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.
35 #include <sys/param.h>
37 /* for struct iovec */
44 # undef PTRACE_GETREGS
45 # define PTRACE_GETREGS PTRACE_GETREGS64
46 # undef PTRACE_SETREGS
47 # define PTRACE_SETREGS PTRACE_SETREGS64
51 # include <asm/psrcompat.h>
61 # define NT_PRSTATUS 1
65 # warning: NSIG is not defined, using 32
71 /* Define these shorthand notations to simplify the syscallent files. */
75 #define TN TRACE_NETWORK
76 #define TP TRACE_PROCESS
77 #define TS TRACE_SIGNAL
78 #define TM TRACE_MEMORY
79 #define NF SYSCALL_NEVER_FAILS
81 #define SI STACKTRACE_INVALIDATE_CACHE
82 #define SE STACKTRACE_CAPTURE_ON_ENTER
84 const struct_sysent sysent0[] = {
85 #include "syscallent.h"
88 #if SUPPORTED_PERSONALITIES > 1
89 static const struct_sysent sysent1[] = {
90 # include "syscallent1.h"
94 #if SUPPORTED_PERSONALITIES > 2
95 static const struct_sysent sysent2[] = {
96 # include "syscallent2.h"
100 /* Now undef them since short defines cause wicked namespace pollution. */
114 * `ioctlent[012].h' files are automatically generated by the auxiliary
115 * program `ioctlsort', such that the list is sorted by the `code' field.
116 * This has the side-effect of resolving the _IO.. macros into
117 * plain integers, eliminating the need to include here everything
121 const char *const errnoent0[] = {
122 #include "errnoent.h"
124 const char *const signalent0[] = {
125 #include "signalent.h"
127 const struct_ioctlent ioctlent0[] = {
128 #include "ioctlent0.h"
131 #if SUPPORTED_PERSONALITIES > 1
132 static const char *const errnoent1[] = {
133 # include "errnoent1.h"
135 static const char *const signalent1[] = {
136 # include "signalent1.h"
138 static const struct_ioctlent ioctlent1[] = {
139 # include "ioctlent1.h"
143 #if SUPPORTED_PERSONALITIES > 2
144 static const char *const errnoent2[] = {
145 # include "errnoent2.h"
147 static const char *const signalent2[] = {
148 # include "signalent2.h"
150 static const struct_ioctlent ioctlent2[] = {
151 # include "ioctlent2.h"
156 nsyscalls0 = ARRAY_SIZE(sysent0)
157 #if SUPPORTED_PERSONALITIES > 1
158 , nsyscalls1 = ARRAY_SIZE(sysent1)
159 # if SUPPORTED_PERSONALITIES > 2
160 , nsyscalls2 = ARRAY_SIZE(sysent2)
166 nerrnos0 = ARRAY_SIZE(errnoent0)
167 #if SUPPORTED_PERSONALITIES > 1
168 , nerrnos1 = ARRAY_SIZE(errnoent1)
169 # if SUPPORTED_PERSONALITIES > 2
170 , nerrnos2 = ARRAY_SIZE(errnoent2)
176 nsignals0 = ARRAY_SIZE(signalent0)
177 #if SUPPORTED_PERSONALITIES > 1
178 , nsignals1 = ARRAY_SIZE(signalent1)
179 # if SUPPORTED_PERSONALITIES > 2
180 , nsignals2 = ARRAY_SIZE(signalent2)
186 nioctlents0 = ARRAY_SIZE(ioctlent0)
187 #if SUPPORTED_PERSONALITIES > 1
188 , nioctlents1 = ARRAY_SIZE(ioctlent1)
189 # if SUPPORTED_PERSONALITIES > 2
190 , nioctlents2 = ARRAY_SIZE(ioctlent2)
195 #if SUPPORTED_PERSONALITIES > 1
196 const struct_sysent *sysent = sysent0;
197 const char *const *errnoent = errnoent0;
198 const char *const *signalent = signalent0;
199 const struct_ioctlent *ioctlent = ioctlent0;
201 unsigned nsyscalls = nsyscalls0;
202 unsigned nerrnos = nerrnos0;
203 unsigned nsignals = nsignals0;
204 unsigned nioctlents = nioctlents0;
207 qualbits_t *qual_vec[SUPPORTED_PERSONALITIES];
209 static const unsigned nsyscall_vec[SUPPORTED_PERSONALITIES] = {
211 #if SUPPORTED_PERSONALITIES > 1
214 #if SUPPORTED_PERSONALITIES > 2
218 static const struct_sysent *const sysent_vec[SUPPORTED_PERSONALITIES] = {
220 #if SUPPORTED_PERSONALITIES > 1
223 #if SUPPORTED_PERSONALITIES > 2
229 MAX_NSYSCALLS1 = (nsyscalls0
230 #if SUPPORTED_PERSONALITIES > 1
231 > nsyscalls1 ? nsyscalls0 : nsyscalls1
234 MAX_NSYSCALLS2 = (MAX_NSYSCALLS1
235 #if SUPPORTED_PERSONALITIES > 2
236 > nsyscalls2 ? MAX_NSYSCALLS1 : nsyscalls2
239 MAX_NSYSCALLS = MAX_NSYSCALLS2,
240 /* We are ready for arches with up to 255 signals,
241 * even though the largest known signo is on MIPS and it is 128.
242 * The number of existing syscalls on all arches is
243 * larger that 255 anyway, so it is just a pedantic matter.
245 MIN_QUALS = MAX_NSYSCALLS > 255 ? MAX_NSYSCALLS : 255
248 #if SUPPORTED_PERSONALITIES > 1
249 unsigned current_personality;
251 # ifndef current_wordsize
252 unsigned current_wordsize;
253 static const int personality_wordsize[SUPPORTED_PERSONALITIES] = {
254 PERSONALITY0_WORDSIZE,
255 PERSONALITY1_WORDSIZE,
256 # if SUPPORTED_PERSONALITIES > 2
257 PERSONALITY2_WORDSIZE,
263 set_personality(int personality)
265 nsyscalls = nsyscall_vec[personality];
266 sysent = sysent_vec[personality];
268 switch (personality) {
270 errnoent = errnoent0;
272 ioctlent = ioctlent0;
273 nioctlents = nioctlents0;
274 signalent = signalent0;
275 nsignals = nsignals0;
279 errnoent = errnoent1;
281 ioctlent = ioctlent1;
282 nioctlents = nioctlents1;
283 signalent = signalent1;
284 nsignals = nsignals1;
287 # if SUPPORTED_PERSONALITIES > 2
289 errnoent = errnoent2;
291 ioctlent = ioctlent2;
292 nioctlents = nioctlents2;
293 signalent = signalent2;
294 nsignals = nsignals2;
299 current_personality = personality;
300 # ifndef current_wordsize
301 current_wordsize = personality_wordsize[personality];
306 update_personality(struct tcb *tcp, unsigned int personality)
308 if (personality == current_personality)
310 set_personality(personality);
312 if (personality == tcp->currpers)
314 tcp->currpers = personality;
316 # if defined(POWERPC64)
318 static const char *const names[] = {"64 bit", "32 bit"};
319 fprintf(stderr, "[ Process PID=%d runs in %s mode. ]\n",
320 tcp->pid, names[personality]);
322 # elif defined(X86_64)
324 static const char *const names[] = {"64 bit", "32 bit", "x32"};
325 fprintf(stderr, "[ Process PID=%d runs in %s mode. ]\n",
326 tcp->pid, names[personality]);
330 static const char *const names[] = {"x32", "32 bit"};
331 fprintf(stderr, "[ Process PID=%d runs in %s mode. ]\n",
332 tcp->pid, names[personality]);
334 # elif defined(AARCH64)
336 static const char *const names[] = {"32-bit", "AArch64"};
337 fprintf(stderr, "[ Process PID=%d runs in %s mode. ]\n",
338 tcp->pid, names[personality]);
