| /* |
| * 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. |
| */ |
| |
| #include "defs.h" |
| #include <sys/user.h> |
| #include <fcntl.h> |
| |
| #ifdef HAVE_SYS_REG_H |
| # include <sys/reg.h> |
| #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 |
| # 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 |
| |
| #ifdef IA64 |
| # include <asm/ptrace_offsets.h> |
| #endif |
| |
| #if defined(SPARC) || defined(SPARC64) || defined(MIPS) |
| typedef struct { |
| struct pt_regs si_regs; |
| int si_mask; |
| } m_siginfo_t; |
| #elif defined HAVE_ASM_SIGCONTEXT_H |
| # if !defined(IA64) && !defined(X86_64) && !defined(X32) |
| # include <asm/sigcontext.h> |
| # endif |
| #else /* !HAVE_ASM_SIGCONTEXT_H */ |
| # if defined M68K && !defined HAVE_STRUCT_SIGCONTEXT |
| 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 /* !HAVE_ASM_SIGCONTEXT_H */ |
| |
| #ifndef NSIG |
| # warning: NSIG is not defined, using 32 |
| # define NSIG 32 |
| #elif NSIG < 32 |
| # error: NSIG < 32 |
| #endif |
| |
| #ifdef HAVE_SIGACTION |
| |
| /* 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 |
| # ifdef ASM_SA_RESTORER |
| # define SA_RESTORER ASM_SA_RESTORER |
| # endif |
| #endif |
| |
| #include "xlat/sigact_flags.h" |
| #include "xlat/sigprocmaskcmds.h" |
| |
| #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 |
| |
| /* Note on the size of sigset_t: |
| * |
| * In glibc, sigset_t is an array with space for 1024 bits (!), |
| * even though all arches supported by Linux have only 64 signals |
| * except MIPS, which has 128. IOW, it is 128 bytes long. |
| * |
| * In-kernel sigset_t is sized correctly (it is either 64 or 128 bit long). |
| * However, some old syscall return only 32 lower bits (one word). |
| * Example: sys_sigpending vs sys_rt_sigpending. |
| * |
| * Be aware of this fact when you try to |
| * memcpy(&tcp->u_arg[1], &something, sizeof(sigset_t)) |
| * - sizeof(sigset_t) is much bigger than you think, |
| * it may overflow tcp->u_arg[] array, and it may try to copy more data |
| * than is really available in <something>. |
| * Similarly, |
| * umoven(tcp, addr, sizeof(sigset_t), &sigset) |
| * may be a bad idea: it'll try to read much more data than needed |
| * to fetch a sigset_t. |
| * Use (NSIG / 8) as a size instead. |
| */ |
| |
| const char * |
| signame(int sig) |
| { |
| static char buf[sizeof("SIGRT_%d") + sizeof(int)*3]; |
| |
| if (sig >= 0 && sig < nsignals) |
| return signalent[sig]; |
| #ifdef SIGRTMIN |
| if (sig >= __SIGRTMIN && sig <= __SIGRTMAX) { |
| sprintf(buf, "SIGRT_%d", (int)(sig - __SIGRTMIN)); |
| return buf; |
| } |
| #endif |
| sprintf(buf, "%d", sig); |
| return buf; |
| } |
| |
| static unsigned int |
| popcount32(const uint32_t *a, unsigned int size) |
| { |
| unsigned int count = 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 |
| } |
| |
| return count; |
| } |
| |
| static const char * |
| sprintsigmask_n(const char *prefix, const void *sig_mask, unsigned int bytes) |
| { |
| /* |
| * 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[128 + 8 * (NSIG * 2 / 3)]; |
| |
| char *s; |
| const uint32_t *mask; |
| uint32_t inverted_mask[NSIG / 32]; |
| unsigned int size; |
| int i; |
| char sep; |
| |
| s = stpcpy(outstr, prefix); |
| |
| 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 = 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) { |
| s += sprintf(s, "RT_%u", i - __SIGRTMIN); |
| } |
| #endif |
| else { |
| s += sprintf(s, "%u", i); |
| } |
| sep = ' '; |
| } |
| if (sep == '[') |
| *s++ = sep; |
| *s++ = ']'; |
| *s = '\0'; |
| return outstr; |
| } |
| |
| #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) |
| { |
| tprints(signame(nr)); |
| } |
| |
| void |
