binutils-gdb/bfd/merge.c
Alan Modra d42c267e9b bfd_error_handler bfd_vma and bfd_size_type args
This patch uses the new %L _bfd_error_handler support for printing
bfd_vma arguments, and fixes a many other format and/or argument
errors in error messages.

bfd/
	* binary.c (binary_set_section_contents): Don't print filepos in
	error message.
	(coff_write_object_contents): Cast size_t for error message.
	(coff_slurp_line_table): Don't use bfd_vma symndx.
	(coff_slurp_reloc_table): Remove unneeded cast.
	* dwarf2.c (read_section): Cast bfd_int64_t to long long for
	error message.
	(find_abstract_instance_name): Likewise.
	* elf32-arm.c (arm_type_of_stub): Correct error arg order.
	(bfd_elf32_arm_stm32l4xx_erratum_scan): Don't cast error arg.
	(elf32_arm_check_relocs): Make r_symndx an int.
	* elf32-cris.c (cris_elf_check_relocs): Delete extraneous %s in
	format string.
	* elf32-metag.c (elf_metag_relocate_section): Delete extra error
	message arg.
	* elf32-nds32.c (nds32_elf_ex9_build_hash_table): Rewrite bogus
	error message.
	* elf32-i386.c (elf_i386_check_relocs): Make r_symndx an int.
	* elf32-s390.c (elf_s390_check_relocs): Likewise.
	* elf32-tic6x.c (elf32_tic6x_check_relocs): Likewise.
	* elf32-tilepro.c (tilepro_elf_check_relocs): Likewise.
	* elf32-xtensa.c (elf_xtensa_check_relocs): Likewise.
	* elf64-s390.c (elf_s390_check_relocs): Likewise.
	* elf64-x86-64.c (elf_x86_64_check_relocs): Likewise.
	* elfnn-aarch64.c (elfNN_aarch64_check_relocs): Likewise.
	* elfnn-riscv.c (riscv_elf_check_relocs): Likewise.
	* elfxx-sparc.c (_bfd_sparc_elf_check_relocs): Likewise.
	* elfxx-tilegx.c (tilegx_elf_check_relocs): Likewise.
	* elf64-mmix.c (_bfd_mmix_after_linker_allocation): Cast size_t args
	and use %lu for error message.
	* elflink.c (elf_link_adjust_relocs): Delete extra error message arg.
	* mmo.c (mmo_scan): Make stab_loc a file_ptr.  Cast expression for
	error message.

	* elf32-arm.c (elf32_arm_tls_relax): Correct format string and args
	in error message.
	(elf32_arm_final_link_relocate): Likewise.
	* coff-arm.c (bfd_arm_process_before_allocation): Likewise.
	* coffcode.h (styp_to_sec_flags): Likewise.
	* cofflink.c (_bfd_coff_write_global_sym): Likewise.
	* ecoff.c (_bfd_ecoff_slurp_symbol_table): Likewise.
	* elf32-arc.c (arc_elf_merge_private_bfd_data): Likewise.
	* elf32-bfin.c (bfinfdpic_check_relocs): Likewise.
	(elf32_bfin_merge_private_bfd_data): Likewise.
	* elf32-cris.c (cris_elf_relocate_section): Likewise.
	* elf32-frv.c (frv_elf_merge_private_bfd_data): Likewise.
	* elf32-i370.c (i370_elf_merge_private_bfd_data): Likewise.
	(i370_elf_relocate_section): Likewise.
	* elf32-iq2000.c (iq2000_elf_merge_private_bfd_data): Likewise.
	* elf32-m32c.c (m32c_elf_merge_private_bfd_data): Likewise.
	* elf32-m68hc1x.c (_bfd_m68hc11_elf_merge_private_bfd_data): Likewise.
	* elf32-mcore.c (mcore_elf_relocate_section): Likewise.
	* elf32-mep.c (mep_elf_merge_private_bfd_data): Likewise.
	* elf32-mt.c (mt_elf_merge_private_bfd_data): Likewise.
	* elf64-sparc.c (elf64_sparc_merge_private_bfd_data): Likewise.
	* elfxx-mips.c (mips_elf_merge_obj_e_flags): Likewise.
	(_bfd_mips_elf_merge_private_bfd_data): Likewise.
	* ieee.c (ieee_write_id, read_id): Likewise.
	* mach-o.c (bfd_mach_o_write_contents): Likewise.
	(bfd_mach_o_layout_commands, bfd_mach_o_read_section_32): Likewise.
	(bfd_mach_o_read_section_64, bfd_mach_o_read_symtab_symbol): Likewise.
