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 || defined X32
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' is -1, treat `instr' as a NUL-terminated string
376 * and quote at most (`size' - 1) bytes.
378 * Returns 0 if len == -1 and NUL was seen, 1 otherwise.
379 * Note that if len >= 0, always returns 1.
382 string_quote(const char *instr, char *outstr, long 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 == -1 && 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, long len)
556 static char *str = NULL;
565 /* Allocate static buffers if they are not allocated yet. */
567 unsigned int outstr_size = 4 * max_strlen + /*for quotes and NUL:*/ 3;
569 if (outstr_size / 4 != max_strlen)
571 str = malloc(max_strlen + 1);
574 outstr = malloc(outstr_size);
581 * Treat as a NUL-terminated string: fetch one byte more
582 * because string_quote() quotes one byte less.
584 size = max_strlen + 1;
585 if (umovestr(tcp, addr, size, str) < 0) {
586 tprintf("%#lx", addr);
592 if (size > (unsigned long)len)
593 size = (unsigned long)len;
594 if (umoven(tcp, addr, size, str) < 0) {
595 tprintf("%#lx", addr);
600 /* If string_quote didn't see NUL and (it was supposed to be ASCIZ str
601 * or we were requested to print more than -s NUM chars)...
603 ellipsis = (string_quote(str, outstr, len, size) &&
604 (len < 0 || len > max_strlen));
613 dumpiov(struct tcb *tcp, int len, long addr)
615 #if SUPPORTED_PERSONALITIES > 1
617 struct { u_int32_t base; u_int32_t len; } *iov32;
618 struct { u_int64_t base; u_int64_t len; } *iov64;
620 #define iov iovu.iov64
622 (current_wordsize == 4 ? sizeof(*iovu.iov32) : sizeof(*iovu.iov64))
623 #define iov_iov_base(i) \
624 (current_wordsize == 4 ? (uint64_t) iovu.iov32[i].base : iovu.iov64[i].base)
625 #define iov_iov_len(i) \
626 (current_wordsize == 4 ? (uint64_t) iovu.iov32[i].len : iovu.iov64[i].len)
629 #define sizeof_iov sizeof(*iov)
630 #define iov_iov_base(i) iov[i].iov_base
631 #define iov_iov_len(i) iov[i].iov_len
636 size = sizeof_iov * len;
637 /* Assuming no sane program has millions of iovs */
638 if ((unsigned)len > 1024*1024 /* insane or negative size? */
639 || (iov = malloc(size)) == NULL) {
640 fprintf(stderr, "Out of memory\n");
643 if (umoven(tcp, addr, size, (char *) iov) >= 0) {
644 for (i = 0; i < len; i++) {
645 /* include the buffer number to make it easy to
646 * match up the trace with the source */
647 tprintf(" * %lu bytes in buffer %d\n",
648 (unsigned long)iov_iov_len(i), i);
649 dumpstr(tcp, (long) iov_iov_base(i),
662 dumpstr(struct tcb *tcp, long addr, int len)
664 static int strsize = -1;
665 static unsigned char *str;
674 fprintf(stderr, "Out of memory\n");
680 if (umoven(tcp, addr, len, (char *) str) < 0)
683 for (i = 0; i < len; i += 16) {
687 sprintf(s, " | %05x ", i);
689 for (j = 0; j < 16; j++) {
693 sprintf(s, " %02x", str[i + j]);
697 *s++ = ' '; *s++ = ' '; *s++ = ' ';
700 *s++ = ' '; *s++ = ' ';
701 for (j = 0; j < 16; j++) {
705 if (isprint(str[i + j]))
713 tprintf("%s |\n", outstr);
717 #ifdef HAVE_PROCESS_VM_READV
718 /* C library supports this, but the kernel might not. */
719 static bool process_vm_readv_not_supported = 0;
722 /* Need to do this since process_vm_readv() is not yet available in libc.
