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130 lines
3.3 KiB
C
130 lines
3.3 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <setjmp.h>
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#include <signal.h>
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#include <unistd.h>
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#include <crypto.h>
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#include <openssl/bn.h>
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#define PPC_FPU64 (1<<0)
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#define PPC_ALTIVEC (1<<1)
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static int OPENSSL_ppccap_P = 0;
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static sigset_t all_masked;
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#ifdef OPENSSL_BN_ASM_MONT
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int bn_mul_mont(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,
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const BN_ULONG *np, const BN_ULONG *n0, int num)
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{
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int bn_mul_mont_fpu64(BN_ULONG *rp, const BN_ULONG *ap,
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const BN_ULONG *bp, const BN_ULONG *np,
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const BN_ULONG *n0, int num);
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int bn_mul_mont_int(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,
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const BN_ULONG *np, const BN_ULONG *n0, int num);
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if (sizeof(size_t) == 4) {
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# if (defined(__APPLE__) && defined(__MACH__))
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if (num >= 8 && (num & 3) == 0 && (OPENSSL_ppccap_P & PPC_FPU64))
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return bn_mul_mont_fpu64(rp, ap, bp, np, n0, num);
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# else
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/*
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* boundary of 32 was experimentally determined on Linux 2.6.22,
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* might have to be adjusted on AIX...
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*/
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if (num >= 32 && (num & 3) == 0 && (OPENSSL_ppccap_P & PPC_FPU64)) {
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sigset_t oset;
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int ret;
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sigprocmask(SIG_SETMASK, &all_masked, &oset);
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ret = bn_mul_mont_fpu64(rp, ap, bp, np, n0, num);
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sigprocmask(SIG_SETMASK, &oset, NULL);
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return ret;
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}
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# endif
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} else if ((OPENSSL_ppccap_P & PPC_FPU64))
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/*
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* this is a "must" on POWER6, but run-time detection is not
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* implemented yet...
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*/
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return bn_mul_mont_fpu64(rp, ap, bp, np, n0, num);
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return bn_mul_mont_int(rp, ap, bp, np, n0, num);
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}
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#endif
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static sigjmp_buf ill_jmp;
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static void ill_handler(int sig)
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{
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siglongjmp(ill_jmp, sig);
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}
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void OPENSSL_ppc64_probe(void);
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void OPENSSL_altivec_probe(void);
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void OPENSSL_cpuid_setup(void)
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{
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char *e;
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struct sigaction ill_oact, ill_act;
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sigset_t oset;
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static int trigger = 0;
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if (trigger)
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return;
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trigger = 1;
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sigfillset(&all_masked);
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sigdelset(&all_masked, SIGILL);
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sigdelset(&all_masked, SIGTRAP);
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#ifdef SIGEMT
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sigdelset(&all_masked, SIGEMT);
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#endif
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sigdelset(&all_masked, SIGFPE);
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sigdelset(&all_masked, SIGBUS);
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sigdelset(&all_masked, SIGSEGV);
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if ((e = getenv("OPENSSL_ppccap"))) {
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OPENSSL_ppccap_P = strtoul(e, NULL, 0);
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return;
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}
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OPENSSL_ppccap_P = 0;
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#if defined(_AIX)
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if (sizeof(size_t) == 4
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# if defined(_SC_AIX_KERNEL_BITMODE)
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&& sysconf(_SC_AIX_KERNEL_BITMODE) != 64
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# endif
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)
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return;
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#endif
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memset(&ill_act, 0, sizeof(ill_act));
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ill_act.sa_handler = ill_handler;
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ill_act.sa_mask = all_masked;
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sigprocmask(SIG_SETMASK, &ill_act.sa_mask, &oset);
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sigaction(SIGILL, &ill_act, &ill_oact);
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if (sizeof(size_t) == 4) {
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if (sigsetjmp(ill_jmp, 1) == 0) {
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OPENSSL_ppc64_probe();
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OPENSSL_ppccap_P |= PPC_FPU64;
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}
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} else {
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/*
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* Wanted code detecting POWER6 CPU and setting PPC_FPU64
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*/
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}
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if (sigsetjmp(ill_jmp, 1) == 0) {
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OPENSSL_altivec_probe();
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OPENSSL_ppccap_P |= PPC_ALTIVEC;
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}
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sigaction(SIGILL, &ill_oact, NULL);
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sigprocmask(SIG_SETMASK, &oset, NULL);
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}
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