2 * Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
3 * Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
4 * Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
5 * Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
6 * Copyright (c) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
7 * Linux for s390 port by D.J. Barrow
8 * <barrow_dj@mail.yahoo.com,djbarrow@de.ibm.com>
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. The name of the author may not be used to endorse or promote products
20 * derived from this software without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 #include <sys/syscall.h>
41 #include <sys/param.h>
47 #include <machine/reg.h>
52 #if defined(linux) && (__GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 1))
53 #include <linux/ptrace.h>
56 #if defined(LINUX) && defined(IA64)
57 # include <asm/ptrace_offsets.h>
63 # define PTRACE_PEEKUSR PTRACE_PEEKUSER
64 #elif defined(HAVE_LINUX_PTRACE_H)
66 # ifdef HAVE_STRUCT_IA64_FPREG
67 # define ia64_fpreg XXX_ia64_fpreg
69 # ifdef HAVE_STRUCT_PT_ALL_USER_REGS
70 # define pt_all_user_regs XXX_pt_all_user_regs
72 #include <linux/ptrace.h>
74 # undef pt_all_user_regs
77 #ifdef SUNOS4_KERNEL_ARCH_KLUDGE
78 #include <sys/utsname.h>
79 #endif /* SUNOS4_KERNEL_ARCH_KLUDGE */
81 #if defined(LINUXSPARC) && defined (SPARC64)
82 # undef PTRACE_GETREGS
83 # define PTRACE_GETREGS PTRACE_GETREGS64
84 # undef PTRACE_SETREGS
85 # define PTRACE_SETREGS PTRACE_SETREGS64
90 #define MAX(a,b) (((a) > (b)) ? (a) : (b))
93 #define MIN(a,b) (((a) < (b)) ? (a) : (b))
97 tv_nz(struct timeval *a)
99 return a->tv_sec || a->tv_usec;
103 tv_cmp(struct timeval *a, struct timeval *b)
105 if (a->tv_sec < b->tv_sec
106 || (a->tv_sec == b->tv_sec && a->tv_usec < b->tv_usec))
108 if (a->tv_sec > b->tv_sec
109 || (a->tv_sec == b->tv_sec && a->tv_usec > b->tv_usec))
115 tv_float(struct timeval *tv)
117 return tv->tv_sec + tv->tv_usec/1000000.0;
121 tv_add(struct timeval *tv, struct timeval *a, struct timeval *b)
123 tv->tv_sec = a->tv_sec + b->tv_sec;
124 tv->tv_usec = a->tv_usec + b->tv_usec;
125 if (tv->tv_usec >= 1000000) {
127 tv->tv_usec -= 1000000;
132 tv_sub(struct timeval *tv, struct timeval *a, struct timeval *b)
134 tv->tv_sec = a->tv_sec - b->tv_sec;
135 tv->tv_usec = a->tv_usec - b->tv_usec;
136 if (((long) tv->tv_usec) < 0) {
138 tv->tv_usec += 1000000;
143 tv_div(struct timeval *tv, struct timeval *a, int n)
145 tv->tv_usec = (a->tv_sec % n * 1000000 + a->tv_usec + n / 2) / n;
146 tv->tv_sec = a->tv_sec / n + tv->tv_usec / 1000000;
147 tv->tv_usec %= 1000000;
151 tv_mul(struct timeval *tv, struct timeval *a, int n)
153 tv->tv_usec = a->tv_usec * n;
154 tv->tv_sec = a->tv_sec * n + tv->tv_usec / 1000000;
155 tv->tv_usec %= 1000000;
159 xlookup(const struct xlat *xlat, int val)
161 for (; xlat->str != NULL; xlat++)
162 if (xlat->val == val)
168 * Generic ptrace wrapper which tracks ESRCH errors
169 * by setting tcp->ptrace_errno to ESRCH.
171 * We assume that ESRCH indicates likely process death (SIGKILL?),
172 * modulo bugs where process somehow ended up not stopped.
173 * Unfortunately kernel uses ESRCH for that case too. Oh well.
175 * Currently used by upeek() only.
176 * TODO: use this in all other ptrace() calls while decoding.
179 do_ptrace(int request, struct tcb *tcp, void *addr, void *data)
184 l = ptrace(request, tcp->pid, addr, (long) data);
185 /* Non-ESRCH errors might be our invalid reg/mem accesses,
186 * we do not record them. */
188 tcp->ptrace_errno = ESRCH;
193 * Used when we want to unblock stopped traced process.
194 * Should be only used with PTRACE_CONT, PTRACE_DETACH and PTRACE_SYSCALL.
195 * Returns 0 on success or if error was ESRCH
196 * (presumably process was killed while we talk to it).
197 * Otherwise prints error message and returns -1.
200 ptrace_restart(int op, struct tcb *tcp, int sig)
206 ptrace(op, tcp->pid, (void *) 1, (long) sig);
208 if (!err || err == ESRCH)
211 tcp->ptrace_errno = err;
213 if (op == PTRACE_CONT)
215 if (op == PTRACE_DETACH)
217 fprintf(stderr, "strace: ptrace(PTRACE_%s,1,%d): %s\n",
218 msg, sig, strerror(err));
223 * Print entry in struct xlat table, if there.