723 * When libc is be updated, only "static bool process_vm_readv_not_supported"
724 * line should remain.
726 #if !defined(__NR_process_vm_readv)
728 # define __NR_process_vm_readv 347
729 # elif defined(X86_64)
730 # define __NR_process_vm_readv 310
731 # elif defined(POWERPC)
732 # define __NR_process_vm_readv 351
736 #if defined(__NR_process_vm_readv)
737 static bool process_vm_readv_not_supported = 0;
738 static ssize_t process_vm_readv(pid_t pid,
739 const struct iovec *lvec,
740 unsigned long liovcnt,
741 const struct iovec *rvec,
742 unsigned long riovcnt,
745 return syscall(__NR_process_vm_readv, (long)pid, lvec, liovcnt, rvec, riovcnt, flags);
748 static bool process_vm_readv_not_supported = 1;
749 # define process_vm_readv(...) (errno = ENOSYS, -1)
752 #endif /* end of hack */
754 #define PAGMASK (~(PAGSIZ - 1))
756 * move `len' bytes of data from process `pid'
757 * at address `addr' to our space at `laddr'
760 umoven(struct tcb *tcp, long addr, int len, char *laddr)
767 char x[sizeof(long)];
770 #if SUPPORTED_PERSONALITIES > 1
771 if (current_wordsize < sizeof(addr))
772 addr &= (1ul << 8 * current_wordsize) - 1;
775 if (!process_vm_readv_not_supported) {
776 struct iovec local[1], remote[1];
779 local[0].iov_base = laddr;
780 remote[0].iov_base = (void*)addr;
781 local[0].iov_len = remote[0].iov_len = len;
782 r = process_vm_readv(pid,
789 process_vm_readv_not_supported = 1;
790 else if (errno != EINVAL) /* EINVAL is seen if process is gone */
792 perror("process_vm_readv");
793 goto vm_readv_didnt_work;
800 if (addr & (sizeof(long) - 1)) {
801 /* addr not a multiple of sizeof(long) */
802 n = addr - (addr & -sizeof(long)); /* residue */
803 addr &= -sizeof(long); /* residue */
805 u.val = ptrace(PTRACE_PEEKDATA, pid, (char *) addr, 0);
807 /* But if not started, we had a bogus address. */
808 if (addr != 0 && errno != EIO && errno != ESRCH)
809 perror_msg("umoven: PTRACE_PEEKDATA pid:%d @0x%lx", pid, addr);
813 m = MIN(sizeof(long) - n, len);
814 memcpy(laddr, &u.x[n], m);
815 addr += sizeof(long), laddr += m, len -= m;
819 u.val = ptrace(PTRACE_PEEKDATA, pid, (char *) addr, 0);
821 if (started && (errno==EPERM || errno==EIO)) {
822 /* Ran into 'end of memory' - stupid "printpath" */
825 if (addr != 0 && errno != EIO && errno != ESRCH)
826 perror_msg("umoven: PTRACE_PEEKDATA pid:%d @0x%lx", pid, addr);
830 m = MIN(sizeof(long), len);
831 memcpy(laddr, u.x, m);
832 addr += sizeof(long), laddr += m, len -= m;
839 * Like `umove' but make the additional effort of looking
840 * for a terminating zero byte.
842 * Returns < 0 on error, > 0 if NUL was seen,
843 * (TODO if useful: return count of bytes including NUL),
844 * else 0 if len bytes were read but no NUL byte seen.
846 * Note: there is no guarantee we won't overwrite some bytes
847 * in laddr[] _after_ terminating NUL (but, of course,
848 * we never write past laddr[len-1]).
