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strace/signal.c

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/*
* 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 <sys/user.h>
#include <fcntl.h>
#ifdef SVR4
#include <sys/ucontext.h>
#endif /* SVR4 */
#if defined(linux) && !defined(__GLIBC__)
#include <linux/ptrace.h>
#endif
#ifdef HAVE_SYS_REG_H
# include <sys/reg.h>
# define PTRACE_PEEKUSR PTRACE_PEEKUSER
# define PTRACE_POKEUSR PTRACE_POKEUSER
#endif
#ifdef LINUX
#ifdef HAVE_ASM_SIGCONTEXT_H
#include <asm/sigcontext.h>
#ifdef SPARC
#include <asm/reg.h>
typedef struct {
struct regs si_regs;
int si_mask;
} m_siginfo_t;
#endif
#else /* !HAVE_ASM_SIGCONTEXT_H */
#ifdef I386
struct sigcontext_struct {
unsigned short gs, __gsh;
unsigned short fs, __fsh;
unsigned short es, __esh;
unsigned short ds, __dsh;
unsigned long edi;
unsigned long esi;
unsigned long ebp;
unsigned long esp;
unsigned long ebx;
unsigned long edx;
unsigned long ecx;
unsigned long eax;
unsigned long trapno;
unsigned long err;
unsigned long eip;
unsigned short cs, __csh;
unsigned long eflags;
unsigned long esp_at_signal;
unsigned short ss, __ssh;
unsigned long i387;
unsigned long oldmask;
unsigned long cr2;
};
#else /* !I386 */
#ifdef M68K
struct sigcontext
{
unsigned long sc_mask;
unsigned long sc_usp;
unsigned long sc_d0;
unsigned long sc_d1;
unsigned long sc_a0;
unsigned long sc_a1;
unsigned short sc_sr;
unsigned long sc_pc;
unsigned short sc_formatvec;
};
#endif /* M68K */
#endif /* !I386 */
#endif /* !HAVE_ASM_SIGCONTEXT_H */
#ifndef NSIG
#define NSIG 32
#endif
#ifdef ARM
#undef NSIG
#define NSIG 32
#endif
#endif /* LINUX */
char *signalent0[] = {
#include "signalent.h"
};
int nsignals0 = sizeof signalent0 / sizeof signalent0[0];
#if SUPPORTED_PERSONALITIES >= 2
char *signalent1[] = {
#include "signalent1.h"
};
int nsignals1 = sizeof signalent1 / sizeof signalent1[0];
#endif /* SUPPORTED_PERSONALITIES >= 2 */
#if SUPPORTED_PERSONALITIES >= 3
char *signalent2[] = {
#include "signalent2.h"
};
int nsignals2 = sizeof signalent2 / sizeof signalent2[0];
#endif /* SUPPORTED_PERSONALITIES >= 3 */
char **signalent;
int nsignals;
#ifdef SUNOS4
static struct xlat sigvec_flags[] = {
{ SV_ONSTACK, "SV_ONSTACK" },
{ SV_INTERRUPT, "SV_INTERRUPT" },
{ SV_RESETHAND, "SV_RESETHAND" },
{ SA_NOCLDSTOP, "SA_NOCLDSTOP" },
{ 0, NULL },
};
#endif /* SUNOS4 */
#ifdef HAVE_SIGACTION
static struct xlat sigact_flags[] = {
#ifdef SA_STACK
{ SA_STACK, "SA_STACK" },
#endif
#ifdef SA_RESTART
{ SA_RESTART, "SA_RESTART" },
#endif
#ifdef SA_INTERRUPT
{ SA_INTERRUPT, "SA_INTERRUPT" },
#endif
#ifdef SA_NOMASK
{ SA_NOMASK, "SA_NOMASK" },
#endif
#ifdef SA_ONESHOT
{ SA_ONESHOT, "SA_ONESHOT" },
#endif
#ifdef SA_SIGINFO
{ SA_SIGINFO, "SA_SIGINFO" },
#endif
#ifdef SA_RESETHAND
{ SA_RESETHAND, "SA_RESETHAND" },
#endif
#ifdef SA_ONSTACK
{ SA_ONSTACK, "SA_ONSTACK" },
#endif
#ifdef SA_NODEFER
{ SA_NODEFER, "SA_NODEFER" },
#endif
#ifdef SA_NOCLDSTOP
{ SA_NOCLDSTOP, "SA_NOCLDSTOP" },
#endif
#ifdef SA_NOCLDWAIT
{ SA_NOCLDWAIT, "SA_NOCLDWAIT" },
#endif
#ifdef _SA_BSDCALL
{ _SA_BSDCALL, "_SA_BSDCALL" },
#endif
{ 0, NULL },
};
static struct xlat sigprocmaskcmds[] = {
{ SIG_BLOCK, "SIG_BLOCK" },
{ SIG_UNBLOCK, "SIG_UNBLOCK" },
{ SIG_SETMASK, "SIG_SETMASK" },
#ifdef SIG_SETMASK32
{ SIG_SETMASK32,"SIG_SETMASK32" },
#endif
{ 0, NULL },
};
#endif /* HAVE_SIGACTION */
/* Anonymous realtime signals. */
/* Under glibc 2.1, SIGRTMIN et al are functions, but __SIGRTMIN is a