342 static const char *const names[] = {"64-bit", "32-bit"};
343 fprintf(stderr, "[ Process PID=%d runs in %s mode. ]\n",
344 tcp->pid, names[personality]);
350 static int qual_syscall(), qual_signal(), qual_desc();
352 static const struct qual_options {
353 unsigned int bitflag;
354 const char *option_name;
355 int (*qualify)(const char *, int, int);
356 const char *argument_name;
358 { QUAL_TRACE, "trace", qual_syscall, "system call" },
359 { QUAL_TRACE, "t", qual_syscall, "system call" },
360 { QUAL_ABBREV, "abbrev", qual_syscall, "system call" },
361 { QUAL_ABBREV, "a", qual_syscall, "system call" },
362 { QUAL_VERBOSE, "verbose", qual_syscall, "system call" },
363 { QUAL_VERBOSE, "v", qual_syscall, "system call" },
364 { QUAL_RAW, "raw", qual_syscall, "system call" },
365 { QUAL_RAW, "x", qual_syscall, "system call" },
366 { QUAL_SIGNAL, "signal", qual_signal, "signal" },
367 { QUAL_SIGNAL, "signals", qual_signal, "signal" },
368 { QUAL_SIGNAL, "s", qual_signal, "signal" },
369 { QUAL_READ, "read", qual_desc, "descriptor" },
370 { QUAL_READ, "reads", qual_desc, "descriptor" },
371 { QUAL_READ, "r", qual_desc, "descriptor" },
372 { QUAL_WRITE, "write", qual_desc, "descriptor" },
373 { QUAL_WRITE, "writes", qual_desc, "descriptor" },
374 { QUAL_WRITE, "w", qual_desc, "descriptor" },
375 { 0, NULL, NULL, NULL },
379 reallocate_qual(const unsigned int n)
383 for (p = 0; p < SUPPORTED_PERSONALITIES; p++) {
384 qp = qual_vec[p] = realloc(qual_vec[p], n * sizeof(qualbits_t));
387 memset(&qp[num_quals], 0, (n - num_quals) * sizeof(qualbits_t));
393 qualify_one(const unsigned int n, unsigned int bitflag, const int not, const int pers)
398 reallocate_qual(n + 1);
400 for (p = 0; p < SUPPORTED_PERSONALITIES; p++) {
401 if (pers == p || pers < 0) {
403 qual_vec[p][n] &= ~bitflag;
405 qual_vec[p][n] |= bitflag;
411 qual_syscall(const char *s, const unsigned int bitflag, const int not)
417 if (*s >= '0' && *s <= '9') {
418 i = string_to_uint(s);
419 if (i >= MAX_NSYSCALLS)
421 qualify_one(i, bitflag, not, -1);
425 for (p = 0; p < SUPPORTED_PERSONALITIES; p++) {
426 for (i = 0; i < nsyscall_vec[p]; i++) {
427 if (sysent_vec[p][i].sys_name
428 && strcmp(s, sysent_vec[p][i].sys_name) == 0
430 qualify_one(i, bitflag, not, p);
440 qual_signal(const char *s, const unsigned int bitflag, const int not)
444 if (*s >= '0' && *s <= '9') {
445 int signo = string_to_uint(s);
446 if (signo < 0 || signo > 255)
448 qualify_one(signo, bitflag, not, -1);
451 if (strncasecmp(s, "SIG", 3) == 0)
453 for (i = 0; i <= NSIG; i++) {
454 if (strcasecmp(s, signame(i) + 3) == 0) {
455 qualify_one(i, bitflag, not, -1);
463 qual_desc(const char *s, const unsigned int bitflag, const int not)
465 if (*s >= '0' && *s <= '9') {
466 int desc = string_to_uint(s);
467 if (desc < 0 || desc > 0x7fff) /* paranoia */
469 qualify_one(desc, bitflag, not, -1);
476 lookup_class(const char *s)
478 if (strcmp(s, "file") == 0)
480 if (strcmp(s, "ipc") == 0)
482 if (strcmp(s, "network") == 0)
483 return TRACE_NETWORK;
484 if (strcmp(s, "process") == 0)
485 return TRACE_PROCESS;
486 if (strcmp(s, "signal") == 0)
488 if (strcmp(s, "desc") == 0)
490 if (strcmp(s, "memory") == 0)
496 qualify(const char *s)
498 const struct qual_options *opt;
505 reallocate_qual(MIN_QUALS);
507 opt = &qual_options[0];
508 for (i = 0; (p = qual_options[i].option_name); i++) {
509 unsigned int len = strlen(p);
510 if (strncmp(s, p, len) == 0 && s[len] == '=') {
511 opt = &qual_options[i];
521 if (strcmp(s, "none") == 0) {
525 if (strcmp(s, "all") == 0) {
526 for (i = 0; i < num_quals; i++) {
527 qualify_one(i, opt->bitflag, not, -1);
531 for (i = 0; i < num_quals; i++) {
532 qualify_one(i, opt->bitflag, !not, -1);
537 for (p = strtok(copy, ","); p; p = strtok(NULL, ",")) {
539 if (opt->bitflag == QUAL_TRACE && (n = lookup_class(p)) > 0) {
541 for (pers = 0; pers < SUPPORTED_PERSONALITIES; pers++) {
542 for (i = 0; i < nsyscall_vec[pers]; i++)
543 if (sysent_vec[pers][i].sys_flags & n)
544 qualify_one(i, opt->bitflag, not, pers);
548 if (opt->qualify(p, opt->bitflag, not)) {
549 error_msg_and_die("invalid %s '%s'",
550 opt->argument_name, p);
557 #ifdef SYS_socket_subcall
559 decode_socket_subcall(struct tcb *tcp)
564 if (tcp->u_arg[0] < 0 || tcp->u_arg[0] >= SYS_socket_nsubcalls)
567 tcp->scno = SYS_socket_subcall + tcp->u_arg[0];
568 tcp->qual_flg = qual_flags[tcp->scno];
569 tcp->s_ent = &sysent[tcp->scno];
570 addr = tcp->u_arg[1];
571 n = tcp->s_ent->nargs;
572 if (sizeof(tcp->u_arg[0]) == current_wordsize) {
573 memset(tcp->u_arg, 0, n * sizeof(tcp->u_arg[0]));
574 (void) umoven(tcp, addr, n * sizeof(tcp->u_arg[0]), tcp->u_arg);
576 unsigned int args[n];
579 memset(args, 0, sizeof(args));
580 (void) umove(tcp, addr, &args);
581 for (i = 0; i < n; ++i)
582 tcp->u_arg[i] = args[i];
587 #ifdef SYS_ipc_subcall
589 decode_ipc_subcall(struct tcb *tcp)
593 if (tcp->u_arg[0] < 0 || tcp->u_arg[0] >= SYS_ipc_nsubcalls)
596 tcp->scno = SYS_ipc_subcall + tcp->u_arg[0];
597 tcp->qual_flg = qual_flags[tcp->scno];
598 tcp->s_ent = &sysent[tcp->scno];
599 n = tcp->s_ent->nargs;
600 for (i = 0; i < n; i++)
601 tcp->u_arg[i] = tcp->u_arg[i + 1];
606 printargs(struct tcb *tcp)
610 int n = tcp->s_ent->nargs;
611 for (i = 0; i < n; i++)
612 tprintf("%s%#lx", i ? ", " : "", tcp->u_arg[i]);
618 printargs_lu(struct tcb *tcp)
622 int n = tcp->s_ent->nargs;
623 for (i = 0; i < n; i++)
624 tprintf("%s%lu", i ? ", " : "", tcp->u_arg[i]);
630 printargs_ld(struct tcb *tcp)
634 int n = tcp->s_ent->nargs;
635 for (i = 0; i < n; i++)
636 tprintf("%s%ld", i ? ", " : "", tcp->u_arg[i]);
642 static struct user_regs_struct i386_regs;
643 long *const i386_esp_ptr = &i386_regs.esp;
644 # define ARCH_REGS_FOR_GETREGS i386_regs
645 #elif defined(X86_64) || defined(X32)
647 * On i386, pt_regs and user_regs_struct are the same,
648 * but on 64 bit x86, user_regs_struct has six more fields:
649 * fs_base, gs_base, ds, es, fs, gs.
650 * PTRACE_GETREGS fills them too, so struct pt_regs would overflow.
