diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/i386/sigaction.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/i386/sigaction.c | 129 |
1 files changed, 0 insertions, 129 deletions
diff --git a/sysdeps/unix/sysv/linux/i386/sigaction.c b/sysdeps/unix/sysv/linux/i386/sigaction.c deleted file mode 100644 index 0cc9d67ad9..0000000000 --- a/sysdeps/unix/sysv/linux/i386/sigaction.c +++ /dev/null @@ -1,129 +0,0 @@ -/* POSIX.1 `sigaction' call for Linux/i386. - Copyright (C) 1991-2017 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - <http://www.gnu.org/licenses/>. */ - -#include <sysdep.h> -#include <errno.h> -#include <stddef.h> -#include <signal.h> -#include <string.h> - -#include <sysdep.h> -#include <sys/syscall.h> -#include <ldsodefs.h> - -/* The difference here is that the sigaction structure used in the - kernel is not the same as we use in the libc. Therefore we must - translate it here. */ -#include <kernel_sigaction.h> - -/* We do not globally define the SA_RESTORER flag so do it here. */ -#define SA_RESTORER 0x04000000 - - -/* Using the hidden attribute here does not change the code but it - helps to avoid warnings. */ -#ifdef __NR_rt_sigaction -extern void restore_rt (void) asm ("__restore_rt") attribute_hidden; -#endif -extern void restore (void) asm ("__restore") attribute_hidden; - - -/* If ACT is not NULL, change the action for SIG to *ACT. - If OACT is not NULL, put the old action for SIG in *OACT. */ -int -__libc_sigaction (int sig, const struct sigaction *act, struct sigaction *oact) -{ - int result; - - struct kernel_sigaction kact, koact; - - if (act) - { - kact.k_sa_handler = act->sa_handler; - kact.sa_flags = act->sa_flags; - memcpy (&kact.sa_mask, &act->sa_mask, sizeof (sigset_t)); - - if (GLRO(dl_sysinfo_dso) == NULL) - { - kact.sa_flags |= SA_RESTORER; - - kact.sa_restorer = ((act->sa_flags & SA_SIGINFO) - ? &restore_rt : &restore); - } - } - - /* XXX The size argument hopefully will have to be changed to the - real size of the user-level sigset_t. */ - INTERNAL_SYSCALL_DECL (err); - result = INTERNAL_SYSCALL (rt_sigaction, err, 4, - sig, act ? &kact : NULL, - oact ? &koact : NULL, _NSIG / 8); - if (__glibc_unlikely (INTERNAL_SYSCALL_ERROR_P (result, err))) - return INLINE_SYSCALL_ERROR_RETURN_VALUE (INTERNAL_SYSCALL_ERRNO (result, - err)); - else if (oact && result >= 0) - { - oact->sa_handler = koact.k_sa_handler; - memcpy (&oact->sa_mask, &koact.sa_mask, sizeof (sigset_t)); - oact->sa_flags = koact.sa_flags; - oact->sa_restorer = koact.sa_restorer; - } - return result; -} -libc_hidden_def (__libc_sigaction) - -#include <nptl/sigaction.c> - -/* NOTE: Please think twice before making any changes to the bits of - code below. GDB needs some intimate knowledge about it to - recognize them as signal trampolines, and make backtraces through - signal handlers work right. Important are both the names - (__restore and __restore_rt) and the exact instruction sequence. - If you ever feel the need to make any changes, please notify the - appropriate GDB maintainer. */ - -#define RESTORE(name, syscall) RESTORE2 (name, syscall) -#define RESTORE2(name, syscall) \ -asm \ - ( \ - ".text\n" \ - " .align 16\n" \ - "__" #name ":\n" \ - " movl $" #syscall ", %eax\n" \ - " int $0x80" \ - ); - -#ifdef __NR_rt_sigaction -/* The return code for realtime-signals. */ -RESTORE (restore_rt, __NR_rt_sigreturn) -#endif - -/* For the boring old signals. */ -#undef RESTORE2 -#define RESTORE2(name, syscall) \ -asm \ - ( \ - ".text\n" \ - " .align 8\n" \ - "__" #name ":\n" \ - " popl %eax\n" \ - " movl $" #syscall ", %eax\n" \ - " int $0x80" \ - ); - -RESTORE (restore, __NR_sigreturn) |