#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
# ifdef HAVE_STRUCT_PT_ALL_USER_REGS
# define pt_all_user_regs XXX_pt_all_user_regs
# endif
+# ifdef HAVE_STRUCT_PTRACE_PEEKSIGINFO_ARGS
+# define ptrace_peeksiginfo_args XXX_ptrace_peeksiginfo_args
+# endif
# include <linux/ptrace.h>
+# undef ptrace_peeksiginfo_args
# undef ia64_fpreg
# undef pt_all_user_regs
#endif
# include <asm/sigcontext.h>
# endif
#else /* !HAVE_ASM_SIGCONTEXT_H */
-# if defined I386 && !defined HAVE_STRUCT_SIGCONTEXT_STRUCT
-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 */
-# if defined M68K && !defined HAVE_STRUCT_SIGCONTEXT
-struct sigcontext
-{
+# if defined M68K && !defined HAVE_STRUCT_SIGCONTEXT
+struct sigcontext {
unsigned long sc_mask;
unsigned long sc_usp;
unsigned long sc_d0;
unsigned long sc_pc;
unsigned short sc_formatvec;
};
-# endif /* M68K */
-# endif /* !I386 */
+# endif /* M68K */
#endif /* !HAVE_ASM_SIGCONTEXT_H */
#ifndef NSIG
# warning: NSIG is not defined, using 32
# define NSIG 32
-#endif
-#ifdef ARM
-/* Ugh. Is this really correct? ARM has no RT signals?! */
-# undef NSIG
-# define NSIG 32
+#elif NSIG < 32
+# error: NSIG < 32
#endif
#ifdef HAVE_SIGACTION
-#if defined I386 || defined X86_64 || defined X32
/* The libc headers do not define this constant since it should only be
used by the implementation. So we define it here. */
-# ifndef SA_RESTORER
-# define SA_RESTORER 0x04000000
+#ifndef SA_RESTORER
+# ifdef ASM_SA_RESTORER
+# define SA_RESTORER ASM_SA_RESTORER
# 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_NODEFER
- { SA_NODEFER, "SA_NODEFER" },
-#endif
-#if defined SA_NOMASK && SA_NODEFER != SA_NOMASK
- { SA_NOMASK, "SA_NOMASK" },
-#endif
-#ifdef SA_RESETHAND
- { SA_RESETHAND, "SA_RESETHAND" },
-#endif
-#if defined SA_ONESHOT && SA_ONESHOT != SA_RESETHAND
- { 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
-#ifdef SA_NOPTRACE
- { SA_NOPTRACE, "SA_NOPTRACE" },
-#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 },
-};
+#include "xlat/sigact_flags.h"
+#include "xlat/sigprocmaskcmds.h"
#endif /* HAVE_SIGACTION */
return buf;
}
-static void
-long_to_sigset(long l, sigset_t *s)
+static unsigned int
+popcount32(const uint32_t *a, unsigned int size)
{
- sigemptyset(s);
- *(long *)s = l;
-}
+ unsigned int count = 0;
-static int
-copy_sigset_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;
-}
+ for (; size; ++a, --size) {
+ uint32_t x = *a;
+
+#ifdef HAVE___BUILTIN_POPCOUNT
+ count += __builtin_popcount(x);
+#else
+ for (; x; ++count)
+ x &= x - 1;
+#endif
+ }
-/* Original sigset is unsigned long */
-#define copy_sigset(tcp, addr, s) copy_sigset_len(tcp, addr, s, sizeof(long))
+ return count;
+}
static const char *
-sprintsigmask(const char *str, sigset_t *mask, int rt)
-/* set might include realtime sigs */
+sprintsigmask_n(const char *prefix, const void *sig_mask, unsigned int bytes)
{
- /* Was [8 * sizeof(sigset_t) * 8], but
- * glibc sigset_t is huge (1024 bits = 128 *bytes*),
- * and we were ending up with 8k (!) buffer here.
- *
- * No Unix system can have sig > 255
- * (waitpid API won't be able to indicate death from one)
- * and sig 0 doesn't exist either.
- * Therefore max possible no of sigs is 255: 1..255
+ /*
+ * The maximum number of signal names to be printed is NSIG * 2 / 3.
+ * Most of signal names have length 7,
+ * average length of signal names is less than 7.
+ * The length of prefix string does not exceed 16.
*/
- static char outstr[8 * (255 * 2 / 3)];
+ static char outstr[128 + 8 * (NSIG * 2 / 3)];
- int i, nsigs;
- int maxsigs;
- int show_members;
- char sep;
char *s;
+ const uint32_t *mask;
+ uint32_t inverted_mask[NSIG / 32];
+ unsigned int size;
+ int i;
+ char sep;
- maxsigs = nsignals;
-#ifdef __SIGRTMAX
- if (rt)
- maxsigs = __SIGRTMAX; /* instead */
-#endif
- s = stpcpy(outstr, str);
- nsigs = 0;
- for (i = 1; i < maxsigs; i++) {
- if (sigismember(mask, i) == 1)
- nsigs++;
- }
+ s = stpcpy(outstr, prefix);
- /* 1: show mask members, 0: show those which are NOT in mask */
- show_members = (nsigs < nsignals * 2 / 3);
- if (!show_members)
+ mask = sig_mask;
+ /* length of signal mask in 4-byte words */
+ size = (bytes >= NSIG / 8) ? NSIG / 32 : (bytes + 3) / 4;
+
+ /* check whether 2/3 or more bits are set */
