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authorCatalin Marinas <catalin.marinas@arm.com>2022-04-25 18:18:33 +0300
committerWill Deacon <will@kernel.org>2022-04-28 13:37:06 +0300
commitc35fe2a68f29a0bda15ae994154cacaae5f69791 (patch)
tree123bc1df66adb383b774cde5cf4be32ff3839d24 /arch
parent23bc8f69f0eceecbb87c3801d2e48827d2dca92b (diff)
downloadlinux-c35fe2a68f29a0bda15ae994154cacaae5f69791.tar.xz
elf: Fix the arm64 MTE ELF segment name and value
Unfortunately, the name/value choice for the MTE ELF segment type (PT_ARM_MEMTAG_MTE) was pretty poor: LOPROC+1 is already in use by PT_AARCH64_UNWIND, as defined in the AArch64 ELF ABI (https://github.com/ARM-software/abi-aa/blob/main/aaelf64/aaelf64.rst). Update the ELF segment type value to LOPROC+2 and also change the define to PT_AARCH64_MEMTAG_MTE to match the AArch64 ELF ABI namespace. The AArch64 ELF ABI document is updating accordingly (segment type not previously mentioned in the document). Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Fixes: 761b9b366cec ("elf: Introduce the ARM MTE ELF segment type") Cc: Will Deacon <will@kernel.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Eric Biederman <ebiederm@xmission.com> Cc: Kees Cook <keescook@chromium.org> Cc: Luis Machado <luis.machado@arm.com> Cc: Richard Earnshaw <Richard.Earnshaw@arm.com> Link: https://lore.kernel.org/r/20220425151833.2603830-1-catalin.marinas@arm.com Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm64/kernel/elfcore.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm64/kernel/elfcore.c b/arch/arm64/kernel/elfcore.c
index 2b3f3d0544b9..98d67444a5b6 100644
--- a/arch/arm64/kernel/elfcore.c
+++ b/arch/arm64/kernel/elfcore.c
@@ -95,7 +95,7 @@ int elf_core_write_extra_phdrs(struct coredump_params *cprm, loff_t offset)
for_each_mte_vma(current, vma) {
struct elf_phdr phdr;
- phdr.p_type = PT_ARM_MEMTAG_MTE;
+ phdr.p_type = PT_AARCH64_MEMTAG_MTE;
phdr.p_offset = offset;
phdr.p_vaddr = vma->vm_start;
phdr.p_paddr = 0;