652 struct i386_user_regs_struct {
672 struct user_regs_struct x86_64_r;
673 struct i386_user_regs_struct i386_r;
675 # define x86_64_regs x86_regs_union.x86_64_r
676 # define i386_regs x86_regs_union.i386_r
677 uint32_t *const i386_esp_ptr = &i386_regs.esp;
678 uint64_t *const x86_64_rsp_ptr = (uint64_t *) &x86_64_regs.rsp;
679 static struct iovec x86_io = {
680 .iov_base = &x86_regs_union
682 # define ARCH_REGS_FOR_GETREGSET x86_regs_union
683 # define ARCH_IOVEC_FOR_GETREGSET x86_io
685 static struct pt_all_user_regs ia64_regs;
686 unsigned long *const ia64_frame_ptr = &ia64_regs.gr[12];
687 # define IA64_PSR_IS ((long)1 << 34)
688 # define ia64_ia32mode (ia64_regs.cr_ipsr & IA64_PSR_IS)
689 # define ARCH_REGS_FOR_GETREGS ia64_regs
690 #elif defined(POWERPC)
691 struct pt_regs ppc_regs; /* not static */
692 # define ARCH_REGS_FOR_GETREGS ppc_regs
698 static struct pt_regs arm_regs;
699 long *const arm_sp_ptr = &arm_regs.ARM_sp;
700 # define ARCH_REGS_FOR_GETREGS arm_regs
701 #elif defined(AARCH64)
705 # define ARM_cpsr uregs[16]
706 # define ARM_pc uregs[15]
707 # define ARM_lr uregs[14]
708 # define ARM_sp uregs[13]
709 # define ARM_ip uregs[12]
710 # define ARM_fp uregs[11]
711 # define ARM_r10 uregs[10]
712 # define ARM_r9 uregs[9]
713 # define ARM_r8 uregs[8]
714 # define ARM_r7 uregs[7]
715 # define ARM_r6 uregs[6]
716 # define ARM_r5 uregs[5]
717 # define ARM_r4 uregs[4]
718 # define ARM_r3 uregs[3]
719 # define ARM_r2 uregs[2]
720 # define ARM_r1 uregs[1]
721 # define ARM_r0 uregs[0]
722 # define ARM_ORIG_r0 uregs[17]
724 struct user_pt_regs aarch64_r;
725 struct arm_pt_regs arm_r;
727 # define aarch64_regs arm_regs_union.aarch64_r
728 # define arm_regs arm_regs_union.arm_r
729 uint64_t *const aarch64_sp_ptr = (uint64_t *) &aarch64_regs.sp;
730 uint32_t *const arm_sp_ptr = (uint32_t *) &arm_regs.ARM_sp;
731 static struct iovec aarch64_io = {
732 .iov_base = &arm_regs_union
734 # define ARCH_REGS_FOR_GETREGSET arm_regs_union
735 # define ARCH_IOVEC_FOR_GETREGSET aarch64_io
737 static long alpha_r0;
738 static long alpha_a3;
740 static struct pt_regs avr32_regs;
741 # define ARCH_REGS_FOR_GETREGS avr32_regs
742 #elif defined(SPARC) || defined(SPARC64)
743 struct pt_regs sparc_regs; /* not static */
744 # define ARCH_REGS_FOR_GETREGS sparc_regs
746 struct mips_regs mips_regs; /* not static */
747 /* PTRACE_GETREGS on MIPS is available since linux v2.6.15. */
748 # define ARCH_REGS_FOR_GETREGS mips_regs
749 #elif defined(S390) || defined(S390X)
750 /* PTRACE_GETREGSET on S390 is available since linux v2.6.27. */
751 static struct user_regs_struct s390_regset;
752 unsigned long *const s390_frame_ptr = &s390_regset.gprs[15];
753 # define ARCH_REGS_FOR_GETREGSET s390_regset
755 static long hppa_r28;
760 #elif defined(CRISV10) || defined(CRISV32)
761 static long cris_r10;
763 struct pt_regs tile_regs; /* not static */
764 # define ARCH_REGS_FOR_GETREGS tile_regs
765 #elif defined(MICROBLAZE)
766 static long microblaze_r3;
768 static struct user_regs_struct or1k_regs;
769 # define ARCH_REGS_FOR_GETREGSET or1k_regs
771 static struct user_gp_regs metag_regs;
772 # define ARCH_REGS_FOR_GETREGSET metag_regs
773 #elif defined(XTENSA)
774 static long xtensa_a2;
776 static struct user_regs_struct arc_regs;
777 # define ARCH_REGS_FOR_GETREGSET arc_regs
780 static long get_regs_error;
784 getrval2(struct tcb *tcp)
788 # if defined(SPARC) || defined(SPARC64)
789 val = sparc_regs.u_regs[U_REG_O1];
791 if (upeek(tcp->pid, 4*(REG_REG0+1), &val) < 0)
794 if (upeek(tcp->pid, 20, &val) < 0)
797 val = ia64_regs.gr[9];
805 print_pc(struct tcb *tcp)
810 #ifdef current_wordsize
811 # define pc_wordsize current_wordsize
813 # define pc_wordsize personality_wordsize[tcp->currpers]
816 if (pc_wordsize == 4) {
821 bad = "[????????????????] ";
825 #define PRINTBADPC tprints(bad)
827 if (get_regs_error) {
833 tprintf(fmt, i386_regs.eip);
834 #elif defined(X86_64) || defined(X32)
835 if (x86_io.iov_len == sizeof(i386_regs))
836 tprintf(fmt, (unsigned long) i386_regs.eip);
838 tprintf(fmt, (unsigned long) x86_64_regs.rip);
839 #elif defined(S390) || defined(S390X)
840 tprintf(fmt, s390_regset.psw.addr);
842 tprintf(fmt, ia64_regs.br[0]);
843 #elif defined(POWERPC)
844 tprintf(fmt, ppc_regs.nip);
847 if (upeek(tcp->pid, 4*PT_PC, &pc) < 0) {
854 if (upeek(tcp->pid, REG_PC, &pc) < 0) {
860 tprintf(fmt, sparc_regs.pc);
861 #elif defined(SPARC64)
862 tprintf(fmt, sparc_regs.tpc);
865 if (upeek(tcp->pid, PT_IAOQ0, &pc) < 0) {
871 tprintf(fmt, (unsigned long) mips_REG_EPC);
874 if (upeek(tcp->pid, 4*REG_PC, &pc) < 0) {
881 if (upeek(tcp->pid, REG_PC, &pc) < 0) {
886 #elif defined(AARCH64)
887 if (aarch64_io.iov_len == sizeof(arm_regs))
888 tprintf(fmt, (unsigned long) arm_regs.ARM_pc);
890 tprintf(fmt, (unsigned long) aarch64_regs.pc);
892 tprintf(fmt, arm_regs.ARM_pc);
894 tprintf(fmt, avr32_regs.pc);
897 if (upeek(tcp->pid, PT_PC, &pc) < 0) {
902 #elif defined(CRISV10)
904 if (upeek(tcp->pid, 4*PT_IRP, &pc) < 0) {
909 #elif defined(CRISV32)
911 if (upeek(tcp->pid, 4*PT_ERP, &pc) < 0) {
917 tprintf(fmt, (unsigned long) tile_regs.pc);
919 tprintf(fmt, or1k_regs.pc);
921 tprintf(fmt, metag_regs.pc);
922 #elif defined(XTENSA)
924 if (upeek(tcp->pid, REG_PC, &pc) < 0) {
930 tprintf(fmt, arc_regs.efa);
932 # warning print_pc is not implemented for this architecture
934 #endif /* architecture */
938 * Shuffle syscall numbers so that we don't have huge gaps in syscall table.
939 * The shuffling should be an involution: shuffle_scno(shuffle_scno(n)) == n.
941 #if defined(ARM) || defined(AARCH64) /* So far only 32-bit ARM needs this */
943 shuffle_scno(unsigned long scno)
945 if (scno < ARM_FIRST_SHUFFLED_SYSCALL)
948 /* __ARM_NR_cmpxchg? Swap with LAST_ORDINARY+1 */
949 if (scno == ARM_FIRST_SHUFFLED_SYSCALL)
951 if (scno == 0x000ffff0)
952 return ARM_FIRST_SHUFFLED_SYSCALL;
954 #define ARM_SECOND_SHUFFLED_SYSCALL (ARM_FIRST_SHUFFLED_SYSCALL + 1)
956 * Is it ARM specific syscall?
957 * Swap [0x000f0000, 0x000f0000 + LAST_SPECIAL] range
958 * with [SECOND_SHUFFLED, SECOND_SHUFFLED + LAST_SPECIAL] range.
960 if (scno >= 0x000f0000 &&
961 scno <= 0x000f0000 + ARM_LAST_SPECIAL_SYSCALL) {
962 return scno - 0x000f0000 + ARM_SECOND_SHUFFLED_SYSCALL;
964 if (scno <= ARM_SECOND_SHUFFLED_SYSCALL + ARM_LAST_SPECIAL_SYSCALL) {
965 return scno + 0x000f0000 - ARM_SECOND_SHUFFLED_SYSCALL;
971 # define shuffle_scno(scno) ((long)(scno))
975 undefined_scno_name(struct tcb *tcp)
977 static char buf[sizeof("syscall_%lu") + sizeof(long)*3];
979 sprintf(buf, "syscall_%lu", shuffle_scno(tcp->scno));
985 * PTRACE_GETREGS was added to the PowerPC kernel in v2.6.23,
986 * we provide a slow fallback for old kernels.
988 static int powerpc_getregs_old(pid_t pid)
994 r = upeek(pid, sizeof(long) * PT_NIP, (long *)&ppc_regs.nip);
998 #ifdef POWERPC64 /* else we never use it */
999 r = upeek(pid, sizeof(long) * PT_MSR, (long *)&ppc_regs.msr);
1003 r = upeek(pid, sizeof(long) * PT_CCR, (long *)&ppc_regs.ccr);
1006 r = upeek(pid, sizeof(long) * PT_ORIG_R3, (long *)&ppc_regs.orig_gpr3);
1009 for (i = 0; i <= 8; i++) {
1010 r = upeek(pid, sizeof(long) * (PT_R0 + i),
1011 (long *)&ppc_regs.gpr[i]);
1023 get_regs_error = -1;
1026 #if defined ARCH_REGS_FOR_GETREGSET
1028 get_regset(pid_t pid)
1030 # ifdef ARCH_IOVEC_FOR_GETREGSET
1031 /* variable iovec */
1032 ARCH_IOVEC_FOR_GETREGSET.iov_len = sizeof(ARCH_REGS_FOR_GETREGSET);
1033 return ptrace(PTRACE_GETREGSET, pid, NT_PRSTATUS,
1034 &ARCH_IOVEC_FOR_GETREGSET);
1036 /* constant iovec */
1037 static struct iovec io = {
1038 .iov_base = &ARCH_REGS_FOR_GETREGSET,
1039 .iov_len = sizeof(ARCH_REGS_FOR_GETREGSET)
1041 return ptrace(PTRACE_GETREGSET, pid, NT_PRSTATUS, &io);
1045 #endif /* ARCH_REGS_FOR_GETREGSET */
1050 #ifdef ARCH_REGS_FOR_GETREGSET
1052 /* Try PTRACE_GETREGSET first, fallback to PTRACE_GETREGS. */
1053 static int getregset_support;
1055 if (getregset_support >= 0) {
1056 get_regs_error = get_regset(pid);
1057 if (getregset_support > 0)
1059 if (get_regs_error >= 0) {
1060 getregset_support = 1;
1063 if (errno == EPERM || errno == ESRCH)
1065 getregset_support = -1;
1067 /* Use old method, with unreliable heuristical detection of 32-bitness. */
1068 x86_io.iov_len = sizeof(x86_64_regs);
1069 get_regs_error = ptrace(PTRACE_GETREGS, pid, NULL, &x86_64_regs);
1070 if (!get_regs_error && x86_64_regs.cs == 0x23) {
1071 x86_io.iov_len = sizeof(i386_regs);
1073 * The order is important: i386_regs and x86_64_regs
1074 * are overlaid in memory!
