Initial revision
diff --git a/syscall.c b/syscall.c
new file mode 100644
index 0000000..91bdd8b
--- /dev/null
+++ b/syscall.c
@@ -0,0 +1,1431 @@
+/*
+ * 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>
+ * 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>
+#if __GLIBC__ == 2 && __GLIBC_MINOR__ >= 1
+# include <sys/reg.h>
+#endif
+
+#ifdef LINUX
+#include <linux/ptrace.h>
+#endif /* LINUX */
+
+#ifndef SYS_ERRLIST_DECLARED
+extern int sys_nerr;
+extern char *sys_errlist[];
+#endif /* SYS_ERRLIST_DECLARED */
+
+#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 NSIG
+#define NSIG 32
+#endif
+#ifdef ARM
+#undef NSIG
+#define NSIG 32
+#endif
+#endif /* LINUX */
+
+#include "syscall.h"
+
+/* Define these shorthand notations to simplify the syscallent files. */
+#define TF TRACE_FILE
+#define TI TRACE_IPC
+#define TN TRACE_NETWORK
+#define TP TRACE_PROCESS
+#define TS TRACE_SIGNAL
+
+struct sysent sysent0[] = {
+#include "syscallent.h"
+};
+int nsyscalls0 = sizeof sysent0 / sizeof sysent0[0];
+
+#if SUPPORTED_PERSONALITIES >= 2
+struct sysent sysent1[] = {
+#include "syscallent1.h"
+};
+int nsyscalls1 = sizeof sysent1 / sizeof sysent1[0];
+#endif /* SUPPORTED_PERSONALITIES >= 2 */
+
+#if SUPPORTED_PERSONALITIES >= 3
+struct sysent sysent2[] = {
+#include "syscallent2.h"
+};
+int nsyscalls2 = sizeof sysent2 / sizeof sysent2[0];
+#endif /* SUPPORTED_PERSONALITIES >= 3 */
+
+struct sysent *sysent;
+int nsyscalls;
+
+/* Now undef them since short defines cause wicked namespace pollution. */
+#undef TF
+#undef TI
+#undef TN
+#undef TP
+#undef TS
+
+char *errnoent0[] = {
+#include "errnoent.h"
+};
+int nerrnos0 = sizeof errnoent0 / sizeof errnoent0[0];
+
+#if SUPPORTED_PERSONALITIES >= 2
+char *errnoent1[] = {
+#include "errnoent1.h"
+};
+int nerrnos1 = sizeof errnoent1 / sizeof errnoent1[0];
+#endif /* SUPPORTED_PERSONALITIES >= 2 */
+
+#if SUPPORTED_PERSONALITIES >= 3
+char *errnoent2[] = {
+#include "errnoent2.h"
+};
+int nerrnos2 = sizeof errnoent2 / sizeof errnoent2[0];
+#endif /* SUPPORTED_PERSONALITIES >= 3 */
+
+char **errnoent;
+int nerrnos;
+
+int current_personality;
+
+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;
+ break;
+
+#if SUPPORTED_PERSONALITIES >= 2
+ case 1:
+ errnoent = errnoent1;
+ nerrnos = nerrnos1;
+ sysent = sysent1;
+ nsyscalls = nsyscalls1;
+ ioctlent = ioctlent1;
+ nioctlents = nioctlents1;
+ signalent = signalent1;
+ nsignals = nsignals1;
+ 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;
+ break;
+#endif /* SUPPORTED_PERSONALITIES >= 3 */
+
+ default:
+ return -1;
+ }
+
+ current_personality = personality;
+ return 0;
+}
+
+int qual_flags[MAX_QUALS];
+
+static int call_count[MAX_QUALS];
+static int error_count[MAX_QUALS];
+static struct timeval tv_count[MAX_QUALS];
+static int sorted_count[MAX_QUALS];
+
+static struct timeval shortest = { 1000000, 0 };
