_offset */
- HOWTO (R_LM32_GOTOFF_LO16, /* type */
- 0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 16, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_LM32_GOTOFF_LO16", /* name */
- false, /* partial_inplace */
- 0xffff, /* src_mask */
- 0xffff, /* dst_mask */
- false), /* pcrel_offset */
- HOWTO (R_LM32_COPY, /* type */
- 0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 32, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_bitfield, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_LM32_COPY", /* name */
- false, /* partial_inplace */
- 0xffffffff, /* src_mask */
- 0xffffffff, /* dst_mask */
- false), /* pcrel_offset */
- HOWTO (R_LM32_GLOB_DAT, /* type */
- 0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 32, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_bitfield, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_LM32_GLOB_DAT", /* name */
- false, /* partial_inplace */
- 0xffffffff, /* src_mask */
- 0xffffffff, /* dst_mask */
- false), /* pcrel_offset */
- HOWTO (R_LM32_JMP_SLOT, /* type */
- 0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 32, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_bitfield, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_LM32_JMP_SLOT", /* name */
- false, /* partial_inplace */
- 0xffffffff, /* src_mask */
- 0xffffffff, /* dst_mask */
- false), /* pcrel_offset */
- HOWTO (R_LM32_RELATIVE, /* type */
- 0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 32, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_bitfield, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_LM32_RELATIVE", /* name */
- false, /* partial_inplace */
- 0xffffffff, /* src_mask */
- 0xffffffff, /* dst_mask */
- false), /* pcrel_offset */
- };
- /* Map BFD reloc types to lm32 ELF reloc types. */
- struct lm32_reloc_map
- {
- bfd_reloc_code_real_type bfd_reloc_val;
- unsigned char elf_reloc_val;
- };
- static const struct lm32_reloc_map lm32_reloc_map[] =
- {
- { BFD_RELOC_NONE, R_LM32_NONE },
- { BFD_RELOC_8, R_LM32_8 },
- { BFD_RELOC_16, R_LM32_16 },
- { BFD_RELOC_32, R_LM32_32 },
- { BFD_RELOC_HI16, R_LM32_HI16 },
- { BFD_RELOC_LO16, R_LM32_LO16 },
- { BFD_RELOC_GPREL16, R_LM32_GPREL16 },
- { BFD_RELOC_LM32_CALL, R_LM32_CALL },
- { BFD_RELOC_LM32_BRANCH, R_LM32_BRANCH },
- { BFD_RELOC_VTABLE_INHERIT, R_LM32_GNU_VTINHERIT },
- { BFD_RELOC_VTABLE_ENTRY, R_LM32_GNU_VTENTRY },
- { BFD_RELOC_LM32_16_GOT, R_LM32_16_GOT },
- { BFD_RELOC_LM32_GOTOFF_HI16, R_LM32_GOTOFF_HI16 },
- { BFD_RELOC_LM32_GOTOFF_LO16, R_LM32_GOTOFF_LO16 },
- { BFD_RELOC_LM32_COPY, R_LM32_COPY },
- { BFD_RELOC_LM32_GLOB_DAT, R_LM32_GLOB_DAT },
- { BFD_RELOC_LM32_JMP_SLOT, R_LM32_JMP_SLOT },
- { BFD_RELOC_LM32_RELATIVE, R_LM32_RELATIVE },
- };
- static reloc_howto_type *
- lm32_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
- bfd_reloc_code_real_type code)
- {
- unsigned int i;
- for (i = 0; i < sizeof (lm32_reloc_map) / sizeof (lm32_reloc_map[0]); i++)
- if (lm32_reloc_map[i].bfd_reloc_val == code)
- return &lm32_elf_howto_table[lm32_reloc_map[i].elf_reloc_val];
- return NULL;
- }
- static reloc_howto_type *
- lm32_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
- const char *r_name)
- {
- unsigned int i;
- for (i = 0;
- i < sizeof (lm32_elf_howto_table) / sizeof (lm32_elf_howto_table[0]);
- i++)
- if (lm32_elf_howto_table[i].name != NULL
- && strcasecmp (lm32_elf_howto_table[i].name, r_name) == 0)
- return &lm32_elf_howto_table[i];
- return NULL;
- }
- /* Set the howto pointer for an Lattice Mico32 ELF reloc. */
- static bool
- lm32_info_to_howto_rela (bfd *abfd,
- arelent *cache_ptr,
- Elf_Internal_Rela *dst)
- {
- unsigned int r_type;
- r_type = ELF32_R_TYPE (dst->r_info);
- if (r_type >= (unsigned int) R_LM32_max)
- {
- /* xgettext:c-format */
- _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
- abfd, r_type);
- bfd_set_error (bfd_error_bad_value);
- return false;
- }
- cache_ptr->howto = &lm32_elf_howto_table[r_type];
- return true;
- }
- /* Set the right machine number for an Lattice Mico32 ELF file. */
- static bool
- lm32_elf_object_p (bfd *abfd)
- {
- return bfd_default_set_arch_mach (abfd, bfd_arch_lm32, bfd_mach_lm32);
- }
- /* Set machine type flags just before file is written out. */
- static bool
- lm32_elf_final_write_processing (bfd *abfd)
- {
- elf_elfheader (abfd)->e_machine = EM_LATTICEMICO32;
- elf_elfheader (abfd)->e_flags &=~ EF_LM32_MACH;
- switch (bfd_get_mach (abfd))
- {
- case bfd_mach_lm32:
- elf_elfheader (abfd)->e_flags |= E_LM32_MACH;
- break;
- default:
- abort ();
- }
- return _bfd_elf_final_write_processing (abfd);
- }
- /* Set the GP value for OUTPUT_BFD. Returns FALSE if this is a
- dangerous relocation. */
- static bool
- lm32_elf_assign_gp (bfd *output_bfd, bfd_vma *pgp)
- {
- unsigned int count;
- asymbol **sym;
- unsigned int i;
- /* If we've already figured out what GP will be, just return it. */
- *pgp = _bfd_get_gp_value (output_bfd);
- if (*pgp)
- return true;
- count = bfd_get_symcount (output_bfd);
- sym = bfd_get_outsymbols (output_bfd);
- /* The linker script will have created a symbol named `_gp' with the
- appropriate value. */
- if (sym == NULL)
- i = count;
- else
- {
- for (i = 0; i < count; i++, sym++)
- {
- const char *name;
- name = bfd_asymbol_name (*sym);
- if (*name == '_' && strcmp (name, "_gp") == 0)
- {
- *pgp = bfd_asymbol_value (*sym);
- _bfd_set_gp_value (output_bfd, *pgp);
- break;
- }
- }
- }
- if (i >= count)
- {
- /* Only get the error once. */
- *pgp = 4;
- _bfd_set_gp_value (output_bfd, *pgp);
- return false;
- }
- return true;
- }
- /* We have to figure out the gp value, so that we can adjust the
- symbol value correctly. We look up the symbol _gp in the output
- BFD. If we can't find it, we're stuck. We cache it in the ELF
- target data. We don't need to adjust the symbol value for an
- external symbol if we are producing relocatable output. */
- static bfd_reloc_status_type
- lm32_elf_final_gp (bfd *output_bfd, asymbol *symbol, bool relocatable,
- char **error_message, bfd_vma *pgp)
- {
- if (bfd_is_und_section (symbol->section) && !relocatable)
- {
- *pgp = 0;
- return bfd_reloc_undefined;
- }
- *pgp = _bfd_get_gp_value (output_bfd);
- if (*pgp == 0 && (!relocatable || (symbol->flags & BSF_SECTION_SYM) != 0))
- {
- if (relocatable)
- {
- /* Make up a value. */
- *pgp = symbol->section->output_section->vma + 0x4000;