1076 i386_regs.ebx = x86_64_regs.rbx;
1077 i386_regs.ecx = x86_64_regs.rcx;
1078 i386_regs.edx = x86_64_regs.rdx;
1079 i386_regs.esi = x86_64_regs.rsi;
1080 i386_regs.edi = x86_64_regs.rdi;
1081 i386_regs.ebp = x86_64_regs.rbp;
1082 i386_regs.eax = x86_64_regs.rax;
1083 /* i386_regs.xds = x86_64_regs.ds; unused by strace */
1084 /* i386_regs.xes = x86_64_regs.es; ditto... */
1085 /* i386_regs.xfs = x86_64_regs.fs; */
1086 /* i386_regs.xgs = x86_64_regs.gs; */
1087 i386_regs.orig_eax = x86_64_regs.orig_rax;
1088 i386_regs.eip = x86_64_regs.rip;
1089 /* i386_regs.xcs = x86_64_regs.cs; */
1090 /* i386_regs.eflags = x86_64_regs.eflags; */
1091 i386_regs.esp = x86_64_regs.rsp;
1092 /* i386_regs.xss = x86_64_regs.ss; */
1094 # else /* !X86_64 */
1095 /* Assume that PTRACE_GETREGSET works. */
1096 get_regs_error = get_regset(pid);
1098 #elif defined ARCH_REGS_FOR_GETREGS
1099 # if defined SPARC || defined SPARC64
1100 /* SPARC systems have the meaning of data and addr reversed */
1101 get_regs_error = ptrace(PTRACE_GETREGS, pid, (char *)&ARCH_REGS_FOR_GETREGS, 0);
1102 # elif defined POWERPC
1103 static bool old_kernel = 0;
1106 get_regs_error = ptrace(PTRACE_GETREGS, pid, NULL, &ARCH_REGS_FOR_GETREGS);
1107 if (get_regs_error && errno == EIO) {
1110 get_regs_error = powerpc_getregs_old(pid);
1113 /* Assume that PTRACE_GETREGS works. */
1114 get_regs_error = ptrace(PTRACE_GETREGS, pid, NULL, &ARCH_REGS_FOR_GETREGS);
1117 #else /* !ARCH_REGS_FOR_GETREGSET && !ARCH_REGS_FOR_GETREGS */
1118 # warning get_regs is not implemented for this architecture yet
1124 * 0: "ignore this ptrace stop", bail out of trace_syscall_entering() silently.
1125 * 1: ok, continue in trace_syscall_entering().
1126 * other: error, trace_syscall_entering() should print error indicator
1127 * ("????" etc) and bail out.
1130 get_scno(struct tcb *tcp)
1134 #if defined(S390) || defined(S390X)
1135 scno = s390_regset.gprs[2];
1136 #elif defined(POWERPC)
1137 scno = ppc_regs.gpr[0];
1139 unsigned int currpers;
1142 * Check for 64/32 bit mode.
1143 * Embedded implementations covered by Book E extension of PPC use
1144 * bit 0 (CM) of 32-bit Machine state register (MSR).
1145 * Other implementations use bit 0 (SF) of 64-bit MSR.
1147 currpers = (ppc_regs.msr & 0x8000000080000000) ? 0 : 1;
1148 update_personality(tcp, currpers);
1150 #elif defined(AVR32)
1151 scno = avr32_regs.r8;
1153 if (upeek(tcp->pid, PT_ORIG_P0, &scno))
1156 scno = i386_regs.orig_eax;
1157 #elif defined(X86_64) || defined(X32)
1158 # ifndef __X32_SYSCALL_BIT
1159 # define __X32_SYSCALL_BIT 0x40000000
1161 unsigned int currpers;
1163 /* GETREGSET of NT_PRSTATUS tells us regset size,
1164 * which unambiguously detects i386.
1166 * Linux kernel distinguishes x86-64 and x32 processes
1167 * solely by looking at __X32_SYSCALL_BIT:
1168 * arch/x86/include/asm/compat.h::is_x32_task():
1169 * if (task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT)
1172 if (x86_io.iov_len == sizeof(i386_regs)) {
1173 scno = i386_regs.orig_eax;
1176 scno = x86_64_regs.orig_rax;
1178 if (scno & __X32_SYSCALL_BIT) {
1180 * Syscall number -1 requires special treatment:
1181 * it might be a side effect of SECCOMP_RET_ERRNO
1182 * filtering that sets orig_rax to -1
1183 * in some versions of linux kernel.
1184 * If that is the case, then
1185 * __X32_SYSCALL_BIT logic does not apply.
1187 if ((long long) x86_64_regs.orig_rax != -1) {
1188 scno -= __X32_SYSCALL_BIT;
1198 /* cs = 0x33 for long mode (native 64 bit and x32)
1199 * cs = 0x23 for compatibility mode (32 bit)
1200 * ds = 0x2b for x32 mode (x86-64 in 32 bit)
1202 scno = x86_64_regs.orig_rax;
1203 switch (x86_64_regs.cs) {
1204 case 0x23: currpers = 1; break;
1206 if (x86_64_regs.ds == 0x2b) {
1208 scno &= ~__X32_SYSCALL_BIT;
1213 fprintf(stderr, "Unknown value CS=0x%08X while "
1214 "detecting personality of process "
1215 "PID=%d\n", (int)x86_64_regs.cs, tcp->pid);
1216 currpers = current_personality;
1220 /* This version analyzes the opcode of a syscall instruction.
1221 * (int 0x80 on i386 vs. syscall on x86-64)
1222 * It works, but is too complicated, and strictly speaking, unreliable.
1224 unsigned long call, rip = x86_64_regs.rip;
1225 /* sizeof(syscall) == sizeof(int 0x80) == 2 */
1228 call = ptrace(PTRACE_PEEKTEXT, tcp->pid, (char *)rip, (char *)0);
1230 fprintf(stderr, "ptrace_peektext failed: %s\n",
1232 switch (call & 0xffff) {
1233 /* x86-64: syscall = 0x0f 0x05 */
1234 case 0x050f: currpers = 0; break;
1235 /* i386: int 0x80 = 0xcd 0x80 */
1236 case 0x80cd: currpers = 1; break;
1238 currpers = current_personality;
1240 "Unknown syscall opcode (0x%04X) while "
1241 "detecting personality of process "
1242 "PID=%d\n", (int)call, tcp->pid);
1248 /* If we are built for a x32 system, then personality 0 is x32
1249 * (not x86_64), and stracing of x86_64 apps is not supported.
1250 * Stracing of i386 apps is still supported.