+ if (popcount32(mask, size) >= size * 32 * 2 / 3) {
+ /* show those signals that are NOT in the mask */
+ unsigned int j;
+ for (j = 0; j < size; ++j)
+ inverted_mask[j] = ~mask[j];
+ mask = inverted_mask;
*s++ = '~';
+ }
sep = '[';
- for (i = 1; i < maxsigs; i++) {
- if (sigismember(mask, i) == show_members) {
- /* real-time signals on solaris don't have
- * signalent entries
- */
- char tsig[40];
- *s++ = sep;
- if (i < nsignals) {
- s = stpcpy(s, signalent[i] + 3);
- }
+ for (i = 0; (i = next_set_bit(mask, i, size * 32)) >= 0; ) {
+ ++i;
+ *s++ = sep;
+ if (i < nsignals) {
+ s = stpcpy(s, signalent[i] + 3);
+ }
#ifdef SIGRTMIN
- else if (i >= __SIGRTMIN && i <= __SIGRTMAX) {
- sprintf(tsig, "RT_%u", i - __SIGRTMIN);
- s = stpcpy(s, tsig);
- }
-#endif /* SIGRTMIN */
- else {
- sprintf(tsig, "%u", i);
- s = stpcpy(s, tsig);
- }
- sep = ' ';
+ else if (i >= __SIGRTMIN && i <= __SIGRTMAX) {
+ s += sprintf(s, "RT_%u", i - __SIGRTMIN);
}
+#endif
+ else {
+ s += sprintf(s, "%u", i);
+ }
+ sep = ' ';
}
if (sep == '[')
*s++ = sep;
return outstr;
}
-static void
-printsigmask(sigset_t *mask, int rt)
-{
- tprints(sprintsigmask("", mask, rt));
-}
+#define tprintsigmask_addr(prefix, mask) \
+ tprints(sprintsigmask_n((prefix), (mask), sizeof(mask)))
+
+#define sprintsigmask_val(prefix, mask) \
+ sprintsigmask_n((prefix), &(mask), sizeof(mask))
+
+#define tprintsigmask_val(prefix, mask) \
+ tprints(sprintsigmask_n((prefix), &(mask), sizeof(mask)))
void
printsignal(int nr)
}
void
-print_sigset(struct tcb *tcp, long addr, int rt)
+print_sigset_addr_len(struct tcb *tcp, long addr, long len)
{
- sigset_t ss;
+ char mask[NSIG / 8];
- if (!addr)
+ if (!addr) {
tprints("NULL");
- else if (copy_sigset(tcp, addr, &ss) < 0)
+ return;
+ }
+ /* Here len is usually equals NSIG / 8 or current_wordsize.
+ * But we code this defensively:
+ */
+ if (len < 0) {
+ bad:
tprintf("%#lx", addr);
+ return;
+ }
+ if (len >= NSIG / 8)
+ len = NSIG / 8;
else
- printsigmask(&ss, rt);
+ len = (len + 3) & ~3;
+
+ if (umoven(tcp, addr, len, mask) < 0)
+ goto bad;
+ tprints(sprintsigmask_n("", mask, len));
}
#ifndef ILL_ILLOPC
#define BUS_ADRALN 1 /* invalid address alignment */
#define BUS_ADRERR 2 /* non-existant physical address */
#define BUS_OBJERR 3 /* object specific hardware error */
+#define SYS_SECCOMP 1 /* seccomp triggered */
#define TRAP_BRKPT 1 /* process breakpoint */
#define TRAP_TRACE 2 /* process trace trap */
#define CLD_EXITED 1 /* child has exited */
#define SI_ASYNCIO -4 /* sent by AIO completion */
#define SI_SIGIO -5 /* sent by SIGIO */
#define SI_TKILL -6 /* sent by tkill */
+#define SI_DETHREAD -7 /* sent by execve killing subsidiary threads */
#define SI_ASYNCNL -60 /* sent by asynch name lookup completion */
#endif
# define SI_FROMUSER(sip) ((sip)->si_code <= 0)
#endif
-#if defined(__GLIBC__) && (__GLIBC__ < 2 || (__GLIBC__ == 2 && __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;
-
-#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
+#include "xlat/siginfo_codes.h"
+#include "xlat/sigill_codes.h"
+#include "xlat/sigfpe_codes.h"
+#include "xlat/sigtrap_codes.h"
+#include "xlat/sigchld_codes.h"
+#include "xlat/sigpoll_codes.h"
+#include "xlat/sigprof_codes.h"
-static const struct xlat siginfo_codes[] = {
-#ifdef SI_KERNEL
- { SI_KERNEL, "SI_KERNEL" },
-#endif
-#ifdef SI_USER
- { SI_USER, "SI_USER" },
-#endif
-#ifdef SI_QUEUE
- { SI_QUEUE, "SI_QUEUE" },
-#endif
-#ifdef SI_TIMER
- { SI_TIMER, "SI_TIMER" },
-#endif
-#ifdef SI_MESGQ
- { SI_MESGQ, "SI_MESGQ" },
-#endif
-#ifdef SI_ASYNCIO
- { SI_ASYNCIO, "SI_ASYNCIO" },
-#endif
-#ifdef SI_SIGIO
- { SI_SIGIO, "SI_SIGIO" },
-#endif
-#ifdef SI_TKILL
- { SI_TKILL, "SI_TKILL" },
-#endif
-#ifdef SI_ASYNCNL
- { SI_ASYNCNL, "SI_ASYNCNL" },
-#endif
-#ifdef SI_NOINFO
- { SI_NOINFO, "SI_NOINFO" },
-#endif
-#ifdef SI_LWP
- { SI_LWP, "SI_LWP" },
+#ifdef SIGEMT
+#include "xlat/sigemt_codes.h"
#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 },
-};
+#include "xlat/sigsegv_codes.h"
+#include "xlat/sigbus_codes.h"
-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 },
-};
+#ifndef SYS_SECCOMP
+# define SYS_SECCOMP 1
#endif
+#include "xlat/sigsys_codes.h"
-static const struct xlat sigsegv_codes[] = {
- { SEGV_MAPERR, "SEGV_MAPERR" },
