Commit ec2ae4c8 authored by James Hogan's avatar James Hogan Committed by Ben Hutchings

arm64: Define AT_VECTOR_SIZE_ARCH for ARCH_DLINFO

commit 3146bc64 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: f668cd16 ("arm64: ELF definitions")
Signed-off-by: default avatarJames 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: default avatarWill Deacon <will.deacon@arm.com>
Signed-off-by: default avatarBen Hutchings <ben@decadent.org.uk>
parent 7b57c6f4
...@@ -137,6 +137,7 @@ extern unsigned long randomize_et_dyn(unsigned long base); ...@@ -137,6 +137,7 @@ extern unsigned long randomize_et_dyn(unsigned long base);
#define SET_PERSONALITY(ex) clear_thread_flag(TIF_32BIT); #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 \ #define ARCH_DLINFO \
do { \ do { \
NEW_AUX_ENT(AT_SYSINFO_EHDR, \ NEW_AUX_ENT(AT_SYSINFO_EHDR, \
......
...@@ -19,4 +19,6 @@ ...@@ -19,4 +19,6 @@
/* vDSO location */ /* vDSO location */
#define AT_SYSINFO_EHDR 33 #define AT_SYSINFO_EHDR 33
#define AT_VECTOR_SIZE_ARCH 1 /* entries in ARCH_DLINFO */
#endif #endif
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