226 printxval(const struct xlat *xlat, int val, const char *dflt)
228 const char *str = xlookup(xlat, val);
233 tprintf("%#x /* %s */", val, dflt);
238 * Print 64bit argument at position llarg and return the index of the next
242 printllval(struct tcb *tcp, const char *format, int llarg)
244 # if defined(FREEBSD) \
245 || (defined(LINUX) && defined(POWERPC) && !defined(POWERPC64)) \
246 || defined(LINUX_MIPSO32) \
247 || defined(__ARM_EABI__)
248 /* Align 64bit argument to 64bit boundary. */
249 llarg = (llarg + 1) & 0x1e;
251 # if defined LINUX && (defined X86_64 || defined POWERPC64)
252 if (current_personality == 0) {
253 tprintf(format, tcp->u_arg[llarg]);
257 /* Align 64bit argument to 64bit boundary. */
258 llarg = (llarg + 1) & 0x1e;
260 tprintf(format, LONG_LONG(tcp->u_arg[llarg], tcp->u_arg[llarg + 1]));
263 # elif defined IA64 || defined ALPHA
264 tprintf(format, tcp->u_arg[llarg]);
266 # elif defined LINUX_MIPSN32
267 tprintf(format, tcp->ext_arg[llarg]);
270 tprintf(format, LONG_LONG(tcp->u_arg[llarg], tcp->u_arg[llarg + 1]));
278 * Interpret `xlat' as an array of flags
279 * print the entries whose bits are on in `flags'
280 * return # of flags printed.
283 addflags(const struct xlat *xlat, int flags)
285 for (; xlat->str; xlat++) {
286 if (xlat->val && (flags & xlat->val) == xlat->val) {
287 tprintf("|%s", xlat->str);
292 tprintf("|%#x", flags);
297 * Interpret `xlat' as an array of flags.
298 * Print to static string the entries whose bits are on in `flags'
299 * Return static string.
302 sprintflags(const char *prefix, const struct xlat *xlat, int flags)
304 static char outstr[1024];
307 strcpy(outstr, prefix);
309 for (; xlat->str; xlat++) {
310 if ((flags & xlat->val) == xlat->val) {
313 strcat(outstr, xlat->str);
321 sprintf(outstr + strlen(outstr), "%#x", flags);
328 printflags(const struct xlat *xlat, int flags, const char *dflt)
333 if (flags == 0 && xlat->val == 0) {
334 tprintf("%s", xlat->str);
339 for (n = 0; xlat->str; xlat++) {
340 if (xlat->val && (flags & xlat->val) == xlat->val) {
341 tprintf("%s%s", sep, xlat->str);
350 tprintf("%s%#x", sep, flags);
355 tprintf("%#x", flags);
357 tprintf(" /* %s */", dflt);
368 printnum(struct tcb *tcp, long addr, const char *fmt)
376 if (umove(tcp, addr, &num) < 0) {
377 tprintf("%#lx", addr);
386 printnum_int(struct tcb *tcp, long addr, const char *fmt)
394 if (umove(tcp, addr, &num) < 0) {
395 tprintf("%#lx", addr);
404 printfd(struct tcb *tcp, int fd)
408 if (show_fd_path && (p = getfdpath(tcp, fd)))
409 tprintf("%d<%s>", fd, p);
415 printuid(const char *text, unsigned long uid)
418 tprintf((uid == -1) ? "%ld" : "%lu", uid);
421 static char path[MAXPATHLEN + 1];
424 * Quote string `instr' of length `size'
425 * Write up to (3 + `size' * 4) bytes to `outstr' buffer.
426 * If `len' < 0, treat `instr' as a NUL-terminated string
427 * and quote at most (`size' - 1) bytes.
430 string_quote(const char *instr, char *outstr, int len, int size)
432 const unsigned char *ustr = (const unsigned char *) instr;
434 int usehex = 0, c, i;
439 /* Check for presence of symbol which require
440 to hex-quote the whole string. */
441 for (i = 0; i < size; ++i) {
443 /* Check for NUL-terminated string. */
447 /* Quote at most size - 1 bytes. */
451 if (!isprint(c) && !isspace(c)) {
461 /* Hex-quote the whole string. */
462 for (i = 0; i < size; ++i) {
464 /* Check for NUL-terminated string. */
468 /* Quote at most size - 1 bytes. */
472 sprintf(s, "\\x%02x", c);
476 for (i = 0; i < size; ++i) {
478 /* Check for NUL-terminated string. */
482 /* Quote at most size - 1 bytes. */
487 case '\"': case '\\':
514 else if (i + 1 < size
515 && isdigit(ustr[i + 1])) {
516 sprintf(s, "\\%03o", c);
519 sprintf(s, "\\%o", c);
530 /* Return nonzero if the string was unterminated. */
535 * Print path string specified by address `addr' and length `n'.
536 * If path length exceeds `n', append `...' to the output.
539 printpathn(struct tcb *tcp, long addr, int n)
546 /* Cap path length to the path buffer size,
547 and NUL-terminate the buffer. */
548 if (n > sizeof path - 1)
552 /* Fetch one byte more to find out whether path length > n. */
553 if (umovestr(tcp, addr, n + 1, path) < 0)
554 tprintf("%#lx", addr);
556 static char outstr[4*(sizeof path - 1) + sizeof "\"...\""];
557 int trunc = (path[n] != '\0');
561 (void) string_quote(path, outstr, -1, n + 1);
563 strcat(outstr, "...");
564 tprintf("%s", outstr);
569 printpath(struct tcb *tcp, long addr)
571 printpathn(tcp, addr, sizeof path - 1);
575 * Print string specified by address `addr' and length `len'.