1252 if (currpers == 0) {
1253 fprintf(stderr, "syscall_%lu(...) in unsupported "
1254 "64-bit mode of process PID=%d\n",
1258 currpers &= ~2; /* map 2,1 to 0,1 */
1260 update_personality(tcp, currpers);
1262 if (ia64_ia32mode) {
1263 scno = ia64_regs.gr[0];
1265 scno = ia64_regs.gr[15];
1267 #elif defined(AARCH64)
1268 switch (aarch64_io.iov_len) {
1269 case sizeof(aarch64_regs):
1270 /* We are in 64-bit mode */
1271 scno = aarch64_regs.regs[8];
1272 update_personality(tcp, 1);
1274 case sizeof(arm_regs):
1275 /* We are in 32-bit mode */
1276 /* Note: we don't support OABI, unlike 32-bit ARM build */
1277 scno = arm_regs.ARM_r7;
1278 scno = shuffle_scno(scno);
1279 update_personality(tcp, 0);
1283 if (arm_regs.ARM_ip != 0) {
1284 /* It is not a syscall entry */
1285 fprintf(stderr, "pid %d stray syscall exit\n", tcp->pid);
1286 tcp->flags |= TCB_INSYSCALL;
1289 /* Note: we support only 32-bit CPUs, not 26-bit */
1291 # if !defined(__ARM_EABI__) || ENABLE_ARM_OABI
1292 if (arm_regs.ARM_cpsr & 0x20)
1296 /* Check EABI/OABI by examining SVC insn's low 24 bits */
1298 scno = ptrace(PTRACE_PEEKTEXT, tcp->pid, (void *)(arm_regs.ARM_pc - 4), NULL);
1301 /* EABI syscall convention? */
1302 if ((unsigned long) scno != 0xef000000) {
1304 if ((scno & 0x0ff00000) != 0x0f900000) {
1305 fprintf(stderr, "pid %d unknown syscall trap 0x%08lx\n",
1309 /* Fixup the syscall number */
1313 scno = arm_regs.ARM_r7;
1315 # else /* __ARM_EABI__ || !ENABLE_ARM_OABI */
1316 scno = arm_regs.ARM_r7;
1318 scno = shuffle_scno(scno);
1320 if (upeek(tcp->pid, 4*PT_ORIG_D0, &scno) < 0)
1325 if (!SCNO_IN_RANGE(scno)) {
1326 if (mips_REG_A3 == 0 || mips_REG_A3 == (uint64_t) -1) {
1328 fprintf(stderr, "stray syscall exit: v0 = %ld\n", scno);
1332 #elif defined(ALPHA)
1333 if (upeek(tcp->pid, REG_A3, &alpha_a3) < 0)
1335 if (upeek(tcp->pid, REG_R0, &scno) < 0)
1339 * Do some sanity checks to figure out if it's
1340 * really a syscall entry
1342 if (!SCNO_IN_RANGE(scno)) {
1343 if (alpha_a3 == 0 || alpha_a3 == -1) {
1345 fprintf(stderr, "stray syscall exit: r0 = %ld\n", scno);
1349 #elif defined(SPARC) || defined(SPARC64)
1350 /* Disassemble the syscall trap. */
1351 /* Retrieve the syscall trap instruction. */
1354 # if defined(SPARC64)
1355 trap = ptrace(PTRACE_PEEKTEXT, tcp->pid, (char *)sparc_regs.tpc, 0);
1358 trap = ptrace(PTRACE_PEEKTEXT, tcp->pid, (char *)sparc_regs.pc, 0);
1363 /* Disassemble the trap to see what personality to use. */
1366 /* Linux/SPARC syscall trap. */
1367 update_personality(tcp, 0);
1370 /* Linux/SPARC64 syscall trap. */
1371 update_personality(tcp, 2);
1374 /* SunOS syscall trap. (pers 1) */
1375 fprintf(stderr, "syscall: SunOS no support\n");
1378 /* Solaris 2.x syscall trap. (per 2) */
1379 update_personality(tcp, 1);
1382 /* NetBSD/FreeBSD syscall trap. */
1383 fprintf(stderr, "syscall: NetBSD/FreeBSD not supported\n");
1386 /* Solaris 2.x gettimeofday */
1387 update_personality(tcp, 1);
1390 # if defined(SPARC64)
1391 fprintf(stderr, "syscall: unknown syscall trap %08lx %016lx\n", trap, sparc_regs.tpc);
1393 fprintf(stderr, "syscall: unknown syscall trap %08lx %08lx\n", trap, sparc_regs.pc);
1398 /* Extract the system call number from the registers. */
1399 if (trap == 0x91d02027)
1402 scno = sparc_regs.u_regs[U_REG_G1];
1404 scno = sparc_regs.u_regs[U_REG_O0];
1405 memmove(&sparc_regs.u_regs[U_REG_O0], &sparc_regs.u_regs[U_REG_O1], 7*sizeof(sparc_regs.u_regs[0]));
1408 if (upeek(tcp->pid, PT_GR20, &scno) < 0)
1412 * In the new syscall ABI, the system call number is in R3.
1414 if (upeek(tcp->pid, 4*(REG_REG0+3), &scno) < 0)
1418 /* Odd as it may seem, a glibc bug has been known to cause
1419 glibc to issue bogus negative syscall numbers. So for
1420 our purposes, make strace print what it *should* have been */
1421 long correct_scno = (scno & 0xff);
1424 "Detected glibc bug: bogus system call"
1425 " number = %ld, correcting to %ld\n",
1428 scno = correct_scno;
1431 if (upeek(tcp->pid, REG_SYSCALL, &scno) < 0)
1434 #elif defined(CRISV10) || defined(CRISV32)
1435 if (upeek(tcp->pid, 4*PT_R9, &scno) < 0)
1438 unsigned int currpers;
1439 scno = tile_regs.regs[10];
1443 # ifndef PT_FLAGS_COMPAT
1444 # define PT_FLAGS_COMPAT 0x10000 /* from Linux 3.8 on */
1446 if (tile_regs.flags & PT_FLAGS_COMPAT)
1451 update_personality(tcp, currpers);
1452 #elif defined(MICROBLAZE)
1453 if (upeek(tcp->pid, 0, &scno) < 0)
1456 scno = or1k_regs.gpr[11];
1457 #elif defined(METAG)
1458 scno = metag_regs.dx[0][1]; /* syscall number in D1Re0 (D1.0) */
1459 #elif defined(XTENSA)
1460 if (upeek(tcp->pid, SYSCALL_NR, &scno) < 0)
1463 scno = arc_regs.scratch.r8;
1467 if (SCNO_IS_VALID(tcp->scno)) {
1468 tcp->s_ent = &sysent[scno];
1469 tcp->qual_flg = qual_flags[scno];
1471 static const struct_sysent unknown = {
1474 .sys_func = printargs,
1475 .sys_name = "unknown", /* not used */
1477 tcp->s_ent = &unknown;
1478 tcp->qual_flg = UNDEFINED_SCNO | QUAL_RAW | DEFAULT_QUAL_FLAGS;
1484 * Cannot rely on __kernel_[u]long_t being defined,
1485 * it is quite a recent feature of <asm/posix_types.h>.
1487 #ifdef __kernel_long_t
1488 typedef __kernel_long_t kernel_long_t;
1489 typedef __kernel_ulong_t kernel_ulong_t;
1492 typedef long long kernel_long_t;
1493 typedef unsigned long long kernel_ulong_t;
1495 typedef long kernel_long_t;
1496 typedef unsigned long kernel_ulong_t;
1501 * Check the syscall return value register value for whether it is
1502 * a negated errno code indicating an error, or a success return value.
1505 is_negated_errno(kernel_ulong_t val)
1507 /* Linux kernel defines MAX_ERRNO to 4095. */
1508 kernel_ulong_t max = -(kernel_long_t) 4095;
1510 #if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
1511 if (current_wordsize < sizeof(val)) {
1512 val = (uint32_t) val;
1513 max = (uint32_t) max;
1517 * current_wordsize is 4 even in personality 0 (native X32)
1518 * but truncation _must not_ be done in it.
1519 * can't check current_wordsize here!