constant. This is what we want. Otherwise, just use SIGRTMIN. */
#ifdef SIGRTMIN
#ifndef __SIGRTMIN
#define __SIGRTMIN SIGRTMIN
#define __SIGRTMAX SIGRTMAX /* likewise */
#endif
#endif
char *
signame(sig)
int sig;
{
static char buf[30];
if (sig < nsignals) {
return signalent[sig];
#ifdef SIGRTMIN
} else if (sig >= __SIGRTMIN && sig <= __SIGRTMAX) {
sprintf(buf, "SIGRT_%ld", (long)(sig - __SIGRTMIN));
return buf;
#endif /* SIGRTMIN */
} else {
sprintf(buf, "%d", sig);
return buf;
}
}
#ifndef UNIXWARE
static void
long_to_sigset(l, s)
long l;
sigset_t *s;
{
sigemptyset(s);
*(long *)s = l;
}
#endif
static int
copy_sigset_len(tcp, addr, s, len)
struct tcb *tcp;
int addr;
sigset_t *s;
int len;
{
if (len > sizeof(*s))
len = sizeof(*s);
sigemptyset(s);
if (umoven(tcp, addr, len, (char *)s) < 0)
return -1;
return 0;
}
#ifdef LINUX
/* Original sigset is unsigned long */
#define copy_sigset(tcp, addr, s) copy_sigset_len(tcp, addr, s, sizeof(long))
#else
#define copy_sigset(tcp, addr, s) copy_sigset_len(tcp, addr, s, sizeof(sigset_t))
#endif
static char *
sprintsigmask(s, mask, rt)
char *s;
sigset_t *mask;
int rt; /* set might include realtime sigs */
{
int i, nsigs;
int maxsigs;
char *format;
static char outstr[256];
strcpy(outstr, s);
s = outstr + strlen(outstr);
nsigs = 0;
maxsigs = nsignals;
#ifdef __SIGRTMAX
if (rt)
maxsigs = __SIGRTMAX; /* instead */
#endif
for (i = 1; i < maxsigs; i++) {
if (sigismember(mask, i) == 1)
nsigs++;
}
if (nsigs >= nsignals * 2 / 3) {
*s++ = '~';
for (i = 1; i < maxsigs; i++) {
switch (sigismember(mask, i)) {
case 1:
sigdelset(mask, i);
break;
case 0:
sigaddset(mask, i);
break;
}
}
}
format = "%s";
*s++ = '[';
for (i = 1; i < maxsigs; i++) {
if (sigismember(mask, i) == 1) {
sprintf(s, format, signame(i) + 3); s += strlen(s);
format = " %s";
}
}
*s++ = ']';
*s = '\0';
return outstr;
}
static void
printsigmask(mask, rt)
sigset_t *mask;
int rt;
{
tprintf("%s", sprintsigmask("", mask, rt));
}
void
printsignal(nr)
int nr;
{
tprintf(signame(nr));
}
/*
* Check process TCP for the disposition of signal SIG.
* Return 1 if the process would somehow manage to survive signal SIG,
* else return 0. This routine will never be called with SIGKILL.
*/
int
sigishandled(tcp, sig)
struct tcb *tcp;
int sig;
{
#ifdef LINUX
int sfd;
char sname[32];
char buf[1024];
char *s;
int i;
unsigned int signalled, blocked, ignored, caught;
/* This is incredibly costly but it's worth it. */
sprintf(sname, "/proc/%d/stat", tcp->pid);
if ((sfd = open(sname, O_RDONLY)) == -1) {
perror(sname);
return 1;
}
i = read(sfd, buf, 1024);
buf[i] = '\0';
close(sfd);
/*
* Skip the extraneous fields. This loses if the
* command name has any spaces in it. So be it.
*/
for (i = 0, s = buf; i < 30; i++) {
while (*++s != ' ') {
if (!*s)
break;
}
}
if (sscanf(s, "%u%u%u%u",
&signalled, &blocked, &ignored, &caught) != 4) {
fprintf(stderr, "/proc/pid/stat format error\n");
return 1;
}
#ifdef DEBUG
fprintf(stderr, "sigs: %08x %08x %08x %08x\n",
signalled, blocked, ignored, caught);
#endif
if ((ignored & sigmask(sig)) || (caught & sigmask(sig)))
return 1;
#endif /* LINUX */
#ifdef SUNOS4
void (*u_signal)();
if (upeek(tcp->pid, uoff(u_signal[0]) + sig*sizeof(u_signal),
(long *) &u_signal) < 0) {
return 0;
}
if (u_signal != SIG_DFL)
return 1;
#endif /* SUNOS4 */
#ifdef SVR4
/*
* Since procfs doesn't interfere with wait I think it is safe
* to punt on this question. If not, the information is there.