576 * If `len' < 0, treat the string as a NUL-terminated string.
577 * If string length exceeds `max_strlen', append `...' to the output.
580 printstr(struct tcb *tcp, long addr, int len)
582 static char *str = NULL;
590 /* Allocate static buffers if they are not allocated yet. */
592 str = malloc(max_strlen + 1);
594 outstr = malloc(4 * max_strlen + sizeof "\"...\"");
595 if (!str || !outstr) {
596 fprintf(stderr, "out of memory\n");
597 tprintf("%#lx", addr);
603 * Treat as a NUL-terminated string: fetch one byte more
604 * because string_quote() quotes one byte less.
606 size = max_strlen + 1;
607 str[max_strlen] = '\0';
608 if (umovestr(tcp, addr, size, str) < 0) {
609 tprintf("%#lx", addr);
614 size = MIN(len, max_strlen);
615 if (umoven(tcp, addr, size, str) < 0) {
616 tprintf("%#lx", addr);
621 if (string_quote(str, outstr, len, size) &&
622 (len < 0 || len > max_strlen))
623 strcat(outstr, "...");
625 tprintf("%s", outstr);
630 dumpiov(struct tcb *tcp, int len, long addr)
632 #if defined(LINUX) && SUPPORTED_PERSONALITIES > 1
634 struct { u_int32_t base; u_int32_t len; } *iov32;
635 struct { u_int64_t base; u_int64_t len; } *iov64;
637 #define iov iovu.iov64
639 (personality_wordsize[current_personality] == 4 \
640 ? sizeof(*iovu.iov32) : sizeof(*iovu.iov64))
641 #define iov_iov_base(i) \
642 (personality_wordsize[current_personality] == 4 \
643 ? (u_int64_t) iovu.iov32[i].base : iovu.iov64[i].base)
644 #define iov_iov_len(i) \
645 (personality_wordsize[current_personality] == 4 \
646 ? (u_int64_t) iovu.iov32[i].len : iovu.iov64[i].len)
649 #define sizeof_iov sizeof(*iov)
650 #define iov_iov_base(i) iov[i].iov_base
651 #define iov_iov_len(i) iov[i].iov_len
656 size = sizeof_iov * (unsigned long) len;
657 if (size / sizeof_iov != len
658 || (iov = malloc(size)) == NULL) {
659 fprintf(stderr, "out of memory\n");
662 if (umoven(tcp, addr, size, (char *) iov) >= 0) {
663 for (i = 0; i < len; i++) {
664 /* include the buffer number to make it easy to
665 * match up the trace with the source */
666 tprintf(" * %lu bytes in buffer %d\n",
667 (unsigned long)iov_iov_len(i), i);
668 dumpstr(tcp, (long) iov_iov_base(i),
681 dumpstr(struct tcb *tcp, long addr, int len)
683 static int strsize = -1;
684 static unsigned char *str;
685 static char outstr[80];
692 if ((str = malloc(len)) == NULL) {
693 fprintf(stderr, "out of memory\n");
699 if (umoven(tcp, addr, len, (char *) str) < 0)
702 for (i = 0; i < len; i += 16) {
704 sprintf(s, " | %05x ", i);
706 for (j = 0; j < 16; j++) {
710 sprintf(s, " %02x", str[i + j]);
714 *s++ = ' '; *s++ = ' '; *s++ = ' ';
717 *s++ = ' '; *s++ = ' ';
718 for (j = 0; j < 16; j++) {
722 if (isprint(str[i + j]))
730 tprintf("%s |\n", outstr);
734 #define PAGMASK (~(PAGSIZ - 1))
736 * move `len' bytes of data from process `pid'
737 * at address `addr' to our space at `laddr'
740 umoven(struct tcb *tcp, long addr, int len, char *laddr)
748 char x[sizeof(long)];
751 if (addr & (sizeof(long) - 1)) {
752 /* addr not a multiple of sizeof(long) */
753 n = addr - (addr & -sizeof(long)); /* residue */
754 addr &= -sizeof(long); /* residue */
756 u.val = ptrace(PTRACE_PEEKDATA, pid, (char *) addr, 0);
758 if (started && (errno==EPERM || errno==EIO)) {
759 /* Ran into 'end of memory' - stupid "printpath" */
762 /* But if not started, we had a bogus address. */
763 if (addr != 0 && errno != EIO && errno != ESRCH)
764 perror("ptrace: umoven");
768 memcpy(laddr, &u.x[n], m = MIN(sizeof(long) - n, len));
769 addr += sizeof(long), laddr += m, len -= m;
773 u.val = ptrace(PTRACE_PEEKDATA, pid, (char *) addr, 0);
775 if (started && (errno==EPERM || errno==EIO)) {
776 /* Ran into 'end of memory' - stupid "printpath" */
779 if (addr != 0 && errno != EIO && errno != ESRCH)
780 perror("ptrace: umoven");
784 memcpy(laddr, u.x, m = MIN(sizeof(long), len));
785 addr += sizeof(long), laddr += m, len -= m;
794 n = MIN(len, PAGSIZ);
795 n = MIN(n, ((addr + PAGSIZ) & PAGMASK) - addr);
796 if (ptrace(PTRACE_READDATA, pid,
797 (char *) addr, len, laddr) < 0) {
798 if (errno != ESRCH) {
799 perror("umoven: ptrace(PTRACE_READDATA, ...)");
811 #ifdef HAVE_MP_PROCFS
812 int fd = tcp->pfd_as;
816 lseek(fd, addr, SEEK_SET);
817 if (read(fd, laddr, len) == -1)
819 #endif /* USE_PROCFS */
825 * like `umove' but make the additional effort of looking
826 * for a terminating zero byte.
