| /* |
| * Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl> |
| * Copyright (c) 1993 Branko Lankester <branko@hacktic.nl> |
| * Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com> |
| * Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl> |
| * Copyright (c) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation |
| * Linux for s390 port by D.J. Barrow |
| * <barrow_dj@mail.yahoo.com,djbarrow@de.ibm.com> |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| * $Id$ |
| */ |
| |
| #include "defs.h" |
| |
| #include <signal.h> |
| #include <time.h> |
| #include <errno.h> |
| #include <sys/user.h> |
| #include <sys/syscall.h> |
| #include <sys/param.h> |
| |
| #ifdef HAVE_SYS_REG_H |
| #include <sys/reg.h> |
| #ifndef PTRACE_PEEKUSR |
| # define PTRACE_PEEKUSR PTRACE_PEEKUSER |
| #endif |
| #elif defined(HAVE_LINUX_PTRACE_H) |
| #undef PTRACE_SYSCALL |
| # ifdef HAVE_STRUCT_IA64_FPREG |
| # define ia64_fpreg XXX_ia64_fpreg |
| # endif |
| # ifdef HAVE_STRUCT_PT_ALL_USER_REGS |
| # define pt_all_user_regs XXX_pt_all_user_regs |
| # endif |
| #include <linux/ptrace.h> |
| # undef ia64_fpreg |
| # undef pt_all_user_regs |
| #endif |
| |
| #if defined (LINUX) && defined (SPARC64) |
| # undef PTRACE_GETREGS |
| # define PTRACE_GETREGS PTRACE_GETREGS64 |
| # undef PTRACE_SETREGS |
| # define PTRACE_SETREGS PTRACE_SETREGS64 |
| #endif /* LINUX && SPARC64 */ |
| |
| #if defined(LINUX) && defined(IA64) |
| # include <asm/ptrace_offsets.h> |
| # include <asm/rse.h> |
| #endif |
| |
| #define NR_SYSCALL_BASE 0 |
| #ifdef LINUX |
| #ifndef ERESTARTSYS |
| #define ERESTARTSYS 512 |
| #endif |
| #ifndef ERESTARTNOINTR |
| #define ERESTARTNOINTR 513 |
| #endif |
| #ifndef ERESTARTNOHAND |
| #define ERESTARTNOHAND 514 /* restart if no handler.. */ |
| #endif |
| #ifndef ENOIOCTLCMD |
| #define ENOIOCTLCMD 515 /* No ioctl command */ |
| #endif |
| #ifndef ERESTART_RESTARTBLOCK |
| #define ERESTART_RESTARTBLOCK 516 /* restart by calling sys_restart_syscall */ |
| #endif |
| #ifndef NSIG |
| #define NSIG 32 |
| #endif |
| #ifdef ARM |
| #undef NSIG |
| #define NSIG 32 |
| #undef NR_SYSCALL_BASE |
| #define NR_SYSCALL_BASE __NR_SYSCALL_BASE |
| #endif |
| #endif /* LINUX */ |
| |
| #include "syscall.h" |
| |
| /* Define these shorthand notations to simplify the syscallent files. */ |
| #define TD TRACE_DESC |
| #define TF TRACE_FILE |
| #define TI TRACE_IPC |
| #define TN TRACE_NETWORK |
| #define TP TRACE_PROCESS |
| #define TS TRACE_SIGNAL |
| #define NF SYSCALL_NEVER_FAILS |
| |
| static const struct sysent sysent0[] = { |
| #include "syscallent.h" |
| }; |
| static const int nsyscalls0 = sizeof sysent0 / sizeof sysent0[0]; |
| int qual_flags0[MAX_QUALS]; |
| |
| #if SUPPORTED_PERSONALITIES >= 2 |
| static const struct sysent sysent1[] = { |
| #include "syscallent1.h" |
| }; |
| static const int nsyscalls1 = sizeof sysent1 / sizeof sysent1[0]; |
| int qual_flags1[MAX_QUALS]; |
| #endif /* SUPPORTED_PERSONALITIES >= 2 */ |
| |
| #if SUPPORTED_PERSONALITIES >= 3 |
| static const struct sysent sysent2[] = { |
| #include "syscallent2.h" |
| }; |
| static const int nsyscalls2 = sizeof sysent2 / sizeof sysent2[0]; |
| int qual_flags2[MAX_QUALS]; |
| #endif /* SUPPORTED_PERSONALITIES >= 3 */ |
| |
| const struct sysent *sysent; |
| int *qual_flags; |
| int nsyscalls; |
| |
| /* Now undef them since short defines cause wicked namespace pollution. */ |
| #undef TD |
| #undef TF |
| #undef TI |
| #undef TN |
| #undef TP |
| #undef TS |
| #undef NF |
| |
| static const char *const errnoent0[] = { |
| #include "errnoent.h" |
| }; |
| static const int nerrnos0 = sizeof errnoent0 / sizeof errnoent0[0]; |
| |
| #if SUPPORTED_PERSONALITIES >= 2 |
| static const char *const errnoent1[] = { |
| #include "errnoent1.h" |
| }; |
| static const int nerrnos1 = sizeof errnoent1 / sizeof errnoent1[0]; |
| #endif /* SUPPORTED_PERSONALITIES >= 2 */ |
| |
| #if SUPPORTED_PERSONALITIES >= 3 |
| static const char *const errnoent2[] = { |
| #include "errnoent2.h" |
| }; |
| static const int nerrnos2 = sizeof errnoent2 / sizeof errnoent2[0]; |
| #endif /* SUPPORTED_PERSONALITIES >= 3 */ |
| |
| const char *const *errnoent; |
| int nerrnos; |
| |
| int current_personality; |
| |
| #ifndef PERSONALITY0_WORDSIZE |
| # define PERSONALITY0_WORDSIZE sizeof(long) |
| #endif |
| const int personality_wordsize[SUPPORTED_PERSONALITIES] = { |
| PERSONALITY0_WORDSIZE, |
| #if SUPPORTED_PERSONALITIES > 1 |
| PERSONALITY1_WORDSIZE, |
| #endif |
| #if SUPPORTED_PERSONALITIES > 2 |
| PERSONALITY2_WORDSIZE, |
| #endif |
| };; |
| |
| int |
| set_personality(int personality) |
| { |
| switch (personality) { |
| case 0: |
| errnoent = errnoent0; |
| nerrnos = nerrnos0; |
| sysent = sysent0; |
| nsyscalls = nsyscalls0; |
| ioctlent = ioctlent0; |
| nioctlents = nioctlents0; |
| signalent = signalent0; |
| nsignals = nsignals0; |
| qual_flags = qual_flags0; |
| break; |
| |
| #if SUPPORTED_PERSONALITIES >= 2 |
| case 1: |
| errnoent = errnoent1; |
| nerrnos = nerrnos1; |
| sysent = sysent1; |
| nsyscalls = nsyscalls1; |
| ioctlent = ioctlent1; |
| nioctlents = nioctlents1; |
| signalent = signalent1; |
| nsignals = nsignals1; |
| qual_flags = qual_flags1; |
| break; |
| #endif /* SUPPORTED_PERSONALITIES >= 2 */ |
| |
| #if SUPPORTED_PERSONALITIES >= 3 |
| case 2: |
| errnoent = errnoent2; |
| nerrnos = nerrnos2; |
| sysent = sysent2; |
| nsyscalls = nsyscalls2; |
| ioctlent = ioctlent2; |
| nioctlents = nioctlents2; |
| signalent = signalent2; |
| nsignals = nsignals2; |
| qual_flags = qual_flags2; |
| break; |
| #endif /* SUPPORTED_PERSONALITIES >= 3 */ |
| |
| default: |
| return -1; |
| } |
| |
| current_personality = personality; |
| return 0; |
| } |
| |
| |
| static int qual_syscall(), qual_signal(), qual_fault(), qual_desc(); |
| |
| static const struct qual_options { |
| int bitflag; |
| const char *option_name; |
| int (*qualify)(const char *, int, int); |
| const char *argument_name; |
| } qual_options[] = { |
| { QUAL_TRACE, "trace", qual_syscall, "system call" }, |
| { QUAL_TRACE, "t", qual_syscall, "system call" }, |
| { QUAL_ABBREV, "abbrev", qual_syscall, "system call" }, |
| { QUAL_ABBREV, "a", qual_syscall, "system call" }, |
| { QUAL_VERBOSE, "verbose", qual_syscall, "system call" }, |
| { QUAL_VERBOSE, "v", qual_syscall, "system call" }, |
| { QUAL_RAW, "raw", qual_syscall, "system call" }, |
| { QUAL_RAW, "x", qual_syscall, "system call" }, |
| { QUAL_SIGNAL, "signal", qual_signal, "signal" }, |
| { QUAL_SIGNAL, "signals", qual_signal, "signal" }, |
| { QUAL_SIGNAL, "s", qual_signal, "signal" }, |
| { QUAL_FAULT, "fault", qual_fault, "fault" }, |
| { QUAL_FAULT, "faults", qual_fault, "fault" }, |
| { QUAL_FAULT, "m", qual_fault, "fault" }, |
| { QUAL_READ, "read", qual_desc, "descriptor" }, |
| { QUAL_READ, "reads", qual_desc, "descriptor" }, |
| { QUAL_READ, "r", qual_desc, "descriptor" }, |
| { QUAL_WRITE, "write", qual_desc, "descriptor" }, |
| { QUAL_WRITE, "writes", qual_desc, "descriptor" }, |
| { QUAL_WRITE, "w", qual_desc, "descriptor" }, |
| { 0, NULL, NULL, NULL }, |
| }; |
| |
| static void |
| qualify_one(int n, int bitflag, int not, int pers) |
| { |
| if (pers == 0 || pers < 0) { |
| if (not) |
| qual_flags0[n] &= ~bitflag; |
| else |
| qual_flags0[n] |= bitflag; |
| } |
| |
| #if SUPPORTED_PERSONALITIES >= 2 |
| if (pers == 1 || pers < 0) { |
| if (not) |
| qual_flags1[n] &= ~bitflag; |
| else |
| qual_flags1[n] |= bitflag; |
| } |
| #endif /* SUPPORTED_PERSONALITIES >= 2 */ |
| |
| #if SUPPORTED_PERSONALITIES >= 3 |
| if (pers == 2 || pers < 0) { |
| if (not) |
| qual_flags2[n] &= ~bitflag; |
| else |
| qual_flags2[n] |= bitflag; |
| } |
| #endif /* SUPPORTED_PERSONALITIES >= 3 */ |
| } |
| |
| static int |
| qual_syscall(const char *s, int bitflag, int not) |
| { |
| int i; |
| int rc = -1; |
| |
| if (isdigit((unsigned char)*s)) { |
| int i = atoi(s); |
| if (i < 0 || i >= MAX_QUALS) |
| return -1; |
| qualify_one(i, bitflag, not, -1); |
| return 0; |
| } |
| for (i = 0; i < nsyscalls0; i++) |
| if (strcmp(s, sysent0[i].sys_name) == 0) { |
| qualify_one(i, bitflag, not, 0); |
| rc = 0; |
| } |
| |
| #if SUPPORTED_PERSONALITIES >= 2 |
| for (i = 0; i < nsyscalls1; i++) |
| if (strcmp(s, sysent1[i].sys_name) == 0) { |
| qualify_one(i, bitflag, not, 1); |
| rc = 0; |
| } |
| #endif /* SUPPORTED_PERSONALITIES >= 2 */ |
| |
| #if SUPPORTED_PERSONALITIES >= 3 |
| for (i = 0; i < nsyscalls2; i++) |
| if (strcmp(s, sysent2[i].sys_name) == 0) { |
| qualify_one(i, bitflag, not, 2); |
| rc = 0; |
| } |
| #endif /* SUPPORTED_PERSONALITIES >= 3 */ |
| |
| return rc; |
| } |
| |
| static int |
| qual_signal(const char *s, int bitflag, int not) |
| { |
| int i; |
| char buf[32]; |
| |
| if (isdigit((unsigned char)*s)) { |
| int signo = atoi(s); |
| if (signo < 0 || signo >= MAX_QUALS) |
| return -1; |
| qualify_one(signo, bitflag, not, -1); |
| return 0; |
| } |
| if (strlen(s) >= sizeof buf) |
| return -1; |
| strcpy(buf, s); |
| s = buf; |
| if (strncasecmp(s, "SIG", 3) == 0) |
| s += 3; |
| for (i = 0; i <= NSIG; i++) |
| if (strcasecmp(s, signame(i) + 3) == 0) { |
| qualify_one(i, bitflag, not, -1); |