- { SEGV_ACCERR, "SEGV_ACCERR" },
- { 0, NULL },
-};
+static void
+printsigsource(const siginfo_t *sip)
+{
+ tprintf(", si_pid=%lu, si_uid=%lu",
+ (unsigned long) sip->si_pid,
+ (unsigned long) sip->si_uid);
+}
-static const struct xlat sigbus_codes[] = {
- { BUS_ADRALN, "BUS_ADRALN" },
- { BUS_ADRERR, "BUS_ADRERR" },
- { BUS_OBJERR, "BUS_OBJERR" },
- { 0, NULL },
-};
+static void
+printsigval(const siginfo_t *sip, int verbose)
+{
+ if (!verbose)
+ tprints(", ...");
+ else
+ tprintf(", si_value={int=%u, ptr=%#lx}",
+ sip->si_int,
+ (unsigned long) sip->si_ptr);
+}
void
printsiginfo(siginfo_t *sip, int verbose)
case SIGBUS:
code = xlookup(sigbus_codes, sip->si_code);
break;
+ case SIGSYS:
+ code = xlookup(sigsys_codes, sip->si_code);
+ break;
}
}
if (code)
}
#ifdef SI_FROMUSER
if (SI_FROMUSER(sip)) {
- tprintf(", si_pid=%lu, si_uid=%lu",
- (unsigned long) sip->si_pid,
- (unsigned long) sip->si_uid);
switch (sip->si_code) {
#ifdef SI_USER
case SI_USER:
+ printsigsource(sip);
break;
#endif
#ifdef SI_TKILL
case SI_TKILL:
+ printsigsource(sip);
break;
#endif
#ifdef SI_TIMER
case SI_TIMER:
- tprintf(", si_value=%d", sip->si_int);
+ tprintf(", si_timerid=%#x, si_overrun=%d",
+ sip->si_timerid, sip->si_overrun);
+ printsigval(sip, verbose);
break;
#endif
default:
- if (!sip->si_ptr)
- break;
- if (!verbose)
- tprints(", ...");
- else
- tprintf(", si_value={int=%u, ptr=%#lx}",
- sip->si_int,
- (unsigned long) sip->si_ptr);
+ printsigsource(sip);
+ if (sip->si_ptr)
+ printsigval(sip, verbose);
break;
}
}
{
switch (sip->si_signo) {
case SIGCHLD:
- tprintf(", si_pid=%ld, si_status=",
- (long) sip->si_pid);
+ printsigsource(sip);
+ tprints(", si_status=");
if (sip->si_code == CLD_EXITED)
tprintf("%d", sip->si_status);
else
break;
}
break;
+#ifdef HAVE_SIGINFO_T_SI_SYSCALL
+ case SIGSYS:
+ tprintf(", si_call_addr=%#lx, si_syscall=%d, si_arch=%u",
+ (unsigned long) sip->si_call_addr,
+ sip->si_syscall, sip->si_arch);
+ break;
+#endif
default:
if (sip->si_pid || sip->si_uid)
- tprintf(", si_pid=%lu, si_uid=%lu",
- (unsigned long) sip->si_pid,
- (unsigned long) sip->si_uid);
- if (!sip->si_ptr)
- break;
- if (!verbose)
- tprints(", ...");
- else {
- tprintf(", si_value={int=%u, ptr=%#lx}",
- sip->si_int,
- (unsigned long) sip->si_ptr);
- }
-
+ printsigsource(sip);
+ if (sip->si_ptr)
+ printsigval(sip, verbose);
}
}
}
tprints("}");
}
+void
+printsiginfo_at(struct tcb *tcp, long addr)
+{
+ siginfo_t si;
+ if (!addr) {
+ tprints("NULL");
+ return;
+ }
+ if (syserror(tcp)) {
+ tprintf("%#lx", addr);
+ return;
+ }
+ if (umove(tcp, addr, &si) < 0) {
+ tprints("{???}");
+ return;
+ }
+ printsiginfo(&si, verbose(tcp));
+}
+
int
sys_sigsetmask(struct tcb *tcp)
{
if (entering(tcp)) {
- sigset_t sigm;
- long_to_sigset(tcp->u_arg[0], &sigm);
- printsigmask(&sigm, 0);
+ tprintsigmask_val("", tcp->u_arg[0]);
}
else if (!syserror(tcp)) {
- sigset_t sigm;
- long_to_sigset(tcp->u_rval, &sigm);
- tcp->auxstr = sprintsigmask("old mask ", &sigm, 0);
-
+ tcp->auxstr = sprintsigmask_val("old mask ", tcp->u_rval);
return RVAL_HEX | RVAL_STR;
}
return 0;
#ifdef HAVE_SIGACTION
struct old_sigaction {
- __sighandler_t __sa_handler;
+ /* sa_handler may be a libc #define, need to use other name: */
+#ifdef MIPS
+ unsigned int sa_flags;
+ void (*__sa_handler)(int);
+ /* Kernel treats sa_mask as an array of longs. */
+ unsigned long sa_mask[NSIG / sizeof(long) ? NSIG / sizeof(long) : 1];
+#else
+ void (*__sa_handler)(int);
unsigned long sa_mask;
unsigned long sa_flags;
void (*sa_restorer)(void);
+#endif /* !MIPS */
};
-#define SA_HANDLER __sa_handler
-#ifndef SA_HANDLER
-#define SA_HANDLER sa_handler
-#endif
+struct old_sigaction32 {
+ /* sa_handler may be a libc #define, need to use other name: */
+ uint32_t __sa_handler;
+ uint32_t sa_mask;
+ uint32_t sa_flags;
+ uint32_t sa_restorer;
+};
-int
-sys_sigaction(struct tcb *tcp)
+static void
+decode_old_sigaction(struct tcb *tcp, long addr)
{
- long addr;
- sigset_t sigset;
struct old_sigaction sa;
+ int r;
- if (entering(tcp)) {
- printsignal(tcp->u_arg[0]);
- tprints(", ");
- addr = tcp->u_arg[1];
- } else
- addr = tcp->u_arg[2];
- if (addr == 0)
+ if (!addr) {
tprints("NULL");
- else if (!verbose(tcp))
+ return;
+ }
+ if (!verbose(tcp) || (exiting(tcp) && syserror(tcp))) {