829 umovestr(struct tcb *tcp, long addr, int len, char *laddr)
832 #ifdef HAVE_MP_PROCFS
833 int fd = tcp->pfd_as;
837 /* Some systems (e.g. FreeBSD) can be upset if we read off the
838 end of valid memory, avoid this by trying to read up
839 to page boundaries. But we don't know what a page is (and
840 getpagesize(2) (if it exists) doesn't necessarily return
841 hardware page size). Assume all pages >= 1024 (a-historical
844 int page = 1024; /* How to find this? */
845 int move = page - (addr & (page - 1));
848 lseek(fd, addr, SEEK_SET);
851 if (move > left) move = left;
852 if ((move = read(fd, laddr, move)) <= 0)
853 return left != len ? 0 : -1;
854 if (memchr(laddr, 0, move)) break;
860 #else /* !USE_PROCFS */
866 char x[sizeof(long)];
869 if (addr & (sizeof(long) - 1)) {
870 /* addr not a multiple of sizeof(long) */
871 n = addr - (addr & -sizeof(long)); /* residue */
872 addr &= -sizeof(long); /* residue */
874 u.val = ptrace(PTRACE_PEEKDATA, pid, (char *)addr, 0);
876 if (started && (errno==EPERM || errno==EIO)) {
877 /* Ran into 'end of memory' - stupid "printpath" */
880 if (addr != 0 && errno != EIO && errno != ESRCH)
885 memcpy(laddr, &u.x[n], m = MIN(sizeof(long)-n, len));
886 while (n & (sizeof(long) - 1))
887 if (u.x[n++] == '\0')
889 addr += sizeof(long), laddr += m, len -= m;
893 u.val = ptrace(PTRACE_PEEKDATA, pid, (char *)addr, 0);
895 if (started && (errno==EPERM || errno==EIO)) {
896 /* Ran into 'end of memory' - stupid "printpath" */
899 if (addr != 0 && errno != EIO && errno != ESRCH)
904 memcpy(laddr, u.x, m = MIN(sizeof(long), len));
905 for (i = 0; i < sizeof(long); i++)
909 addr += sizeof(long), laddr += m, len -= m;
911 #endif /* !USE_PROCFS */
916 # if !defined (SPARC) && !defined(SPARC64)
917 # define PTRACE_WRITETEXT 101
918 # define PTRACE_WRITEDATA 102
919 # endif /* !SPARC && !SPARC64 */
925 uload(int cmd, int pid, long addr, int len, char *laddr)
931 char x[sizeof(long)];
934 if (cmd == PTRACE_WRITETEXT) {
935 peek = PTRACE_PEEKTEXT;
936 poke = PTRACE_POKETEXT;
939 peek = PTRACE_PEEKDATA;
940 poke = PTRACE_POKEDATA;
942 if (addr & (sizeof(long) - 1)) {
943 /* addr not a multiple of sizeof(long) */
944 n = addr - (addr & -sizeof(long)); /* residue */
945 addr &= -sizeof(long);
947 u.val = ptrace(peek, pid, (char *) addr, 0);
949 perror("uload: POKE");
952 memcpy(&u.x[n], laddr, m = MIN(sizeof(long) - n, len));
953 if (ptrace(poke, pid, (char *)addr, u.val) < 0) {
954 perror("uload: POKE");
957 addr += sizeof(long), laddr += m, len -= m;
960 if (len < sizeof(long))
961 u.val = ptrace(peek, pid, (char *) addr, 0);
962 memcpy(u.x, laddr, m = MIN(sizeof(long), len));
963 if (ptrace(poke, pid, (char *) addr, u.val) < 0) {
964 perror("uload: POKE");
967 addr += sizeof(long), laddr += m, len -= m;
973 tload(int pid, int addr, int len, char *laddr)
975 return uload(PTRACE_WRITETEXT, pid, addr, len, laddr);
979 dload(int pid, int addr, int len, char *laddr)
981 return uload(PTRACE_WRITEDATA, pid, addr, len, laddr);
989 upeek(struct tcb *tcp, long off, long *res)
993 # ifdef SUNOS4_KERNEL_ARCH_KLUDGE
995 static int is_sun4m = -1;