+
+static int lookup_syscall(), lookup_signal(), lookup_fault(), lookup_desc();
+
+static struct qual_options {
+ int bitflag;
+ char *option_name;
+ int (*lookup)();
+ char *argument_name;
+} qual_options[] = {
+ { QUAL_TRACE, "trace", lookup_syscall, "system call" },
+ { QUAL_TRACE, "t", lookup_syscall, "system call" },
+ { QUAL_ABBREV, "abbrev", lookup_syscall, "system call" },
+ { QUAL_ABBREV, "a", lookup_syscall, "system call" },
+ { QUAL_VERBOSE, "verbose", lookup_syscall, "system call" },
+ { QUAL_VERBOSE, "v", lookup_syscall, "system call" },
+ { QUAL_RAW, "raw", lookup_syscall, "system call" },
+ { QUAL_RAW, "x", lookup_syscall, "system call" },
+ { QUAL_SIGNAL, "signal", lookup_signal, "signal" },
+ { QUAL_SIGNAL, "signals", lookup_signal, "signal" },
+ { QUAL_SIGNAL, "s", lookup_signal, "signal" },
+ { QUAL_FAULT, "fault", lookup_fault, "fault" },
+ { QUAL_FAULT, "faults", lookup_fault, "fault" },
+ { QUAL_FAULT, "m", lookup_fault, "fault" },
+ { QUAL_READ, "read", lookup_desc, "descriptor" },
+ { QUAL_READ, "reads", lookup_desc, "descriptor" },
+ { QUAL_READ, "r", lookup_desc, "descriptor" },
+ { QUAL_WRITE, "write", lookup_desc, "descriptor" },
+ { QUAL_WRITE, "writes", lookup_desc, "descriptor" },
+ { QUAL_WRITE, "w", lookup_desc, "descriptor" },
+ { 0, NULL, NULL, NULL },
+};
+
+static int
+lookup_syscall(s)
+char *s;
+{
+ int i;
+
+ for (i = 0; i < nsyscalls; i++) {
+ if (strcmp(s, sysent[i].sys_name) == 0)
+ return i;
+ }
+ return -1;
+}
+
+static int
+lookup_signal(s)
+char *s;
+{
+ int i;
+ char buf[32];
+
+ if (s && *s && isdigit(*s))
+ return atoi(s);
+ strcpy(buf, s);
+ s = buf;
+ for (i = 0; s[i]; i++)
+ s[i] = toupper(s[i]);
+ if (strncmp(s, "SIG", 3) == 0)
+ s += 3;
+ for (i = 0; i <= NSIG; i++) {
+ if (strcmp(s, signalent[i] + 3) == 0)
+ return i;
+ }
+ return -1;
+}
+
+static int
+lookup_fault(s)
+char *s;
+{
+ return -1;
+}
+
+static int
+lookup_desc(s)
+char *s;
+{
+ if (s && *s && isdigit(*s))
+ return atoi(s);
+ return -1;
+}
+
+static int
+lookup_class(s)
+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;
+ return -1;
+}
+
+void
+qualify(s)
+char *s;
+{
+ struct qual_options *opt;
+ int not;
+ 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++) {
+ if (not)
+ qual_flags[i] &= ~opt->bitflag;
+ else
+ qual_flags[i] |= opt->bitflag;
+ }
+ return;
+ }
+ for (i = 0; i < MAX_QUALS; i++) {
+ if (not)
+ qual_flags[i] |= opt->bitflag;
+ else
+ qual_flags[i] &= ~opt->bitflag;
+ }
+ for (p = strtok(s, ","); p; p = strtok(NULL, ",")) {
+ if (opt->bitflag == QUAL_TRACE && (n = lookup_class(p)) > 0) {
+ for (i = 0; i < MAX_QUALS; i++) {
+ if (sysent[i].sys_flags & n) {
+ if (not)
+ qual_flags[i] &= ~opt->bitflag;
+ else
+ qual_flags[i] |= opt->bitflag;
+ }
+ }
+ continue;
+ }
+ if ((n = (*opt->lookup)(p)) < 0) {
+ fprintf(stderr, "strace: invalid %s `%s'\n",
