diff options
Diffstat (limited to 'bfd/elf32-lm32.c')
| -rw-r--r-- | bfd/elf32-lm32.c | 2909 |
1 files changed, 2909 insertions, 0 deletions
diff --git a/bfd/elf32-lm32.c b/bfd/elf32-lm32.c new file mode 100644 index 0000000..620dc50 --- /dev/null +++ b/bfd/elf32-lm32.c @@ -0,0 +1,2909 @@ +/* Lattice Mico32-specific support for 32-bit ELF + Copyright 2008 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 "bfd.h" +#include "sysdep.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 bfd_elf32_lm32fdpic_vec; + +#define IS_FDPIC(bfd) ((bfd)->xvec == &bfd_elf32_lm32fdpic_vec) + +static bfd_reloc_status_type lm32_elf_gprel_reloc + (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); + +/* The linker needs to keep track of the number of relocs that it + decides to copy as dynamic relocs in check_relocs for each symbol. + This is so that it can later discard them if they are found to be + unnecessary. We store the information in a field extending the + regular ELF linker hash table. */ + +struct elf_lm32_dyn_relocs +{ + struct elf_lm32_dyn_relocs *next; + + /* The input section of the reloc. */ + asection *sec; + + /* Total number of relocs copied for the input section. */ + bfd_size_type count; + + /* Number of pc-relative relocs copied for the input section. */ + bfd_size_type pc_count; +}; + +/* lm32 ELF linker hash entry. */ + +struct elf_lm32_link_hash_entry +{ + struct elf_link_hash_entry root; + + /* Track dynamic relocs copied for this symbol. */ + struct elf_lm32_dyn_relocs *dyn_relocs; +}; + +/* 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 *sgot; + asection *sgotplt; + asection *srelgot; + asection *sfixup32; + asection *splt; + asection *srelplt; + asection *sdynbss; + asection *srelbss; + + int relocs32; +}; + +/* Get the lm32 ELF linker hash table from a link_info structure. */ + +#define lm32_elf_hash_table(p) \ + ((struct elf_lm32_link_hash_table *) ((p)->hash)) + +#define lm32fdpic_got_section(info) \ + (lm32_elf_hash_table (info)->sgot) +#define lm32fdpic_gotrel_section(info) \ + (lm32_elf_hash_table (info)->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 entry in an lm32 ELF linker hash table. */ + +static struct bfd_hash_entry * +lm32_elf_link_hash_newfunc (struct bfd_hash_entry *entry, + struct bfd_hash_table *table, + const char *string) +{ + struct elf_lm32_link_hash_entry *ret = + (struct elf_lm32_link_hash_entry *) entry; + + /* Allocate the structure if it has not already been allocated by a + subclass. */ + if (ret == NULL) + ret = bfd_hash_allocate (table, + sizeof (struct elf_lm32_link_hash_entry)); + if (ret == NULL) + return NULL; + + /* Call the allocation method of the superclass. */ + ret = ((struct elf_lm32_link_hash_entry *) + _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, + table, string)); + if (ret != NULL) + { + struct elf_lm32_link_hash_entry *eh; + + eh = (struct elf_lm32_link_hash_entry *) ret; + eh->dyn_relocs = NULL; + } + + return (struct bfd_hash_entry *) ret; +} + +/* 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; + bfd_size_type amt = sizeof (struct elf_lm32_link_hash_table); + + ret = bfd_malloc (amt); + if (ret == NULL) + return NULL; + + if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, + lm32_elf_link_hash_newfunc, + sizeof (struct elf_lm32_link_hash_entry))) + { + free (ret); + return NULL; + } + + ret->sgot = NULL; + ret->sgotplt = NULL; + ret->srelgot = NULL; + ret->sfixup32 = NULL; + ret->splt = NULL; + ret->srelplt = NULL; + ret->sdynbss = NULL; + ret->srelbss = NULL; + ret->relocs32 = 0; + + 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 .got, .gotplt, and .rela.got sections in DYNOBJ, and set up + shortcuts to them in our hash table. */ + +static bfd_boolean +create_got_section (bfd *dynobj, struct bfd_link_info *info) +{ + struct elf_lm32_link_hash_table *htab; + asection *s; + + /* This function may be called more than once. */ + s = bfd_get_section_by_name (dynobj, ".got"); + if (s != NULL && (s->flags & SEC_LINKER_CREATED) != 0) + return TRUE; + + if (! _bfd_elf_create_got_section (dynobj, info)) + return FALSE; + + htab = lm32_elf_hash_table (info); + htab->sgot = bfd_get_section_by_name (dynobj, ".got"); + htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); + if (! htab->sgot || ! htab->sgotplt) + abort (); + + htab->srelgot = bfd_make_section_with_flags (dynobj, ".rela.got", + (SEC_ALLOC + | SEC_LOAD + | SEC_HAS_CONTENTS + | SEC_IN_MEMORY + | SEC_LINKER_CREATED + | SEC_READONLY)); + if (htab->srelgot == NULL + || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2)) + return FALSE; + + return TRUE; +} + +/* Create .rofixup sections in DYNOBJ, and set up + shortcuts to them in our hash table. */ + +static bfd_boolean +create_rofixup_section (bfd *dynobj, struct bfd_link_info *info) +{ + struct elf_lm32_link_hash_table *htab; + htab = lm32_elf_hash_table (info); + + /* Fixup section for R_LM32_32 relocs */ + lm32fdpic_fixup32_section (info) = bfd_make_section_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 (dynobj, 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 */ + 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_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 void +lm32_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED, + arelent *cache_ptr, + Elf_Internal_Rela *dst) +{ + unsigned int r_type; + + r_type = ELF32_R_TYPE (dst->r_info); + BFD_ASSERT (r_type < (unsigned int) R_LM32_max); + cache_ptr->howto = &lm32_elf_howto_table[r_type]; +} + +/* Set the right machine number for an Lattice Mico32 ELF file. */ + +static bfd_boolean +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 void +lm32_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED) +{ + 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 (); + } +} + +/* Set the GP value for OUTPUT_BFD. Returns FALSE if this is a + dangerous relocation. */ + +static bfd_boolean +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, bfd_boolean 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_tdata (output_bfd)->segment_map, + 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 bfd_boolean +_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 bfd_boolean +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 *dynobj; + bfd_vma *local_got_offsets; + asection *sgot, *splt, *sreloc; + + dynobj = htab->root.dynobj; + local_got_offsets = elf_local_got_offsets (input_bfd); + + sgot = htab->sgot; + splt = htab->splt; + sreloc = NULL; + + 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; + asection *osec; + + 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; + osec = 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 (input_bfd, sec) : name; + } + else + { + /* It's a global symbol. */ + bfd_boolean unresolved_reloc; + bfd_boolean warned; + + RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, + r_symndx, symtab_hdr, sym_hashes, + h, sec, relocation, + unresolved_reloc, warned); + osec = sec; + name = h->root.root.string; + } + + if (sec != NULL && elf_discarded_section (sec)) + { + /* For relocs against symbols from removed linkonce sections, + or sections discarded by a linker script, we just want the + section contents zeroed. Avoid any special processing. */ + _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset); + rel->r_info = 0; + rel->r_addend = 0; + continue; + } + + if (info->relocatable) + { + /* 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) + { + bfd_boolean 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, info->shared, h) + || (info->shared + && (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 (info->shared) + { + asection *srelgot; + Elf_Internal_Rela outrel; + + /* We need to generate a R_LM32_RELATIVE reloc + for the dynamic linker. */ + srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); + 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 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_get_section_flags (output_bfd, 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 *name; + const char *msg = NULL; + arelent bfd_reloc; + reloc_howto_type *howto; + + lm32_info_to_howto_rela (input_bfd, &bfd_reloc, rel); + 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 (input_bfd, sec); + } + + switch (r) + { + case bfd_reloc_overflow: + if ((h != NULL) + && (h->root.type == bfd_link_hash_undefweak)) + break; + if (! ((*info->callbacks->reloc_overflow) + (info, (h ? &h->root : NULL), name, howto->name, + (bfd_vma) 0, input_bfd, input_section, rel->r_offset))) + return FALSE; + break; + + case bfd_reloc_undefined: + if (! ((*info->callbacks->undefined_symbol) + (info, name, input_bfd, input_section, + rel->r_offset, TRUE))) + return FALSE; + 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: + if (!