998 /* Round up the usual suspects. */
999 if (is_sun4m == -1) {
1000 if (uname(&name) < 0) {
1001 perror("upeek: uname?");
1004 is_sun4m = strcmp(name.machine, "sun4m") == 0;
1006 const struct xlat *x;
1008 for (x = struct_user_offsets; x->str; x++)
1015 # endif /* SUNOS4_KERNEL_ARCH_KLUDGE */
1017 val = do_ptrace(PTRACE_PEEKUSER, tcp, (char *) off, 0);
1018 if (val == -1 && errno) {
1019 if (errno != ESRCH) {
1021 sprintf(buf, "upeek: ptrace(PTRACE_PEEKUSER,%d,%lu,0)", tcp->pid, off);
1030 #endif /* !USE_PROCFS */
1033 printcall(struct tcb *tcp)
1035 #define PRINTBADPC tprintf(sizeof(long) == 4 ? "[????????] " : \
1036 sizeof(long) == 8 ? "[????????????????] " : \
1043 if (upeek(tcp, 4*EIP, &eip) < 0) {
1047 tprintf("[%08lx] ", eip);
1049 # elif defined(S390) || defined(S390X)
1051 if (upeek(tcp, PT_PSWADDR, &psw) < 0) {
1056 tprintf("[%08lx] ", psw);
1058 tprintf("[%16lx] ", psw);
1061 # elif defined(X86_64)
1064 if (upeek(tcp, 8*RIP, &rip) < 0) {
1068 tprintf("[%16lx] ", rip);
1069 # elif defined(IA64)
1072 if (upeek(tcp, PT_B0, &ip) < 0) {
1076 tprintf("[%08lx] ", ip);
1077 # elif defined(POWERPC)
1080 if (upeek(tcp, sizeof(unsigned long)*PT_NIP, &pc) < 0) {
1085 tprintf("[%016lx] ", pc);
1087 tprintf("[%08lx] ", pc);
1089 # elif defined(M68K)
1092 if (upeek(tcp, 4*PT_PC, &pc) < 0) {
1093 tprintf("[????????] ");
1096 tprintf("[%08lx] ", pc);
1097 # elif defined(ALPHA)
1100 if (upeek(tcp, REG_PC, &pc) < 0) {
1101 tprintf("[????????????????] ");
1104 tprintf("[%08lx] ", pc);
1105 # elif defined(SPARC) || defined(SPARC64)
1106 struct pt_regs regs;
1107 if (ptrace(PTRACE_GETREGS, tcp->pid, (char *)®s, 0) < 0) {
1111 # if defined(SPARC64)
1112 tprintf("[%08lx] ", regs.tpc);
1114 tprintf("[%08lx] ", regs.pc);
1116 # elif defined(HPPA)
1119 if (upeek(tcp, PT_IAOQ0, &pc) < 0) {
1120 tprintf("[????????] ");
1123 tprintf("[%08lx] ", pc);
1124 # elif defined(MIPS)
1127 if (upeek(tcp, REG_EPC, &pc) < 0) {
1128 tprintf("[????????] ");
1131 tprintf("[%08lx] ", pc);
1135 if (upeek(tcp, 4*REG_PC, &pc) < 0) {
1136 tprintf("[????????] ");
1139 tprintf("[%08lx] ", pc);
1140 # elif defined(SH64)
1143 if (upeek(tcp, REG_PC, &pc) < 0) {
1144 tprintf("[????????????????] ");
1147 tprintf("[%08lx] ", pc);
1151 if (upeek(tcp, 4*15, &pc) < 0) {
1155 tprintf("[%08lx] ", pc);
1156 # elif defined(AVR32)
1159 if (upeek(tcp, REG_PC, &pc) < 0) {
1160 tprintf("[????????] ");
1163 tprintf("[%08lx] ", pc);
1164 # elif defined(BFIN)
1167 if (upeek(tcp, PT_PC, &pc) < 0) {
1171 tprintf("[%08lx] ", pc);
1172 #elif defined(CRISV10)
1175 if (upeek(tcp, 4*PT_IRP, &pc) < 0) {
1179 tprintf("[%08lx] ", pc);
1180 #elif defined(CRISV32)
1183 if (upeek(tcp, 4*PT_ERP, &pc) < 0) {
1187 tprintf("[%08lx] ", pc);
1188 # endif /* architecture */
1194 if (ptrace(PTRACE_GETREGS, tcp->pid, (char *) ®s, 0) < 0) {
1195 perror("printcall: ptrace(PTRACE_GETREGS, ...)");
1199 tprintf("[%08x] ", regs.r_o7);
1209 pread(tcp->pfd_reg, ®s, sizeof(regs), 0);
1210 tprintf("[%08x] ", regs.r_eip);
1211 #endif /* FREEBSD */
1216 * These #if's are huge, please indent them correctly.
1217 * It's easy to get confused otherwise.