+ opt->argument_name, p);
+ exit(1);
+ }
+ if (not)
+ qual_flags[n] &= ~opt->bitflag;
+ else
+ qual_flags[n] |= opt->bitflag;
+ }
+ return;
+}
+
+static void
+dumpio(tcp)
+struct tcb *tcp;
+{
+ if (syserror(tcp))
+ return;
+ if (tcp->u_arg[0] < 0 || tcp->u_arg[0] >= MAX_QUALS)
+ return;
+#ifdef __arm__
+ switch (tcp->scno + __NR_SYSCALL_BASE) {
+#else
+ switch (tcp->scno) {
+#endif
+ case SYS_read:
+#ifdef SYS_recv
+ case SYS_recv:
+#endif
+#ifdef SYS_recvfrom
+ case SYS_recvfrom:
+#endif
+ if (qual_flags[tcp->u_arg[0]] & QUAL_READ)
+ dumpstr(tcp, tcp->u_arg[1], tcp->u_rval);
+ break;
+ case SYS_write:
+#ifdef SYS_send
+ case SYS_send:
+#endif
+#ifdef SYS_sendto
+ case SYS_sendto:
+#endif
+ if (qual_flags[tcp->u_arg[0]] & QUAL_WRITE)
+ dumpstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
+ break;
+ }
+}
+
+enum subcall_style { shift_style, deref_style, mask_style };
+
+#if !(defined(LINUX) && defined(ALPHA))
+
+const int socket_map [] = {
+ /* SYS_SOCKET */ 97,
+ /* SYS_BIND */ 104,
+ /* SYS_CONNECT */ 98,
+ /* SYS_LISTEN */ 106,
+ /* SYS_ACCEPT */ 99,
+ /* SYS_GETSOCKNAME */ 150,
+ /* SYS_GETPEERNAME */ 141,
+ /* SYS_SOCKETPAIR */ 135,
+ /* SYS_SEND */ 101,
+ /* SYS_RECV */ 102,
+ /* SYS_SENDTO */ 133,
+ /* SYS_RECVFROM */ 125,
+ /* SYS_SHUTDOWN */ 134,
+ /* SYS_SETSOCKOPT */ 105,
+ /* SYS_GETSOCKOPT */ 118,
+ /* SYS_SENDMSG */ 114,
+ /* SYS_RECVMSG */ 113
+};
+
+void
+sparc_socket_decode (struct tcb *tcp)
+{
+ volatile long addr;
+ volatile int i, n;
+
+ if (tcp->u_arg [0] < 1 || tcp->u_arg [0] > sizeof(socket_map)/sizeof(int)+1){
+ return;
+ }
+ tcp->scno = socket_map [tcp->u_arg [0]-1];
+ n = tcp->u_nargs = sysent [tcp->scno].nargs;
+ addr = tcp->u_arg [1];
+ for (i = 0; i < n; i++){
+ int arg;
+ if (umoven (tcp, addr, sizeof (arg), (void *) &arg) < 0)
+ arg = 0;
+ tcp->u_arg [i] = arg;
+ addr += sizeof (arg);
+ }
+}
+
+static void
+decode_subcall(tcp, subcall, nsubcalls, style)
+struct tcb *tcp;
+int subcall;
+int nsubcalls;
+enum subcall_style style;
+{
+ int i, addr, mask, arg;
+
+ if (tcp->u_arg[0] < 0 || tcp->u_arg[0] >= nsubcalls)
+ return;
+ switch (style) {
+ case shift_style:
+ 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:
+ tcp->scno = subcall + tcp->u_arg[0];
+ addr = tcp->u_arg[1];
+ for (i = 0; i < sysent[tcp->scno].nargs; i++) {
+ if (umove(tcp, addr, &arg) < 0)
+ arg = 0;
+ tcp->u_arg[i] = arg;
+ addr += sizeof(arg);
+ }
+ tcp->u_nargs = sysent[tcp->scno].nargs;
+ break;
+ case mask_style:
+ mask = (tcp->u_arg[0] >> 8) & 0xff;
+ tcp->u_arg[0] &= 0xff;
+ for (i = 0; mask; i++)
+ mask >>= 1;
+ tcp->scno = subcall + i;
+ if (sysent[tcp->scno].nargs != -1)
+ tcp->u_nargs = sysent[tcp->scno].nargs;
+ break;
+ }
+}
+#endif
+
+struct tcb *tcp_last = NULL;
+
+static int
+internal_syscall(tcp)
+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.
