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 stpcpy(char *dst, const char *src)
170 while ((*dst = *src++) != '\0')
176 * Generic ptrace wrapper which tracks ESRCH errors
177 * by setting tcp->ptrace_errno to ESRCH.
179 * We assume that ESRCH indicates likely process death (SIGKILL?),
180 * modulo bugs where process somehow ended up not stopped.
181 * Unfortunately kernel uses ESRCH for that case too. Oh well.
183 * Currently used by upeek() only.
184 * TODO: use this in all other ptrace() calls while decoding.
187 do_ptrace(int request, struct tcb *tcp, void *addr, void *data)
192 l = ptrace(request, tcp->pid, addr, (long) data);
193 /* Non-ESRCH errors might be our invalid reg/mem accesses,
194 * we do not record them. */
196 tcp->ptrace_errno = ESRCH;
201 * Used when we want to unblock stopped traced process.
202 * Should be only used with PTRACE_CONT, PTRACE_DETACH and PTRACE_SYSCALL.
203 * Returns 0 on success or if error was ESRCH
204 * (presumably process was killed while we talk to it).
205 * Otherwise prints error message and returns -1.
208 ptrace_restart(int op, struct tcb *tcp, int sig)
214 ptrace(op, tcp->pid, (void *) 1, (long) sig);
216 if (!err || err == ESRCH)
219 tcp->ptrace_errno = err;
221 if (op == PTRACE_CONT)
223 if (op == PTRACE_DETACH)
225 fprintf(stderr, "strace: ptrace(PTRACE_%s,1,%d): %s\n",
226 msg, sig, strerror(err));
231 * Print entry in struct xlat table, if there.
234 printxval(const struct xlat *xlat, int val, const char *dflt)
236 const char *str = xlookup(xlat, val);
241 tprintf("%#x /* %s */", val, dflt);
246 * Print 64bit argument at position llarg and return the index of the next
250 printllval(struct tcb *tcp, const char *format, int llarg)
252 # if defined(FREEBSD) \
253 || (defined(LINUX) && defined(POWERPC) && !defined(POWERPC64)) \
254 || defined(LINUX_MIPSO32) \
255 || defined(__ARM_EABI__)
256 /* Align 64bit argument to 64bit boundary. */
257 llarg = (llarg + 1) & 0x1e;
259 # if defined LINUX && (defined X86_64 || defined POWERPC64)
260 if (current_personality == 0) {
261 tprintf(format, tcp->u_arg[llarg]);
265 /* Align 64bit argument to 64bit boundary. */
266 llarg = (llarg + 1) & 0x1e;
268 tprintf(format, LONG_LONG(tcp->u_arg[llarg], tcp->u_arg[llarg + 1]));
271 # elif defined IA64 || defined ALPHA
272 tprintf(format, tcp->u_arg[llarg]);
274 # elif defined LINUX_MIPSN32
275 tprintf(format, tcp->ext_arg[llarg]);
278 tprintf(format, LONG_LONG(tcp->u_arg[llarg], tcp->u_arg[llarg + 1]));
286 * Interpret `xlat' as an array of flags
287 * print the entries whose bits are on in `flags'
288 * return # of flags printed.
291 addflags(const struct xlat *xlat, int flags)
293 for (; xlat->str; xlat++) {
294 if (xlat->val && (flags & xlat->val) == xlat->val) {
295 tprintf("|%s", xlat->str);
300 tprintf("|%#x", flags);
305 * Interpret `xlat' as an array of flags.
306 * Print to static string the entries whose bits are on in `flags'
307 * Return static string.
310 sprintflags(const char *prefix, const struct xlat *xlat, int flags)
312 static char outstr[1024];
316 outptr = stpcpy(outstr, prefix);
318 for (; xlat->str; xlat++) {
319 if ((flags & xlat->val) == xlat->val) {
322 outptr = stpcpy(outptr, xlat->str);
330 outptr += sprintf(outptr, "%#x", flags);
337 printflags(const struct xlat *xlat, int flags, const char *dflt)
342 if (flags == 0 && xlat->val == 0) {
343 tprintf("%s", xlat->str);
348 for (n = 0; xlat->str; xlat++) {
349 if (xlat->val && (flags & xlat->val) == xlat->val) {
350 tprintf("%s%s", sep, xlat->str);
359 tprintf("%s%#x", sep, flags);
364 tprintf("%#x", flags);
366 tprintf(" /* %s */", dflt);
377 printnum(struct tcb *tcp, long addr, const char *fmt)
385 if (umove(tcp, addr, &num) < 0) {
386 tprintf("%#lx", addr);
395 printnum_int(struct tcb *tcp, long addr, const char *fmt)
403 if (umove(tcp, addr, &num) < 0) {
404 tprintf("%#lx", addr);
413 printfd(struct tcb *tcp, int fd)
417 if (show_fd_path && (p = getfdpath(tcp, fd)))
418 tprintf("%d<%s>", fd, p);
424 printuid(const char *text, unsigned long uid)
427 tprintf((uid == -1) ? "%ld" : "%lu", uid);
430 static char path[MAXPATHLEN + 1];
433 * Quote string `instr' of length `size'
434 * Write up to (3 + `size' * 4) bytes to `outstr' buffer.
