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.
36 #include <sys/param.h>
42 #if __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 1)
43 # include <linux/ptrace.h>
47 # include <asm/ptrace_offsets.h>
53 # define PTRACE_PEEKUSR PTRACE_PEEKUSER
54 #elif defined(HAVE_LINUX_PTRACE_H)
55 # undef PTRACE_SYSCALL
56 # ifdef HAVE_STRUCT_IA64_FPREG
57 # define ia64_fpreg XXX_ia64_fpreg
59 # ifdef HAVE_STRUCT_PT_ALL_USER_REGS
60 # define pt_all_user_regs XXX_pt_all_user_regs
62 # include <linux/ptrace.h>
64 # undef pt_all_user_regs
68 # undef PTRACE_GETREGS
69 # define PTRACE_GETREGS PTRACE_GETREGS64
70 # undef PTRACE_SETREGS
71 # define PTRACE_SETREGS PTRACE_SETREGS64
76 # define MAX(a,b) (((a) > (b)) ? (a) : (b))
79 # define MIN(a,b) (((a) < (b)) ? (a) : (b))
83 string_to_uint(const char *str)
91 value = strtol(str, &error, 10);
92 if (errno || *error || value < 0 || (long)(int)value != value)
98 tv_nz(struct timeval *a)
100 return a->tv_sec || a->tv_usec;
104 tv_cmp(struct timeval *a, struct timeval *b)
106 if (a->tv_sec < b->tv_sec
107 || (a->tv_sec == b->tv_sec && a->tv_usec < b->tv_usec))
109 if (a->tv_sec > b->tv_sec
110 || (a->tv_sec == b->tv_sec && a->tv_usec > b->tv_usec))
116 tv_float(struct timeval *tv)
118 return tv->tv_sec + tv->tv_usec/1000000.0;
122 tv_add(struct timeval *tv, struct timeval *a, struct timeval *b)
124 tv->tv_sec = a->tv_sec + b->tv_sec;
125 tv->tv_usec = a->tv_usec + b->tv_usec;
126 if (tv->tv_usec >= 1000000) {
128 tv->tv_usec -= 1000000;
133 tv_sub(struct timeval *tv, struct timeval *a, struct timeval *b)
135 tv->tv_sec = a->tv_sec - b->tv_sec;
136 tv->tv_usec = a->tv_usec - b->tv_usec;
137 if (((long) tv->tv_usec) < 0) {
139 tv->tv_usec += 1000000;
144 tv_div(struct timeval *tv, struct timeval *a, int n)
146 tv->tv_usec = (a->tv_sec % n * 1000000 + a->tv_usec + n / 2) / n;
147 tv->tv_sec = a->tv_sec / n + tv->tv_usec / 1000000;
148 tv->tv_usec %= 1000000;
152 tv_mul(struct timeval *tv, struct timeval *a, int n)
154 tv->tv_usec = a->tv_usec * n;
155 tv->tv_sec = a->tv_sec * n + tv->tv_usec / 1000000;
156 tv->tv_usec %= 1000000;
160 xlookup(const struct xlat *xlat, int val)
162 for (; xlat->str != NULL; xlat++)
163 if (xlat->val == val)
168 #if !defined HAVE_STPCPY
170 stpcpy(char *dst, const char *src)
172 while ((*dst = *src++) != '\0')
179 * Print entry in struct xlat table, if there.
182 printxval(const struct xlat *xlat, int val, const char *dflt)
184 const char *str = xlookup(xlat, val);
189 tprintf("%#x /* %s */", val, dflt);
194 * Print 64bit argument at position llarg and return the index of the next
198 printllval(struct tcb *tcp, const char *format, int llarg)
200 # if defined(X86_64) || defined(POWERPC64)
201 if (current_personality == 0) {
202 tprintf(format, tcp->u_arg[llarg]);
206 /* Align 64bit argument to 64bit boundary. */
207 llarg = (llarg + 1) & 0x1e;
209 tprintf(format, LONG_LONG(tcp->u_arg[llarg], tcp->u_arg[llarg + 1]));
212 # elif defined IA64 || defined ALPHA
213 tprintf(format, tcp->u_arg[llarg]);
215 # elif defined LINUX_MIPSN32
216 tprintf(format, tcp->ext_arg[llarg]);
219 tprintf(format, LONG_LONG(tcp->u_arg[llarg], tcp->u_arg[llarg + 1]));
227 * Interpret `xlat' as an array of flags
228 * print the entries whose bits are on in `flags'
229 * return # of flags printed.