+ */
+#ifdef __arm__
+ switch (tcp->scno + __NR_SYSCALL_BASE) {
+#else
+ switch (tcp->scno) {
+#endif
+#ifdef SYS_fork
+ case SYS_fork:
+#endif
+#ifdef SYS_vfork
+ case SYS_vfork:
+#endif
+#ifdef SYS_clone
+ case SYS_clone:
+#endif
+ internal_fork(tcp);
+ break;
+
+#ifdef SYS_execv
+ case SYS_execv:
+#endif
+#ifdef SYS_execve
+ case SYS_execve:
+#endif
+ internal_exec(tcp);
+ break;
+
+#ifdef SYS_wait
+ case SYS_wait:
+#endif
+#ifdef SYS_wait4
+ case SYS_wait4:
+#endif
+#ifdef SYS_waitpid
+ case SYS_waitpid:
+#endif
+#ifdef SYS_waitsys
+ case SYS_waitsys:
+#endif
+ internal_wait(tcp);
+ break;
+
+#ifdef SYS_exit
+ case SYS_exit:
+#endif
+ internal_exit(tcp);
+ break;
+ }
+ return 0;
+}
+
+int
+trace_syscall(tcp)
+struct tcb *tcp;
+{
+ int sys_res;
+ struct timeval tv;
+ long scno = 0;
+#ifdef LINUX
+#if defined (I386)
+ long eax;
+#elif defined (POWERPC)
+ long result,flags;
+#elif defined (M68K)
+ int d0;
+#elif defined (ARM)
+ int r0;
+#elif defined (ALPHA)
+ long r0;
+ long a3;
+#elif defined (SPARC)
+ struct pt_regs regs;
+ unsigned long trap;
+#endif
+#endif /* LINUX */
+
+#ifndef SVR4
+ int pid = tcp->pid;
+#endif /* !SVR4 */
+
+ /* Measure the exit time as early as possible to avoid errors. */
+ if (dtime && (tcp->flags & TCB_INSYSCALL))
+ gettimeofday(&tv, NULL);
+#ifdef LINUX
+#if defined (POWERPC)
+ if (upeek(pid, 4*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;
+ }
+ }
+#elif defined (I386)
+ if (upeek(pid, 4*ORIG_EAX, &scno) < 0)
+ return -1;
+#elif defined (ARM)
+ {
+ long pc;
+ upeek(pid, 4*15, &pc);
+ umoven(tcp, pc-4, 4, (char *)&scno);
+ scno &= 0x000fffff;
+ }
+#elif defined (M68K)
+ if (upeek(pid, 4*PT_ORIG_D0, &scno) < 0)
+ return -1;
+#elif defined (ALPHA)
+ if (upeek(pid, REG_A3, &a3) < 0)
+ return -1;
+
+ if (!(tcp->flags & TCB_INSYSCALL)) {
+ if (upeek(pid, 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(pid, REG_R0, &r0) < 0)
+ return -1;
+ }
+#elif defined (SPARC)
+ /* Everything we need is in the current register set. */
+ if (ptrace(PTRACE_GETREGS,pid,(char *)®s,0) < 0)
+ return -1;
+
+ memmove (®s.u_regs [1], ®s.u_regs [0],
+ sizeof (regs.u_regs) - sizeof (regs.u_regs [0]));
+
+ /* If we are entering, then disassemble the syscall trap. */
+ if (!(tcp->flags & TCB_INSYSCALL)) {
+ /* Retrieve the syscall trap instruction. */
+ errno = 0;
+ trap = ptrace(PTRACE_PEEKTEXT,pid,(char *)regs.pc,0);
+ 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 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;
+ }
+ fprintf(stderr,"syscall: unknown syscall trap %08x %08x\n", trap, regs.pc);
+ return -1;
+ }
+
+ /* Extract the system call number from the registers. */
+ if (trap == 0x91d02027)
+ scno = 156;
+ else
+ scno = regs.u_regs[UREG_G1];
+ if (scno == 0) {