435 * If `len' < 0, treat `instr' as a NUL-terminated string
436 * and quote at most (`size' - 1) bytes.
439 string_quote(const char *instr, char *outstr, int len, int size)
441 const unsigned char *ustr = (const unsigned char *) instr;
443 int usehex = 0, c, i;
448 /* Check for presence of symbol which require
449 to hex-quote the whole string. */
450 for (i = 0; i < size; ++i) {
452 /* Check for NUL-terminated string. */
456 /* Quote at most size - 1 bytes. */
460 if (!isprint(c) && !isspace(c)) {
470 /* Hex-quote the whole string. */
471 for (i = 0; i < size; ++i) {
473 /* Check for NUL-terminated string. */
477 /* Quote at most size - 1 bytes. */
481 sprintf(s, "\\x%02x", c);
485 for (i = 0; i < size; ++i) {
487 /* Check for NUL-terminated string. */
491 /* Quote at most size - 1 bytes. */
496 case '\"': case '\\':
523 else if (i + 1 < size
524 && isdigit(ustr[i + 1])) {
525 sprintf(s, "\\%03o", c);
528 sprintf(s, "\\%o", c);
539 /* Return nonzero if the string was unterminated. */
544 * Print path string specified by address `addr' and length `n'.
545 * If path length exceeds `n', append `...' to the output.
548 printpathn(struct tcb *tcp, long addr, int n)
555 /* Cap path length to the path buffer size,
556 and NUL-terminate the buffer. */
557 if (n > sizeof path - 1)
561 /* Fetch one byte more to find out whether path length > n. */
562 if (umovestr(tcp, addr, n + 1, path) < 0)
563 tprintf("%#lx", addr);
565 static char outstr[4*(sizeof path - 1) + sizeof "\"...\""];
567 int trunc = (path[n] != '\0');
571 string_quote(path, outstr, -1, n + 1);
575 tprintf(fmt, outstr);
580 printpath(struct tcb *tcp, long addr)
582 printpathn(tcp, addr, sizeof path - 1);
586 * Print string specified by address `addr' and length `len'.
587 * If `len' < 0, treat the string as a NUL-terminated string.
588 * If string length exceeds `max_strlen', append `...' to the output.
591 printstr(struct tcb *tcp, long addr, int len)
593 static char *str = NULL;
602 /* Allocate static buffers if they are not allocated yet. */
604 str = malloc(max_strlen + 1);
606 outstr = malloc(4 * max_strlen + sizeof "\"...\"");
607 if (!str || !outstr) {
608 fprintf(stderr, "out of memory\n");
609 tprintf("%#lx", addr);
615 * Treat as a NUL-terminated string: fetch one byte more
616 * because string_quote() quotes one byte less.
618 size = max_strlen + 1;
619 str[max_strlen] = '\0';
620 /* FIXME! umovestr can overwrite the '\0' stored above??? */
621 if (umovestr(tcp, addr, size, str) < 0) {
622 tprintf("%#lx", addr);
627 size = MIN(len, max_strlen);
628 if (umoven(tcp, addr, size, str) < 0) {
629 tprintf("%#lx", addr);
635 if (string_quote(str, outstr, len, size) &&
636 (len < 0 || len > max_strlen))
639 tprintf(fmt, outstr);
644 dumpiov(struct tcb *tcp, int len, long addr)
646 #if defined(LINUX) && SUPPORTED_PERSONALITIES > 1
648 struct { u_int32_t base; u_int32_t len; } *iov32;
649 struct { u_int64_t base; u_int64_t len; } *iov64;
651 #define iov iovu.iov64
653 (personality_wordsize[current_personality] == 4 \
654 ? sizeof(*iovu.iov32) : sizeof(*iovu.iov64))
655 #define iov_iov_base(i) \
656 (personality_wordsize[current_personality] == 4 \
657 ? (u_int64_t) iovu.iov32[i].base : iovu.iov64[i].base)
658 #define iov_iov_len(i) \
659 (personality_wordsize[current_personality] == 4 \
660 ? (u_int64_t) iovu.iov32[i].len : iovu.iov64[i].len)
663 #define sizeof_iov sizeof(*iov)
664 #define iov_iov_base(i) iov[i].iov_base
665 #define iov_iov_len(i) iov[i].iov_len
670 size = sizeof_iov * (unsigned long) len;
671 if (size / sizeof_iov != len
672 || (iov = malloc(size)) == NULL) {
673 fprintf(stderr, "out of memory\n");
