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signal.c
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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>
* Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
* Copyright (c) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
* Linux for s390 port by D.J. Barrow
* <barrow_dj@mail.yahoo.com,djbarrow@de.ibm.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id: signal.c,v 1.54 2005/06/01 19:02:37 roland Exp $
*/
#include "defs.h"
#include <signal.h>
#ifdef HAVE_ANDROID_OS
#else
#include <sys/user.h>
#endif
#include <fcntl.h>
#ifdef SVR4
#include <sys/ucontext.h>
#endif /* SVR4 */
#ifdef HAVE_SYS_REG_H
# include <sys/reg.h>
#ifndef PTRACE_PEEKUSR
# define PTRACE_PEEKUSR PTRACE_PEEKUSER
#endif
#ifndef PTRACE_POKEUSR
# define PTRACE_POKEUSR PTRACE_POKEUSER
#endif
#elif defined(HAVE_LINUX_PTRACE_H)
#undef PTRACE_SYSCALL
# ifdef HAVE_STRUCT_IA64_FPREG
# define ia64_fpreg XXX_ia64_fpreg
# endif
# ifdef HAVE_STRUCT_PT_ALL_USER_REGS
# define pt_all_user_regs XXX_pt_all_user_regs
# endif
#include <linux/ptrace.h>
# undef ia64_fpreg
# undef pt_all_user_regs
#endif
#ifdef LINUX
#ifdef IA64
# include <asm/ptrace_offsets.h>
#endif /* !IA64 */
#if HAVE_ASM_REG_H
# if defined (SPARC) || defined (SPARC64)
# define fpq kernel_fpq
# define fq kernel_fq
# define fpu kernel_fpu
# endif
# include <asm/reg.h>
# if defined (SPARC) || defined (SPARC64)
# undef fpq
# undef fq
# undef fpu
# endif
#if defined (LINUX) && defined (SPARC64)
# define r_pc r_tpc
# undef PTRACE_GETREGS
# define PTRACE_GETREGS PTRACE_GETREGS64
# undef PTRACE_SETREGS
# define PTRACE_SETREGS PTRACE_SETREGS64
#endif /* LINUX && SPARC64 */
#endif /* HAVE_ASM_REG_H */
#if defined (SPARC) || defined (SPARC64)
typedef struct {
struct regs si_regs;
int si_mask;
} m_siginfo_t;
#elif defined HAVE_ASM_SIGCONTEXT_H
#if !defined(IA64) && !defined(X86_64)
#include <asm/sigcontext.h>
#endif /* !IA64 && !X86_64 */
#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 */
const char *const signalent0[] = {
#include "signalent.h"
};
const int nsignals0 = sizeof signalent0 / sizeof signalent0[0];
#if SUPPORTED_PERSONALITIES >= 2
const char *const signalent1[] = {
#include "signalent1.h"
};
const int nsignals1 = sizeof signalent1 / sizeof signalent1[0];
#endif /* SUPPORTED_PERSONALITIES >= 2 */
#if SUPPORTED_PERSONALITIES >= 3
const char *const signalent2[] = {
#include "signalent2.h"
};
const int nsignals2 = sizeof signalent2 / sizeof signalent2[0];
#endif /* SUPPORTED_PERSONALITIES >= 3 */
const char *const *signalent;
int nsignals;
#if defined(SUNOS4) || defined(FREEBSD)
static const struct xlat sigvec_flags[] = {
{ SV_ONSTACK, "SV_ONSTACK" },
{ SV_INTERRUPT, "SV_INTERRUPT" },
{ SV_RESETHAND, "SV_RESETHAND" },
{ SA_NOCLDSTOP, "SA_NOCLDSTOP" },
{ 0, NULL },
};
#endif /* SUNOS4 || FREEBSD */
#ifdef HAVE_SIGACTION
#if defined LINUX && (defined I386 || defined X86_64)
/* The libc headers do not define this constant since it should only be
used by the implementation. So wwe define it here. */
# ifndef SA_RESTORER
# define SA_RESTORER 0x04000000
# endif
#endif
static const struct xlat sigact_flags[] = {
#ifdef SA_RESTORER
{ SA_RESTORER, "SA_RESTORER" },
#endif
#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 const 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
const char *
signame(sig)
int sig;
{
static char buf[30];
if (sig >= 0 && 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;
long 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[8 * sizeof(sigset_t) * 8];
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) {