+ scno = regs.u_regs[UREG_I0];
+ memmove (®s.u_regs[UREG_I0], ®s.u_regs[UREG_I1], 7*sizeof(regs.u_regs[0]));
+ }
+ }
+#endif
+#endif /* LINUX */
+#ifdef SUNOS4
+ if (upeek(pid, uoff(u_arg[7]), &scno) < 0)
+ return -1;
+#endif
+#ifdef SVR4
+#ifdef HAVE_PR_SYSCALL
+ scno = tcp->status.pr_syscall;
+#else /* !HAVE_PR_SYSCALL */
+ scno = tcp->status.pr_what;
+#endif /* !HAVE_PR_SYSCALL */
+ 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 */
+ ) {
+ /* 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 /* SVR4 */
+#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(pid, 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 (POWERPC)
+# define SO_MASK 0x10000000
+ if (upeek(pid, 4*PT_CCR, &flags) < 0)
+ return -1;
+ if (upeek(pid, 4*PT_R3, &result) < 0)
+ return -1;
+ if (flags & SO_MASK)
+ result = -result;
+#elif defined (M68K)
+ if (upeek(pid, 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)
+ if (upeek(pid, 4*0, (long *)&r0) < 0)
+ return -1;
+ if ( 0 && r0 != -ENOSYS && !(tcp->flags & TCB_INSYSCALL)) {
+ if (debug)
+ fprintf(stderr, "stray syscall exit: d0 = %ld\n", r0);
+ return 0;
+ }
+#else
+#endif
+#endif /* LINUX */
+
+ if (tcp->flags & TCB_INSYSCALL) {
+ long u_error;
+
+#ifdef LINUX
+#ifdef I386
+ if (eax < 0 && -eax < nerrnos) {
+ tcp->u_rval = -1;
+ u_error = -eax;
+ }
+ else {
+ tcp->u_rval = eax;
+ u_error = 0;
+ }
+#else /* !I386 */
+#ifdef POWERPC
+ if (result && (unsigned) -result < nerrnos) {
+ tcp->u_rval = -1;
+ u_error = -result;
+ }
+ else {
+ tcp->u_rval = result;
+ u_error = 0;
+ }
+#else /* !POWERPC */
+#ifdef M68K
+ if (d0 && (unsigned) -d0 < nerrnos) {
+ tcp->u_rval = -1;
+ u_error = -d0;
+ }
+ else {
+ tcp->u_rval = d0;
+ u_error = 0;
+ }
+#else /* !M68K */
+#ifdef ARM
+ if (r0 && (unsigned) -r0 < nerrnos) {
+ tcp->u_rval = -1;
+ u_error = -r0;
+ }
+ else {
+ tcp->u_rval = r0;
+ u_error = 0;
+ }
+#else /* !ARM */
+#ifdef ALPHA
+ if (a3) {
+ tcp->u_rval = -1;
+ u_error = r0;
+ }
+ else {
+ tcp->u_rval = r0;
+ u_error = 0;
+ }
+#else /* !ALPHA */
+#ifdef SPARC
+ if (regs.psr & PSR_C) {
+ tcp->u_rval = -1;
+ u_error = regs.u_regs[UREG_I0];
+ }
+ else {
+ tcp->u_rval = regs.u_regs[UREG_I0];
+ u_error = 0;
+ }
+#endif /* SPARC */
+#endif /* ALPHA */
+#endif /* ARM */
+#endif /* M68K */
+#endif /* POWERPC */
+#endif /* I386 */
+#endif /* LINUX */
+#ifdef SUNOS4
+ /* get error code from user struct */
+ if (upeek(pid, uoff(u_error), &u_error) < 0)
+ return -1;
+ u_error >>= 24; /* u_error is a char */
+
+ /* get system call return value */
+ if (upeek(pid, 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];
+ u_error = 0;
+ }
+#endif /* I386 */
+#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 */
+ tcp->u_error = u_error;
+
+ internal_syscall(tcp);
