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arm64: add AT_HWCAP2 support for 32-bit compat

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Add support for the ELF auxv entry AT_HWCAP2 when running 32-bit
ELF binaries in compat mode.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
(cherry picked from commit 28964d32d4)
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Ard Biesheuvel
2014-03-03 07:34:45 +00:00
committed by Mark Brown
parent 5633cbcce8
commit 0e985d1688
2 changed files with 3 additions and 1 deletions
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3
arch/arm64/include/asm/hwcap.h
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@@ -41,7 +41,8 @@
#ifdef CONFIG_COMPAT
#define COMPAT_ELF_HWCAP (compat_elf_hwcap)
extern unsigned int compat_elf_hwcap;
#define COMPAT_ELF_HWCAP2 (compat_elf_hwcap2)
extern unsigned int compat_elf_hwcap, compat_elf_hwcap2;
#endif
extern unsigned int elf_hwcap;

1
arch/arm64/kernel/setup.c
View File

@@ -68,6 +68,7 @@ EXPORT_SYMBOL_GPL(elf_hwcap);
COMPAT_HWCAP_VFPv3|COMPAT_HWCAP_VFPv4|\
COMPAT_HWCAP_NEON|COMPAT_HWCAP_IDIV)
unsigned int compat_elf_hwcap __read_mostly = COMPAT_ELF_HWCAP_DEFAULT;
unsigned int compat_elf_hwcap2 __read_mostly;
#endif
static const char *cpu_name;