tprintf("%#lx", addr);
- else if (umove(tcp, addr, &sa) < 0)
+ return;
+ }
+
+#if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
+ if (current_wordsize != sizeof(sa.__sa_handler) && current_wordsize == 4) {
+ struct old_sigaction32 sa32;
+ r = umove(tcp, addr, &sa32);
+ if (r >= 0) {
+ memset(&sa, 0, sizeof(sa));
+ sa.__sa_handler = (void*)(uintptr_t)sa32.__sa_handler;
+ sa.sa_flags = sa32.sa_flags;
+ sa.sa_restorer = (void*)(uintptr_t)sa32.sa_restorer;
+ sa.sa_mask = sa32.sa_mask;
+ }
+ } else
+#endif
+ {
+ r = umove(tcp, addr, &sa);
+ }
+ if (r < 0) {
tprints("{...}");
- else {
- /* Architectures using function pointers, like
- * hppa, may need to manipulate the function pointer
- * to compute the result of a comparison. However,
- * the SA_HANDLER function pointer exists only in
- * the address space of the traced process, and can't
- * be manipulated by strace. In order to prevent the
- * compiler from generating code to manipulate
- * SA_HANDLER we cast the function pointers to long. */
- if ((long)sa.SA_HANDLER == (long)SIG_ERR)
- tprints("{SIG_ERR, ");
- else if ((long)sa.SA_HANDLER == (long)SIG_DFL)
- tprints("{SIG_DFL, ");
- else if ((long)sa.SA_HANDLER == (long)SIG_IGN)
- tprints("{SIG_IGN, ");
- else
- tprintf("{%#lx, ", (long) sa.SA_HANDLER);
- long_to_sigset(sa.sa_mask, &sigset);
- printsigmask(&sigset, 0);
- tprints(", ");
- printflags(sigact_flags, sa.sa_flags, "SA_???");
+ return;
+ }
+
+ /* Architectures using function pointers, like
+ * hppa, may need to manipulate the function pointer
+ * to compute the result of a comparison. However,
+ * the __sa_handler function pointer exists only in
+ * the address space of the traced process, and can't
+ * be manipulated by strace. In order to prevent the
+ * compiler from generating code to manipulate
+ * __sa_handler we cast the function pointers to long. */
+ if ((long)sa.__sa_handler == (long)SIG_ERR)
+ tprints("{SIG_ERR, ");
+ else if ((long)sa.__sa_handler == (long)SIG_DFL)
+ tprints("{SIG_DFL, ");
+ else if ((long)sa.__sa_handler == (long)SIG_IGN)
+ tprints("{SIG_IGN, ");
+ else
+ tprintf("{%#lx, ", (long) sa.__sa_handler);
+#ifdef MIPS
+ tprintsigmask_addr("", sa.sa_mask);
+#else
+ tprintsigmask_val("", sa.sa_mask);
+#endif
+ tprints(", ");
+ printflags(sigact_flags, sa.sa_flags, "SA_???");
#ifdef SA_RESTORER
- if (sa.sa_flags & SA_RESTORER)
- tprintf(", %p", sa.sa_restorer);
+ if (sa.sa_flags & SA_RESTORER)
+ tprintf(", %p", sa.sa_restorer);
#endif
- tprints("}");
- }
- if (entering(tcp))
+ tprints("}");
+}
+
+int
+sys_sigaction(struct tcb *tcp)
+{
+ if (entering(tcp)) {
+ printsignal(tcp->u_arg[0]);
tprints(", ");
- else
- tprintf(", %#lx", (unsigned long) sa.sa_restorer);
+ decode_old_sigaction(tcp, tcp->u_arg[1]);
+ tprints(", ");
+ } else
+ decode_old_sigaction(tcp, tcp->u_arg[2]);
return 0;
}
{
#if defined(ARM)
if (entering(tcp)) {
- struct sigcontext_struct sc;
- sigset_t sigm;
- if (umove(tcp, regs.ARM_sp, &sc) < 0)
+ struct arm_sigcontext {
+ unsigned long trap_no;
+ unsigned long error_code;
+ unsigned long oldmask;
+ unsigned long arm_r0;
+ unsigned long arm_r1;
+ unsigned long arm_r2;
+ unsigned long arm_r3;
+ unsigned long arm_r4;
+ unsigned long arm_r5;
+ unsigned long arm_r6;
+ unsigned long arm_r7;
+ unsigned long arm_r8;
+ unsigned long arm_r9;
+ unsigned long arm_r10;
+ unsigned long arm_fp;
+ unsigned long arm_ip;
+ unsigned long arm_sp;
+ unsigned long arm_lr;
+ unsigned long arm_pc;
+ unsigned long arm_cpsr;
+ unsigned long fault_address;
+ };
+ struct arm_ucontext {
+ unsigned long uc_flags;
+ unsigned long uc_link; /* struct ucontext* */
+ /* The next three members comprise stack_t struct: */
+ unsigned long ss_sp; /* void* */
+ unsigned long ss_flags; /* int */
+ unsigned long ss_size; /* size_t */
+ struct arm_sigcontext sc;
+ /* These two members are sigset_t: */
+ unsigned long uc_sigmask[2];
+ /* more fields follow, which we aren't interested in */
+ };
+ struct arm_ucontext uc;
+ if (umove(tcp, arm_regs.ARM_sp, &uc) < 0)
return 0;
- long_to_sigset(sc.oldmask, &sigm);
- tprints(sprintsigmask(") (mask ", &sigm, 0));
+ /*
+ * Kernel fills out uc.sc.oldmask too when it sets up signal stack,
+ * but for sigmask restore, sigreturn syscall uses uc.uc_sigmask instead.