((*info->callbacks->warning) + (info, msg, name, input_bfd, input_section, + rel->r_offset))) + return FALSE; + 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); +} + +static bfd_boolean +lm32_elf_gc_sweep_hook (bfd *abfd, + struct bfd_link_info *info ATTRIBUTE_UNUSED, + asection *sec, + const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED) +{ + /* Update the got entry reference counts for the section being removed. */ + Elf_Internal_Shdr *symtab_hdr; + struct elf_link_hash_entry **sym_hashes; + bfd_signed_vma *local_got_refcounts; + const Elf_Internal_Rela *rel, *relend; + + elf_section_data (sec)->local_dynrel = NULL; + + symtab_hdr = &elf_tdata (abfd)->symtab_hdr; + sym_hashes = elf_sym_hashes (abfd); + local_got_refcounts = elf_local_got_refcounts (abfd); + + relend = relocs + sec->reloc_count; + for (rel = relocs; rel < relend; rel++) + { + unsigned long r_symndx; + struct elf_link_hash_entry *h = NULL; + + r_symndx = ELF32_R_SYM (rel->r_info); + if (r_symndx >= symtab_hdr->sh_info) + { + 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; + } + + switch (ELF32_R_TYPE (rel->r_info)) + { + case R_LM32_16_GOT: + if (h != NULL) + { + if (h->got.refcount > 0) + h->got.refcount--; + } + else + { + if (local_got_refcounts && local_got_refcounts[r_symndx] > 0) + local_got_refcounts[r_symndx]--; + } + break; + + default: + break; + } + } + return TRUE; +} + +/* Look through the relocs for a section during the first phase. */ + +static bfd_boolean +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, **sym_hashes_end; + const Elf_Internal_Rela *rel; + const Elf_Internal_Rela *rel_end; + struct elf_lm32_link_hash_table *htab; + bfd *dynobj; + bfd_vma *local_got_offsets; + asection *sgot, *srelgot, *sreloc; + + if (info->relocatable) + return TRUE; + + sgot = srelgot = sreloc = NULL; + + symtab_hdr = &elf_tdata (abfd)->symtab_hdr; + sym_hashes = elf_sym_hashes (abfd); + sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym); + if (!elf_bad_symtab (abfd)) + sym_hashes_end -= symtab_hdr->sh_info; + + htab = lm32_elf_hash_table (info); + dynobj = htab->root.dynobj; + local_got_offsets = elf_local_got_offsets (abfd); + + 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->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 (! 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 (! create_got_section (dynobj, info)) + return FALSE; + /* Create .rofixup section */ + if (htab->sfixup32 == NULL) + { + if (! create_rofixup_section (abfd, 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 (! create_rofixup_section (abfd, 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 bfd_boolean +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); + dynobj = htab->root.dynobj; + + sgot = htab->sgotplt; + sdyn = bfd_get_section_by_name (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; + const char *name; + asection *s; + + bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); + + switch (dyn.d_tag) + { + default: + break; + + case DT_PLTGOT: + name = ".got"; + s = htab->sgot->output_section; + goto get_vma; + case DT_JMPREL: + name = ".rela.plt"; + s = htab->srelplt->output_section; + get_vma: + BFD_ASSERT (s != NULL); + dyn.d_un.d_ptr = s->vma; + bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); + break; + + case DT_PLTRELSZ: + s = htab->srelplt->output_section; + BFD_ASSERT (s != NULL); + dyn.d_un.d_val = s->size; + bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); + break; + + case DT_RELASZ: + /* My reading of the SVR4 ABI indicates that the + procedure linkage table relocs (DT_JMPREL) should be + included in the overall relocs (DT_RELA). This is + what Solaris does. However, UnixWare can