+ if (!(qual_flags[tcp->scno] & QUAL_TRACE)) {
+ tcp->flags &= ~TCB_INSYSCALL;
+ return 0;
+ }
+
+ if (tcp->flags & TCB_REPRINT) {
+ printleader(tcp);
+ tprintf("<... ");
+ if (tcp->scno >= nsyscalls)
+ tprintf("syscall_%lu", tcp->scno);
+ else
+ tprintf("%s", sysent[tcp->scno].sys_name);
+ tprintf(" resumed> ");
+ }
+
+ if (cflag) {
+ call_count[tcp->scno]++;
+ if (u_error)
+ error_count[tcp->scno]++;
+ tv_sub(&tv, &tv, &tcp->etime);
+#ifdef LINUX
+ if (tv_cmp(&tv, &tcp->dtime) > 0) {
+ static struct timeval one_tick =
+ { 0, 1000000 / HZ };
+
+ if (tv_nz(&tcp->dtime))
+ tv = tcp->dtime;
+ else if (tv_cmp(&tv, &one_tick) > 0) {
+ if (tv_cmp(&shortest, &one_tick) < 0)
+ tv = shortest;
+ else
+ tv = one_tick;
+ }
+ }
+#endif /* LINUX */
+ if (tv_cmp(&tv, &shortest) < 0)
+ shortest = tv;
+ tv_add(&tv_count[tcp->scno],
+ &tv_count[tcp->scno], &tv);
+ tcp->flags &= ~TCB_INSYSCALL;
+ return 0;
+ }
+
+ if (tcp->scno >= nsyscalls
+ || (qual_flags[tcp->scno] & QUAL_RAW))
+ sys_res = printargs(tcp);
+ else
+ sys_res = (*sysent[tcp->scno].sys_func)(tcp);
+ u_error = tcp->u_error;
+ tprintf(") ");
+ tabto(acolumn);
+ if (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) {
+#ifdef LINUX
+ switch (u_error) {
+ case ERESTARTSYS:
+ tprintf("= ? ERESTARTSYS (To be restarted)");
+ break;
+ case ERESTARTNOINTR:
+ tprintf("= ? ERESTARTNOINTR (To be restarted)");
+ break;
+ case ERESTARTNOHAND:
+ tprintf("= ? ERESTARTNOHAND (To be restarted)");
+ break;
+ default:
+#endif /* LINUX */
+ tprintf("= -1 ");
+ if (u_error < nerrnos && u_error < sys_nerr)
+ tprintf("%s (%s)", errnoent[u_error],
+ sys_errlist[u_error]);
+ else if (u_error < nerrnos)
+ tprintf("%s (errno %ld)",
+ errnoent[u_error], u_error);
+ else if (u_error < sys_nerr)
+ tprintf("ERRNO_%ld (%s)", u_error,
+ sys_errlist[u_error]);
+ else
+ tprintf("E??? (errno %ld)", u_error);
+#ifdef LINUX
+ break;
+ }
+#endif /* LINUX */
+ }
+ 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;
+ 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(tcp);
+
+ dumpio(tcp);
+ if (fflush(tcp->outf) == EOF)
+ return -1;
+ tcp->flags &= ~TCB_INSYSCALL;
+ return 0;
+ }
+
+ /* Entering system call */
+ tcp->scno = scno;
+#ifdef LINUX
+#if defined (ALPHA)
+ {
+ int i;
+ tcp->u_nargs = sysent[tcp->scno].nargs;
+ for (i = 0; i < tcp->u_nargs; i++) {
+ if (upeek(pid, REG_A0+i, &tcp->u_arg[i]) < 0)
+ return -1;
+ }
+ }
+#elif defined (POWERPC)
+ {
+ int i;
+ tcp->u_nargs = sysent[tcp->scno].nargs;
+ for (i = 0; i < tcp->u_nargs; i++) {
+ if (upeek(pid, (i==0) ? (4*PT_ORIG_R3) : ((i+PT_R3)*4), &tcp->u_arg[i]) < 0)
+ return -1;
+ }
+ }
+#elif defined (SPARC)
+ {
+ int i, offset;
+
+ offset = UREG_I0;
+ tcp->u_nargs = sysent[tcp->scno].nargs;
+ for (i = 0; i < tcp->u_nargs; i++)