232 addflags(const struct xlat *xlat, int flags)
234 for (; xlat->str; xlat++) {
235 if (xlat->val && (flags & xlat->val) == xlat->val) {
236 tprintf("|%s", xlat->str);
241 tprintf("|%#x", flags);
246 * Interpret `xlat' as an array of flags.
247 * Print to static string the entries whose bits are on in `flags'
248 * Return static string.
251 sprintflags(const char *prefix, const struct xlat *xlat, int flags)
253 static char outstr[1024];
257 outptr = stpcpy(outstr, prefix);
259 for (; xlat->str; xlat++) {
260 if ((flags & xlat->val) == xlat->val) {
263 outptr = stpcpy(outptr, xlat->str);
273 outptr += sprintf(outptr, "%#x", flags);
280 printflags(const struct xlat *xlat, int flags, const char *dflt)
285 if (flags == 0 && xlat->val == 0) {
291 for (n = 0; xlat->str; xlat++) {
292 if (xlat->val && (flags & xlat->val) == xlat->val) {
293 tprintf("%s%s", sep, xlat->str);
302 tprintf("%s%#x", sep, flags);
307 tprintf("%#x", flags);
309 tprintf(" /* %s */", dflt);
320 printnum(struct tcb *tcp, long addr, const char *fmt)
328 if (umove(tcp, addr, &num) < 0) {
329 tprintf("%#lx", addr);
338 printnum_int(struct tcb *tcp, long addr, const char *fmt)
346 if (umove(tcp, addr, &num) < 0) {
347 tprintf("%#lx", addr);
356 printfd(struct tcb *tcp, int fd)
360 if (show_fd_path && (p = getfdpath(tcp, fd)))
361 tprintf("%d<%s>", fd, p);
367 printuid(const char *text, unsigned long uid)
369 tprintf((uid == -1) ? "%s%ld" : "%s%lu", text, uid);
373 * Quote string `instr' of length `size'
374 * Write up to (3 + `size' * 4) bytes to `outstr' buffer.
375 * If `len' < 0, treat `instr' as a NUL-terminated string
376 * and quote at most (`size' - 1) bytes.
378 * Returns 0 if len < 0 and NUL was seen, 1 otherwise.
379 * Note that if len >= 0, always returns 1.
382 string_quote(const char *instr, char *outstr, int len, int size)
384 const unsigned char *ustr = (const unsigned char *) instr;
386 int usehex, c, i, eol;
388 eol = 0x100; /* this can never match a char */
398 /* Check for presence of symbol which require
399 to hex-quote the whole string. */
400 for (i = 0; i < size; ++i) {
402 /* Check for NUL-terminated string. */
405 if (!isprint(c) && !isspace(c)) {
415 /* Hex-quote the whole string. */
416 for (i = 0; i < size; ++i) {
418 /* Check for NUL-terminated string. */
423 *s++ = "0123456789abcdef"[c >> 4];
424 *s++ = "0123456789abcdef"[c & 0xf];
427 for (i = 0; i < size; ++i) {
429 /* Check for NUL-terminated string. */
433 case '\"': case '\\':
464 && ustr[i + 1] >= '0'
465 && ustr[i + 1] <= '9'
468 *s++ = '0' + (c >> 6);
469 *s++ = '0' + ((c >> 3) & 0x7);
474 *s++ = '0' + (c >> 6);
475 *s++ = '0' + ((c >> 3) & 0x7);
478 *s++ = '0' + (c & 0x7);
488 /* Return zero if we printed entire ASCIZ string (didn't truncate it) */
489 if (len < 0 && ustr[i] == '\0') {
490 /* We didn't see NUL yet (otherwise we'd jump to 'asciz_ended')
491 * but next char is NUL.
501 /* Return zero: we printed entire ASCIZ string (didn't truncate it) */
506 * Print path string specified by address `addr' and length `n'.
507 * If path length exceeds `n', append `...' to the output.
510 printpathn(struct tcb *tcp, long addr, int n)
512 char path[MAXPATHLEN + 1];
520 /* Cap path length to the path buffer size */
521 if (n > sizeof path - 1)
524 /* Fetch one byte more to find out whether path length > n. */
525 nul_seen = umovestr(tcp, addr, n + 1, path);
527 tprintf("%#lx", addr);
533 outstr = alloca(4 * n); /* 4*(n-1) + 3 for quotes and NUL */
534 string_quote(path, outstr, -1, n);
542 printpath(struct tcb *tcp, long addr)
544 /* Size must correspond to char path[] size in printpathn */
545 printpathn(tcp, addr, MAXPATHLEN);
549 * Print string specified by address `addr' and length `len'.