not handle + that case. Therefore, we override the DT_RELASZ entry + here to make it not include the JMPREL relocs. Since + the linker script arranges for .rela.plt to follow all + other relocation sections, we don't have to worry + about changing the DT_RELA entry. */ + if (htab->srelplt != NULL) + { + s = htab->srelplt->output_section; + 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->splt; + if (splt && splt->size > 0) + { + if (info->shared) + { + 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 %d != relocs %d", + 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)) + { + 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: %ld != %ld", hend->u.def.value, value); + return FALSE; + } + } + } + + return TRUE; +} + +/* Finish up dynamic symbol handling. We set the contents of various + dynamic sections here. */ + +static bfd_boolean +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 *dynobj; + bfd_byte *loc; + + htab = lm32_elf_hash_table (info); + dynobj = htab->root.dynobj; + + 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->splt; + sgot = htab->sgotplt; + srela = htab->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 (! info->shared) + { + /* 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->sgot; + srela = htab->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 (info->shared + && (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_section_by_name (h->root.u.def.section->owner, + ".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 (strcmp (h->root.root.string, "_DYNAMIC") == 0 + || h == htab->root.hgot) + sym->st_shndx = SHN_ABS; + + return TRUE; +} + +static enum elf_reloc_type_class +lm32_elf_reloc_type_class (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 bfd_boolean +lm32_elf_adjust_dynamic_symbol (struct bfd_link_info *info, + struct elf_link_hash_entry *h) +{ + struct elf_lm32_link_hash_table *htab; + struct elf_lm32_link_hash_entry *eh; + struct elf_lm32_dyn_relocs *p; + 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->u.weakdef != NULL + || (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 (! info->shared + && !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->u.weakdef != NULL) + { + BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined + || h->u.weakdef->root.type == bfd_link_hash_defweak); + h->root.u.def.section = h->u.weakdef->root.u.def.section; + h->root.u.def.value = h->u.weakdef->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 (info->shared) + 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 (info->nocopyreloc) + { + h->non_got_ref = 0; + return TRUE; + } + + eh = (struct elf_lm32_link_hash_entry *) h; + for (p = eh->dyn_relocs; p != NULL; p = p->next) + { + s = p->sec->output_section; + if (s != NULL && (s->flags & (SEC_READONLY | SEC_HAS_CONTENTS)) != 0) + break; + } + + /* If we didn't find any dynamic relocs in sections which needs the + copy reloc, then we'll be keeping the dynamic relocs and avoiding + the copy reloc. */ + if (p == NULL) + { + h->non_got_ref = 0; + return TRUE; + } + + if (h->size == 0) + { + (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"), + h->root.root.string); + 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); + 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) + { + 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 (h, s); +} + +/* Allocate space in .plt, .got and associated reloc sections for + dynamic relocs. */ + +static bfd_boolean +allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) +{ + struct bfd_link_info *info; + struct elf_lm32_link_hash_table *htab; + struct elf_lm32_link_hash_entry *eh; + struct elf_lm32_dyn_relocs *p; + + if (h->root.type == bfd_link_hash_indirect) + return TRUE; + + if (h->root.type == bfd_link_hash_warning) + /* When warning symbols are created, they **replace** the "real" + entry in the hash table, thus we never get to see the real + symbol in a hash traversal. So look at it now. */ + h = (struct elf_link_hash_entry *) h->root.u.i.link; + + info = (struct bfd_link_info *) inf; + htab = lm32_elf_hash_table (info); + + eh = (struct elf_lm32_link_hash_entry *) h; + + 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, info->shared, h)) + { + asection *s = htab->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 (! info->shared + && !