- _bfd_set_gp_value (output_bfd, *pgp);
- }
- else if (!lm32_elf_assign_gp (output_bfd, pgp))
- {
- *error_message =
- (char *)
- _("global pointer relative relocation when _gp not defined");
- return bfd_reloc_dangerous;
- }
- }
- return bfd_reloc_ok;
- }
- static bfd_reloc_status_type
- lm32_elf_do_gprel_relocate (bfd *abfd,
- reloc_howto_type *howto,
- asection *input_section ATTRIBUTE_UNUSED,
- bfd_byte *data,
- bfd_vma offset,
- bfd_vma symbol_value,
- bfd_vma addend)
- {
- return _bfd_final_link_relocate (howto, abfd, input_section,
- data, offset, symbol_value, addend);
- }
- static bfd_reloc_status_type
- lm32_elf_gprel_reloc (bfd *abfd,
- arelent *reloc_entry,
- asymbol *symbol,
- void *data,
- asection *input_section,
- bfd *output_bfd,
- char **msg)
- {
- bfd_vma relocation;
- bfd_vma gp;
- bfd_reloc_status_type r;
- if (output_bfd != (bfd *) NULL
- && (symbol->flags & BSF_SECTION_SYM) == 0
- && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
- {
- reloc_entry->address += input_section->output_offset;
- return bfd_reloc_ok;
- }
- if (output_bfd != NULL)
- return bfd_reloc_ok;
- relocation = symbol->value
- + symbol->section->output_section->vma + symbol->section->output_offset;
- if ((r =
- lm32_elf_final_gp (abfd, symbol, false, msg, &gp)) == bfd_reloc_ok)
- {
- relocation = relocation + reloc_entry->addend - gp;
- reloc_entry->addend = 0;
- if ((signed) relocation < -32768 || (signed) relocation > 32767)
- {
- *msg = _("global pointer relative address out of range");
- r = bfd_reloc_outofrange;
- }
- else
- {
- r = lm32_elf_do_gprel_relocate (abfd, reloc_entry->howto,
- input_section,
- data, reloc_entry->address,
- relocation, reloc_entry->addend);
- }
- }
- return r;
- }
- /* Find the segment number in which OSEC, and output section, is
- located. */
- static unsigned
- _lm32fdpic_osec_to_segment (bfd *output_bfd, asection *osec)
- {
- struct elf_segment_map *m;
- Elf_Internal_Phdr *p;
- /* Find the segment that contains the output_section. */
- for (m = elf_seg_map (output_bfd), p = elf_tdata (output_bfd)->phdr;
- m != NULL;
- m = m->next, p++)
- {
- int i;
- for (i = m->count - 1; i >= 0; i--)
- if (m->sections[i] == osec)
- break;
- if (i >= 0)
- break;
- }
- return p - elf_tdata (output_bfd)->phdr;
- }
- /* Determine if an output section is read-only. */
- inline static bool
- _lm32fdpic_osec_readonly_p (bfd *output_bfd, asection *osec)
- {
- unsigned seg = _lm32fdpic_osec_to_segment (output_bfd, osec);
- return ! (elf_tdata (output_bfd)->phdr[seg].p_flags & PF_W);
- }
- /* Relocate a section */
- static int
- lm32_elf_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_tdata (input_bfd)->symtab_hdr;
- struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd);
- Elf_Internal_Rela *rel, *relend;
- struct elf_lm32_link_hash_table *htab = lm32_elf_hash_table (info);
- bfd_vma *local_got_offsets;
- asection *sgot;
- if (htab == NULL)
- return false;
- local_got_offsets = elf_local_got_offsets (input_bfd);
- sgot = htab->root.sgot;
- symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
- sym_hashes = elf_sym_hashes (input_bfd);
- rel = relocs;
- relend = relocs + input_section->reloc_count;
- for (; rel < relend; rel++)
- {
- reloc_howto_type *howto;
- unsigned int r_type;
- unsigned long r_symndx;
- Elf_Internal_Sym *sym;
- asection *sec;
- struct elf_link_hash_entry *h;
- bfd_vma relocation;
- bfd_vma gp;
- bfd_reloc_status_type r;
- const char *name = NULL;
- r_symndx = ELF32_R_SYM (rel->r_info);
- r_type = ELF32_R_TYPE (rel->r_info);
- if (r_type == R_LM32_GNU_VTENTRY
- || r_type == R_LM32_GNU_VTINHERIT )
- continue;
- h = NULL;
- sym = NULL;
- sec = NULL;
- howto = lm32_elf_howto_table + r_type;
- if (r_symndx < symtab_hdr->sh_info)
- {
- /* It's a local symbol. */
- sym = local_syms + r_symndx;
- sec = local_sections[r_symndx];
- relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
- name = bfd_elf_string_from_elf_section
- (input_bfd, symtab_hdr->sh_link, sym->st_name);
- name = name == NULL ? bfd_section_name (sec) : name;
- }
- else
- {
- /* It's a global symbol. */
- bool unresolved_reloc;
- bool warned, ignored;
- RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
- r_symndx, symtab_hdr, sym_hashes,
- h, sec, relocation,
- unresolved_reloc, warned, ignored);
- name = h->root.root.string;
- }
- if (sec != NULL && discarded_section (sec))
- RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
- rel, 1, relend, howto, 0, contents);
- if (bfd_link_relocatable (info))
- {
- /* This is a relocatable link. We don't have to change
- anything, unless the reloc is against a section symbol,
- in which case we have to adjust according to where the
- section symbol winds up in the output section. */
- if (sym == NULL || ELF_ST_TYPE (sym->st_info) != STT_SECTION)
- continue;
- /* If partial_inplace, we need to store any additional addend
- back in the section. */
- if (! howto->partial_inplace)
- continue;
- /* Shouldn't reach here. */
- abort ();
- r = bfd_reloc_ok;
- }
- else
- {
- switch (howto->type)
- {
- case R_LM32_GPREL16:
- if (!lm32_elf_assign_gp (output_bfd, &gp))
- r = bfd_reloc_dangerous;
- else
- {
- relocation = relocation + rel->r_addend - gp;
- rel->r_addend = 0;
- if ((signed)relocation < -32768 || (signed)relocation > 32767)
- r = bfd_reloc_outofrange;
- else
- {
- r = _bfd_final_link_relocate (howto, input_bfd,
- input_section, contents,
- rel->r_offset, relocation,
- rel->r_addend);
- }
- }
- break;
- case R_LM32_16_GOT:
- /* Relocation is to the entry for this symbol in the global
- offset table. */
- BFD_ASSERT (sgot != NULL);
- if (h != NULL)
- {
- bool dyn;
- bfd_vma off;
- off = h->got.offset;
- BFD_ASSERT (off != (bfd_vma) -1);
- dyn = htab->root.dynamic_sections_created;
- if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
- bfd_link_pic (info),
- h)
- || (bfd_link_pic (info)
- && (info->symbolic
- || h->dynindx == -1
- || h->forced_local)
- && h->def_regular))
- {
- /* This is actually a static link, or it is a
- -Bsymbolic link and the symbol is defined
- locally, or the symbol was forced to be local
- because of a version file. We must initialize
- this entry in the global offset table. Since the
- offset must always be a multiple of 4, we use the
- least significant bit to record whether we have
- initialized it already.