851 umovestr(struct tcb *tcp, long addr, int len, char *laddr)
858 char x[sizeof(long)];
861 #if SUPPORTED_PERSONALITIES > 1
862 if (current_wordsize < sizeof(addr))
863 addr &= (1ul << 8 * current_wordsize) - 1;
866 if (!process_vm_readv_not_supported) {
867 struct iovec local[1], remote[1];
869 local[0].iov_base = laddr;
870 remote[0].iov_base = (void*)addr;
877 /* Don't read kilobytes: most strings are short */
881 /* Don't cross pages. I guess otherwise we can get EFAULT
882 * and fail to notice that terminating NUL lies
883 * in the existing (first) page.
884 * (I hope there aren't arches with pages < 4K)
886 end_in_page = ((addr + chunk_len) & 4095);
887 r = chunk_len - end_in_page;
888 if (r > 0) /* if chunk_len > end_in_page */
889 chunk_len = r; /* chunk_len -= end_in_page */
891 local[0].iov_len = remote[0].iov_len = chunk_len;
892 r = process_vm_readv(pid,
899 process_vm_readv_not_supported = 1;
900 else if (errno != EINVAL) /* EINVAL is seen if process is gone */
902 perror("process_vm_readv");
903 goto vm_readv_didnt_work;
905 if (memchr(local[0].iov_base, '\0', r))
907 local[0].iov_base += r;
908 remote[0].iov_base += r;
916 if (addr & (sizeof(long) - 1)) {
917 /* addr not a multiple of sizeof(long) */
918 n = addr - (addr & -sizeof(long)); /* residue */
919 addr &= -sizeof(long); /* residue */
921 u.val = ptrace(PTRACE_PEEKDATA, pid, (char *)addr, 0);
923 if (addr != 0 && errno != EIO && errno != ESRCH)
924 perror_msg("umovestr: PTRACE_PEEKDATA pid:%d @0x%lx", pid, addr);
928 m = MIN(sizeof(long) - n, len);
929 memcpy(laddr, &u.x[n], m);
930 while (n & (sizeof(long) - 1))
931 if (u.x[n++] == '\0')
933 addr += sizeof(long), laddr += m, len -= m;
937 u.val = ptrace(PTRACE_PEEKDATA, pid, (char *)addr, 0);
939 if (started && (errno==EPERM || errno==EIO)) {
940 /* Ran into 'end of memory' - stupid "printpath" */
943 if (addr != 0 && errno != EIO && errno != ESRCH)
944 perror_msg("umovestr: PTRACE_PEEKDATA pid:%d @0x%lx", pid, addr);
948 m = MIN(sizeof(long), len);
949 memcpy(laddr, u.x, m);
950 for (i = 0; i < sizeof(long); i++)
953 addr += sizeof(long), laddr += m, len -= m;
959 upeek(struct tcb *tcp, long off, long *res)
964 val = ptrace(PTRACE_PEEKUSER, tcp->pid, (char *) off, 0);
965 if (val == -1 && errno) {
966 if (errno != ESRCH) {
967 perror_msg("upeek: PTRACE_PEEKUSER pid:%d @0x%lx)", tcp->pid, off);
976 printcall(struct tcb *tcp)
978 #define PRINTBADPC tprintf(sizeof(long) == 4 ? "[????????] " : \
979 sizeof(long) == 8 ? "[????????????????] " : \
985 if (upeek(tcp, 4*EIP, &eip) < 0) {
989 tprintf("[%08lx] ", eip);
990 #elif defined(S390) || defined(S390X)
992 if (upeek(tcp, PT_PSWADDR, &psw) < 0) {
997 tprintf("[%08lx] ", psw);
999 tprintf("[%16lx] ", psw);
1002 #elif defined(X86_64) || defined(X32)
1005 if (upeek(tcp, 8*RIP, &rip) < 0) {
1009 tprintf("[%16lx] ", rip);
1013 if (upeek(tcp, PT_B0, &ip) < 0) {
1017 tprintf("[%08lx] ", ip);
1018 #elif defined(POWERPC)
1021 if (upeek(tcp, sizeof(unsigned long)*PT_NIP, &pc) < 0) {
1026 tprintf("[%016lx] ", pc);
1028 tprintf("[%08lx] ", pc);
1033 if (upeek(tcp, 4*PT_PC, &pc) < 0) {
1034 tprints("[????????] ");
1037 tprintf("[%08lx] ", pc);
1038 #elif defined(ALPHA)
1041 if (upeek(tcp, REG_PC, &pc) < 0) {