550 * If `len' < 0, treat the string as a NUL-terminated string.
551 * If string length exceeds `max_strlen', append `...' to the output.
554 printstr(struct tcb *tcp, long addr, int len)
556 static char *str = NULL;
565 /* Allocate static buffers if they are not allocated yet. */
567 str = malloc(max_strlen + 1);
570 outstr = malloc(4 * max_strlen + /*for quotes and NUL:*/ 3);
577 * Treat as a NUL-terminated string: fetch one byte more
578 * because string_quote() quotes one byte less.
580 size = max_strlen + 1;
581 if (umovestr(tcp, addr, size, str) < 0) {
582 tprintf("%#lx", addr);
587 size = MIN(len, max_strlen);
588 if (umoven(tcp, addr, size, str) < 0) {
589 tprintf("%#lx", addr);
594 /* If string_quote didn't see NUL and (it was supposed to be ASCIZ str
595 * or we were requested to print more than -s NUM chars)...
597 ellipsis = (string_quote(str, outstr, len, size) &&
598 (len < 0 || len > max_strlen));
607 dumpiov(struct tcb *tcp, int len, long addr)
609 #if SUPPORTED_PERSONALITIES > 1
611 struct { u_int32_t base; u_int32_t len; } *iov32;
612 struct { u_int64_t base; u_int64_t len; } *iov64;
614 #define iov iovu.iov64
616 (current_wordsize == 4 ? sizeof(*iovu.iov32) : sizeof(*iovu.iov64))
617 #define iov_iov_base(i) \
618 (current_wordsize == 4 ? (uint64_t) iovu.iov32[i].base : iovu.iov64[i].base)
619 #define iov_iov_len(i) \
620 (current_wordsize == 4 ? (uint64_t) iovu.iov32[i].len : iovu.iov64[i].len)
623 #define sizeof_iov sizeof(*iov)
624 #define iov_iov_base(i) iov[i].iov_base
625 #define iov_iov_len(i) iov[i].iov_len
630 size = sizeof_iov * len;
631 /* Assuming no sane program has millions of iovs */
632 if ((unsigned)len > 1024*1024 /* insane or negative size? */
633 || (iov = malloc(size)) == NULL) {
634 fprintf(stderr, "Out of memory\n");
637 if (umoven(tcp, addr, size, (char *) iov) >= 0) {
638 for (i = 0; i < len; i++) {
639 /* include the buffer number to make it easy to
640 * match up the trace with the source */
641 tprintf(" * %lu bytes in buffer %d\n",
642 (unsigned long)iov_iov_len(i), i);
643 dumpstr(tcp, (long) iov_iov_base(i),
656 dumpstr(struct tcb *tcp, long addr, int len)
658 static int strsize = -1;
659 static unsigned char *str;
668 fprintf(stderr, "Out of memory\n");
674 if (umoven(tcp, addr, len, (char *) str) < 0)
677 for (i = 0; i < len; i += 16) {
681 sprintf(s, " | %05x ", i);
683 for (j = 0; j < 16; j++) {
687 sprintf(s, " %02x", str[i + j]);
691 *s++ = ' '; *s++ = ' '; *s++ = ' ';
694 *s++ = ' '; *s++ = ' ';
695 for (j = 0; j < 16; j++) {
699 if (isprint(str[i + j]))
707 tprintf("%s |\n", outstr);
711 #ifdef HAVE_PROCESS_VM_READV
712 /* C library supports this, but the kernel might not. */
713 static bool process_vm_readv_not_supported = 0;
716 /* Need to do this since process_vm_readv() is not yet available in libc.
717 * When libc is be updated, only "static bool process_vm_readv_not_supported"
718 * line should remain.
