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https://sourceware.org/git/binutils-gdb.git
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cd04836359
Since _GLOBAL_OFFSET_TABLE_ may be referenced implicitly on x86, checking ref_regular_nonweak leaves the unused _GLOBAL_OFFSET_TABLE_ in output. This patch checks explicit GOT references instead. ld-i386/discarded1.s and ld-x86-64/discarded1.s are updated to avoid linker optimization which removes GOT references. bfd/ PR ld/22782 * elf32-i386.c (elf_i386_check_relocs): Set got_referenced if _GLOBAL_OFFSET_TABLE_ is referenced or GOT is needed to resolve undefined weak symbol to 0. * elf64-x86-64.c (elf_x86_64_check_relocs): Set got_referenced if _GLOBAL_OFFSET_TABLE_ is referenced. * elfxx-x86.c (_bfd_x86_elf_size_dynamic_sections): Check got_referenced instead of ref_regular_nonweak. Remove the unused _GLOBAL_OFFSET_TABLE_ from symbol table. * elfxx-x86.h (elf_x86_link_hash_table): Add got_referenced. ld/ PR ld/22782 * testsuite/ld-i386/discarded1.s: Replace mov with div. * testsuite/ld-x86-64/discarded1.s: Likewise. * testsuite/ld-i386/i386.exp: Run pr22782. * testsuite/ld-i386/load1-nacl.d: Updated for removing _GLOBAL_OFFSET_TABLE_ from output. * testsuite/ld-i386/load1.d: Likewise. * testsuite/ld-x86-64/load1a-nacl.d: Likewise. * testsuite/ld-x86-64/load1a.d: Likewise. * testsuite/ld-x86-64/load1b-nacl.d: Likewise. * testsuite/ld-x86-64/load1b.d: Likewise. * testsuite/ld-i386/pr22782.d: New file. * testsuite/ld-i386/pr22782.s: Likewise. * testsuite/ld-x86-64/pr22782.s: Likewise. * testsuite/ld-x86-64/pr22782a.d: Likewise. * testsuite/ld-x86-64/pr22782b.d: Likewise. * testsuite/ld-x86-64/x86-64.exp: Run pr22782a and pr22782b.
56 lines
2.4 KiB
Makefile
56 lines
2.4 KiB
Makefile
#source: load1.s
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#as: --x32
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#ld: -melf32_x86_64
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#objdump: -dw --sym
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#target: x86_64-*-nacl*
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.*: +file format .*
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SYMBOL TABLE:
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#...
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10030074 l O .data 0+1 bar
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#...
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10030075 g O .data 0+1 foo
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#...
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Disassembly of section .text:
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0+20000 <_start>:
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+[a-f0-9]+: 81 d0 74 00 03 10 adc \$0x10030074,%eax
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+[a-f0-9]+: 81 c3 74 00 03 10 add \$0x10030074,%ebx
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+[a-f0-9]+: 81 e1 74 00 03 10 and \$0x10030074,%ecx
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+[a-f0-9]+: 81 fa 74 00 03 10 cmp \$0x10030074,%edx
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+[a-f0-9]+: 81 ce 74 00 03 10 or \$0x10030074,%esi
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+[a-f0-9]+: 81 df 74 00 03 10 sbb \$0x10030074,%edi
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+[a-f0-9]+: 81 ed 74 00 03 10 sub \$0x10030074,%ebp
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+[a-f0-9]+: 41 81 f0 74 00 03 10 xor \$0x10030074,%r8d
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+[a-f0-9]+: 41 f7 c7 74 00 03 10 test \$0x10030074,%r15d
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+[a-f0-9]+: 48 81 d0 74 00 03 10 adc \$0x10030074,%rax
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+[a-f0-9]+: 48 81 c3 74 00 03 10 add \$0x10030074,%rbx
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+[a-f0-9]+: 48 81 e1 74 00 03 10 and \$0x10030074,%rcx
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+[a-f0-9]+: 48 81 fa 74 00 03 10 cmp \$0x10030074,%rdx
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+[a-f0-9]+: 48 81 cf 74 00 03 10 or \$0x10030074,%rdi
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+[a-f0-9]+: 48 81 de 74 00 03 10 sbb \$0x10030074,%rsi
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+[a-f0-9]+: 48 81 ed 74 00 03 10 sub \$0x10030074,%rbp
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+[a-f0-9]+: 49 81 f0 74 00 03 10 xor \$0x10030074,%r8
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+[a-f0-9]+: 49 f7 c7 74 00 03 10 test \$0x10030074,%r15
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+[a-f0-9]+: 81 d0 75 00 03 10 adc \$0x10030075,%eax
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+[a-f0-9]+: 81 c3 75 00 03 10 add \$0x10030075,%ebx
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+[a-f0-9]+: 81 e1 75 00 03 10 and \$0x10030075,%ecx
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+[a-f0-9]+: 81 fa 75 00 03 10 cmp \$0x10030075,%edx
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+[a-f0-9]+: 81 ce 75 00 03 10 or \$0x10030075,%esi
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+[a-f0-9]+: 81 df 75 00 03 10 sbb \$0x10030075,%edi
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+[a-f0-9]+: 81 ed 75 00 03 10 sub \$0x10030075,%ebp
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+[a-f0-9]+: 41 81 f0 75 00 03 10 xor \$0x10030075,%r8d
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+[a-f0-9]+: 41 f7 c7 75 00 03 10 test \$0x10030075,%r15d
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+[a-f0-9]+: 48 81 d0 75 00 03 10 adc \$0x10030075,%rax
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+[a-f0-9]+: 48 81 c3 75 00 03 10 add \$0x10030075,%rbx
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+[a-f0-9]+: 48 81 e1 75 00 03 10 and \$0x10030075,%rcx
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+[a-f0-9]+: 48 81 fa 75 00 03 10 cmp \$0x10030075,%rdx
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+[a-f0-9]+: 48 81 cf 75 00 03 10 or \$0x10030075,%rdi
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+[a-f0-9]+: 48 81 de 75 00 03 10 sbb \$0x10030075,%rsi
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+[a-f0-9]+: 48 81 ed 75 00 03 10 sub \$0x10030075,%rbp
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+[a-f0-9]+: 49 81 f0 75 00 03 10 xor \$0x10030075,%r8
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+[a-f0-9]+: 49 f7 c7 75 00 03 10 test \$0x10030075,%r15
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#pass
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