| print_sigset_addr_len(struct tcb *tcp, long addr, long len) |
| { |
| char mask[NSIG / 8]; |
| |
| if (!addr) { |
| tprints("NULL"); |
| 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 |
| len = (len + 3) & ~3; |
| |
| if (umoven(tcp, addr, len, mask) < 0) |
| goto bad; |
| tprints(sprintsigmask_n("", mask, len)); |
| } |
| |
| #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 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 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_KERNEL 0x80 /* sent by kernel */ |
| #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 */ |
| #define SI_DETHREAD -7 /* sent by execve killing subsidiary threads */ |
| #define SI_ASYNCNL -60 /* sent by asynch name lookup completion */ |
| #endif |
| |
| #ifndef SI_FROMUSER |
| # define SI_FROMUSER(sip) ((sip)->si_code <= 0) |
| #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" |
| |
| #ifdef SIGEMT |
| #include "xlat/sigemt_codes.h" |
| #endif |
| |
| #include "xlat/sigsegv_codes.h" |
| #include "xlat/sigbus_codes.h" |
| |
| #ifndef SYS_SECCOMP |
| # define SYS_SECCOMP 1 |
| #endif |
| #include "xlat/sigsys_codes.h" |
| |
| 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 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) |
| { |
| const char *code; |
| |
| if (sip->si_signo == 0) { |
| tprints("{}"); |
| return; |
| } |
| tprints("{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; |
| case SIGSYS: |
| code = xlookup(sigsys_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)) { |
| 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_timerid=%#x, si_overrun=%d", |
| sip->si_timerid, sip->si_overrun); |
| printsigval(sip, verbose); |
| break; |
| #endif |
| default: |
| printsigsource(sip); |
| if (sip->si_ptr) |
| printsigval(sip, verbose); |
| break; |
| } |
| } |
| else |
| #endif /* SI_FROMUSER */ |
| { |
| switch (sip->si_signo) { |
| case SIGCHLD: |
| printsigsource(sip); |
| tprints(", si_status="); |
| if (sip->si_code == CLD_EXITED) |
| tprintf("%d", sip->si_status); |
| else |
| printsignal(sip->si_status); |
| if (!verbose) |
| tprints(", ..."); |
| else |
| tprintf(", si_utime=%llu, si_stime=%llu", |
| (unsigned long long) sip->si_utime, |
| (unsigned long long) sip->si_stime); |
| 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 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) |
| 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)) { |
| tprintsigmask_val("", tcp->u_arg[0]); |
| } |
| else if (!syserror(tcp)) { |
| tcp->auxstr = sprintsigmask_val("old mask ", tcp->u_rval); |
| return RVAL_HEX | RVAL_STR; |
| } |
| return 0; |
| } |
| |
| #ifdef HAVE_SIGACTION |
| |
| struct old_sigaction { |
| /* 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 */ |
| }; |
| |
| 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; |
| }; |
| |
| static void |
| decode_old_sigaction(struct tcb *tcp, long addr) |
| { |
| struct old_sigaction sa; |
| int r; |
| |
| if (!addr) { |
| tprints("NULL"); |
| return; |
| } |
| if (!verbose(tcp) || (exiting(tcp) && syserror(tcp))) { |
| tprintf("%#lx", addr); |
| 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("{...}"); |
| 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); |
| #endif |
| tprints("}"); |
| } |
| |
| int |
| sys_sigaction(struct tcb *tcp) |
| { |
| if (entering(tcp)) { |
| printsignal(tcp->u_arg[0]); |
| tprints(", "); |
| decode_old_sigaction(tcp, tcp->u_arg[1]); |
| tprints(", "); |
| } else |
| decode_old_sigaction(tcp, tcp->u_arg[2]); |
| return 0; |
| } |
| |
| int |
| sys_signal(struct tcb *tcp) |
| { |
| if (entering(tcp)) { |
| printsignal(tcp->u_arg[0]); |
| tprints(", "); |
| switch (tcp->u_arg[1]) { |
| case (long) SIG_ERR: |
| tprints("SIG_ERR"); |
