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
64 lines
1.6 KiB
C
64 lines
1.6 KiB
C
/* $NetBSD: elf_machdep.h,v 1.10 2009/05/30 05:56:52 skrll Exp $ */
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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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case EM_486: \
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break;
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#define ELF64_MACHDEP_ENDIANNESS XXX /* break compilation */
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#define ELF64_MACHDEP_ID_CASES \
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/* no 64-bit ELF machine types supported */
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#define ELF32_MACHDEP_ID EM_386
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#define ARCH_ELFSIZE 32 /* MD native binary size */
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/* i386 relocations */
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#define R_386_NONE 0
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#define R_386_32 1
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#define R_386_PC32 2
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#define R_386_GOT32 3
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#define R_386_PLT32 4
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#define R_386_COPY 5
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#define R_386_GLOB_DAT 6
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#define R_386_JMP_SLOT 7
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#define R_386_RELATIVE 8
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#define R_386_GOTOFF 9
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#define R_386_GOTPC 10
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/* TLS relocations */
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#define R_386_TLS_TPOFF 14
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#define R_386_TLS_IE 15
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#define R_386_TLS_GOTIE 16
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#define R_386_TLS_LE 17
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#define R_386_TLS_GD 18
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#define R_386_TLS_LDM 19
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/* The following relocations are GNU extensions. */
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#define R_386_16 20
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#define R_386_PC16 21
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#define R_386_8 22
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#define R_386_PC8 23
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/* More TLS relocations */
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#define R_386_TLS_GD_32 24
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#define R_386_TLS_GD_PUSH 25
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#define R_386_TLS_GD_CALL 26
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#define R_386_TLS_GD_POP 27
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#define R_386_TLS_LDM_32 28
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#define R_386_TLS_LDM_PUSH 29
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#define R_386_TLS_LDM_CALL 30
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#define R_386_TLS_LDM_POP 31
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#define R_386_TLS_LDO_32 32
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#define R_386_TLS_IE_32 33
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#define R_386_TLS_LE_32 34
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#define R_386_TLS_DTPMOD32 35
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#define R_386_TLS_DTPOFF32 36
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#define R_386_TLS_TPOFF32 37
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#define R_386_TLS_GOTDESC 39
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#define R_386_TLS_DESC_CALL 40
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#define R_386_TLS_DESC 41
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#define R_386_IRELATIVE 42
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#define R_TYPE(name) __CONCAT(R_386_,name)
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