| /* longjmp for i386. |
| Copyright (C) 1995-2014 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 <jmpbuf-offsets.h> |
| #include <asm-syntax.h> |
| #include <stap-probe.h> |
| |
| .text |
| ENTRY (__longjmp) |
| #ifdef PTR_DEMANGLE |
| movl 4(%esp), %eax /* User's jmp_buf in %eax. */ |
| |
| /* Save the return address now. */ |
| movl (JB_PC*4)(%eax), %edx |
| /* Get the stack pointer. */ |
| movl (JB_SP*4)(%eax), %ecx |
| PTR_DEMANGLE (%edx) |
| PTR_DEMANGLE (%ecx) |
| LIBC_PROBE (longjmp, 3, 4@%eax, -4@8(%esp), 4@%edx) |
| cfi_def_cfa(%eax, 0) |
| cfi_register(%eip, %edx) |
| cfi_register(%esp, %ecx) |
| cfi_offset(%ebx, JB_BX*4) |
| cfi_offset(%esi, JB_SI*4) |
| cfi_offset(%edi, JB_DI*4) |
| cfi_offset(%ebp, JB_BP*4) |
| /* Restore registers. */ |
| movl (JB_BX*4)(%eax), %ebx |
| movl (JB_SI*4)(%eax), %esi |
| movl (JB_DI*4)(%eax), %edi |
| movl (JB_BP*4)(%eax), %ebp |
| cfi_restore(%ebx) |
| cfi_restore(%esi) |
| cfi_restore(%edi) |
| cfi_restore(%ebp) |
| |
| LIBC_PROBE (longjmp_target, 3, 4@%eax, -4@8(%esp), 4@%edx) |
| movl 8(%esp), %eax /* Second argument is return value. */ |
| movl %ecx, %esp |
| #else |
| movl 4(%esp), %ecx /* User's jmp_buf in %ecx. */ |
| movl 8(%esp), %eax /* Second argument is return value. */ |
| /* Save the return address now. */ |
| movl (JB_PC*4)(%ecx), %edx |
| LIBC_PROBE (longjmp, 3, 4@%ecx, -4@%eax, 4@%edx) |
| /* Restore registers. */ |
| movl (JB_BX*4)(%ecx), %ebx |
| movl (JB_SI*4)(%ecx), %esi |
| movl (JB_DI*4)(%ecx), %edi |
| movl (JB_BP*4)(%ecx), %ebp |
| movl (JB_SP*4)(%ecx), %esp |
| LIBC_PROBE (longjmp_target, 3, 4@%ecx, -4@%ecx, 4@%edx) |
| #endif |
| /* Jump to saved PC. */ |
| jmp *%edx |
| END (__longjmp) |
