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avutil/cpu_internal: Provide ff_getauxval() wrapper for getauxvaul()

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Initially used for getauxval() but will be used to add support for
other API, such as elf_aux_info().

Signed-off-by: Brad Smith <brad@comstyle.com>
This commit is contained in:
Brad Smith
2024-09-09 06:20:11 -04:00
parent 5e9845f11e
commit fe4b9ef69f
7 changed files with 22 additions and 6 deletions
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4
libavutil/aarch64/cpu.c
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@@ -31,8 +31,8 @@ static int detect_flags(void)
{ {
int flags = 0; int flags = 0;
unsigned long hwcap = getauxval(AT_HWCAP); unsigned long hwcap = ff_getauxval(AT_HWCAP);
unsigned long hwcap2 = getauxval(AT_HWCAP2); unsigned long hwcap2 = ff_getauxval(AT_HWCAP2);
if (hwcap & HWCAP_AARCH64_ASIMDDP) if (hwcap & HWCAP_AARCH64_ASIMDDP)
flags |= AV_CPU_FLAG_DOTPROD; flags |= AV_CPU_FLAG_DOTPROD;

2
libavutil/arm/cpu.c
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@@ -55,7 +55,7 @@
static int get_auxval(uint32_t *hwcap) static int get_auxval(uint32_t *hwcap)
{ {
#if HAVE_GETAUXVAL #if HAVE_GETAUXVAL
unsigned long ret = getauxval(AT_HWCAP); unsigned long ret = ff_getauxval(AT_HWCAP);
if (ret == 0) if (ret == 0)
return -1; return -1;
*hwcap = ret; *hwcap = ret;

14
libavutil/cpu.c
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@@ -49,6 +49,10 @@
#include <unistd.h> #include <unistd.h>
#endif #endif
#if HAVE_GETAUXVAL
#include <sys/auxv.h>
#endif
static atomic_int cpu_flags = -1; static atomic_int cpu_flags = -1;
static atomic_int cpu_count = -1; static atomic_int cpu_count = -1;
@@ -283,3 +287,13 @@ size_t av_cpu_max_align(void)
return 8; return 8;
} }
unsigned long ff_getauxval(unsigned long type)
{
#if HAVE_GETAUXVAL
return getauxval(type);
#else
errno = ENOSYS;
return 0;
#endif
}

2
libavutil/cpu_internal.h
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@@ -59,4 +59,6 @@ size_t ff_get_cpu_max_align_ppc(void);
size_t ff_get_cpu_max_align_x86(void); size_t ff_get_cpu_max_align_x86(void);
size_t ff_get_cpu_max_align_loongarch(void); size_t ff_get_cpu_max_align_loongarch(void);
unsigned long ff_getauxval(unsigned long type);
#endif /* AVUTIL_CPU_INTERNAL_H */ #endif /* AVUTIL_CPU_INTERNAL_H */

2
libavutil/loongarch/cpu.c
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@@ -28,7 +28,7 @@
static int cpu_flags_getauxval(void) static int cpu_flags_getauxval(void)
{ {
int flags = 0; int flags = 0;
int flag = (int)getauxval(AT_HWCAP); int flag = (int)ff_getauxval(AT_HWCAP);
if (flag & LA_HWCAP_LSX) if (flag & LA_HWCAP_LSX)
flags |= AV_CPU_FLAG_LSX; flags |= AV_CPU_FLAG_LSX;

2
libavutil/mips/cpu.c
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@@ -34,7 +34,7 @@
static int cpucfg_available(void) static int cpucfg_available(void)
{ {
return getauxval(AT_HWCAP) & HWCAP_LOONGSON_CPUCFG; return ff_getauxval(AT_HWCAP) & HWCAP_LOONGSON_CPUCFG;
} }
/* Most toolchains have no CPUCFG support yet */ /* Most toolchains have no CPUCFG support yet */

2
libavutil/riscv/cpu.c
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@@ -86,7 +86,7 @@ int ff_get_cpu_flags_riscv(void)
} }
#elif HAVE_GETAUXVAL #elif HAVE_GETAUXVAL
{ {
const unsigned long hwcap = getauxval(AT_HWCAP); const unsigned long hwcap = ff_getauxval(AT_HWCAP);
if (hwcap & HWCAP_RV('I')) if (hwcap & HWCAP_RV('I'))
ret |= AV_CPU_FLAG_RVI; ret |= AV_CPU_FLAG_RVI;