720 #if !defined(__NR_process_vm_readv)
722 # define __NR_process_vm_readv 347
723 # elif defined(X86_64)
724 # define __NR_process_vm_readv 310
725 # elif defined(POWERPC)
726 # define __NR_process_vm_readv 351
730 #if defined(__NR_process_vm_readv)
731 static bool process_vm_readv_not_supported = 0;
732 static ssize_t process_vm_readv(pid_t pid,
733 const struct iovec *lvec,
734 unsigned long liovcnt,
735 const struct iovec *rvec,
736 unsigned long riovcnt,
739 return syscall(__NR_process_vm_readv, (long)pid, lvec, liovcnt, rvec, riovcnt, flags);
742 static bool process_vm_readv_not_supported = 1;
743 # define process_vm_readv(...) (errno = ENOSYS, -1)
746 #endif /* end of hack */
748 #define PAGMASK (~(PAGSIZ - 1))
750 * move `len' bytes of data from process `pid'
751 * at address `addr' to our space at `laddr'
754 umoven(struct tcb *tcp, long addr, int len, char *laddr)
761 char x[sizeof(long)];
764 #if SUPPORTED_PERSONALITIES > 1
765 if (current_wordsize < sizeof(addr))
766 addr &= (1ul << 8 * current_wordsize) - 1;
769 if (!process_vm_readv_not_supported) {
770 struct iovec local[1], remote[1];
773 local[0].iov_base = laddr;
774 remote[0].iov_base = (void*)addr;
775 local[0].iov_len = remote[0].iov_len = len;
776 r = process_vm_readv(pid,
783 process_vm_readv_not_supported = 1;
784 else if (errno != EINVAL) /* EINVAL is seen if process is gone */
786 perror("process_vm_readv");
787 goto vm_readv_didnt_work;
794 if (addr & (sizeof(long) - 1)) {
795 /* addr not a multiple of sizeof(long) */
796 n = addr - (addr & -sizeof(long)); /* residue */
797 addr &= -sizeof(long); /* residue */
799 u.val = ptrace(PTRACE_PEEKDATA, pid, (char *) addr, 0);
801 /* But if not started, we had a bogus address. */
802 if (addr != 0 && errno != EIO && errno != ESRCH)
803 perror_msg("umoven: PTRACE_PEEKDATA pid:%d @0x%lx", pid, addr);
807 m = MIN(sizeof(long) - n, len);
808 memcpy(laddr, &u.x[n], m);
809 addr += sizeof(long), laddr += m, len -= m;
813 u.val = ptrace(PTRACE_PEEKDATA, pid, (char *) addr, 0);
815 if (started && (errno==EPERM || errno==EIO)) {
816 /* Ran into 'end of memory' - stupid "printpath" */
819 if (addr != 0 && errno != EIO && errno != ESRCH)
820 perror_msg("umoven: PTRACE_PEEKDATA pid:%d @0x%lx", pid, addr);
824 m = MIN(sizeof(long), len);
825 memcpy(laddr, u.x, m);
826 addr += sizeof(long), laddr += m, len -= m;
833 * Like `umove' but make the additional effort of looking
834 * for a terminating zero byte.
836 * Returns < 0 on error, > 0 if NUL was seen,
837 * (TODO if useful: return count of bytes including NUL),
838 * else 0 if len bytes were read but no NUL byte seen.
840 * Note: there is no guarantee we won't overwrite some bytes
841 * in laddr[] _after_ terminating NUL (but, of course,
842 * we never write past laddr[len-1]).
845 umovestr(struct tcb *tcp, long addr, int len, char *laddr)
852 char x[sizeof(long)];
855 #if SUPPORTED_PERSONALITIES > 1
856 if (current_wordsize < sizeof(addr))
857 addr &= (1ul << 8 * current_wordsize) - 1;
860 if (!process_vm_readv_not_supported) {
861 struct iovec local[1], remote[1];
863 local[0].iov_base = laddr;
864 remote[0].iov_base = (void*)addr;
871 /* Don't read kilobytes: most strings are short */
875 /* Don't cross pages. I guess otherwise we can get EFAULT
876 * and fail to notice that terminating NUL lies
877 * in the existing (first) page.
