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d27204260e
The only relocation type I saw in Debian's kernel module debug info was R_ARM_ABS32. R_ARM_REL32 is easy. The Linux kernel supports a bunch of other ones that don't seem relevant to debug info. Unfortunately, I wasn't able to test this because /proc/kcore doesn't exist on Arm. This apparently goes all the way back to 2003: https://lwn.net/Articles/45315/. Signed-off-by: Omar Sandoval <osandov@osandov.com>
39 lines
1.1 KiB
C
39 lines
1.1 KiB
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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/*
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* The ABI specification can be found at:
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* https://developer.arm.com/architectures/system-architectures/software-standards/abi
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* https://github.com/ARM-software/abi-aa/releases
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*/
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static struct drgn_error *
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apply_elf_reloc_arm(const struct drgn_relocating_section *relocating,
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uint64_t r_offset, uint32_t r_type, const int64_t *r_addend,
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uint64_t sym_value)
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{
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switch (r_type) {
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case R_ARM_NONE:
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return NULL;
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case R_ARM_ABS32:
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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_ARM_REL32:
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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_arm = {
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.name = "Arm",
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.arch = DRGN_ARCH_ARM,
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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_arm,
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};
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