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->sgotplt->size += 4; + + /* We also need to make an entry in the .rel.plt section. */ + htab->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; + bfd_boolean 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->sgot; + + h->got.offset = s->size; + s->size += 4; + dyn = htab->root.dynamic_sections_created; + if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)) + htab->srelgot->size += sizeof (Elf32_External_Rela); + } + else + h->got.offset = (bfd_vma) -1; + + if (eh->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 (info->shared) + { + if (h->def_regular + && (h->forced_local + || info->symbolic)) + { + struct elf_lm32_dyn_relocs **pp; + + for (pp = &eh->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 (eh->dyn_relocs != NULL + && h->root.type == bfd_link_hash_undefweak) + { + if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) + eh->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; + } + + eh->dyn_relocs = NULL; + + keep: ; + } + + /* Finally, allocate space. */ + for (p = eh->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; +} + +/* Find any dynamic relocs that apply to read-only sections. */ + +static bfd_boolean +readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf) +{ + struct elf_lm32_link_hash_entry *eh; + struct elf_lm32_dyn_relocs *p; + + if (h->root.type == bfd_link_hash_warning) + h = (struct elf_link_hash_entry *) h->root.u.i.link; + + eh = (struct elf_lm32_link_hash_entry *) h; + for (p = eh->dyn_relocs; p != NULL; p = p->next) + { + asection *s = p->sec->output_section; + + if (s != NULL && (s->flags & SEC_READONLY) != 0) + { + struct bfd_link_info *info = (struct bfd_link_info *) inf; + + info->flags |= DF_TEXTREL; + + /* Not an error, just cut short the traversal. */ + return FALSE; + } + } + return TRUE; +} + +/* Set the sizes of the dynamic sections. */ + +static bfd_boolean +lm32_elf_size_dynamic_sections (bfd *output_bfd, + struct bfd_link_info *info) +{ + struct elf_lm32_link_hash_table *htab; + bfd *dynobj; + asection *s; + bfd_boolean relocs; + bfd *ibfd; + + htab = lm32_elf_hash_table (info); + 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 (info->executable) + { + s = bfd_get_section_by_name (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_lm32_dyn_relocs *p; + + for (p = ((struct elf_lm32_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->sgot; + srel = htab->srelgot; + for (; local_got < end_local_got; ++local_got) + { + if (*local_got > 0) + { + *local_got = s->size; + s->size += 4; + if (info->shared) + 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->splt + || s == htab->sgot + || s == htab->sgotplt + || s == htab->sdynbss) + { + /* Strip this section if we don't need it; see the + comment below. */ + } + else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) + { + if (s->size != 0 && s != htab->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 (htab->root.dynamic_sections_created) + { + /* Add some entries to the .dynamic section. We fill in the + values later, in lm32_elf_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. */ +#define add_dynamic_entry(TAG, VAL) \ + _bfd_elf_add_dynamic_entry (info, TAG, VAL) + + if (info->executable) + { + if (! add_dynamic_entry (DT_DEBUG, 0)) + return FALSE; + } + + if (htab->splt->size != 0) + { + if (! add_dynamic_entry (DT_PLTGOT, 0) + || ! add_dynamic_entry (DT_PLTRELSZ, 0) + || ! add_dynamic_entry (DT_PLTREL, DT_RELA) + || ! add_dynamic_entry (DT_JMPREL, 0)) + return FALSE; + } + + if (relocs) + { + if (! add_dynamic_entry (DT_RELA, 0) + || ! add_dynamic_entry (DT_RELASZ, 0) + || ! add_dynamic_entry (DT_RELAENT, + sizeof (Elf32_External_Rela))) + return FALSE; + + /* If any dynamic relocs apply to a read-only section, + then we need a DT_TEXTREL entry. */ + if ((info->flags & DF_TEXTREL) == 0) + elf_link_hash_traverse (&htab->root, readonly_dynrelocs, + info); + + if ((info->flags & DF_TEXTREL) != 0) + { + if (! add_dynamic_entry (DT_TEXTREL, 0)) + return FALSE; + } + } + } +#undef add_dynamic_entry + + /* 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 (!elf_discarded_section (s) && !