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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* The Original Code is the Netscape Portable Runtime (NSPR).
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1999-2000
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* the Initial Developer. All Rights Reserved.
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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* ***** END LICENSE BLOCK ***** */
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GetHighResClock(void *buf, size_t maxbytes)
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return _pr_CopyLowBits(buf, maxbytes, &t, sizeof(t));
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GetHighResClock(void *buf, size_t maxbytes)
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#include <ia64/sys/inline.h>
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GetHighResClock(void *buf, size_t maxbytes)
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__asm__ __volatile__("mov %0 = ar.itc" : "=r" (t));
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t = _Asm_mov_from_ar(_AREG44);
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return _pr_CopyLowBits(buf, maxbytes, &t, sizeof(t));
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GetHighResClock(void *buf, size_t maxbytes)
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extern int ret_cr16();
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return(_pr_CopyLowBits(buf, maxbytes, &cr16val, sizeof(cr16val)));
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* Use the "get the cycle counter" instruction on the alpha.
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* The low 32 bits completely turn over in less than a minute.
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* The high 32 bits are some non-counter gunk that changes sometimes.
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GetHighResClock(void *buf, size_t maxbytes)
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__asm__("rpcc %0" : "=r" (t));
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return _pr_CopyLowBits(buf, maxbytes, &t, sizeof(t));
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GetHighResClock(void *buf, size_t maxbytes)
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#elif (defined(LINUX) || defined(FREEBSD) || defined(__FreeBSD_kernel__) \
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|| defined(NETBSD) || defined(__NetBSD_kernel__) || defined(OPENBSD) \
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#include <sys/types.h>
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#include <sys/stat.h>
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static int fdDevURandom;
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static PRCallOnceType coOpenDevURandom;
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static PRStatus OpenDevURandom( void )
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fdDevURandom = open( "/dev/urandom", O_RDONLY );
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return((-1 == fdDevURandom)? PR_FAILURE : PR_SUCCESS );
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} /* end OpenDevURandom() */
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static size_t GetDevURandom( void *buf, size_t size )
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rc = PR_CallOnce( &coOpenDevURandom, OpenDevURandom );
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if ( PR_FAILURE == rc ) {
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_PR_MD_MAP_OPEN_ERROR( errno );
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bytesIn = read( fdDevURandom, buf, size );
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if ( -1 == bytesIn ) {
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_PR_MD_MAP_READ_ERROR( errno );
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} /* end GetDevURandom() */
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GetHighResClock(void *buf, size_t maxbytes)
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return(GetDevURandom( buf, maxbytes ));
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GetHighResClock(void *buf, size_t maxbytes)
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#include <sys/mman.h>
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#include <sys/syssgi.h>
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#include <sys/immu.h>
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#include <sys/systeminfo.h>
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#include <sys/utsname.h>
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static size_t GetHighResClock(void *buf, size_t maxbuf)
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unsigned phys_addr, raddr, cycleval;
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static volatile unsigned *iotimer_addr = NULL;
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static int tries = 0;
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static int cntr_size;
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#ifndef SGI_CYCLECNTR_SIZE
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#define SGI_CYCLECNTR_SIZE 165 /* Size user needs to use to read CC */
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if (iotimer_addr == NULL) {
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/* Don't keep trying if it didn't work */
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** For SGI machines we can use the cycle counter, if it has one,
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** to generate some truly random numbers
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phys_addr = syssgi(SGI_QUERY_CYCLECNTR, &cycleval);
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int pgsz = getpagesize();
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int pgoffmask = pgsz - 1;
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raddr = phys_addr & ~pgoffmask;
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mfd = open("/dev/mmem", O_RDONLY);
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iotimer_addr = (unsigned *)
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mmap(0, pgoffmask, PROT_READ, MAP_PRIVATE, mfd, (int)raddr);
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if (iotimer_addr == (unsigned*)-1) {
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iotimer_addr = (unsigned*)
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((__psint_t)iotimer_addr | (phys_addr & pgoffmask));
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* The file 'mfd' is purposefully not closed.
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cntr_size = syssgi(SGI_CYCLECNTR_SIZE);
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struct utsname utsinfo;
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* We must be executing on a 6.0 or earlier system, since the
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* SGI_CYCLECNTR_SIZE call is not supported.
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* The only pre-6.1 platforms with 64-bit counters are
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* IP19 and IP21 (Challenge, PowerChallenge, Onyx).
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if (!strncmp(utsinfo.machine, "IP19", 4) ||
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!strncmp(utsinfo.machine, "IP21", 4))
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cntr_size /= 8; /* Convert from bits to bytes */
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s0[0] = *iotimer_addr;
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s0[1] = *(iotimer_addr + 1);
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memcpy(buf, (char *)&s0[0], cntr_size);
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return _pr_CopyLowBits(buf, maxbuf, &s0, cntr_size);
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GetHighResClock(void *buf, size_t maxbytes)
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#include <sys/times.h>
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GetHighResClock(void *buf, size_t maxbytes)
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ticks=times(&buffer);
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return _pr_CopyLowBits(buf, maxbytes, &ticks, sizeof(ticks));
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GetHighResClock(void *buf, size_t maxbytes)
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#elif defined(SCO) || defined(UNIXWARE) || defined(BSDI) || defined(NTO) \
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|| defined(QNX) || defined(DARWIN) || defined(RISCOS)
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#include <sys/times.h>
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GetHighResClock(void *buf, size_t maxbytes)
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ticks=times(&buffer);
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return _pr_CopyLowBits(buf, maxbytes, &ticks, sizeof(ticks));
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#error! Platform undefined
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#endif /* defined(SOLARIS) */
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extern PRSize _PR_MD_GetRandomNoise( void *buf, PRSize size )
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n += GetHighResClock(buf, size);
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s = _pr_CopyLowBits((char*)buf+n, size, &tv.tv_usec, sizeof(tv.tv_usec));
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s = _pr_CopyLowBits((char*)buf+n, size, &tv.tv_sec, sizeof(tv.tv_usec));
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} /* end _PR_MD_GetRandomNoise() */
added
removed
.pc/38_hurd.patch/mozilla/nsprpub/pr/src/md/unix/uxrng.c