1223 # include "syscall.h"
1225 # include <sys/syscall.h>
1226 # ifndef CLONE_PTRACE
1227 # define CLONE_PTRACE 0x00002000
1229 # ifndef CLONE_VFORK
1230 # define CLONE_VFORK 0x00004000
1233 # define CLONE_VM 0x00000100
1235 # ifndef CLONE_STOPPED
1236 # define CLONE_STOPPED 0x02000000
1241 /* We don't have fork()/vfork() syscalls on ia64 itself, but the ia32
1242 subsystem has them for x86... */
1244 # define SYS_vfork 190
1246 typedef unsigned long *arg_setup_state;
1249 arg_setup(struct tcb *tcp, arg_setup_state *state)
1251 unsigned long cfm, sof, sol;
1255 /* Satisfy a false GCC warning. */
1260 if (upeek(tcp, PT_AR_BSP, &bsp) < 0)
1262 if (upeek(tcp, PT_CFM, (long *) &cfm) < 0)
1265 sof = (cfm >> 0) & 0x7f;
1266 sol = (cfm >> 7) & 0x7f;
1267 bsp = (long) ia64_rse_skip_regs((unsigned long *) bsp, -sof + sol);
1269 *state = (unsigned long *) bsp;
1273 # define arg_finish_change(tcp, state) 0
1277 get_arg0(struct tcb *tcp, arg_setup_state *state, long *valp)
1282 ret = upeek(tcp, PT_R11, valp);
1285 (unsigned long) ia64_rse_skip_regs(*state, 0),
1286 sizeof(long), (void *) valp);
1291 get_arg1(struct tcb *tcp, arg_setup_state *state, long *valp)
1296 ret = upeek(tcp, PT_R9, valp);
1299 (unsigned long) ia64_rse_skip_regs(*state, 1),
1300 sizeof(long), (void *) valp);
1306 set_arg0(struct tcb *tcp, arg_setup_state *state, long val)
1308 int req = PTRACE_POKEDATA;
1312 ap = (void *) (intptr_t) PT_R11; /* r11 == EBX */
1313 req = PTRACE_POKEUSER;
1315 ap = ia64_rse_skip_regs(*state, 0);
1317 ptrace(req, tcp->pid, ap, val);
1318 return errno ? -1 : 0;
1322 set_arg1(struct tcb *tcp, arg_setup_state *state, long val)
1324 int req = PTRACE_POKEDATA;
1328 ap = (void *) (intptr_t) PT_R9; /* r9 == ECX */
1329 req = PTRACE_POKEUSER;
1331 ap = ia64_rse_skip_regs(*state, 1);
1333 ptrace(req, tcp->pid, ap, val);
1334 return errno ? -1 : 0;
1337 /* ia64 does not return the input arguments from functions (and syscalls)
1338 according to ia64 RSE (Register Stack Engine) behavior. */
1340 # define restore_arg0(tcp, state, val) ((void) (state), 0)
1341 # define restore_arg1(tcp, state, val) ((void) (state), 0)
1343 # elif defined (SPARC) || defined (SPARC64)
1345 typedef struct pt_regs arg_setup_state;
1347 # define arg_setup(tcp, state) \
1348 (ptrace(PTRACE_GETREGS, tcp->pid, (char *) (state), 0))
1349 # define arg_finish_change(tcp, state) \
1350 (ptrace(PTRACE_SETREGS, tcp->pid, (char *) (state), 0))
1352 # define get_arg0(tcp, state, valp) (*(valp) = (state)->u_regs[U_REG_O0], 0)
1353 # define get_arg1(tcp, state, valp) (*(valp) = (state)->u_regs[U_REG_O1], 0)
1354 # define set_arg0(tcp, state, val) ((state)->u_regs[U_REG_O0] = (val), 0)
1355 # define set_arg1(tcp, state, val) ((state)->u_regs[U_REG_O1] = (val), 0)
1356 # define restore_arg0(tcp, state, val) 0
1358 # else /* other architectures */
1360 # if defined S390 || defined S390X
1361 /* Note: this is only true for the `clone' system call, which handles
1362 arguments specially. We could as well say that its first two arguments
1363 are swapped relative to other architectures, but that would just be
1364 another #ifdef in the calls. */
1365 # define arg0_offset PT_GPR3
1366 # define arg1_offset PT_ORIGGPR2
1367 # define restore_arg0(tcp, state, val) ((void) (state), 0)
1368 # define restore_arg1(tcp, state, val) ((void) (state), 0)
1369 # define arg0_index 1
1370 # define arg1_index 0
1371 # elif defined (ALPHA) || defined (MIPS)
1372 # define arg0_offset REG_A0
1373 # define arg1_offset (REG_A0+1)
1374 # elif defined (AVR32)
1375 # define arg0_offset (REG_R12)
1376 # define arg1_offset (REG_R11)
1377 # elif defined (POWERPC)
1378 # define arg0_offset (sizeof(unsigned long)*PT_R3)
1379 # define arg1_offset (sizeof(unsigned long)*PT_R4)
1380 # define restore_arg0(tcp, state, val) ((void) (state), 0)
1381 # elif defined (HPPA)
1382 # define arg0_offset PT_GR26
1383 # define arg1_offset (PT_GR26-4)
1384 # elif defined (X86_64)
1385 # define arg0_offset ((long)(8*(current_personality ? RBX : RDI)))
1386 # define arg1_offset ((long)(8*(current_personality ? RCX : RSI)))
1388 # define arg0_offset (4*(REG_REG0+4))
1389 # define arg1_offset (4*(REG_REG0+5))
1390 # elif defined (SH64)
1391 /* ABI defines arg0 & 1 in r2 & r3 */
1392 # define arg0_offset (REG_OFFSET+16)
1393 # define arg1_offset (REG_OFFSET+24)
1394 # define restore_arg0(tcp, state, val) 0
1395 # elif defined CRISV10 || defined CRISV32