| break; |
| case (long) SIG_DFL: |
| tprints("SIG_DFL"); |
| break; |
| case (long) SIG_IGN: |
| tprints("SIG_IGN"); |
| break; |
| default: |
| tprintf("%#lx", tcp->u_arg[1]); |
| } |
| return 0; |
| } |
| else if (!syserror(tcp)) { |
| switch (tcp->u_rval) { |
| case (long) SIG_ERR: |
| tcp->auxstr = "SIG_ERR"; break; |
| case (long) SIG_DFL: |
| tcp->auxstr = "SIG_DFL"; break; |
| case (long) SIG_IGN: |
| tcp->auxstr = "SIG_IGN"; break; |
| default: |
| tcp->auxstr = NULL; |
| } |
| return RVAL_HEX | RVAL_STR; |
| } |
| return 0; |
| } |
| |
| #endif /* HAVE_SIGACTION */ |
| |
| int |
| sys_sigreturn(struct tcb *tcp) |
| { |
| #if defined(ARM) |
| if (entering(tcp)) { |
| 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; |
| /* |
| * 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 sc; |
| if (upeek(tcp->pid, PT_GPR15, &usp) < 0) |
| return 0; |
| if (umove(tcp, usp + __SIGNAL_FRAMESIZE, &sc) < 0) |
| return 0; |
| tprintsigmask_addr(") (mask ", sc.oldmask); |
| } |
| #elif defined(I386) || defined(X86_64) |
| # if defined(X86_64) |
| if (current_personality == 0) /* 64-bit */ |
| return 0; |
| # endif |
| if (entering(tcp)) { |
| 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. |
| */ |
| uint32_t sigmask[2]; |
| if (umove(tcp, *i386_esp_ptr, &signal_stack) < 0) |
| return 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; |
| /* offset of sigcontext in the kernel's sigframe structure: */ |
| # define SIGFRAME_SC_OFFSET 0x90 |
| if (upeek(tcp->pid, PT_R12, &sp) < 0) |
| return 0; |
| if (umove(tcp, sp + 16 + SIGFRAME_SC_OFFSET, &sc) < 0) |
| return 0; |
| tprintsigmask_val(") (mask ", sc.sc_mask); |
| } |
| #elif defined(POWERPC) |
| if (entering(tcp)) { |
| long esp; |
| struct sigcontext sc; |
| |
| esp = ppc_regs.gpr[1]; |
| |
| /* Skip dummy stack frame. */ |
| #ifdef POWERPC64 |
| if (current_personality == 0) |
| esp += 128; |
| else |
| esp += 64; |
| #else |
| esp += 64; |
| #endif |
| if (umove(tcp, esp, &sc) < 0) |
| return 0; |
| tprintsigmask_val(") (mask ", sc.oldmask); |
| } |
| #elif defined(M68K) |
| if (entering(tcp)) { |
| long usp; |
| struct sigcontext sc; |
| if (upeek(tcp->pid, 4*PT_USP, &usp) < 0) |
| return 0; |
| if (umove(tcp, usp, &sc) < 0) |
| return 0; |
| tprintsigmask_val(") (mask ", sc.sc_mask); |
| } |
| #elif defined(ALPHA) |
| if (entering(tcp)) { |
| long fp; |
| struct sigcontext sc; |
| if (upeek(tcp->pid, REG_FP, &fp) < 0) |
| return 0; |
| if (umove(tcp, fp, &sc) < 0) |
| return 0; |
| tprintsigmask_val(") (mask ", sc.sc_mask); |
| } |
| #elif defined(SPARC) || defined(SPARC64) |
| if (entering(tcp)) { |
| long i1; |
| m_siginfo_t si; |
| i1 = sparc_regs.u_regs[U_REG_O1]; |
| if (umove(tcp, i1, &si) < 0) { |
| perror_msg("sigreturn: umove"); |
| return 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 |
| sigreturn. */ |
| if (entering(tcp)) { |
| long sp; |
| struct ucontext uc; |
| 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; |
| tprintsigmask_val(") (mask ", uc.uc_sigmask); |
| } |
| #elif defined(MIPS) |
| if (entering(tcp)) { |
| long sp; |
| struct pt_regs regs; |
| m_siginfo_t si; |
| if (ptrace(PTRACE_GETREGS, tcp->pid, (char *)®s, 0) < 0) { |
| perror_msg("sigreturn: PTRACE_GETREGS"); |
| return 0; |
| } |
| sp = regs.regs[29]; |
| if (umove(tcp, sp, &si) < 0) |
| return 0; |
| tprintsigmask_val(") (mask ", si.si_mask); |
| } |
| #elif defined(CRISV10) || defined(CRISV32) |
| if (entering(tcp)) { |
| struct sigcontext sc; |
| long regs[PT_MAX+1]; |
| if (ptrace(PTRACE_GETREGS, tcp->pid, NULL, (long)regs) < 0) { |
| perror_msg("sigreturn: PTRACE_GETREGS"); |
| return 0; |
| } |
| if (umove(tcp, regs[PT_USP], &sc) < 0) |
| return 0; |
| tprintsigmask_val(") (mask ", sc.oldmask); |