+ */
+ tprintsigmask_addr(") (mask ", uc.uc_sigmask);
}
#elif defined(S390) || defined(S390X)
if (entering(tcp)) {
long usp;
- struct sigcontext_struct sc;
- if (upeek(tcp, PT_GPR15, &usp) < 0)
+ struct sigcontext sc;
+ if (upeek(tcp->pid, PT_GPR15, &usp) < 0)
return 0;
if (umove(tcp, usp + __SIGNAL_FRAMESIZE, &sc) < 0)
return 0;
- tprints(sprintsigmask(") (mask ", (sigset_t *)&sc.oldmask[0], 0));
+ tprintsigmask_addr(") (mask ", sc.oldmask);
}
-#elif defined(I386)
+#elif defined(I386) || defined(X86_64)
+# if defined(X86_64)
+ if (current_personality == 0) /* 64-bit */
+ return 0;
+# endif
if (entering(tcp)) {
- struct sigcontext_struct sc;
- /* Note: on i386, sc is followed on stack by struct fpstate
+ struct i386_sigcontext_struct {
+ uint16_t gs, __gsh;
+ uint16_t fs, __fsh;
+ uint16_t es, __esh;
+ uint16_t ds, __dsh;
+ uint32_t edi;
+ uint32_t esi;
+ uint32_t ebp;
+ uint32_t esp;
+ uint32_t ebx;
+ uint32_t edx;
+ uint32_t ecx;
+ uint32_t eax;
+ uint32_t trapno;
+ uint32_t err;
+ uint32_t eip;
+ uint16_t cs, __csh;
+ uint32_t eflags;
+ uint32_t esp_at_signal;
+ uint16_t ss, __ssh;
+ uint32_t i387;
+ uint32_t oldmask;
+ uint32_t cr2;
+ };
+ struct i386_fpstate {
+ uint32_t cw;
+ uint32_t sw;
+ uint32_t tag;
+ uint32_t ipoff;
+ uint32_t cssel;
+ uint32_t dataoff;
+ uint32_t datasel;
+ uint8_t st[8][10]; /* 8*10 bytes: FP regs */
+ uint16_t status;
+ uint16_t magic;
+ uint32_t fxsr_env[6];
+ uint32_t mxcsr;
+ uint32_t reserved;
+ uint8_t stx[8][16]; /* 8*16 bytes: FP regs, each padded to 16 bytes */
+ uint8_t xmm[8][16]; /* 8 XMM regs */
+ uint32_t padding1[44];
+ uint32_t padding2[12]; /* union with struct _fpx_sw_bytes */
+ };
+ struct {
+ struct i386_sigcontext_struct sc;
+ struct i386_fpstate fp;
+ uint32_t extramask[1];
+ } signal_stack;
+ /* On i386, sc is followed on stack by struct fpstate
* and after it an additional u32 extramask[1] which holds
- * upper half of the mask. We can fetch it there
- * if/when we'd want to display the full mask...
+ * upper half of the mask.
*/
- sigset_t sigm;
- if (umove(tcp, i386_regs.esp, &sc) < 0)
+ uint32_t sigmask[2];
+ if (umove(tcp, *i386_esp_ptr, &signal_stack) < 0)
return 0;
- long_to_sigset(sc.oldmask, &sigm);
- tprints(sprintsigmask(") (mask ", &sigm, 0));
+ sigmask[0] = signal_stack.sc.oldmask;
+ sigmask[1] = signal_stack.extramask[0];
+ tprintsigmask_addr(") (mask ", sigmask);
}
#elif defined(IA64)
if (entering(tcp)) {
struct sigcontext sc;
long sp;
- sigset_t sigm;
/* offset of sigcontext in the kernel's sigframe structure: */
# define SIGFRAME_SC_OFFSET 0x90
- if (upeek(tcp, PT_R12, &sp) < 0)
+ if (upeek(tcp->pid, PT_R12, &sp) < 0)
return 0;
if (umove(tcp, sp + 16 + SIGFRAME_SC_OFFSET, &sc) < 0)
return 0;
- sigemptyset(&sigm);
- memcpy(&sigm, &sc.sc_mask, NSIG / 8);
- tprints(sprintsigmask(") (mask ", &sigm, 0));
+ tprintsigmask_val(") (mask ", sc.sc_mask);
}
#elif defined(POWERPC)
if (entering(tcp)) {
long esp;
- struct sigcontext_struct sc;
- sigset_t sigm;
- if (upeek(tcp, sizeof(unsigned long) * PT_R1, &esp) < 0)
- return 0;
+ struct sigcontext sc;
+
+ esp = ppc_regs.gpr[1];
+
/* Skip dummy stack frame. */
#ifdef POWERPC64
if (current_personality == 0)
#endif
if (umove(tcp, esp, &sc) < 0)
return 0;
- long_to_sigset(sc.oldmask, &sigm);
- tprints(sprintsigmask(") (mask ", &sigm, 0));
+ tprintsigmask_val(") (mask ", sc.oldmask);
}
#elif defined(M68K)
if (entering(tcp)) {
long usp;
struct sigcontext sc;
- sigset_t sigm;
- if (upeek(tcp, 4*PT_USP, &usp) < 0)
+ if (upeek(tcp->pid, 4*PT_USP, &usp) < 0)
return 0;
if (umove(tcp, usp, &sc) < 0)
return 0;
- long_to_sigset(sc.sc_mask, &sigm);
- tprints(sprintsigmask(") (mask ", &sigm, 0));
+ tprintsigmask_val(") (mask ", sc.sc_mask);
}
#elif defined(ALPHA)
if (entering(tcp)) {
long fp;
- struct sigcontext_struct sc;
- sigset_t sigm;
- if (upeek(tcp, REG_FP, &fp) < 0)
+ struct sigcontext sc;
+ if (upeek(tcp->pid, REG_FP, &fp) < 0)
return 0;
if (umove(tcp, fp, &sc) < 0)
return 0;
- long_to_sigset(sc.sc_mask, &sigm);
- tprints(sprintsigmask(") (mask ", &sigm, 0));
+ tprintsigmask_val(") (mask ", sc.sc_mask);
}
#elif defined(SPARC) || defined(SPARC64)
if (entering(tcp)) {
long i1;
m_siginfo_t si;
- sigset_t sigm;
- i1 = regs.u_regs[U_REG_O1];
+ i1 = sparc_regs.u_regs[U_REG_O1];
if (umove(tcp, i1, &si) < 0) {
- perror_msg("%s", "sigreturn: umove");
+ perror_msg("sigreturn: umove");
return 0;
}
- long_to_sigset(si.si_mask, &sigm);
- tprints(sprintsigmask(") (mask ", &sigm, 0));
+ tprintsigmask_val(") (mask ", si.si_mask);
}
#elif defined(LINUX_MIPSN32) || defined(LINUX_MIPSN64)
/* This decodes rt_sigreturn. The 64-bit ABIs do not have
if (entering(tcp)) {
long sp;
struct ucontext uc;
- sigset_t sigm;
- if (upeek(tcp, REG_SP, &sp) < 0)
+ if (upeek(tcp->pid, REG_SP, &sp) < 0)
return 0;
/* There are six words followed by a 128-byte siginfo. */
sp = sp + 6 * 4 + 128;
