/* * tclUnixCompat.c * * Written by: Zoran Vasiljevic (vasiljevic@users.sourceforge.net). * * See the file "license.terms" for information on usage and redistribution of * this file, and for a DISCLAIMER OF ALL WARRANTIES. */ #include "tclInt.h" #include #include /* * See also: SC_BLOCKING_STYLE in unix/tcl.m4 */ #ifdef USE_FIONBIO # ifdef HAVE_SYS_FILIO_H # include /* For FIONBIO. */ # endif # ifdef HAVE_SYS_IOCTL_H # include # endif #endif /* USE_FIONBIO */ /* * Used to pad structures at size'd boundaries * * This macro assumes that the pointer 'buffer' was created from an aligned * pointer by adding the 'length'. If this 'length' was not a multiple of the * 'size' the result is unaligned and PadBuffer corrects both the pointer, * _and_ the 'length'. The latter means that future increments of 'buffer' by * 'length' stay aligned. */ #define PadBuffer(buffer, length, size) \ if (((length) % (size))) { \ (buffer) += ((size) - ((length) % (size))); \ (length) += ((size) - ((length) % (size))); \ } /* * Per-thread private storage used to store values returned from MT-unsafe * library calls. */ #if TCL_THREADS typedef struct { struct passwd pwd; #if defined(HAVE_GETPWNAM_R_5) || defined(HAVE_GETPWUID_R_5) #define NEED_PW_CLEANER 1 char *pbuf; int pbuflen; #else char pbuf[2048]; #endif struct group grp; #if defined(HAVE_GETGRNAM_R_5) || defined(HAVE_GETGRGID_R_5) #define NEED_GR_CLEANER 1 char *gbuf; int gbuflen; #else char gbuf[2048]; #endif #if !defined(HAVE_MTSAFE_GETHOSTBYNAME) || !defined(HAVE_MTSAFE_GETHOSTBYADDR) struct hostent hent; char hbuf[2048]; #endif } ThreadSpecificData; static Tcl_ThreadDataKey dataKey; #if ((!defined(HAVE_GETHOSTBYNAME_R) || !defined(HAVE_GETHOSTBYADDR_R)) && \ (!defined(HAVE_MTSAFE_GETHOSTBYNAME) || \ !defined(HAVE_MTSAFE_GETHOSTBYADDR))) || \ !defined(HAVE_GETPWNAM_R) || !defined(HAVE_GETPWUID_R) || \ !defined(HAVE_GETGRNAM_R) || !defined(HAVE_GETGRGID_R) /* * Mutex to lock access to MT-unsafe calls. This is just to protect our own * usage. It does not protect us from others calling the same functions * without (or using some different) lock. */ static Tcl_Mutex compatLock; /* * Helper function declarations. Note that these are only used if needed and * only defined if used (via the NEED_* macros). */ #undef NEED_COPYARRAY #undef NEED_COPYGRP #undef NEED_COPYHOSTENT #undef NEED_COPYPWD #undef NEED_COPYSTRING #if !defined(HAVE_GETGRNAM_R_5) && !defined(HAVE_GETGRNAM_R_4) #define NEED_COPYGRP 1 static int CopyGrp(struct group *tgtPtr, char *buf, int buflen); #endif #if !defined(HAVE_GETPWNAM_R_5) && !defined(HAVE_GETPWNAM_R_4) #define NEED_COPYPWD 1 static int CopyPwd(struct passwd *tgtPtr, char *buf, int buflen); #endif static int CopyArray(char **src, int elsize, char *buf, int buflen); static int CopyHostent(struct hostent *tgtPtr, char *buf, int buflen); static int CopyString(const char *src, char *buf, int buflen); #endif #ifdef NEED_PW_CLEANER static void FreePwBuf(void *dummy); #endif #ifdef NEED_GR_CLEANER static void FreeGrBuf(void *dummy); #endif #endif /* TCL_THREADS */ /* *--------------------------------------------------------------------------- * * TclUnixSetBlockingMode -- * * Set the blocking mode of a file descriptor. * * Results: * * 0 on success, -1 (with errno set) on error. * *--------------------------------------------------------------------------- */ int TclUnixSetBlockingMode( int fd, /* File descriptor */ int mode) /* Either TCL_MODE_BLOCKING or * TCL_MODE_NONBLOCKING. */ { #ifndef USE_FIONBIO int flags = fcntl(fd, F_GETFL); if (mode == TCL_MODE_BLOCKING) { flags &= ~O_NONBLOCK; } else { flags |= O_NONBLOCK; } return fcntl(fd, F_SETFL, flags); #else /* USE_FIONBIO */ int state = (mode == TCL_MODE_NONBLOCKING); return ioctl(fd, FIONBIO, &state); #endif /* !USE_FIONBIO */ } /* *--------------------------------------------------------------------------- * * TclpGetPwNam -- * * Thread-safe wrappers for getpwnam(). See "man getpwnam" for more * details. * * Results: * Pointer to struct passwd on success or NULL on error. * * Side effects: * None. * *--------------------------------------------------------------------------- */ struct passwd * TclpGetPwNam( const char *name) { #if !TCL_THREADS return getpwnam(name); #else ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); #if defined(HAVE_GETPWNAM_R_5) struct passwd *pwPtr = NULL; /* * How to allocate a buffer of the right initial size. If you want the * gory detail, see http://www.opengroup.org/austin/docs/austin_328.txt * and weep. */ if (tsdPtr->pbuf == NULL) { tsdPtr->pbuflen = (int) sysconf(_SC_GETPW_R_SIZE_MAX); if (tsdPtr->pbuflen < 1) { tsdPtr->pbuflen = 1024; } tsdPtr->pbuf = (char *)Tcl_Alloc(tsdPtr->pbuflen); Tcl_CreateThreadExitHandler(FreePwBuf, NULL); } while (1) { int e = getpwnam_r(name, &tsdPtr->pwd, tsdPtr->pbuf, tsdPtr->pbuflen, &pwPtr); if (e == 0) { break; } else if (e != ERANGE) { return NULL; } tsdPtr->pbuflen *= 2; tsdPtr->pbuf = (char *)Tcl_Realloc(tsdPtr->pbuf, tsdPtr->pbuflen); } return (pwPtr != NULL ? &tsdPtr->pwd : NULL); #elif defined(HAVE_GETPWNAM_R_4) return getpwnam_r(name, &tsdPtr->pwd, tsdPtr->pbuf, sizeof(tsdPtr->pbuf)); #else struct passwd *pwPtr; Tcl_MutexLock(&compatLock); pwPtr = getpwnam(name); if (pwPtr != NULL) { tsdPtr->pwd = *pwPtr; pwPtr = &tsdPtr->pwd; if (CopyPwd(&tsdPtr->pwd, tsdPtr->pbuf, sizeof(tsdPtr->pbuf)) == -1) { pwPtr = NULL; } } Tcl_MutexUnlock(&compatLock); return pwPtr; #endif return NULL; /* Not reached. */ #endif /* TCL_THREADS */ } /* *--------------------------------------------------------------------------- * * TclpGetPwUid -- * * Thread-safe wrappers for getpwuid(). See "man getpwuid" for more * details. * * Results: * Pointer to struct passwd on success or NULL on error. * * Side effects: * None. * *--------------------------------------------------------------------------- */ struct passwd * TclpGetPwUid( uid_t uid) { #if !TCL_THREADS return getpwuid(uid); #else ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); #if defined(HAVE_GETPWUID_R_5) struct passwd *pwPtr = NULL; /* * How to allocate a buffer of the right initial size. If you want the * gory detail, see http://www.opengroup.org/austin/docs/austin_328.txt * and weep. */ if (tsdPtr->pbuf == NULL) { tsdPtr->pbuflen = (int) sysconf(_SC_GETPW_R_SIZE_MAX); if (tsdPtr->pbuflen < 1) { tsdPtr->pbuflen = 1024; } tsdPtr->pbuf = (char *)Tcl_Alloc(tsdPtr->pbuflen); Tcl_CreateThreadExitHandler(FreePwBuf, NULL); } while (1) { int e = getpwuid_r(uid, &tsdPtr->pwd, tsdPtr->pbuf, tsdPtr->pbuflen, &pwPtr); if (e == 0) { break; } else if (e != ERANGE) { return NULL; } tsdPtr->pbuflen *= 2; tsdPtr->pbuf = (char *)Tcl_Realloc(tsdPtr->pbuf, tsdPtr->pbuflen); } return (pwPtr != NULL ? &tsdPtr->pwd : NULL); #elif defined(HAVE_GETPWUID_R_4) return getpwuid_r(uid, &tsdPtr->pwd, tsdPtr->pbuf, sizeof(tsdPtr->pbuf)); #else struct passwd *pwPtr; Tcl_MutexLock(&compatLock); pwPtr = getpwuid(uid); if (pwPtr != NULL) { tsdPtr->pwd = *pwPtr; pwPtr = &tsdPtr->pwd; if (CopyPwd(&tsdPtr->pwd, tsdPtr->pbuf, sizeof(tsdPtr->pbuf)) == -1) { pwPtr = NULL; } } Tcl_MutexUnlock(&compatLock); return pwPtr; #endif return NULL; /* Not reached. */ #endif /* TCL_THREADS */ } /* *--------------------------------------------------------------------------- * * FreePwBuf -- * * Helper that is used to dispose of space allocated and referenced from * the ThreadSpecificData for user entries. (Darn that baroque POSIX * reentrant interface.) * *--------------------------------------------------------------------------- */ #ifdef NEED_PW_CLEANER static void FreePwBuf( TCL_UNUSED(void *)) { ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); Tcl_Free(tsdPtr->pbuf); } #endif /* NEED_PW_CLEANER */ /* *--------------------------------------------------------------------------- * * TclpGetGrNam -- * * Thread-safe wrappers for getgrnam(). See "man getgrnam" for more * details. * * Results: * Pointer to struct group on success or NULL on error. * * Side effects: * None. * *--------------------------------------------------------------------------- */ struct group * TclpGetGrNam( const char *name) { #if !TCL_THREADS return getgrnam(name); #else ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); #if defined(HAVE_GETGRNAM_R_5) struct group *grPtr = NULL; /* * How to allocate a buffer of the right initial size. If you want the * gory detail, see http://www.opengroup.org/austin/docs/austin_328.txt * and weep. */ if (tsdPtr->gbuf == NULL) { tsdPtr->gbuflen = (int) sysconf(_SC_GETGR_R_SIZE_MAX); if (tsdPtr->gbuflen < 1) { tsdPtr->gbuflen = 1024; } tsdPtr->gbuf = (char *)Tcl_Alloc(tsdPtr->gbuflen); Tcl_CreateThreadExitHandler(FreeGrBuf, NULL); } while (1) { int e = getgrnam_r(name, &tsdPtr->grp, tsdPtr->gbuf, tsdPtr->gbuflen, &grPtr); if (e == 0) { break; } else if (e != ERANGE) { return NULL; } tsdPtr->gbuflen *= 2; tsdPtr->gbuf = (char *)Tcl_Realloc(tsdPtr->gbuf, tsdPtr->gbuflen); } return (grPtr != NULL ? &tsdPtr->grp : NULL); #elif defined(HAVE_GETGRNAM_R_4) return getgrnam_r(name, &tsdPtr->grp, tsdPtr->gbuf, sizeof(tsdPtr->gbuf)); #else struct group *grPtr; Tcl_MutexLock(&compatLock); grPtr = getgrnam(name); if (grPtr != NULL) { tsdPtr->grp = *grPtr; grPtr = &tsdPtr->grp; if (CopyGrp(&tsdPtr->grp, tsdPtr->gbuf, sizeof(tsdPtr->gbuf)) == -1) { grPtr = NULL; } } Tcl_MutexUnlock(&compatLock); return grPtr; #endif return NULL; /* Not reached. */ #endif /* TCL_THREADS */ } /* *--------------------------------------------------------------------------- * * TclpGetGrGid -- * * Thread-safe wrappers for getgrgid(). See "man getgrgid" for more * details. * * Results: * Pointer to struct group on success or NULL on error. * * Side effects: * None. * *--------------------------------------------------------------------------- */ struct group * TclpGetGrGid( gid_t gid) { #if !TCL_THREADS return getgrgid(gid); #else ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); #if defined(HAVE_GETGRGID_R_5) struct group *grPtr = NULL; /* * How to allocate a buffer of the right initial size. If you want the * gory detail, see http://www.opengroup.org/austin/docs/austin_328.txt * and weep. */ if (tsdPtr->gbuf == NULL) { tsdPtr->gbuflen = (int) sysconf(_SC_GETGR_R_SIZE_MAX); if (tsdPtr->gbuflen < 1) { tsdPtr->gbuflen = 1024; } tsdPtr->gbuf = (char *)Tcl_Alloc(tsdPtr->gbuflen); Tcl_CreateThreadExitHandler(FreeGrBuf, NULL); } while (1) { int e = getgrgid_r(gid, &tsdPtr->grp, tsdPtr->gbuf, tsdPtr->gbuflen, &grPtr); if (e == 0) { break; } else if (e != ERANGE) { return NULL; } tsdPtr->gbuflen *= 2; tsdPtr->gbuf = (char *)Tcl_Realloc(tsdPtr->gbuf, tsdPtr->gbuflen); } return (grPtr != NULL ? &tsdPtr->grp : NULL); #elif defined(HAVE_GETGRGID_R_4) return getgrgid_r(gid, &tsdPtr->grp, tsdPtr->gbuf, sizeof(tsdPtr->gbuf)); #else