	(bfd_mach_o_read_command, bfd_mach_o_header_p): Likewise.
	* peXXigen.c (_bfd_XXi_swap_aouthdr_in): Likewise.
	* stabs.c (_bfd_link_section_stabs): Likewise.

	* coff-arm.c (coff_arm_relocate_section): Use L modifier in error
	format.
	* coff-mcore.c (coff_mcore_relocate_section): Likewise.
	* coff-ppc.c (coff_ppc_relocate_section): Likewise.
	* coff-rs6000.c (xcoff_reloc_type_toc): Likewise.
	* coff-sh.c (sh_relax_section): Likewise.
	(sh_relax_delete_bytes, sh_swap_insns): Likewise.
	* coff-tic80.c (coff_tic80_relocate_section): Likewise.
	* coffcode.h (coff_slurp_reloc_table): Likewise.
	* coffgen.c (_bfd_coff_get_external_symbols): Likewise.
	(_bfd_coff_read_string_table): Likewise.
	* cofflink.c (_bfd_coff_generic_relocate_section): Likewise.
	* compress.c (bfd_get_full_section_contents): Likewise.
	* dwarf2.c (read_formatted_entries, decode_line_info): Likewise.
	* elf-m10300.c (mn10300_elf_relocate_section): Likewise.
	* elf.c (bfd_elf_string_from_elf_section): Likewise.
	* elf32-arc.c (arc_special_overflow_checks): Likewise.
	* elf32-arm.c (elf32_arm_tls_relax): Likewise.
	(elf32_arm_final_link_relocate, elf32_arm_relocate_section): Likewise.
	(elf32_arm_write_section): Likewise.
	* elf32-bfin.c (bfin_relocate_section): Likewise.
	(bfinfdpic_relocate_section): Likewise.
	* elf32-hppa.c (hppa_build_one_stub): Likewise.
	(final_link_relocate, elf32_hppa_relocate_section): Likewise.
	* elf32-i386.c (elf_i386_tls_transition): Likewise.
	(elf_i386_relocate_section): Likewise.
	* elf32-ip2k.c (ip2k_final_link_relocate): Likewise.
	* elf32-lm32.c (lm32_elf_finish_dynamic_sections): Likewise.
	* elf32-m32r.c (m32r_elf_relocate_section): Likewise.
	* elf32-m68k.c (elf_m68k_relocate_section): Likewise.
	* elf32-metag.c (elf_metag_relocate_section): Likewise.
	* elf32-nds32.c (unrecognized_reloc_msg): Likewise.
	(nds32_elf_relax_longcall1, nds32_elf_relax_longcall2): Likewise.
	(nds32_elf_relax_longcall3, nds32_elf_relax_longjump1): Likewise.
	(nds32_elf_relax_longjump2, nds32_elf_relax_longjump3): Likewise.
	(nds32_elf_relax_longcall4, nds32_elf_relax_longcall5): Likewise.
	(nds32_elf_relax_longcall6, nds32_elf_relax_longjump4): Likewise.
	(nds32_elf_relax_longjump5, nds32_elf_relax_longjump6): Likewise.
	(nds32_elf_relax_longjump7, nds32_elf_relax_loadstore): Likewise.
	(nds32_elf_relax_ptr, nds32_elf_ex9_build_hash_table): Likewise.
	* elf32-nios2.c (nios2_elf32_relocate_section): Likewise.
	* elf32-rx.c (UNSAFE_FOR_PID): Likewise.
	* elf32-s390.c (invalid_tls_insn, elf_s390_relocate_section): Likewise.
	* elf32-score.c (s3_bfd_score_elf_check_relocs): Likewise.
	* elf32-score7.c (s7_bfd_score_elf_check_relocs): Likewise.
	* elf32-sh.c (sh_elf_relax_section): Likewise.
	(sh_elf_relax_delete_bytes, sh_elf_swap_insns): Likewise.
	(sh_elf_relocate_section): Likewise.
	* elf32-sh64.c (shmedia_prepare_reloc): Likewise.
	* elf32-spu.c (spu_elf_relocate_section): Likewise.
	* elf32-tic6x.c (elf32_tic6x_relocate_section): Likewise.
	* elf32-tilepro.c (tilepro_elf_relocate_section): Likewise.
	* elf32-v850.c (v850_elf_relax_section): Likewise.
	* elf32-vax.c (elf_vax_check_relocs): Likewise.
	(elf_vax_relocate_section): Likewise.
	* elf32-xtensa.c (elf_xtensa_relocate_section): Likewise.
	(extend_ebb_bounds_forward, extend_ebb_bounds_backward): Likewise.
