diff options
Diffstat (limited to 'bfd')
| -rw-r--r-- | bfd/ChangeLog | 20 | ||||
| -rw-r--r-- | bfd/elf-bfd.h | 7 | ||||
| -rw-r--r-- | bfd/elf-eh-frame.c | 271 |
3 files changed, 134 insertions, 164 deletions
diff --git a/bfd/ChangeLog b/bfd/ChangeLog index 24b3c41..623eefa 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -1,3 +1,19 @@ +2004-10-10 Alan Modra <amodra@bigpond.net.au> + + * elf-bfd.h (struct eh_cie_fde): Add cie_inf, remove sec. + (struct eh_frame_hdr_info): Add last_cie_inf, remove last_cie_offset. + * elf-eh-frame.c (_bfd_elf_discard_section_eh_frame): Delete code + setting offsets for removed CIEs. Don't set "sec", instead set + cie_inf for FDEs. Keep a pointer to last struct eh_cie_fde for a + CIE in hdr_info. Only set make_relative and make_lsda_relative + for CIEs. Use pointers rather than array indices. + (_bfd_elf_eh_frame_section_offset): Test/set make_relative, + make_lsda_relative, need_* on cie_inf for FDEs. + (_bfd_elf_write_section_eh_frame): Adjust offset and new_offset for + section output_offset. Delete cie_offset, instead use cie_inf + pointer to CIE entry. Use need_relative and need_lsda_relative on + CIE entry for FDEs. Use pointers rather than array indices. + 2004-10-09 Alan Modra <amodra@bigpond.net.au> * coff-rs6000.c (rs6000coff_vec): Add initializer for @@ -167,7 +183,7 @@ literals. Pass is_abs_literal flag to init_source_reloc. (is_resolvable_asm_expansion): Use bfd_get_section_limit. Check for CONST16 instructions. Adjust calls to r_reloc_init and - pcrel_reloc_fits. Handle weak symbols conservatively. + pcrel_reloc_fits. Handle weak symbols conservatively. (find_associated_l32r_irel): Add bfd parameter and pass it to is_l32r_relocation. (compute_text_actions, compute_ebb_proposed_actions, @@ -180,7 +196,7 @@ Call xtensa_read_table_entries to get the property table. Skip relocations other than R_XTENSA_32 and R_XTENSA_PLT. Use new is_removable_literal, remove_dead_literal, and - identify_literal_placement functions. + identify_literal_placement functions. (get_irel_at_offset): Rewrite to use bsearch on sorted relocations instead of linear search. (is_removable_literal, remove_dead_literal, diff --git a/bfd/elf-bfd.h b/bfd/elf-bfd.h index bfee05d..f9b1b4a 100644 --- a/bfd/elf-bfd.h +++ b/bfd/elf-bfd.h @@ -286,9 +286,10 @@ struct cie struct eh_cie_fde { - unsigned int offset; + /* For FDEs, this points to the CIE used. */ + struct eh_cie_fde *cie_inf; unsigned int size; - asection *sec; + unsigned int offset; unsigned int new_offset; unsigned char fde_encoding; unsigned char lsda_encoding; @@ -319,8 +320,8 @@ struct eh_frame_hdr_info { struct cie last_cie; asection *last_cie_sec; + struct eh_cie_fde *last_cie_inf; asection *hdr_sec; - unsigned int last_cie_offset; unsigned int fde_count, array_count; struct eh_frame_array_ent *array; /* TRUE if .eh_frame_hdr should contain the sorted search table. diff --git a/bfd/elf-eh-frame.c b/bfd/elf-eh-frame.c index 12eef61..9bc5ea4 100644 --- a/bfd/elf-eh-frame.c +++ b/bfd/elf-eh-frame.c @@ -213,14 +213,14 @@ _bfd_elf_discard_section_eh_frame { bfd_byte *ehbuf = NULL, *buf; bfd_byte *last_cie, *last_fde; + struct eh_cie_fde *ent, *last_cie_inf, *this_inf; struct cie_header hdr; struct cie cie; struct elf_link_hash_table *htab; struct eh_frame_hdr_info *hdr_info; struct eh_frame_sec_info *sec_info = NULL; unsigned int leb128_tmp; - unsigned int cie_usage_count, last_cie_ndx, i, offset; - unsigned int make_relative, make_lsda_relative; + unsigned int cie_usage_count, offset; bfd_size_type new_size; unsigned int ptr_size; @@ -264,12 +264,10 @@ _bfd_elf_discard_section_eh_frame == ELFCLASS64) ? 