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authorJames Hogan <james.hogan@imgtec.com>2016-07-25 16:59:52 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-09-07 08:32:36 +0200
commit4919b2a3b4a906869e0e2563028b5c4d47172a2e (patch)
treeb9650e108e07bad6ced126820a28d7496e11ff77 /arch
parent602857f223868365265e2d0f818b7bbbf31d48da (diff)
arm64: Define AT_VECTOR_SIZE_ARCH for ARCH_DLINFO
commit 3146bc64d12377a74dbda12b96ea32da3774ae07 upstream. AT_VECTOR_SIZE_ARCH should be defined with the maximum number of NEW_AUX_ENT entries that ARCH_DLINFO can contain, but it wasn't defined for arm64 at all even though ARCH_DLINFO will contain one NEW_AUX_ENT for the VDSO address. This shouldn't be a problem as AT_VECTOR_SIZE_BASE includes space for AT_BASE_PLATFORM which arm64 doesn't use, but lets define it now and add the comment above ARCH_DLINFO as found in several other architectures to remind future modifiers of ARCH_DLINFO to keep AT_VECTOR_SIZE_ARCH up to date. Fixes: f668cd1673aa ("arm64: ELF definitions") Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: linux-arm-kernel@lists.infradead.org Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm64/include/asm/elf.h1
-rw-r--r--arch/arm64/include/uapi/asm/auxvec.h2
2 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/elf.h b/arch/arm64/include/asm/elf.h
index bc6492b9a924..44dd892a4bbe 100644
--- a/arch/arm64/include/asm/elf.h
+++ b/arch/arm64/include/asm/elf.h
@@ -136,6 +136,7 @@ typedef struct user_fpsimd_state elf_fpregset_t;
#define SET_PERSONALITY(ex) clear_thread_flag(TIF_32BIT);
+/* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
#define ARCH_DLINFO \
do { \
NEW_AUX_ENT(AT_SYSINFO_EHDR, \
diff --git a/arch/arm64/include/uapi/asm/auxvec.h b/arch/arm64/include/uapi/asm/auxvec.h
index 22d6d8885854..4cf0c17787a8 100644
--- a/arch/arm64/include/uapi/asm/auxvec.h
+++ b/arch/arm64/include/uapi/asm/auxvec.h
@@ -19,4 +19,6 @@
/* vDSO location */
#define AT_SYSINFO_EHDR 33
+#define AT_VECTOR_SIZE_ARCH 1 /* entries in ARCH_DLINFO */
+
#endif