1521 if (current_personality != 0) {
1522 val = (uint32_t) val;
1523 max = (uint32_t) max;
1530 /* Return -1 on error or 1 on success (never 0!) */
1532 get_syscall_args(struct tcb *tcp)
1536 nargs = tcp->s_ent->nargs;
1538 #if defined(S390) || defined(S390X)
1541 tcp->u_arg[0] = s390_regset.orig_gpr2;
1542 tcp->u_arg[1] = s390_regset.gprs[3];
1543 tcp->u_arg[2] = s390_regset.gprs[4];
1544 tcp->u_arg[3] = s390_regset.gprs[5];
1545 tcp->u_arg[4] = s390_regset.gprs[6];
1546 tcp->u_arg[5] = s390_regset.gprs[7];
1547 #elif defined(ALPHA)
1548 for (i = 0; i < nargs; ++i)
1549 if (upeek(tcp->pid, REG_A0+i, &tcp->u_arg[i]) < 0)
1552 if (!ia64_ia32mode) {
1553 unsigned long *rbs_end =
1554 (unsigned long *) ia64_regs.ar[PT_AUR_BSP];
1555 unsigned long sof = (ia64_regs.cfm >> 0) & 0x7f;
1556 unsigned long sol = (ia64_regs.cfm >> 7) & 0x7f;
1557 unsigned long *out0 = ia64_rse_skip_regs(rbs_end, -sof + sol);
1559 for (i = 0; i < nargs; ++i) {
1560 if (umoven(tcp, (unsigned long) ia64_rse_skip_regs(out0, i),
1561 sizeof(long), &tcp->u_arg[i]) < 0)
1567 /* truncate away IVE sign-extension */
1568 tcp->u_arg[0] = 0xffffffff & ia64_regs.gr[11]; /* EBX */
1569 tcp->u_arg[1] = 0xffffffff & ia64_regs.gr[ 9]; /* ECX */
1570 tcp->u_arg[2] = 0xffffffff & ia64_regs.gr[10]; /* EDX */
1571 tcp->u_arg[3] = 0xffffffff & ia64_regs.gr[14]; /* ESI */
1572 tcp->u_arg[4] = 0xffffffff & ia64_regs.gr[15]; /* EDI */
1573 tcp->u_arg[5] = 0xffffffff & ia64_regs.gr[13]; /* EBP */
1575 #elif defined LINUX_MIPSN64
1578 tcp->u_arg[0] = mips_REG_A0;
1579 tcp->u_arg[1] = mips_REG_A1;
1580 tcp->u_arg[2] = mips_REG_A2;
1581 tcp->u_arg[3] = mips_REG_A3;
1582 tcp->u_arg[4] = mips_REG_A4;
1583 tcp->u_arg[5] = mips_REG_A5;
1584 #elif defined LINUX_MIPSN32
1587 tcp->u_arg[0] = tcp->ext_arg[0] = mips_REG_A0;
1588 tcp->u_arg[1] = tcp->ext_arg[1] = mips_REG_A1;
1589 tcp->u_arg[2] = tcp->ext_arg[2] = mips_REG_A2;
1590 tcp->u_arg[3] = tcp->ext_arg[3] = mips_REG_A3;
1591 tcp->u_arg[4] = tcp->ext_arg[4] = mips_REG_A4;
1592 tcp->u_arg[5] = tcp->ext_arg[5] = mips_REG_A5;
1593 #elif defined LINUX_MIPSO32
1596 tcp->u_arg[0] = mips_REG_A0;
1597 tcp->u_arg[1] = mips_REG_A1;
1598 tcp->u_arg[2] = mips_REG_A2;
1599 tcp->u_arg[3] = mips_REG_A3;
1601 umoven(tcp, mips_REG_SP + 4 * 4,
1602 (nargs - 4) * sizeof(tcp->u_arg[0]),
1605 #elif defined(POWERPC)
1608 tcp->u_arg[0] = ppc_regs.orig_gpr3;
1609 tcp->u_arg[1] = ppc_regs.gpr[4];
1610 tcp->u_arg[2] = ppc_regs.gpr[5];
1611 tcp->u_arg[3] = ppc_regs.gpr[6];
1612 tcp->u_arg[4] = ppc_regs.gpr[7];
1613 tcp->u_arg[5] = ppc_regs.gpr[8];
1614 #elif defined(SPARC) || defined(SPARC64)
1615 for (i = 0; i < nargs; ++i)
1616 tcp->u_arg[i] = sparc_regs.u_regs[U_REG_O0 + i];
1618 for (i = 0; i < nargs; ++i)
1619 if (upeek(tcp->pid, PT_GR26-4*i, &tcp->u_arg[i]) < 0)
1621 #elif defined(ARM) || defined(AARCH64)
1622 # if defined(AARCH64)
1623 if (tcp->currpers == 1)
1624 for (i = 0; i < nargs; ++i)
1625 tcp->u_arg[i] = aarch64_regs.regs[i];
1628 for (i = 0; i < nargs; ++i)
1629 tcp->u_arg[i] = arm_regs.uregs[i];
1630 #elif defined(AVR32)
1633 tcp->u_arg[0] = avr32_regs.r12;
1634 tcp->u_arg[1] = avr32_regs.r11;
1635 tcp->u_arg[2] = avr32_regs.r10;
1636 tcp->u_arg[3] = avr32_regs.r9;
1637 tcp->u_arg[4] = avr32_regs.r5;
1638 tcp->u_arg[5] = avr32_regs.r3;
1640 static const int argreg[MAX_ARGS] = { PT_R0, PT_R1, PT_R2, PT_R3, PT_R4, PT_R5 };
1642 for (i = 0; i < nargs; ++i)
1643 if (upeek(tcp->pid, argreg[i], &tcp->u_arg[i]) < 0)
1646 static const int syscall_regs[MAX_ARGS] = {
1647 4 * (REG_REG0+4), 4 * (REG_REG0+5), 4 * (REG_REG0+6),
1648 4 * (REG_REG0+7), 4 * (REG_REG0 ), 4 * (REG_REG0+1)
1651 for (i = 0; i < nargs; ++i)
1652 if (upeek(tcp->pid, syscall_regs[i], &tcp->u_arg[i]) < 0)
1656 /* Registers used by SH5 Linux system calls for parameters */
1657 static const int syscall_regs[MAX_ARGS] = { 2, 3, 4, 5, 6, 7 };
1659 for (i = 0; i < nargs; ++i)
1660 if (upeek(tcp->pid, REG_GENERAL(syscall_regs[i]), &tcp->u_arg[i]) < 0)
1665 tcp->u_arg[0] = i386_regs.ebx;
1666 tcp->u_arg[1] = i386_regs.ecx;
1667 tcp->u_arg[2] = i386_regs.edx;
1668 tcp->u_arg[3] = i386_regs.esi;
1669 tcp->u_arg[4] = i386_regs.edi;
1670 tcp->u_arg[5] = i386_regs.ebp;
1671 #elif defined(X86_64) || defined(X32)
1674 if (x86_io.iov_len != sizeof(i386_regs)) {
1675 /* x86-64 or x32 ABI */
1676 tcp->u_arg[0] = x86_64_regs.rdi;
1677 tcp->u_arg[1] = x86_64_regs.rsi;
1678 tcp->u_arg[2] = x86_64_regs.rdx;
1679 tcp->u_arg[3] = x86_64_regs.r10;
1680 tcp->u_arg[4] = x86_64_regs.r8;
1681 tcp->u_arg[5] = x86_64_regs.r9;
1683 tcp->ext_arg[0] = x86_64_regs.rdi;
1684 tcp->ext_arg[1] = x86_64_regs.rsi;
1685 tcp->ext_arg[2] = x86_64_regs.rdx;
1686 tcp->ext_arg[3] = x86_64_regs.r10;
1687 tcp->ext_arg[4] = x86_64_regs.r8;
1688 tcp->ext_arg[5] = x86_64_regs.r9;
1692 /* Zero-extend from 32 bits */
1693 /* Use widen_to_long(tcp->u_arg[N]) in syscall handlers
1694 * if you need to use *sign-extended* parameter.
1696 tcp->u_arg[0] = (long)(uint32_t)i386_regs.ebx;
1697 tcp->u_arg[1] = (long)(uint32_t)i386_regs.ecx;
1698 tcp->u_arg[2] = (long)(uint32_t)i386_regs.edx;
1699 tcp->u_arg[3] = (long)(uint32_t)i386_regs.esi;
1700 tcp->u_arg[4] = (long)(uint32_t)i386_regs.edi;
1701 tcp->u_arg[5] = (long)(uint32_t)i386_regs.ebp;
1703 #elif defined(MICROBLAZE)
1704 for (i = 0; i < nargs; ++i)
1705 if (upeek(tcp->pid, (5 + i) * 4, &tcp->u_arg[i]) < 0)
1707 #elif defined(CRISV10) || defined(CRISV32)
1708 static const int crisregs[MAX_ARGS] = {
1709 4*PT_ORIG_R10, 4*PT_R11, 4*PT_R12,
1710 4*PT_R13 , 4*PT_MOF, 4*PT_SRP
1713 for (i = 0; i < nargs; ++i)
1714 if (upeek(tcp->pid, crisregs[i], &tcp->u_arg[i]) < 0)
1717 for (i = 0; i < nargs; ++i)
1718 tcp->u_arg[i] = tile_regs.regs[i];
1720 for (i = 0; i < nargs; ++i)
1721 if (upeek(tcp->pid, (i < 5 ? i : i + 2)*4, &tcp->u_arg[i]) < 0)
1725 for (i = 0; i < 6; ++i)
1726 tcp->u_arg[i] = or1k_regs.gpr[3 + i];
1727 #elif defined(METAG)
1728 for (i = 0; i < nargs; i++)
1729 /* arguments go backwards from D1Ar1 (D1.3) */
1730 tcp->u_arg[i] = ((unsigned long *)&metag_regs.dx[3][1])[-i];
1731 #elif defined(XTENSA)
1732 /* arg0: a6, arg1: a3, arg2: a4, arg3: a5, arg4: a8, arg5: a9 */
1733 static const int xtensaregs[MAX_ARGS] = { 6, 3, 4, 5, 8, 9 };
1734 for (i = 0; i < nargs; ++i)
1735 if (upeek(tcp->pid, REG_A_BASE + xtensaregs[i], &tcp->u_arg[i]) < 0)
1738 long *arc_args = &arc_regs.scratch.r0;
1739 for (i = 0; i < nargs; ++i)
1740 tcp->u_arg[i] = *arc_args--;
1742 #else /* Other architecture (32bits specific) */
1743 for (i = 0; i < nargs; ++i)
1744 if (upeek(tcp->pid, i*4, &tcp->u_arg[i]) < 0)
1751 trace_syscall_entering(struct tcb *tcp)
1755 scno_good = res = (get_regs_error ? -1 : get_scno(tcp));
1759 res = get_syscall_args(tcp);
1764 tprints("????" /* anti-trigraph gap */ "(");
1765 else if (tcp->qual_flg & UNDEFINED_SCNO)
1766 tprintf("%s(", undefined_scno_name(tcp));
1768 tprintf("%s(", tcp->s_ent->sys_name);
1770 * " <unavailable>" will be added later by the code which
1771 * detects ptrace errors.