	(compute_text_actions, compute_ebb_proposed_actions): Likewise.
	(do_fix_for_relocatable_link): Likewise.
	* elf64-alpha.c (elf64_alpha_relax_got_load): Likewise.
	(elf64_alpha_relax_with_lituse): Likewise.
	* elf64-hppa.c (elf64_hppa_finish_dynamic_symbol): Likewise.
	(elf_hppa_final_link_relocate): Likewise.
	* elf64-ia64-vms.c (elf64_ia64_relax_section): Likewise.
	(elf64_ia64_choose_gp, elf64_ia64_relocate_section): Likewise.
	(elf64_vms_link_add_object_symbols): Likewise.
	* elf64-mmix.c (mmix_elf_perform_relocation): Likewise.
	(mmix_final_link_relocate): Likewise.
	* elf64-s390.c (invalid_tls_insn): Likewise.
	(elf_s390_relocate_section): Likewise.
	* elf64-sh64.c (sh_elf64_relocate_section): Likewise.
	* elf64-x86-64.c (elf_x86_64_tls_transition): Likewise.
	(elf_x86_64_relocate_section): Likewise.
	* elfcode.h (elf_slurp_symbol_table): Likewise.
	* elfcore.h (elf_core_file_p): Likewise.
	* elflink.c (elf_link_read_relocs_from_section): Likewise.
	* elfnn-aarch64.c (elfNN_aarch64_final_link_relocate): Likewise.
	(elfNN_aarch64_relocate_section): Likewise.
	* elfnn-ia64.c (elfNN_ia64_relax_section): Likewise.
	(elfNN_ia64_choose_gp, elfNN_ia64_relocate_section): Likewise.
	* elfnn-riscv.c (riscv_elf_relocate_section): Likewise.
	* elfxx-mips.c (_bfd_mips_elf_check_relocs): Likewise.
	(_bfd_mips_elf_relocate_section): Likewise.
	(_bfd_mips_elf_finish_dynamic_symbol, mips_finish_exec_plt): Likewise.
	* elfxx-sparc.c (_bfd_sparc_elf_relocate_section): Likewise.
	* elfxx-tilegx.c (tilegx_elf_relocate_section): Likewise.
	* ieee.c (ieee_slurp_external_symbols): Likewise.
	* ihex.c (ihex_write_object_content): Likewise.
	* mach-o.c (bfd_mach_o_build_exec_seg_command): Likewise.
	* merge.c (_bfd_merged_section_offset): Likewise.
	* mmo.c (mmo_write_loc_chunk): Likewise.
	(mmo_write_object_contents): Likewise.
	* peXXigen.c (_bfd_XX_bfd_copy_private_bfd_data_common): Likewise.
	* stabs.c (_bfd_link_section_stabs): Likewise.
	* xcofflink.c (xcoff_link_add_symbols, xcoff_find_tc0): Likewise.
ld/
	* testsuite/ld-arc/nps-1b.err: Update.
	* testsuite/ld-x86-64/ilp32-11.d: Update.
2017-07-12 14:03:48 +09:30

933 lines
23 KiB
C

/* SEC_MERGE support.
Copyright (C) 2001-2017 Free Software Foundation, Inc.
Written by Jakub Jelinek <jakub@redhat.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. */
/* This file contains support for merging duplicate entities within sections,
as used in ELF SHF_MERGE. */
#include "sysdep.h"
#include "bfd.h"
#include "elf-bfd.h"
#include "libbfd.h"
#include "hashtab.h"
#include "libiberty.h"
struct sec_merge_sec_info;
/* An entry in the section merge hash table. */
struct sec_merge_hash_entry
{
struct bfd_hash_entry root;
/* Length of this entry. This includes the zero terminator. */
unsigned int len;
/* Start of this string needs to be aligned to
alignment octets (not 1 << align). */
unsigned int alignment;
union
{
/* Index within the merged section. */
bfd_size_type index;
/* Entry this is a suffix of (if alignment is 0). */
struct sec_merge_hash_entry *suffix;
} u;
/* Which section is it in. */
struct sec_merge_sec_info *secinfo;
/* Next entity in the hash table. */
struct sec_merge_hash_entry *next;
};
/* The section merge hash table. */
struct sec_merge_hash
{
struct bfd_hash_table table;
/* Next available index. */
bfd_size_type size;
/* First entity in the SEC_MERGE sections of this type. */
struct sec_merge_hash_entry *first;
/* Last entity in the SEC_MERGE sections of this type. */
struct sec_merge_hash_entry *last;
/* Entity size. */
unsigned int entsize;
/* Are entries fixed size or zero terminated strings? */
bfd_boolean strings;
};
struct sec_merge_info
{
/* Chain of sec_merge_infos. */
struct sec_merge_info *next;
/* Chain of sec_merge_sec_infos. */