676 if (umoven(tcp, addr, size, (char *) iov) >= 0) {
677 for (i = 0; i < len; i++) {
678 /* include the buffer number to make it easy to
679 * match up the trace with the source */
680 tprintf(" * %lu bytes in buffer %d\n",
681 (unsigned long)iov_iov_len(i), i);
682 dumpstr(tcp, (long) iov_iov_base(i),
695 dumpstr(struct tcb *tcp, long addr, int len)
697 static int strsize = -1;
698 static unsigned char *str;
699 static char outstr[80];
707 fprintf(stderr, "out of memory\n");
708 /* BUG! On next call we may use NULL str! */
714 if (umoven(tcp, addr, len, (char *) str) < 0)
717 for (i = 0; i < len; i += 16) {
719 sprintf(s, " | %05x ", i);
721 for (j = 0; j < 16; j++) {
725 sprintf(s, " %02x", str[i + j]);
729 *s++ = ' '; *s++ = ' '; *s++ = ' ';
732 *s++ = ' '; *s++ = ' ';
733 for (j = 0; j < 16; j++) {
737 if (isprint(str[i + j]))
745 tprintf("%s |\n", outstr);
749 #define PAGMASK (~(PAGSIZ - 1))
751 * move `len' bytes of data from process `pid'
752 * at address `addr' to our space at `laddr'
755 umoven(struct tcb *tcp, long addr, int len, char *laddr)
763 char x[sizeof(long)];
766 if (addr & (sizeof(long) - 1)) {
767 /* addr not a multiple of sizeof(long) */
768 n = addr - (addr & -sizeof(long)); /* residue */
769 addr &= -sizeof(long); /* residue */
771 u.val = ptrace(PTRACE_PEEKDATA, pid, (char *) addr, 0);
773 if (started && (errno==EPERM || errno==EIO)) {
774 /* Ran into 'end of memory' - stupid "printpath" */
777 /* But if not started, we had a bogus address. */
778 if (addr != 0 && errno != EIO && errno != ESRCH)
779 perror("ptrace: umoven");
783 memcpy(laddr, &u.x[n], m = MIN(sizeof(long) - n, len));
784 addr += sizeof(long), laddr += m, len -= m;
788 u.val = ptrace(PTRACE_PEEKDATA, pid, (char *) addr, 0);
790 if (started && (errno==EPERM || errno==EIO)) {
791 /* Ran into 'end of memory' - stupid "printpath" */
794 if (addr != 0 && errno != EIO && errno != ESRCH)
795 perror("ptrace: umoven");
799 memcpy(laddr, u.x, m = MIN(sizeof(long), len));
800 addr += sizeof(long), laddr += m, len -= m;
809 n = MIN(len, PAGSIZ);
810 n = MIN(n, ((addr + PAGSIZ) & PAGMASK) - addr);
811 if (ptrace(PTRACE_READDATA, pid,
812 (char *) addr, len, laddr) < 0) {
813 if (errno != ESRCH) {
814 perror("umoven: ptrace(PTRACE_READDATA, ...)");
826 #ifdef HAVE_MP_PROCFS
827 int fd = tcp->pfd_as;
831 lseek(fd, addr, SEEK_SET);
832 if (read(fd, laddr, len) == -1)
834 #endif /* USE_PROCFS */
840 * like `umove' but make the additional effort of looking
841 * for a terminating zero byte.
844 umovestr(struct tcb *tcp, long addr, int len, char *laddr)
847 #ifdef HAVE_MP_PROCFS
848 int fd = tcp->pfd_as;
852 /* Some systems (e.g. FreeBSD) can be upset if we read off the
853 end of valid memory, avoid this by trying to read up
854 to page boundaries. But we don't know what a page is (and
855 getpagesize(2) (if it exists) doesn't necessarily return
856 hardware page size). Assume all pages >= 1024 (a-historical
859 int page = 1024; /* How to find this? */
860 int move = page - (addr & (page - 1));
863 lseek(fd, addr, SEEK_SET);
868 move = read(fd, laddr, move);
870 return left != len ? 0 : -1;
871 if (memchr(laddr, 0, move))
878 #else /* !USE_PROCFS */
884 char x[sizeof(long)];
887 if (addr & (sizeof(long) - 1)) {
888 /* addr not a multiple of sizeof(long) */
889 n = addr - (addr & -sizeof(long)); /* residue */
890 addr &= -sizeof(long); /* residue */
892 u.val = ptrace(PTRACE_PEEKDATA, pid, (char *)addr, 0);
894 if (started && (errno==EPERM || errno==EIO)) {
895 /* Ran into 'end of memory' - stupid "printpath" */
898 if (addr != 0 && errno != EIO && errno != ESRCH)
903 memcpy(laddr, &u.x[n], m = MIN(sizeof(long)-n, len));
