1 Commits

Author	SHA1	Message	Date
H.J. Lu	56ceb5b540	Add R_X86_64_[REX_]GOTPCRELX support to gas and ld ... 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.	2015-10-22 04:49:38 -07:00