| } |
| #elif defined(TILE) |
| if (entering(tcp)) { |
| struct ucontext uc; |
| |
| /* offset of ucontext in the kernel's sigframe structure */ |
| # 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; |
| tprintsigmask_val(") (mask ", uc.uc_sigmask); |
| } |
| #elif defined(MICROBLAZE) |
| /* TODO: Verify that this is correct... */ |
| if (entering(tcp)) { |
| struct sigcontext sc; |
| long sp; |
| /* Read r1, the stack pointer. */ |
| if (upeek(tcp->pid, 1 * 4, &sp) < 0) |
| return 0; |
| if (umove(tcp, sp, &sc) < 0) |
| return 0; |
| tprintsigmask_val(") (mask ", sc.oldmask); |
| } |
| #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 :-) |
| #endif |
| return 0; |
| } |
| |
| int |
| sys_siggetmask(struct tcb *tcp) |
| { |
| if (exiting(tcp)) { |
| tcp->auxstr = sprintsigmask_val("mask ", tcp->u_rval); |
| } |
| return RVAL_HEX | RVAL_STR; |
| } |
| |
| int |
| sys_sigsuspend(struct tcb *tcp) |
| { |
| if (entering(tcp)) { |
| tprintsigmask_val("", tcp->u_arg[2]); |
| } |
| return 0; |
| } |
| |
| #if !defined SS_ONSTACK |
| #define SS_ONSTACK 1 |
| #define SS_DISABLE 2 |
| #endif |
| |
| #include "xlat/sigaltstack_flags.h" |
| |
| static void |
| print_stack_t(struct tcb *tcp, unsigned long addr) |
| { |
| stack_t ss; |
| 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)) { |
| print_stack_t(tcp, tcp->u_arg[0]); |
| } |
| else { |
| tprints(", "); |
| 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 |
| if (entering(tcp)) { |
| /* |
| * Alpha/OSF is different: it doesn't pass in two pointers, |
| * but rather passes in the new bitmask as an argument and |
| * then returns the old bitmask. This "works" because we |
| * only have 64 signals to worry about. If you want more, |
| * use of the rt_sigprocmask syscall is required. |
| * Alpha: |
| * old = osf_sigprocmask(how, new); |
| * Everyone else: |
| * ret = sigprocmask(how, &new, &old, ...); |
| */ |
| printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???"); |
| tprintsigmask_val(", ", tcp->u_arg[1]); |
| } |
| else if (!syserror(tcp)) { |
| tcp->auxstr = sprintsigmask_val("old mask ", tcp->u_rval); |
| return RVAL_HEX | RVAL_STR; |
| } |
| # else /* !ALPHA */ |
| if (entering(tcp)) { |
| printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???"); |
| tprints(", "); |
| print_sigset_addr_len(tcp, tcp->u_arg[1], current_wordsize); |
| tprints(", "); |
| } |
| else { |
| if (syserror(tcp)) |
| tprintf("%#lx", tcp->u_arg[2]); |
| else |
| print_sigset_addr_len(tcp, tcp->u_arg[2], current_wordsize); |
| } |
| # endif /* !ALPHA */ |
| return 0; |
| } |
| |
| #endif /* HAVE_SIGACTION */ |
| |
| int |
| sys_kill(struct tcb *tcp) |
| { |
| if (entering(tcp)) { |
| tprintf("%ld, %s", |
| widen_to_long(tcp->u_arg[0]), |
| signame(tcp->u_arg[1]) |
| ); |
| } |
| return 0; |
| } |
| |
| int |
| sys_tgkill(struct tcb *tcp) |
| { |
| if (entering(tcp)) { |
| tprintf("%ld, %ld, %s", |
| 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) |
| { |
| if (exiting(tcp)) { |
| if (syserror(tcp)) |
| tprintf("%#lx", tcp->u_arg[0]); |
| else |
| print_sigset_addr_len(tcp, tcp->u_arg[0], current_wordsize); |
| } |
| return 0; |
| } |
| |
| int |
| sys_rt_sigprocmask(struct tcb *tcp) |
| { |
| /* Note: arg[3] is the length of the sigset. Kernel requires NSIG / 8 */ |
| if (entering(tcp)) { |
| printxval(sigprocmaskcmds, tcp->u_arg[0], "SIG_???"); |
| tprints(", "); |
| print_sigset_addr_len(tcp, tcp->u_arg[1], tcp->u_arg[3]); |
| tprints(", "); |
| } |
| else { |
| if (syserror(tcp)) |
| tprintf("%#lx", tcp->u_arg[2]); |
| else |
| 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 |
| { |
| /* 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); |
| #endif /* !MIPS */ |