| return 0; |
| } |
| return -1; |
| } |
| |
| static int |
| qual_fault(const char *s, int bitflag, int not) |
| { |
| return -1; |
| } |
| |
| static int |
| qual_desc(const char *s, int bitflag, int not) |
| { |
| if (isdigit((unsigned char)*s)) { |
| int desc = atoi(s); |
| if (desc < 0 || desc >= MAX_QUALS) |
| return -1; |
| qualify_one(desc, bitflag, not, -1); |
| return 0; |
| } |
| return -1; |
| } |
| |
| static int |
| lookup_class(const char *s) |
| { |
| if (strcmp(s, "file") == 0) |
| return TRACE_FILE; |
| if (strcmp(s, "ipc") == 0) |
| return TRACE_IPC; |
| if (strcmp(s, "network") == 0) |
| return TRACE_NETWORK; |
| if (strcmp(s, "process") == 0) |
| return TRACE_PROCESS; |
| if (strcmp(s, "signal") == 0) |
| return TRACE_SIGNAL; |
| if (strcmp(s, "desc") == 0) |
| return TRACE_DESC; |
| return -1; |
| } |
| |
| void |
| qualify(const char *s) |
| { |
| const struct qual_options *opt; |
| int not; |
| char *copy; |
| const char *p; |
| int i, n; |
| |
| opt = &qual_options[0]; |
| for (i = 0; (p = qual_options[i].option_name); i++) { |
| n = strlen(p); |
| if (strncmp(s, p, n) == 0 && s[n] == '=') { |
| opt = &qual_options[i]; |
| s += n + 1; |
| break; |
| } |
| } |
| not = 0; |
| if (*s == '!') { |
| not = 1; |
| s++; |
| } |
| if (strcmp(s, "none") == 0) { |
| not = 1 - not; |
| s = "all"; |
| } |
| if (strcmp(s, "all") == 0) { |
| for (i = 0; i < MAX_QUALS; i++) { |
| qualify_one(i, opt->bitflag, not, -1); |
| } |
| return; |
| } |
| for (i = 0; i < MAX_QUALS; i++) { |
| qualify_one(i, opt->bitflag, !not, -1); |
| } |
| if (!(copy = strdup(s))) { |
| fprintf(stderr, "out of memory\n"); |
| exit(1); |
| } |
| for (p = strtok(copy, ","); p; p = strtok(NULL, ",")) { |
| if (opt->bitflag == QUAL_TRACE && (n = lookup_class(p)) > 0) { |
| for (i = 0; i < nsyscalls0; i++) |
| if (sysent0[i].sys_flags & n) |
| qualify_one(i, opt->bitflag, not, 0); |
| |
| #if SUPPORTED_PERSONALITIES >= 2 |
| for (i = 0; i < nsyscalls1; i++) |
| if (sysent1[i].sys_flags & n) |
| qualify_one(i, opt->bitflag, not, 1); |
| #endif /* SUPPORTED_PERSONALITIES >= 2 */ |
| |
| #if SUPPORTED_PERSONALITIES >= 3 |
| for (i = 0; i < nsyscalls2; i++) |
| if (sysent2[i].sys_flags & n) |
| qualify_one(i, opt->bitflag, not, 2); |
| #endif /* SUPPORTED_PERSONALITIES >= 3 */ |
| |
| continue; |
| } |
| if (opt->qualify(p, opt->bitflag, not)) { |
| fprintf(stderr, "strace: invalid %s `%s'\n", |
| opt->argument_name, p); |
| exit(1); |
| } |
| } |
| free(copy); |
| return; |
| } |
| |
| static void |
| dumpio(struct tcb *tcp) |
| { |
| if (syserror(tcp)) |
| return; |
| if (tcp->u_arg[0] < 0 || tcp->u_arg[0] >= MAX_QUALS) |
| return; |
| if (tcp->scno < 0 || tcp->scno >= nsyscalls) |
| return; |
| if (sysent[tcp->scno].sys_func == printargs) |
| return; |
| if (qual_flags[tcp->u_arg[0]] & QUAL_READ) { |
| if (sysent[tcp->scno].sys_func == sys_read || |
| sysent[tcp->scno].sys_func == sys_pread || |
| sysent[tcp->scno].sys_func == sys_pread64 || |
| sysent[tcp->scno].sys_func == sys_recv || |
| sysent[tcp->scno].sys_func == sys_recvfrom) |
| dumpstr(tcp, tcp->u_arg[1], tcp->u_rval); |
| else if (sysent[tcp->scno].sys_func == sys_readv) |
| dumpiov(tcp, tcp->u_arg[2], tcp->u_arg[1]); |
| return; |
| } |
| if (qual_flags[tcp->u_arg[0]] & QUAL_WRITE) { |
| if (sysent[tcp->scno].sys_func == sys_write || |
| sysent[tcp->scno].sys_func == sys_pwrite || |
| sysent[tcp->scno].sys_func == sys_pwrite64 || |
| sysent[tcp->scno].sys_func == sys_send || |
| sysent[tcp->scno].sys_func == sys_sendto) |
| dumpstr(tcp, tcp->u_arg[1], tcp->u_arg[2]); |
| else if (sysent[tcp->scno].sys_func == sys_writev) |
| dumpiov(tcp, tcp->u_arg[2], tcp->u_arg[1]); |
| return; |
| } |
| } |
| |
| #ifndef FREEBSD |
| enum subcall_style { shift_style, deref_style, mask_style, door_style }; |
| #else /* FREEBSD */ |
| enum subcall_style { shift_style, deref_style, mask_style, door_style, table_style }; |
| |
| struct subcall { |
| int call; |
| int nsubcalls; |
| int subcalls[5]; |
| }; |
| |
| static const struct subcall subcalls_table[] = { |
| { SYS_shmsys, 5, { SYS_shmat, SYS_shmctl, SYS_shmdt, SYS_shmget, SYS_shmctl } }, |
| #ifdef SYS_semconfig |
| { SYS_semsys, 4, { SYS___semctl, SYS_semget, SYS_semop, SYS_semconfig } }, |
| #else |
| { SYS_semsys, 3, { SYS___semctl, SYS_semget, SYS_semop } }, |
| #endif |
| { SYS_msgsys, 4, { SYS_msgctl, SYS_msgget, SYS_msgsnd, SYS_msgrcv } }, |
| }; |
| #endif /* FREEBSD */ |
| |
| #if !(defined(LINUX) && ( defined(ALPHA) || defined(MIPS) || defined(__ARM_EABI__) )) |
| |
| static void |
| decode_subcall(tcp, subcall, nsubcalls, style) |
| struct tcb *tcp; |
| int subcall; |
| int nsubcalls; |
| enum subcall_style style; |
| { |
| unsigned long addr, mask; |
| int i; |
| int size = personality_wordsize[current_personality]; |
| |
| switch (style) { |
| case shift_style: |
| if (tcp->u_arg[0] < 0 || tcp->u_arg[0] >= nsubcalls) |
| return; |
| tcp->scno = subcall + tcp->u_arg[0]; |
| if (sysent[tcp->scno].nargs != -1) |
| tcp->u_nargs = sysent[tcp->scno].nargs; |
| else |
| tcp->u_nargs--; |
| for (i = 0; i < tcp->u_nargs; i++) |
| tcp->u_arg[i] = tcp->u_arg[i + 1]; |
| break; |
| case deref_style: |
| if (tcp->u_arg[0] < 0 || tcp->u_arg[0] >= nsubcalls) |
| return; |
| tcp->scno = subcall + tcp->u_arg[0]; |
| addr = tcp->u_arg[1]; |
| for (i = 0; i < sysent[tcp->scno].nargs; i++) { |
| if (size == sizeof(int)) { |
| unsigned int arg; |
| if (umove(tcp, addr, &arg) < 0) |
| arg = 0; |
| tcp->u_arg[i] = arg; |
| } |
| else if (size == sizeof(long)) { |
| unsigned long arg; |
| if (umove(tcp, addr, &arg) < 0) |
| arg = 0; |
| tcp->u_arg[i] = arg; |
| } |
| else |
| abort(); |
| addr += size; |
| } |
| tcp->u_nargs = sysent[tcp->scno].nargs; |
| break; |
| case mask_style: |
| mask = (tcp->u_arg[0] >> 8) & 0xff; |
| for (i = 0; mask; i++) |
| mask >>= 1; |
| if (i >= nsubcalls) |
| return; |
| tcp->u_arg[0] &= 0xff; |
| tcp->scno = subcall + i; |
| if (sysent[tcp->scno].nargs != -1) |
| tcp->u_nargs = sysent[tcp->scno].nargs; |
| break; |
| case door_style: |
| /* |
| * Oh, yuck. The call code is the *sixth* argument. |
| * (don't you mean the *last* argument? - JH) |
| */ |
| if (tcp->u_arg[5] < 0 || tcp->u_arg[5] >= nsubcalls) |
| return; |
| tcp->scno = subcall + tcp->u_arg[5]; |
| if (sysent[tcp->scno].nargs != -1) |
| tcp->u_nargs = sysent[tcp->scno].nargs; |
| else |
| tcp->u_nargs--; |
| break; |
| #ifdef FREEBSD |
| case table_style: |
| for (i = 0; i < sizeof(subcalls_table) / sizeof(struct subcall); i++) |
| if (subcalls_table[i].call == tcp->scno) break; |
| if (i < sizeof(subcalls_table) / sizeof(struct subcall) && |
| tcp->u_arg[0] >= 0 && tcp->u_arg[0] < subcalls_table[i].nsubcalls) { |
| tcp->scno = subcalls_table[i].subcalls[tcp->u_arg[0]]; |
| for (i = 0; i < tcp->u_nargs; i++) |
| tcp->u_arg[i] = tcp->u_arg[i + 1]; |
| } |
| break; |
| #endif /* FREEBSD */ |
| } |
| } |
| #endif |
| |
| struct tcb *tcp_last = NULL; |
| |
| static int |
| internal_syscall(struct tcb *tcp) |
| { |
| /* |
| * We must always trace a few critical system calls in order to |
| * correctly support following forks in the presence of tracing |
| * qualifiers. |
| */ |
| int (*func)(); |
| |
| if (tcp->scno < 0 || tcp->scno >= nsyscalls) |
| return 0; |
| |
| func = sysent[tcp->scno].sys_func; |
| |
| if (sys_exit == func) |
| return internal_exit(tcp); |
| |
| if ( sys_fork == func |
| #if defined(FREEBSD) || defined(LINUX) || defined(SUNOS4) |
| || sys_vfork == func |
| #endif |
| #ifdef LINUX |
| || sys_clone == func |
| #endif |
| #if UNIXWARE > 2 |
| || sys_rfork == func |
| #endif |
| ) |
| return internal_fork(tcp); |
| |
| if ( sys_execve == func |
| #if defined(SPARC) || defined(SPARC64) || defined(SUNOS4) |
| || sys_execv == func |
| #endif |
| #if UNIXWARE > 2 |
| || sys_rexecve == func |
| #endif |
| ) |
| return internal_exec(tcp); |
| |
| if ( sys_waitpid == func |
| || sys_wait4 == func |
| #if defined(SVR4) || defined(FREEBSD) || defined(SUNOS4) |
| || sys_wait == func |
| #endif |
| #ifdef ALPHA |
| || sys_osf_wait4 == func |
| #endif |
| ) |
| return internal_wait(tcp, 2); |
| |
| #if defined(LINUX) || defined(SVR4) |
| if (sys_waitid == func) |
| return internal_wait(tcp, 3); |
| #endif |
| |
| return 0; |
| } |
| |
| |
| #ifdef LINUX |
| #if defined (I386) |
| static long eax; |
| #elif defined (IA64) |
| long r8, r10, psr; |
| long ia32 = 0; |
| #elif defined (POWERPC) |
| static long result,flags; |
| #elif defined (M68K) |
| static long d0; |
| #elif defined(BFIN) |
| static long r0; |
| #elif defined (ARM) |
| static struct pt_regs regs; |
| #elif defined (ALPHA) |
| static long r0; |
| static long a3; |
| #elif defined(AVR32) |
| static struct pt_regs regs; |
| #elif defined (SPARC) || defined (SPARC64) |
| static struct pt_regs regs; |
| static unsigned long trap; |
| #elif defined(LINUX_MIPSN32) |
| static long long a3; |
| static long long r2; |
| #elif defined(MIPS) |
| static long a3; |
| static long r2; |
| #elif defined(S390) || defined(S390X) |
| static long gpr2; |
| static long pc; |
| static long syscall_mode; |
| #elif defined(HPPA) |