((bfd_get_section_flags (ibfd, 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 && !elf_discarded_section (s) && (bfd_get_section_flags (ibfd, 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->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 bfd_boolean +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); + + /* Make sure we have a GOT - For the case where we have a dynamic object + but none of the relocs in check_relocs */ + if (! 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_with_flags (abfd, ".plt", pltflags); + htab->splt = s; + if (s == NULL + || ! bfd_set_section_alignment (abfd, 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 (info->shared + && ! bfd_elf_link_record_dynamic_symbol (info, h)) + return FALSE; + } + + s = bfd_make_section_with_flags (abfd, + bed->default_use_rela_p ? ".rela.plt" : ".rel.plt", + flags | SEC_READONLY); + htab->srelplt = s; + if (s == NULL + || ! bfd_set_section_alignment (abfd, s, ptralign)) + return FALSE; + + if (htab->sgot == NULL + && ! create_got_section (abfd, info)) + return FALSE; + + { + const char *secname; + char *relname; + flagword secflags; + asection *sec; + + for (sec = abfd->sections; sec; sec = sec->next) + { + secflags = bfd_get_section_flags (abfd, sec); + if ((secflags & (SEC_DATA | SEC_LINKER_CREATED)) + || ((secflags & SEC_HAS_CONTENTS) != SEC_HAS_CONTENTS)) + continue; + secname = bfd_get_section_name (abfd, sec); + relname = bfd_malloc ((bfd_size_type) strlen (secname) + 6); + strcpy (relname, ".rela"); + strcat (relname, secname); + if (bfd_get_section_by_name (abfd, secname)) + continue; + s = bfd_make_section_with_flags (abfd, relname, + flags | SEC_READONLY); + if (s == NULL + || ! bfd_set_section_alignment (abfd, s, ptralign)) + 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_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 (! info->shared) + { + s = bfd_make_section_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 (abfd, s, ptralign)) + return FALSE; + } + } + + return TRUE; +} + +/* Copy the extra info we tack onto an elf_link_hash_entry. */ + +static void +lm32_elf_copy_indirect_symbol (struct bfd_link_info *info, + struct elf_link_hash_entry *dir, + struct elf_link_hash_entry *ind) +{ + struct elf_lm32_link_hash_entry * edir; + struct elf_lm32_link_hash_entry * eind; + + edir = (struct elf_lm32_link_hash_entry *) dir; + eind = (struct elf_lm32_link_hash_entry *) ind; + + if (eind->dyn_relocs != NULL) + { + if (edir->dyn_relocs != NULL) + { + struct elf_lm32_dyn_relocs **pp; + struct elf_lm32_dyn_relocs *p; + + /* Add reloc counts against the indirect sym to the direct sym + list. Merge any entries against the same section. */ + for (pp = &eind->dyn_relocs; (p = *pp) != NULL;) + { + struct elf_lm32_dyn_relocs *q; + + for (q = edir->dyn_relocs; q != NULL; q = q->next) + if (q->sec == p->sec) + { + q->pc_count += p->pc_count; + q->count += p->count; + *pp = p->next; + break; + } + if (q == NULL) + pp = &p->next; + } + *pp = edir->dyn_relocs; + } + + edir->dyn_relocs = eind->dyn_relocs; + eind->dyn_relocs = NULL; + } + + _bfd_elf_link_hash_copy_indirect (info, dir, ind); +} + +static bfd_boolean +lm32_elf_always_size_sections (bfd *output_bfd, + struct bfd_link_info *info) +{ + if (!info->relocatable) + { + struct elf_link_hash_entry *h; + + /* Force a PT_GNU_STACK segment to be created. */ + if (! elf_tdata (output_bfd)->stack_flags) + elf_tdata (output_bfd)->stack_flags = PF_R | PF_W | PF_X; + + /* Define __stacksize if it's not defined yet. */ + h = elf_link_hash_lookup (elf_hash_table (info), "__stacksize", + FALSE, FALSE, FALSE); + if (! h || h->root.type != bfd_link_hash_defined + || h->type != STT_OBJECT + || !h->def_regular) + { + struct bfd_link_hash_entry *bh = NULL; + + if (!