diff options
Diffstat (limited to 'REORG.TODO/sysdeps/i386/__longjmp.S')
| -rw-r--r-- | REORG.TODO/sysdeps/i386/__longjmp.S | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/i386/__longjmp.S b/REORG.TODO/sysdeps/i386/__longjmp.S new file mode 100644 index 0000000000..3719763cd6 --- /dev/null +++ b/REORG.TODO/sysdeps/i386/__longjmp.S @@ -0,0 +1,72 @@ +/* longjmp for i386. + Copyright (C) 1995-2017 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/>. */ + +#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) |