| static long r28; |
| #elif defined(SH) |
| static long r0; |
| #elif defined(SH64) |
| static long r9; |
| #elif defined(X86_64) |
| static long rax; |
| #elif defined(CRISV10) || defined(CRISV32) |
| static long r10; |
| #elif defined(MICROBLAZE) |
| static long r3; |
| #endif |
| #endif /* LINUX */ |
| #ifdef FREEBSD |
| struct reg regs; |
| #endif /* FREEBSD */ |
| |
| int |
| get_scno(struct tcb *tcp) |
| { |
| long scno = 0; |
| |
| #ifdef LINUX |
| # if defined(S390) || defined(S390X) |
| if (tcp->flags & TCB_WAITEXECVE) { |
| /* |
| * When the execve system call completes successfully, the |
| * new process still has -ENOSYS (old style) or __NR_execve |
| * (new style) in gpr2. We cannot recover the scno again |
| * by disassembly, because the image that executed the |
| * syscall is gone now. Fortunately, we don't want it. We |
| * leave the flag set so that syscall_fixup can fake the |
| * result. |
| */ |
| if (tcp->flags & TCB_INSYSCALL) |
| return 1; |
| /* |
| * This is the SIGTRAP after execve. We cannot try to read |
| * the system call here either. |
| */ |
| tcp->flags &= ~TCB_WAITEXECVE; |
| return 0; |
| } |
| |
| if (upeek(tcp, PT_GPR2, &syscall_mode) < 0) |
| return -1; |
| |
| if (syscall_mode != -ENOSYS) { |
| /* |
| * Since kernel version 2.5.44 the scno gets passed in gpr2. |
| */ |
| scno = syscall_mode; |
| } else { |
| /* |
| * Old style of "passing" the scno via the SVC instruction. |
| */ |
| |
| long opcode, offset_reg, tmp; |
| void * svc_addr; |
| int gpr_offset[16] = {PT_GPR0, PT_GPR1, PT_ORIGGPR2, PT_GPR3, |
| PT_GPR4, PT_GPR5, PT_GPR6, PT_GPR7, |
| PT_GPR8, PT_GPR9, PT_GPR10, PT_GPR11, |
| PT_GPR12, PT_GPR13, PT_GPR14, PT_GPR15}; |
| |
| if (upeek(tcp, PT_PSWADDR, &pc) < 0) |
| return -1; |
| errno = 0; |
| opcode = ptrace(PTRACE_PEEKTEXT, tcp->pid, (char *)(pc-sizeof(long)), 0); |
| if (errno) { |
| perror("peektext(pc-oneword)"); |
| return -1; |
| } |
| |
| /* |
| * We have to check if the SVC got executed directly or via an |
| * EXECUTE instruction. In case of EXECUTE it is necessary to do |
| * instruction decoding to derive the system call number. |
| * Unfortunately the opcode sizes of EXECUTE and SVC are differently, |
| * so that this doesn't work if a SVC opcode is part of an EXECUTE |
| * opcode. Since there is no way to find out the opcode size this |
| * is the best we can do... |
| */ |
| |
| if ((opcode & 0xff00) == 0x0a00) { |
| /* SVC opcode */ |
| scno = opcode & 0xff; |
| } |
| else { |
| /* SVC got executed by EXECUTE instruction */ |
| |
| /* |
| * Do instruction decoding of EXECUTE. If you really want to |
| * understand this, read the Principles of Operations. |
| */ |
| svc_addr = (void *) (opcode & 0xfff); |
| |
| tmp = 0; |
| offset_reg = (opcode & 0x000f0000) >> 16; |
| if (offset_reg && (upeek(tcp, gpr_offset[offset_reg], &tmp) < 0)) |
| return -1; |
| svc_addr += tmp; |
| |
| tmp = 0; |
| offset_reg = (opcode & 0x0000f000) >> 12; |
| if (offset_reg && (upeek(tcp, gpr_offset[offset_reg], &tmp) < 0)) |
| return -1; |
| svc_addr += tmp; |
| |
| scno = ptrace(PTRACE_PEEKTEXT, tcp->pid, svc_addr, 0); |
| if (errno) |
| return -1; |
| # if defined(S390X) |
| scno >>= 48; |
| # else |
| scno >>= 16; |
| # endif |
| tmp = 0; |
| offset_reg = (opcode & 0x00f00000) >> 20; |
| if (offset_reg && (upeek(tcp, gpr_offset[offset_reg], &tmp) < 0)) |
| return -1; |
| |
| scno = (scno | tmp) & 0xff; |
| } |
| } |
| # elif defined (POWERPC) |
| if (upeek(tcp, sizeof(unsigned long)*PT_R0, &scno) < 0) |
| return -1; |
| if (!(tcp->flags & TCB_INSYSCALL)) { |
| /* Check if we return from execve. */ |
| if (scno == 0 && (tcp->flags & TCB_WAITEXECVE)) { |
| tcp->flags &= ~TCB_WAITEXECVE; |
| return 0; |
| } |
| } |
| |
| # ifdef POWERPC64 |
| if (!(tcp->flags & TCB_INSYSCALL)) { |
| static int currpers = -1; |
| long val; |
| int pid = tcp->pid; |
| |
| /* Check for 64/32 bit mode. */ |
| if (upeek(tcp, sizeof (unsigned long)*PT_MSR, &val) < 0) |
| return -1; |
| /* SF is bit 0 of MSR */ |
| if (val < 0) |
| currpers = 0; |
| else |
| currpers = 1; |
| if (currpers != current_personality) { |
| static const char *const names[] = {"64 bit", "32 bit"}; |
| set_personality(currpers); |
| fprintf(stderr, "[ Process PID=%d runs in %s mode. ]\n", |
| pid, names[current_personality]); |
| } |
| } |
| # endif |
| # elif defined(AVR32) |
| /* |
| * Read complete register set in one go. |
| */ |
| if (ptrace(PTRACE_GETREGS, tcp->pid, NULL, ®s) < 0) |
| return -1; |
| |
| /* |
| * We only need to grab the syscall number on syscall entry. |
| */ |
| if (!(tcp->flags & TCB_INSYSCALL)) { |
| scno = regs.r8; |
| |
| /* Check if we return from execve. */ |
| if (tcp->flags & TCB_WAITEXECVE) { |
| tcp->flags &= ~TCB_WAITEXECVE; |
| return 0; |
| } |
| } |
| # elif defined(BFIN) |
| if (upeek(tcp, PT_ORIG_P0, &scno)) |
| return -1; |
| # elif defined (I386) |
| if (upeek(tcp, 4*ORIG_EAX, &scno) < 0) |
| return -1; |
| # elif defined (X86_64) |
| if (upeek(tcp, 8*ORIG_RAX, &scno) < 0) |
| return -1; |
| |
| if (!(tcp->flags & TCB_INSYSCALL)) { |
| static int currpers = -1; |
| long val; |
| int pid = tcp->pid; |
| |
| /* Check CS register value. On x86-64 linux it is: |
| * 0x33 for long mode (64 bit) |
| * 0x23 for compatibility mode (32 bit) |
| * It takes only one ptrace and thus doesn't need |
| * to be cached. |
| */ |
| if (upeek(tcp, 8*CS, &val) < 0) |
| return -1; |
| switch (val) { |
| case 0x23: currpers = 1; break; |
| case 0x33: currpers = 0; break; |
| default: |
| fprintf(stderr, "Unknown value CS=0x%02X while " |
| "detecting personality of process " |
| "PID=%d\n", (int)val, pid); |
| currpers = current_personality; |
| break; |
| } |
| # if 0 |
| /* This version analyzes the opcode of a syscall instruction. |
| * (int 0x80 on i386 vs. syscall on x86-64) |
| * It works, but is too complicated. |
| */ |
| unsigned long val, rip, i; |
| |
| if (upeek(tcp, 8*RIP, &rip) < 0) |
| perror("upeek(RIP)"); |
| |
| /* sizeof(syscall) == sizeof(int 0x80) == 2 */ |
| rip -= 2; |
| errno = 0; |
| |
| call = ptrace(PTRACE_PEEKTEXT, pid, (char *)rip, (char *)0); |
| if (errno) |
| fprintf(stderr, "ptrace_peektext failed: %s\n", |
| strerror(errno)); |
| switch (call & 0xffff) { |
| /* x86-64: syscall = 0x0f 0x05 */ |
| case 0x050f: currpers = 0; break; |
| /* i386: int 0x80 = 0xcd 0x80 */ |
| case 0x80cd: currpers = 1; break; |
| default: |
| currpers = current_personality; |
| fprintf(stderr, |
| "Unknown syscall opcode (0x%04X) while " |
| "detecting personality of process " |
| "PID=%d\n", (int)call, pid); |
| break; |
| } |
| # endif |
| if (currpers != current_personality) { |
| static const char *const names[] = {"64 bit", "32 bit"}; |
| set_personality(currpers); |
| fprintf(stderr, "[ Process PID=%d runs in %s mode. ]\n", |
| pid, names[current_personality]); |
| } |
| } |
| # elif defined(IA64) |
| # define IA64_PSR_IS ((long)1 << 34) |
| if (upeek (tcp, PT_CR_IPSR, &psr) >= 0) |
| ia32 = (psr & IA64_PSR_IS) != 0; |
| if (!(tcp->flags & TCB_INSYSCALL)) { |
| if (ia32) { |
| if (upeek(tcp, PT_R1, &scno) < 0) /* orig eax */ |
| return -1; |
| } else { |
| if (upeek (tcp, PT_R15, &scno) < 0) |
| return -1; |
| } |
| /* Check if we return from execve. */ |
| if (tcp->flags & TCB_WAITEXECVE) { |
| tcp->flags &= ~TCB_WAITEXECVE; |
| return 0; |
| } |
| } else { |
| /* syscall in progress */ |
| if (upeek (tcp, PT_R8, &r8) < 0) |
| return -1; |
| if (upeek (tcp, PT_R10, &r10) < 0) |
| return -1; |
| } |
| # elif defined (ARM) |
| /* |
| * Read complete register set in one go. |
| */ |
| if (ptrace(PTRACE_GETREGS, tcp->pid, NULL, (void *)®s) == -1) |
| return -1; |
| |
| /* |
| * We only need to grab the syscall number on syscall entry. |
| */ |
| if (regs.ARM_ip == 0) { |
| if (!(tcp->flags & TCB_INSYSCALL)) { |
| /* Check if we return from execve. */ |
| if (tcp->flags & TCB_WAITEXECVE) { |
| tcp->flags &= ~TCB_WAITEXECVE; |
| return 0; |
| } |
| } |
| |
| /* |
| * Note: we only deal with only 32-bit CPUs here. |
| */ |
| if (regs.ARM_cpsr & 0x20) { |
| /* |
| * Get the Thumb-mode system call number |
| */ |
| scno = regs.ARM_r7; |
| } else { |
| /* |
| * Get the ARM-mode system call number |
| */ |
| errno = 0; |
| scno = ptrace(PTRACE_PEEKTEXT, tcp->pid, (void *)(regs.ARM_pc - 4), NULL); |
| if (errno) |
| return -1; |
| |
| if (scno == 0 && (tcp->flags & TCB_WAITEXECVE)) { |
| tcp->flags &= ~TCB_WAITEXECVE; |
| return 0; |
| } |
| |
| /* Handle the EABI syscall convention. We do not |
| bother converting structures between the two |
| ABIs, but basic functionality should work even |
| if strace and the traced program have different |
| ABIs. */ |
| if (scno == 0xef000000) { |
| scno = regs.ARM_r7; |
| } else { |
| if ((scno & 0x0ff00000) != 0x0f900000) { |
| fprintf(stderr, "syscall: unknown syscall trap 0x%08lx\n", |
| scno); |
| return -1; |
| } |
| |
| /* |
| * Fixup the syscall number |
| */ |
| scno &= 0x000fffff; |
| } |
| } |
| if (scno & 0x0f0000) { |
| /* |
| * Handle ARM specific syscall |
| */ |
| set_personality(1); |
| scno &= 0x0000ffff; |
| } else |
| set_personality(0); |
| |
| if (tcp->flags & TCB_INSYSCALL) { |