904 while (n & (sizeof(long) - 1))
905 if (u.x[n++] == '\0')
907 addr += sizeof(long), laddr += m, len -= m;
911 u.val = ptrace(PTRACE_PEEKDATA, pid, (char *)addr, 0);
913 if (started && (errno==EPERM || errno==EIO)) {
914 /* Ran into 'end of memory' - stupid "printpath" */
917 if (addr != 0 && errno != EIO && errno != ESRCH)
922 memcpy(laddr, u.x, m = MIN(sizeof(long), len));
923 for (i = 0; i < sizeof(long); i++)
927 addr += sizeof(long), laddr += m, len -= m;
929 #endif /* !USE_PROCFS */
934 # if !defined (SPARC) && !defined(SPARC64)
935 # define PTRACE_WRITETEXT 101
936 # define PTRACE_WRITEDATA 102
937 # endif /* !SPARC && !SPARC64 */
943 uload(int cmd, int pid, long addr, int len, char *laddr)
949 char x[sizeof(long)];
952 if (cmd == PTRACE_WRITETEXT) {
953 peek = PTRACE_PEEKTEXT;
954 poke = PTRACE_POKETEXT;
957 peek = PTRACE_PEEKDATA;
958 poke = PTRACE_POKEDATA;
960 if (addr & (sizeof(long) - 1)) {
961 /* addr not a multiple of sizeof(long) */
962 n = addr - (addr & -sizeof(long)); /* residue */
963 addr &= -sizeof(long);
965 u.val = ptrace(peek, pid, (char *) addr, 0);
967 perror("uload: POKE");
970 memcpy(&u.x[n], laddr, m = MIN(sizeof(long) - n, len));
971 if (ptrace(poke, pid, (char *)addr, u.val) < 0) {
972 perror("uload: POKE");
975 addr += sizeof(long), laddr += m, len -= m;
978 if (len < sizeof(long))
979 u.val = ptrace(peek, pid, (char *) addr, 0);
980 memcpy(u.x, laddr, m = MIN(sizeof(long), len));
981 if (ptrace(poke, pid, (char *) addr, u.val) < 0) {
982 perror("uload: POKE");
985 addr += sizeof(long), laddr += m, len -= m;
991 tload(int pid, int addr, int len, char *laddr)
993 return uload(PTRACE_WRITETEXT, pid, addr, len, laddr);
997 dload(int pid, int addr, int len, char *laddr)
999 return uload(PTRACE_WRITEDATA, pid, addr, len, laddr);
1007 upeek(struct tcb *tcp, long off, long *res)
1011 # ifdef SUNOS4_KERNEL_ARCH_KLUDGE
1013 static int is_sun4m = -1;
1014 struct utsname name;
1016 /* Round up the usual suspects. */
1017 if (is_sun4m == -1) {
1018 if (uname(&name) < 0) {
1019 perror("upeek: uname?");
1022 is_sun4m = strcmp(name.machine, "sun4m") == 0;
1024 const struct xlat *x;
1026 for (x = struct_user_offsets; x->str; x++)
1033 # endif /* SUNOS4_KERNEL_ARCH_KLUDGE */
1035 val = do_ptrace(PTRACE_PEEKUSER, tcp, (char *) off, 0);
1036 if (val == -1 && errno) {
1037 if (errno != ESRCH) {
1039 sprintf(buf, "upeek: ptrace(PTRACE_PEEKUSER,%d,%lu,0)", tcp->pid, off);
1048 #endif /* !USE_PROCFS */
1051 printcall(struct tcb *tcp)
1053 #define PRINTBADPC tprintf(sizeof(long) == 4 ? "[????????] " : \
1054 sizeof(long) == 8 ? "[????????????????] " : \
1061 if (upeek(tcp, 4*EIP, &eip) < 0) {
1065 tprintf("[%08lx] ", eip);
1067 # elif defined(S390) || defined(S390X)
1069 if (upeek(tcp, PT_PSWADDR, &psw) < 0) {
1074 tprintf("[%08lx] ", psw);
1076 tprintf("[%16lx] ", psw);
1079 # elif defined(X86_64)
1082 if (upeek(tcp, 8*RIP, &rip) < 0) {
1086 tprintf("[%16lx] ", rip);
1087 # elif defined(IA64)
1090 if (upeek(tcp, PT_B0, &ip) < 0) {
1094 tprintf("[%08lx] ", ip);
1095 # elif defined(POWERPC)
1098 if (upeek(tcp, sizeof(unsigned long)*PT_NIP, &pc) < 0) {
1103 tprintf("[%016lx] ", pc);
1105 tprintf("[%08lx] ", pc);
1107 # elif defined(M68K)
1110 if (upeek(tcp, 4*PT_PC, &pc) < 0) {
1111 tprintf("[????????] ");
1114 tprintf("[%08lx] ", pc);
1115 # elif defined(ALPHA)
1118 if (upeek(tcp, REG_PC, &pc) < 0) {
1119 tprintf("[????????????????] ");
1122 tprintf("[%08lx] ", pc);
1123 # elif defined(SPARC) || defined(SPARC64)
1124 struct pt_regs regs;
1125 if (ptrace(PTRACE_GETREGS, tcp->pid, (char *)®s, 0) < 0) {
1129 # if defined(SPARC64)
1130 tprintf("[%08lx] ", regs.tpc);