if (umove(tcp, sp, &uc) < 0)
return 0;
- long_to_sigset(*(long *) &uc.uc_sigmask, &sigm);
- tprints(sprintsigmask(") (mask ", &sigm, 0));
+ tprintsigmask_val(") (mask ", uc.uc_sigmask);
}
#elif defined(MIPS)
if (entering(tcp)) {
long sp;
struct pt_regs regs;
m_siginfo_t si;
- sigset_t sigm;
if (ptrace(PTRACE_GETREGS, tcp->pid, (char *)®s, 0) < 0) {
- perror_msg("%s", "sigreturn: PTRACE_GETREGS");
+ perror_msg("sigreturn: PTRACE_GETREGS");
return 0;
}
sp = regs.regs[29];
if (umove(tcp, sp, &si) < 0)
return 0;
- long_to_sigset(si.si_mask, &sigm);
- tprints(sprintsigmask(") (mask ", &sigm, 0));
+ tprintsigmask_val(") (mask ", si.si_mask);
}
#elif defined(CRISV10) || defined(CRISV32)
if (entering(tcp)) {
struct sigcontext sc;
long regs[PT_MAX+1];
- sigset_t sigm;
if (ptrace(PTRACE_GETREGS, tcp->pid, NULL, (long)regs) < 0) {
- perror_msg("%s", "sigreturn: PTRACE_GETREGS");
+ perror_msg("sigreturn: PTRACE_GETREGS");
return 0;
}
if (umove(tcp, regs[PT_USP], &sc) < 0)
return 0;
- long_to_sigset(sc.oldmask, &sigm);
- tprints(sprintsigmask(") (mask ", &sigm, 0));
+ tprintsigmask_val(") (mask ", sc.oldmask);
}
#elif defined(TILE)
if (entering(tcp)) {
struct ucontext uc;
- sigset_t sigm;
/* offset of ucontext in the kernel's sigframe structure */
-# define SIGFRAME_UC_OFFSET C_ABI_SAVE_AREA_SIZE + sizeof(struct siginfo)
+# define SIGFRAME_UC_OFFSET C_ABI_SAVE_AREA_SIZE + sizeof(siginfo_t)
if (umove(tcp, tile_regs.sp + SIGFRAME_UC_OFFSET, &uc) < 0)
return 0;
- sigemptyset(&sigm);
- memcpy(&sigm, &uc.uc_sigmask, NSIG / 8);
- tprints(sprintsigmask(") (mask ", &sigm, 0));
+ tprintsigmask_val(") (mask ", uc.uc_sigmask);
}
#elif defined(MICROBLAZE)
/* TODO: Verify that this is correct... */
if (entering(tcp)) {
struct sigcontext sc;
long sp;
- sigset_t sigm;
/* Read r1, the stack pointer. */
- if (upeek(tcp, 1 * 4, &sp) < 0)
+ if (upeek(tcp->pid, 1 * 4, &sp) < 0)
return 0;
if (umove(tcp, sp, &sc) < 0)
return 0;
- long_to_sigset(sc.oldmask, &sigm);
- tprints(sprintsigmask(") (mask ", &sigm, 0));
+ tprintsigmask_val(") (mask ", sc.oldmask);
}
-#elif defined(X86_64)
- /* no need to remind */
+#elif defined(XTENSA)
+ /* Xtensa only has rt_sys_sigreturn */
+#elif defined(ARC)
+ /* ARC syscall ABI only supports rt_sys_sigreturn */
#else
# warning No sys_sigreturn() for this architecture
# warning (no problem, just a reminder :-)
sys_siggetmask(struct tcb *tcp)
{
if (exiting(tcp)) {
- sigset_t sigm;
- long_to_sigset(tcp->u_rval, &sigm);
- tcp->auxstr = sprintsigmask("mask ", &sigm, 0);
+ tcp->auxstr = sprintsigmask_val("mask ", tcp->u_rval);
}
return RVAL_HEX | RVAL_STR;
}
sys_sigsuspend(struct tcb *tcp)
{
if (entering(tcp)) {
- sigset_t sigm;
- long_to_sigset(tcp->u_arg[2], &sigm);
- printsigmask(&sigm, 0);
+ tprintsigmask_val("", tcp->u_arg[2]);
}
return 0;
}
#if !defined SS_ONSTACK
#define SS_ONSTACK 1
#define SS_DISABLE 2
-#if defined(__GLIBC__) && (__GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 1))
-typedef struct
-{
- __ptr_t ss_sp;
- int ss_flags;
- size_t ss_size;
-} stack_t;
-#endif
#endif
-static const struct xlat sigaltstack_flags[] = {
- { SS_ONSTACK, "SS_ONSTACK" },
- { SS_DISABLE, "SS_DISABLE" },
- { 0, NULL },
-};
+#include "xlat/sigaltstack_flags.h"
-static int
+static void
print_stack_t(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);
- printflags(sigaltstack_flags, ss.ss_flags, "SS_???");
- tprintf(", ss_size=%lu}", (unsigned long) ss.ss_size);
- return 0;
+ int r;
+
+ if (!addr) {
+ tprints("NULL");
+ return;
+ }
+
+#if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
+ if (current_wordsize != sizeof(ss.ss_sp) && current_wordsize == 4) {
+ struct {
+ uint32_t ss_sp;
+ int32_t ss_flags;
+ uint32_t ss_size;
+ } ss32;
+ r = umove(tcp, addr, &ss32);
+ if (r >= 0) {
+ memset(&ss, 0, sizeof(ss));
+ ss.ss_sp = (void*)(unsigned long) ss32.ss_sp;
+ ss.ss_flags = ss32.ss_flags;
+ ss.ss_size = (unsigned long) ss32.ss_size;
+ }
+ } else
+#endif
+ {
+ r = umove(tcp, addr, &ss);
+ }
+ if (r < 0) {
+ tprintf("%#lx", addr);
+ } else {
+ tprintf("{ss_sp=%#lx, ss_flags=", (unsigned long) ss.ss_sp);
+ printflags(sigaltstack_flags, ss.ss_flags, "SS_???");
+ tprintf(", ss_size=%lu}", (unsigned long) ss.ss_size);
+ }
}
int
sys_sigaltstack(struct tcb *tcp)
{
if (entering(tcp)) {
- if (tcp->u_arg[0] == 0)
- tprints("NULL");
- else if (print_stack_t(tcp, tcp->u_arg[0]) < 0)
- return -1;
+ print_stack_t(tcp, tcp->u_arg[0]);
}
else {
tprints(", ");
- if (tcp->u_arg[1] == 0)
- tprints("NULL");
- else if (print_stack_t(tcp, tcp->u_arg[1]) < 0)
- return -1;
+ print_stack_t(tcp, tcp->u_arg[1]);
}
return 0;
}
#ifdef HAVE_SIGACTION
+/* "Old" sigprocmask, which operates with word-sized signal masks */
int
sys_sigprocmask(struct tcb *tcp)
{
-#ifdef ALPHA
- sigset_t ss;
+# ifdef ALPHA
if (entering(tcp)) {
/*
* Alpha/OSF is different: it doesn't pass in two pointers,