| fprintf(stderr, "pid %d stray syscall entry\n", tcp->pid); |
| tcp->flags &= ~TCB_INSYSCALL; |
| } |
| } else { |
| if (!(tcp->flags & TCB_INSYSCALL)) { |
| fprintf(stderr, "pid %d stray syscall exit\n", tcp->pid); |
| tcp->flags |= TCB_INSYSCALL; |
| } |
| } |
| # elif defined (M68K) |
| if (upeek(tcp, 4*PT_ORIG_D0, &scno) < 0) |
| return -1; |
| # elif defined (LINUX_MIPSN32) |
| unsigned long long regs[38]; |
| |
| if (ptrace (PTRACE_GETREGS, tcp->pid, NULL, (long) ®s) < 0) |
| return -1; |
| a3 = regs[REG_A3]; |
| r2 = regs[REG_V0]; |
| |
| if(!(tcp->flags & TCB_INSYSCALL)) { |
| scno = r2; |
| |
| /* Check if we return from execve. */ |
| if (scno == 0 && tcp->flags & TCB_WAITEXECVE) { |
| tcp->flags &= ~TCB_WAITEXECVE; |
| return 0; |
| } |
| |
| if (scno < 0 || scno > nsyscalls) { |
| if(a3 == 0 || a3 == -1) { |
| if(debug) |
| fprintf (stderr, "stray syscall exit: v0 = %ld\n", scno); |
| return 0; |
| } |
| } |
| } |
| # elif defined (MIPS) |
| if (upeek(tcp, REG_A3, &a3) < 0) |
| return -1; |
| if(!(tcp->flags & TCB_INSYSCALL)) { |
| if (upeek(tcp, REG_V0, &scno) < 0) |
| return -1; |
| |
| /* Check if we return from execve. */ |
| if (scno == 0 && tcp->flags & TCB_WAITEXECVE) { |
| tcp->flags &= ~TCB_WAITEXECVE; |
| return 0; |
| } |
| |
| if (scno < 0 || scno > nsyscalls) { |
| if(a3 == 0 || a3 == -1) { |
| if(debug) |
| fprintf (stderr, "stray syscall exit: v0 = %ld\n", scno); |
| return 0; |
| } |
| } |
| } else { |
| if (upeek(tcp, REG_V0, &r2) < 0) |
| return -1; |
| } |
| # elif defined (ALPHA) |
| if (upeek(tcp, REG_A3, &a3) < 0) |
| return -1; |
| |
| if (!(tcp->flags & TCB_INSYSCALL)) { |
| if (upeek(tcp, REG_R0, &scno) < 0) |
| return -1; |
| |
| /* Check if we return from execve. */ |
| if (scno == 0 && tcp->flags & TCB_WAITEXECVE) { |
| tcp->flags &= ~TCB_WAITEXECVE; |
| return 0; |
| } |
| |
| /* |
| * Do some sanity checks to figure out if it's |
| * really a syscall entry |
| */ |
| if (scno < 0 || scno > nsyscalls) { |
| if (a3 == 0 || a3 == -1) { |
| if (debug) |
| fprintf (stderr, "stray syscall exit: r0 = %ld\n", scno); |
| return 0; |
| } |
| } |
| } |
| else { |
| if (upeek(tcp, REG_R0, &r0) < 0) |
| return -1; |
| } |
| # elif defined (SPARC) || defined (SPARC64) |
| /* Everything we need is in the current register set. */ |
| if (ptrace(PTRACE_GETREGS, tcp->pid, (char *)®s, 0) < 0) |
| return -1; |
| |
| /* If we are entering, then disassemble the syscall trap. */ |
| if (!(tcp->flags & TCB_INSYSCALL)) { |
| /* Retrieve the syscall trap instruction. */ |
| errno = 0; |
| # if defined(SPARC64) |
| trap = ptrace(PTRACE_PEEKTEXT, tcp->pid, (char *)regs.tpc, 0); |
| trap >>= 32; |
| # else |
| trap = ptrace(PTRACE_PEEKTEXT, tcp->pid, (char *)regs.pc, 0); |
| # endif |
| if (errno) |
| return -1; |
| |
| /* Disassemble the trap to see what personality to use. */ |
| switch (trap) { |
| case 0x91d02010: |
| /* Linux/SPARC syscall trap. */ |
| set_personality(0); |
| break; |
| case 0x91d0206d: |
| /* Linux/SPARC64 syscall trap. */ |
| set_personality(2); |
| break; |
| case 0x91d02000: |
| /* SunOS syscall trap. (pers 1) */ |
| fprintf(stderr,"syscall: SunOS no support\n"); |
| return -1; |
| case 0x91d02008: |
| /* Solaris 2.x syscall trap. (per 2) */ |
| set_personality(1); |
| break; |
| case 0x91d02009: |
| /* NetBSD/FreeBSD syscall trap. */ |
| fprintf(stderr,"syscall: NetBSD/FreeBSD not supported\n"); |
| return -1; |
| case 0x91d02027: |
| /* Solaris 2.x gettimeofday */ |
| set_personality(1); |
| break; |
| default: |
| /* Unknown syscall trap. */ |
| if(tcp->flags & TCB_WAITEXECVE) { |
| tcp->flags &= ~TCB_WAITEXECVE; |
| return 0; |
| } |
| # if defined (SPARC64) |
| fprintf(stderr,"syscall: unknown syscall trap %08lx %016lx\n", trap, regs.tpc); |
| # else |
| fprintf(stderr,"syscall: unknown syscall trap %08lx %08lx\n", trap, regs.pc); |
| # endif |
| return -1; |
| } |
| |
| /* Extract the system call number from the registers. */ |
| if (trap == 0x91d02027) |
| scno = 156; |
| else |
| scno = regs.u_regs[U_REG_G1]; |
| if (scno == 0) { |
| scno = regs.u_regs[U_REG_O0]; |
| memmove (®s.u_regs[U_REG_O0], ®s.u_regs[U_REG_O1], 7*sizeof(regs.u_regs[0])); |
| } |
| } |
| # elif defined(HPPA) |
| if (upeek(tcp, PT_GR20, &scno) < 0) |
| return -1; |
| if (!(tcp->flags & TCB_INSYSCALL)) { |
| /* Check if we return from execve. */ |
| if ((tcp->flags & TCB_WAITEXECVE)) { |
| tcp->flags &= ~TCB_WAITEXECVE; |
| return 0; |
| } |
| } |
| # elif defined(SH) |
| /* |
| * In the new syscall ABI, the system call number is in R3. |
| */ |
| if (upeek(tcp, 4*(REG_REG0+3), &scno) < 0) |
| return -1; |
| |
| if (scno < 0) { |
| /* Odd as it may seem, a glibc bug has been known to cause |
| glibc to issue bogus negative syscall numbers. So for |
| our purposes, make strace print what it *should* have been */ |
| long correct_scno = (scno & 0xff); |
| if (debug) |
| fprintf(stderr, |
| "Detected glibc bug: bogus system call" |
| " number = %ld, correcting to %ld\n", |
| scno, |
| correct_scno); |
| scno = correct_scno; |
| } |
| |
| if (!(tcp->flags & TCB_INSYSCALL)) { |
| /* Check if we return from execve. */ |
| if (scno == 0 && tcp->flags & TCB_WAITEXECVE) { |
| tcp->flags &= ~TCB_WAITEXECVE; |
| return 0; |
| } |
| } |
| # elif defined(SH64) |
| if (upeek(tcp, REG_SYSCALL, &scno) < 0) |
| return -1; |
| scno &= 0xFFFF; |
| |
| if (!(tcp->flags & TCB_INSYSCALL)) { |
| /* Check if we return from execve. */ |
| if (tcp->flags & TCB_WAITEXECVE) { |
| tcp->flags &= ~TCB_WAITEXECVE; |
| return 0; |
| } |
| } |
| # elif defined(CRISV10) || defined(CRISV32) |
| if (upeek(tcp, 4*PT_R9, &scno) < 0) |
| return -1; |
| # elif defined(TILE) |
| if (upeek(tcp, PTREGS_OFFSET_REG(10), &scno) < 0) |
| return -1; |
| |
| if (!(tcp->flags & TCB_INSYSCALL)) { |
| /* Check if we return from execve. */ |
| if (tcp->flags & TCB_WAITEXECVE) { |
| tcp->flags &= ~TCB_WAITEXECVE; |
| return 0; |
| } |
| } |
| # elif defined(MICROBLAZE) |
| if (upeek(tcp, 0, &scno) < 0) |
| return -1; |
| # endif |
| #endif /* LINUX */ |
| |
| #ifdef SUNOS4 |
| if (upeek(tcp, uoff(u_arg[7]), &scno) < 0) |
| return -1; |
| #elif defined(SH) |
| /* new syscall ABI returns result in R0 */ |
| if (upeek(tcp, 4*REG_REG0, (long *)&r0) < 0) |
| return -1; |
| #elif defined(SH64) |
| /* ABI defines result returned in r9 */ |
| if (upeek(tcp, REG_GENERAL(9), (long *)&r9) < 0) |
| return -1; |
| #endif |
| |
| #ifdef USE_PROCFS |
| # ifdef HAVE_PR_SYSCALL |
| scno = tcp->status.PR_SYSCALL; |
| # else |
| # ifndef FREEBSD |
| scno = tcp->status.PR_WHAT; |
| # else |
| if (pread(tcp->pfd_reg, ®s, sizeof(regs), 0) < 0) { |
| perror("pread"); |
| return -1; |
| } |
| switch (regs.r_eax) { |
| case SYS_syscall: |
| case SYS___syscall: |
| pread(tcp->pfd, &scno, sizeof(scno), regs.r_esp + sizeof(int)); |
| break; |
| default: |
| scno = regs.r_eax; |
| break; |
| } |
| # endif /* FREEBSD */ |
| # endif /* !HAVE_PR_SYSCALL */ |
| #endif /* USE_PROCFS */ |
| |
| if (!(tcp->flags & TCB_INSYSCALL)) |
| tcp->scno = scno; |
| return 1; |
| } |
| |
| |
| long |
| known_scno(struct tcb *tcp) |
| { |
| long scno = tcp->scno; |
| #if SUPPORTED_PERSONALITIES > 1 |
| if (scno >= 0 && scno < nsyscalls && sysent[scno].native_scno != 0) |
| scno = sysent[scno].native_scno; |
| else |
| #endif |
| scno += NR_SYSCALL_BASE; |
| return scno; |
| } |
| |
| /* Called in trace_syscall() at each syscall entry and exit. |
| * Returns: |
| * 0: "ignore this syscall", bail out of trace_syscall() silently. |
| * 1: ok, continue in trace_syscall(). |
| * other: error, trace_syscall() should print error indicator |
| * ("????" etc) and bail out. |
| */ |
| static int |
| syscall_fixup(struct tcb *tcp) |
| { |
| #ifdef USE_PROCFS |
| int scno = known_scno(tcp); |
| |
| if (!(tcp->flags & TCB_INSYSCALL)) { |
| if (tcp->status.PR_WHY != PR_SYSENTRY) { |
| if ( |
| scno == SYS_fork |
| #ifdef SYS_vfork |
| || scno == SYS_vfork |
| #endif /* SYS_vfork */ |
| #ifdef SYS_fork1 |
| || scno == SYS_fork1 |
| #endif /* SYS_fork1 */ |
| #ifdef SYS_forkall |
| || scno == SYS_forkall |
| #endif /* SYS_forkall */ |
| #ifdef SYS_rfork1 |
| || scno == SYS_rfork1 |
| #endif /* SYS_fork1 */ |
| #ifdef SYS_rforkall |
| || scno == SYS_rforkall |
| #endif /* SYS_rforkall */ |
| ) { |
| /* We are returning in the child, fake it. */ |
| tcp->status.PR_WHY = PR_SYSENTRY; |
| trace_syscall(tcp); |
| tcp->status.PR_WHY = PR_SYSEXIT; |
| } |
| else { |
| fprintf(stderr, "syscall: missing entry\n"); |
| tcp->flags |= TCB_INSYSCALL; |
| } |
| } |
| } |
| else { |
| if (tcp->status.PR_WHY != PR_SYSEXIT) { |
| fprintf(stderr, "syscall: missing exit\n"); |
| tcp->flags &= ~TCB_INSYSCALL; |
| } |
| } |
| #endif /* USE_PROCFS */ |
| #ifdef SUNOS4 |
| if (!(tcp->flags & TCB_INSYSCALL)) { |
| if (scno == 0) { |
| fprintf(stderr, "syscall: missing entry\n"); |
| tcp->flags |= TCB_INSYSCALL; |
| } |
| } |
| else { |
| if (scno != 0) { |
| if (debug) { |
| /* |
| * This happens when a signal handler |
| * for a signal which interrupted a |
| * a system call makes another system call. |
| */ |
| fprintf(stderr, "syscall: missing exit\n"); |
| } |
| tcp->flags &= ~TCB_INSYSCALL; |
