| /* BSD `setjmp' entry point to `sigsetjmp (..., 1)'. i386 version. |
| Copyright (C) 1994-2016 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, 1)'. |
| 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) |
| /* Note that we have to use a non-exported symbol in the next |
| jump since otherwise gas will emit it as a jump through the |
| PLT which is what we cannot use here. */ |
| |
| movl JMPBUF(%esp), %eax |
| |
| /* Save registers. */ |
| movl %ebx, (JB_BX*4)(%eax) |
| movl %esi, (JB_SI*4)(%eax) |
| movl %edi, (JB_DI*4)(%eax) |
| 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)(%eax) |
| movl 0(%esp), %ecx /* Save PC we are returning to now. */ |
| LIBC_PROBE (setjmp, 3, 4@%eax, -4@$1, 4@%ecx) |
| #ifdef PTR_MANGLE |
| PTR_MANGLE (%ecx) |
| #endif |
| movl %ecx, (JB_PC*4)(%eax) |
| movl %ebp, (JB_BP*4)(%eax) /* Save caller's frame pointer. */ |
| |
| /* Call __sigjmp_save. */ |
| pushl $1 |
| cfi_adjust_cfa_offset (4) |
| pushl 8(%esp) |
| cfi_adjust_cfa_offset (4) |
| call __sigjmp_save |
| popl %ecx |
| cfi_adjust_cfa_offset (-4) |
| popl %edx |
| cfi_adjust_cfa_offset (-4) |
| ret |
| END (setjmp) |