1042 tprints("[????????????????] ");
1045 tprintf("[%08lx] ", pc);
1046 #elif defined(SPARC) || defined(SPARC64)
1047 struct pt_regs regs;
1048 if (ptrace(PTRACE_GETREGS, tcp->pid, (char *)®s, 0) < 0) {
1052 # if defined(SPARC64)
1053 tprintf("[%08lx] ", regs.tpc);
1055 tprintf("[%08lx] ", regs.pc);
1060 if (upeek(tcp, PT_IAOQ0, &pc) < 0) {
1061 tprints("[????????] ");
1064 tprintf("[%08lx] ", pc);
1068 if (upeek(tcp, REG_EPC, &pc) < 0) {
1069 tprints("[????????] ");
1072 tprintf("[%08lx] ", pc);
1076 if (upeek(tcp, 4*REG_PC, &pc) < 0) {
1077 tprints("[????????] ");
1080 tprintf("[%08lx] ", pc);
1084 if (upeek(tcp, REG_PC, &pc) < 0) {
1085 tprints("[????????????????] ");
1088 tprintf("[%08lx] ", pc);
1092 if (upeek(tcp, 4*15, &pc) < 0) {
1096 tprintf("[%08lx] ", pc);
1097 #elif defined(AVR32)
1100 if (upeek(tcp, REG_PC, &pc) < 0) {
1101 tprints("[????????] ");
1104 tprintf("[%08lx] ", pc);
1108 if (upeek(tcp, PT_PC, &pc) < 0) {
1112 tprintf("[%08lx] ", pc);
1113 #elif defined(CRISV10)
1116 if (upeek(tcp, 4*PT_IRP, &pc) < 0) {
1120 tprintf("[%08lx] ", pc);
1121 #elif defined(CRISV32)
1124 if (upeek(tcp, 4*PT_ERP, &pc) < 0) {
1128 tprintf("[%08lx] ", pc);
1129 #endif /* architecture */
1133 * These #if's are huge, please indent them correctly.
1134 * It's easy to get confused otherwise.
1137 #include "syscall.h"
1139 #ifndef CLONE_PTRACE
1140 # define CLONE_PTRACE 0x00002000
1143 # define CLONE_VFORK 0x00004000
1146 # define CLONE_VM 0x00000100
1150 change_syscall(struct tcb *tcp, int new)
1153 if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(ORIG_EAX * 4), new) < 0)
1156 #elif defined(X86_64) || defined(X32)
1157 if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(ORIG_RAX * 8), new) < 0)
1160 #elif defined(POWERPC)
1161 if (ptrace(PTRACE_POKEUSER, tcp->pid,
1162 (char*)(sizeof(unsigned long)*PT_R0), new) < 0)
1165 #elif defined(S390) || defined(S390X)
1166 /* s390 linux after 2.4.7 has a hook in entry.S to allow this */
1167 if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(PT_GPR2), new) < 0)
1171 if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(4*PT_ORIG_D0), new) < 0)
1174 #elif defined(SPARC) || defined(SPARC64)
1175 struct pt_regs regs;
1176 if (ptrace(PTRACE_GETREGS, tcp->pid, (char*)®s, 0) < 0)
1178 regs.u_regs[U_REG_G1] = new;
1179 if (ptrace(PTRACE_SETREGS, tcp->pid, (char*)®s, 0) < 0)
1183 if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(REG_V0), new) < 0)
1186 #elif defined(ALPHA)
1187 if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(REG_A3), new) < 0)
1190 #elif defined(AVR32)
1191 if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(REG_R8), new) < 0)
1195 if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(REG_P0), new) < 0)
1202 break; /* x86 SYS_fork */
1207 fprintf(stderr, "%s: unexpected syscall %d\n",
1211 if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(PT_R1), new) < 0)
1213 } else if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(PT_R15), new) < 0)
1217 if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(PT_GR20), new) < 0)
1221 if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(4*(REG_REG0+3)), new) < 0)
1225 /* Top half of reg encodes the no. of args n as 0x1n.