| } |
| } |
| #endif /* SUNOS4 */ |
| #ifdef LINUX |
| #if defined (I386) |
| if (upeek(tcp, 4*EAX, &eax) < 0) |
| return -1; |
| if (eax != -ENOSYS && !(tcp->flags & TCB_INSYSCALL)) { |
| if (debug) |
| fprintf(stderr, "stray syscall exit: eax = %ld\n", eax); |
| return 0; |
| } |
| #elif defined (X86_64) |
| if (upeek(tcp, 8*RAX, &rax) < 0) |
| return -1; |
| if (current_personality == 1) |
| rax = (long int)(int)rax; /* sign extend from 32 bits */ |
| if (rax != -ENOSYS && !(tcp->flags & TCB_INSYSCALL)) { |
| if (debug) |
| fprintf(stderr, "stray syscall exit: rax = %ld\n", rax); |
| return 0; |
| } |
| #elif defined (S390) || defined (S390X) |
| if (upeek(tcp, PT_GPR2, &gpr2) < 0) |
| return -1; |
| if (syscall_mode != -ENOSYS) |
| syscall_mode = tcp->scno; |
| if (gpr2 != syscall_mode && !(tcp->flags & TCB_INSYSCALL)) { |
| if (debug) |
| fprintf(stderr, "stray syscall exit: gpr2 = %ld\n", gpr2); |
| return 0; |
| } |
| else if (((tcp->flags & (TCB_INSYSCALL|TCB_WAITEXECVE)) |
| == (TCB_INSYSCALL|TCB_WAITEXECVE)) |
| && (gpr2 == -ENOSYS || gpr2 == tcp->scno)) { |
| /* |
| * Fake a return value of zero. We leave the TCB_WAITEXECVE |
| * flag set for the post-execve SIGTRAP to see and reset. |
| */ |
| gpr2 = 0; |
| } |
| #elif defined (POWERPC) |
| # define SO_MASK 0x10000000 |
| if (upeek(tcp, sizeof(unsigned long)*PT_CCR, &flags) < 0) |
| return -1; |
| if (upeek(tcp, sizeof(unsigned long)*PT_R3, &result) < 0) |
| return -1; |
| if (flags & SO_MASK) |
| result = -result; |
| #elif defined (M68K) |
| if (upeek(tcp, 4*PT_D0, &d0) < 0) |
| return -1; |
| if (d0 != -ENOSYS && !(tcp->flags & TCB_INSYSCALL)) { |
| if (debug) |
| fprintf(stderr, "stray syscall exit: d0 = %ld\n", d0); |
| return 0; |
| } |
| #elif defined (ARM) |
| /* |
| * Nothing required |
| */ |
| #elif defined(BFIN) |
| if (upeek(tcp, PT_R0, &r0) < 0) |
| return -1; |
| #elif defined (HPPA) |
| if (upeek(tcp, PT_GR28, &r28) < 0) |
| return -1; |
| #elif defined(IA64) |
| if (upeek(tcp, PT_R10, &r10) < 0) |
| return -1; |
| if (upeek(tcp, PT_R8, &r8) < 0) |
| return -1; |
| if (ia32 && r8 != -ENOSYS && !(tcp->flags & TCB_INSYSCALL)) { |
| if (debug) |
| fprintf(stderr, "stray syscall exit: r8 = %ld\n", r8); |
| return 0; |
| } |
| #elif defined(CRISV10) || defined(CRISV32) |
| if (upeek(tcp, 4*PT_R10, &r10) < 0) |
| return -1; |
| if (r10 != -ENOSYS && !(tcp->flags & TCB_INSYSCALL)) { |
| if (debug) |
| fprintf(stderr, "stray syscall exit: r10 = %ld\n", r10); |
| return 0; |
| } |
| #elif defined(MICROBLAZE) |
| if (upeek(tcp, 3 * 4, &r3) < 0) |
| return -1; |
| if (r3 != -ENOSYS && !(tcp->flags & TCB_INSYSCALL)) { |
| if (debug) |
| fprintf(stderr, "stray syscall exit: r3 = %ld\n", r3); |
| return 0; |
| } |
| #endif |
| #endif /* LINUX */ |
| return 1; |
| } |
| |
| #ifdef LINUX |
| /* |
| * Check the syscall return value register value for whether it is |
| * a negated errno code indicating an error, or a success return value. |
| */ |
| static inline int |
| is_negated_errno(unsigned long int val) |
| { |
| unsigned long int max = -(long int) nerrnos; |
| if (personality_wordsize[current_personality] < sizeof(val)) { |
| val = (unsigned int) val; |
| max = (unsigned int) max; |
| } |
| return val > max; |
| } |
| #endif |
| |
| static int |
| get_error(struct tcb *tcp) |
| { |
| int u_error = 0; |
| #ifdef LINUX |
| int check_errno = 1; |
| if (tcp->scno >= 0 && tcp->scno < nsyscalls && |
| sysent[tcp->scno].sys_flags & SYSCALL_NEVER_FAILS) { |
| check_errno = 0; |
| } |
| # if defined(S390) || defined(S390X) |
| if (check_errno && is_negated_errno(gpr2)) { |
| tcp->u_rval = -1; |
| u_error = -gpr2; |
| } |
| else { |
| tcp->u_rval = gpr2; |
| u_error = 0; |
| } |
| # elif defined(I386) |
| if (check_errno && is_negated_errno(eax)) { |
| tcp->u_rval = -1; |
| u_error = -eax; |
| } |
| else { |
| tcp->u_rval = eax; |
| u_error = 0; |
| } |
| # elif defined(X86_64) |
| if (check_errno && is_negated_errno(rax)) { |
| tcp->u_rval = -1; |
| u_error = -rax; |
| } |
| else { |
| tcp->u_rval = rax; |
| u_error = 0; |
| } |
| # elif defined(IA64) |
| if (ia32) { |
| int err; |
| |
| err = (int)r8; |
| if (check_errno && is_negated_errno(err)) { |
| tcp->u_rval = -1; |
| u_error = -err; |
| } |
| else { |
| tcp->u_rval = err; |
| u_error = 0; |
| } |
| } else { |
| if (check_errno && r10) { |
| tcp->u_rval = -1; |
| u_error = r8; |
| } else { |
| tcp->u_rval = r8; |
| u_error = 0; |
| } |
| } |
| # elif defined(MIPS) |
| if (check_errno && a3) { |
| tcp->u_rval = -1; |
| u_error = r2; |
| } else { |
| tcp->u_rval = r2; |
| u_error = 0; |
| } |
| # elif defined(POWERPC) |
| if (check_errno && is_negated_errno(result)) { |
| tcp->u_rval = -1; |
| u_error = -result; |
| } |
| else { |
| tcp->u_rval = result; |
| u_error = 0; |
| } |
| # elif defined(M68K) |
| if (check_errno && is_negated_errno(d0)) { |
| tcp->u_rval = -1; |
| u_error = -d0; |
| } |
| else { |
| tcp->u_rval = d0; |
| u_error = 0; |
| } |
| # elif defined(ARM) |
| if (check_errno && is_negated_errno(regs.ARM_r0)) { |
| tcp->u_rval = -1; |
| u_error = -regs.ARM_r0; |
| } |
| else { |
| tcp->u_rval = regs.ARM_r0; |
| u_error = 0; |
| } |
| # elif defined(AVR32) |
| if (check_errno && regs.r12 && (unsigned) -regs.r12 < nerrnos) { |
| tcp->u_rval = -1; |
| u_error = -regs.r12; |
| } |
| else { |
| tcp->u_rval = regs.r12; |
| u_error = 0; |
| } |
| # elif defined(BFIN) |
| if (check_errno && is_negated_errno(r0)) { |
| tcp->u_rval = -1; |
| u_error = -r0; |
| } else { |
| tcp->u_rval = r0; |
| u_error = 0; |
| } |
| # elif defined(ALPHA) |
| if (check_errno && a3) { |
| tcp->u_rval = -1; |
| u_error = r0; |
| } |
| else { |
| tcp->u_rval = r0; |
| u_error = 0; |
| } |
| # elif defined(SPARC) |
| if (check_errno && regs.psr & PSR_C) { |
| tcp->u_rval = -1; |
| u_error = regs.u_regs[U_REG_O0]; |
| } |
| else { |
| tcp->u_rval = regs.u_regs[U_REG_O0]; |
| u_error = 0; |
| } |
| # elif defined(SPARC64) |
| if (check_errno && regs.tstate & 0x1100000000UL) { |
| tcp->u_rval = -1; |
| u_error = regs.u_regs[U_REG_O0]; |
| } |
| else { |
| tcp->u_rval = regs.u_regs[U_REG_O0]; |
| u_error = 0; |
| } |
| # elif defined(HPPA) |
| if (check_errno && is_negated_errno(r28)) { |
| tcp->u_rval = -1; |
| u_error = -r28; |
| } |
| else { |
| tcp->u_rval = r28; |
| u_error = 0; |
| } |
| # elif defined(SH) |
| /* interpret R0 as return value or error number */ |
| if (check_errno && is_negated_errno(r0)) { |
| tcp->u_rval = -1; |
| u_error = -r0; |
| } |
| else { |
| tcp->u_rval = r0; |
| u_error = 0; |
| } |
| # elif defined(SH64) |
| /* interpret result as return value or error number */ |
| if (check_errno && is_negated_errno(r9)) { |
| tcp->u_rval = -1; |
| u_error = -r9; |
| } |
| else { |
| tcp->u_rval = r9; |
| u_error = 0; |
| } |
| # elif defined(CRISV10) || defined(CRISV32) |
| if (check_errno && r10 && (unsigned) -r10 < nerrnos) { |
| tcp->u_rval = -1; |
| u_error = -r10; |
| } |
| else { |
| tcp->u_rval = r10; |
| u_error = 0; |
| } |
| # elif defined(TILE) |
| long rval; |
| /* interpret result as return value or error number */ |
| if (upeek(tcp, PTREGS_OFFSET_REG(0), &rval) < 0) |
| return -1; |
| if (check_errno && rval < 0 && rval > -nerrnos) { |
| tcp->u_rval = -1; |
| u_error = -rval; |
| } |
| else { |
| tcp->u_rval = rval; |
| u_error = 0; |
| } |
| # elif defined(MICROBLAZE) |
| /* interpret result as return value or error number */ |
| if (check_errno && is_negated_errno(r3)) { |
| tcp->u_rval = -1; |
| u_error = -r3; |
| } |
| else { |
| tcp->u_rval = r3; |
| u_error = 0; |
| } |
| # endif |
| #endif /* LINUX */ |
| #ifdef SUNOS4 |
| /* get error code from user struct */ |
| if (upeek(tcp, uoff(u_error), &u_error) < 0) |
| return -1; |
| u_error >>= 24; /* u_error is a char */ |
| |
| /* get system call return value */ |
| if (upeek(tcp, uoff(u_rval1), &tcp->u_rval) < 0) |
| return -1; |
| #endif /* SUNOS4 */ |
| #ifdef SVR4 |
| #ifdef SPARC |
| /* Judicious guessing goes a long way. */ |
| if (tcp->status.pr_reg[R_PSR] & 0x100000) { |
| tcp->u_rval = -1; |
| u_error = tcp->status.pr_reg[R_O0]; |
| } |
| else { |
| tcp->u_rval = tcp->status.pr_reg[R_O0]; |
| u_error = 0; |
| } |
| #endif /* SPARC */ |
| #ifdef I386 |
| /* Wanna know how to kill an hour single-stepping? */ |
| if (tcp->status.PR_REG[EFL] & 0x1) { |
| tcp->u_rval = -1; |
| u_error = tcp->status.PR_REG[EAX]; |
| } |
| else { |
| tcp->u_rval = tcp->status.PR_REG[EAX]; |
| #ifdef HAVE_LONG_LONG |
| tcp->u_lrval = |
| ((unsigned long long) tcp->status.PR_REG[EDX] << 32) + |
| tcp->status.PR_REG[EAX]; |
| #endif |
| u_error = 0; |
| } |
| #endif /* I386 */ |
| #ifdef X86_64 |
| /* Wanna know how to kill an hour single-stepping? */ |
| if (tcp->status.PR_REG[EFLAGS] & 0x1) { |
| tcp->u_rval = -1; |
| u_error = tcp->status.PR_REG[RAX]; |
| } |
| else { |
| tcp->u_rval = tcp->status.PR_REG[RAX]; |
| u_error = 0; |
| } |
| #endif /* X86_64 */ |
| #ifdef MIPS |
| if (tcp->status.pr_reg[CTX_A3]) { |
| tcp->u_rval = -1; |
| u_error = tcp->status.pr_reg[CTX_V0]; |
| } |
| else { |
| tcp->u_rval = tcp->status.pr_reg[CTX_V0]; |
| u_error = 0; |
| } |
| #endif /* MIPS */ |
| #endif /* SVR4 */ |