struct sec_merge_sec_info *chain;
/* A hash table used to hold section content. */
struct sec_merge_hash *htab;
};
struct sec_merge_sec_info
{
/* Chain of sec_merge_sec_infos. */
struct sec_merge_sec_info *next;
/* The corresponding section. */
asection *sec;
/* Pointer to merge_info pointing to us. */
void **psecinfo;
/* A hash table used to hold section content. */
struct sec_merge_hash *htab;
/* First string in this section. */
struct sec_merge_hash_entry *first_str;
/* Original section content. */
unsigned char contents[1];
};
/* Routine to create an entry in a section merge hashtab. */
static struct bfd_hash_entry *
sec_merge_hash_newfunc (struct bfd_hash_entry *entry,
struct bfd_hash_table *table, const char *string)
{
/* Allocate the structure if it has not already been allocated by a
subclass. */
if (entry == NULL)
entry = (struct bfd_hash_entry *)
bfd_hash_allocate (table, sizeof (struct sec_merge_hash_entry));
if (entry == NULL)
return NULL;
/* Call the allocation method of the superclass. */
entry = bfd_hash_newfunc (entry, table, string);
if (entry != NULL)
{
/* Initialize the local fields. */
struct sec_merge_hash_entry *ret = (struct sec_merge_hash_entry *) entry;
ret->u.suffix = NULL;
ret->alignment = 0;
ret->secinfo = NULL;
ret->next = NULL;
}
return entry;
}
/* Look up an entry in a section merge hash table. */
static struct sec_merge_hash_entry *
sec_merge_hash_lookup (struct sec_merge_hash *table, const char *string,
unsigned int alignment, bfd_boolean create)
{
const unsigned char *s;
unsigned long hash;
unsigned int c;
struct sec_merge_hash_entry *hashp;
unsigned int len, i;
unsigned int _index;
hash = 0;
len = 0;
s = (const unsigned char *) string;
if (table->strings)
{
if (table->entsize == 1)
{
while ((c = *s++) != '\0')
{
hash += c + (c << 17);
hash ^= hash >> 2;
++len;
}
hash += len + (len << 17);
}
else
{
for (;;)
{
for (i = 0; i < table->entsize; ++i)
if (s[i] != '\0')
break;
if (i == table->entsize)
break;
for (i = 0; i < table->entsize; ++i)
{
c = *s++;
hash += c + (c << 17);
hash ^= hash >> 2;
}
++len;
}
hash += len + (len << 17);
len *= table->entsize;
}
hash ^= hash >> 2;
len += table->entsize;
}
else
{
for (i = 0; i < table->entsize; ++i)
{
c = *s++;
hash += c + (c << 17);
hash ^= hash >> 2;
}
len = table->entsize;
}
_index = hash % table->table.size;
for (hashp = (struct sec_merge_hash_entry *) table->table.table[_index];
hashp != NULL;
hashp = (struct sec_merge_hash_entry *) hashp->root.next)
{
if (hashp->root.hash == hash
&& len == hashp->len
&& memcmp (hashp->root.string, string, len) == 0)
{
/* If the string we found does not have at least the required
alignment, we need to insert another copy. */
if (hashp->alignment < alignment)
{
if (create)
{
/* Mark the less aligned copy as deleted. */
hashp->len = 0;
hashp->alignment = 0;
}
break;
}
return hashp;
}
}
if (! create)
return NULL;
hashp = ((struct sec_merge_hash_entry *)
bfd_hash_insert (&table->table, string, hash));
if (hashp == NULL)
return NULL;
hashp->len = len;
hashp->alignment = alignment;
return hashp;
}
/* Create a new hash table. */
static struct sec_merge_hash *
sec_merge_init (unsigned int entsize, bfd_boolean strings)
{
struct sec_merge_hash *table;
table = (struct sec_merge_hash *) bfd_malloc (sizeof (struct sec_merge_hash));
if (table == NULL)
return NULL;
if (! bfd_hash_table_init_n (&table->table, sec_merge_hash_newfunc,
sizeof (struct sec_merge_hash_entry), 16699))
{
free (table);
return NULL;
}
table->size = 0;
table->first = NULL;
table->last = NULL;
table->entsize = entsize;
table->strings = strings;
return table;
}
/* Get the index of an entity in a hash table, adding it if it is not
already present. */
static struct sec_merge_hash_entry *