8 : 4; buf = ehbuf; last_cie = NULL; - last_cie_ndx = 0; + last_cie_inf = NULL; memset (&cie, 0, sizeof (cie)); cie_usage_count = 0; new_size = sec->size; - make_relative = hdr_info->last_cie.make_relative; - make_lsda_relative = hdr_info->last_cie.make_lsda_relative; sec_info = bfd_zmalloc (sizeof (struct eh_frame_sec_info) + 99 * sizeof (struct eh_cie_fde)); if (sec_info == NULL) @@ -302,18 +300,25 @@ _bfd_elf_discard_section_eh_frame if (sec_info->count == sec_info->alloced) { + struct eh_cie_fde *old_entry = sec_info->entry; sec_info = bfd_realloc (sec_info, sizeof (struct eh_frame_sec_info) - + (sec_info->alloced + 99) - * sizeof (struct eh_cie_fde)); + + ((sec_info->alloced + 99) + * sizeof (struct eh_cie_fde))); if (sec_info == NULL) goto free_no_table; memset (&sec_info->entry[sec_info->alloced], 0, 100 * sizeof (struct eh_cie_fde)); sec_info->alloced += 100; + + /* Now fix any pointers into the array. */ + if (last_cie_inf >= old_entry + && last_cie_inf < old_entry + sec_info->count) + last_cie_inf = sec_info->entry + (last_cie_inf - old_entry); } + this_inf = sec_info->entry + sec_info->count; last_fde = buf; /* If we are at the end of the section, we still need to decide on whether to output or discard last encountered CIE (if any). */ @@ -334,8 +339,8 @@ _bfd_elf_discard_section_eh_frame /* CIE/FDE not contained fully in this .eh_frame input section. */ goto free_no_table; - sec_info->entry[sec_info->count].offset = last_fde - ehbuf; - sec_info->entry[sec_info->count].size = 4 + hdr.length; + this_inf->offset = last_fde - ehbuf; + this_inf->size = 4 + hdr.length; if (hdr.length == 0) { @@ -376,21 +381,15 @@ _bfd_elf_discard_section_eh_frame || cie_usage_count == 0) { new_size -= cie.hdr.length + 4; - sec_info->entry[last_cie_ndx].removed = 1; - sec_info->entry[last_cie_ndx].sec = hdr_info->last_cie_sec; - sec_info->entry[last_cie_ndx].new_offset - = hdr_info->last_cie_offset; + last_cie_inf->removed = 1; } else { hdr_info->last_cie = cie; hdr_info->last_cie_sec = sec; - hdr_info->last_cie_offset = last_cie - ehbuf; - sec_info->entry[last_cie_ndx].make_relative - = cie.make_relative; - sec_info->entry[last_cie_ndx].make_lsda_relative - = cie.make_lsda_relative; - sec_info->entry[last_cie_ndx].per_encoding_relative + last_cie_inf->make_relative = cie.make_relative; + last_cie_inf->make_lsda_relative = cie.make_lsda_relative; + last_cie_inf->per_encoding_relative = (cie.per_encoding & 0x70) == DW_EH_PE_pcrel; } } @@ -398,8 +397,8 @@ _bfd_elf_discard_section_eh_frame if (hdr.id == (unsigned int) -1) break; - last_cie_ndx = sec_info->count; - sec_info->entry[sec_info->count].cie = 1; + last_cie_inf = this_inf; + this_inf->cie = 1; cie_usage_count = 0; memset (&cie, 0, sizeof (cie)); @@ -552,12 +551,13 @@ _bfd_elf_discard_section_eh_frame if (GET_RELOC (buf) == NULL) /* This should not happen. */ goto free_no_table; + if ((*reloc_symbol_deleted_p) (buf - ehbuf, cookie)) { /* This is a FDE against a discarded section. It should be deleted. */ new_size -= hdr.length + 4; - sec_info->entry[sec_info->count].removed = 1; + this_inf->removed = 1; } else { @@ -585,14 +585,14 @@ _bfd_elf_discard_section_eh_frame read_uleb128 (dummy, buf); /* If some new augmentation data is added before LSDA in FDE augmentation area, this need to be adjusted. */ - sec_info->entry[sec_info->count].lsda_offset = (buf - aug); + this_inf->lsda_offset = (buf - aug); } buf = last_fde + 4 + hdr.length; SKIP_RELOCS (buf); } - sec_info->entry[sec_info->count].fde_encoding = cie.fde_encoding; - sec_info->entry[sec_info->count].lsda_encoding = cie.lsda_encoding; + this_inf->fde_encoding = cie.fde_encoding; + this_inf->lsda_encoding = cie.lsda_encoding; sec_info->count++; } @@ -601,41 +601,18 @@ _bfd_elf_discard_section_eh_frame /* Ok, now we can assign new offsets. */ offset = 0; - last_cie_ndx = 0; - for (i = 0; i < sec_info->count; i++) - { - if (! sec_info->entry[i].removed) - { - sec_info->entry[i].new_offset = offset; - offset += sec_info->entry[i].size; - if (sec_info->entry[i].cie) - { - last_cie_ndx = i; - make_relative = sec_info->entry[i].make_relative; - make_lsda_relative = sec_info->entry[i].make_lsda_relative; - } - else - { - sec_info->entry[i].make_relative = make_relative; - sec_info->entry[i].make_lsda_relative = make_lsda_relative; - sec_info->entry[i].per_encoding_relative = 0; - } - } - else if (sec_info->entry[i].cie && sec_info->entry[i].sec == sec) - { - /* Need to adjust new_offset too. */ - BFD_ASSERT (sec_info->entry[last_cie_ndx].offset - == sec_info->entry[i].new_offset); - sec_info->entry[i].new_offset - = sec_info->entry[last_cie_ndx].new_offset; - } - } - if (hdr_info->last_cie_sec == sec) - { - BFD_ASSERT (sec_info->entry[last_cie_ndx].offset - == hdr_info->last_cie_offset); - hdr_info->last_cie_offset = sec_info->entry[last_cie_ndx].new_offset; - } + last_cie_inf = hdr_info->last_cie_inf; + for (ent = sec_info->entry; ent < sec_info->entry + sec_info->count; ++ent) + if (!ent->removed) + { + ent->new_offset = offset; + offset += ent->size; + if (ent->cie) + last_cie_inf = ent; + else + ent->cie_inf = last_cie_inf; + } + hdr_info->last_cie_inf = last_cie_inf; /* Shrink the sec as needed. */ sec->rawsize = sec->size; @@ -772,22 +749,22 @@ _bfd_elf_eh_frame_section_offset (bfd *output_bfd ATTRIBUTE_UNUSED, /* If converting to DW_EH_PE_pcrel, there will be no need for run-time relocation against FDE's initial_location field. */ - if (sec_info->entry[mid].make_relative - && ! sec_info->entry[mid].cie + if (!sec_info->entry[mid].cie + && sec_info->entry[mid].cie_inf->make_relative && offset == sec_info->entry[mid].offset + 8) { - sec_info->entry[mid].need_relative = 1; + sec_info->entry[mid].cie_inf->need_relative = 1; return (bfd_vma) -2; } /* If converting LSDA pointers to DW_EH_PE_pcrel, there will be no need for run-time relocation against LSDA field. */ - if (sec_info->entry[mid].make_lsda_relative - && ! sec_info->entry[mid].cie + if (!sec_info->entry[mid].cie + && sec_info->entry[mid].cie_inf->make_lsda_relative && (offset == (sec_info->entry[mid].offset + 8 + sec_info->entry[mid].lsda_offset))) { - sec_info->entry[mid].need_lsda_relative = 1; + sec_info->entry[mid].cie_inf->need_lsda_relative = 1; return (bfd_vma) -2; } @@ -807,11 +784,10 @@ _bfd_elf_write_section_eh_frame (bfd *abfd, struct eh_frame_sec_info *sec_info; struct elf_link_hash_table *htab; struct eh_frame_hdr_info *hdr_info; - unsigned int i; bfd_byte *p, *buf; unsigned int leb128_tmp; - unsigned int cie_offset = 0; unsigned int ptr_size; + struct eh_cie_fde *ent; ptr_size = (elf_elfheader (sec->owner)->e_ident[EI_CLASS] == ELFCLASS64) ? 8 : 4; @@ -829,36 +805,27 @@ _bfd_elf_write_section_eh_frame (bfd *abfd, hdr_info = NULL; p = contents; - for (i = 0; i < sec_info->count; ++i) + for (ent = sec_info->entry; ent < sec_info->entry + sec_info->count; ++ent) { - if (sec_info->entry[i].removed) - { - if (sec_info->entry[i].cie) - { - /* If CIE is removed due to no remaining FDEs referencing it - and there were no CIEs kept before it, sec_info->entry[i].sec - will be zero. */ - if (sec_info->entry[i].sec == NULL) - cie_offset = 0; - else - { - cie_offset = sec_info->entry[i].new_offset; - cie_offset += (sec_info->entry[i].sec->output_section->vma - + sec_info->entry[i].sec->output_offset - - sec->output_section->vma - - sec->output_offset); - } - } - continue; - } - - if (sec_info->entry[i].cie) + if (ent->removed) + continue; + + /* First convert all offsets to output section offsets, so that a + CIE offset is valid if the CIE is used by a FDE from some other + section. This can happen when duplicate CIEs are deleted in + _bfd_elf_discard_section_eh_frame. + FIXME: This assumes that _bfd_elf_discard_section_eh_frame is + called on sections in the same order as this function, which + isn't necessarily so. */ + ent->offset += sec->output_offset; + ent->new_offset += sec->output_offset; + + if (ent->cie) { /* CIE */ - cie_offset = sec_info->entry[i].new_offset; - if (sec_info->entry[i].need_relative - || sec_info->entry[i].need_lsda_relative - || sec_info->entry[i].per_encoding_relative) + if (ent->need_relative + || ent->need_lsda_relative + || ent->per_encoding_relative) { unsigned char *aug; unsigned int action; @@ -866,10 +833,10 @@ _bfd_elf_write_section_eh_frame (bfd *abfd, /* Need to find 'R' or 'L' augmentation's argument and modify DW_EH_PE_* value. */ - action = (sec_info->entry[i].need_relative ? 1 : 0) - | (sec_info->entry[i].need_lsda_relative ? 2 : 0) - | (sec_info->entry[i].per_encoding_relative ? 4 : 0); - buf = contents + sec_info->entry[i].offset; + action = ((ent->need_relative ? 1 : 0) + | (ent->need_lsda_relative ? 2 : 0) + | (ent->per_encoding_relative ? 4 : 0)); + buf = contents + ent->offset - sec->output_offset; /* Skip length, id and version. */ buf += 9; aug = buf; @@ -889,7 +856,7 @@ _bfd_elf_write_section_eh_frame (bfd *abfd, case 'L': if (action & 2) { - BFD_ASSERT (*buf == sec_info->entry[i].lsda_encoding); + BFD_ASSERT (*buf == ent->lsda_encoding); *buf |= DW_EH_PE_pcrel; action &= ~2; } @@ -897,25 +864,22 @@ _bfd_elf_write_section_eh_frame (bfd *abfd, break; case 'P': per_encoding = *buf++; - per_width = get_DW_EH_PE_width (per_encoding, - ptr_size); + per_width = get_DW_EH_PE_width (per_encoding, ptr_size); BFD_ASSERT (per_width != 0); BFD_ASSERT (((per_encoding & 0x70) == DW_EH_PE_pcrel) - == sec_info->entry[i].per_encoding_relative); + == ent->per_encoding_relative); if ((per_encoding & 0xf0) == DW_EH_PE_aligned) buf = (contents + ((buf - contents + per_width - 1) & ~((bfd_size_type) per_width - 1))); if (action & 4) { - bfd_vma value; - - value = read_value (abfd, buf, per_width, - get_DW_EH_PE_signed - (per_encoding)); - value += (sec_info->entry[i].offset - - sec_info->entry[i].new_offset); - write_value (abfd, buf, value, per_width); + bfd_vma val; + + val = read_value (abfd, buf, per_width, + get_DW_EH_PE_signed (per_encoding)); + val += ent->offset - ent->new_offset; + write_value (abfd, buf, val, per_width); action &= ~4; } buf += per_width; @@ -923,7 +887,7 @@ _bfd_elf_write_section_eh_frame (bfd *abfd, case 'R': if (action & 1) { - BFD_ASSERT (*buf == sec_info->entry[i].fde_encoding); + BFD_ASSERT (*buf == ent->fde_encoding); *buf |= DW_EH_PE_pcrel; action &= ~1; } @@ -934,26 +898,25 @@ _bfd_elf_write_section_eh_frame (bfd *abfd, } } } - else if (sec_info->entry[i].size > 4) + else if (ent->size > 4) { /* FDE */ - bfd_vma value = 0, address; + bfd_vma value, address; unsigned int width; - buf = contents + sec_info->entry[i].offset; + buf = contents + ent->offset - sec->output_offset; /* Skip length. */ buf += 4; - bfd_put_32 (abfd, - sec_info->entry[i].new_offset + 4 - cie_offset, buf); + value = ent->new_offset + 4 - ent->cie_inf->new_offset; + bfd_put_32 (abfd, value, buf); buf += 4; - width = get_DW_EH_PE_width (sec_info->entry[i].fde_encoding, - ptr_size); - address = value = read_value (abfd, buf, width, - get_DW_EH_PE_signed - (sec_info->entry[i].fde_encoding)); + width = get_DW_EH_PE_width (ent->fde_encoding, ptr_size); + value = read_value (abfd, buf, width, + get_DW_EH_PE_signed (ent->fde_encoding)); + address = value; if (value) { - switch (sec_info->entry[i].fde_encoding & 0xf0) + switch (ent->fde_encoding & 0xf0) { case DW_EH_PE_indirect: case DW_EH_PE_textrel: @@ -968,15 +931,12 @@ _bfd_elf_write_section_eh_frame (bfd *abfd, } break; case DW_EH_PE_pcrel: - value += (sec_info->entry[i].offset - - sec_info->entry[i].new_offset); - address += (sec->output_section->vma + sec->output_offset - + sec_info->entry[i].offset + 8); + value += ent->offset - ent->new_offset; + address += sec->output_section->vma + ent->offset + 8; break; } - if (sec_info->entry[i].need_relative) - value -= (sec->output_section->vma + sec->output_offset - + sec_info->entry[i].new_offset + 8); + if (ent->cie_inf->need_relative) + value -= sec->output_section->vma + ent->new_offset + 8; write_value (abfd, buf, value, width); } @@ -984,41 +944,34 @@ _bfd_elf_write_section_eh_frame (bfd *abfd, { hdr_info->array[hdr_info->array_count].initial_loc = address; hdr_info->array[hdr_info->array_count++].fde - = (sec->output_section->vma + sec->output_offset - + sec_info->entry[i].new_offset); + = sec->output_section->vma + ent->new_offset; } - if ((sec_info->entry[i].lsda_encoding & 0xf0) == DW_EH_PE_pcrel - || sec_info->entry[i].need_lsda_relative) + if ((ent->lsda_encoding & 0xf0) == DW_EH_PE_pcrel + || ent->cie_inf->need_lsda_relative) { - buf += sec_info->entry[i].lsda_offset; - width = get_DW_EH_PE_width (sec_info->entry[i].lsda_encoding, - ptr_size); + buf += ent->lsda_offset; + width = get_DW_EH_PE_width (ent->lsda_encoding, ptr_size); value = read_value (abfd, buf, width, - get_DW_EH_PE_signed - (sec_info->entry[i].lsda_encoding)); + get_DW_EH_PE_signed (ent->lsda_encoding)); if (value) { - if ((sec_info->entry[i].lsda_encoding & 0xf0) - == DW_EH_PE_pcrel) - value += (sec_info->entry[i].offset - - sec_info->entry[i].new_offset); - else if (sec_info->entry[i].need_lsda_relative) - value -= (sec->output_section->vma + sec->output_offset - + sec_info->entry[i].new_offset + 8 - + sec_info->entry[i].lsda_offset); + if ((ent->lsda_encoding & 0xf0) == DW_EH_PE_pcrel) + value += ent->offset - ent->new_offset; + else if (ent->cie_inf->need_lsda_relative) + value -= (sec->output_section->vma + ent->new_offset + 8 + + ent->lsda_offset); write_value (abfd, buf, value, width); } } } else /* Terminating FDE must be at the end of .eh_frame section only. */ - BFD_ASSERT (i == sec_info->count - 1); + BFD_ASSERT (ent == sec_info->entry + sec_info->count - 1); - BFD_ASSERT (p == contents + sec_info->entry[i].new_offset); - memmove (p, contents + sec_info->entry[i].offset, - sec_info->entry[i].size); - p += sec_info->entry[i].size; + BFD_ASSERT (p == contents + ent->new_offset - sec->output_offset); + memmove (p, contents + ent->offset - sec->output_offset, ent->size); + p += ent->size; } { @@ -1032,22 +985,22 @@ _bfd_elf_write_section_eh_frame (bfd *abfd, <= sec->output_section->size)) { /* Find the last CIE/FDE. */ - for (i = sec_info->count - 1; i > 0; i--) - if (! sec_info->entry[i].removed) + ent = sec_info->entry + sec_info->count; + while (--ent != sec_info->entry) + if (!ent->removed) break; /* The size of the last CIE/FDE must be at least 4. */ - if (sec_info->entry[i].removed - || sec_info->entry[i].size < 4) + if (ent->removed || ent->size < 4) abort (); pad = alignment - pad; - buf = contents + sec_info->entry[i].new_offset; + buf = contents + ent->new_offset - sec->output_offset; /* Update length. */ - sec_info->entry[i].size += pad; - bfd_put_32 (abfd, sec_info->entry[i].size - 4, buf); + ent->size += pad; + bfd_put_32 (abfd, ent->size - 4, buf); /* Pad it with DW_CFA_nop */ memset (p, 0, pad); |