1226 Assume 0 args as kernel never actually checks... */
1227 if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(REG_SYSCALL),
1228 0x100000 | new) < 0)
1231 #elif defined(CRISV10) || defined(CRISV32)
1232 if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(4*PT_R9), new) < 0)
1236 /* Some kernels support this, some (pre-2.6.16 or so) don't. */
1237 # ifndef PTRACE_SET_SYSCALL
1238 # define PTRACE_SET_SYSCALL 23
1240 if (ptrace(PTRACE_SET_SYSCALL, tcp->pid, 0, new & 0xffff) != 0)
1244 if (ptrace(PTRACE_POKEUSER, tcp->pid,
1245 (char*)PTREGS_OFFSET_REG(0),
1249 #elif defined(MICROBLAZE)
1250 if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(PT_GPR(0)), new) < 0)
1254 #warning Do not know how to handle change_syscall for this architecture
1255 #endif /* architecture */
1261 typedef unsigned long *arg_setup_state;
1264 arg_setup(struct tcb *tcp, arg_setup_state *state)
1266 unsigned long cfm, sof, sol;
1270 /* Satisfy a false GCC warning. */
1275 if (upeek(tcp, PT_AR_BSP, &bsp) < 0)
1277 if (upeek(tcp, PT_CFM, (long *) &cfm) < 0)
1280 sof = (cfm >> 0) & 0x7f;
1281 sol = (cfm >> 7) & 0x7f;
1282 bsp = (long) ia64_rse_skip_regs((unsigned long *) bsp, -sof + sol);
1284 *state = (unsigned long *) bsp;
1288 # define arg_finish_change(tcp, state) 0
1291 get_arg0(struct tcb *tcp, arg_setup_state *state, long *valp)
1296 ret = upeek(tcp, PT_R11, valp);
1299 (unsigned long) ia64_rse_skip_regs(*state, 0),
1300 sizeof(long), (void *) valp);
1305 get_arg1(struct tcb *tcp, arg_setup_state *state, long *valp)
1310 ret = upeek(tcp, PT_R9, valp);
1313 (unsigned long) ia64_rse_skip_regs(*state, 1),
1314 sizeof(long), (void *) valp);
1319 set_arg0(struct tcb *tcp, arg_setup_state *state, long val)
1321 int req = PTRACE_POKEDATA;
1325 ap = (void *) (intptr_t) PT_R11; /* r11 == EBX */
1326 req = PTRACE_POKEUSER;
1328 ap = ia64_rse_skip_regs(*state, 0);
1330 ptrace(req, tcp->pid, ap, val);
1331 return errno ? -1 : 0;
1335 set_arg1(struct tcb *tcp, arg_setup_state *state, long val)
1337 int req = PTRACE_POKEDATA;
1341 ap = (void *) (intptr_t) PT_R9; /* r9 == ECX */
1342 req = PTRACE_POKEUSER;
1344 ap = ia64_rse_skip_regs(*state, 1);
1346 ptrace(req, tcp->pid, ap, val);
1347 return errno ? -1 : 0;
1350 /* ia64 does not return the input arguments from functions (and syscalls)
1351 according to ia64 RSE (Register Stack Engine) behavior. */
1353 # define restore_arg0(tcp, state, val) ((void) (state), 0)
1354 # define restore_arg1(tcp, state, val) ((void) (state), 0)
1356 #elif defined(SPARC) || defined(SPARC64)
1358 typedef struct pt_regs arg_setup_state;
1360 # define arg_setup(tcp, state) \
1361 (ptrace(PTRACE_GETREGS, (tcp)->pid, (char *) (state), 0))
1362 # define arg_finish_change(tcp, state) \
1363 (ptrace(PTRACE_SETREGS, (tcp)->pid, (char *) (state), 0))
1365 # define get_arg0(tcp, state, valp) (*(valp) = (state)->u_regs[U_REG_O0], 0)
1366 # define get_arg1(tcp, state, valp) (*(valp) = (state)->u_regs[U_REG_O1], 0)
1367 # define set_arg0(tcp, state, val) ((state)->u_regs[U_REG_O0] = (val), 0)
1368 # define set_arg1(tcp, state, val) ((state)->u_regs[U_REG_O1] = (val), 0)