1396 # define arg0_offset (4*PT_R11)
1397 # define arg1_offset (4*PT_ORIG_R10)
1398 # define restore_arg0(tcp, state, val) 0
1399 # define restore_arg1(tcp, state, val) 0
1400 # define arg0_index 1
1401 # define arg1_index 0
1403 # define arg0_offset 0
1404 # define arg1_offset 4
1406 # define restore_arg0(tcp, state, val) 0
1410 typedef int arg_setup_state;
1412 # define arg_setup(tcp, state) (0)
1413 # define arg_finish_change(tcp, state) 0
1414 # define get_arg0(tcp, cookie, valp) \
1415 (upeek((tcp), arg0_offset, (valp)))
1416 # define get_arg1(tcp, cookie, valp) \
1417 (upeek((tcp), arg1_offset, (valp)))
1420 set_arg0(struct tcb *tcp, void *cookie, long val)
1422 return ptrace(PTRACE_POKEUSER, tcp->pid, (char*)arg0_offset, val);
1426 set_arg1(struct tcb *tcp, void *cookie, long val)
1428 return ptrace(PTRACE_POKEUSER, tcp->pid, (char*)arg1_offset, val);
1431 # endif /* architectures */
1433 # ifndef restore_arg0
1434 # define restore_arg0(tcp, state, val) set_arg0((tcp), (state), (val))
1436 # ifndef restore_arg1
1437 # define restore_arg1(tcp, state, val) set_arg1((tcp), (state), (val))
1441 # define arg0_index 0
1442 # define arg1_index 1
1446 setbpt(struct tcb *tcp)
1448 static int clone_scno[SUPPORTED_PERSONALITIES] = { SYS_clone };
1449 arg_setup_state state;
1451 if (tcp->flags & TCB_BPTSET) {
1452 fprintf(stderr, "PANIC: TCB already set in pid %u\n", tcp->pid);
1457 * It's a silly kludge to initialize this with a search at runtime.
1458 * But it's better than maintaining another magic thing in the
1459 * godforsaken tables.
1461 if (clone_scno[current_personality] == 0) {
1463 for (i = 0; i < nsyscalls; ++i)
1464 if (sysent[i].sys_func == sys_clone) {
1465 clone_scno[current_personality] = i;
1470 switch (known_scno(tcp)) {
1477 # if defined SYS_fork || defined SYS_vfork
1478 if (arg_setup(tcp, &state) < 0
1479 || get_arg0(tcp, &state, &tcp->inst[0]) < 0
1480 || get_arg1(tcp, &state, &tcp->inst[1]) < 0
1481 || change_syscall(tcp, clone_scno[current_personality]) < 0
1482 || set_arg0(tcp, &state, CLONE_PTRACE|SIGCHLD) < 0
1483 || set_arg1(tcp, &state, 0) < 0
1484 || arg_finish_change(tcp, &state) < 0)
1486 tcp->u_arg[arg0_index] = CLONE_PTRACE|SIGCHLD;
1487 tcp->u_arg[arg1_index] = 0;
1488 tcp->flags |= TCB_BPTSET;
1496 /* ia64 calls directly `clone (CLONE_VFORK | CLONE_VM)'
1497 contrary to x86 SYS_vfork above. Even on x86 we turn the
1498 vfork semantics into plain fork - each application must not
1499 depend on the vfork specifics according to POSIX. We would
1500 hang waiting for the parent resume otherwise. We need to
1501 clear also CLONE_VM but only in the CLONE_VFORK case as
1502 otherwise we would break pthread_create. */
1504 long new_arg0 = (tcp->u_arg[arg0_index] | CLONE_PTRACE);
1505 if (new_arg0 & CLONE_VFORK)
1506 new_arg0 &= ~(unsigned long)(CLONE_VFORK | CLONE_VM);
1507 if (arg_setup(tcp, &state) < 0
1508 || set_arg0(tcp, &state, new_arg0) < 0
1509 || arg_finish_change(tcp, &state) < 0)
1511 tcp->flags |= TCB_BPTSET;
1512 tcp->inst[0] = tcp->u_arg[arg0_index];
1513 tcp->inst[1] = tcp->u_arg[arg1_index];
1517 fprintf(stderr, "PANIC: setbpt for syscall %ld on %u???\n",
1518 tcp->scno, tcp->pid);
1526 clearbpt(struct tcb *tcp)
1528 arg_setup_state state;
1529 if (arg_setup(tcp, &state) < 0
1530 || restore_arg0(tcp, &state, tcp->inst[0]) < 0
1531 || restore_arg1(tcp, &state, tcp->inst[1]) < 0
1532 || arg_finish_change(tcp, &state))
1535 tcp->flags &= ~TCB_BPTSET;
1539 # else /* !defined LINUX */
1542 setbpt(struct tcb *tcp)
1545 # ifdef SPARC /* This code is slightly sparc specific */
1548 # define BPT 0x91d02001 /* ta 1 */
1549 # define LOOP 0x10800000 /* ba 0 */
1550 # define LOOPA 0x30800000 /* ba,a 0 */
1551 # define NOP 0x01000000
1553 static int loopdeloop[1] = {LOOPA};
1555 static int loopdeloop[2] = {LOOP, NOP};
1558 if (tcp->flags & TCB_BPTSET) {
1559 fprintf(stderr, "PANIC: TCB already set in pid %u\n", tcp->pid);
1562 if (ptrace(PTRACE_GETREGS, tcp->pid, (char *)®s, 0) < 0) {
1563 perror("setbpt: ptrace(PTRACE_GETREGS, ...)");
1566 tcp->baddr = regs.r_o7 + 8;
1567 if (ptrace(PTRACE_READTEXT, tcp->pid, (char *)tcp->baddr,
1568 sizeof tcp->inst, (char *)tcp->inst) < 0) {
1569 perror("setbpt: ptrace(PTRACE_READTEXT, ...)");
1574 * XXX - BRUTAL MODE ON
1575 * We cannot set a real BPT in the child, since it will not be
1576 * traced at the moment it will reach the trap and would probably
1577 * die with a core dump.