*/
return 1;
#else /* !SVR4 */
switch (sig) {
case SIGCONT:
case SIGSTOP:
case SIGTSTP:
case SIGTTIN:
case SIGTTOU:
case SIGCHLD:
case SIGIO:
#if defined(SIGURG) && SIGURG != SIGIO
case SIGURG:
#endif
case SIGWINCH:
/* Gloria Gaynor says ... */
return 1;
default:
break;
}
return 0;
#endif /* !SVR4 */
}
#if defined(SUNOS4)
int
sys_sigvec(tcp)
struct tcb *tcp;
{
struct sigvec sv;
long addr;
if (entering(tcp)) {
printsignal(tcp->u_arg[0]);
tprintf(", ");
addr = tcp->u_arg[1];
} else {
addr = tcp->u_arg[2];
}
if (addr == 0)
tprintf("NULL");
else if (!verbose(tcp))
tprintf("%#lx", addr);
else if (umove(tcp, addr, &sv) < 0)
tprintf("{...}");
else {
switch ((int) sv.sv_handler) {
case (int) SIG_ERR:
tprintf("{SIG_ERR}");
break;
case (int) SIG_DFL:
tprintf("{SIG_DFL}");
break;
case (int) SIG_IGN:
if (tcp->u_arg[0] == SIGTRAP) {
tcp->flags |= TCB_SIGTRAPPED;
kill(tcp->pid, SIGSTOP);
}
tprintf("{SIG_IGN}");
break;
case (int) SIG_HOLD:
if (tcp->u_arg[0] == SIGTRAP) {
tcp->flags |= TCB_SIGTRAPPED;
kill(tcp->pid, SIGSTOP);
}
tprintf("SIG_HOLD");
break;
default:
if (tcp->u_arg[0] == SIGTRAP) {
tcp->flags |= TCB_SIGTRAPPED;
kill(tcp->pid, SIGSTOP);
}
tprintf("{%#lx, ", (unsigned long) sv.sv_handler);
printsigmask(&sv.sv_mask, 0);
tprintf(", ");
if (!printflags(sigvec_flags, sv.sv_flags))
tprintf("0");
tprintf("}");
}
}
if (entering(tcp))
tprintf(", ");
return 0;
}
int
sys_sigpause(tcp)
struct tcb *tcp;
{
if (entering(tcp)) { /* WTA: UD had a bug here: he forgot the braces */
sigset_t sigm;
long_to_sigset(tcp->u_arg[0], &sigm);
printsigmask(&sigm, 0);
}
return 0;
}
int
sys_sigstack(tcp)
struct tcb *tcp;
{
struct sigstack ss;
long addr;
if (entering(tcp))
addr = tcp->u_arg[0];
else
addr = tcp->u_arg[1];
if (addr == 0)
tprintf("NULL");
else if (umove(tcp, addr, &ss) < 0)
tprintf("%#lx", addr);
else {
tprintf("{ss_sp %#lx ", (unsigned long) ss.ss_sp);
tprintf("ss_onstack %s}", ss.ss_onstack ? "YES" : "NO");
}
if (entering(tcp))
tprintf(", ");
return 0;
}
int
sys_sigcleanup(tcp)
struct tcb *tcp;
{
return 0;
}
#endif /* SUNOS4 */
#ifndef SVR4
int
sys_sigsetmask(tcp)
struct tcb *tcp;
{
if (entering(tcp)) {
sigset_t sigm;
long_to_sigset(tcp->u_arg[0], &sigm);
printsigmask(&sigm, 0);
if ((tcp->u_arg[0] & sigmask(SIGTRAP))) {
/* Mark attempt to block SIGTRAP */
tcp->flags |= TCB_SIGTRAPPED;
/* Send unblockable signal */
kill(tcp->pid, SIGSTOP);
}
}
else if (!syserror(tcp)) {
sigset_t sigm;
long_to_sigset(tcp->u_rval, &sigm);
tcp->auxstr = sprintsigmask("old mask ", &sigm, 0);
return RVAL_HEX | RVAL_STR;
}
return 0;
}
int
sys_sigblock(tcp)
struct tcb *tcp;
{
return sys_sigsetmask(tcp);
}
#endif /* !SVR4 */
#ifdef HAVE_SIGACTION
#ifdef LINUX
struct old_sigaction {
__sighandler_t __sa_handler;
unsigned long sa_mask;
unsigned long sa_flags;
void (*sa_restorer)(void);
};
#define SA_HANDLER __sa_handler
#endif /* LINUX */
#ifndef SA_HANDLER
#define SA_HANDLER sa_handler
#endif
int
sys_sigaction(tcp)
struct tcb *tcp;
{
long addr;
sigset_t sigset;
#ifdef LINUX
struct old_sigaction sa;
#else
struct sigaction sa;
#endif
if (entering(tcp)) {
printsignal(tcp->u_arg[0]);
tprintf(", ");
addr = tcp->u_arg[1];
} else
addr = tcp->u_arg[2];
if (addr == 0)
tprintf("NULL");
else if (!verbose(tcp))
tprintf("%#lx", addr);
else if (umove(tcp, addr, &sa) < 0)
tprintf("{...}");
else {
switch ((long) sa.SA_HANDLER) {
case (long) SIG_ERR:
tprintf("{SIG_ERR}");
break;
case (long) SIG_DFL:
tprintf("{SIG_DFL}");
break;
case (long) SIG_IGN:
#ifndef SVR4
if (tcp->u_arg[0] == SIGTRAP) {
tcp->flags |= TCB_SIGTRAPPED;
kill(tcp->pid, SIGSTOP);
}
#endif /* !SVR4 */
tprintf("{SIG_IGN}");
break;
default:
#ifndef SVR4
if (tcp->u_arg[0] == SIGTRAP) {
tcp->flags |= TCB_SIGTRAPPED;
kill(tcp->pid, SIGSTOP);
}
#endif /* !SVR4 */