1776 if ( sys_execve == tcp->s_ent->sys_func
1777 # if defined(SPARC) || defined(SPARC64)
1778 || sys_execv == tcp->s_ent->sys_func
1781 hide_log_until_execve = 0;
1784 #if defined(SYS_socket_subcall) || defined(SYS_ipc_subcall)
1786 # ifdef SYS_socket_subcall
1787 if (tcp->s_ent->sys_func == sys_socketcall) {
1788 decode_socket_subcall(tcp);
1792 # ifdef SYS_ipc_subcall
1793 if (tcp->s_ent->sys_func == sys_ipc) {
1794 decode_ipc_subcall(tcp);
1802 if (!(tcp->qual_flg & QUAL_TRACE)
1803 || (tracing_paths && !pathtrace_match(tcp))
1805 tcp->flags |= TCB_INSYSCALL | TCB_FILTERED;
1809 tcp->flags &= ~TCB_FILTERED;
1811 if (cflag == CFLAG_ONLY_STATS || hide_log_until_execve) {
1816 #ifdef USE_LIBUNWIND
1817 if (stack_trace_enabled) {
1818 if (tcp->s_ent->sys_flags & STACKTRACE_CAPTURE_ON_ENTER)
1819 unwind_capture_stacktrace(tcp);
1824 if (tcp->qual_flg & UNDEFINED_SCNO)
1825 tprintf("%s(", undefined_scno_name(tcp));
1827 tprintf("%s(", tcp->s_ent->sys_name);
1828 if ((tcp->qual_flg & QUAL_RAW) && tcp->s_ent->sys_func != sys_exit)
1829 res = printargs(tcp);
1831 res = tcp->s_ent->sys_func(tcp);
1835 tcp->flags |= TCB_INSYSCALL;
1836 /* Measure the entrance time as late as possible to avoid errors. */
1838 gettimeofday(&tcp->etime, NULL);
1843 * 1: ok, continue in trace_syscall_exiting().
1844 * -1: error, trace_syscall_exiting() should print error indicator
1845 * ("????" etc) and bail out.
1848 get_syscall_result(struct tcb *tcp)
1850 #if defined ARCH_REGS_FOR_GETREGSET || defined ARCH_REGS_FOR_GETREGS
1851 /* already done by get_regs */
1853 if (upeek(tcp->pid, PT_R0, &bfin_r0) < 0)
1856 if (upeek(tcp->pid, 4*PT_D0, &m68k_d0) < 0)
1858 #elif defined(ALPHA)
1859 if (upeek(tcp->pid, REG_A3, &alpha_a3) < 0)
1861 if (upeek(tcp->pid, REG_R0, &alpha_r0) < 0)
1864 if (upeek(tcp->pid, PT_GR28, &hppa_r28) < 0)
1867 /* new syscall ABI returns result in R0 */
1868 if (upeek(tcp->pid, 4*REG_REG0, (long *)&sh_r0) < 0)
1871 /* ABI defines result returned in r9 */
1872 if (upeek(tcp->pid, REG_GENERAL(9), (long *)&sh64_r9) < 0)
1874 #elif defined(CRISV10) || defined(CRISV32)
1875 if (upeek(tcp->pid, 4*PT_R10, &cris_r10) < 0)
1877 #elif defined(MICROBLAZE)
1878 if (upeek(tcp->pid, 3 * 4, µblaze_r3) < 0)
1880 #elif defined(XTENSA)
1881 if (upeek(tcp->pid, REG_A_BASE + 2, &xtensa_a2) < 0)
1884 # error get_syscall_result is not implemented for this architecture
1890 * 1: ok, continue in trace_syscall_exiting().
1891 * -1: error, trace_syscall_exiting() should print error indicator
1892 * ("????" etc) and bail out.
1895 get_error(struct tcb *tcp)
1898 int check_errno = 1;
1899 if (tcp->s_ent->sys_flags & SYSCALL_NEVER_FAILS) {
1902 #if defined(S390) || defined(S390X)
1903 if (check_errno && is_negated_errno(s390_regset.gprs[2])) {
1905 u_error = -s390_regset.gprs[2];
1908 tcp->u_rval = s390_regset.gprs[2];
1911 if (check_errno && is_negated_errno(i386_regs.eax)) {
1913 u_error = -i386_regs.eax;
1916 tcp->u_rval = i386_regs.eax;
1918 #elif defined(X86_64) || defined(X32)
1920 * In X32, return value is 64-bit (llseek uses one).
1921 * Using merely "long rax" would not work.
1925 if (x86_io.iov_len == sizeof(i386_regs)) {
1926 /* Sign extend from 32 bits */
1927 rax = (int32_t) i386_regs.eax;
1929 rax = x86_64_regs.rax;
1931 if (check_errno && is_negated_errno(rax)) {
1938 /* tcp->u_rval contains a truncated value */
1943 if (ia64_ia32mode) {
1944 int err = ia64_regs.gr[8];
1945 if (check_errno && is_negated_errno(err)) {
1953 if (check_errno && ia64_regs.gr[10]) {
1955 u_error = ia64_regs.gr[8];
1957 tcp->u_rval = ia64_regs.gr[8];
1961 if (check_errno && mips_REG_A3) {
1963 u_error = mips_REG_V0;
1965 # if defined LINUX_MIPSN32
1966 tcp->u_lrval = mips_REG_V0;
1968 tcp->u_rval = mips_REG_V0;
1970 #elif defined(POWERPC)
1971 if (check_errno && (ppc_regs.ccr & 0x10000000)) {
1973 u_error = ppc_regs.gpr[3];
1976 tcp->u_rval = ppc_regs.gpr[3];
1979 if (check_errno && is_negated_errno(m68k_d0)) {
1984 tcp->u_rval = m68k_d0;
1986 #elif defined(ARM) || defined(AARCH64)
1987 # if defined(AARCH64)
1988 if (tcp->currpers == 1) {
1989 if (check_errno && is_negated_errno(aarch64_regs.regs[0])) {
1991 u_error = -aarch64_regs.regs[0];
1994 tcp->u_rval = aarch64_regs.regs[0];
2000 if (check_errno && is_negated_errno(arm_regs.ARM_r0)) {
2002 u_error = -arm_regs.ARM_r0;
2005 tcp->u_rval = arm_regs.ARM_r0;
2008 #elif defined(AVR32)
2009 if (check_errno && avr32_regs.r12 && (unsigned) -avr32_regs.r12 < nerrnos) {
2011 u_error = -avr32_regs.r12;
2014 tcp->u_rval = avr32_regs.r12;
2017 if (check_errno && is_negated_errno(bfin_r0)) {
2021 tcp->u_rval = bfin_r0;
2023 #elif defined(ALPHA)
2024 if (check_errno && alpha_a3) {
2029 tcp->u_rval = alpha_r0;
2031 #elif defined(SPARC)
2032 if (check_errno && sparc_regs.psr & PSR_C) {
2034 u_error = sparc_regs.u_regs[U_REG_O0];
2037 tcp->u_rval = sparc_regs.u_regs[U_REG_O0];
2039 #elif defined(SPARC64)
2040 if (check_errno && sparc_regs.tstate & 0x1100000000UL) {
2042 u_error = sparc_regs.u_regs[U_REG_O0];
2045 tcp->u_rval = sparc_regs.u_regs[U_REG_O0];
2048 if (check_errno && is_negated_errno(hppa_r28)) {
2050 u_error = -hppa_r28;
2053 tcp->u_rval = hppa_r28;
2056 if (check_errno && is_negated_errno(sh_r0)) {
2061 tcp->u_rval = sh_r0;
2064 if (check_errno && is_negated_errno(sh64_r9)) {
2069 tcp->u_rval = sh64_r9;
2071 #elif defined(METAG)
2072 /* result pointer in D0Re0 (D0.0) */
2073 if (check_errno && is_negated_errno(metag_regs.dx[0][0])) {
2075 u_error = -metag_regs.dx[0][0];
2078 tcp->u_rval = metag_regs.dx[0][0];
2080 #elif defined(CRISV10) || defined(CRISV32)
2081 if (check_errno && cris_r10 && (unsigned) -cris_r10 < nerrnos) {
2083 u_error = -cris_r10;
2086 tcp->u_rval = cris_r10;
2090 * The standard tile calling convention returns the value (or negative
2091 * errno) in r0, and zero (or positive errno) in r1.
2092 * Until at least kernel 3.8, however, the r1 value is not reflected
2093 * in ptregs at this point, so we use r0 here.