| #ifdef FREEBSD |
| if (regs.r_eflags & PSL_C) { |
| tcp->u_rval = -1; |
| u_error = regs.r_eax; |
| } else { |
| tcp->u_rval = regs.r_eax; |
| tcp->u_lrval = |
| ((unsigned long long) regs.r_edx << 32) + regs.r_eax; |
| u_error = 0; |
| } |
| #endif /* FREEBSD */ |
| tcp->u_error = u_error; |
| return 1; |
| } |
| |
| int |
| force_result(tcp, error, rval) |
| struct tcb *tcp; |
| int error; |
| long rval; |
| { |
| #ifdef LINUX |
| # if defined(S390) || defined(S390X) |
| gpr2 = error ? -error : rval; |
| if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)PT_GPR2, gpr2) < 0) |
| return -1; |
| # elif defined(I386) |
| eax = error ? -error : rval; |
| if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(EAX * 4), eax) < 0) |
| return -1; |
| # elif defined(X86_64) |
| rax = error ? -error : rval; |
| if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(RAX * 8), rax) < 0) |
| return -1; |
| # elif defined(IA64) |
| if (ia32) { |
| r8 = error ? -error : rval; |
| if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(PT_R8), r8) < 0) |
| return -1; |
| } |
| else { |
| if (error) { |
| r8 = error; |
| r10 = -1; |
| } |
| else { |
| r8 = rval; |
| r10 = 0; |
| } |
| if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(PT_R8), r8) < 0 || |
| ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(PT_R10), r10) < 0) |
| return -1; |
| } |
| # elif defined(BFIN) |
| r0 = error ? -error : rval; |
| if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)PT_R0, r0) < 0) |
| return -1; |
| # elif defined(MIPS) |
| if (error) { |
| r2 = error; |
| a3 = -1; |
| } |
| else { |
| r2 = rval; |
| a3 = 0; |
| } |
| /* PTRACE_POKEUSER is OK even for n32 since rval is only a long. */ |
| if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(REG_A3), a3) < 0 || |
| ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(REG_V0), r2) < 0) |
| return -1; |
| # elif defined(POWERPC) |
| if (upeek(tcp, sizeof(unsigned long)*PT_CCR, &flags) < 0) |
| return -1; |
| if (error) { |
| flags |= SO_MASK; |
| result = error; |
| } |
| else { |
| flags &= ~SO_MASK; |
| result = rval; |
| } |
| if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(sizeof(unsigned long)*PT_CCR), flags) < 0 || |
| ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(sizeof(unsigned long)*PT_R3), result) < 0) |
| return -1; |
| # elif defined(M68K) |
| d0 = error ? -error : rval; |
| if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(4*PT_D0), d0) < 0) |
| return -1; |
| # elif defined(ARM) |
| regs.ARM_r0 = error ? -error : rval; |
| if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(4*0), regs.ARM_r0) < 0) |
| return -1; |
| # elif defined(AVR32) |
| regs.r12 = error ? -error : rval; |
| if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)REG_R12, regs.r12) < 0) |
| return -1; |
| # elif defined(ALPHA) |
| if (error) { |
| a3 = -1; |
| r0 = error; |
| } |
| else { |
| a3 = 0; |
| r0 = rval; |
| } |
| if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(REG_A3), a3) < 0 || |
| ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(REG_R0), r0) < 0) |
| return -1; |
| # elif defined(SPARC) |
| if (ptrace(PTRACE_GETREGS, tcp->pid, (char *)®s, 0) < 0) |
| return -1; |
| if (error) { |
| regs.psr |= PSR_C; |
| regs.u_regs[U_REG_O0] = error; |
| } |
| else { |
| regs.psr &= ~PSR_C; |
| regs.u_regs[U_REG_O0] = rval; |
| } |
| if (ptrace(PTRACE_SETREGS, tcp->pid, (char *)®s, 0) < 0) |
| return -1; |
| # elif defined(SPARC64) |
| if (ptrace(PTRACE_GETREGS, tcp->pid, (char *)®s, 0) < 0) |
| return -1; |
| if (error) { |
| regs.tstate |= 0x1100000000UL; |
| regs.u_regs[U_REG_O0] = error; |
| } |
| else { |
| regs.tstate &= ~0x1100000000UL; |
| regs.u_regs[U_REG_O0] = rval; |
| } |
| if (ptrace(PTRACE_SETREGS, tcp->pid, (char *)®s, 0) < 0) |
| return -1; |
| # elif defined(HPPA) |
| r28 = error ? -error : rval; |
| if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(PT_GR28), r28) < 0) |
| return -1; |
| # elif defined(SH) |
| r0 = error ? -error : rval; |
| if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)(4*REG_REG0), r0) < 0) |
| return -1; |
| # elif defined(SH64) |
| r9 = error ? -error : rval; |
| if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)REG_GENERAL(9), r9) < 0) |
| return -1; |
| # endif |
| #endif /* LINUX */ |
| |
| #ifdef SUNOS4 |
| if (ptrace(PTRACE_POKEUSER, tcp->pid, (char*)uoff(u_error), |
| error << 24) < 0 || |
| ptrace(PTRACE_POKEUSER, tcp->pid, (char*)uoff(u_rval1), rval) < 0) |
| return -1; |
| #endif /* SUNOS4 */ |
| |
| #ifdef SVR4 |
| /* XXX no clue */ |
| return -1; |
| #endif /* SVR4 */ |
| |
| #ifdef FREEBSD |
| if (pread(tcp->pfd_reg, ®s, sizeof(regs), 0) < 0) { |
| perror("pread"); |
| return -1; |
| } |
| if (error) { |
| regs.r_eflags |= PSL_C; |
| regs.r_eax = error; |
| } |
| else { |
| regs.r_eflags &= ~PSL_C; |
| regs.r_eax = rval; |
| } |
| if (pwrite(tcp->pfd_reg, ®s, sizeof(regs), 0) < 0) { |
| perror("pwrite"); |
| return -1; |
| } |
| #endif /* FREEBSD */ |
| |
| /* All branches reach here on success (only). */ |
| tcp->u_error = error; |
| tcp->u_rval = rval; |
| return 0; |
| } |
| |
| static int |
| syscall_enter(struct tcb *tcp) |
| { |
| #ifdef LINUX |
| #if defined(S390) || defined(S390X) |
| { |
| int i; |
| if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1) |
| tcp->u_nargs = sysent[tcp->scno].nargs; |
| else |
| tcp->u_nargs = MAX_ARGS; |
| for (i = 0; i < tcp->u_nargs; i++) { |
| if (upeek(tcp,i==0 ? PT_ORIGGPR2:PT_GPR2+i*sizeof(long), &tcp->u_arg[i]) < 0) |
| return -1; |
| } |
| } |
| #elif defined (ALPHA) |
| { |
| int i; |
| if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1) |
| tcp->u_nargs = sysent[tcp->scno].nargs; |
| else |
| tcp->u_nargs = MAX_ARGS; |
| for (i = 0; i < tcp->u_nargs; i++) { |
| /* WTA: if scno is out-of-bounds this will bomb. Add range-check |
| * for scno somewhere above here! |
| */ |
| if (upeek(tcp, REG_A0+i, &tcp->u_arg[i]) < 0) |
| return -1; |
| } |
| } |
| #elif defined (IA64) |
| { |
| if (!ia32) { |
| unsigned long *out0, cfm, sof, sol, i; |
| long rbs_end; |
| /* be backwards compatible with kernel < 2.4.4... */ |
| # ifndef PT_RBS_END |
| # define PT_RBS_END PT_AR_BSP |
| # endif |
| |
| if (upeek(tcp, PT_RBS_END, &rbs_end) < 0) |
| return -1; |
| if (upeek(tcp, PT_CFM, (long *) &cfm) < 0) |
| return -1; |
| |
| sof = (cfm >> 0) & 0x7f; |
| sol = (cfm >> 7) & 0x7f; |
| out0 = ia64_rse_skip_regs((unsigned long *) rbs_end, -sof + sol); |
| |
| if (tcp->scno >= 0 && tcp->scno < nsyscalls |
| && sysent[tcp->scno].nargs != -1) |
| tcp->u_nargs = sysent[tcp->scno].nargs; |
| else |
| tcp->u_nargs = MAX_ARGS; |
| for (i = 0; i < tcp->u_nargs; ++i) { |
| if (umoven(tcp, (unsigned long) ia64_rse_skip_regs(out0, i), |
| sizeof(long), (char *) &tcp->u_arg[i]) < 0) |
| return -1; |
| } |
| } else { |
| int i; |
| |
| if (/* EBX = out0 */ |
| upeek(tcp, PT_R11, (long *) &tcp->u_arg[0]) < 0 |
| /* ECX = out1 */ |
| || upeek(tcp, PT_R9, (long *) &tcp->u_arg[1]) < 0 |
| /* EDX = out2 */ |
| || upeek(tcp, PT_R10, (long *) &tcp->u_arg[2]) < 0 |
| /* ESI = out3 */ |
| || upeek(tcp, PT_R14, (long *) &tcp->u_arg[3]) < 0 |
| /* EDI = out4 */ |
| || upeek(tcp, PT_R15, (long *) &tcp->u_arg[4]) < 0 |
| /* EBP = out5 */ |
| || upeek(tcp, PT_R13, (long *) &tcp->u_arg[5]) < 0) |
| return -1; |
| |
| for (i = 0; i < 6; ++i) |
| /* truncate away IVE sign-extension */ |
| tcp->u_arg[i] &= 0xffffffff; |
| |
| if (tcp->scno >= 0 && tcp->scno < nsyscalls |
| && sysent[tcp->scno].nargs != -1) |
| tcp->u_nargs = sysent[tcp->scno].nargs; |
| else |
| tcp->u_nargs = 5; |
| } |
| } |
| #elif defined (LINUX_MIPSN32) || defined (LINUX_MIPSN64) |
| /* N32 and N64 both use up to six registers. */ |
| { |
| unsigned long long regs[38]; |
| int i, nargs; |
| |
| if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1) |
| nargs = tcp->u_nargs = sysent[tcp->scno].nargs; |
| else |
| nargs = tcp->u_nargs = MAX_ARGS; |
| |
| if (ptrace (PTRACE_GETREGS, tcp->pid, NULL, (long) ®s) < 0) |
| return -1; |
| |
| for(i = 0; i < nargs; i++) { |
| tcp->u_arg[i] = regs[REG_A0 + i]; |
| # if defined (LINUX_MIPSN32) |
| tcp->ext_arg[i] = regs[REG_A0 + i]; |
| # endif |
| } |
| } |
| #elif defined (MIPS) |
| { |
| long sp; |
| int i, nargs; |
| |
| if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1) |
| nargs = tcp->u_nargs = sysent[tcp->scno].nargs; |
| else |
| nargs = tcp->u_nargs = MAX_ARGS; |
| if(nargs > 4) { |
| if(upeek(tcp, REG_SP, &sp) < 0) |
| return -1; |
| for(i = 0; i < 4; i++) { |
| if (upeek(tcp, REG_A0 + i, &tcp->u_arg[i])<0) |
| return -1; |
| } |
| umoven(tcp, sp+16, (nargs-4) * sizeof(tcp->u_arg[0]), |
| (char *)(tcp->u_arg + 4)); |
| } else { |
| for(i = 0; i < nargs; i++) { |
| if (upeek(tcp, REG_A0 + i, &tcp->u_arg[i]) < 0) |
| return -1; |
| } |
| } |
| } |
| #elif defined (POWERPC) |
| # ifndef PT_ORIG_R3 |
| # define PT_ORIG_R3 34 |
| # endif |
| { |
| int i; |
| if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1) |
| tcp->u_nargs = sysent[tcp->scno].nargs; |
| else |
| tcp->u_nargs = MAX_ARGS; |
| for (i = 0; i < tcp->u_nargs; i++) { |
| if (upeek(tcp, (i==0) ? |