tprintf("{%#lx, ", (long) sa.SA_HANDLER);
long_to_sigset(sa.sa_mask, &sigset);
printsigmask(&sigset, 0);
tprintf(", ");
if (!printflags(sigact_flags, sa.sa_flags))
tprintf("0");
tprintf("}");
}
}
if (entering(tcp))
tprintf(", ");
#ifdef LINUX
else
tprintf(", %#lx", (unsigned long) sa.sa_restorer);
#endif
return 0;
}
int
sys_signal(tcp)
struct tcb *tcp;
{
if (entering(tcp)) {
printsignal(tcp->u_arg[0]);
switch (tcp->u_arg[1]) {
case (int) SIG_ERR:
tprintf("SIG_ERR");
break;
case (int) SIG_DFL:
tprintf("SIG_DFL");
break;
case (int) SIG_IGN:
#ifndef SVR4
if (tcp->u_arg[0] == SIGTRAP) {
tcp->flags |= TCB_SIGTRAPPED;
kill(tcp->pid, SIGSTOP);
}
#endif /* !SVR4 */
tprintf("SIG_IGN");
break;
default:
#ifndef SVR4
if (tcp->u_arg[0] == SIGTRAP) {
tcp->flags |= TCB_SIGTRAPPED;
kill(tcp->pid, SIGSTOP);
}
#endif /* !SVR4 */
tprintf("%#lx", tcp->u_arg[1]);
}
}
return 0;
}
#endif /* HAVE_SIGACTION */
#ifdef LINUX
int
sys_sigreturn(tcp)
struct tcb *tcp;
{
#ifdef I386
long esp;
struct sigcontext_struct sc;
if (entering(tcp)) {
tcp->u_arg[0] = 0;
if (upeek(tcp->pid, 4*UESP, &esp) < 0)
return 0;
if (umove(tcp, esp, &sc) < 0)
return 0;
tcp->u_arg[0] = 1;
tcp->u_arg[1] = sc.oldmask;
}
else {
sigset_t sigm;
long_to_sigset(tcp->u_arg[1], &sigm);
tcp->u_rval = tcp->u_error = 0;
if (tcp->u_arg[0] == 0)
return 0;
tcp->auxstr = sprintsigmask("mask now ", &sigm, 0);
return RVAL_NONE | RVAL_STR;
}
return 0;
#else /* !I386 */
#ifdef POWERPC
long esp;
struct sigcontext_struct sc;
if (entering(tcp)) {
tcp->u_arg[0] = 0;
if (upeek(tcp->pid, 4*PT_R1, &esp) < 0)
return 0;
if (umove(tcp, esp, &sc) < 0)
return 0;
tcp->u_arg[0] = 1;
tcp->u_arg[1] = sc.oldmask;
}
else {
sigset_t sigm;
long_to_sigset(tcp->u_arg[1], &sigm);
tcp->u_rval = tcp->u_error = 0;
if (tcp->u_arg[0] == 0)
return 0;
tcp->auxstr = sprintsigmask("mask now ", &sigm, 0);
return RVAL_NONE | RVAL_STR;
}
return 0;
#else /* !POWERPC */
#ifdef M68K
long usp;
struct sigcontext sc;
if (entering(tcp)) {
tcp->u_arg[0] = 0;
if (upeek(tcp->pid, 4*PT_USP, &usp) < 0)
return 0;
if (umove(tcp, usp, &sc) < 0)
return 0;
tcp->u_arg[0] = 1;
tcp->u_arg[1] = sc.sc_mask;
}
else {
sigset_t sigm;
long_to_sigset(tcp->u_arg[1], &sigm);
tcp->u_rval = tcp->u_error = 0;
if (tcp->u_arg[0] == 0)
return 0;
tcp->auxstr = sprintsigmask("mask now ", &sigm, 0);
return RVAL_NONE | RVAL_STR;
}
return 0;
#else /* !M68K */
#ifdef ALPHA
long fp;
struct sigcontext_struct sc;
if (entering(tcp)) {
tcp->u_arg[0] = 0;
if (upeek(tcp->pid, REG_FP, &fp) < 0)
return 0;
if (umove(tcp, fp, &sc) < 0)
return 0;
tcp->u_arg[0] = 1;
tcp->u_arg[1] = sc.sc_mask;
}
else {
sigset_t sigm;
long_to_sigset(tcp->u_arg[1], &sigm);
tcp->u_rval = tcp->u_error = 0;
if (tcp->u_arg[0] == 0)
return 0;
tcp->auxstr = sprintsigmask("mask now ", &sigm, 0);
return RVAL_NONE | RVAL_STR;
}
return 0;
#else
#ifdef SPARC
long i1;
struct regs regs;
m_siginfo_t si;
if(ptrace(PTRACE_GETREGS, tcp->pid, (char *)&regs, 0) < 0) {
perror("sigreturn: PTRACE_GETREGS ");
return 0;
}
if(entering(tcp)) {
tcp->u_arg[0] = 0;
i1 = regs.r_o1;
if(umove(tcp, i1, &si) < 0) {
perror("sigreturn: umove ");
return 0;
}
tcp->u_arg[0] = 1;
tcp->u_arg[1] = si.si_mask;
} else {
sigset_t sigm;
long_to_sigset(tcp->u_arg[1], &sigm);
tcp->u_rval = tcp->u_error = 0;
if(tcp->u_arg[0] == 0)
return 0;
tcp->auxstr = sprintsigmask("mask now ", &sigm, 0);
return RVAL_NONE | RVAL_STR;
}
return 0;
#endif /* SPARC */
#endif /* ALPHA */
#endif /* !M68K */
#endif /* !POWERPC */
#endif /* !I386 */
}
int
sys_siggetmask(tcp)
struct tcb *tcp;
{
if (exiting(tcp)) {
sigset_t sigm;
long_to_sigset(tcp->u_rval, &sigm);
tcp->auxstr = sprintsigmask("mask ", &sigm, 0);
}
return RVAL_HEX | RVAL_STR;
}
int
sys_sigsuspend(tcp)
struct tcb *tcp;
{
if (entering(tcp)) {
