diff options
Diffstat (limited to 'sysdeps/i386/bsd-_setjmp.S')
| -rw-r--r-- | sysdeps/i386/bsd-_setjmp.S | 42 |
1 files changed, 27 insertions, 15 deletions
diff --git a/sysdeps/i386/bsd-_setjmp.S b/sysdeps/i386/bsd-_setjmp.S index a7ee5dbc1e..47972b28d1 100644 --- a/sysdeps/i386/bsd-_setjmp.S +++ b/sysdeps/i386/bsd-_setjmp.S @@ -1,21 +1,21 @@ /* BSD `_setjmp' entry point to `sigsetjmp (..., 0)'. i386 version. -Copyright (C) 1994, 1995, 1996 Free Software Foundation, Inc. -This file is part of the GNU C Library. + Copyright (C) 1994, 1995, 1996, 1997 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 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. + 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. */ + 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., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ /* This just does a tail-call to `__sigsetjmp (ARG, 0)'. We cannot do it in C because it must be a tail-call, so frame-unwinding @@ -29,5 +29,17 @@ ENTRY (_setjmp) pushl $0 /* Push second argument of zero. */ pushl %ecx /* Push back first argument. */ pushl %eax /* Push back return PC. */ - jmp JUMPTARGET (C_SYMBOL_NAME (__sigsetjmp)) +#ifdef PIC + /* We cannot use the PLT, because it requires that %ebx be set, but + we can't save and restore our caller's value. Instead, we do an + indirect jump through the GOT, using for the temporary register + %ecx, which is call-clobbered. */ + call here +here: popl %ecx + addl $_GLOBAL_OFFSET_TABLE_+[.-here], %ecx + movl C_SYMBOL_NAME(__sigsetjmp@GOT)(%ecx), %ecx + jmp *%ecx +#else + jmp __sigsetjmp +#endif END (_setjmp) |