- When doing a dynamic link, we create a .rela.got
- relocation entry to initialize the value. This
- is done in the finish_dynamic_symbol routine. */
- if ((off & 1) != 0)
- off &= ~1;
- else
- {
- /* Write entry in GOT */
- bfd_put_32 (output_bfd, relocation,
- sgot->contents + off);
- /* Create entry in .rofixup pointing to GOT entry. */
- if (IS_FDPIC (output_bfd) && h->root.type != bfd_link_hash_undefweak)
- {
- _lm32fdpic_add_rofixup (output_bfd,
- lm32fdpic_fixup32_section
- (info),
- sgot->output_section->vma
- + sgot->output_offset
- + off);
- }
- /* Mark GOT entry as having been written. */
- h->got.offset |= 1;
- }
- }
- relocation = sgot->output_offset + off;
- }
- else
- {
- bfd_vma off;
- bfd_byte *loc;
- BFD_ASSERT (local_got_offsets != NULL
- && local_got_offsets[r_symndx] != (bfd_vma) -1);
- /* Get offset into GOT table. */
- off = local_got_offsets[r_symndx];
- /* The offset must always be a multiple of 4. We use
- the least significant bit to record whether we have
- already processed this entry. */
- if ((off & 1) != 0)
- off &= ~1;
- else
- {
- /* Write entry in GOT. */
- bfd_put_32 (output_bfd, relocation, sgot->contents + off);
- /* Create entry in .rofixup pointing to GOT entry. */
- if (IS_FDPIC (output_bfd))
- {
- _lm32fdpic_add_rofixup (output_bfd,
- lm32fdpic_fixup32_section
- (info),
- sgot->output_section->vma
- + sgot->output_offset
- + off);
- }
- if (bfd_link_pic (info))
- {
- asection *srelgot;
- Elf_Internal_Rela outrel;
- /* We need to generate a R_LM32_RELATIVE reloc
- for the dynamic linker. */
- srelgot = htab->root.srelgot;
- BFD_ASSERT (srelgot != NULL);
- outrel.r_offset = (sgot->output_section->vma
- + sgot->output_offset
- + off);
- outrel.r_info = ELF32_R_INFO (0, R_LM32_RELATIVE);
- outrel.r_addend = relocation;
- loc = srelgot->contents;
- loc += srelgot->reloc_count * sizeof (Elf32_External_Rela);
- bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc);
- ++srelgot->reloc_count;
- }
- local_got_offsets[r_symndx] |= 1;
- }
- relocation = sgot->output_offset + off;
- }
- /* Addend should be zero. */
- if (rel->r_addend != 0)
- _bfd_error_handler
- (_("internal error: addend should be zero for %s"),
- "R_LM32_16_GOT");
- r = _bfd_final_link_relocate (howto,
- input_bfd,
- input_section,
- contents,
- rel->r_offset,
- relocation,
- rel->r_addend);
- break;
- case R_LM32_GOTOFF_LO16:
- case R_LM32_GOTOFF_HI16:
- /* Relocation is offset from GOT. */
- BFD_ASSERT (sgot != NULL);
- relocation -= sgot->output_section->vma;
- /* Account for sign-extension. */
- if ((r_type == R_LM32_GOTOFF_HI16)
- && ((relocation + rel->r_addend) & 0x8000))
- rel->r_addend += 0x10000;
- r = _bfd_final_link_relocate (howto,
- input_bfd,
- input_section,
- contents,
- rel->r_offset,
- relocation,
- rel->r_addend);
- break;
- case R_LM32_32:
- if (IS_FDPIC (output_bfd))
- {
- if ((!h) || (h && h->root.type != bfd_link_hash_undefweak))
- {
- /* Only create .rofixup entries for relocs in loadable sections. */
- if ((bfd_section_flags (input_section->output_section)
- & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
- {
- /* Check address to be modified is writable. */
- if (_lm32fdpic_osec_readonly_p (output_bfd,
- input_section
- ->output_section))
- {
- info->callbacks->warning
- (info,
- _("cannot emit dynamic relocations in read-only section"),
- name, input_bfd, input_section, rel->r_offset);
- return false;
- }
- /* Create entry in .rofixup section. */
- _lm32fdpic_add_rofixup (output_bfd,
- lm32fdpic_fixup32_section (info),
- input_section->output_section->vma
- + input_section->output_offset
- + rel->r_offset);
- }
- }
- }
- /* Fall through. */
- default:
- r = _bfd_final_link_relocate (howto,
- input_bfd,
- input_section,
- contents,
- rel->r_offset,
- relocation,
- rel->r_addend);
- break;
- }
- }
- if (r != bfd_reloc_ok)
- {
- const char *msg = NULL;
- arelent bfd_reloc;
- if (! lm32_info_to_howto_rela (input_bfd, &bfd_reloc, rel))
- continue;
- howto = bfd_reloc.howto;
- if (h != NULL)
- name = h->root.root.string;
- else
- {
- name = (bfd_elf_string_from_elf_section
- (input_bfd, symtab_hdr->sh_link, sym->st_name));
- if (name == NULL || *name == '\0')
- name = bfd_section_name (sec);
- }
- switch (r)
- {
- case bfd_reloc_overflow:
- if ((h != NULL)
- && (h->root.type == bfd_link_hash_undefweak))
- break;
- (*info->callbacks->reloc_overflow)
- (info, (h ? &h->root : NULL), name, howto->name,
- (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
- break;
- case bfd_reloc_undefined:
- (*info->callbacks->undefined_symbol)
- (info, name, input_bfd, input_section, rel->r_offset, true);
- break;
- case bfd_reloc_outofrange:
- msg = _("internal error: out of range error");
- goto common_error;
- case bfd_reloc_notsupported:
- msg = _("internal error: unsupported relocation error");
- goto common_error;
- case bfd_reloc_dangerous:
- msg = _("internal error: dangerous error");
- goto common_error;
- default:
- msg = _("internal error: unknown error");
- /* fall through */
- common_error:
- (*info->callbacks->warning) (info, msg, name, input_bfd,
- input_section, rel->r_offset);
- break;
- }
- }
- }
- return true;
- }
- static asection *
- lm32_elf_gc_mark_hook (asection *sec,
- struct bfd_link_info *info,
- Elf_Internal_Rela *rel,
- struct elf_link_hash_entry *h,
- Elf_Internal_Sym *sym)
- {
- if (h != NULL)
- switch (ELF32_R_TYPE (rel->r_info))
- {
- case R_LM32_GNU_VTINHERIT:
- case R_LM32_GNU_VTENTRY:
- return NULL;
- }
- return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
- }
- /* Look through the relocs for a section during the first phase. */
- static bool
- lm32_elf_check_relocs (bfd *abfd,
- struct bfd_link_info *info,
- asection *sec,
- const Elf_Internal_Rela *relocs)
- {
- Elf_Internal_Shdr *symtab_hdr;
- struct elf_link_hash_entry **sym_hashes;
- const Elf_Internal_Rela *rel;
- const Elf_Internal_Rela *rel_end;
- struct elf_lm32_link_hash_table *htab;
- bfd *dynobj;
- if (bfd_link_relocatable (info))
- return true;
- symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
- sym_hashes = elf_sym_hashes (abfd);
- htab = lm32_elf_hash_table (info);
- if (htab == NULL)
- return false;
- dynobj = htab->root.dynobj;
- rel_end = relocs + sec->reloc_count;
- for (rel = relocs; rel < rel_end; rel++)
- {
- int r_type;
- struct elf_link_hash_entry *h;
- unsigned long r_symndx;
- r_symndx = ELF32_R_SYM (rel->r_info);
- r_type = ELF32_R_TYPE (rel->r_info);
- if (r_symndx < symtab_hdr->sh_info)
- h = NULL;
- else
- {
- h = sym_hashes[r_symndx - symtab_hdr->sh_info];
- while (h->root.type == bfd_link_hash_indirect
- || h->root.type == bfd_link_hash_warning)
- h = (struct elf_link_hash_entry *) h->root.u.i.link;
- }
- /* Some relocs require a global offset table. */
- if (htab->root.sgot == NULL)
- {
- switch (r_type)
- {
- case R_LM32_16_GOT:
- case R_LM32_GOTOFF_HI16:
- case R_LM32_GOTOFF_LO16:
- if (dynobj == NULL)
- htab->root.dynobj = dynobj = abfd;
- if (!_bfd_elf_create_got_section (dynobj, info))
- return false;
- break;
- }
- }
- /* Some relocs require a rofixup table. */
- if (IS_FDPIC (abfd))
- {
- switch (r_type)
- {
- case R_LM32_32:
- /* FDPIC requires a GOT if there is a .rofixup section
- (Normal ELF doesn't). */
- if (dynobj == NULL)
- htab->root.dynobj = dynobj = abfd;
- if (!_bfd_elf_create_got_section (dynobj, info))