sigset_t sigm;
long_to_sigset(tcp->u_arg[2], &sigm);
#if 0
/* first two are not really arguments, but print them anyway */
/* nevermind, they are an anachronism now, too bad... */
tprintf("%d, %#x, ", tcp->u_arg[0], tcp->u_arg[1]);
#endif
printsigmask(&sigm, 0);
}
return 0;
}
#endif /* LINUX */
#ifdef SVR4
int
sys_sigsuspend(tcp)
struct tcb *tcp;
{
sigset_t sigset;
if (entering(tcp)) {
if (umove(tcp, tcp->u_arg[0], &sigset) < 0)
tprintf("[?]");
else
printsigmask(sigset, 0);
}
return 0;
}
static struct xlat ucontext_flags[] = {
{ UC_SIGMASK, "UC_SIGMASK" },
{ UC_STACK, "UC_STACK" },
{ UC_CPU, "UC_CPU" },
#ifdef UC_FPU
{ UC_FPU, "UC_FPU" },
#endif
#ifdef UC_INTR
{ UC_INTR, "UC_INTR" },
#endif
{ 0, NULL },
};
#endif
#if defined SVR4 || defined LINUX
#if defined LINUX && !defined SS_ONSTACK
#define SS_ONSTACK 1
#define SS_DISABLE 2
#if __GLIBC_MINOR__ == 0
typedef struct
{
__ptr_t ss_sp;
int ss_flags;
size_t ss_size;
} stack_t;
#endif
#endif
static struct xlat sigaltstack_flags[] = {
{ SS_ONSTACK, "SS_ONSTACK" },
{ SS_DISABLE, "SS_DISABLE" },
{ 0, NULL },
};
#endif
#ifdef SVR4
static void
printcontext(tcp, ucp)
struct tcb *tcp;
ucontext_t *ucp;
{
tprintf("{");
if (!abbrev(tcp)) {
tprintf("uc_flags=");
if (!printflags(ucontext_flags, ucp->uc_flags))
tprintf("0");
tprintf(", uc_link=%#lx, ", (unsigned long) ucp->uc_link);
}
tprintf("uc_sigmask=");
printsigmask(ucp->uc_sigmask, 0);
if (!abbrev(tcp)) {
tprintf(", uc_stack={ss_sp=%#lx, ss_size=%d, ss_flags=",
(unsigned long) ucp->uc_stack.ss_sp,
ucp->uc_stack.ss_size);
if (!printflags(sigaltstack_flags, ucp->uc_stack.ss_flags))
tprintf("0");
tprintf("}");
}
tprintf(", ...}");
}
int
sys_getcontext(tcp)
struct tcb *tcp;
{
ucontext_t uc;
if (entering(tcp)) {
if (!tcp->u_arg[0])
tprintf("NULL");
else if (umove(tcp, tcp->u_arg[0], &uc) < 0)
tprintf("{...}");
else
printcontext(tcp, &uc);
}
return 0;
}
int
sys_setcontext(tcp)
struct tcb *tcp;
{
ucontext_t uc;
if (entering(tcp)) {
if (!tcp->u_arg[0])
tprintf("NULL");
else if (umove(tcp, tcp->u_arg[0], &uc) < 0)
tprintf("{...}");
else
printcontext(tcp, &uc);
}
else {
tcp->u_rval = tcp->u_error = 0;
if (tcp->u_arg[0] == 0)
return 0;
return RVAL_NONE;
}
return 0;
}
#endif /* SVR4 */
#ifdef LINUX
static int
print_stack_t(tcp, addr)
struct tcb *tcp;
unsigned long addr;
{
stack_t ss;
if (umove(tcp, addr, &ss) < 0)
return -1;
tprintf("{ss_sp=%#lx, ss_flags=", (unsigned long) ss.ss_sp);
if (!printflags(sigaltstack_flags, ss.ss_flags))
tprintf("0");
tprintf(", ss_size=%lu}", (unsigned long) ss.ss_size);
return 0;
}
int
sys_sigaltstack(tcp)
struct tcb *tcp;
{
if (entering(tcp)) {
if (tcp->u_arg[0] == 0)
tprintf("NULL");
else if (print_stack_t(tcp, tcp->u_arg[0]) < 0)
return -1;
}
else {
tprintf(", ");
if (tcp->u_arg[1] == 0)
tprintf("NULL");
else if (print_stack_t(tcp, tcp->u_arg[1]) < 0)
return -1;
}
return 0;
}
#endif
#ifdef HAVE_SIGACTION
int
sys_sigprocmask(tcp)
struct tcb *tcp;
{
#ifdef ALPHA
if (entering(tcp)) {
printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
tprintf(", ");
printsigmask(tcp->u_arg[1], 0);
}
else if (!syserror(tcp)) {
tcp->auxstr = sprintsigmask("old mask ", tcp->u_rval, 0);
return RVAL_HEX | RVAL_STR;
}
#else /* !ALPHA */
sigset_t sigset;
if (entering(tcp)) {
#ifdef SVR4
if (tcp->u_arg[0] == 0)
tprintf("0");
else
#endif /* SVR4 */
printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
tprintf(", ");
if (!tcp->u_arg[1])
tprintf("NULL, ");
else if (copy_sigset(tcp, tcp->u_arg[1], &sigset) < 0)
tprintf("%#lx, ", tcp->u_arg[1]);
else {
printsigmask(&sigset, 0);
tprintf(", ");
}
}
else {
if (!tcp->u_arg[2])
tprintf("NULL");
else if (syserror(tcp))
tprintf("%#lx", tcp->u_arg[2]);
else if (copy_sigset(tcp, tcp->u_arg[2], &sigset) < 0)
tprintf("[?]");
else