2095 if (check_errno && is_negated_errno(tile_regs.regs[0])) {
2097 u_error = -tile_regs.regs[0];
2099 tcp->u_rval = tile_regs.regs[0];
2101 #elif defined(MICROBLAZE)
2102 if (check_errno && is_negated_errno(microblaze_r3)) {
2104 u_error = -microblaze_r3;
2107 tcp->u_rval = microblaze_r3;
2110 if (check_errno && is_negated_errno(or1k_regs.gpr[11])) {
2112 u_error = -or1k_regs.gpr[11];
2115 tcp->u_rval = or1k_regs.gpr[11];
2117 #elif defined(XTENSA)
2118 if (check_errno && is_negated_errno(xtensa_a2)) {
2120 u_error = -xtensa_a2;
2123 tcp->u_rval = xtensa_a2;
2126 if (check_errno && is_negated_errno(arc_regs.scratch.r0)) {
2128 u_error = -arc_regs.scratch.r0;
2131 tcp->u_rval = arc_regs.scratch.r0;
2134 tcp->u_error = u_error;
2138 dumpio(struct tcb *tcp)
2144 if ((unsigned long) tcp->u_arg[0] >= num_quals)
2146 func = tcp->s_ent->sys_func;
2147 if (func == printargs)
2149 if (qual_flags[tcp->u_arg[0]] & QUAL_READ) {
2150 if (func == sys_read ||
2151 func == sys_pread ||
2153 func == sys_recvfrom) {
2154 dumpstr(tcp, tcp->u_arg[1], tcp->u_rval);
2156 } else if (func == sys_readv) {
2157 dumpiov(tcp, tcp->u_arg[2], tcp->u_arg[1]);
2160 } else if (func == sys_recvmsg) {
2161 dumpiov_in_msghdr(tcp, tcp->u_arg[1]);
2163 } else if (func == sys_recvmmsg) {
2164 dumpiov_in_mmsghdr(tcp, tcp->u_arg[1]);
2169 if (qual_flags[tcp->u_arg[0]] & QUAL_WRITE) {
2170 if (func == sys_write ||
2171 func == sys_pwrite ||
2174 dumpstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
2175 else if (func == sys_writev)
2176 dumpiov(tcp, tcp->u_arg[2], tcp->u_arg[1]);
2178 else if (func == sys_sendmsg)
2179 dumpiov_in_msghdr(tcp, tcp->u_arg[1]);
2180 else if (func == sys_sendmmsg)
2181 dumpiov_in_mmsghdr(tcp, tcp->u_arg[1]);
2187 trace_syscall_exiting(struct tcb *tcp)
2194 /* Measure the exit time as early as possible to avoid errors. */
2196 gettimeofday(&tv, NULL);
2198 #ifdef USE_LIBUNWIND
2199 if (stack_trace_enabled) {
2200 if (tcp->s_ent->sys_flags & STACKTRACE_INVALIDATE_CACHE)
2201 unwind_cache_invalidate(tcp);
2205 #if SUPPORTED_PERSONALITIES > 1
2206 update_personality(tcp, tcp->currpers);
2208 res = (get_regs_error ? -1 : get_syscall_result(tcp));
2210 get_error(tcp); /* never fails */
2211 if (filtered(tcp) || hide_log_until_execve)
2216 count_syscall(tcp, &tv);
2217 if (cflag == CFLAG_ONLY_STATS) {
2222 /* If not in -ff mode, and printing_tcp != tcp,
2223 * then the log currently does not end with output
2224 * of _our syscall entry_, but with something else.
2225 * We need to say which syscall's return is this.
2227 * Forced reprinting via TCB_REPRINT is used only by
2228 * "strace -ff -oLOG test/threaded_execve" corner case.
2229 * It's the only case when -ff mode needs reprinting.
2231 if ((followfork < 2 && printing_tcp != tcp) || (tcp->flags & TCB_REPRINT)) {
2232 tcp->flags &= ~TCB_REPRINT;
2234 if (tcp->qual_flg & UNDEFINED_SCNO)
2235 tprintf("<... %s resumed> ", undefined_scno_name(tcp));
2237 tprintf("<... %s resumed> ", tcp->s_ent->sys_name);
2241 tcp->s_prev_ent = NULL;
2243 /* There was error in one of prior ptrace ops */
2246 tprints("= ? <unavailable>\n");
2248 tcp->flags &= ~TCB_INSYSCALL;
2251 tcp->s_prev_ent = tcp->s_ent;
2254 if (tcp->qual_flg & QUAL_RAW) {
2255 /* sys_res = printargs(tcp); - but it's nop on sysexit */
2257 /* FIXME: not_failing_only (IOW, option -z) is broken:
2258 * failure of syscall is known only after syscall return.
2259 * Thus we end up with something like this on, say, ENOENT:
2260 * open("doesnt_exist", O_RDONLY <unfinished ...>
2261 * {next syscall decode}
2262 * whereas the intended result is that open(...) line
2263 * is not shown at all.
2265 if (not_failing_only && tcp->u_error)
2266 goto ret; /* ignore failed syscalls */
2267 sys_res = tcp->s_ent->sys_func(tcp);
2272 u_error = tcp->u_error;
2273 if (tcp->qual_flg & QUAL_RAW) {
2275 tprintf("= -1 (errno %ld)", u_error);
2277 tprintf("= %#lx", tcp->u_rval);
2279 else if (!(sys_res & RVAL_NONE) && u_error) {
2281 /* Blocked signals do not interrupt any syscalls.
2282 * In this case syscalls don't return ERESTARTfoo codes.
2284 * Deadly signals set to SIG_DFL interrupt syscalls
2285 * and kill the process regardless of which of the codes below
2286 * is returned by the interrupted syscall.
2287 * In some cases, kernel forces a kernel-generated deadly
2288 * signal to be unblocked and set to SIG_DFL (and thus cause
2289 * death) if it is blocked or SIG_IGNed: for example, SIGSEGV
2290 * or SIGILL. (The alternative is to leave process spinning
2291 * forever on the faulty instruction - not useful).
2293 * SIG_IGNed signals and non-deadly signals set to SIG_DFL
2294 * (for example, SIGCHLD, SIGWINCH) interrupt syscalls,
2295 * but kernel will always restart them.
2298 /* Most common type of signal-interrupted syscall exit code.
2299 * The system call will be restarted with the same arguments
2300 * if SA_RESTART is set; otherwise, it will fail with EINTR.
2302 tprints("= ? ERESTARTSYS (To be restarted if SA_RESTART is set)");
2304 case ERESTARTNOINTR:
2305 /* Rare. For example, fork() returns this if interrupted.
2306 * SA_RESTART is ignored (assumed set): the restart is unconditional.
2308 tprints("= ? ERESTARTNOINTR (To be restarted)");
2310 case ERESTARTNOHAND:
2311 /* pause(), rt_sigsuspend() etc use this code.
2312 * SA_RESTART is ignored (assumed not set):
2313 * syscall won't restart (will return EINTR instead)
2314 * even after signal with SA_RESTART set. However,
2315 * after SIG_IGN or SIG_DFL signal it will restart
2316 * (thus the name "restart only if has no handler").
2318 tprints("= ? ERESTARTNOHAND (To be restarted if no handler)");
2320 case ERESTART_RESTARTBLOCK:
2321 /* Syscalls like nanosleep(), poll() which can't be
2322 * restarted with their original arguments use this
2323 * code. Kernel will execute restart_syscall() instead,
2324 * which changes arguments before restarting syscall.
2325 * SA_RESTART is ignored (assumed not set) similarly
2326 * to ERESTARTNOHAND. (Kernel can't honor SA_RESTART
2327 * since restart data is saved in "restart block"
2328 * in task struct, and if signal handler uses a syscall
2329 * which in turn saves another such restart block,
2330 * old data is lost and restart becomes impossible)
2332 tprints("= ? ERESTART_RESTARTBLOCK (Interrupted by signal)");
2335 if ((unsigned long) u_error < nerrnos
2336 && errnoent[u_error])
2337 tprintf("= -1 %s (%s)", errnoent[u_error],
2340 tprintf("= -1 ERRNO_%lu (%s)", u_error,
2344 if ((sys_res & RVAL_STR) && tcp->auxstr)
2345 tprintf(" (%s)", tcp->auxstr);
2348 if (sys_res & RVAL_NONE)
2351 switch (sys_res & RVAL_MASK) {
2353 #if SUPPORTED_PERSONALITIES > 1
2354 if (current_wordsize < sizeof(long))
2356 (unsigned int) tcp->u_rval);
2359 tprintf("= %#lx", tcp->u_rval);
2362 tprintf("= %#lo", tcp->u_rval);
2365 tprintf("= %lu", tcp->u_rval);
2368 tprintf("= %ld", tcp->u_rval);
2373 printfd(tcp, tcp->u_rval);
2376 tprintf("= %ld", tcp->u_rval);
2378 #if defined(LINUX_MIPSN32) || defined(X32)
2381 tprintf("= %#llx", tcp->u_lrval);
2384 tprintf("= %#llo", tcp->u_lrval);
2387 case RVAL_LUDECIMAL:
2388 tprintf("= %llu", tcp->u_lrval);
2392 tprintf("= %lld", tcp->u_lrval);
2398 "invalid rval format\n");
2402 if ((sys_res & RVAL_STR) && tcp->auxstr)
2403 tprintf(" (%s)", tcp->auxstr);
2406 tv_sub(&tv, &tv, &tcp->etime);
2407 tprintf(" <%ld.%06ld>",
2408 (long) tv.tv_sec, (long) tv.tv_usec);
2414 #ifdef USE_LIBUNWIND
2415 if (stack_trace_enabled)
2416 unwind_print_stacktrace(tcp);
2420 tcp->flags &= ~TCB_INSYSCALL;
2425 trace_syscall(struct tcb *tcp)
2427 return exiting(tcp) ?
2428 trace_syscall_exiting(tcp) : trace_syscall_entering(tcp);