- return false;
- /* Create .rofixup section */
- if (htab->sfixup32 == NULL)
- {
- if (! create_rofixup_section (dynobj, info))
- return false;
- }
- break;
- case R_LM32_16_GOT:
- case R_LM32_GOTOFF_HI16:
- case R_LM32_GOTOFF_LO16:
- /* Create .rofixup section. */
- if (htab->sfixup32 == NULL)
- {
- if (dynobj == NULL)
- htab->root.dynobj = dynobj = abfd;
- if (! create_rofixup_section (dynobj, info))
- return false;
- }
- break;
- }
- }
- switch (r_type)
- {
- case R_LM32_16_GOT:
- if (h != NULL)
- h->got.refcount += 1;
- else
- {
- bfd_signed_vma *local_got_refcounts;
- /* This is a global offset table entry for a local symbol. */
- local_got_refcounts = elf_local_got_refcounts (abfd);
- if (local_got_refcounts == NULL)
- {
- bfd_size_type size;
- size = symtab_hdr->sh_info;
- size *= sizeof (bfd_signed_vma);
- local_got_refcounts = bfd_zalloc (abfd, size);
- if (local_got_refcounts == NULL)
- return false;
- elf_local_got_refcounts (abfd) = local_got_refcounts;
- }
- local_got_refcounts[r_symndx] += 1;
- }
- break;
- /* This relocation describes the C++ object vtable hierarchy.
- Reconstruct it for later use during GC. */
- case R_LM32_GNU_VTINHERIT:
- if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
- return false;
- break;
- /* This relocation describes which C++ vtable entries are actually
- used. Record for later use during GC. */
- case R_LM32_GNU_VTENTRY:
- if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
- return false;
- break;
- }
- }
- return true;
- }
- /* Finish up the dynamic sections. */
- static bool
- lm32_elf_finish_dynamic_sections (bfd *output_bfd,
- struct bfd_link_info *info)
- {
- struct elf_lm32_link_hash_table *htab;
- bfd *dynobj;
- asection *sdyn;
- asection *sgot;
- htab = lm32_elf_hash_table (info);
- if (htab == NULL)
- return false;
- dynobj = htab->root.dynobj;
- sgot = htab->root.sgotplt;
- sdyn = bfd_get_linker_section (dynobj, ".dynamic");
- if (htab->root.dynamic_sections_created)
- {
- asection *splt;
- Elf32_External_Dyn *dyncon, *dynconend;
- BFD_ASSERT (sgot != NULL && sdyn != NULL);
- dyncon = (Elf32_External_Dyn *) sdyn->contents;
- dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
- for (; dyncon < dynconend; dyncon++)
- {
- Elf_Internal_Dyn dyn;
- asection *s;
- bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
- switch (dyn.d_tag)
- {
- default:
- break;
- case DT_PLTGOT:
- s = htab->root.sgotplt;
- goto get_vma;
- case DT_JMPREL:
- s = htab->root.srelplt;
- get_vma:
- dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
- bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
- break;
- case DT_PLTRELSZ:
- s = htab->root.srelplt;
- dyn.d_un.d_val = s->size;
- bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
- break;
- }
- }
- /* Fill in the first entry in the procedure linkage table. */
- splt = htab->root.splt;
- if (splt && splt->size > 0)
- {
- if (bfd_link_pic (info))
- {
- bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD0, splt->contents);
- bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD1, splt->contents + 4);
- bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD2, splt->contents + 8);
- bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD3, splt->contents + 12);
- bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD4, splt->contents + 16);
- }
- else
- {
- unsigned long addr;
- /* addr = .got + 4 */
- addr = sgot->output_section->vma + sgot->output_offset + 4;
- bfd_put_32 (output_bfd,
- PLT0_ENTRY_WORD0 | ((addr >> 16) & 0xffff),
- splt->contents);
- bfd_put_32 (output_bfd,
- PLT0_ENTRY_WORD1 | (addr & 0xffff),
- splt->contents + 4);
- bfd_put_32 (output_bfd, PLT0_ENTRY_WORD2, splt->contents + 8);
- bfd_put_32 (output_bfd, PLT0_ENTRY_WORD3, splt->contents + 12);
- bfd_put_32 (output_bfd, PLT0_ENTRY_WORD4, splt->contents + 16);
- }
- elf_section_data (splt->output_section)->this_hdr.sh_entsize =
- PLT_ENTRY_SIZE;
- }
- }
- /* Fill in the first three entries in the global offset table. */
- if (sgot && sgot->size > 0)
- {
- if (sdyn == NULL)
- bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
- else
- bfd_put_32 (output_bfd,
- sdyn->output_section->vma + sdyn->output_offset,
- sgot->contents);
- bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
- bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
- /* FIXME: This can be null if create_dynamic_sections wasn't called. */
- if (elf_section_data (sgot->output_section) != NULL)
- elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
- }
- if (lm32fdpic_fixup32_section (info))
- {
- struct elf_link_hash_entry *hgot = elf_hash_table (info)->hgot;
- bfd_vma got_value = hgot->root.u.def.value
- + hgot->root.u.def.section->output_section->vma
- + hgot->root.u.def.section->output_offset;
- struct bfd_link_hash_entry *hend;
- /* Last entry is pointer to GOT. */
- _lm32fdpic_add_rofixup (output_bfd, lm32fdpic_fixup32_section (info), got_value);
- /* Check we wrote enough entries. */
- if (lm32fdpic_fixup32_section (info)->size
- != (lm32fdpic_fixup32_section (info)->reloc_count * 4))
- {
- _bfd_error_handler
- ("LINKER BUG: .rofixup section size mismatch: size/4 %" PRId64
- " != relocs %d",
- (int64_t) (lm32fdpic_fixup32_section (info)->size / 4),
- lm32fdpic_fixup32_section (info)->reloc_count);
- return false;
- }
- hend = bfd_link_hash_lookup (info->hash, "__ROFIXUP_END__",
- false, false, true);
- if (hend
- && (hend->type == bfd_link_hash_defined
- || hend->type == bfd_link_hash_defweak)
- && hend->u.def.section->output_section != NULL)
- {
- bfd_vma value =
- lm32fdpic_fixup32_section (info)->output_section->vma
- + lm32fdpic_fixup32_section (info)->output_offset
- + lm32fdpic_fixup32_section (info)->size
- - hend->u.def.section->output_section->vma
- - hend->u.def.section->output_offset;
- BFD_ASSERT (hend->u.def.value == value);
- if (hend->u.def.value != value)
- {
- _bfd_error_handler
- ("LINKER BUG: .rofixup section hend->u.def.value != value: %"
- PRId64 " != %" PRId64,
- (int64_t) hend->u.def.value, (int64_t) value);
- return false;
- }
- }
- }
- return true;
- }
- /* Finish up dynamic symbol handling. We set the contents of various
- dynamic sections here. */
- static bool
- lm32_elf_finish_dynamic_symbol (bfd *output_bfd,
- struct bfd_link_info *info,
- struct elf_link_hash_entry *h,
- Elf_Internal_Sym *sym)
- {
- struct elf_lm32_link_hash_table *htab;
- bfd_byte *loc;
- htab = lm32_elf_hash_table (info);
- if (htab == NULL)
- return false;
- if (h->plt.offset != (bfd_vma) -1)
- {
- asection *splt;
- asection *sgot;
- asection *srela;
- bfd_vma plt_index;
- bfd_vma got_offset;
- Elf_Internal_Rela rela;
- /* This symbol has an entry in the procedure linkage table. Set
- it up. */
- BFD_ASSERT (h->dynindx != -1);
- splt = htab->root.splt;
- sgot = htab->root.sgotplt;
- srela = htab->root.srelplt;
- BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
- /* Get the index in the procedure linkage table which
- corresponds to this symbol. This is the index of this symbol
- in all the symbols for which we are making plt entries. The
- first entry in the procedure linkage table is reserved. */
- plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
- /* Get the offset into the .got table of the entry that
- corresponds to this function. Each .got entry is 4 bytes.