printsigmask(&sigset, 0);
}
#endif /* !ALPHA */
return 0;
}
#endif /* HAVE_SIGACTION */
int
sys_kill(tcp)
struct tcb *tcp;
{
if (entering(tcp)) {
tprintf("%ld, %s", tcp->u_arg[0], signame(tcp->u_arg[1]));
}
return 0;
}
int
sys_killpg(tcp)
struct tcb *tcp;
{
return sys_kill(tcp);
}
int
sys_sigpending(tcp)
struct tcb *tcp;
{
sigset_t sigset;
if (exiting(tcp)) {
if (syserror(tcp))
tprintf("%#lx", tcp->u_arg[0]);
else if (copy_sigset(tcp, tcp->u_arg[0], &sigset) < 0)
tprintf("[?]");
else
printsigmask(sigset, 0);
}
return 0;
}
#ifdef LINUX
int
sys_rt_sigprocmask(tcp)
struct tcb *tcp;
{
sigset_t sigset;
/* Note: arg[3] is the length of the sigset. */
if (entering(tcp)) {
printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
tprintf(", ");
if (!tcp->u_arg[1])
tprintf("NULL, ");
else if (copy_sigset_len(tcp, tcp->u_arg[1], &sigset, tcp->u_arg[3]) < 0)
tprintf("%#lx, ", tcp->u_arg[1]);
else {
printsigmask(&sigset, 1);
tprintf(", ");
}
}
else {
if (!tcp->u_arg[2])
tprintf("NULL");
else if (syserror(tcp))
tprintf("%#lx", tcp->u_arg[2]);
else if (copy_sigset_len(tcp, tcp->u_arg[2], &sigset, tcp->u_arg[3]) < 0)
tprintf("[?]");
else
printsigmask(&sigset, 1);
tprintf(", %lu", tcp->u_arg[3]);
}
return 0;
}
#if __GLIBC_MINOR__ < 1
/* Type for data associated with a signal. */
typedef union sigval
{
int sival_int;
void *sival_ptr;
} sigval_t;
# define __SI_MAX_SIZE 128
# define __SI_PAD_SIZE ((__SI_MAX_SIZE / sizeof (int)) - 3)
typedef struct siginfo
{
int si_signo; /* Signal number. */
int si_errno; /* If non-zero, an errno value associated with
this signal, as defined in <errno.h>. */
int si_code; /* Signal code. */
union
{
int _pad[__SI_PAD_SIZE];
/* kill(). */
struct
{
__pid_t si_pid; /* Sending process ID. */
__uid_t si_uid; /* Real user ID of sending process. */
} _kill;
/* POSIX.1b timers. */
struct
{
unsigned int _timer1;
unsigned int _timer2;
} _timer;
/* POSIX.1b signals. */
struct
{
__pid_t si_pid; /* Sending process ID. */
__uid_t si_uid; /* Real user ID of sending process. */
sigval_t si_sigval; /* Signal value. */
} _rt;
/* SIGCHLD. */
struct
{
__pid_t si_pid; /* Which child. */
int si_status; /* Exit value or signal. */
__clock_t si_utime;
__clock_t si_stime;
} _sigchld;
/* SIGILL, SIGFPE, SIGSEGV, SIGBUS. */
struct
{
void *si_addr; /* Faulting insn/memory ref. */
} _sigfault;
/* SIGPOLL. */
struct
{
int si_band; /* Band event for SIGPOLL. */
int si_fd;
} _sigpoll;
} _sifields;
} siginfo_t;
#endif
/* Structure describing the action to be taken when a signal arrives. */
struct new_sigaction
{
union
{
__sighandler_t __sa_handler;
void (*__sa_sigaction) (int, siginfo_t *, void *);
}
__sigaction_handler;
unsigned long sa_flags;
void (*sa_restorer) (void);
unsigned long int sa_mask[2];
};
int
sys_rt_sigaction(tcp)
struct tcb *tcp;
{
struct new_sigaction sa;
sigset_t sigset;
long addr;
if (entering(tcp)) {
printsignal(tcp->u_arg[0]);
tprintf(", ");
addr = tcp->u_arg[1];
} else
addr = tcp->u_arg[2];
if (addr == 0)
tprintf("NULL");
else if (!verbose(tcp))
tprintf("%#lx", addr);
else if (umove(tcp, addr, &sa) < 0)
tprintf("{...}");
else {
switch ((long) sa.__sigaction_handler.__sa_handler) {
case (long) SIG_ERR:
tprintf("{SIG_ERR}");
break;
case (long) SIG_DFL:
tprintf("{SIG_DFL}");
break;
case (long) SIG_IGN:
tprintf("{SIG_IGN}");
break;
default:
tprintf("{%#lx, ",
(long) sa.__sigaction_handler.__sa_handler);
sigemptyset(&sigset);
#ifdef LINUXSPARC
if (tcp->u_arg[4] <= sizeof(sigset))
memcpy(&sigset, &sa.sa_mask, tcp->u_arg[4]);
#else
if (tcp->u_arg[3] <= sizeof(sigset))
memcpy(&sigset, &sa.sa_mask, tcp->u_arg[3]);
#endif
else
memcpy(&sigset, &sa.sa_mask, sizeof(sigset));
printsigmask(&sigset, 1);
tprintf(", ");
if (!printflags(sigact_flags, sa.sa_flags))
tprintf("0");
