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MIPS: Define AT_VECTOR_SIZE_ARCH for ARCH_DLINFO 

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 MIPS 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 MIPS 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: ebb5e78cc6 ("MIPS: Initial implementation of a VDSO")
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-arch@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13823/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
James Hogan 2016-07-25 16:59:50 +01:00 committed by Ralf Baechle
parent 7e78db9975
commit 233b2ca181
2 changed files with 3 additions and 0 deletions
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1
arch/mips/include/asm/elf.h
View File

@ -458,6 +458,7 @@ extern const char *__elf_platform;
#define ELF_ET_DYN_BASE (TASK_SIZE / 3 * 2) #define ELF_ET_DYN_BASE (TASK_SIZE / 3 * 2)
#endif #endif
/* 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, \

2
arch/mips/include/uapi/asm/auxvec.h
View File

@ -14,4 +14,6 @@
/* Location of VDSO image. */ /* Location of VDSO image. */
#define AT_SYSINFO_EHDR 33 #define AT_SYSINFO_EHDR 33
#define AT_VECTOR_SIZE_ARCH 1 /* entries in ARCH_DLINFO */
#endif /* __ASM_AUXVEC_H */ #endif /* __ASM_AUXVEC_H */