- The first three are reserved. */
- got_offset = (plt_index + 3) * 4;
- /* Fill in the entry in the procedure linkage table. */
- if (! bfd_link_pic (info))
- {
- /* TODO */
- }
- else
- {
- /* TODO */
- }
- /* Fill in the entry in the global offset table. */
- bfd_put_32 (output_bfd,
- (splt->output_section->vma
- + splt->output_offset
- + h->plt.offset
- + 12), /* same offset */
- sgot->contents + got_offset);
- /* Fill in the entry in the .rela.plt section. */
- rela.r_offset = (sgot->output_section->vma
- + sgot->output_offset
- + got_offset);
- rela.r_info = ELF32_R_INFO (h->dynindx, R_LM32_JMP_SLOT);
- rela.r_addend = 0;
- loc = srela->contents;
- loc += plt_index * sizeof (Elf32_External_Rela);
- bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
- if (!h->def_regular)
- {
- /* Mark the symbol as undefined, rather than as defined in
- the .plt section. Leave the value alone. */
- sym->st_shndx = SHN_UNDEF;
- }
- }
- if (h->got.offset != (bfd_vma) -1)
- {
- asection *sgot;
- asection *srela;
- Elf_Internal_Rela rela;
- /* This symbol has an entry in the global offset table. Set it
- up. */
- sgot = htab->root.sgot;
- srela = htab->root.srelgot;
- BFD_ASSERT (sgot != NULL && srela != NULL);
- rela.r_offset = (sgot->output_section->vma
- + sgot->output_offset
- + (h->got.offset &~ 1));
- /* If this is a -Bsymbolic link, and the symbol is defined
- locally, we just want to emit a RELATIVE reloc. Likewise if
- the symbol was forced to be local because of a version file.
- The entry in the global offset table will already have been
- initialized in the relocate_section function. */
- if (bfd_link_pic (info)
- && (info->symbolic
- || h->dynindx == -1
- || h->forced_local)
- && h->def_regular)
- {
- rela.r_info = ELF32_R_INFO (0, R_LM32_RELATIVE);
- rela.r_addend = (h->root.u.def.value
- + h->root.u.def.section->output_section->vma
- + h->root.u.def.section->output_offset);
- }
- else
- {
- BFD_ASSERT ((h->got.offset & 1) == 0);
- bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
- rela.r_info = ELF32_R_INFO (h->dynindx, R_LM32_GLOB_DAT);
- rela.r_addend = 0;
- }
- loc = srela->contents;
- loc += srela->reloc_count * sizeof (Elf32_External_Rela);
- bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
- ++srela->reloc_count;
- }
- if (h->needs_copy)
- {
- asection *s;
- Elf_Internal_Rela rela;
- /* This symbols needs a copy reloc. Set it up. */
- BFD_ASSERT (h->dynindx != -1
- && (h->root.type == bfd_link_hash_defined
- || h->root.type == bfd_link_hash_defweak));
- s = bfd_get_linker_section (htab->root.dynobj, ".rela.bss");
- BFD_ASSERT (s != NULL);
- rela.r_offset = (h->root.u.def.value
- + h->root.u.def.section->output_section->vma
- + h->root.u.def.section->output_offset);
- rela.r_info = ELF32_R_INFO (h->dynindx, R_LM32_COPY);
- rela.r_addend = 0;
- loc = s->contents;
- loc += s->reloc_count * sizeof (Elf32_External_Rela);
- bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
- ++s->reloc_count;
- }
- /* Mark some specially defined symbols as absolute. */
- if (h == htab->root.hdynamic || h == htab->root.hgot)
- sym->st_shndx = SHN_ABS;
- return true;
- }
- static enum elf_reloc_type_class
- lm32_elf_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
- const asection *rel_sec ATTRIBUTE_UNUSED,
- const Elf_Internal_Rela *rela)
- {
- switch ((int) ELF32_R_TYPE (rela->r_info))
- {
- case R_LM32_RELATIVE: return reloc_class_relative;
- case R_LM32_JMP_SLOT: return reloc_class_plt;
- case R_LM32_COPY: return reloc_class_copy;
- default: return reloc_class_normal;
- }
- }
- /* Adjust a symbol defined by a dynamic object and referenced by a
- regular object. The current definition is in some section of the
- dynamic object, but we're not including those sections. We have to
- change the definition to something the rest of the link can
- understand. */
- static bool
- lm32_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
- struct elf_link_hash_entry *h)
- {
- struct elf_lm32_link_hash_table *htab;
- bfd *dynobj;
- asection *s;
- dynobj = elf_hash_table (info)->dynobj;
- /* Make sure we know what is going on here. */
- BFD_ASSERT (dynobj != NULL
- && (h->needs_plt
- || h->is_weakalias
- || (h->def_dynamic
- && h->ref_regular
- && !h->def_regular)));
- /* If this is a function, put it in the procedure linkage table. We
- will fill in the contents of the procedure linkage table later,
- when we know the address of the .got section. */
- if (h->type == STT_FUNC
- || h->needs_plt)
- {
- if (! bfd_link_pic (info)
- && !h->def_dynamic
- && !h->ref_dynamic
- && h->root.type != bfd_link_hash_undefweak
- && h->root.type != bfd_link_hash_undefined)
- {
- /* This case can occur if we saw a PLT reloc in an input
- file, but the symbol was never referred to by a dynamic
- object. In such a case, we don't actually need to build
- a procedure linkage table, and we can just do a PCREL
- reloc instead. */
- h->plt.offset = (bfd_vma) -1;
- h->needs_plt = 0;
- }
- return true;
- }
- else
- h->plt.offset = (bfd_vma) -1;
- /* 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 (h->is_weakalias)
- {
- struct elf_link_hash_entry *def = weakdef (h);
- BFD_ASSERT (def->root.type == bfd_link_hash_defined);
- h->root.u.def.section = def->root.u.def.section;
- h->root.u.def.value = def->root.u.def.value;
- return true;
- }
- /* This is a reference to a symbol defined by a dynamic object which
- is not a function. */
- /* If we are creating a shared library, we must presume that the
- only references to the symbol are via the global offset table.