* Everyone else:
* ret = sigprocmask(how, &new, &old, ...);
*/
- memcpy(&ss, &tcp->u_arg[1], sizeof(long));
printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
- tprints(", ");
- printsigmask(&ss, 0);
+ tprintsigmask_val(", ", tcp->u_arg[1]);
}
else if (!syserror(tcp)) {
- memcpy(&ss, &tcp->u_rval, sizeof(long));
- tcp->auxstr = sprintsigmask("old mask ", &ss, 0);
+ tcp->auxstr = sprintsigmask_val("old mask ", tcp->u_rval);
return RVAL_HEX | RVAL_STR;
}
-#else /* !ALPHA */
+# else /* !ALPHA */
if (entering(tcp)) {
printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
tprints(", ");
- print_sigset(tcp, tcp->u_arg[1], 0);
+ print_sigset_addr_len(tcp, tcp->u_arg[1], current_wordsize);
tprints(", ");
}
else {
- if (!tcp->u_arg[2])
- tprints("NULL");
- else if (syserror(tcp))
+ if (syserror(tcp))
tprintf("%#lx", tcp->u_arg[2]);
else
- print_sigset(tcp, tcp->u_arg[2], 0);
+ print_sigset_addr_len(tcp, tcp->u_arg[2], current_wordsize);
}
-#endif /* !ALPHA */
+# endif /* !ALPHA */
return 0;
}
sys_kill(struct tcb *tcp)
{
if (entering(tcp)) {
- long pid = tcp->u_arg[0];
-#if SUPPORTED_PERSONALITIES > 1
- /* Sign-extend a 32-bit value when that's what it is. */
- if (current_wordsize < sizeof pid)
- pid = (long) (int) pid;
-#endif
- tprintf("%ld, %s", pid, signame(tcp->u_arg[1]));
+ tprintf("%ld, %s",
+ widen_to_long(tcp->u_arg[0]),
+ signame(tcp->u_arg[1])
+ );
}
return 0;
}
{
if (entering(tcp)) {
tprintf("%ld, %ld, %s",
- tcp->u_arg[0], tcp->u_arg[1], signame(tcp->u_arg[2]));
+ widen_to_long(tcp->u_arg[0]),
+ widen_to_long(tcp->u_arg[1]),
+ signame(tcp->u_arg[2])
+ );
}
return 0;
}
int
sys_sigpending(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)
- tprints("[?]");
else
- printsigmask(&sigset, 0);
+ print_sigset_addr_len(tcp, tcp->u_arg[0], current_wordsize);
}
return 0;
}
int
sys_rt_sigprocmask(struct tcb *tcp)
{
- sigset_t sigset;
-
- /* Note: arg[3] is the length of the sigset. */
+ /* Note: arg[3] is the length of the sigset. Kernel requires NSIG / 8 */
if (entering(tcp)) {
printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???");
tprints(", ");
- if (!tcp->u_arg[1])
- tprints("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);
- tprints(", ");
- }
+ print_sigset_addr_len(tcp, tcp->u_arg[1], tcp->u_arg[3]);
+ tprints(", ");
}
else {
- if (!tcp->u_arg[2])
- tprints("NULL");
- else if (syserror(tcp))
+ 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)
- tprints("[?]");
else
- printsigmask(&sigset, 1);
+ print_sigset_addr_len(tcp, tcp->u_arg[2], tcp->u_arg[3]);
tprintf(", %lu", tcp->u_arg[3]);
}
return 0;
/* Structure describing the action to be taken when a signal arrives. */
struct new_sigaction
{
- __sighandler_t __sa_handler;
+ /* sa_handler may be a libc #define, need to use other name: */
+#ifdef MIPS
+ unsigned int sa_flags;
+ void (*__sa_handler)(int);
+#else
+ void (*__sa_handler)(int);
unsigned long sa_flags;
- void (*sa_restorer) (void);
+ void (*sa_restorer)(void);
+#endif /* !MIPS */
/* Kernel treats sa_mask as an array of longs. */
unsigned long sa_mask[NSIG / sizeof(long) ? NSIG / sizeof(long) : 1];
};
uint32_t sa_mask[2 * (NSIG / sizeof(long) ? NSIG / sizeof(long) : 1)];
};
-int
-sys_rt_sigaction(struct tcb *tcp)
+static void
+decode_new_sigaction(struct tcb *tcp, long addr)
{
struct new_sigaction sa;
- sigset_t sigset;
- long addr;
int r;
- if (entering(tcp)) {
- printsignal(tcp->u_arg[0]);
- tprints(", ");
- addr = tcp->u_arg[1];
- } else
- addr = tcp->u_arg[2];
-
- if (addr == 0) {
+ if (!addr) {
tprints("NULL");
- goto after_sa;
+ return;
}
- if (!verbose(tcp)) {
+ if (!verbose(tcp) || (exiting(tcp) && syserror(tcp))) {
tprintf("%#lx", addr);
- goto after_sa;
+ return;
}
-#if SUPPORTED_PERSONALITIES > 1
-#if SIZEOF_LONG > 4
+#if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
if (current_wordsize != sizeof(sa.sa_flags) && current_wordsize == 4) {
struct new_sigaction32 sa32;
r = umove(tcp, addr, &sa32);
sa.sa_mask[0] = sa32.sa_mask[0] + ((long)(sa32.sa_mask[1]) << 32);
}
} else
-#endif
#endif
{
r = umove(tcp, addr, &sa);
}
if (r < 0) {
tprints("{...}");
- goto after_sa;
+ return;
}
/* Architectures using function pointers, like
* hppa, may need to manipulate the function pointer
* to compute the result of a comparison. However,
- * the SA_HANDLER function pointer exists only in
+ * the __sa_handler function pointer exists only in
* the address space of the traced process, and can't
* be manipulated by strace. In order to prevent the
* compiler from generating code to manipulate
- * SA_HANDLER we cast the function pointers to long. */
+ * __sa_handler we cast the function pointers to long. */
if ((long)sa.__sa_handler == (long)SIG_ERR)
tprints("{SIG_ERR, ");
else if ((long)sa.__sa_handler == (long)SIG_DFL)
tprints("{SIG_IGN, ");
else
tprintf("{%#lx, ", (long) sa.__sa_handler);
- /* Questionable code below.
