Kyle McMartin wrote:
> More reliable than playing games with signal handling in libraries.
>
> --- a/crypto/armcap.c
> +++ b/crypto/armcap.c
> @@ -9,11 +9,6 @@
>
> unsigned int OPENSSL_armcap_P;
>
> -static sigset_t all_masked;
> -
> -static sigjmp_buf ill_jmp;
> -static void ill_handler (int sig) { siglongjmp(ill_jmp,sig); }
> -
> /*
> * Following subroutines could have been inlined, but it's not all
> * ARM compilers support inline assembler...
> @@ -29,24 +24,26 @@ unsigned int OPENSSL_rdtsc(void)
> return 0;
> }
>
> -#if defined(__GNUC__) && __GNUC__>=2
> -void OPENSSL_cpuid_setup(void) __attribute__((constructor));
> -#endif
> -void OPENSSL_cpuid_setup(void)
> +#if defined(__GLIBC__) && __GLIBC__>=2 && __GLIBC_MINOR__>=16
This will break on glibc-3.0.
#if defined(__GLIBC_PREREQ) && __GLIBC_PREREQ(2, 16)
> +#include <sys/auxv.h>
> +
> +void OPENSSL_cpuid_find(void)
> + {
> + unsigned long hwcap = getauxval(AT_HWCAP);
> + char *plat = (char *)getauxval(AT_PLATFORM);
> +
> + OPENSSL_armcap_P |= hwcap & HWCAP_ARM_NEON ? ARMV7_NEON : 0;
> + OPENSSL_armcap_P |= plat ? (plat[1] == '7' ? ARMV7_TICK : 0) :
> 0;
> + }
> +#else
> +static sigset_t all_masked;
> +static sigjmp_buf ill_jmp;
> +static void ill_handler (int sig) { siglongjmp(ill_jmp,sig); }
> +
> +void OPENSSL_cpuid_find(void)
> {
> - char *e;
> struct sigaction ill_oact,ill_act;
> sigset_t oset;
> - static int trigger=0;
> -
> - if (trigger) return;
> - trigger=1;
> -
> - if ((e=getenv("OPENSSL_armcap")))
> - {
> - OPENSSL_armcap_P=strtoul(e,NULL,0);
> - return;
> - }
>
> sigfillset(&all_masked);
> sigdelset(&all_masked,SIGILL);
> @@ -55,8 +52,6 @@ void OPENSSL_cpuid_setup(void)
> sigdelset(&all_masked,SIGBUS);
> sigdelset(&all_masked,SIGSEGV);
>
> - OPENSSL_armcap_P = 0;
> -
> memset(&ill_act,0,sizeof(ill_act));
> ill_act.sa_handler = ill_handler;
> ill_act.sa_mask = all_masked;
> @@ -78,3 +73,25 @@ void OPENSSL_cpuid_setup(void)
> sigaction (SIGILL,&ill_oact,NULL);
> sigprocmask(SIG_SETMASK,&oset,NULL);
> }
> +#endif
> +
> +#if defined(__GNUC__) && __GNUC__>=2
> +void OPENSSL_cpuid_setup(void) __attribute__((constructor));
> +#endif
> +void OPENSSL_cpuid_setup(void)
> + {
> + char *e;
> + static int trigger=0;
> +
> + if (trigger) return;
> + trigger=1;
> +
> + if ((e=getenv("OPENSSL_armcap")))
> + {
> + OPENSSL_armcap_P=strtoul(e,NULL,0);
> + return;
> + }
> +
> + OPENSSL_armcap_P = 0;
> + OPENSSL_cpuid_find();
> + }
> ______________________________________________________________________
> OpenSSL Project http://www.openssl.org
> Development Mailing List openssl-dev@openssl.org
> Automated List Manager majord...@openssl.org
>
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OpenSSL Project http://www.openssl.org
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