| (sizeof(unsigned long)*PT_ORIG_R3) : |
| ((i+PT_R3)*sizeof(unsigned long)), |
| &tcp->u_arg[i]) < 0) |
| return -1; |
| } |
| } |
| #elif defined (SPARC) || defined (SPARC64) |
| { |
| int i; |
| |
| if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1) |
| tcp->u_nargs = sysent[tcp->scno].nargs; |
| else |
| tcp->u_nargs = MAX_ARGS; |
| for (i = 0; i < tcp->u_nargs; i++) |
| tcp->u_arg[i] = regs.u_regs[U_REG_O0 + i]; |
| } |
| #elif defined (HPPA) |
| { |
| int i; |
| |
| if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1) |
| tcp->u_nargs = sysent[tcp->scno].nargs; |
| else |
| tcp->u_nargs = MAX_ARGS; |
| for (i = 0; i < tcp->u_nargs; i++) { |
| if (upeek(tcp, PT_GR26-4*i, &tcp->u_arg[i]) < 0) |
| return -1; |
| } |
| } |
| #elif defined(ARM) |
| { |
| int i; |
| |
| if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1) |
| tcp->u_nargs = sysent[tcp->scno].nargs; |
| else |
| tcp->u_nargs = MAX_ARGS; |
| for (i = 0; i < tcp->u_nargs; i++) |
| tcp->u_arg[i] = regs.uregs[i]; |
| } |
| #elif defined(AVR32) |
| tcp->u_nargs = sysent[tcp->scno].nargs; |
| tcp->u_arg[0] = regs.r12; |
| tcp->u_arg[1] = regs.r11; |
| tcp->u_arg[2] = regs.r10; |
| tcp->u_arg[3] = regs.r9; |
| tcp->u_arg[4] = regs.r5; |
| tcp->u_arg[5] = regs.r3; |
| #elif defined(BFIN) |
| { |
| int i; |
| int argreg[] = {PT_R0, PT_R1, PT_R2, PT_R3, PT_R4, PT_R5}; |
| |
| if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1) |
| tcp->u_nargs = sysent[tcp->scno].nargs; |
| else |
| tcp->u_nargs = sizeof(argreg) / sizeof(argreg[0]); |
| |
| for (i = 0; i < tcp->u_nargs; ++i) |
| if (upeek(tcp, argreg[i], &tcp->u_arg[i]) < 0) |
| return -1; |
| } |
| #elif defined(SH) |
| { |
| int i; |
| static int syscall_regs[] = { |
| REG_REG0+4, REG_REG0+5, REG_REG0+6, REG_REG0+7, |
| REG_REG0, REG_REG0+1, REG_REG0+2 |
| }; |
| |
| tcp->u_nargs = sysent[tcp->scno].nargs; |
| for (i = 0; i < tcp->u_nargs; i++) { |
| if (upeek(tcp, 4*syscall_regs[i], &tcp->u_arg[i]) < 0) |
| return -1; |
| } |
| } |
| #elif defined(SH64) |
| { |
| int i; |
| /* Registers used by SH5 Linux system calls for parameters */ |
| static int syscall_regs[] = { 2, 3, 4, 5, 6, 7 }; |
| |
| /* |
| * TODO: should also check that the number of arguments encoded |
| * in the trap number matches the number strace expects. |
| */ |
| /* |
| assert(sysent[tcp->scno].nargs < |
| sizeof(syscall_regs)/sizeof(syscall_regs[0])); |
| */ |
| |
| tcp->u_nargs = sysent[tcp->scno].nargs; |
| for (i = 0; i < tcp->u_nargs; i++) { |
| if (upeek(tcp, REG_GENERAL(syscall_regs[i]), &tcp->u_arg[i]) < 0) |
| return -1; |
| } |
| } |
| |
| #elif defined(X86_64) |
| { |
| int i; |
| static int argreg[SUPPORTED_PERSONALITIES][MAX_ARGS] = { |
| {RDI,RSI,RDX,R10,R8,R9}, /* x86-64 ABI */ |
| {RBX,RCX,RDX,RSI,RDI,RBP} /* i386 ABI */ |
| }; |
| |
| if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1) |
| tcp->u_nargs = sysent[tcp->scno].nargs; |
| else |
| tcp->u_nargs = MAX_ARGS; |
| for (i = 0; i < tcp->u_nargs; i++) { |
| if (upeek(tcp, argreg[current_personality][i]*8, &tcp->u_arg[i]) < 0) |
| return -1; |
| } |
| } |
| #elif defined(MICROBLAZE) |
| { |
| int i; |
| if (tcp->scno >= 0 && tcp->scno < nsyscalls) |
| tcp->u_nargs = sysent[tcp->scno].nargs; |
| else |
| tcp->u_nargs = 0; |
| for (i = 0; i < tcp->u_nargs; i++) { |
| if (upeek(tcp, (5 + i) * 4, &tcp->u_arg[i]) < 0) |
| return -1; |
| } |
| } |
| #elif defined(CRISV10) || defined(CRISV32) |
| { |
| int i; |
| static const int crisregs[] = { |
| 4*PT_ORIG_R10, 4*PT_R11, 4*PT_R12, |
| 4*PT_R13, 4*PT_MOF, 4*PT_SRP |
| }; |
| |
| if (tcp->scno >= 0 && tcp->scno < nsyscalls) |
| tcp->u_nargs = sysent[tcp->scno].nargs; |
| else |
| tcp->u_nargs = 0; |
| for (i = 0; i < tcp->u_nargs; i++) { |
| if (upeek(tcp, crisregs[i], &tcp->u_arg[i]) < 0) |
| return -1; |
| } |
| } |
| #elif defined(TILE) |
| { |
| int i; |
| if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1) |
| tcp->u_nargs = sysent[tcp->scno].nargs; |
| else |
| tcp->u_nargs = MAX_ARGS; |
| for (i = 0; i < tcp->u_nargs; ++i) { |
| if (upeek(tcp, PTREGS_OFFSET_REG(i), &tcp->u_arg[i]) < 0) |
| return -1; |
| } |
| } |
| #elif defined (M68K) |
| { |
| int i; |
| if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1) |
| tcp->u_nargs = sysent[tcp->scno].nargs; |
| else |
| tcp->u_nargs = MAX_ARGS; |
| for (i = 0; i < tcp->u_nargs; i++) { |
| if (upeek(tcp, (i < 5 ? i : i + 2)*4, &tcp->u_arg[i]) < 0) |
| return -1; |
| } |
| } |
| #else /* Other architecture (like i386) (32bits specific) */ |
| { |
| int i; |
| if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1) |
| tcp->u_nargs = sysent[tcp->scno].nargs; |
| else |
| tcp->u_nargs = MAX_ARGS; |
| for (i = 0; i < tcp->u_nargs; i++) { |
| if (upeek(tcp, i*4, &tcp->u_arg[i]) < 0) |
| return -1; |
| } |
| } |
| #endif |
| #endif /* LINUX */ |
| #ifdef SUNOS4 |
| { |
| int i; |
| if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1) |
| tcp->u_nargs = sysent[tcp->scno].nargs; |
| else |
| tcp->u_nargs = MAX_ARGS; |
| for (i = 0; i < tcp->u_nargs; i++) { |
| struct user *u; |
| |
| if (upeek(tcp, uoff(u_arg[0]) + |
| (i*sizeof(u->u_arg[0])), &tcp->u_arg[i]) < 0) |
| return -1; |
| } |
| } |
| #endif /* SUNOS4 */ |
| #ifdef SVR4 |
| #ifdef MIPS |
| /* |
| * SGI is broken: even though it has pr_sysarg, it doesn't |
| * set them on system call entry. Get a clue. |
| */ |
| if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1) |
| tcp->u_nargs = sysent[tcp->scno].nargs; |
| else |
| tcp->u_nargs = tcp->status.pr_nsysarg; |
| if (tcp->u_nargs > 4) { |
| memcpy(tcp->u_arg, &tcp->status.pr_reg[CTX_A0], |
| 4*sizeof(tcp->u_arg[0])); |
| umoven(tcp, tcp->status.pr_reg[CTX_SP] + 16, |
| (tcp->u_nargs - 4)*sizeof(tcp->u_arg[0]), (char *) (tcp->u_arg + 4)); |
| } |
| else { |
| memcpy(tcp->u_arg, &tcp->status.pr_reg[CTX_A0], |
| tcp->u_nargs*sizeof(tcp->u_arg[0])); |
| } |
| #elif UNIXWARE >= 2 |
| /* |
| * Like SGI, UnixWare doesn't set pr_sysarg until system call exit |
| */ |
| if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1) |
| tcp->u_nargs = sysent[tcp->scno].nargs; |
| else |
| tcp->u_nargs = tcp->status.pr_lwp.pr_nsysarg; |
| umoven(tcp, tcp->status.PR_REG[UESP] + 4, |
| tcp->u_nargs*sizeof(tcp->u_arg[0]), (char *) tcp->u_arg); |
| #elif defined (HAVE_PR_SYSCALL) |
| if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1) |
| tcp->u_nargs = sysent[tcp->scno].nargs; |
| else |
| tcp->u_nargs = tcp->status.pr_nsysarg; |
| { |
| int i; |
| for (i = 0; i < tcp->u_nargs; i++) |
| tcp->u_arg[i] = tcp->status.pr_sysarg[i]; |
| } |
| #elif defined (I386) |
| if (tcp->scno >= 0 && tcp->scno < nsyscalls && sysent[tcp->scno].nargs != -1) |
| tcp->u_nargs = sysent[tcp->scno].nargs; |
| else |
| tcp->u_nargs = 5; |
| umoven(tcp, tcp->status.PR_REG[UESP] + 4, |
| tcp->u_nargs*sizeof(tcp->u_arg[0]), (char *) tcp->u_arg); |
| #else |
| I DONT KNOW WHAT TO DO |
| #endif /* !HAVE_PR_SYSCALL */ |
| #endif /* SVR4 */ |
| #ifdef FREEBSD |
| if (tcp->scno >= 0 && tcp->scno < nsyscalls && |
| sysent[tcp->scno].nargs > tcp->status.val) |
| tcp->u_nargs = sysent[tcp->scno].nargs; |
| else |
| tcp->u_nargs = tcp->status.val; |
| if (tcp->u_nargs < 0) |
| tcp->u_nargs = 0; |
| if (tcp->u_nargs > MAX_ARGS) |
| tcp->u_nargs = MAX_ARGS; |
| switch(regs.r_eax) { |
| case SYS___syscall: |
| pread(tcp->pfd, &tcp->u_arg, tcp->u_nargs * sizeof(unsigned long), |
| regs.r_esp + sizeof(int) + sizeof(quad_t)); |
| break; |
| case SYS_syscall: |
| pread(tcp->pfd, &tcp->u_arg, tcp->u_nargs * sizeof(unsigned long), |
| regs.r_esp + 2 * sizeof(int)); |
| break; |
| default: |
| pread(tcp->pfd, &tcp->u_arg, tcp->u_nargs * sizeof(unsigned long), |
| regs.r_esp + sizeof(int)); |
| break; |
| } |
| #endif /* FREEBSD */ |
| return 1; |
| } |
| |
| static int |
| trace_syscall_exiting(struct tcb *tcp) |
| { |
| int sys_res; |
| struct timeval tv; |
| int res, scno_good; |
| long u_error; |
| |
| /* Measure the exit time as early as possible to avoid errors. */ |
| if (dtime || cflag) |
| gettimeofday(&tv, NULL); |
| |
| /* BTW, why we don't just memorize syscall no. on entry |
| * in tcp->something? |
| */ |
| scno_good = res = get_scno(tcp); |
| if (res == 0) |
| return res; |
| if (res == 1) |
| res = syscall_fixup(tcp); |
| if (res == 0) |
| return res; |
| if (res == 1) |
| res = get_error(tcp); |
| if (res == 0) |
| return res; |
| if (res == 1) |
| internal_syscall(tcp); |
| |
| if (res == 1 && tcp->scno >= 0 && tcp->scno < nsyscalls && |
| !(qual_flags[tcp->scno] & QUAL_TRACE)) { |
| tcp->flags &= ~TCB_INSYSCALL; |
| return 0; |
| } |
| |
| if (tcp->flags & TCB_REPRINT) { |
| printleader(tcp); |
| tprintf("<... "); |
| if (scno_good != 1) |
| tprintf("????"); |
| else if (tcp->scno >= nsyscalls || tcp->scno < 0) |
| tprintf("syscall_%lu", tcp->scno); |
| else |
| tprintf("%s", sysent[tcp->scno].sys_name); |
| tprintf(" resumed> "); |
| } |
| |
| if (cflag) { |
| struct timeval t = tv; |
| int rc = count_syscall(tcp, &t); |
| if (cflag == CFLAG_ONLY_STATS) |
| { |
| tcp->flags &= ~TCB_INSYSCALL; |
| return rc; |
| } |
| } |
| |
| if (res != 1) { |
| tprintf(") "); |
| tabto(acolumn); |
| tprintf("= ? <unavailable>"); |