| /* Kernel treats sa_mask as an array of longs. */ |
| unsigned long sa_mask[NSIG / sizeof(long) ? NSIG / sizeof(long) : 1]; |
| }; |
| /* Same for i386-on-x86_64 and similar cases */ |
| struct new_sigaction32 |
| { |
| uint32_t __sa_handler; |
| uint32_t sa_flags; |
| uint32_t sa_restorer; |
| uint32_t sa_mask[2 * (NSIG / sizeof(long) ? NSIG / sizeof(long) : 1)]; |
| }; |
| |
| static void |
| decode_new_sigaction(struct tcb *tcp, long addr) |
| { |
| struct new_sigaction sa; |
| int r; |
| |
| if (!addr) { |
| tprints("NULL"); |
| return; |
| } |
| if (!verbose(tcp) || (exiting(tcp) && syserror(tcp))) { |
| tprintf("%#lx", addr); |
| return; |
| } |
| #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); |
| if (r >= 0) { |
| memset(&sa, 0, sizeof(sa)); |
| sa.__sa_handler = (void*)(unsigned long)sa32.__sa_handler; |
| sa.sa_flags = sa32.sa_flags; |
| sa.sa_restorer = (void*)(unsigned long)sa32.sa_restorer; |
| /* Kernel treats sa_mask as an array of longs. |
| * For 32-bit process, "long" is uint32_t, thus, for example, |
| * 32th bit in sa_mask will end up as bit 0 in sa_mask[1]. |
| * But for (64-bit) kernel, 32th bit in sa_mask is |
| * 32th bit in 0th (64-bit) long! |
| * For little-endian, it's the same. |
| * For big-endian, we swap 32-bit words. |
| */ |
| sa.sa_mask[0] = sa32.sa_mask[0] + ((long)(sa32.sa_mask[1]) << 32); |
| } |
| } else |
| #endif |
| { |
| r = umove(tcp, addr, &sa); |
| } |
| if (r < 0) { |
| tprints("{...}"); |
| 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); |
| /* |
| * 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("}"); |
| } |
| |
| int |
| sys_rt_sigaction(struct tcb *tcp) |
| { |
| if (entering(tcp)) { |
| printsignal(tcp->u_arg[0]); |
| tprints(", "); |
| 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) |
| { |
| 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 |
| print_sigset_addr_len(tcp, tcp->u_arg[0], tcp->u_arg[1]); |
| tprintf(", %lu", tcp->u_arg[1]); |
| } |
| return 0; |
| } |
| |
| int |
| sys_rt_sigsuspend(struct tcb *tcp) |
| { |
| if (entering(tcp)) { |
| /* 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) |
| { |
| printsignal(sig); |
| tprints(", "); |
| printsiginfo_at(tcp, uinfo); |
| } |
| |
| int |
| sys_rt_sigqueueinfo(struct tcb *tcp) |
| { |
| if (entering(tcp)) { |
| tprintf("%lu, ", tcp->u_arg[0]); |
| print_sigqueueinfo(tcp, tcp->u_arg[1], tcp->u_arg[2]); |
| } |
| return 0; |
| } |
| |
| int |
| sys_rt_tgsigqueueinfo(struct tcb *tcp) |
| { |
| if (entering(tcp)) { |
| tprintf("%lu, %lu, ", tcp->u_arg[0], tcp->u_arg[1]); |
| print_sigqueueinfo(tcp, tcp->u_arg[2], tcp->u_arg[3]); |
| } |
| return 0; |
| } |
| |
| int sys_rt_sigtimedwait(struct tcb *tcp) |
| { |
| /* NB: kernel requires arg[3] == NSIG / 8 */ |
| if (entering(tcp)) { |
| 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) |
| return 0; |
| /* ... if it's NULL, can decode all on entry */ |
| tprints("NULL, "); |
| } |
| else if (tcp->u_arg[1] != 0) { |
| /* syscall exit, and u_arg[1] wasn't NULL */ |
| 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(", %lu", tcp->u_arg[3]); |
| return 0; |
| }; |
| |
| int |
| sys_restart_syscall(struct tcb *tcp) |
| { |
| if (entering(tcp)) |
| tprints("<... resuming interrupted call ...>"); |
| 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_addr_len(tcp, tcp->u_arg[1], tcp->u_arg[2]); |
| tprintf(", %lu", tcp->u_arg[2]); |
| if (flags_arg >= 0) { |
| tprints(", "); |
| printflags(open_mode_flags, tcp->u_arg[flags_arg], "O_???"); |
| } |
| } |
| return 0; |
| } |
| |
| int |
| sys_signalfd(struct tcb *tcp) |
| { |
| return do_signalfd(tcp, -1); |
| } |
| |
| int |
| sys_signalfd4(struct tcb *tcp) |
| { |
| return do_signalfd(tcp, 3); |
| } |