+ tcp->u_arg[i] = regs.u_regs[offset + i];
+ }
+#else
+ {
+ int i;
+ tcp->u_nargs = sysent[tcp->scno].nargs;
+ for (i = 0; i < tcp->u_nargs; i++) {
+ if (upeek(pid, i*4, &tcp->u_arg[i]) < 0)
+ return -1;
+ }
+ }
+#endif
+#endif /* LINUX */
+#ifdef SUNOS4
+ {
+ int i;
+ tcp->u_nargs = sysent[tcp->scno].nargs;
+ for (i = 0; i < tcp->u_nargs; i++) {
+ struct user *u;
+
+ if (upeek(pid, 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 (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]));
+ }
+#else /* !MIPS */
+#ifdef HAVE_PR_SYSCALL
+ if (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];
+ }
+#else /* !HAVE_PR_SYSCALL */
+#ifdef I386
+ if (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);
+#endif /* I386 */
+#endif /* !HAVE_PR_SYSCALL */
+#endif /* !MIPS */
+#endif /* SVR4 */
+#ifdef __arm__
+ switch (tcp->scno + __NR_SYSCALL_BASE) {
+#else
+ switch (tcp->scno) {
+#endif
+#ifdef LINUX
+#if !defined (ALPHA) && !defined(SPARC)
+ case SYS_socketcall:
+ decode_subcall(tcp, SYS_socket_subcall,
+ SYS_socket_nsubcalls, deref_style);
+ break;
+ case SYS_ipc:
+ decode_subcall(tcp, SYS_ipc_subcall,
+ SYS_ipc_nsubcalls, shift_style);
+ break;
+#endif /* !ALPHA && !SPARC */
+#ifdef SPARC
+ case SYS_socketcall:
+ sparc_socket_decode (tcp);
+ break;
+#endif
+#endif /* LINUX */
+#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;
+#if 0 /* broken */
+ case SYS_utssys:
+ decode_subcall(tcp, SYS_utssys_subcall,
+ SYS_utssys_nsubcalls, shift_style);
+ break;
+#endif
+ 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 */
+#endif /* SVR4 */
+#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 (!(qual_flags[tcp->scno] & QUAL_TRACE)) {
+ tcp->flags |= TCB_INSYSCALL;
+ return 0;
+ }
+
+ if (cflag) {
+ gettimeofday(&tcp->etime, NULL);
+ tcp->flags |= TCB_INSYSCALL;
+ return 0;
+ }
+
+ printleader(tcp);
+ tcp->flags &= ~TCB_REPRINT;
+ tcp_last = tcp;
+ if (tcp->scno >= nsyscalls)
+ tprintf("syscall_%lu(", tcp->scno);
+ else
+ tprintf("%s(", sysent[tcp->scno].sys_name);
+ if (tcp->scno >= nsyscalls ||
+ ((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)
+ gettimeofday(&tcp->etime, NULL);
+ return sys_res;
+}
+
+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
+#ifdef SPARC
+ struct pt_regs regs;
+ if (ptrace(PTRACE_GETREGS,tcp->pid,(char *)®s,0) < 0)
+ return -1;
+ val = regs.u_regs[UREG_I1];
+#endif /* SPARC */
+#endif /* LINUX */
+
+#ifdef SUNOS4
+ if (upeek(tcp->pid, 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 MIPS
+ val = tcp->status.pr_reg[CTX_V1];
+#endif /* MIPS */
+#endif /* SVR4 */
+
+ return val;
+}
+
+/*
+ * 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;
+}
+
+static int
+time_cmp(a, b)
+void *a;
+void *b;
+{
+ return -tv_cmp(&tv_count[*((int *) a)], &tv_count[*((int *) b)]);