sec_merge_add (struct sec_merge_hash *tab, const char *str,
unsigned int alignment, struct sec_merge_sec_info *secinfo)
{
struct sec_merge_hash_entry *entry;
entry = sec_merge_hash_lookup (tab, str, alignment, TRUE);
if (entry == NULL)
return NULL;
if (entry->secinfo == NULL)
{
tab->size++;
entry->secinfo = secinfo;
if (tab->first == NULL)
tab->first = entry;
else
tab->last->next = entry;
tab->last = entry;
}
return entry;
}
static bfd_boolean
sec_merge_emit (bfd *abfd, struct sec_merge_hash_entry *entry,
unsigned char *contents, file_ptr offset)
{
struct sec_merge_sec_info *secinfo = entry->secinfo;
asection *sec = secinfo->sec;
char *pad = NULL;
bfd_size_type off = 0;
int alignment_power = sec->output_section->alignment_power;
if (alignment_power)
{
pad = (char *) bfd_zmalloc ((bfd_size_type) 1 << alignment_power);
if (pad == NULL)
return FALSE;
}
for (; entry != NULL && entry->secinfo == secinfo; entry = entry->next)
{
const char *str;
bfd_size_type len;
len = -off & (entry->alignment - 1);
if (len != 0)
{
if (contents)
{
memcpy (contents + offset, pad, len);
offset += len;
}
else if (bfd_bwrite (pad, len, abfd) != len)
goto err;
off += len;
}
str = entry->root.string;
len = entry->len;
if (contents)
{
memcpy (contents + offset, str, len);
offset += len;
}
else if (bfd_bwrite (str, len, abfd) != len)
goto err;
off += len;
}
/* Trailing alignment needed? */
off = sec->size - off;
if (off != 0)
{
if (contents)
memcpy (contents + offset, pad, off);
else if (bfd_bwrite (pad, off, abfd) != off)
goto err;
}
if (pad != NULL)
free (pad);
return TRUE;
err:
if (pad != NULL)
free (pad);
return FALSE;
}
/* Register a SEC_MERGE section as a candidate for merging.
This function is called for all non-dynamic SEC_MERGE input sections. */
bfd_boolean
_bfd_add_merge_section (bfd *abfd, void **psinfo, asection *sec,
void **psecinfo)
{
struct sec_merge_info *sinfo;
struct sec_merge_sec_info *secinfo;
unsigned int align;
bfd_size_type amt;
bfd_byte *contents;
if ((abfd->flags & DYNAMIC) != 0
|| (sec->flags & SEC_MERGE) == 0)
abort ();
if (sec->size == 0
|| (sec->flags & SEC_EXCLUDE) != 0
|| sec->entsize == 0)
return TRUE;
if ((sec->flags & SEC_RELOC) != 0)
{
/* We aren't prepared to handle relocations in merged sections. */
return TRUE;
}
align = sec->alignment_power;
if ((sec->entsize < (unsigned) 1 << align
&& ((sec->entsize & (sec->entsize - 1))
|| !(sec->flags & SEC_STRINGS)))
|| (sec->entsize > (unsigned) 1 << align
&& (sec->entsize & (((unsigned) 1 << align) - 1))))
{
/* Sanity check. If string character size is smaller than
alignment, then we require character size to be a power
of 2, otherwise character size must be integer multiple
of alignment. For non-string constants, alignment must
be smaller than or equal to entity size and entity size
must be integer multiple of alignment. */
return TRUE;
}
for (sinfo = (struct sec_merge_info *) *psinfo; sinfo; sinfo = sinfo->next)
if ((secinfo = sinfo->chain)
&& ! ((secinfo->sec->flags ^ sec->flags) & (SEC_MERGE | SEC_STRINGS))
&& secinfo->sec->entsize == sec->entsize
&& secinfo->sec->alignment_power == sec->alignment_power
&& secinfo->sec->output_section == sec->output_section)
break;
if (sinfo == NULL)
{
/* Initialize the information we need to keep track of. */
sinfo = (struct sec_merge_info *)
bfd_alloc (abfd, sizeof (struct sec_merge_info));
if (sinfo == NULL)
goto error_return;
sinfo->next = (struct sec_merge_info *) *psinfo;
sinfo->chain = NULL;
*psinfo = sinfo;
sinfo->htab = sec_merge_init (sec->entsize, (sec->flags & SEC_STRINGS));
if (sinfo->htab == NULL)
goto error_return;
}
/* Read the section from abfd. */
amt = sizeof (struct sec_merge_sec_info) - 1 + sec->size;
if (sec->flags & SEC_STRINGS)
/* Some versions of gcc may emit a string without a zero terminator.