- For such cases we need not do anything here; the relocations will
- be handled correctly by relocate_section. */
- if (bfd_link_pic (info))
- return true;
- /* If there are no references to this symbol that do not use the
- GOT, we don't need to generate a copy reloc. */
- if (!h->non_got_ref)
- return true;
- /* If -z nocopyreloc was given, we won't generate them either. */
- if (0 && info->nocopyreloc)
- {
- h->non_got_ref = 0;
- return true;
- }
- /* If we don't find any dynamic relocs in read-only sections, then
- we'll be keeping the dynamic relocs and avoiding the copy reloc. */
- if (0 && !_bfd_elf_readonly_dynrelocs (h))
- {
- h->non_got_ref = 0;
- return true;
- }
- /* We must allocate the symbol in our .dynbss section, which will
- become part of the .bss section of the executable. There will be
- an entry for this symbol in the .dynsym section. The dynamic
- object will contain position independent code, so all references
- from the dynamic object to this symbol will go through the global
- offset table. The dynamic linker will use the .dynsym entry to
- determine the address it must put in the global offset table, so
- both the dynamic object and the regular object will refer to the
- same memory location for the variable. */
- htab = lm32_elf_hash_table (info);
- if (htab == NULL)
- return false;
- s = htab->sdynbss;
- BFD_ASSERT (s != NULL);
- /* We must generate a R_LM32_COPY reloc to tell the dynamic linker
- to copy the initial value out of the dynamic object and into the
- runtime process image. We need to remember the offset into the
- .rela.bss section we are going to use. */
- if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
- {
- asection *srel;
- srel = htab->srelbss;
- BFD_ASSERT (srel != NULL);
- srel->size += sizeof (Elf32_External_Rela);
- h->needs_copy = 1;
- }
- return _bfd_elf_adjust_dynamic_copy (info, h, s);
- }
- /* Allocate space in .plt, .got and associated reloc sections for
- dynamic relocs. */
- static bool
- allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
- {
- struct bfd_link_info *info;
- struct elf_lm32_link_hash_table *htab;
- struct elf_dyn_relocs *p;
- if (h->root.type == bfd_link_hash_indirect)
- return true;
- info = (struct bfd_link_info *) inf;
- htab = lm32_elf_hash_table (info);
- if (htab == NULL)
- return false;
- if (htab->root.dynamic_sections_created
- && h->plt.refcount > 0)
- {
- /* Make sure this symbol is output as a dynamic symbol.
- Undefined weak syms won't yet be marked as dynamic. */
- if (h->dynindx == -1
- && !h->forced_local)
- {
- if (! bfd_elf_link_record_dynamic_symbol (info, h))
- return false;
- }
- if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h))
- {
- asection *s = htab->root.splt;
- /* If this is the first .plt entry, make room for the special
- first entry. */
- if (s->size == 0)
- s->size += PLT_ENTRY_SIZE;
- h->plt.offset = s->size;
- /* If this symbol is not defined in a regular file, and we are
- not generating a shared library, then set the symbol to this
- location in the .plt. This is required to make function
- pointers compare as equal between the normal executable and
- the shared library. */
- if (! bfd_link_pic (info)
- && !h->def_regular)
- {
- h->root.u.def.section = s;
- h->root.u.def.value = h->plt.offset;
- }
- /* Make room for this entry. */
- s->size += PLT_ENTRY_SIZE;
- /* We also need to make an entry in the .got.plt section, which
- will be placed in the .got section by the linker script. */
- htab->root.sgotplt->size += 4;
- /* We also need to make an entry in the .rel.plt section. */
- htab->root.srelplt->size += sizeof (Elf32_External_Rela);
- }
- else
- {
- h->plt.offset = (bfd_vma) -1;
- h->needs_plt = 0;
- }
- }
- else
- {
- h->plt.offset = (bfd_vma) -1;
- h->needs_plt = 0;
- }
- if (h->got.refcount > 0)
- {
- asection *s;
- bool dyn;
- /* Make sure this symbol is output as a dynamic symbol.
- Undefined weak syms won't yet be marked as dynamic. */
- if (h->dynindx == -1
- && !h->forced_local)
- {
- if (! bfd_elf_link_record_dynamic_symbol (info, h))
- return false;
- }
- s = htab->root.sgot;
- h->got.offset = s->size;
- s->size += 4;
- dyn = htab->root.dynamic_sections_created;
- if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h))
- htab->root.srelgot->size += sizeof (Elf32_External_Rela);
- }
- else
- h->got.offset = (bfd_vma) -1;
- if (h->dyn_relocs == NULL)
- return true;
- /* In the shared -Bsymbolic case, discard space allocated for
- dynamic pc-relative relocs against symbols which turn out to be
- defined in regular objects. For the normal shared case, discard
- space for pc-relative relocs that have become local due to symbol
- visibility changes. */
- if (bfd_link_pic (info))
- {
- if (h->def_regular
- && (h->forced_local
- || info->symbolic))
- {
- struct elf_dyn_relocs **pp;
- for (pp = &h->dyn_relocs; (p = *pp) != NULL;)
- {
- p->count -= p->pc_count;
- p->pc_count = 0;
- if (p->count == 0)
- *pp = p->next;
- else
- pp = &p->next;
- }
- }
- /* Also discard relocs on undefined weak syms with non-default
- visibility. */
- if (h->dyn_relocs != NULL
- && h->root.type == bfd_link_hash_undefweak)
- {
- if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
- h->dyn_relocs = NULL;
- /* Make sure undefined weak symbols are output as a dynamic
- symbol in PIEs. */
- else if (h->dynindx == -1
- && !h->forced_local)
- {
- if (! bfd_elf_link_record_dynamic_symbol (info, h))
- return false;
- }
- }
- }
- else
- {
- /* For the non-shared case, discard space for relocs against
- symbols which turn out to need copy relocs or are not
- dynamic. */
- if (!h->non_got_ref
- && ((h->def_dynamic
- && !h->def_regular)
- || (htab->root.dynamic_sections_created
- && (h->root.type == bfd_link_hash_undefweak
- || h->root.type == bfd_link_hash_undefined))))
- {
- /* Make sure this symbol is output as a dynamic symbol.
- Undefined weak syms won't yet be marked as dynamic. */
- if (h->dynindx == -1
- && !h->forced_local)
- {
- if (! bfd_elf_link_record_dynamic_symbol (info, h))
- return false;
- }
- /* If that succeeded, we know we'll be keeping all the
- relocs. */
- if (h->dynindx != -1)
- goto keep;
- }
- h->dyn_relocs = NULL;
- keep: ;
- }
- /* Finally, allocate space. */
- for (p = h->dyn_relocs; p != NULL; p = p->next)
- {
- asection *sreloc = elf_section_data (p->sec)->sreloc;
- sreloc->size += p->count * sizeof (Elf32_External_Rela);
- }
- return true;
- }
- /* Set the sizes of the dynamic sections. */
- static bool
- lm32_elf_size_dynamic_sections (bfd *output_bfd,
- struct bfd_link_info *info)
- {
- struct elf_lm32_link_hash_table *htab;
- bfd *dynobj;
- asection *s;
- bool relocs;
- bfd *ibfd;
- htab = lm32_elf_hash_table (info);
- if (htab == NULL)
- return false;
- dynobj = htab->root.dynobj;
- BFD_ASSERT (dynobj != NULL);
- if (htab->root.dynamic_sections_created)
- {
- /* Set the contents of the .interp section to the interpreter. */
- if (bfd_link_executable (info) && !info->nointerp)
- {
- s = bfd_get_linker_section (dynobj, ".interp");
- BFD_ASSERT (s != NULL);
- s->size = sizeof ELF_DYNAMIC_INTERPRETER;
- s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
- }
- }
- /* Set up .got 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_got;
- bfd_signed_vma *end_local_got;
- bfd_size_type locsymcount;
- Elf_Internal_Shdr *symtab_hdr;
- asection *srel;
- if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
- continue;
- for (s = ibfd->sections; s != NULL; s = s->next)
- {
- struct elf_dyn_relocs *p;
- for (p = ((struct elf_dyn_relocs *)
- elf_section_data (s)->local_dynrel);
- p != NULL;
- p = p->next)
- {
- if (! bfd_is_abs_section (p->sec)
- && bfd_is_abs_section (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 (p->count != 0)
- {
- srel = elf_section_data (p->sec)->sreloc;
- srel->size += p->count * sizeof (Elf32_External_Rela);
- if ((p->sec->output_section->flags & SEC_READONLY) != 0)
- info->flags |= DF_TEXTREL;
- }
- }
- }
- local_got = elf_local_got_refcounts (ibfd);
- if (!local_got)
- continue;
- symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
- locsymcount = symtab_hdr->sh_info;
- end_local_got = local_got + locsymcount;
- s = htab->root.sgot;
- srel = htab->root.srelgot;
- for (; local_got < end_local_got; ++local_got)
- {
- if (*local_got > 0)
- {
- *local_got = s->size;
- s->size += 4;
- if (bfd_link_pic (info))
- srel->size += sizeof (Elf32_External_Rela);
- }
- else
- *local_got = (bfd_vma) -1;
- }
- }
- /* Allocate global sym .plt and .got entries, and space for global
- sym dynamic relocs. */
- elf_link_hash_traverse (&htab->root, allocate_dynrelocs, info);
- /* We now have determined the sizes of the various dynamic sections.
