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Diffstat (limited to 'syscall.c')
-rw-r--r-- | syscall.c | 1431 |
1 files changed, 1431 insertions, 0 deletions
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"); +} |