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19e183b545
A subsequent fix for arm64 will use this parameter to parse the vma
information from the snapshot created by dump_vma_snapshot() rather than
traversing the vma list without the mmap_lock.
Fixes: 6dd8b1a0b6 ("arm64: mte: Dump the MTE tags in the core file")
Cc: <stable@vger.kernel.org> # 5.18.x
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Reported-by: Seth Jenkins <sethjenkins@google.com>
Suggested-by: Seth Jenkins <sethjenkins@google.com>
Cc: Will Deacon <will@kernel.org>
Cc: Eric Biederman <ebiederm@xmission.com>
Cc: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20221222181251.1345752-3-catalin.marinas@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
77 lines
1.7 KiB
C
77 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/elf.h>
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#include <linux/coredump.h>
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#include <linux/fs.h>
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#include <linux/mm.h>
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#include <asm/elf.h>
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Elf64_Half elf_core_extra_phdrs(struct coredump_params *cprm)
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{
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return GATE_EHDR->e_phnum;
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}
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int elf_core_write_extra_phdrs(struct coredump_params *cprm, loff_t offset)
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{
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const struct elf_phdr *const gate_phdrs =
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(const struct elf_phdr *) (GATE_ADDR + GATE_EHDR->e_phoff);
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int i;
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Elf64_Off ofs = 0;
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for (i = 0; i < GATE_EHDR->e_phnum; ++i) {
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struct elf_phdr phdr = gate_phdrs[i];
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if (phdr.p_type == PT_LOAD) {
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phdr.p_memsz = PAGE_ALIGN(phdr.p_memsz);
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phdr.p_filesz = phdr.p_memsz;
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if (ofs == 0) {
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ofs = phdr.p_offset = offset;
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offset += phdr.p_filesz;
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} else {
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phdr.p_offset = ofs;
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}
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} else {
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phdr.p_offset += ofs;
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}
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phdr.p_paddr = 0; /* match other core phdrs */
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if (!dump_emit(cprm, &phdr, sizeof(phdr)))
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return 0;
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}
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return 1;
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}
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int elf_core_write_extra_data(struct coredump_params *cprm)
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{
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const struct elf_phdr *const gate_phdrs =
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(const struct elf_phdr *) (GATE_ADDR + GATE_EHDR->e_phoff);
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int i;
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for (i = 0; i < GATE_EHDR->e_phnum; ++i) {
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if (gate_phdrs[i].p_type == PT_LOAD) {
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void *addr = (void *)gate_phdrs[i].p_vaddr;
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size_t memsz = PAGE_ALIGN(gate_phdrs[i].p_memsz);
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if (!dump_emit(cprm, addr, memsz))
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return 0;
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break;
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}
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}
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return 1;
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}
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size_t elf_core_extra_data_size(struct coredump_params *cprm)
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{
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const struct elf_phdr *const gate_phdrs =
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(const struct elf_phdr *) (GATE_ADDR + GATE_EHDR->e_phoff);
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int i;
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size_t size = 0;
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for (i = 0; i < GATE_EHDR->e_phnum; ++i) {
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if (gate_phdrs[i].p_type == PT_LOAD) {
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size += PAGE_ALIGN(gate_phdrs[i].p_memsz);
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break;
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}
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}
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return size;
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}
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