1578 * Thus, we are force our way in by taking out two instructions
1579 * and insert an eternal loop in stead, in expectance of the SIGSTOP
1580 * generated by out PTRACE_ATTACH.
1581 * Of cause, if we evaporate ourselves in the middle of all this...
1583 if (ptrace(PTRACE_WRITETEXT, tcp->pid, (char *) tcp->baddr,
1584 sizeof loopdeloop, (char *) loopdeloop) < 0) {
1585 perror("setbpt: ptrace(PTRACE_WRITETEXT, ...)");
1588 tcp->flags |= TCB_BPTSET;
1591 # endif /* SUNOS4 */
1597 clearbpt(struct tcb *tcp)
1606 if (!(tcp->flags & TCB_BPTSET)) {
1607 fprintf(stderr, "PANIC: TCB not set in pid %u\n", tcp->pid);
1610 if (ptrace(PTRACE_WRITETEXT, tcp->pid, (char *) tcp->baddr,
1611 sizeof tcp->inst, (char *) tcp->inst) < 0) {
1612 perror("clearbtp: ptrace(PTRACE_WRITETEXT, ...)");
1615 tcp->flags &= ~TCB_BPTSET;
1619 * Since we don't have a single instruction breakpoint, we may have
1620 * to adjust the program counter after removing our `breakpoint'.
1622 if (ptrace(PTRACE_GETREGS, tcp->pid, (char *)®s, 0) < 0) {
1623 perror("clearbpt: ptrace(PTRACE_GETREGS, ...)");
1626 if ((regs.r_pc < tcp->baddr) ||
1627 (regs.r_pc > tcp->baddr + 4)) {
1628 /* The breakpoint has not been reached yet */
1631 "NOTE: PC not at bpt (pc %#x baddr %#x)\n",
1632 regs.r_pc, tcp->baddr);
1635 if (regs.r_pc != tcp->baddr)
1637 fprintf(stderr, "NOTE: PC adjusted (%#x -> %#x\n",
1638 regs.r_pc, tcp->baddr);
1640 regs.r_pc = tcp->baddr;
1641 if (ptrace(PTRACE_SETREGS, tcp->pid, (char *)®s, 0) < 0) {
1642 perror("clearbpt: ptrace(PTRACE_SETREGS, ...)");
1647 # endif /* SUNOS4 */
1652 # endif /* !defined LINUX */
1654 #endif /* !USE_PROCFS */
1660 getex(struct tcb *tcp, struct exec *hdr)
1664 for (n = 0; n < sizeof *hdr; n += 4) {
1666 if (upeek(tcp, uoff(u_exdata) + n, &res) < 0)
1668 memcpy(((char *) hdr) + n, &res, 4);
1671 fprintf(stderr, "[struct exec: magic: %o version %u Mach %o\n",
1672 hdr->a_magic, hdr->a_toolversion, hdr->a_machtype);
1673 fprintf(stderr, "Text %lu Data %lu Bss %lu Syms %lu Entry %#lx]\n",
1674 hdr->a_text, hdr->a_data, hdr->a_bss, hdr->a_syms, hdr->a_entry);
1680 fixvfork(struct tcb *tcp)
1684 * Change `vfork' in a freshly exec'ed dynamically linked
1685 * executable's (internal) symbol table to plain old `fork'
1689 struct link_dynamic dyn;
1690 struct link_dynamic_2 ld;
1693 if (getex(tcp, &hdr) < 0)
1698 if (umove(tcp, (int) N_DATADDR(hdr), &dyn) < 0) {
1699 fprintf(stderr, "Cannot read DYNAMIC\n");
1702 if (umove(tcp, (int) dyn.ld_un.ld_2, &ld) < 0) {
1703 fprintf(stderr, "Cannot read link_dynamic_2\n");
1706 if ((strtab = malloc((unsigned)ld.ld_symb_size)) == NULL) {
1707 fprintf(stderr, "out of memory\n");
1710 if (umoven(tcp, (int)ld.ld_symbols+(int)N_TXTADDR(hdr),
1711 (int)ld.ld_symb_size, strtab) < 0)
1714 for (cp = strtab; cp < strtab + ld.ld_symb_size; ) {
1715 if (strcmp(cp, "_vfork") == 0) {
1717 fprintf(stderr, "fixvfork: FOUND _vfork\n");
1718 strcpy(cp, "_fork");
1723 if (cp < strtab + ld.ld_symb_size)
1725 * Write entire symbol table back to avoid
1726 * memory alignment bugs in ptrace
1728 if (tload(pid, (int)ld.ld_symbols+(int)N_TXTADDR(hdr),
1729 (int)ld.ld_symb_size, strtab) < 0)