9aea164457
There are number of changes in the way IFUNC related relocations are done:
1. IRELATIVE relocations are now supported for x86/x86_64 and arm64.
2. IFUNC relocations are now relying on static linker to generate
them in correct order - this removes necessety of additional
relocation pass for ifuncs.
3. Related to 2: rela?.dyn relocations are preformed before .plt ones.
4. Ifunc are resolved on symbol lookup this approach allowed to avoid
mprotect(PROT_WRITE) call on r-x program segments.
Bug: 17399706
Bug: 17177284
Change-Id: I414dd3e82bd47cc03442c5dfc7c279949aec51ed
57 lines
1.3 KiB
C
57 lines
1.3 KiB
C
/* $NetBSD: elf_machdep.h,v 1.4 2010/03/18 08:28:33 cegger Exp $ */
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#if !defined __i386__
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#define ELF32_MACHDEP_ENDIANNESS ELFDATA2LSB
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#define ELF32_MACHDEP_ID_CASES \
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case EM_386: \
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break;
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#define ELF64_MACHDEP_ENDIANNESS ELFDATA2LSB
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#define ELF64_MACHDEP_ID_CASES \
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case EM_X86_64: \
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break;
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#define ELF32_MACHDEP_ID EM_386
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#define ELF64_MACHDEP_ID EM_X86_64
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#define ARCH_ELFSIZE 64 /* MD native binary size */
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/* x86-64 relocations */
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#define R_X86_64_NONE 0
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#define R_X86_64_64 1
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#define R_X86_64_PC32 2
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#define R_X86_64_GOT32 3
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#define R_X86_64_PLT32 4
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#define R_X86_64_COPY 5
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#define R_X86_64_GLOB_DAT 6
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#define R_X86_64_JUMP_SLOT 7
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#define R_X86_64_RELATIVE 8
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#define R_X86_64_GOTPCREL 9
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#define R_X86_64_32 10
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#define R_X86_64_32S 11
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#define R_X86_64_16 12
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#define R_X86_64_PC16 13
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#define R_X86_64_8 14
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#define R_X86_64_PC8 15
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/* TLS relocations */
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#define R_X86_64_DTPMOD64 16
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#define R_X86_64_DTPOFF64 17
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#define R_X86_64_TPOFF64 18
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#define R_X86_64_TLSGD 19
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#define R_X86_64_TLSLD 20
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#define R_X86_64_DTPOFF32 21
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#define R_X86_64_GOTTPOFF 22
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#define R_X86_64_TPOFF32 23
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#define R_X86_64_IRELATIVE 37
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#define R_TYPE(name) __CONCAT(R_X86_64_,name)
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#else /* !__i386__ */
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#include <i386/elf_machdep.h>
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#endif /* !__i386__ */
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