1132 tprintf("[%08lx] ", regs.pc);
1134 # elif defined(HPPA)
1137 if (upeek(tcp, PT_IAOQ0, &pc) < 0) {
1138 tprintf("[????????] ");
1141 tprintf("[%08lx] ", pc);
1142 # elif defined(MIPS)
1145 if (upeek(tcp, REG_EPC, &pc) < 0) {
1146 tprintf("[????????] ");
1149 tprintf("[%08lx] ", pc);
1153 if (upeek(tcp, 4*REG_PC, &pc) < 0) {
1154 tprintf("[????????] ");
1157 tprintf("[%08lx] ", pc);
1158 # elif defined(SH64)
1161 if (upeek(tcp, REG_PC, &pc) < 0) {
1162 tprintf("[????????????????] ");
1165 tprintf("[%08lx] ", pc);
1169 if (upeek(tcp, 4*15, &pc) < 0) {
1173 tprintf("[%08lx] ", pc);
1174 # elif defined(AVR32)
1177 if (upeek(tcp, REG_PC, &pc) < 0) {
1178 tprintf("[????????] ");
1181 tprintf("[%08lx] ", pc);
1182 # elif defined(BFIN)
1185 if (upeek(tcp, PT_PC, &pc) < 0) {
1189 tprintf("[%08lx] ", pc);
1190 #elif defined(CRISV10)
1193 if (upeek(tcp, 4*PT_IRP, &pc) < 0) {
1197 tprintf("[%08lx] ", pc);
1198 #elif defined(CRISV32)
1201 if (upeek(tcp, 4*PT_ERP, &pc) < 0) {
1205 tprintf("[%08lx] ", pc);
1206 # endif /* architecture */
1212 if (ptrace(PTRACE_GETREGS, tcp->pid, (char *) ®s, 0) < 0) {
1213 perror("printcall: ptrace(PTRACE_GETREGS, ...)");
1217 tprintf("[%08x] ", regs.r_o7);
1227 pread(tcp->pfd_reg, ®s, sizeof(regs), 0);
1228 tprintf("[%08x] ", regs.r_eip);
1229 #endif /* FREEBSD */
1234 * These #if's are huge, please indent them correctly.
1235 * It's easy to get confused otherwise.
1241 # include "syscall.h"
1243 # include <sys/syscall.h>
1244 # ifndef CLONE_PTRACE
1245 # define CLONE_PTRACE 0x00002000
1247 # ifndef CLONE_VFORK
1248 # define CLONE_VFORK 0x00004000
1251 # define CLONE_VM 0x00000100
1253 # ifndef CLONE_STOPPED
1254 # define CLONE_STOPPED 0x02000000
1259 /* We don't have fork()/vfork() syscalls on ia64 itself, but the ia32
1260 subsystem has them for x86... */
1262 # define SYS_vfork 190
1264 typedef unsigned long *arg_setup_state;
1267 arg_setup(struct tcb *tcp, arg_setup_state *state)
1269 unsigned long cfm, sof, sol;
1273 /* Satisfy a false GCC warning. */
1278 if (upeek(tcp, PT_AR_BSP, &bsp) < 0)
1280 if (upeek(tcp, PT_CFM, (long *) &cfm) < 0)
1283 sof = (cfm >> 0) & 0x7f;
1284 sol = (cfm >> 7) & 0x7f;
1285 bsp = (long) ia64_rse_skip_regs((unsigned long *) bsp, -sof + sol);
1287 *state = (unsigned long *) bsp;
1291 # define arg_finish_change(tcp, state) 0
1295 get_arg0(struct tcb *tcp, arg_setup_state *state, long *valp)
1300 ret = upeek(tcp, PT_R11, valp);
1303 (unsigned long) ia64_rse_skip_regs(*state, 0),
1304 sizeof(long), (void *) valp);
1309 get_arg1(struct tcb *tcp, arg_setup_state *state, long *valp)
1314 ret = upeek(tcp, PT_R9, valp);
1317 (unsigned long) ia64_rse_skip_regs(*state, 1),
1318 sizeof(long), (void *) valp);
1324 set_arg0(struct tcb *tcp, arg_setup_state *state, long val)
1326 int req = PTRACE_POKEDATA;
1330 ap = (void *) (intptr_t) PT_R11; /* r11 == EBX */
1331 req = PTRACE_POKEUSER;
1333 ap = ia64_rse_skip_regs(*state, 0);
1335 ptrace(req, tcp->pid, ap, val);
1336 return errno ? -1 : 0;
1340 set_arg1(struct tcb *tcp, arg_setup_state *state, long val)
1342 int req = PTRACE_POKEDATA;
1346 ap = (void *) (intptr_t) PT_R9; /* r9 == ECX */
1347 req = PTRACE_POKEUSER;
1349 ap = ia64_rse_skip_regs(*state, 1);
1351 ptrace(req, tcp->pid, ap, val);
1352 return errno ? -1 : 0;
1355 /* ia64 does not return the input arguments from functions (and syscalls)
1356 according to ia64 RSE (Register Stack Engine) behavior. */
1358 # define restore_arg0(tcp, state, val) ((void) (state), 0)
1359 # define restore_arg1(tcp, state, val) ((void) (state), 0)
1361 # elif defined (SPARC) || defined (SPARC64)
1363 typedef struct pt_regs arg_setup_state;
