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authorWill Deacon <will.deacon@arm.com>2013-01-22 15:34:40 +0000
committerCatalin Marinas <catalin.marinas@arm.com>2013-01-22 17:50:59 +0000
commit9cf2b72b25f3f6a5a1a46a4f36037e66de52465c (patch)
treed4e62f892cb3097767bd5e58744b920884443b7a /arch/arm64
parent7d1f9aeff1ee4a20b1aeb377dd0f579fe9647619 (diff)
downloadlinux-9cf2b72b25f3f6a5a1a46a4f36037e66de52465c.tar.bz2
arm64: elf: fix core dumping to match what glibc expects
The kernel's internal definition of ELF_NGREG uses struct pt_regs, which means that we disagree with userspace on the size of coredumps since glibc correctly uses the user-visible struct user_pt_regs. This patch fixes our ELF_NGREG definition to use struct user_pt_regs and introduces our own ELF_CORE_COPY_REGS to convert between the user and kernel structure definitions. Cc: <stable@vger.kernel.org> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64')
-rw-r--r--arch/arm64/include/asm/elf.h5
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/arm64/include/asm/elf.h b/arch/arm64/include/asm/elf.h
index 07fea290d7c1..fe32c0e4ac01 100644
--- a/arch/arm64/include/asm/elf.h
+++ b/arch/arm64/include/asm/elf.h
@@ -26,7 +26,10 @@
typedef unsigned long elf_greg_t;
-#define ELF_NGREG (sizeof (struct pt_regs) / sizeof(elf_greg_t))
+#define ELF_NGREG (sizeof(struct user_pt_regs) / sizeof(elf_greg_t))
+#define ELF_CORE_COPY_REGS(dest, regs) \
+ *(struct user_pt_regs *)&(dest) = (regs)->user_regs;
+
typedef elf_greg_t elf_gregset_t[ELF_NGREG];
typedef struct user_fpsimd_state elf_fpregset_t;