56ceb5b540
This patch adds support for the R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX relocations proposed in https://groups.google.com/forum/#!topic/x86-64-abi/n9AWHogmVY0 to gas and ld. It updates gas to generate R_X86_64_GOTPCRELX, R_X86_64_REX_GOTPCRELX if there is a REX prefix, relocation for memory operand, foo@GOTPCREL(%rip). With the locally defined symbol, foo, we convert mov foo@GOTPCREL(%rip), %reg to lea foo(%rip), %reg and convert call/jmp *foo@GOTPCREL(%rip) to nop call foo/jmp foo nop When PIC is false, convert test %reg, foo@GOTPCREL(%rip) to test $foo, %reg and convert binop foo@GOTPCREL(%rip), %reg to binop $foo, %reg where binop is one of adc, add, and, cmp, or, sbb, sub, xor instructions. bfd/ * elf64-x86-64.c: Include opcode/i386.h. (x86_64_elf_howto_table): Add R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX. (R_X86_64_standard): Replace R_X86_64_PLT32_BND with R_X86_64_REX_GOTPCRELX. (x86_64_reloc_map): Add BFD_RELOC_X86_64_GOTPCRELX and BFD_RELOC_X86_64_REX_GOTPCRELX. (need_convert_mov_to_lea): Renamed to ... (need_convert_load): This. (elf_x86_64_check_relocs): Handle R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX. Replace need_convert_mov_to_lea with need_convert_load. (elf_x86_64_gc_sweep_hook): Handle R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX. (elf_x86_64_size_dynamic_sections): Likewise. (elf_x86_64_relocate_section): Likewise. (elf_x86_64_convert_mov_to_lea): Renamed to ... (elf_x86_64_convert_load): This. Replace need_convert_mov_to_lea with need_convert_load. Support R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX transformations. * reloc.c (BFD_RELOC_X86_64_GOTPCRELX): New. (BFD_RELOC_X86_64_REX_GOTPCRELX): Likewise. * bfd-in2.h: Regenerated. * libbfd.h: Likewise. gas/ * config/tc-i386.c (tc_i386_fix_adjustable): Handle BFD_RELOC_X86_64_GOTPCRELX and BFD_RELOC_X86_64_REX_GOTPCRELX. (tc_gen_reloc): Likewise. (i386_validate_fix): Generate BFD_RELOC_X86_64_GOTPCRELX or BFD_RELOC_X86_64_REX_GOTPCRELX if fx_tcbit2 is set. * config/tc-i386.h (TC_FORCE_RELOCATION_LOCAL): Also return true for BFD_RELOC_X86_64_GOTPCRELX and BFD_RELOC_X86_64_REX_GOTPCRELX. gas/testsuite/ * gas/i386/i386.exp: Run x86-64-gotpcrel. * gas/i386/x86-64-gotpcrel.d: New file. * gas/i386/x86-64-gotpcrel.s: Likewise. * gas/i386/ilp32/x86-64-gotpcrel.d: Likewise. * gas/i386/x86-64-localpic.d: Replace R_X86_64_GOTPCREL with R_X86_64_REX_GOTPCRELX. * gas/i386/ilp32/x86-64-localpic.d: Likewise. include/elf/ * x86-64.h (R_X86_64_GOTPCRELX): New. (R_X86_64_REX_GOTPCRELX): Likewise. ld/testsuite/ * ld-ifunc/ifunc-5r-local-x86-64.d: Replace R_X86_64_GOTPCREL with R_X86_64_REX_GOTPCRELX. * ld-x86-64/plt-main1.rd: Likewise. * ld-x86-64/plt-main3.rd: Likewise. * ld-x86-64/plt-main4.rd: Likewise. * ld-x86-64/gotpcrel1.dd: New file. * ld-x86-64/gotpcrel1.out: Likewise. * ld-x86-64/gotpcrel1a.S: Likewise. * ld-x86-64/gotpcrel1b.c: Likewise. * ld-x86-64/gotpcrel1c.c: Likewise. * ld-x86-64/gotpcrel1d.S: Likewise. * ld-x86-64/load1.s: Likewise. * ld-x86-64/load1a.d: Likewise. * ld-x86-64/load1b.d: Likewise. * ld-x86-64/load1c.d: Likewise. * ld-x86-64/load1d.d: Likewise. * ld-x86-64/x86-64.exp: Run load1a, load1b, load1c and load1d tests. Run gotpcrel1 test.