1365 # define arg_setup(tcp, state) \
1366 (ptrace(PTRACE_GETREGS, tcp->pid, (char *) (state), 0))
1367 # define arg_finish_change(tcp, state) \
1368 (ptrace(PTRACE_SETREGS, tcp->pid, (char *) (state), 0))
1370 # define get_arg0(tcp, state, valp) (*(valp) = (state)->u_regs[U_REG_O0], 0)
1371 # define get_arg1(tcp, state, valp) (*(valp) = (state)->u_regs[U_REG_O1], 0)
1372 # define set_arg0(tcp, state, val) ((state)->u_regs[U_REG_O0] = (val), 0)
1373 # define set_arg1(tcp, state, val) ((state)->u_regs[U_REG_O1] = (val), 0)
1374 # define restore_arg0(tcp, state, val) 0
1376 # else /* other architectures */
1378 # if defined S390 || defined S390X
1379 /* Note: this is only true for the `clone' system call, which handles
1380 arguments specially. We could as well say that its first two arguments
1381 are swapped relative to other architectures, but that would just be
1382 another #ifdef in the calls. */
1383 # define arg0_offset PT_GPR3
1384 # define arg1_offset PT_ORIGGPR2
1385 # define restore_arg0(tcp, state, val) ((void) (state), 0)
1386 # define restore_arg1(tcp, state, val) ((void) (state), 0)
1387 # define arg0_index 1
1388 # define arg1_index 0
1389 # elif defined (ALPHA) || defined (MIPS)
1390 # define arg0_offset REG_A0
1391 # define arg1_offset (REG_A0+1)
1392 # elif defined (AVR32)
1393 # define arg0_offset (REG_R12)
1394 # define arg1_offset (REG_R11)
1395 # elif defined (POWERPC)
1396 # define arg0_offset (sizeof(unsigned long)*PT_R3)
1397 # define arg1_offset (sizeof(unsigned long)*PT_R4)
1398 # define restore_arg0(tcp, state, val) ((void) (state), 0)
1399 # elif defined (HPPA)
1400 # define arg0_offset PT_GR26
1401 # define arg1_offset (PT_GR26-4)
1402 # elif defined (X86_64)
1403 # define arg0_offset ((long)(8*(current_personality ? RBX : RDI)))
1404 # define arg1_offset ((long)(8*(current_personality ? RCX : RSI)))
1406 # define arg0_offset (4*(REG_REG0+4))
1407 # define arg1_offset (4*(REG_REG0+5))
1408 # elif defined (SH64)
1409 /* ABI defines arg0 & 1 in r2 & r3 */
1410 # define arg0_offset (REG_OFFSET+16)
1411 # define arg1_offset (REG_OFFSET+24)
1412 # define restore_arg0(tcp, state, val) 0
1413 # elif defined CRISV10 || defined CRISV32
1414 # define arg0_offset (4*PT_R11)
1415 # define arg1_offset (4*PT_ORIG_R10)
1416 # define restore_arg0(tcp, state, val) 0
1417 # define restore_arg1(tcp, state, val) 0
1418 # define arg0_index 1
1419 # define arg1_index 0
1421 # define arg0_offset 0
1422 # define arg1_offset 4
1424 # define restore_arg0(tcp, state, val) 0
1428 typedef int arg_setup_state;
1430 # define arg_setup(tcp, state) (0)
1431 # define arg_finish_change(tcp, state) 0
1432 # define get_arg0(tcp, cookie, valp) \
1433 (upeek((tcp), arg0_offset, (valp)))
1434 # define get_arg1(tcp, cookie, valp) \
1435 (upeek((tcp), arg1_offset, (valp)))
1438 set_arg0(struct tcb *tcp, void *cookie, long val)
1440 return ptrace(PTRACE_POKEUSER, tcp->pid, (char*)arg0_offset, val);
1444 set_arg1(struct tcb *tcp, void *cookie, long val)
1446 return ptrace(PTRACE_POKEUSER, tcp->pid, (char*)arg1_offset, val);
1449 # endif /* architectures */
1451 # ifndef restore_arg0
1452 # define restore_arg0(tcp, state, val) set_arg0((tcp), (state), (val))
1454 # ifndef restore_arg1
1455 # define restore_arg1(tcp, state, val) set_arg1((tcp), (state), (val))
1459 # define arg0_index 0
1460 # define arg1_index 1
1464 setbpt(struct tcb *tcp)
1466 static int clone_scno[SUPPORTED_PERSONALITIES] = { SYS_clone };
1467 arg_setup_state state;
1469 if (tcp->flags & TCB_BPTSET) {
1470 fprintf(stderr, "PANIC: TCB already set in pid %u\n", tcp->pid);
1475 * It's a silly kludge to initialize this with a search at runtime.