878 * (I hope there aren't arches with pages < 4K)
880 end_in_page = ((addr + chunk_len) & 4095);
881 r = chunk_len - end_in_page;
882 if (r > 0) /* if chunk_len > end_in_page */
883 chunk_len = r; /* chunk_len -= end_in_page */
885 local[0].iov_len = remote[0].iov_len = chunk_len;
886 r = process_vm_readv(pid,
893 process_vm_readv_not_supported = 1;
894 else if (errno != EINVAL) /* EINVAL is seen if process is gone */
896 perror("process_vm_readv");
897 goto vm_readv_didnt_work;
899 if (memchr(local[0].iov_base, '\0', r))
901 local[0].iov_base += r;
902 remote[0].iov_base += r;
910 if (addr & (sizeof(long) - 1)) {
911 /* addr not a multiple of sizeof(long) */
912 n = addr - (addr & -sizeof(long)); /* residue */
913 addr &= -sizeof(long); /* residue */
915 u.val = ptrace(PTRACE_PEEKDATA, pid, (char *)addr, 0);
917 if (addr != 0 && errno != EIO && errno != ESRCH)
918 perror_msg("umovestr: PTRACE_PEEKDATA pid:%d @0x%lx", pid, addr);
922 m = MIN(sizeof(long) - n, len);
923 memcpy(laddr, &u.x[n], m);
924 while (n & (sizeof(long) - 1))
925 if (u.x[n++] == '\0')
927 addr += sizeof(long), laddr += m, len -= m;
931 u.val = ptrace(PTRACE_PEEKDATA, pid, (char *)addr, 0);
933 if (started && (errno==EPERM || errno==EIO)) {
934 /* Ran into 'end of memory' - stupid "printpath" */
937 if (addr != 0 && errno != EIO && errno != ESRCH)
938 perror_msg("umovestr: PTRACE_PEEKDATA pid:%d @0x%lx", pid, addr);
942 m = MIN(sizeof(long), len);
943 memcpy(laddr, u.x, m);
944 for (i = 0; i < sizeof(long); i++)
947 addr += sizeof(long), laddr += m, len -= m;
953 upeek(struct tcb *tcp, long off, long *res)
958 val = ptrace(PTRACE_PEEKUSER, tcp->pid, (char *) off, 0);
959 if (val == -1 && errno) {
960 if (errno != ESRCH) {
961 perror_msg("upeek: PTRACE_PEEKUSER pid:%d @0x%lx)", tcp->pid, off);
970 printcall(struct tcb *tcp)
972 #define PRINTBADPC tprintf(sizeof(long) == 4 ? "[????????] " : \
973 sizeof(long) == 8 ? "[????????????????] " : \
979 if (upeek(tcp, 4*EIP, &eip) < 0) {
983 tprintf("[%08lx] ", eip);
984 #elif defined(S390) || defined(S390X)
986 if (upeek(tcp, PT_PSWADDR, &psw) < 0) {
991 tprintf("[%08lx] ", psw);
993 tprintf("[%16lx] ", psw);
996 #elif defined(X86_64)
999 if (upeek(tcp, 8*RIP, &rip) < 0) {
1003 tprintf("[%16lx] ", rip);
1007 if (upeek(tcp, PT_B0, &ip) < 0) {
1011 tprintf("[%08lx] ", ip);
1012 #elif defined(POWERPC)
1015 if (upeek(tcp, sizeof(unsigned long)*PT_NIP, &pc) < 0) {
1020 tprintf("[%016lx] ", pc);
1022 tprintf("[%08lx] ", pc);
1027 if (upeek(tcp, 4*PT_PC, &pc) < 0) {
1028 tprints("[????????] ");
1031 tprintf("[%08lx] ", pc);
1032 #elif defined(ALPHA)
1035 if (upeek(tcp, REG_PC, &pc) < 0) {
1036 tprints("[????????????????] ");
1039 tprintf("[%08lx] ", pc);
1040 #elif defined(SPARC) || defined(SPARC64)
1041 struct pt_regs regs;
1042 if (ptrace(PTRACE_GETREGS, tcp->pid, (char *)®s, 0) < 0) {
1046 # if defined(SPARC64)
1047 tprintf("[%08lx] ", regs.tpc);
1049 tprintf("[%08lx] ", regs.pc);
1054 if (upeek(tcp, PT_IAOQ0, &pc) < 0) {
1055 tprints("[????????] ");
1058 tprintf("[%08lx] ", pc);
1062 if (upeek(tcp, REG_EPC, &pc) < 0) {
1063 tprints("[????????] ");
1066 tprintf("[%08lx] ", pc);
1070 if (upeek(tcp, 4*REG_PC, &pc) < 0) {
1071 tprints("[????????] ");
1074 tprintf("[%08lx] ", pc);
1078 if (upeek(tcp, REG_PC, &pc) < 0) {
1079 tprints("[????????????????] ");
1082 tprintf("[%08lx] ", pc);
1086 if (upeek(tcp, 4*15, &pc) < 0) {
1090 tprintf("[%08lx] ", pc);
1091 #elif defined(AVR32)
1094 if (upeek(tcp, REG_PC, &pc) < 0) {
1095 tprints("[????????] ");
1098 tprintf("[%08lx] ", pc);
1102 if (upeek(tcp, PT_PC, &pc) < 0) {
1106 tprintf("[%08lx] ", pc);
1107 #elif defined(CRISV10)
1110 if (upeek(tcp, 4*PT_IRP, &pc) < 0) {
1114 tprintf("[%08lx] ", pc);
1115 #elif defined(CRISV32)
1118 if (upeek(tcp, 4*PT_ERP, &pc) < 0) {
1122 tprintf("[%08lx] ", pc);
1123 #endif /* architecture */
1127 * These #if's are huge, please indent them correctly.