/* real-time signals on solaris don't have
* signalent entries
*/
if (i < nsignals) {
sprintf(s, format, signalent[i] + 3);
}
#ifdef SIGRTMIN
else if (i >= __SIGRTMIN && i <= __SIGRTMAX) {
char tsig[40];
sprintf(tsig, "RT_%u", i - __SIGRTMIN);
sprintf(s, format, tsig);
}
#endif /* SIGRTMIN */
else {
char tsig[32];
sprintf(tsig, "%u", i);
sprintf(s, format, tsig);
}
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));
}
#ifdef LINUX
#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 */
#define SI_SIGIO -5 /* Sent by SIGIO */
#define SI_TKILL -6 /* Sent by tkill */
#endif
#if __GLIBC_MINOR__ < 1 && !defined(HAVE_ANDROID_OS)
/* 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;
#define si_pid _sifields._kill.si_pid
#define si_uid _sifields._kill.si_uid
#define si_status _sifields._sigchld.si_status
#define si_utime _sifields._sigchld.si_utime
#define si_stime _sifields._sigchld.si_stime
#define si_value _sifields._rt.si_sigval
#define si_int _sifields._rt.si_sigval.sival_int
#define si_ptr _sifields._rt.si_sigval.sival_ptr
#define si_addr _sifields._sigfault.si_addr
#define si_band _sifields._sigpoll.si_band
#define si_fd _sifields._sigpoll.si_fd
#endif
#endif
#if defined (SVR4) || defined (LINUX)
static const struct xlat siginfo_codes[] = {
#ifdef SI_NOINFO
{ SI_NOINFO, "SI_NOINFO" },
#endif
#ifdef SI_USER
{ SI_USER, "SI_USER" },
#endif
#ifdef SI_LWP
{ SI_LWP, "SI_LWP" },
#endif
#ifdef SI_QUEUE
{ SI_QUEUE, "SI_QUEUE" },
#endif
#ifdef SI_TIMER
{ SI_TIMER, "SI_TIMER" },
#endif
#ifdef SI_ASYNCIO
{ SI_ASYNCIO, "SI_ASYNCIO" },
#endif
#ifdef SI_MESGQ
{ SI_MESGQ, "SI_MESGQ" },
#endif
#ifdef SI_SIGIO
{ SI_SIGIO, "SI_SIGIO" },
#endif
#ifdef SI_TKILL
{ SI_TKILL, "SI_TKILL" },
#endif
{ 0, NULL },
};
static const struct xlat sigill_codes[] = {
{ 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 const struct xlat sigfpe_codes[] = {
{ 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 const struct xlat sigtrap_codes[] = {
{ TRAP_BRKPT, "TRAP_BRKPT" },
{ TRAP_TRACE, "TRAP_TRACE" },
{ 0, NULL },
};
static const struct xlat sigchld_codes[] = {
{ 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 const struct xlat sigpoll_codes[] = {
{ 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 const struct xlat sigprof_codes[] = {
#ifdef PROF_SIG
{ PROF_SIG, "PROF_SIG" },
#endif
{ 0, NULL },
};
#ifdef SIGEMT
static const struct xlat sigemt_codes[] = {
#ifdef EMT_TAGOVF
{ EMT_TAGOVF, "EMT_TAGOVF" },
#endif
{ 0, NULL },
};
#endif
static const struct xlat sigsegv_codes[] = {
{ SEGV_MAPERR, "SEGV_MAPERR" },
{ SEGV_ACCERR, "SEGV_ACCERR" },
{ 0, NULL },
};
static const struct xlat sigbus_codes[] = {
{ BUS_ADRALN, "BUS_ADRALN" },
{ BUS_ADRERR, "BUS_ADRERR" },
{ BUS_OBJERR, "BUS_OBJERR" },
{ 0, NULL },
};
void
printsiginfo(sip, verbose)
siginfo_t *sip;
int verbose;
{
const char *code;
if (sip->si_signo == 0) {
tprintf ("{}");
return;
}
tprintf("{si_signo=");
printsignal(sip->si_signo);
code = xlookup(siginfo_codes, sip->si_code);
if (!code) {
switch (sip->si_signo) {
case SIGTRAP:
code = xlookup(sigtrap_codes, sip->si_code);
break;
case SIGCHLD:
code = xlookup(sigchld_codes, sip->si_code);
break;
case SIGPOLL:
code = xlookup(sigpoll_codes, sip->si_code);
break;
case SIGPROF:
code = xlookup(sigprof_codes, sip->si_code);
break;
case SIGILL:
code = xlookup(sigill_codes, sip->si_code);
break;
#ifdef SIGEMT
case SIGEMT:
code = xlookup(sigemt_codes, sip->si_code);
break;
#endif
case SIGFPE:
code = xlookup(sigfpe_codes, sip->si_code);
break;
case SIGSEGV:
code = xlookup(sigsegv_codes, sip->si_code);
break;
case SIGBUS:
code = xlookup(sigbus_codes, sip->si_code);