See http://gcc.gnu.org/ml/gcc-patches/2006-06/msg01004.html
Allocate space for an extra zero. */
amt += sec->entsize;
*psecinfo = bfd_alloc (abfd, amt);
if (*psecinfo == NULL)
goto error_return;
secinfo = (struct sec_merge_sec_info *) *psecinfo;
if (sinfo->chain)
{
secinfo->next = sinfo->chain->next;
sinfo->chain->next = secinfo;
}
else
secinfo->next = secinfo;
sinfo->chain = secinfo;
secinfo->sec = sec;
secinfo->psecinfo = psecinfo;
secinfo->htab = sinfo->htab;
secinfo->first_str = NULL;
sec->rawsize = sec->size;
if (sec->flags & SEC_STRINGS)
memset (secinfo->contents + sec->size, 0, sec->entsize);
contents = secinfo->contents;
if (! bfd_get_full_section_contents (sec->owner, sec, &contents))
goto error_return;
return TRUE;
error_return:
*psecinfo = NULL;
return FALSE;
}
/* Record one section into the hash table. */
static bfd_boolean
record_section (struct sec_merge_info *sinfo,
struct sec_merge_sec_info *secinfo)
{
asection *sec = secinfo->sec;
struct sec_merge_hash_entry *entry;
bfd_boolean nul;
unsigned char *p, *end;
bfd_vma mask, eltalign;
unsigned int align, i;
align = sec->alignment_power;
end = secinfo->contents + sec->size;
nul = FALSE;
mask = ((bfd_vma) 1 << align) - 1;
if (sec->flags & SEC_STRINGS)
{
for (p = secinfo->contents; p < end; )
{
eltalign = p - secinfo->contents;
eltalign = ((eltalign ^ (eltalign - 1)) + 1) >> 1;
if (!eltalign || eltalign > mask)
eltalign = mask + 1;
entry = sec_merge_add (sinfo->htab, (char *) p, (unsigned) eltalign,
secinfo);
if (! entry)
goto error_return;
p += entry->len;
if (sec->entsize == 1)
{
while (p < end && *p == 0)
{
if (!nul && !((p - secinfo->contents) & mask))
{
nul = TRUE;
entry = sec_merge_add (sinfo->htab, "",
(unsigned) mask + 1, secinfo);
if (! entry)
goto error_return;
}
p++;
}
}
else
{
while (p < end)
{
for (i = 0; i < sec->entsize; i++)
if (p[i] != '\0')
break;
if (i != sec->entsize)
break;
if (!nul && !((p - secinfo->contents) & mask))
{
nul = TRUE;
entry = sec_merge_add (sinfo->htab, (char *) p,
(unsigned) mask + 1, secinfo);
if (! entry)
goto error_return;
}
p += sec->entsize;
}
}
}
}
else
{
for (p = secinfo->contents; p < end; p += sec->entsize)
{
entry = sec_merge_add (sinfo->htab, (char *) p, 1, secinfo);
if (! entry)
goto error_return;
}
}
return TRUE;
error_return:
for (secinfo = sinfo->chain; secinfo; secinfo = secinfo->next)
*secinfo->psecinfo = NULL;
return FALSE;
}
static int
strrevcmp (const void *a, const void *b)
{
struct sec_merge_hash_entry *A = *(struct sec_merge_hash_entry **) a;
struct sec_merge_hash_entry *B = *(struct sec_merge_hash_entry **) b;
unsigned int lenA = A->len;
unsigned int lenB = B->len;
const unsigned char *s = (const unsigned char *) A->root.string + lenA - 1;
const unsigned char *t = (const unsigned char *) B->root.string + lenB - 1;
int l = lenA < lenB ? lenA : lenB;
while (l)
{
if (*s != *t)
return (int) *s - (int) *t;
s--;
t--;
l--;
}
return lenA - lenB;
}
/* Like strrevcmp, but for the case where all strings have the same
alignment > entsize. */
static int
strrevcmp_align (const void *a, const void *b)
{
struct sec_merge_hash_entry *A = *(struct sec_merge_hash_entry **) a;
struct sec_merge_hash_entry *B = *(struct sec_merge_hash_entry **) b;
unsigned int lenA = A->len;
unsigned int lenB = B->len;
const unsigned char *s = (const unsigned char *) A->root.string + lenA - 1;
const unsigned char *t = (const unsigned char *) B->root.string + lenB - 1;
int l = lenA < lenB ? lenA : lenB;
int tail_align = (lenA & (A->alignment - 1)) - (lenB & (A->alignment - 1));
if (tail_align != 0)
return tail_align;
while (l)
{
if (*s != *t)
return (int) *s - (int) *t;
s--;
t--;
l--;
}
return lenA - lenB;
}
static inline int
is_suffix (const struct sec_merge_hash_entry *A,
const struct sec_merge_hash_entry *B)