- Allocate memory for them. */
- relocs = false;
- for (s = dynobj->sections; s != NULL; s = s->next)
- {
- if ((s->flags & SEC_LINKER_CREATED) == 0)
- continue;
- if (s == htab->root.splt
- || s == htab->root.sgot
- || s == htab->root.sgotplt
- || s == htab->sdynbss)
- {
- /* Strip this section if we don't need it; see the
- comment below. */
- }
- else if (startswith (bfd_section_name (s), ".rela"))
- {
- if (s->size != 0 && s != htab->root.srelplt)
- relocs = true;
- /* We use the reloc_count field as a counter if we need
- to copy relocs into the output file. */
- s->reloc_count = 0;
- }
- else
- /* It's not one of our sections, so don't allocate space. */
- continue;
- if (s->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. */
- s->flags |= SEC_EXCLUDE;
- continue;
- }
- if ((s->flags & SEC_HAS_CONTENTS) == 0)
- continue;
- /* Allocate memory for the section contents. 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_LM32_NONE reloc instead
- of garbage. */
- s->contents = bfd_zalloc (dynobj, s->size);
- if (s->contents == NULL)
- return false;
- }
- if (!_bfd_elf_add_dynamic_tags (output_bfd, info, relocs))
- return false;
- /* Allocate .rofixup section. */
- if (IS_FDPIC (output_bfd))
- {
- struct weak_symbol_list *list_start = NULL, *list_end = NULL;
- int rgot_weak_count = 0;
- int r32_count = 0;
- int rgot_count = 0;
- /* Look for deleted sections. */
- for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
- {
- for (s = ibfd->sections; s != NULL; s = s->next)
- {
- if (s->reloc_count)
- {
- /* Count relocs that need .rofixup entires. */
- Elf_Internal_Rela *internal_relocs, *end;
- internal_relocs = elf_section_data (s)->relocs;
- if (internal_relocs == NULL)
- internal_relocs = (_bfd_elf_link_read_relocs (ibfd, s, NULL, NULL, false));
- if (internal_relocs != NULL)
- {
- end = internal_relocs + s->reloc_count;
- while (internal_relocs < end)
- {
- Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
- struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
- unsigned long r_symndx;
- struct elf_link_hash_entry *h;
- symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
- sym_hashes = elf_sym_hashes (ibfd);
- r_symndx = ELF32_R_SYM (internal_relocs->r_info);
- h = NULL;
- if (r_symndx < symtab_hdr->sh_info)
- {
- }
- else
- {
- h = sym_hashes[r_symndx - symtab_hdr->sh_info];
- while (h->root.type == bfd_link_hash_indirect
- || h->root.type == bfd_link_hash_warning)
- h = (struct elf_link_hash_entry *) h->root.u.i.link;
- }
- /* Don't generate entries for weak symbols. */
- if (!h || (h && h->root.type != bfd_link_hash_undefweak))
- {
- if (!discarded_section (s) && !((bfd_section_flags (s) & SEC_ALLOC) == 0))
- {
- switch (ELF32_R_TYPE (internal_relocs->r_info))
- {
- case R_LM32_32:
- r32_count++;
- break;
- case R_LM32_16_GOT:
- rgot_count++;
- break;
- }
- }
- }
- else
- {
- struct weak_symbol_list *current, *new_entry;
- /* Is this symbol already in the list? */
- for (current = list_start; current; current = current->next)
- {
- if (!strcmp (current->name, h->root.root.string))
- break;
- }
- if (!current && !discarded_section (s) && (bfd_section_flags (s) & SEC_ALLOC))
- {
- /* Will this have an entry in the GOT. */
- if (ELF32_R_TYPE (internal_relocs->r_info) == R_LM32_16_GOT)
- {
- /* Create a new entry. */
- new_entry = malloc (sizeof (struct weak_symbol_list));
- if (!new_entry)
- return false;
- new_entry->name = h->root.root.string;
- new_entry->next = NULL;
- /* Add to list */
- if (list_start == NULL)
- {
- list_start = new_entry;
- list_end = new_entry;
- }
- else
- {
- list_end->next = new_entry;
- list_end = new_entry;
- }
- /* Increase count of undefined weak symbols in the got. */
- rgot_weak_count++;
- }
- }
- }
- internal_relocs++;
- }
- }
- else
- return false;
- }
- }
- }
- /* Free list. */
- while (list_start)
- {
- list_end = list_start->next;
- free (list_start);
- list_start = list_end;
- }
- /* Size sections. */
- lm32fdpic_fixup32_section (info)->size
- = (r32_count + (htab->root.sgot->size / 4) - rgot_weak_count + 1) * 4;
- if (lm32fdpic_fixup32_section (info)->size == 0)
- lm32fdpic_fixup32_section (info)->flags |= SEC_EXCLUDE;
- else
- {
- lm32fdpic_fixup32_section (info)->contents =
- bfd_zalloc (dynobj, lm32fdpic_fixup32_section (info)->size);
- if (lm32fdpic_fixup32_section (info)->contents == NULL)
- return false;
- }
- }
- return true;
- }
- /* Create dynamic sections when linking against a dynamic object. */
- static bool
- lm32_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
- {
- struct elf_lm32_link_hash_table *htab;
- flagword flags, pltflags;
- asection *s;
- const struct elf_backend_data *bed = get_elf_backend_data (abfd);
- int ptralign = 2; /* 32bit */
- htab = lm32_elf_hash_table (info);
- if (htab == NULL)
- return false;
- /* Make sure we have a GOT - For the case where we have a dynamic object
- but none of the relocs in check_relocs */
- if (!_bfd_elf_create_got_section (abfd, info))
- return false;
- if (IS_FDPIC (abfd) && (htab->sfixup32 == NULL))
- {
- if (! create_rofixup_section (abfd, info))
- return false;
- }
- /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
- .rel[a].bss sections. */
- flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
- | SEC_LINKER_CREATED);
- pltflags = flags;
- pltflags |= SEC_CODE;
- if (bed->plt_not_loaded)
- pltflags &= ~ (SEC_LOAD | SEC_HAS_CONTENTS);
- if (bed->plt_readonly)
- pltflags |= SEC_READONLY;
- s = bfd_make_section_anyway_with_flags (abfd, ".plt", pltflags);
- htab->root.splt = s;
- if (s == NULL
- || !bfd_set_section_alignment (s, bed->plt_alignment))
- return false;
- if (bed->want_plt_sym)
- {
- /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
- .plt section. */
- struct bfd_link_hash_entry *bh = NULL;
- struct elf_link_hash_entry *h;
- if (! (_bfd_generic_link_add_one_symbol
- (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s,
- (bfd_vma) 0, NULL, false,
