e41b3a1379
include/
* bfdlink.h (struct bfd_link_info): Add no_ld_generated_unwind_info
option.
ld/
* emultempl/elf32.em (OPTION_LD_GENERATED_UNWIND_INFO,
OPTION_NO_LD_GENERATED_UNWIND_INFO): Define.
(gld${EMULATION_NAME}_handle_option): Handle
--ld-generated-unwind-info and --no-ld-generated-unwind-info.
* ld.texinfo (--ld-generated-unwind-info,
--no-ld-generated-unwind-info): Document.
bfd/
* elf-eh-frame.c (_bfd_elf_parse_eh_frame): Allow no relocations
at all for linker created .eh_frame sections.
(_bfd_elf_discard_section_eh_frame): Handle linker created
.eh_frame sections with no relocations.
* elf64-x86-64.c: Include dwarf2.h.
(elf_x86_64_eh_frame_plt): New variable.
(PLT_CIE_LENGTH, PLT_FDE_LENGTH, PLT_FDE_START_OFFSET,
PLT_FDE_LEN_OFFSET): Define.
(struct elf_x86_64_link_hash_table): Add plt_eh_frame field.
(elf_x86_64_create_dynamic_sections): Create and fill in
.eh_frame section for .plt section.
(elf_x86_64_size_dynamic_sections): Write .plt section size
into .eh_frame FDE covering .plt section.
(elf_x86_64_finish_dynamic_sections): Write .plt section
start into .eh_frame FDE covering .plt section. Call
_bfd_elf_write_section_eh_frame on htab->plt_eh_frame section.
(elf_backend_plt_alignment): Define to 4.
* elf32-i386.c: Include dwarf2.h.
(elf_i386_eh_frame_plt): New variable.
(PLT_CIE_LENGTH, PLT_FDE_LENGTH, PLT_FDE_START_OFFSET,
PLT_FDE_LEN_OFFSET): Define.
(struct elf_i386_link_hash_table): Add plt_eh_frame field.
(elf_i386_create_dynamic_sections): Create and fill in
.eh_frame section for .plt section.
(elf_i386_size_dynamic_sections): Write .plt section size
into .eh_frame FDE covering .plt section.
(elf_i386_finish_dynamic_sections): Write .plt section
start into .eh_frame FDE covering .plt section. Call
_bfd_elf_write_section_eh_frame on htab->plt_eh_frame section.
(elf_backend_plt_alignment): Define to 4.
ld/testsuite/
* ld-x86-64/x86-64.exp: Link some testcases with
--no-ld-generated-unwind-info.
* ld-x86-64/tlsbin.rd: Add --no-ld-generated-unwind-info to ld
comment.
* ld-x86-64/tlsdesc.dd: Likewise.
* ld-x86-64/tlspic.dd: Likewise.
* ld-x86-64/tlsdesc.sd: Likewise.
* ld-x86-64/tlspic.rd: Likewise.
* ld-x86-64/tlsbindesc.rd: Likewise.
* ld-x86-64/tlsbindesc.sd: Likewise.
* ld-x86-64/tlsbin.td: Likewise.
* ld-x86-64/tlsdesc.pd: Likewise.
* ld-x86-64/tlsdesc.td: Likewise.
* ld-x86-64/tlsbindesc.dd: Likewise.
* ld-x86-64/tlsbin.dd: Likewise.
* ld-x86-64/tlsgdesc.rd: Likewise.
* ld-x86-64/tlspic.sd: Likewise.
* ld-x86-64/tlsbindesc.td: Likewise.
* ld-x86-64/tlspic.td: Likewise.
* ld-x86-64/tlsbin.sd: Likewise.
* ld-x86-64/ilp32-4.d: Likewise.
* ld-x86-64/tlsgdesc.dd: Add --no-ld-generated-unwind-info to ld
comment. Adjust.
* ld-x86-64/tlsdesc.rd: Likewise.
* ld-x86-64/tlsgd6.dd: Adjust.
* ld-x86-64/tlsgd5.dd: Likewise.
* ld-i386/i386.exp: Link some testcases with
--no-ld-generated-unwind-info.
* ld-i386/tlsbin.rd: Add --no-ld-generated-unwind-info to ld
comment..
* ld-i386/tlsdesc.dd: Likewise.
* ld-i386/tlspic.dd: Likewise.
* ld-i386/tlsdesc.sd: Likewise.
* ld-i386/tlsgdesc.dd: Likewise.
* ld-i386/tlsnopic.sd: Likewise.
* ld-i386/tlspic.rd: Likewise.
* ld-i386/tlsdesc.rd: Likewise.
* ld-i386/tlsbindesc.rd: Likewise.
* ld-i386/tlsbindesc.sd: Likewise.
* ld-i386/tlsbin.td: Likewise.
* ld-i386/tlsdesc.td: Likewise.
* ld-i386/tlsnopic.dd: Likewise.
* ld-i386/tlsbindesc.dd: Likewise.
* ld-i386/tlsbin.dd: Likewise.
* ld-i386/tlsgdesc.rd: Likewise.
* ld-i386/tlspic.sd: Likewise.
* ld-i386/tlsnopic.rd: Likewise.
* ld-i386/tlsbindesc.td: Likewise.
* ld-i386/tlspic.td: Likewise.
* ld-i386/tlsbin.sd: Likewise.
37 lines
1.9 KiB
Makefile
37 lines
1.9 KiB
Makefile
#source: start.s
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#as: --x32
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#ld: -m elf32_x86_64 -shared --no-ld-generated-unwind-info
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#readelf: -d -S --wide
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There are 10 section headers, starting at offset 0x22c:
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Section Headers:
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\[Nr\] Name Type Addr Off Size ES Flg Lk Inf Al
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\[ 0\] NULL 00000000 000000 000000 00 0 0 0
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\[ 1\] .hash HASH 00000094 000094 000030 04 A 2 0 4
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\[ 2\] .dynsym DYNSYM 000000c4 0000c4 000070 10 A 3 2 4
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\[ 3\] .dynstr STRTAB 00000134 000134 00001d 00 A 0 0 1
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\[ 4\] .rela.dyn RELA 00000154 000154 00000c 0c A 2 0 4
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\[ 5\] .text PROGBITS 00000160 000160 000005 00 AX 0 0 4
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\[ 6\] .dynamic DYNAMIC 00200168 000168 000078 08 WA 3 0 4
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\[ 7\] .shstrtab STRTAB 00000000 0001e0 00004a 00 0 0 1
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\[ 8\] .symtab SYMTAB 00000000 0003bc 0000e0 10 9 9 4
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\[ 9\] .strtab STRTAB 00000000 00049c 000043 00 0 0 1
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Key to Flags:
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W \(write\), A \(alloc\), X \(execute\), M \(merge\), S \(strings\), l \(large\)
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I \(info\), L \(link order\), G \(group\), T \(TLS\), E \(exclude\), x \(unknown\)
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O \(extra OS processing required\) o \(OS specific\), p \(processor specific\)
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Dynamic section at offset 0x168 contains 10 entries:
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Tag Type Name/Value
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0x00000004 \(HASH\) 0x94
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0x00000005 \(STRTAB\) 0x134
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0x00000006 \(SYMTAB\) 0xc4
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0x0000000a \(STRSZ\) 29 \(bytes\)
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0x0000000b \(SYMENT\) 16 \(bytes\)
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0x00000007 \(RELA\) 0x154
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0x00000008 \(RELASZ\) 12 \(bytes\)
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0x00000009 \(RELAENT\) 12 \(bytes\)
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0x00000016 \(TEXTREL\) 0x0
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0x00000000 \(NULL\) 0x0
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