47 lines
3.7 KiB
Makefile
47 lines
3.7 KiB
Makefile
#source: load1.s
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#as: --x32
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#ld: -shared -melf32_x86_64
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#objdump: -dw
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.*: +file format .*
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Disassembly of section .text:
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0+[a-f0-9]+ <_start>:
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[ ]*[a-f0-9]+: 13 05 5e 01 20 00 adc 0x20015e\(%rip\),%eax # 2002d0 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 03 1d 58 01 20 00 add 0x200158\(%rip\),%ebx # 2002d0 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 23 0d 52 01 20 00 and 0x200152\(%rip\),%ecx # 2002d0 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 3b 15 4c 01 20 00 cmp 0x20014c\(%rip\),%edx # 2002d0 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 0b 35 46 01 20 00 or 0x200146\(%rip\),%esi # 2002d0 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 1b 3d 40 01 20 00 sbb 0x200140\(%rip\),%edi # 2002d0 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 2b 2d 3a 01 20 00 sub 0x20013a\(%rip\),%ebp # 2002d0 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 44 33 05 33 01 20 00 xor 0x200133\(%rip\),%r8d # 2002d0 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 44 85 3d 2c 01 20 00 test %r15d,0x20012c\(%rip\) # 2002d0 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 48 13 05 25 01 20 00 adc 0x200125\(%rip\),%rax # 2002d0 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 48 03 1d 1e 01 20 00 add 0x20011e\(%rip\),%rbx # 2002d0 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 48 23 0d 17 01 20 00 and 0x200117\(%rip\),%rcx # 2002d0 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 48 3b 15 10 01 20 00 cmp 0x200110\(%rip\),%rdx # 2002d0 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 48 0b 3d 09 01 20 00 or 0x200109\(%rip\),%rdi # 2002d0 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 48 1b 35 02 01 20 00 sbb 0x200102\(%rip\),%rsi # 2002d0 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 48 2b 2d fb 00 20 00 sub 0x2000fb\(%rip\),%rbp # 2002d0 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 4c 33 05 f4 00 20 00 xor 0x2000f4\(%rip\),%r8 # 2002d0 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 4c 85 3d ed 00 20 00 test %r15,0x2000ed\(%rip\) # 2002d0 <_DYNAMIC\+0x70>
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[ ]*[a-f0-9]+: 13 05 ef 00 20 00 adc 0x2000ef\(%rip\),%eax # 2002d8 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 03 1d e9 00 20 00 add 0x2000e9\(%rip\),%ebx # 2002d8 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 23 0d e3 00 20 00 and 0x2000e3\(%rip\),%ecx # 2002d8 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 3b 15 dd 00 20 00 cmp 0x2000dd\(%rip\),%edx # 2002d8 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 0b 35 d7 00 20 00 or 0x2000d7\(%rip\),%esi # 2002d8 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 1b 3d d1 00 20 00 sbb 0x2000d1\(%rip\),%edi # 2002d8 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 2b 2d cb 00 20 00 sub 0x2000cb\(%rip\),%ebp # 2002d8 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 44 33 05 c4 00 20 00 xor 0x2000c4\(%rip\),%r8d # 2002d8 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 44 85 3d bd 00 20 00 test %r15d,0x2000bd\(%rip\) # 2002d8 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 48 13 05 b6 00 20 00 adc 0x2000b6\(%rip\),%rax # 2002d8 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 48 03 1d af 00 20 00 add 0x2000af\(%rip\),%rbx # 2002d8 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 48 23 0d a8 00 20 00 and 0x2000a8\(%rip\),%rcx # 2002d8 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 48 3b 15 a1 00 20 00 cmp 0x2000a1\(%rip\),%rdx # 2002d8 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 48 0b 3d 9a 00 20 00 or 0x20009a\(%rip\),%rdi # 2002d8 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 48 1b 35 93 00 20 00 sbb 0x200093\(%rip\),%rsi # 2002d8 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 48 2b 2d 8c 00 20 00 sub 0x20008c\(%rip\),%rbp # 2002d8 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 4c 33 05 85 00 20 00 xor 0x200085\(%rip\),%r8 # 2002d8 <_DYNAMIC\+0x78>
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[ ]*[a-f0-9]+: 4c 85 3d 7e 00 20 00 test %r15,0x20007e\(%rip\) # 2002d8 <_DYNAMIC\+0x78>
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#pass
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