- get_elf_backend_data (abfd)->collect, &bh)))
- return false;
- h = (struct elf_link_hash_entry *) bh;
- h->def_regular = 1;
- h->type = STT_OBJECT;
- htab->root.hplt = h;
- if (bfd_link_pic (info)
- && ! bfd_elf_link_record_dynamic_symbol (info, h))
- return false;
- }
- s = bfd_make_section_anyway_with_flags (abfd,
- bed->default_use_rela_p
- ? ".rela.plt" : ".rel.plt",
- flags | SEC_READONLY);
- htab->root.srelplt = s;
- if (s == NULL
- || !bfd_set_section_alignment (s, ptralign))
- return false;
- if (htab->root.sgot == NULL
- && !_bfd_elf_create_got_section (abfd, info))
- return false;
- if (bed->want_dynbss)
- {
- /* The .dynbss section is a place to put symbols which are defined
- by dynamic objects, are referenced by regular objects, and are
- not functions. We must allocate space for them in the process
- image and use a R_*_COPY reloc to tell the dynamic linker to
- initialize them at run time. The linker script puts the .dynbss
- section into the .bss section of the final image. */
- s = bfd_make_section_anyway_with_flags (abfd, ".dynbss",
- SEC_ALLOC | SEC_LINKER_CREATED);
- htab->sdynbss = s;
- if (s == NULL)
- return false;
- /* The .rel[a].bss section holds copy relocs. This section is not
- normally needed. We need to create it here, though, so that the
- linker will map it to an output section. We can't just create it
- only if we need it, because we will not know whether we need it
- until we have seen all the input files, and the first time the
- main linker code calls BFD after examining all the input files
- (size_dynamic_sections) the input sections have already been
- mapped to the output sections. If the section turns out not to
- be needed, we can discard it later. We will never need this
- section when generating a shared object, since they do not use
- copy relocs. */
- if (! bfd_link_pic (info))
- {
- s = bfd_make_section_anyway_with_flags (abfd,
- (bed->default_use_rela_p
- ? ".rela.bss" : ".rel.bss"),
- flags | SEC_READONLY);
- htab->srelbss = s;
- if (s == NULL
- || !bfd_set_section_alignment (s, ptralign))
- return false;
- }
- }
- return true;
- }
- static bool
- lm32_elf_always_size_sections (bfd *output_bfd, struct bfd_link_info *info)
- {
- if (!bfd_link_relocatable (info))
- {
- if (!bfd_elf_stack_segment_size (output_bfd, info,
- "__stacksize", DEFAULT_STACK_SIZE))
- return false;
- asection *sec = bfd_get_section_by_name (output_bfd, ".stack");
- if (sec)
- sec->size = info->stacksize >= 0 ? info->stacksize : 0;
- }
- return true;
- }
- static bool
- lm32_elf_fdpic_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
- {
- unsigned i;
- if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
- || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
- return true;
- if (! _bfd_elf_copy_private_bfd_data (ibfd, obfd))
- return false;
- if (! elf_tdata (ibfd) || ! elf_tdata (ibfd)->phdr
- || ! elf_tdata (obfd) || ! elf_tdata (obfd)->phdr)
- return true;
- /* Copy the stack size. */
- for (i = 0; i < elf_elfheader (ibfd)->e_phnum; i++)
- if (elf_tdata (ibfd)->phdr[i].p_type == PT_GNU_STACK)
- {
- Elf_Internal_Phdr *iphdr = &elf_tdata (ibfd)->phdr[i];
- for (i = 0; i < elf_elfheader (obfd)->e_phnum; i++)
- if (elf_tdata (obfd)->phdr[i].p_type == PT_GNU_STACK)
- {
- memcpy (&elf_tdata (obfd)->phdr[i], iphdr, sizeof (*iphdr));
- /* Rewrite the phdrs, since we're only called after they were first written. */
- if (bfd_seek (obfd, (bfd_signed_vma) get_elf_backend_data (obfd)
- ->s->sizeof_ehdr, SEEK_SET) != 0
- || get_elf_backend_data (obfd)->s->write_out_phdrs (obfd, elf_tdata (obfd)->phdr,
- elf_elfheader (obfd)->e_phnum) != 0)
- return false;
- break;
- }
- break;
- }
- return true;
- }
- #define ELF_ARCH bfd_arch_lm32
- #define ELF_TARGET_ID LM32_ELF_DATA
- #define ELF_MACHINE_CODE EM_LATTICEMICO32
- #define ELF_MAXPAGESIZE 0x1000
- #define TARGET_BIG_SYM lm32_elf32_vec
- #define TARGET_BIG_NAME "elf32-lm32"
- #define bfd_elf32_bfd_reloc_type_lookup lm32_reloc_type_lookup
- #define bfd_elf32_bfd_reloc_name_lookup lm32_reloc_name_lookup
- #define elf_info_to_howto lm32_info_to_howto_rela
- #define elf_info_to_howto_rel NULL
- #define elf_backend_rela_normal 1
- #define elf_backend_object_p lm32_elf_object_p
- #define elf_backend_final_write_processing lm32_elf_final_write_processing
- #define elf_backend_stack_align 8
- #define elf_backend_can_gc_sections 1
- #define elf_backend_can_refcount 1
- #define elf_backend_gc_mark_hook lm32_elf_gc_mark_hook
- #define elf_backend_plt_readonly 1
- #define elf_backend_want_got_plt 1
- #define elf_backend_want_plt_sym 0
- #define elf_backend_got_header_size 12
- #define elf_backend_dtrel_excludes_plt 1
- #define bfd_elf32_bfd_link_hash_table_create lm32_elf_link_hash_table_create
- #define elf_backend_check_relocs lm32_elf_check_relocs
- #define elf_backend_reloc_type_class lm32_elf_reloc_type_class
- #define elf_backend_size_dynamic_sections lm32_elf_size_dynamic_sections
- #define elf_backend_omit_section_dynsym _bfd_elf_omit_section_dynsym_all
- #define elf_backend_create_dynamic_sections lm32_elf_create_dynamic_sections
- #define elf_backend_finish_dynamic_sections lm32_elf_finish_dynamic_sections
- #define elf_backend_adjust_dynamic_symbol lm32_elf_adjust_dynamic_symbol
- #define elf_backend_finish_dynamic_symbol lm32_elf_finish_dynamic_symbol
- #define elf_backend_relocate_section lm32_elf_relocate_section
- #include "elf32-target.h"
- #undef ELF_MAXPAGESIZE
- #define ELF_MAXPAGESIZE 0x4000
- #undef TARGET_BIG_SYM
- #define TARGET_BIG_SYM lm32_elf32_fdpic_vec
- #undef TARGET_BIG_NAME
- #define TARGET_BIG_NAME "elf32-lm32fdpic"
- #undef elf32_bed
- #define elf32_bed elf32_lm32fdpic_bed
- #undef elf_backend_always_size_sections
- #define elf_backend_always_size_sections lm32_elf_always_size_sections
- #undef bfd_elf32_bfd_copy_private_bfd_data
- #define bfd_elf32_bfd_copy_private_bfd_data lm32_elf_fdpic_copy_private_bfd_data
- #include "elf32-target.h"
|