{
if (A->len <= B->len)
/* B cannot be a suffix of A unless A is equal to B, which is guaranteed
not to be equal by the hash table. */
return 0;
return memcmp (A->root.string + (A->len - B->len),
B->root.string, B->len) == 0;
}
/* This is a helper function for _bfd_merge_sections. It attempts to
merge strings matching suffixes of longer strings. */
static void
merge_strings (struct sec_merge_info *sinfo)
{
struct sec_merge_hash_entry **array, **a, *e;
struct sec_merge_sec_info *secinfo;
bfd_size_type size, amt;
unsigned int alignment = 0;
/* Now sort the strings */
amt = sinfo->htab->size * sizeof (struct sec_merge_hash_entry *);
array = (struct sec_merge_hash_entry **) bfd_malloc (amt);
if (array == NULL)
goto alloc_failure;
for (e = sinfo->htab->first, a = array; e; e = e->next)
if (e->alignment)
{
*a++ = e;
/* Adjust the length to not include the zero terminator. */
e->len -= sinfo->htab->entsize;
if (alignment != e->alignment)
{
if (alignment == 0)
alignment = e->alignment;
else
alignment = (unsigned) -1;
}
}
sinfo->htab->size = a - array;
if (sinfo->htab->size != 0)
{
qsort (array, (size_t) sinfo->htab->size,
sizeof (struct sec_merge_hash_entry *),
(alignment != (unsigned) -1 && alignment > sinfo->htab->entsize
? strrevcmp_align : strrevcmp));
/* Loop over the sorted array and merge suffixes */
e = *--a;
e->len += sinfo->htab->entsize;
while (--a >= array)
{
struct sec_merge_hash_entry *cmp = *a;
cmp->len += sinfo->htab->entsize;
if (e->alignment >= cmp->alignment
&& !((e->len - cmp->len) & (cmp->alignment - 1))
&& is_suffix (e, cmp))
{
cmp->u.suffix = e;
cmp->alignment = 0;
}
else
e = cmp;
}
}
alloc_failure:
if (array)
free (array);
/* Now assign positions to the strings we want to keep. */
size = 0;
secinfo = sinfo->htab->first->secinfo;
for (e = sinfo->htab->first; e; e = e->next)
{
if (e->secinfo != secinfo)
{
secinfo->sec->size = size;
secinfo = e->secinfo;
}
if (e->alignment)
{
if (e->secinfo->first_str == NULL)
{
e->secinfo->first_str = e;
size = 0;
}
size = (size + e->alignment - 1) & ~((bfd_vma) e->alignment - 1);
e->u.index = size;
size += e->len;
}
}
secinfo->sec->size = size;
if (secinfo->sec->alignment_power != 0)
{
bfd_size_type align = (bfd_size_type) 1 << secinfo->sec->alignment_power;
secinfo->sec->size = (secinfo->sec->size + align - 1) & -align;
}
/* And now adjust the rest, removing them from the chain (but not hashtable)
at the same time. */
for (a = &sinfo->htab->first, e = *a; e; e = e->next)
if (e->alignment)
a = &e->next;
else
{
*a = e->next;
if (e->len)
{
e->secinfo = e->u.suffix->secinfo;
e->alignment = e->u.suffix->alignment;
e->u.index = e->u.suffix->u.index + (e->u.suffix->len - e->len);
}
}
}
/* This function is called once after all SEC_MERGE sections are registered
with _bfd_merge_section. */
bfd_boolean
_bfd_merge_sections (bfd *abfd,
struct bfd_link_info *info ATTRIBUTE_UNUSED,
void *xsinfo,
void (*remove_hook) (bfd *, asection *))
{
struct sec_merge_info *sinfo;
for (sinfo = (struct sec_merge_info *) xsinfo; sinfo; sinfo = sinfo->next)
{
struct sec_merge_sec_info * secinfo;
if (! sinfo->chain)
continue;
/* Move sinfo->chain to head of the chain, terminate it. */
secinfo = sinfo->chain;
sinfo->chain = secinfo->next;
secinfo->next = NULL;
/* Record the sections into the hash table. */
for (secinfo = sinfo->chain; secinfo; secinfo = secinfo->next)
if (secinfo->sec->flags & SEC_EXCLUDE)
{
*secinfo->psecinfo = NULL;
if (remove_hook)
(*remove_hook) (abfd, secinfo->sec);
}
else if (! record_section (sinfo, secinfo))
break;
if (secinfo)
continue;
if (sinfo->htab->first == NULL)
continue;
if (sinfo->htab->strings)
merge_strings (sinfo);
else
{
struct sec_merge_hash_entry *e;
bfd_size_type size = 0;
/* Things are much simpler for non-strings.