break;
}
}
if (code)
tprintf(", si_code=%s", code);
else
tprintf(", si_code=%#x", sip->si_code);
#ifdef SI_NOINFO
if (sip->si_code != SI_NOINFO)
#endif
{
if (sip->si_errno) {
if (sip->si_errno < 0 || sip->si_errno >= nerrnos)
tprintf(", si_errno=%d", sip->si_errno);
else
tprintf(", si_errno=%s",
errnoent[sip->si_errno]);
}
#ifdef SI_FROMUSER
if (SI_FROMUSER(sip)) {
tprintf(", si_pid=%ld, si_uid=%ld",
sip->si_pid, sip->si_uid);
#ifdef SI_QUEUE
switch (sip->si_code) {
case SI_QUEUE:
#ifdef SI_TIMER
case SI_TIMER:
#endif /* SI_QUEUE */
case SI_ASYNCIO:
#ifdef SI_MESGQ
case SI_MESGQ:
#endif /* SI_MESGQ */
tprintf(", si_value=%d",
sip->si_value.sival_int);
break;
}
#endif /* SI_QUEUE */
}
else
#endif /* SI_FROMUSER */
{
switch (sip->si_signo) {
case SIGCHLD:
tprintf(", si_pid=%ld, si_status=",
(long) sip->si_pid);
if (sip->si_code == CLD_EXITED)
tprintf("%d", sip->si_status);
else
printsignal(sip->si_status);
#if LINUX
if (!verbose)
tprintf(", ...");
else
tprintf(", si_utime=%lu, si_stime=%lu",
sip->si_utime,
sip->si_stime);
#endif
break;
case SIGILL: case SIGFPE:
case SIGSEGV: case SIGBUS:
tprintf(", si_addr=%#lx",
(unsigned long) sip->si_addr);
break;
case SIGPOLL:
switch (sip->si_code) {
case POLL_IN: case POLL_OUT: case POLL_MSG:
tprintf(", si_band=%ld",
(long) sip->si_band);
break;
}
break;
#ifdef LINUX
default:
tprintf(", si_pid=%lu, si_uid=%lu, ",
(unsigned long) sip->si_pid,
(unsigned long) sip->si_uid);
if (!verbose)
tprintf("...");
else {
tprintf("si_value={int=%u, ptr=%#lx}",
sip->si_int,
(unsigned long) sip->si_ptr);
}
#endif
}
}
}
tprintf("}");
}
#endif /* SVR4 || LINUX */
#ifdef LINUX
static void
parse_sigset_t (const char *str, sigset_t *set)
{
const char *p;
unsigned int digit;
int i;
sigemptyset(set);
p = strchr(str, '\n');
if (p == NULL)
p = strchr(str, '\0');
for (i = 0; p-- > str; i += 4) {
if (*p >= '0' && *p <= '9')
digit = *p - '0';
else if (*p >= 'a' && *p <= 'f')
digit = *p - 'a' + 10;
else if (*p >= 'A' && *p <= 'F')
digit = *p - 'A' + 10;
else
break;
if (digit & 1)
sigaddset(set, i + 1);
if (digit & 2)
sigaddset(set, i + 2);
if (digit & 4)
sigaddset(set, i + 3);
if (digit & 8)
sigaddset(set, i + 4);
}
}
#endif
/*
* 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[2048];
char *s;
int i;
sigset_t ignored, caught;
#endif
#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;
}
#endif /* !SVR4 */
#ifdef LINUX
/* This is incredibly costly but it's worth it. */
/* NOTE: LinuxThreads internally uses SIGRTMIN, SIGRTMIN + 1 and
SIGRTMIN + 2, so we can't use the obsolete /proc/%d/stat which
doesn't handle real-time signals). */
sprintf(sname, "/proc/%d/status", tcp->pid);
if ((sfd = open(sname, O_RDONLY)) == -1) {
perror(sname);
return 1;
}
i = read(sfd, buf, sizeof(buf));
buf[i] = '\0';
close(sfd);
/*
* Skip the extraneous fields. We need to skip
* command name has any spaces in it. So be it.
*/
s = strstr(buf, "SigIgn:\t");
if (!s)
{
fprintf(stderr, "/proc/pid/status format error\n");
return 1;
}
parse_sigset_t(s + 8, &ignored);
s = strstr(buf, "SigCgt:\t");
if (!s)
{
fprintf(stderr, "/proc/pid/status format error\n");
return 1;
}
parse_sigset_t(s + 8, &caught);
#ifdef DEBUG
fprintf(stderr, "sigs: %016qx %016qx (sig=%d)\n",
*(long long *) &ignored, *(long long *) &caught, sig);
#endif
if (sigismember(&ignored, sig) || sigismember(&caught, 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 */
return 0;
}
#if defined(SUNOS4) || defined(FREEBSD)
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(", ");
printflags(sigvec_flags, sv.sv_flags, "SV_???");
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)