1476 * But it's better than maintaining another magic thing in the
1477 * godforsaken tables.
1479 if (clone_scno[current_personality] == 0) {
1481 for (i = 0; i < nsyscalls; ++i)
1482 if (sysent[i].sys_func == sys_clone) {
1483 clone_scno[current_personality] = i;
1488 switch (known_scno(tcp)) {
1495 # if defined SYS_fork || defined SYS_vfork
1496 if (arg_setup(tcp, &state) < 0
1497 || get_arg0(tcp, &state, &tcp->inst[0]) < 0
1498 || get_arg1(tcp, &state, &tcp->inst[1]) < 0
1499 || change_syscall(tcp, clone_scno[current_personality]) < 0
1500 || set_arg0(tcp, &state, CLONE_PTRACE|SIGCHLD) < 0
1501 || set_arg1(tcp, &state, 0) < 0
1502 || arg_finish_change(tcp, &state) < 0)
1504 tcp->u_arg[arg0_index] = CLONE_PTRACE|SIGCHLD;
1505 tcp->u_arg[arg1_index] = 0;
1506 tcp->flags |= TCB_BPTSET;
1514 /* ia64 calls directly `clone (CLONE_VFORK | CLONE_VM)'
1515 contrary to x86 SYS_vfork above. Even on x86 we turn the
1516 vfork semantics into plain fork - each application must not
1517 depend on the vfork specifics according to POSIX. We would
1518 hang waiting for the parent resume otherwise. We need to
1519 clear also CLONE_VM but only in the CLONE_VFORK case as
1520 otherwise we would break pthread_create. */
1522 long new_arg0 = (tcp->u_arg[arg0_index] | CLONE_PTRACE);
1523 if (new_arg0 & CLONE_VFORK)
1524 new_arg0 &= ~(unsigned long)(CLONE_VFORK | CLONE_VM);
1525 if (arg_setup(tcp, &state) < 0
1526 || set_arg0(tcp, &state, new_arg0) < 0
1527 || arg_finish_change(tcp, &state) < 0)
1529 tcp->flags |= TCB_BPTSET;
1530 tcp->inst[0] = tcp->u_arg[arg0_index];
1531 tcp->inst[1] = tcp->u_arg[arg1_index];
1535 fprintf(stderr, "PANIC: setbpt for syscall %ld on %u???\n",
1536 tcp->scno, tcp->pid);
1544 clearbpt(struct tcb *tcp)
1546 arg_setup_state state;
1547 if (arg_setup(tcp, &state) < 0
1548 || restore_arg0(tcp, &state, tcp->inst[0]) < 0
1549 || restore_arg1(tcp, &state, tcp->inst[1]) < 0
1550 || arg_finish_change(tcp, &state))
1553 tcp->flags &= ~TCB_BPTSET;
1557 # else /* !defined LINUX */
1560 setbpt(struct tcb *tcp)
1563 # ifdef SPARC /* This code is slightly sparc specific */
1566 # define BPT 0x91d02001 /* ta 1 */
1567 # define LOOP 0x10800000 /* ba 0 */
1568 # define LOOPA 0x30800000 /* ba,a 0 */
1569 # define NOP 0x01000000
1571 static int loopdeloop[1] = {LOOPA};
1573 static int loopdeloop[2] = {LOOP, NOP};
1576 if (tcp->flags & TCB_BPTSET) {
1577 fprintf(stderr, "PANIC: TCB already set in pid %u\n", tcp->pid);
1580 if (ptrace(PTRACE_GETREGS, tcp->pid, (char *)®s, 0) < 0) {
1581 perror("setbpt: ptrace(PTRACE_GETREGS, ...)");
1584 tcp->baddr = regs.r_o7 + 8;
1585 if (ptrace(PTRACE_READTEXT, tcp->pid, (char *)tcp->baddr,
1586 sizeof tcp->inst, (char *)tcp->inst) < 0) {
1587 perror("setbpt: ptrace(PTRACE_READTEXT, ...)");
1592 * XXX - BRUTAL MODE ON
1593 * We cannot set a real BPT in the child, since it will not be
1594 * traced at the moment it will reach the trap and would probably
1595 * die with a core dump.