+}
+
+static int
+syscall_cmp(a, b)
+void *a;
+void *b;
+{
+ return strcmp(sysent[*((int *) a)].sys_name,
+ sysent[*((int *) b)].sys_name);
+}
+
+static int
+count_cmp(a, b)
+void *a;
+void *b;
+{
+ int m = call_count[*((int *) a)], n = call_count[*((int *) b)];
+
+ return (m < n) ? 1 : (m > n) ? -1 : 0;
+}
+
+static int (*sortfun)();
+static struct timeval overhead = { -1, -1 };
+
+void
+set_sortby(sortby)
+char *sortby;
+{
+ if (strcmp(sortby, "time") == 0)
+ sortfun = time_cmp;
+ else if (strcmp(sortby, "calls") == 0)
+ sortfun = count_cmp;
+ else if (strcmp(sortby, "name") == 0)
+ sortfun = syscall_cmp;
+ else if (strcmp(sortby, "nothing") == 0)
+ sortfun = NULL;
+ else {
+ fprintf(stderr, "invalid sortby: `%s'\n", sortby);
+ exit(1);
+ }
+}
+
+void set_overhead(n)
+int n;
+{
+ overhead.tv_sec = n / 1000000;
+ overhead.tv_usec = n % 1000000;
+}
+
+void
+call_summary(outf)
+FILE *outf;
+{
+ int i, j;
+ int call_cum, error_cum;
+ struct timeval tv_cum, dtv;
+ double percent;
+ char *dashes = "-------------------------";
+ char error_str[16];
+
+ call_cum = error_cum = tv_cum.tv_sec = tv_cum.tv_usec = 0;
+ if (overhead.tv_sec == -1) {
+ tv_mul(&overhead, &shortest, 8);
+ tv_div(&overhead, &overhead, 10);
+ }
+ for (i = 0; i < nsyscalls; i++) {
+ sorted_count[i] = i;
+ if (call_count[i] == 0)
+ continue;
+ tv_mul(&dtv, &overhead, call_count[i]);
+ tv_sub(&tv_count[i], &tv_count[i], &dtv);
+ call_cum += call_count[i];
+ error_cum += error_count[i];
+ tv_add(&tv_cum, &tv_cum, &tv_count[i]);
+ }
+ if (sortfun)
+ qsort((void *) sorted_count, nsyscalls, sizeof(int), sortfun);
+ fprintf(outf, "%6.6s %11.11s %11.11s %9.9s %9.9s %s\n",
+ "% time", "seconds", "usecs/call",
+ "calls", "errors", "syscall");
+ fprintf(outf, "%6.6s %11.11s %11.11s %9.9s %9.9s %-16.16s\n",
+ dashes, dashes, dashes, dashes, dashes, dashes);
+ for (i = 0; i < nsyscalls; i++) {
+ j = sorted_count[i];
+ if (call_count[j] == 0)
+ continue;
+ tv_div(&dtv, &tv_count[j], call_count[j]);
+ if (error_count[j])
+ sprintf(error_str, "%d", error_count[j]);
+ else
+ error_str[0] = '\0';
+ percent = 100.0*tv_float(&tv_count[j])/tv_float(&tv_cum);
+ fprintf(outf, "%6.2f %4ld.%06ld %11ld %9d %9.9s %s\n",
+ percent, (long) tv_count[j].tv_sec,
+ (long) tv_count[j].tv_usec,
+ (long) 1000000 * dtv.tv_sec + dtv.tv_usec,
+ call_count[j], error_str, sysent[j].sys_name);
+ }
+ fprintf(outf, "%6.6s %11.11s %11.11s %9.9s %9.9s %-16.16s\n",
+ dashes, dashes, dashes, dashes, dashes, dashes);
+ if (error_cum)
+ sprintf(error_str, "%d", error_cum);
+ else
+ error_str[0] = '\0';
+ fprintf(outf, "%6.6s %4ld.%06ld %11.11s %9d %9.9s %s\n",
+ "100.00", (long) tv_cum.tv_sec, (long) tv_cum.tv_usec, "",
+ call_cum, error_str, "total");
+}