(_bfd_generic_link_add_one_symbol + (info, output_bfd, "__stacksize", + BSF_GLOBAL, bfd_abs_section_ptr, DEFAULT_STACK_SIZE, + (const char *) NULL, FALSE, + get_elf_backend_data (output_bfd)->collect, &bh))) + return FALSE; + + h = (struct elf_link_hash_entry *) bh; + h->def_regular = 1; + h->type = STT_OBJECT; + /* This one must NOT be hidden. */ + } + } + + return TRUE; +} + +static bfd_boolean +lm32_elf_modify_segment_map (bfd *output_bfd, + struct bfd_link_info *info) +{ + struct elf_segment_map *m; + + /* objcopy and strip preserve what's already there using elf32_lm32fdpic_copy_ + private_bfd_data (). */ + if (! info) + return TRUE; + + for (m = elf_tdata (output_bfd)->segment_map; m != NULL; m = m->next) + if (m->p_type == PT_GNU_STACK) + break; + + if (m) + { + asection *sec = bfd_get_section_by_name (output_bfd, ".stack"); + struct elf_link_hash_entry *h; + + if (sec) + { + /* Obtain the pointer to the __stacksize symbol. */ + h = elf_link_hash_lookup (elf_hash_table (info), "__stacksize", + FALSE, FALSE, FALSE); + 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; + BFD_ASSERT (h->root.type == bfd_link_hash_defined); + + /* Set the section size from the symbol value. We + intentionally ignore the symbol section. */ + if (h->root.type == bfd_link_hash_defined) + sec->size = h->root.u.def.value; + else + sec->size = DEFAULT_STACK_SIZE; + + /* Add the stack section to the PT_GNU_STACK segment, + such that its size and alignment requirements make it + to the segment. */ + m->sections[m->count] = sec; + m->count++; + } + } + + return TRUE; +} + +static bfd_boolean +lm32_elf_modify_program_headers (bfd *output_bfd, + struct bfd_link_info *info) +{ + struct elf_obj_tdata *tdata = elf_tdata (output_bfd); + struct elf_segment_map *m; + Elf_Internal_Phdr *p; + + if (! info) + return TRUE; + + for (p = tdata->phdr, m = tdata->segment_map; m != NULL; m = m->next, p++) + if (m->p_type == PT_GNU_STACK) + break; + + if (m) + { + struct elf_link_hash_entry *h; + + /* Obtain the pointer to the __stacksize symbol. */ + h = elf_link_hash_lookup (elf_hash_table (info), "__stacksize", + FALSE, FALSE, FALSE); + if (h) + { + 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; + BFD_ASSERT (h->root.type == bfd_link_hash_defined); + } + + /* Set the header p_memsz from the symbol value. We + intentionally ignore the symbol section. */ + if (h && h->root.type == bfd_link_hash_defined) + p->p_memsz = h->root.u.def.value; + else + p->p_memsz = DEFAULT_STACK_SIZE; + + p->p_align = 8; + } + + return TRUE; +} + + +static bfd_boolean +lm32_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd) +{ + if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour + || bfd_get_flavour (obfd) != bfd_target_elf_flavour) + return TRUE; + + BFD_ASSERT (!elf_flags_init (obfd) + || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags); + + elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags; + elf_flags_init (obfd) = TRUE; + + /* Copy object attributes. */ + _bfd_elf_copy_obj_attributes (ibfd, obfd); + + return TRUE; +} + + +static bfd_boolean +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 (! lm32_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_MACHINE_CODE EM_LATTICEMICO32 +#define ELF_MAXPAGESIZE 0x1000 + +#define TARGET_BIG_SYM bfd_elf32_lm32_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 0 +#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_can_gc_sections 1 +#define elf_backend_can_refcount 1 +#define elf_backend_gc_mark_hook lm32_elf_gc_mark_hook +#define elf_backend_gc_sweep_hook lm32_elf_gc_sweep_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 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_copy_indirect_symbol lm32_elf_copy_indirect_symbol +#define elf_backend_size_dynamic_sections lm32_elf_size_dynamic_sections +#define elf_backend_omit_section_dynsym ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true) +#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 bfd_elf32_lm32fdpic_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 elf_backend_modify_segment_map +#define elf_backend_modify_segment_map lm32_elf_modify_segment_map +#undef elf_backend_modify_program_headers +#define elf_backend_modify_program_headers lm32_elf_modify_program_headers +#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" |