diff options
Diffstat (limited to 'sysdeps/unix/bsd/sequent/i386/sigvec.S')
| -rw-r--r-- | sysdeps/unix/bsd/sequent/i386/sigvec.S | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/sysdeps/unix/bsd/sequent/i386/sigvec.S b/sysdeps/unix/bsd/sequent/i386/sigvec.S new file mode 100644 index 0000000000..1bb57c2074 --- /dev/null +++ b/sysdeps/unix/bsd/sequent/i386/sigvec.S @@ -0,0 +1,45 @@ +/* Copyright (C) 1993, 1995 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 Library General Public License as +published by the Free Software Foundation; either version 2 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 +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#include <sysdep.h> + +/* The Dynix `sigvec' system call takes an extra argument, + which is the address of the trampoline function. */ + +.text +.align 4 +trampoline: + cld /* Clear direction flag. */ + call %eax /* Call the handler, address in %eax. */ + addl $8, %esp /* Pop signum & code off the stack. */ + /* __sigreturn will restore the context, and never return here. */ + call C_SYMBOL_NAME (__sigreturn) + +.globl syscall_error +ENTRY (__sigvec) + pushl $trampoline /* Push fourth arg: trampoline address. */ + pushl 16(%esp) /* Push third arg: our third arg. */ + pushl 16(%esp) /* Push second arg: our second arg. */ + pushl 16(%esp) /* Push first arg: our first arg. */ + mov %esp, %ecx /* Point the syscall at the arguments. */ + addl $16, %esp /* Pop those four args. */ + DO_CALL (sigvec, 4) /* Do the system call. */ + jb syscall_error /* Check for error. */ + ret + +weak_alias (__sigvec, sigvec) |