Just assign them slots in the section. */
secinfo = NULL;
for (e = sinfo->htab->first; e; e = e->next)
{
if (e->secinfo->first_str == NULL)
{
if (secinfo)
secinfo->sec->size = size;
e->secinfo->first_str = e;
size = 0;
}
size = (size + e->alignment - 1)
& ~((bfd_vma) e->alignment - 1);
e->u.index = size;
size += e->len;
secinfo = e->secinfo;
}
secinfo->sec->size = size;
}
/* Finally remove all input sections which have not made it into
the hash table at all. */
for (secinfo = sinfo->chain; secinfo; secinfo = secinfo->next)
if (secinfo->first_str == NULL)
secinfo->sec->flags |= SEC_EXCLUDE | SEC_KEEP;
}
return TRUE;
}
/* Write out the merged section. */
bfd_boolean
_bfd_write_merged_section (bfd *output_bfd, asection *sec, void *psecinfo)
{
struct sec_merge_sec_info *secinfo;
file_ptr pos;
unsigned char *contents;
Elf_Internal_Shdr *hdr;
secinfo = (struct sec_merge_sec_info *) psecinfo;
if (!secinfo)
return FALSE;
if (secinfo->first_str == NULL)
return TRUE;
/* FIXME: octets_per_byte. */
hdr = &elf_section_data (sec->output_section)->this_hdr;
if (hdr->sh_offset == (file_ptr) -1)
{
/* We must compress this section. Write output to the
buffer. */
contents = hdr->contents;
if ((sec->output_section->flags & SEC_ELF_COMPRESS) == 0
|| contents == NULL)
abort ();
}
else
{
contents = NULL;
pos = sec->output_section->filepos + sec->output_offset;
if (bfd_seek (output_bfd, pos, SEEK_SET) != 0)
return FALSE;
}
if (! sec_merge_emit (output_bfd, secinfo->first_str, contents,
sec->output_offset))
return FALSE;
return TRUE;
}
/* Adjust an address in the SEC_MERGE section. Given OFFSET within
*PSEC, this returns the new offset in the adjusted SEC_MERGE
section and writes the new section back into *PSEC. */
bfd_vma
_bfd_merged_section_offset (bfd *output_bfd ATTRIBUTE_UNUSED, asection **psec,
void *psecinfo, bfd_vma offset)
{
struct sec_merge_sec_info *secinfo;
struct sec_merge_hash_entry *entry;
unsigned char *p;
asection *sec = *psec;
secinfo = (struct sec_merge_sec_info *) psecinfo;
if (!secinfo)
return offset;
if (offset >= sec->rawsize)
{
if (offset > sec->rawsize)
_bfd_error_handler
/* xgettext:c-format */
(_("%B: access beyond end of merged section (%Ld)"),
sec->owner, offset);
return secinfo->first_str ? sec->size : 0;
}
if (secinfo->htab->strings)
{
if (sec->entsize == 1)
{
p = secinfo->contents + offset - 1;
while (p >= secinfo->contents && *p)
--p;
++p;
}
else
{
p = secinfo->contents + (offset / sec->entsize) * sec->entsize;
p -= sec->entsize;
while (p >= secinfo->contents)
{
unsigned int i;
for (i = 0; i < sec->entsize; ++i)
if (p[i] != '\0')
break;
if (i == sec->entsize)
break;
p -= sec->entsize;
}
p += sec->entsize;
}
}
else
{
p = secinfo->contents + (offset / sec->entsize) * sec->entsize;
}
entry = sec_merge_hash_lookup (secinfo->htab, (char *) p, 0, FALSE);
if (!entry)
{
if (! secinfo->htab->strings)
abort ();
/* This should only happen if somebody points into the padding
after a NUL character but before next entity. */
if (*p)
abort ();
if (! secinfo->htab->first)
abort ();
entry = secinfo->htab->first;
p = (secinfo->contents + (offset / sec->entsize + 1) * sec->entsize
- entry->len);
}
*psec = entry->secinfo->sec;
return entry->u.index + (secinfo->contents + offset - p);
}
/* Tidy up when done. */
void
_bfd_merge_sections_free (void *xsinfo)
{
struct sec_merge_info *sinfo;
for (sinfo = (struct sec_merge_info *) xsinfo; sinfo; sinfo = sinfo->next)
{
bfd_hash_table_free (&sinfo->htab->table);
free (sinfo->htab);
}
}