diff options
Diffstat (limited to 'REORG.TODO/sysdeps/i386/bsd-_setjmp.S')
| -rw-r--r-- | REORG.TODO/sysdeps/i386/bsd-_setjmp.S | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/i386/bsd-_setjmp.S b/REORG.TODO/sysdeps/i386/bsd-_setjmp.S new file mode 100644 index 0000000000..6496304946 --- /dev/null +++ b/REORG.TODO/sysdeps/i386/bsd-_setjmp.S @@ -0,0 +1,56 @@ +/* BSD `_setjmp' entry point to `sigsetjmp (..., 0)'. i386 version. + Copyright (C) 1994-2017 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/>. */ + +/* 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 + in setjmp doesn't clobber the state restored by longjmp. */ + +#include <sysdep.h> +#include <jmpbuf-offsets.h> +#include <stap-probe.h> + +#define PARMS 4 /* no space for saved regs */ +#define JMPBUF PARMS +#define SIGMSK JMPBUF+4 + +ENTRY (_setjmp) + + xorl %eax, %eax + movl JMPBUF(%esp), %edx + + /* Save registers. */ + movl %ebx, (JB_BX*4)(%edx) + movl %esi, (JB_SI*4)(%edx) + movl %edi, (JB_DI*4)(%edx) + leal JMPBUF(%esp), %ecx /* Save SP as it will be after we return. */ +#ifdef PTR_MANGLE + PTR_MANGLE (%ecx) +#endif + movl %ecx, (JB_SP*4)(%edx) + movl 0(%esp), %ecx /* Save PC we are returning to now. */ + LIBC_PROBE (setjmp, 3, 4@%edx, -4@$0, 4@%ecx) +#ifdef PTR_MANGLE + PTR_MANGLE (%ecx) +#endif + movl %ecx, (JB_PC*4)(%edx) + movl %ebp, (JB_BP*4)(%edx) /* Save caller's frame pointer. */ + + movl %eax, JB_SIZE(%edx) /* No signal mask set. */ + ret +END (_setjmp) +libc_hidden_def (_setjmp) |