- * Kernel won't handle sys_rt_sigaction
- * with wrong sigset size (just returns EINVAL)
- * therefore tcp->u_arg[3(4)] _must_ be NSIG / 8 here,
- * and we always use smaller memcpy. */
- 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);
+ /*
+ * Sigset size is in tcp->u_arg[4] (SPARC)
+ * or in tcp->u_arg[3] (all other),
+ * but kernel won't handle sys_rt_sigaction
+ * with wrong sigset size (just returns EINVAL instead).
+ * We just fetch the right size, which is NSIG / 8.
+ */
+ tprintsigmask_val("", sa.sa_mask);
tprints(", ");
+
printflags(sigact_flags, sa.sa_flags, "SA_???");
#ifdef SA_RESTORER
if (sa.sa_flags & SA_RESTORER)
tprintf(", %p", sa.sa_restorer);
#endif
tprints("}");
+}
- after_sa:
- if (entering(tcp))
+int
+sys_rt_sigaction(struct tcb *tcp)
+{
+ if (entering(tcp)) {
+ printsignal(tcp->u_arg[0]);
tprints(", ");
- else
-#ifdef LINUXSPARC
+ decode_new_sigaction(tcp, tcp->u_arg[1]);
+ tprints(", ");
+ } else {
+ decode_new_sigaction(tcp, tcp->u_arg[2]);
+#if defined(SPARC) || defined(SPARC64)
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", tcp->u_arg[3]);
#endif
+ }
return 0;
}
int
sys_rt_sigpending(struct tcb *tcp)
{
- sigset_t sigset;
-
if (exiting(tcp)) {
+ /*
+ * One of the few syscalls where sigset size (arg[1])
+ * is allowed to be <= NSIG / 8, not strictly ==.
+ * This allows non-rt sigpending() syscall
+ * to reuse rt_sigpending() code in kernel.
+ */
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)
- tprints("[?]");
else
- printsigmask(&sigset, 1);
+ print_sigset_addr_len(tcp, tcp->u_arg[0], tcp->u_arg[1]);
+ tprintf(", %lu", tcp->u_arg[1]);
}
return 0;
}
sys_rt_sigsuspend(struct tcb *tcp)
{
if (entering(tcp)) {
- sigset_t sigm;
- if (copy_sigset_len(tcp, tcp->u_arg[0], &sigm, tcp->u_arg[1]) < 0)
- tprints("[?]");
- else
- printsigmask(&sigm, 1);
+ /* NB: kernel requires arg[1] == NSIG / 8 */
+ print_sigset_addr_len(tcp, tcp->u_arg[0], tcp->u_arg[1]);
+ tprintf(", %lu", tcp->u_arg[1]);
}
return 0;
}
static void
print_sigqueueinfo(struct tcb *tcp, int sig, unsigned long uinfo)
{
- siginfo_t si;
-
printsignal(sig);
tprints(", ");
- if (umove(tcp, uinfo, &si) < 0)
- tprintf("%#lx", uinfo);
- else
- printsiginfo(&si, verbose(tcp));
+ printsiginfo_at(tcp, uinfo);
}
int
int sys_rt_sigtimedwait(struct tcb *tcp)
{
+ /* NB: kernel requires arg[3] == NSIG / 8 */
if (entering(tcp)) {
- sigset_t sigset;
-
- if (copy_sigset_len(tcp, tcp->u_arg[0],
- &sigset, tcp->u_arg[3]) < 0)
- tprints("[?]");
- else
- printsigmask(&sigset, 1);
+ print_sigset_addr_len(tcp, tcp->u_arg[0], tcp->u_arg[3]);
tprints(", ");
/* This is the only "return" parameter, */
if (tcp->u_arg[1] != 0)
}
else if (tcp->u_arg[1] != 0) {
/* syscall exit, and u_arg[1] wasn't NULL */
- if (syserror(tcp))
- tprintf("%#lx, ", tcp->u_arg[1]);
- else {
- siginfo_t si;
- if (umove(tcp, tcp->u_arg[1], &si) < 0)
- tprintf("%#lx, ", tcp->u_arg[1]);
- else {
- printsiginfo(&si, verbose(tcp));
- tprints(", ");
- }
- }
+ printsiginfo_at(tcp, tcp->u_arg[1]);
+ tprints(", ");
}
else {
/* syscall exit, and u_arg[1] was NULL */
return 0;
}
print_timespec(tcp, tcp->u_arg[2]);
- tprintf(", %d", (int) tcp->u_arg[3]);
+ tprintf(", %lu", tcp->u_arg[3]);
return 0;
};
static int
do_signalfd(struct tcb *tcp, int flags_arg)
{
+ /* NB: kernel requires arg[2] == NSIG / 8 */
if (entering(tcp)) {
printfd(tcp, tcp->u_arg[0]);
tprints(", ");
- print_sigset(tcp, tcp->u_arg[1], 1);
+ print_sigset_addr_len(tcp, tcp->u_arg[1], tcp->u_arg[2]);
tprintf(", %lu", tcp->u_arg[2]);
if (flags_arg >= 0) {
tprints(", ");