diff options
Diffstat (limited to 'nsprpub/pr/src/md/unix/uxrng.c')
| -rw-r--r-- | nsprpub/pr/src/md/unix/uxrng.c | 111 |
1 files changed, 3 insertions, 108 deletions
diff --git a/nsprpub/pr/src/md/unix/uxrng.c b/nsprpub/pr/src/md/unix/uxrng.c index da2f7e9fe..479859000 100644 --- a/nsprpub/pr/src/md/unix/uxrng.c +++ b/nsprpub/pr/src/md/unix/uxrng.c @@ -20,7 +20,7 @@ GetHighResClock(void *buf, size_t maxbytes) hrtime_t t; t = gethrtime(); if (t) { - return _pr_CopyLowBits(buf, maxbytes, &t, sizeof(t)); + return _pr_CopyLowBits(buf, maxbytes, &t, sizeof(t)); } return 0; } @@ -54,28 +54,6 @@ GetHighResClock(void *buf, size_t maxbytes) } #endif -#elif defined(OSF1) - -#include <c_asm.h> - -/* - * Use the "get the cycle counter" instruction on the alpha. - * The low 32 bits completely turn over in less than a minute. - * The high 32 bits are some non-counter gunk that changes sometimes. - */ -static size_t -GetHighResClock(void *buf, size_t maxbytes) -{ - unsigned long t; - -#ifdef __GNUC__ - __asm__("rpcc %0" : "=r" (t)); -#else - t = asm("rpcc %v0"); -#endif - return _pr_CopyLowBits(buf, maxbytes, &t, sizeof(t)); -} - #elif defined(AIX) static size_t @@ -86,7 +64,7 @@ GetHighResClock(void *buf, size_t maxbytes) #elif (defined(LINUX) || defined(FREEBSD) || defined(__FreeBSD_kernel__) \ || defined(NETBSD) || defined(__NetBSD_kernel__) || defined(OPENBSD) \ - || defined(SYMBIAN) || defined(__GNU__)) + || defined(__GNU__)) #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> @@ -122,91 +100,8 @@ static size_t GetDevURandom( void *buf, size_t size ) static size_t GetHighResClock(void *buf, size_t maxbytes) -{ - return(GetDevURandom( buf, maxbytes )); -} - -#elif defined(IRIX) -#include <fcntl.h> -#undef PRIVATE -#include <sys/mman.h> -#include <sys/syssgi.h> -#include <sys/immu.h> -#include <sys/systeminfo.h> -#include <sys/utsname.h> - -static size_t GetHighResClock(void *buf, size_t maxbuf) { - unsigned phys_addr, raddr, cycleval; - static volatile unsigned *iotimer_addr = NULL; - static int tries = 0; - static int cntr_size; - int mfd; - unsigned s0[2]; - -#ifndef SGI_CYCLECNTR_SIZE -#define SGI_CYCLECNTR_SIZE 165 /* Size user needs to use to read CC */ -#endif - - if (iotimer_addr == NULL) { - if (tries++ > 1) { - /* Don't keep trying if it didn't work */ - return 0; - } - - /* - ** For SGI machines we can use the cycle counter, if it has one, - ** to generate some truly random numbers - */ - phys_addr = syssgi(SGI_QUERY_CYCLECNTR, &cycleval); - if (phys_addr) { - int pgsz = getpagesize(); - int pgoffmask = pgsz - 1; - - raddr = phys_addr & ~pgoffmask; - mfd = open("/dev/mmem", O_RDONLY); - if (mfd < 0) { - return 0; - } - iotimer_addr = (unsigned *) - mmap(0, pgoffmask, PROT_READ, MAP_PRIVATE, mfd, (int)raddr); - if (iotimer_addr == (unsigned*)-1) { - close(mfd); - iotimer_addr = NULL; - return 0; - } - iotimer_addr = (unsigned*) - ((__psint_t)iotimer_addr | (phys_addr & pgoffmask)); - /* - * The file 'mfd' is purposefully not closed. - */ - cntr_size = syssgi(SGI_CYCLECNTR_SIZE); - if (cntr_size < 0) { - struct utsname utsinfo; - - /* - * We must be executing on a 6.0 or earlier system, since the - * SGI_CYCLECNTR_SIZE call is not supported. - * - * The only pre-6.1 platforms with 64-bit counters are - * IP19 and IP21 (Challenge, PowerChallenge, Onyx). - */ - uname(&utsinfo); - if (!strncmp(utsinfo.machine, "IP19", 4) || - !strncmp(utsinfo.machine, "IP21", 4)) - cntr_size = 64; - else - cntr_size = 32; - } - cntr_size /= 8; /* Convert from bits to bytes */ - } - } - - s0[0] = *iotimer_addr; - if (cntr_size > 4) - s0[1] = *(iotimer_addr + 1); - memcpy(buf, (char *)&s0[0], cntr_size); - return _pr_CopyLowBits(buf, maxbuf, &s0, cntr_size); + return(GetDevURandom( buf, maxbytes )); } #elif defined(SCO) || defined(UNIXWARE) || defined(BSDI) || defined(NTO) \ |