1128 * It's easy to get confused otherwise.
1131 #include "syscall.h"
1133 #ifndef CLONE_PTRACE
1134 # define CLONE_PTRACE 0x00002000
1137 # define CLONE_VFORK 0x00004000
1140 # define CLONE_VM 0x00000100
1144 change_syscall(struct tcb *tcp, int new)
1147 if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(ORIG_EAX * 4), new) < 0)
1150 #elif defined(X86_64)
1151 if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(ORIG_RAX * 8), new) < 0)
1154 #elif defined(POWERPC)
1155 if (ptrace(PTRACE_POKEUSER, tcp->pid,
1156 (char*)(sizeof(unsigned long)*PT_R0), new) < 0)
1159 #elif defined(S390) || defined(S390X)
1160 /* s390 linux after 2.4.7 has a hook in entry.S to allow this */
1161 if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(PT_GPR2), new) < 0)
1165 if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(4*PT_ORIG_D0), new) < 0)
1168 #elif defined(SPARC) || defined(SPARC64)
1169 struct pt_regs regs;
1170 if (ptrace(PTRACE_GETREGS, tcp->pid, (char*)®s, 0) < 0)
1172 regs.u_regs[U_REG_G1] = new;
1173 if (ptrace(PTRACE_SETREGS, tcp->pid, (char*)®s, 0) < 0)
1177 if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(REG_V0), new) < 0)
1180 #elif defined(ALPHA)
1181 if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(REG_A3), new) < 0)
1184 #elif defined(AVR32)
1185 if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(REG_R8), new) < 0)
1189 if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(REG_P0), new) < 0)
1196 break; /* x86 SYS_fork */
1201 fprintf(stderr, "%s: unexpected syscall %d\n",
1205 if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(PT_R1), new) < 0)
1207 } else if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(PT_R15), new) < 0)
1211 if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(PT_GR20), new) < 0)
1215 if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(4*(REG_REG0+3)), new) < 0)
1219 /* Top half of reg encodes the no. of args n as 0x1n.
1220 Assume 0 args as kernel never actually checks... */
1221 if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(REG_SYSCALL),
1222 0x100000 | new) < 0)
1225 #elif defined(CRISV10) || defined(CRISV32)
1226 if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(4*PT_R9), new) < 0)
1230 /* Some kernels support this, some (pre-2.6.16 or so) don't. */
1231 # ifndef PTRACE_SET_SYSCALL
1232 # define PTRACE_SET_SYSCALL 23
1234 if (ptrace(PTRACE_SET_SYSCALL, tcp->pid, 0, new & 0xffff) != 0)
1238 if (ptrace(PTRACE_POKEUSER, tcp->pid,
1239 (char*)PTREGS_OFFSET_REG(0),
1243 #elif defined(MICROBLAZE)
1244 if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(PT_GPR(0)), new) < 0)
1248 #warning Do not know how to handle change_syscall for this architecture
1249 #endif /* architecture */
1255 typedef unsigned long *arg_setup_state;
1258 arg_setup(struct tcb *tcp, arg_setup_state *state)
1260 unsigned long cfm, sof, sol;
1264 /* Satisfy a false GCC warning. */
1269 if (upeek(tcp, PT_AR_BSP, &bsp) < 0)
1271 if (upeek(tcp, PT_CFM, (long *) &cfm) < 0)
1274 sof = (cfm >> 0) & 0x7f;
1275 sol = (cfm >> 7) & 0x7f;
1276 bsp = (long) ia64_rse_skip_regs((unsigned long *) bsp, -sof + sol);
1278 *state = (unsigned long *) bsp;
1282 # define arg_finish_change(tcp, state) 0
1285 get_arg0(struct tcb *tcp, arg_setup_state *state, long *valp)
1290 ret = upeek(tcp, PT_R11, valp);
1293 (unsigned long) ia64_rse_skip_regs(*state, 0),
1294 sizeof(long), (void *) valp);