tprintf("}");
}
}
if (entering(tcp))
tprintf(", ");
else
#ifdef LINUXSPARC
tprintf(", %#lx, %lu", tcp->u_arg[3], tcp->u_arg[4]);
#elif defined(ALPHA)
tprintf(", %lu, %#lx", tcp->u_arg[3], tcp->u_arg[4]);
#else
tprintf(", %lu", addr = tcp->u_arg[3]);
#endif
return 0;
}
int
sys_rt_sigpending(tcp)
struct tcb *tcp;
{
sigset_t sigset;
if (exiting(tcp)) {
if (syserror(tcp))
tprintf("%#lx", tcp->u_arg[0]);
else if (copy_sigset_len(tcp, tcp->u_arg[0],
&sigset, tcp->u_arg[1]) < 0)
tprintf("[?]");
else
printsigmask(sigset, 1);
}
return 0;
}
int
sys_rt_sigsuspend(tcp)
struct tcb *tcp;
{
if (entering(tcp)) {
sigset_t sigm;
if (copy_sigset_len(tcp, tcp->u_arg[0], &sigm, tcp->u_arg[1]) < 0)
tprintf("[?]");
else
printsigmask(&sigm, 1);
}
return 0;
}
#ifndef ILL_ILLOPC
#define ILL_ILLOPC 1 /* illegal opcode */
#define ILL_ILLOPN 2 /* illegal operand */
#define ILL_ILLADR 3 /* illegal addressing mode */
#define ILL_ILLTRP 4 /* illegal trap */
#define ILL_PRVOPC 5 /* privileged opcode */
#define ILL_PRVREG 6 /* privileged register */
#define ILL_COPROC 7 /* coprocessor error */
#define ILL_BADSTK 8 /* internal stack error */
#define FPE_INTDIV 1 /* integer divide by zero */
#define FPE_INTOVF 2 /* integer overflow */
#define FPE_FLTDIV 3 /* floating point divide by zero */
#define FPE_FLTOVF 4 /* floating point overflow */
#define FPE_FLTUND 5 /* floating point underflow */
#define FPE_FLTRES 6 /* floating point inexact result */
#define FPE_FLTINV 7 /* floating point invalid operation */
#define FPE_FLTSUB 8 /* subscript out of range */
#define SEGV_MAPERR 1 /* address not mapped to object */
#define SEGV_ACCERR 2 /* invalid permissions for mapped object */
#define BUS_ADRALN 1 /* invalid address alignment */
#define BUS_ADRERR 2 /* non-existant physical address */
#define BUS_OBJERR 3 /* object specific hardware error */
#define TRAP_BRKPT 1 /* process breakpoint */
#define TRAP_TRACE 2 /* process trace trap */
#define CLD_EXITED 1 /* child has exited */
#define CLD_KILLED 2 /* child was killed */
#define CLD_DUMPED 3 /* child terminated abnormally */
#define CLD_TRAPPED 4 /* traced child has trapped */
#define CLD_STOPPED 5 /* child has stopped */
#define CLD_CONTINUED 6 /* stopped child has continued */
#define POLL_IN 1 /* data input available */
#define POLL_OUT 2 /* output buffers available */
#define POLL_MSG 3 /* input message available */
#define POLL_ERR 4 /* i/o error */
#define POLL_PRI 5 /* high priority input available */
#define POLL_HUP 6 /* device disconnected */
#define SI_USER 0 /* sent by kill, sigsend, raise */
#define SI_QUEUE -1 /* sent by sigqueue */
#define SI_TIMER -2 /* sent by timer expiration */
#define SI_MESGQ -3 /* sent by real time mesq state change */
#define SI_ASYNCIO -4 /* sent by AIO completion */
#else
#undef si_pid
#undef si_uid
#undef si_status
#undef si_utime
#undef si_stime
#undef si_value
#undef si_int
#undef si_ptr
#undef si_addr
#undef si_band
#undef si_fd
#endif
static struct xlat sigill_flags[] = {
{ILL_ILLOPC, "ILL_ILLOPC"},
{ILL_ILLOPN, "ILL_ILLOPN"},
{ILL_ILLADR, "ILL_ILLADR"},
{ILL_ILLTRP, "ILL_ILLTRP"},
{ILL_PRVOPC, "ILL_PRVOPC"},
{ILL_PRVREG, "ILL_PRVREG"},
{ILL_COPROC, "ILL_COPROC"},
{ILL_BADSTK, "ILL_BADSTK"},
{0, NULL}
};
static struct xlat sigfpe_flags[] = {
{FPE_INTDIV, "FPE_INTDIV"},
{FPE_INTOVF, "FPE_INTOVF"},
{FPE_FLTDIV, "FPE_FLTDIV"},
{FPE_FLTOVF, "FPE_FLTOVF"},
{FPE_FLTUND, "FPE_FLTUND"},
{FPE_FLTRES, "FPE_FLTRES"},
{FPE_FLTINV, "FPE_FLTINV"},
{FPE_FLTSUB, "FPE_FLTSUB"},
{0, NULL}
};
static struct xlat sigsegv_flags[] = {
{SEGV_MAPERR, "SEGV_MAPERR"},
{SEGV_ACCERR, "SEGV_ACCERR"},
{0, NULL}
};
static struct xlat sigbus_flags[] = {
{BUS_ADRALN, "BUS_ADRALN"},
{BUS_ADRERR, "BUS_ADRERR"},
{BUS_OBJERR, "BUS_OBJERR"},