1369 # define restore_arg0(tcp, state, val) 0
1371 #else /* other architectures */
1373 # if defined S390 || defined S390X
1374 /* Note: this is only true for the `clone' system call, which handles
1375 arguments specially. We could as well say that its first two arguments
1376 are swapped relative to other architectures, but that would just be
1377 another #ifdef in the calls. */
1378 # define arg0_offset PT_GPR3
1379 # define arg1_offset PT_ORIGGPR2
1380 # define restore_arg0(tcp, state, val) ((void) (state), 0)
1381 # define restore_arg1(tcp, state, val) ((void) (state), 0)
1382 # define arg0_index 1
1383 # define arg1_index 0
1384 # elif defined(ALPHA) || defined(MIPS)
1385 # define arg0_offset REG_A0
1386 # define arg1_offset (REG_A0+1)
1387 # elif defined(AVR32)
1388 # define arg0_offset (REG_R12)
1389 # define arg1_offset (REG_R11)
1390 # elif defined(POWERPC)
1391 # define arg0_offset (sizeof(unsigned long)*PT_R3)
1392 # define arg1_offset (sizeof(unsigned long)*PT_R4)
1393 # define restore_arg0(tcp, state, val) ((void) (state), 0)
1394 # elif defined(HPPA)
1395 # define arg0_offset PT_GR26
1396 # define arg1_offset (PT_GR26-4)
1397 # elif defined(X86_64) || defined(X32)
1398 # define arg0_offset ((long)(8*(current_personality ? RBX : RDI)))
1399 # define arg1_offset ((long)(8*(current_personality ? RCX : RSI)))
1401 # define arg0_offset (4*(REG_REG0+4))
1402 # define arg1_offset (4*(REG_REG0+5))
1403 # elif defined(SH64)
1404 /* ABI defines arg0 & 1 in r2 & r3 */
1405 # define arg0_offset (REG_OFFSET+16)
1406 # define arg1_offset (REG_OFFSET+24)
1407 # define restore_arg0(tcp, state, val) 0
1408 # elif defined CRISV10 || defined CRISV32
1409 # define arg0_offset (4*PT_R11)
1410 # define arg1_offset (4*PT_ORIG_R10)
1411 # define restore_arg0(tcp, state, val) 0
1412 # define restore_arg1(tcp, state, val) 0
1413 # define arg0_index 1
1414 # define arg1_index 0
1416 # define arg0_offset 0
1417 # define arg1_offset 4
1419 # define restore_arg0(tcp, state, val) 0
1423 typedef int arg_setup_state;
1425 # define arg_setup(tcp, state) (0)
1426 # define arg_finish_change(tcp, state) 0
1427 # define get_arg0(tcp, cookie, valp) (upeek((tcp), arg0_offset, (valp)))
1428 # define get_arg1(tcp, cookie, valp) (upeek((tcp), arg1_offset, (valp)))
1431 set_arg0(struct tcb *tcp, void *cookie, long val)
1433 return ptrace(PTRACE_POKEUSER, tcp->pid, (char*)arg0_offset, val);
1437 set_arg1(struct tcb *tcp, void *cookie, long val)
1439 return ptrace(PTRACE_POKEUSER, tcp->pid, (char*)arg1_offset, val);
1442 #endif /* architectures */
1444 #ifndef restore_arg0
1445 # define restore_arg0(tcp, state, val) set_arg0((tcp), (state), (val))
1447 #ifndef restore_arg1
1448 # define restore_arg1(tcp, state, val) set_arg1((tcp), (state), (val))
1452 # define arg0_index 0
1453 # define arg1_index 1
1457 setbpt(struct tcb *tcp)
1459 static int clone_scno[SUPPORTED_PERSONALITIES] = { SYS_clone };
1460 arg_setup_state state;
1462 if (tcp->flags & TCB_BPTSET) {
1463 fprintf(stderr, "PANIC: TCB already set in pid %u\n", tcp->pid);
1468 * It's a silly kludge to initialize this with a search at runtime.