1299 get_arg1(struct tcb *tcp, arg_setup_state *state, long *valp)
1304 ret = upeek(tcp, PT_R9, valp);
1307 (unsigned long) ia64_rse_skip_regs(*state, 1),
1308 sizeof(long), (void *) valp);
1313 set_arg0(struct tcb *tcp, arg_setup_state *state, long val)
1315 int req = PTRACE_POKEDATA;
1319 ap = (void *) (intptr_t) PT_R11; /* r11 == EBX */
1320 req = PTRACE_POKEUSER;
1322 ap = ia64_rse_skip_regs(*state, 0);
1324 ptrace(req, tcp->pid, ap, val);
1325 return errno ? -1 : 0;
1329 set_arg1(struct tcb *tcp, arg_setup_state *state, long val)
1331 int req = PTRACE_POKEDATA;
1335 ap = (void *) (intptr_t) PT_R9; /* r9 == ECX */
1336 req = PTRACE_POKEUSER;
1338 ap = ia64_rse_skip_regs(*state, 1);
1340 ptrace(req, tcp->pid, ap, val);
1341 return errno ? -1 : 0;
1344 /* ia64 does not return the input arguments from functions (and syscalls)
1345 according to ia64 RSE (Register Stack Engine) behavior. */
1347 # define restore_arg0(tcp, state, val) ((void) (state), 0)
1348 # define restore_arg1(tcp, state, val) ((void) (state), 0)
1350 #elif defined(SPARC) || defined(SPARC64)
1352 typedef struct pt_regs arg_setup_state;
1354 # define arg_setup(tcp, state) \
1355 (ptrace(PTRACE_GETREGS, (tcp)->pid, (char *) (state), 0))
1356 # define arg_finish_change(tcp, state) \
1357 (ptrace(PTRACE_SETREGS, (tcp)->pid, (char *) (state), 0))
1359 # define get_arg0(tcp, state, valp) (*(valp) = (state)->u_regs[U_REG_O0], 0)
1360 # define get_arg1(tcp, state, valp) (*(valp) = (state)->u_regs[U_REG_O1], 0)
1361 # define set_arg0(tcp, state, val) ((state)->u_regs[U_REG_O0] = (val), 0)
1362 # define set_arg1(tcp, state, val) ((state)->u_regs[U_REG_O1] = (val), 0)
1363 # define restore_arg0(tcp, state, val) 0
1365 #else /* other architectures */
1367 # if defined S390 || defined S390X
1368 /* Note: this is only true for the `clone' system call, which handles
1369 arguments specially. We could as well say that its first two arguments
1370 are swapped relative to other architectures, but that would just be
1371 another #ifdef in the calls. */
1372 # define arg0_offset PT_GPR3
1373 # define arg1_offset PT_ORIGGPR2
1374 # define restore_arg0(tcp, state, val) ((void) (state), 0)
1375 # define restore_arg1(tcp, state, val) ((void) (state), 0)
1376 # define arg0_index 1
1377 # define arg1_index 0
1378 # elif defined(ALPHA) || defined(MIPS)
1379 # define arg0_offset REG_A0
1380 # define arg1_offset (REG_A0+1)
1381 # elif defined(AVR32)
1382 # define arg0_offset (REG_R12)
1383 # define arg1_offset (REG_R11)
1384 # elif defined(POWERPC)
1385 # define arg0_offset (sizeof(unsigned long)*PT_R3)
1386 # define arg1_offset (sizeof(unsigned long)*PT_R4)
1387 # define restore_arg0(tcp, state, val) ((void) (state), 0)
1388 # elif defined(HPPA)
1389 # define arg0_offset PT_GR26
1390 # define arg1_offset (PT_GR26-4)
1391 # elif defined(X86_64)
1392 # define arg0_offset ((long)(8*(current_personality ? RBX : RDI)))
1393 # define arg1_offset ((long)(8*(current_personality ? RCX : RSI)))
1395 # define arg0_offset (4*(REG_REG0+4))
1396 # define arg1_offset (4*(REG_REG0+5))
1397 # elif defined(SH64)
1398 /* ABI defines arg0 & 1 in r2 & r3 */
1399 # define arg0_offset (REG_OFFSET+16)
1400 # define arg1_offset (REG_OFFSET+24)
1401 # define restore_arg0(tcp, state, val) 0
1402 # elif defined CRISV10 || defined CRISV32
1403 # define arg0_offset (4*PT_R11)
1404 # define arg1_offset (4*PT_ORIG_R10)
