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7535838cd5
The only relocation type I saw in Debian's kernel module debug info was R_386_32. R_386_PC32 is easy. The Linux kernel also supports R_386_PLT32, but that's the same story as R_X86_64_PLT32 in x86-64, so we don't implement it for now. I was torn between naming it i386, x86, or IA-32. x86 isn't immediately clear whether x86-64 is included or not. No one other than Intel calls it IA-32. i386 might incorrectly imply that it is strictly the original i386 instruction set with no later extensions, but the more general meaning is used frequently in the Linux world (e.g., Debian and QEMU both call it i386), so I went with that in the end. Signed-off-by: Omar Sandoval <osandov@osandov.com>
33 lines
925 B
C
33 lines
925 B
C
// Copyright (c) Meta Platforms, Inc. and affiliates.
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// SPDX-License-Identifier: GPL-3.0-or-later
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#include "platform.h" // IWYU pragma: associated
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static struct drgn_error *
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apply_elf_reloc_i386(const struct drgn_relocating_section *relocating,
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uint64_t r_offset, uint32_t r_type,
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const int64_t *r_addend, uint64_t sym_value)
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{
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switch (r_type) {
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case R_386_NONE:
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return NULL;
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case R_386_32:
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return drgn_reloc_add32(relocating, r_offset, r_addend,
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sym_value);
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case R_386_PC32:
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return drgn_reloc_add32(relocating, r_offset, r_addend,
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sym_value
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- (relocating->addr + r_offset));
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default:
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return DRGN_UNKNOWN_RELOCATION_TYPE(r_type);
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}
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}
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const struct drgn_architecture_info arch_info_i386 = {
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.name = "i386",
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.arch = DRGN_ARCH_I386,
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.default_flags = DRGN_PLATFORM_IS_LITTLE_ENDIAN,
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.register_by_name = drgn_register_by_name_unknown,
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.apply_elf_reloc = apply_elf_reloc_i386,
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};
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