1596 * Thus, we are force our way in by taking out two instructions
1597 * and insert an eternal loop in stead, in expectance of the SIGSTOP
1598 * generated by out PTRACE_ATTACH.
1599 * Of cause, if we evaporate ourselves in the middle of all this...
1601 if (ptrace(PTRACE_WRITETEXT, tcp->pid, (char *) tcp->baddr,
1602 sizeof loopdeloop, (char *) loopdeloop) < 0) {
1603 perror("setbpt: ptrace(PTRACE_WRITETEXT, ...)");
1606 tcp->flags |= TCB_BPTSET;
1609 # endif /* SUNOS4 */
1615 clearbpt(struct tcb *tcp)
1624 if (!(tcp->flags & TCB_BPTSET)) {
1625 fprintf(stderr, "PANIC: TCB not set in pid %u\n", tcp->pid);
1628 if (ptrace(PTRACE_WRITETEXT, tcp->pid, (char *) tcp->baddr,
1629 sizeof tcp->inst, (char *) tcp->inst) < 0) {
1630 perror("clearbtp: ptrace(PTRACE_WRITETEXT, ...)");
1633 tcp->flags &= ~TCB_BPTSET;
1637 * Since we don't have a single instruction breakpoint, we may have
1638 * to adjust the program counter after removing our `breakpoint'.
1640 if (ptrace(PTRACE_GETREGS, tcp->pid, (char *)®s, 0) < 0) {
1641 perror("clearbpt: ptrace(PTRACE_GETREGS, ...)");
1644 if ((regs.r_pc < tcp->baddr) ||
1645 (regs.r_pc > tcp->baddr + 4)) {
1646 /* The breakpoint has not been reached yet */
1649 "NOTE: PC not at bpt (pc %#x baddr %#x)\n",
1650 regs.r_pc, tcp->baddr);
1653 if (regs.r_pc != tcp->baddr)
1655 fprintf(stderr, "NOTE: PC adjusted (%#x -> %#x\n",
1656 regs.r_pc, tcp->baddr);
1658 regs.r_pc = tcp->baddr;
1659 if (ptrace(PTRACE_SETREGS, tcp->pid, (char *)®s, 0) < 0) {
1660 perror("clearbpt: ptrace(PTRACE_SETREGS, ...)");
1665 # endif /* SUNOS4 */
1670 # endif /* !defined LINUX */
1672 #endif /* !USE_PROCFS */
1678 getex(struct tcb *tcp, struct exec *hdr)
1682 for (n = 0; n < sizeof *hdr; n += 4) {
1684 if (upeek(tcp, uoff(u_exdata) + n, &res) < 0)
1686 memcpy(((char *) hdr) + n, &res, 4);
1689 fprintf(stderr, "[struct exec: magic: %o version %u Mach %o\n",
1690 hdr->a_magic, hdr->a_toolversion, hdr->a_machtype);
1691 fprintf(stderr, "Text %lu Data %lu Bss %lu Syms %lu Entry %#lx]\n",
1692 hdr->a_text, hdr->a_data, hdr->a_bss, hdr->a_syms, hdr->a_entry);
1698 fixvfork(struct tcb *tcp)
1702 * Change `vfork' in a freshly exec'ed dynamically linked
1703 * executable's (internal) symbol table to plain old `fork'
1707 struct link_dynamic dyn;
1708 struct link_dynamic_2 ld;
1711 if (getex(tcp, &hdr) < 0)
1716 if (umove(tcp, (int) N_DATADDR(hdr), &dyn) < 0) {
1717 fprintf(stderr, "Cannot read DYNAMIC\n");
1720 if (umove(tcp, (int) dyn.ld_un.ld_2, &ld) < 0) {
1721 fprintf(stderr, "Cannot read link_dynamic_2\n");
1724 strtab = malloc((unsigned)ld.ld_symb_size);
1725 if (strtab == NULL) {
1726 fprintf(stderr, "out of memory\n");
1729 if (umoven(tcp, (int)ld.ld_symbols+(int)N_TXTADDR(hdr),
1730 (int)ld.ld_symb_size, strtab) < 0)
1733 for (cp = strtab; cp < strtab + ld.ld_symb_size; ) {
1734 if (strcmp(cp, "_vfork") == 0) {
1736 fprintf(stderr, "fixvfork: FOUND _vfork\n");
1737 strcpy(cp, "_fork");
1742 if (cp < strtab + ld.ld_symb_size)
1744 * Write entire symbol table back to avoid
1745 * memory alignment bugs in ptrace
1747 if (tload(pid, (int)ld.ld_symbols+(int)N_TXTADDR(hdr),
1748 (int)ld.ld_symb_size, strtab) < 0)