{0, NULL}
};
static struct xlat sigtrap_flags[] = {
{TRAP_BRKPT, "TRAP_BRKPT"},
{TRAP_TRACE, "TRAP_TRACE"},
{0, NULL}
};
static struct xlat sigchld_flags[] = {
{CLD_EXITED, "CLD_EXITED"},
{CLD_KILLED, "CLD_KILLED"},
{CLD_DUMPED, "CLD_DUMPED"},
{CLD_TRAPPED, "CLD_TRAPPED"},
{CLD_STOPPED, "CLD_STOPPED"},
{CLD_CONTINUED, "CLD_CONTINUED"},
{0, NULL}
};
static struct xlat sigpoll_flags[] = {
{POLL_IN, "POLL_IN"},
{POLL_OUT, "POLL_OUT"},
{POLL_MSG, "POLL_MSG"},
{POLL_ERR, "POLL_ERR"},
{POLL_PRI, "POLL_PRI"},
{POLL_HUP, "POLL_HUP"},
{0, NULL}
};
static struct xlat siginfo_flags[] = {
{SI_USER, "SI_USER"},
{SI_QUEUE, "SI_QUEUE"},
{SI_TIMER, "SI_TIMER"},
{SI_MESGQ, "SI_MESGQ"},
{SI_ASYNCIO, "SI_ASYNCIO"},
{0, NULL}
};
static void
printsiginfo(tcp, si)
struct tcb *tcp;
siginfo_t *si;
{
tprintf("{si_signo=");
printsignal(si->si_signo);
tprintf(", si_errno=%d, si_code=", si->si_errno);
switch(si->si_signo)
{
case SIGILL:
if (!printflags(sigill_flags, si->si_code))
tprintf("%d /* ILL_??? */", si->si_code);
tprintf(", si_addr=%lx",
(unsigned long) si->_sifields._sigfault.si_addr);
break;
case SIGFPE:
if (!printflags(sigfpe_flags, si->si_code))
tprintf("%d /* FPE_??? */", si->si_code);
tprintf(", si_addr=%lx",
(unsigned long) si->_sifields._sigfault.si_addr);
break;
case SIGSEGV:
if (!printflags(sigsegv_flags, si->si_code))
tprintf("%d /* SEGV_??? */", si->si_code);
tprintf(", si_addr=%lx",
(unsigned long) si->_sifields._sigfault.si_addr);
break;
case SIGBUS:
if (!printflags(sigbus_flags, si->si_code))
tprintf("%d /* BUS_??? */", si->si_code);
tprintf(", si_addr=%lx",
(unsigned long) si->_sifields._sigfault.si_addr);
break;
case SIGTRAP:
if (!printflags(sigtrap_flags, si->si_code))
tprintf("%d /* TRAP_??? */", si->si_code);
break;
case SIGCHLD:
if (!printflags(sigchld_flags, si->si_code))
tprintf("%d /* CLD_??? */", si->si_code);
if (!verbose(tcp))
tprintf(", ...");
else
tprintf(", si_pid=%d, si_uid=%d, si_status=%d, si_utime=%lu, si_stime=%lu",
si->_sifields._kill.si_pid,
si->_sifields._kill.si_uid,
si->_sifields._sigchld.si_status,
si->_sifields._sigchld.si_utime,
si->_sifields._sigchld.si_stime);
break;
case SIGPOLL:
if (!printflags(sigpoll_flags, si->si_code))
tprintf("%d /* POLL_??? */", si->si_code);
if (si->si_code == POLL_IN
|| si->si_code == POLL_OUT
|| si->si_code == POLL_MSG)
tprintf(", si_bind=%lu, si_fd=%d",
(unsigned long) si->_sifields._sigpoll.si_band,
si->_sifields._sigpoll.si_fd);
break;
default:
if (!printflags(siginfo_flags, si->si_code))
tprintf("%d /* SI_??? */", si->si_code);
tprintf(", si_pid=%lu, si_uid=%lu, si_value={",
(unsigned long) si->_sifields._rt.si_pid,
(unsigned long) si->_sifields._rt.si_uid);
if (!verbose(tcp))
tprintf("...");
else {
tprintf("sival_int=%u, sival_ptr=%#lx",
si->_sifields._rt.si_sigval.sival_int,
(unsigned long) si->_sifields._rt.si_sigval.sival_ptr);
}
tprintf("}");
break;
}
tprintf("}");
}
int
sys_rt_sigqueueinfo(tcp)
struct tcb *tcp;
{
if (entering(tcp)) {
siginfo_t si;
tprintf("%lu, ", tcp->u_arg[0]);
printsignal(tcp->u_arg[1]);
tprintf(", ");
if (umove(tcp, tcp->u_arg[2], &si) < 0)
tprintf("%#lx", tcp->u_arg[2]);
else
printsiginfo(&si);
}
return 0;
}
int sys_rt_sigtimedwait(tcp)
struct tcb *tcp;
{
if (entering(tcp)) {
sigset_t sigset;
if (copy_sigset_len(tcp, tcp->u_arg[0],
&sigset, tcp->u_arg[3]) < 0)
tprintf("[?]");
else
printsigmask(sigset, 1);
tprintf(", ");
}
else {
if (syserror(tcp))
tprintf("%#lx", tcp->u_arg[0]);
else {
siginfo_t si;
if (umove(tcp, tcp->u_arg[1], &si) < 0)
tprintf("%#lx", tcp->u_arg[1]);
else
printsiginfo(&si);
/* XXX For now */
tprintf(", %#lx", tcp->u_arg[2]);
tprintf(", %d", (int) tcp->u_arg[3]);
}
}
return 0;
};
#endif /* LINUX */
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