1469 * But it's better than maintaining another magic thing in the
1470 * godforsaken tables.
1472 if (clone_scno[current_personality] == 0) {
1474 for (i = 0; i < nsyscalls; ++i)
1475 if (sysent[i].sys_func == sys_clone) {
1476 clone_scno[current_personality] = i;
1481 if (sysent[tcp->scno].sys_func == sys_fork ||
1482 sysent[tcp->scno].sys_func == sys_vfork) {
1483 if (arg_setup(tcp, &state) < 0
1484 || get_arg0(tcp, &state, &tcp->inst[0]) < 0
1485 || get_arg1(tcp, &state, &tcp->inst[1]) < 0
1486 || change_syscall(tcp, clone_scno[current_personality]) < 0
1487 || set_arg0(tcp, &state, CLONE_PTRACE|SIGCHLD) < 0
1488 || set_arg1(tcp, &state, 0) < 0
1489 || arg_finish_change(tcp, &state) < 0)
1491 tcp->u_arg[arg0_index] = CLONE_PTRACE|SIGCHLD;
1492 tcp->u_arg[arg1_index] = 0;
1493 tcp->flags |= TCB_BPTSET;
1497 if (sysent[tcp->scno].sys_func == sys_clone) {
1498 /* ia64 calls directly `clone (CLONE_VFORK | CLONE_VM)'
1499 contrary to x86 vfork above. Even on x86 we turn the
1500 vfork semantics into plain fork - each application must not
1501 depend on the vfork specifics according to POSIX. We would
1502 hang waiting for the parent resume otherwise. We need to
1503 clear also CLONE_VM but only in the CLONE_VFORK case as
1504 otherwise we would break pthread_create. */
1506 long new_arg0 = (tcp->u_arg[arg0_index] | CLONE_PTRACE);
1507 if (new_arg0 & CLONE_VFORK)
1508 new_arg0 &= ~(unsigned long)(CLONE_VFORK | CLONE_VM);
1509 if (arg_setup(tcp, &state) < 0
1510 || set_arg0(tcp, &state, new_arg0) < 0
1511 || arg_finish_change(tcp, &state) < 0)
1513 tcp->flags |= TCB_BPTSET;
1514 tcp->inst[0] = tcp->u_arg[arg0_index];
1515 tcp->inst[1] = tcp->u_arg[arg1_index];
1519 fprintf(stderr, "PANIC: setbpt for syscall %ld on %u???\n",
1520 tcp->scno, tcp->pid);
1525 clearbpt(struct tcb *tcp)
1527 arg_setup_state state;
1528 if (arg_setup(tcp, &state) < 0
1529 || restore_arg0(tcp, &state, tcp->inst[0]) < 0
1530 || restore_arg1(tcp, &state, tcp->inst[1]) < 0
1531 || arg_finish_change(tcp, &state))
1534 tcp->flags &= ~TCB_BPTSET;