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https://sourceware.org/git/binutils-gdb.git
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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.
52 lines
1.3 KiB
ArmAsm
52 lines
1.3 KiB
ArmAsm
.data
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.type bar, @object
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bar:
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.byte 1
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.size bar, .-bar
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.globl foo
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.type foo, @object
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foo:
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.byte 1
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.size foo, .-foo
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.text
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.globl _start
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.type _start, @function
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_start:
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adcl bar@GOTPCREL(%rip), %eax
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addl bar@GOTPCREL(%rip), %ebx
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andl bar@GOTPCREL(%rip), %ecx
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cmpl bar@GOTPCREL(%rip), %edx
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orl bar@GOTPCREL(%rip), %esi
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sbbl bar@GOTPCREL(%rip), %edi
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subl bar@GOTPCREL(%rip), %ebp
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xorl bar@GOTPCREL(%rip), %r8d
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testl %r15d, bar@GOTPCREL(%rip)
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adcq bar@GOTPCREL(%rip), %rax
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addq bar@GOTPCREL(%rip), %rbx
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andq bar@GOTPCREL(%rip), %rcx
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cmpq bar@GOTPCREL(%rip), %rdx
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orq bar@GOTPCREL(%rip), %rdi
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sbbq bar@GOTPCREL(%rip), %rsi
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subq bar@GOTPCREL(%rip), %rbp
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xorq bar@GOTPCREL(%rip), %r8
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testq %r15, bar@GOTPCREL(%rip)
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adcl foo@GOTPCREL(%rip), %eax
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addl foo@GOTPCREL(%rip), %ebx
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andl foo@GOTPCREL(%rip), %ecx
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cmpl foo@GOTPCREL(%rip), %edx
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orl foo@GOTPCREL(%rip), %esi
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sbbl foo@GOTPCREL(%rip), %edi
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subl foo@GOTPCREL(%rip), %ebp
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xorl foo@GOTPCREL(%rip), %r8d
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testl %r15d, foo@GOTPCREL(%rip)
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adcq foo@GOTPCREL(%rip), %rax
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addq foo@GOTPCREL(%rip), %rbx
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andq foo@GOTPCREL(%rip), %rcx
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cmpq foo@GOTPCREL(%rip), %rdx
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orq foo@GOTPCREL(%rip), %rdi
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sbbq foo@GOTPCREL(%rip), %rsi
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subq foo@GOTPCREL(%rip), %rbp
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xorq foo@GOTPCREL(%rip), %r8
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testq %r15, foo@GOTPCREL(%rip)
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.size _start, .-_start
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