1405 # define restore_arg0(tcp, state, val) 0
1406 # define restore_arg1(tcp, state, val) 0
1407 # define arg0_index 1
1408 # define arg1_index 0
1410 # define arg0_offset 0
1411 # define arg1_offset 4
1413 # define restore_arg0(tcp, state, val) 0
1417 typedef int arg_setup_state;
1419 # define arg_setup(tcp, state) (0)
1420 # define arg_finish_change(tcp, state) 0
1421 # define get_arg0(tcp, cookie, valp) (upeek((tcp), arg0_offset, (valp)))
1422 # define get_arg1(tcp, cookie, valp) (upeek((tcp), arg1_offset, (valp)))
1425 set_arg0(struct tcb *tcp, void *cookie, long val)
1427 return ptrace(PTRACE_POKEUSER, tcp->pid, (char*)arg0_offset, val);
1431 set_arg1(struct tcb *tcp, void *cookie, long val)
1433 return ptrace(PTRACE_POKEUSER, tcp->pid, (char*)arg1_offset, val);
1436 #endif /* architectures */
1438 #ifndef restore_arg0
1439 # define restore_arg0(tcp, state, val) set_arg0((tcp), (state), (val))
1441 #ifndef restore_arg1
1442 # define restore_arg1(tcp, state, val) set_arg1((tcp), (state), (val))
1446 # define arg0_index 0
1447 # define arg1_index 1
1451 setbpt(struct tcb *tcp)
1453 static int clone_scno[SUPPORTED_PERSONALITIES] = { SYS_clone };
1454 arg_setup_state state;
1456 if (tcp->flags & TCB_BPTSET) {
1457 fprintf(stderr, "PANIC: TCB already set in pid %u\n", tcp->pid);
1462 * It's a silly kludge to initialize this with a search at runtime.
1463 * But it's better than maintaining another magic thing in the
1464 * godforsaken tables.
1466 if (clone_scno[current_personality] == 0) {
1468 for (i = 0; i < nsyscalls; ++i)
1469 if (sysent[i].sys_func == sys_clone) {
1470 clone_scno[current_personality] = i;
1475 if (sysent[tcp->scno].sys_func == sys_fork ||
1476 sysent[tcp->scno].sys_func == sys_vfork) {
1477 if (arg_setup(tcp, &state) < 0
1478 || get_arg0(tcp, &state, &tcp->inst[0]) < 0
1479 || get_arg1(tcp, &state, &tcp->inst[1]) < 0
1480 || change_syscall(tcp, clone_scno[current_personality]) < 0
1481 || set_arg0(tcp, &state, CLONE_PTRACE|SIGCHLD) < 0
1482 || set_arg1(tcp, &state, 0) < 0
1483 || arg_finish_change(tcp, &state) < 0)
1485 tcp->u_arg[arg0_index] = CLONE_PTRACE|SIGCHLD;
1486 tcp->u_arg[arg1_index] = 0;
1487 tcp->flags |= TCB_BPTSET;
1491 if (sysent[tcp->scno].sys_func == sys_clone) {
1492 /* ia64 calls directly `clone (CLONE_VFORK | CLONE_VM)'
1493 contrary to x86 vfork above. Even on x86 we turn the
1494 vfork semantics into plain fork - each application must not
1495 depend on the vfork specifics according to POSIX. We would
1496 hang waiting for the parent resume otherwise. We need to
1497 clear also CLONE_VM but only in the CLONE_VFORK case as
1498 otherwise we would break pthread_create. */
1500 long new_arg0 = (tcp->u_arg[arg0_index] | CLONE_PTRACE);
1501 if (new_arg0 & CLONE_VFORK)
1502 new_arg0 &= ~(unsigned long)(CLONE_VFORK | CLONE_VM);
1503 if (arg_setup(tcp, &state) < 0
1504 || set_arg0(tcp, &state, new_arg0) < 0
1505 || arg_finish_change(tcp, &state) < 0)
1507 tcp->flags |= TCB_BPTSET;
1508 tcp->inst[0] = tcp->u_arg[arg0_index];
1509 tcp->inst[1] = tcp->u_arg[arg1_index];
1513 fprintf(stderr, "PANIC: setbpt for syscall %ld on %u???\n",
1514 tcp->scno, tcp->pid);
1519 clearbpt(struct tcb *tcp)
1521 arg_setup_state state;
1522 if (arg_setup(tcp, &state) < 0
1523 || restore_arg0(tcp, &state, tcp->inst[0]) < 0
1524 || restore_arg1(tcp, &state, tcp->inst[1]) < 0
1525 || arg_finish_change(tcp, &state))
1528 tcp->flags &= ~TCB_BPTSET;