| yuezonghe | 824eb0c | 2024-06-27 02:32:26 -0700 | [diff] [blame] | 1 | /* vi: set sw=4 ts=4: */ |
| 2 | /* |
| 3 | * sigprocmask() for uClibc |
| 4 | * |
| 5 | * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org> |
| 6 | * |
| 7 | * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. |
| 8 | */ |
| 9 | |
| 10 | #include <sys/syscall.h> |
| 11 | |
| 12 | #if defined __USE_POSIX |
| 13 | #include <signal.h> |
| 14 | #ifdef __UCLIBC_HAS_THREADS_NATIVE__ |
| 15 | # include <pthreadP.h> /* SIGCANCEL */ |
| 16 | #endif |
| 17 | |
| 18 | #undef sigprocmask |
| 19 | |
| 20 | libc_hidden_proto(sigprocmask) |
| 21 | |
| 22 | #ifdef __NR_rt_sigprocmask |
| 23 | |
| 24 | # define __NR___rt_sigprocmask __NR_rt_sigprocmask |
| 25 | static __always_inline |
| 26 | _syscall4(int, __rt_sigprocmask, int, how, const sigset_t *, set, |
| 27 | sigset_t *, oldset, size_t, size) |
| 28 | |
| 29 | int sigprocmask(int how, const sigset_t * set, sigset_t * oldset) |
| 30 | { |
| 31 | #ifdef SIGCANCEL |
| 32 | sigset_t local_newmask; |
| 33 | |
| 34 | /* |
| 35 | * The only thing we have to make sure here is that SIGCANCEL and |
| 36 | * SIGSETXID are not blocked. |
| 37 | */ |
| 38 | if (set != NULL && (__builtin_expect (__sigismember (set, SIGCANCEL), 0) |
| 39 | # ifdef SIGSETXID |
| 40 | || __builtin_expect (__sigismember (set, SIGSETXID), 0) |
| 41 | # endif |
| 42 | )) |
| 43 | { |
| 44 | local_newmask = *set; |
| 45 | __sigdelset (&local_newmask, SIGCANCEL); |
| 46 | # ifdef SIGSETXID |
| 47 | __sigdelset (&local_newmask, SIGSETXID); |
| 48 | # endif |
| 49 | set = &local_newmask; |
| 50 | } |
| 51 | #endif |
| 52 | |
| 53 | return __rt_sigprocmask(how, set, oldset, _NSIG / 8); |
| 54 | } |
| 55 | |
| 56 | |
| 57 | #else |
| 58 | |
| 59 | # define __NR___syscall_sigprocmask __NR_sigprocmask |
| 60 | static __always_inline |
| 61 | _syscall3(int, __syscall_sigprocmask, int, how, const sigset_t *, set, |
| 62 | sigset_t *, oldset) |
| 63 | |
| 64 | int sigprocmask(int how, const sigset_t * set, sigset_t * oldset) |
| 65 | { |
| 66 | #ifdef SIGCANCEL |
| 67 | sigset_t local_newmask; |
| 68 | |
| 69 | /* |
| 70 | * The only thing we have to make sure here is that SIGCANCEL and |
| 71 | * SIGSETXID are not blocked. |
| 72 | */ |
| 73 | if (set != NULL && (__builtin_expect (__sigismember (set, SIGCANCEL), 0) |
| 74 | # ifdef SIGSETXID |
| 75 | || __builtin_expect (__sigismember (set, SIGSETXID), 0) |
| 76 | # endif |
| 77 | )) |
| 78 | { |
| 79 | local_newmask = *set; |
| 80 | __sigdelset (&local_newmask, SIGCANCEL); |
| 81 | # ifdef SIGSETXID |
| 82 | __sigdelset (&local_newmask, SIGSETXID); |
| 83 | # endif |
| 84 | set = &local_newmask; |
| 85 | } |
| 86 | #endif |
| 87 | |
| 88 | return (__syscall_sigprocmask(how, set, oldset)); |
| 89 | } |
| 90 | #endif |
| 91 | libc_hidden_def(sigprocmask) |
| 92 | #endif |