| printtrailer(); |
| tcp->flags &= ~TCB_INSYSCALL; |
| return res; |
| } |
| |
| if (tcp->scno >= nsyscalls || tcp->scno < 0 |
| || (qual_flags[tcp->scno] & QUAL_RAW)) |
| sys_res = printargs(tcp); |
| else { |
| if (not_failing_only && tcp->u_error) |
| return 0; /* ignore failed syscalls */ |
| sys_res = (*sysent[tcp->scno].sys_func)(tcp); |
| } |
| |
| u_error = tcp->u_error; |
| tprintf(") "); |
| tabto(acolumn); |
| if (tcp->scno >= nsyscalls || tcp->scno < 0 || |
| qual_flags[tcp->scno] & QUAL_RAW) { |
| if (u_error) |
| tprintf("= -1 (errno %ld)", u_error); |
| else |
| tprintf("= %#lx", tcp->u_rval); |
| } |
| else if (!(sys_res & RVAL_NONE) && u_error) { |
| switch (u_error) { |
| #ifdef LINUX |
| case ERESTARTSYS: |
| tprintf("= ? ERESTARTSYS (To be restarted)"); |
| break; |
| case ERESTARTNOINTR: |
| tprintf("= ? ERESTARTNOINTR (To be restarted)"); |
| break; |
| case ERESTARTNOHAND: |
| tprintf("= ? ERESTARTNOHAND (To be restarted)"); |
| break; |
| case ERESTART_RESTARTBLOCK: |
| tprintf("= ? ERESTART_RESTARTBLOCK (To be restarted)"); |
| break; |
| #endif /* LINUX */ |
| default: |
| tprintf("= -1 "); |
| if (u_error < 0) |
| tprintf("E??? (errno %ld)", u_error); |
| else if (u_error < nerrnos) |
| tprintf("%s (%s)", errnoent[u_error], |
| strerror(u_error)); |
| else |
| tprintf("ERRNO_%ld (%s)", u_error, |
| strerror(u_error)); |
| break; |
| } |
| if ((sys_res & RVAL_STR) && tcp->auxstr) |
| tprintf(" (%s)", tcp->auxstr); |
| } |
| else { |
| if (sys_res & RVAL_NONE) |
| tprintf("= ?"); |
| else { |
| switch (sys_res & RVAL_MASK) { |
| case RVAL_HEX: |
| tprintf("= %#lx", tcp->u_rval); |
| break; |
| case RVAL_OCTAL: |
| tprintf("= %#lo", tcp->u_rval); |
| break; |
| case RVAL_UDECIMAL: |
| tprintf("= %lu", tcp->u_rval); |
| break; |
| case RVAL_DECIMAL: |
| tprintf("= %ld", tcp->u_rval); |
| break; |
| #ifdef HAVE_LONG_LONG |
| case RVAL_LHEX: |
| tprintf("= %#llx", tcp->u_lrval); |
| break; |
| case RVAL_LOCTAL: |
| tprintf("= %#llo", tcp->u_lrval); |
| break; |
| case RVAL_LUDECIMAL: |
| tprintf("= %llu", tcp->u_lrval); |
| break; |
| case RVAL_LDECIMAL: |
| tprintf("= %lld", tcp->u_lrval); |
| break; |
| #endif |
| default: |
| fprintf(stderr, |
| "invalid rval format\n"); |
| break; |
| } |
| } |
| if ((sys_res & RVAL_STR) && tcp->auxstr) |
| tprintf(" (%s)", tcp->auxstr); |
| } |
| if (dtime) { |
| tv_sub(&tv, &tv, &tcp->etime); |
| tprintf(" <%ld.%06ld>", |
| (long) tv.tv_sec, (long) tv.tv_usec); |
| } |
| printtrailer(); |
| |
| dumpio(tcp); |
| if (fflush(tcp->outf) == EOF) |
| return -1; |
| tcp->flags &= ~TCB_INSYSCALL; |
| return 0; |
| } |
| |
| static int |
| trace_syscall_entering(struct tcb *tcp) |
| { |
| int sys_res; |
| int res, scno_good; |
| |
| scno_good = res = get_scno(tcp); |
| if (res == 0) |
| return res; |
| if (res == 1) |
| res = syscall_fixup(tcp); |
| if (res == 0) |
| return res; |
| if (res == 1) |
| res = syscall_enter(tcp); |
| if (res == 0) |
| return res; |
| |
| if (res != 1) { |
| printleader(tcp); |
| tcp->flags &= ~TCB_REPRINT; |
| tcp_last = tcp; |
| if (scno_good != 1) |
| tprintf("????" /* anti-trigraph gap */ "("); |
| else if (tcp->scno >= nsyscalls || tcp->scno < 0) |
| tprintf("syscall_%lu(", tcp->scno); |
| else |
| tprintf("%s(", sysent[tcp->scno].sys_name); |
| /* |
| * " <unavailable>" will be added later by the code which |
| * detects ptrace errors. |
| */ |
| tcp->flags |= TCB_INSYSCALL; |
| return res; |
| } |
| |
| switch (known_scno(tcp)) { |
| #ifdef SYS_socket_subcall |
| case SYS_socketcall: |
| decode_subcall(tcp, SYS_socket_subcall, |
| SYS_socket_nsubcalls, deref_style); |
| break; |
| #endif |
| #ifdef SYS_ipc_subcall |
| case SYS_ipc: |
| decode_subcall(tcp, SYS_ipc_subcall, |
| SYS_ipc_nsubcalls, shift_style); |
| break; |
| #endif |
| #ifdef SVR4 |
| #ifdef SYS_pgrpsys_subcall |
| case SYS_pgrpsys: |
| decode_subcall(tcp, SYS_pgrpsys_subcall, |
| SYS_pgrpsys_nsubcalls, shift_style); |
| break; |
| #endif /* SYS_pgrpsys_subcall */ |
| #ifdef SYS_sigcall_subcall |
| case SYS_sigcall: |
| decode_subcall(tcp, SYS_sigcall_subcall, |
| SYS_sigcall_nsubcalls, mask_style); |
| break; |
| #endif /* SYS_sigcall_subcall */ |
| case SYS_msgsys: |
| decode_subcall(tcp, SYS_msgsys_subcall, |
| SYS_msgsys_nsubcalls, shift_style); |
| break; |
| case SYS_shmsys: |
| decode_subcall(tcp, SYS_shmsys_subcall, |
| SYS_shmsys_nsubcalls, shift_style); |
| break; |
| case SYS_semsys: |
| decode_subcall(tcp, SYS_semsys_subcall, |
| SYS_semsys_nsubcalls, shift_style); |
| break; |
| case SYS_sysfs: |
| decode_subcall(tcp, SYS_sysfs_subcall, |
| SYS_sysfs_nsubcalls, shift_style); |
| break; |
| case SYS_spcall: |
| decode_subcall(tcp, SYS_spcall_subcall, |
| SYS_spcall_nsubcalls, shift_style); |
| break; |
| #ifdef SYS_context_subcall |
| case SYS_context: |
| decode_subcall(tcp, SYS_context_subcall, |
| SYS_context_nsubcalls, shift_style); |
| break; |
| #endif /* SYS_context_subcall */ |
| #ifdef SYS_door_subcall |
| case SYS_door: |
| decode_subcall(tcp, SYS_door_subcall, |
| SYS_door_nsubcalls, door_style); |
| break; |
| #endif /* SYS_door_subcall */ |
| #ifdef SYS_kaio_subcall |
| case SYS_kaio: |
| decode_subcall(tcp, SYS_kaio_subcall, |
| SYS_kaio_nsubcalls, shift_style); |
| break; |
| #endif |
| #endif /* SVR4 */ |
| #ifdef FREEBSD |
| case SYS_msgsys: |
| case SYS_shmsys: |
| case SYS_semsys: |
| decode_subcall(tcp, 0, 0, table_style); |
| break; |
| #endif |
| #ifdef SUNOS4 |
| case SYS_semsys: |
| decode_subcall(tcp, SYS_semsys_subcall, |
| SYS_semsys_nsubcalls, shift_style); |
| break; |
| case SYS_msgsys: |
| decode_subcall(tcp, SYS_msgsys_subcall, |
| SYS_msgsys_nsubcalls, shift_style); |
| break; |
| case SYS_shmsys: |
| decode_subcall(tcp, SYS_shmsys_subcall, |
| SYS_shmsys_nsubcalls, shift_style); |
| break; |
| #endif |
| } |
| |
| internal_syscall(tcp); |
| if (tcp->scno >=0 && tcp->scno < nsyscalls && !(qual_flags[tcp->scno] & QUAL_TRACE)) { |
| tcp->flags |= TCB_INSYSCALL; |
| return 0; |
| } |
| |
| if (cflag == CFLAG_ONLY_STATS) { |
| tcp->flags |= TCB_INSYSCALL; |
| gettimeofday(&tcp->etime, NULL); |
| return 0; |
| } |
| |
| printleader(tcp); |
| tcp->flags &= ~TCB_REPRINT; |
| tcp_last = tcp; |
| if (tcp->scno >= nsyscalls || tcp->scno < 0) |
| tprintf("syscall_%lu(", tcp->scno); |
| else |
| tprintf("%s(", sysent[tcp->scno].sys_name); |
| if (tcp->scno >= nsyscalls || tcp->scno < 0 || |
| ((qual_flags[tcp->scno] & QUAL_RAW) && tcp->scno != SYS_exit)) |
| sys_res = printargs(tcp); |
| else |
| sys_res = (*sysent[tcp->scno].sys_func)(tcp); |
| if (fflush(tcp->outf) == EOF) |
| return -1; |
| tcp->flags |= TCB_INSYSCALL; |
| /* Measure the entrance time as late as possible to avoid errors. */ |
| if (dtime || cflag) |
| gettimeofday(&tcp->etime, NULL); |
| return sys_res; |
| } |
| |
| int |
| trace_syscall(struct tcb *tcp) |
| { |
| return exiting(tcp) ? |
| trace_syscall_exiting(tcp) : trace_syscall_entering(tcp); |
| } |
| |
| int |
| printargs(tcp) |
| struct tcb *tcp; |
| { |
| if (entering(tcp)) { |
| int i; |
| |
| for (i = 0; i < tcp->u_nargs; i++) |
| tprintf("%s%#lx", i ? ", " : "", tcp->u_arg[i]); |
| } |
| return 0; |
| } |
| |
| long |
| getrval2(tcp) |
| struct tcb *tcp; |
| { |
| long val = -1; |
| |
| #ifdef LINUX |
| #if defined (SPARC) || defined (SPARC64) |
| struct pt_regs regs; |
| if (ptrace(PTRACE_GETREGS,tcp->pid,(char *)®s,0) < 0) |
| return -1; |
| val = regs.u_regs[U_REG_O1]; |
| #elif defined(SH) |
| if (upeek(tcp, 4*(REG_REG0+1), &val) < 0) |
| return -1; |
| #elif defined(IA64) |
| if (upeek(tcp, PT_R9, &val) < 0) |
| return -1; |
| #endif |
| #endif /* LINUX */ |
| |
| #ifdef SUNOS4 |
| if (upeek(tcp, uoff(u_rval2), &val) < 0) |
| return -1; |
| #endif /* SUNOS4 */ |
| |
| #ifdef SVR4 |
| #ifdef SPARC |
| val = tcp->status.PR_REG[R_O1]; |
| #endif /* SPARC */ |
| #ifdef I386 |
| val = tcp->status.PR_REG[EDX]; |
| #endif /* I386 */ |
| #ifdef X86_64 |
| val = tcp->status.PR_REG[RDX]; |
| #endif /* X86_64 */ |
| #ifdef MIPS |
| val = tcp->status.PR_REG[CTX_V1]; |
| #endif /* MIPS */ |
| #endif /* SVR4 */ |
| |
| #ifdef FREEBSD |
| struct reg regs; |
| pread(tcp->pfd_reg, ®s, sizeof(regs), 0); |
| val = regs.r_edx; |
| #endif |
| return val; |
| } |
| |
| #ifdef SUNOS4 |
| /* |
| * Apparently, indirect system calls have already be converted by ptrace(2), |
| * so if you see "indir" this program has gone astray. |
| */ |
| int |
| sys_indir(tcp) |
| struct tcb *tcp; |
| { |
| int i, scno, nargs; |
| |
| if (entering(tcp)) { |
| if ((scno = tcp->u_arg[0]) > nsyscalls) { |
| fprintf(stderr, "Bogus syscall: %u\n", scno); |
| return 0; |
| } |
| nargs = sysent[scno].nargs; |
| tprintf("%s", sysent[scno].sys_name); |
| for (i = 0; i < nargs; i++) |
| tprintf(", %#lx", tcp->u_arg[i+1]); |
| } |
| return 0; |
| } |
| #endif /* SUNOS4 */ |
| |
| int |
| is_restart_error(struct tcb *tcp) |
| { |
| #ifdef LINUX |
| if (!syserror(tcp)) |
| return 0; |
| switch (tcp->u_error) { |
| case ERESTARTSYS: |
| case ERESTARTNOINTR: |
| case ERESTARTNOHAND: |
| case ERESTART_RESTARTBLOCK: |
| return 1; |
| default: |
| break; |
| } |
| #endif /* LINUX */ |
| return 0; |
| } |