struct group *grPtr; Tcl_MutexLock(&compatLock); grPtr = getgrgid(gid); if (grPtr != NULL) { tsdPtr->grp = *grPtr; grPtr = &tsdPtr->grp; if (CopyGrp(&tsdPtr->grp, tsdPtr->gbuf, sizeof(tsdPtr->gbuf)) == -1) { grPtr = NULL; } } Tcl_MutexUnlock(&compatLock); return grPtr; #endif return NULL; /* Not reached. */ #endif /* TCL_THREADS */ } /* *--------------------------------------------------------------------------- * * FreeGrBuf -- * * Helper that is used to dispose of space allocated and referenced from * the ThreadSpecificData for group entries. (Darn that baroque POSIX * reentrant interface.) * *--------------------------------------------------------------------------- */ #ifdef NEED_GR_CLEANER static void FreeGrBuf( TCL_UNUSED(void *)) { ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); Tcl_Free(tsdPtr->gbuf); } #endif /* NEED_GR_CLEANER */ /* *--------------------------------------------------------------------------- * * TclpGetHostByName -- * * Thread-safe wrappers for gethostbyname(). See "man gethostbyname" for * more details. * * Results: * Pointer to struct hostent on success or NULL on error. * * Side effects: * None. * *--------------------------------------------------------------------------- */ struct hostent * TclpGetHostByName( const char *name) { #if !TCL_THREADS || defined(HAVE_MTSAFE_GETHOSTBYNAME) return gethostbyname(name); #else ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); #if defined(HAVE_GETHOSTBYNAME_R_5) int local_errno; return gethostbyname_r(name, &tsdPtr->hent, tsdPtr->hbuf, sizeof(tsdPtr->hbuf), &local_errno); #elif defined(HAVE_GETHOSTBYNAME_R_6) struct hostent *hePtr = NULL; int local_errno, result; result = gethostbyname_r(name, &tsdPtr->hent, tsdPtr->hbuf, sizeof(tsdPtr->hbuf), &hePtr, &local_errno); return (result == 0) ? hePtr : NULL; #elif defined(HAVE_GETHOSTBYNAME_R_3) struct hostent_data data; return (gethostbyname_r(name, &tsdPtr->hent, &data) == 0) ? &tsdPtr->hent : NULL; #else #define NEED_COPYHOSTENT 1 struct hostent *hePtr; Tcl_MutexLock(&compatLock); hePtr = gethostbyname(name); if (hePtr != NULL) { tsdPtr->hent = *hePtr; hePtr = &tsdPtr->hent; if (CopyHostent(&tsdPtr->hent, tsdPtr->hbuf, sizeof(tsdPtr->hbuf)) == -1) { hePtr = NULL; } } Tcl_MutexUnlock(&compatLock); return hePtr; #endif return NULL; /* Not reached. */ #endif /* TCL_THREADS */ } /* *--------------------------------------------------------------------------- * * TclpGetHostByAddr -- * * Thread-safe wrappers for gethostbyaddr(). See "man gethostbyaddr" for * more details. * * Results: * Pointer to struct hostent on success or NULL on error. * * Side effects: * None. * *--------------------------------------------------------------------------- */ struct hostent * TclpGetHostByAddr( const char *addr, int length, int type) { #if !TCL_THREADS || defined(HAVE_MTSAFE_GETHOSTBYADDR) return gethostbyaddr(addr, length, type); #else ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); #if defined(HAVE_GETHOSTBYADDR_R_7) int local_errno; return gethostbyaddr_r(addr, length, type, &tsdPtr->hent, tsdPtr->hbuf, sizeof(tsdPtr->hbuf), &local_errno); #elif defined(HAVE_GETHOSTBYADDR_R_8) struct hostent *hePtr; int local_errno; return (gethostbyaddr_r(addr, length, type, &tsdPtr->hent, tsdPtr->hbuf, sizeof(tsdPtr->hbuf), &hePtr, &local_errno) == 0) ? &tsdPtr->hent : NULL; #else #define NEED_COPYHOSTENT 1 struct hostent *hePtr; Tcl_MutexLock(&compatLock); hePtr = gethostbyaddr(addr, length, type); if (hePtr != NULL) { tsdPtr->hent = *hePtr; hePtr = &tsdPtr->hent; if (CopyHostent(&tsdPtr->hent, tsdPtr->hbuf, sizeof(tsdPtr->hbuf)) == -1) { hePtr = NULL; } } Tcl_MutexUnlock(&compatLock); return hePtr; #endif return NULL; /* Not reached. */ #endif /* TCL_THREADS */ } /* *--------------------------------------------------------------------------- * * CopyGrp -- * * Copies string fields of the group structure to the private buffer, * honouring the size of the buffer. * * Results: * 0 on success or -1 on error (errno = ERANGE). * * Side effects: * None. * *--------------------------------------------------------------------------- */ #ifdef NEED_COPYGRP #define NEED_COPYARRAY 1 #define NEED_COPYSTRING 1 static int CopyGrp( struct group *tgtPtr, char *buf, int buflen) { char *p = buf; int copied, len = 0; /* * Copy username. */ copied = CopyString(tgtPtr->gr_name, p, buflen - len); if (copied == -1) { goto range; } tgtPtr->gr_name = (copied > 0) ? p : NULL; len += copied; p = buf + len; /* * Copy password. */ copied = CopyString(tgtPtr->gr_passwd, p, buflen - len); if (copied == -1) { goto range; } tgtPtr->gr_passwd = (copied > 0) ? p : NULL; len += copied; p = buf + len; /* * Copy group members. */ PadBuffer(p, len, sizeof(char *)); copied = CopyArray((char **)tgtPtr->gr_mem, -1, p, buflen - len); if (copied == -1) { goto range; } tgtPtr->gr_mem = (copied > 0) ? (char **)p : NULL; return 0; range: errno = ERANGE; return -1; } #endif /* NEED_COPYGRP */ /* *--------------------------------------------------------------------------- * * CopyHostent -- * * Copies string fields of the hostnent structure to the private buffer, * honouring the size of the buffer. * * Results: * Number of bytes copied on success or -1 on error (errno = ERANGE) * * Side effects: * None * *--------------------------------------------------------------------------- */ #ifdef NEED_COPYHOSTENT #define NEED_COPYSTRING 1 #define NEED_COPYARRAY 1 static int CopyHostent( struct hostent *tgtPtr, char *buf, int buflen) { char *p = buf; int copied, len = 0; copied = CopyString(tgtPtr->h_name, p, buflen - len); if (copied == -1) { goto range; } tgtPtr->h_name = (copied > 0) ? p : NULL; len += copied; p = buf + len; PadBuffer(p, len, sizeof(char *)); copied = CopyArray(tgtPtr->h_aliases, -1, p, buflen - len); if (copied == -1) { goto range; } tgtPtr->h_aliases = (copied > 0) ? (char **)p : NULL; len += copied; p += len; PadBuffer(p, len, sizeof(char *)); copied = CopyArray(tgtPtr->h_addr_list, tgtPtr->h_length, p, buflen-len); if (copied == -1) { goto range; } tgtPtr->h_addr_list = (copied > 0) ? (char **)p : NULL; return 0; range: errno = ERANGE; return -1; } #endif /* NEED_COPYHOSTENT */ /* *--------------------------------------------------------------------------- * * CopyPwd -- * * Copies string fields of the passwd structure to the private buffer, * honouring the size of the buffer. * * Results: * 0 on success or -1 on error (errno = ERANGE). * * Side effects: * We are not copying the gecos field as it may not be supported on all * platforms. * *--------------------------------------------------------------------------- */ #ifdef NEED_COPYPWD #define NEED_COPYSTRING 1 static int CopyPwd( struct passwd *tgtPtr, char *buf, int buflen) { char *p = buf; int copied, len = 0; copied = CopyString(tgtPtr->pw_name, p, buflen - len); if (copied == -1) { range: errno = ERANGE; return -1; } tgtPtr->pw_name = (copied > 0) ? p : NULL; len += copied; p = buf + len; copied = CopyString(tgtPtr->pw_passwd, p, buflen - len); if (copied == -1) { goto range; } tgtPtr->pw_passwd = (copied > 0) ? p : NULL; len += copied; p = buf + len; copied = CopyString(tgtPtr->pw_dir, p, buflen - len); if (copied == -1) { goto range; } tgtPtr->pw_dir = (copied > 0) ? p : NULL; len += copied; p = buf + len; copied = CopyString(tgtPtr->pw_shell, p, buflen - len); if (copied == -1) { goto range; } tgtPtr->pw_shell = (copied > 0) ? p : NULL; return 0; } #endif /* NEED_COPYPWD */ /* *--------------------------------------------------------------------------- * * CopyArray -- * * Copies array of NULL-terminated or fixed-length strings to the private * buffer, honouring the size of the buffer. * * Results: * Number of bytes copied on success or -1 on error (errno = ERANGE) * * Side effects: * None. * *--------------------------------------------------------------------------- */ #ifdef NEED_COPYARRAY static int CopyArray( char **src, /* Array of elements to copy. */ int elsize, /* Size of each element, or -1 to indicate * that they are C strings of dynamic * length. */ char *buf, /* Buffer to copy into. */ int buflen) /* Size of buffer. */ { int i, j, len = 0; char *p, **newBuffer; if (src == NULL) { return 0; } for (i = 0; src[i] != NULL; i++) { /* * Empty loop to count how many. */ } len = sizeof(char *) * (i + 1); /* Leave place for the array. */ if (len > buflen) { return -1; } newBuffer = (char **)buf; p = buf + len; for (j = 0; j < i; j++) { int sz = (elsize<0 ? (int) strlen(src[j]) + 1 : elsize); len += sz; if (len > buflen) { return -1; } memcpy(p, src[j], sz); newBuffer[j] = p; p = buf + len; } newBuffer[j] = NULL; return len; } #endif /* NEED_COPYARRAY */ /* *--------------------------------------------------------------------------- * * CopyString -- * * Copies a NULL-terminated string to the private buffer, honouring the * size of the buffer * * Results: * 0 success or -1 on error (errno = ERANGE) * * Side effects: * None * *--------------------------------------------------------------------------- */ #ifdef NEED_COPYSTRING static int CopyString( const char *src, /* String to copy. */ char *buf, /* Buffer to copy into. */ int buflen) /* Size of buffer. */ { int len = 0; if (src != NULL) { len = strlen(src) + 1; if (len > buflen) { return -1; } memcpy(buf, src, len); } return len; } #endif /* NEED_COPYSTRING */ /* * Local Variables: * mode: c * c-basic-offset: 4 * fill-column: 78 * End: */ /* *------------------------------------------------------------------------ * * TclWinCPUID -- * * Get CPU ID information on an Intel box under UNIX (either Linux or Cygwin) * * Results: * Returns TCL_OK if successful, TCL_ERROR if CPUID is not supported. * * Side effects: * If successful, stores EAX, EBX, ECX and EDX registers after the CPUID * instruction in the four integers designated by 'regsPtr' * *---------------------------------------------------------------------- */ int TclWinCPUID( int index, /* Which CPUID value to retrieve. */ int *regsPtr) /* Registers after the CPUID. */ { int status = TCL_ERROR; /* See: */ #if defined(__x86_64__) || defined(_M_AMD64) || defined (_M_X64) __asm__ __volatile__("movq %%rbx, %%rsi \n\t" /* save %rbx */ "cpuid \n\t" "xchgq %%rsi, %%rbx \n\t" /* restore the old %rbx */ : "=a"(regsPtr[0]), "=S"(regsPtr[1]), "=c"(regsPtr[2]), "=d"(regsPtr[3]) : "a"(index)); status = TCL_OK; #elif defined(__i386__) || defined(_M_IX86) __asm__ __volatile__("mov %%ebx, %%esi \n\t" /* save %ebx */ "cpuid \n\t" "xchg %%esi, %%ebx \n\t" /* restore the old %ebx */ : "=a"(regsPtr[0]), "=S"(regsPtr[1]), "=c"(regsPtr[2]), "=d"(regsPtr[3]) : "a"(index)); status = TCL_OK; #else (void)index; (void)regsPtr; #endif return status; } /* * Local Variables: * mode: c * c-basic-offset: 4 * fill-column: 78 * End: */