1995-09-01 01:33:01 +08:00
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/* longjmp for i386.
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2012-05-26 04:31:57 +08:00
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Copyright (C) 1995-2012 Free Software Foundation, Inc.
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1997-03-20 10:20:57 +08:00
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This file is part of the GNU C Library.
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1995-09-01 01:33:01 +08:00
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1997-03-20 10:20:57 +08:00
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The GNU C Library is free software; you can redistribute it and/or
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2001-07-06 12:58:11 +08:00
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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1995-09-01 01:33:01 +08:00
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1997-03-20 10:20:57 +08:00
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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2001-07-06 12:58:11 +08:00
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Lesser General Public License for more details.
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1995-09-01 01:33:01 +08:00
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2001-07-06 12:58:11 +08:00
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You should have received a copy of the GNU Lesser General Public
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2012-02-10 07:18:22 +08:00
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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1995-09-01 01:33:01 +08:00
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#include <sysdep.h>
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2006-01-12 17:27:47 +08:00
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#include <jmpbuf-offsets.h>
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2000-06-30 06:55:31 +08:00
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#include <asm-syntax.h>
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2012-05-26 04:31:57 +08:00
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#include <stap-probe.h>
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1995-09-01 01:33:01 +08:00
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2009-05-22 09:38:11 +08:00
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.text
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2009-07-31 12:50:14 +08:00
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ENTRY (__longjmp)
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2005-12-29 03:13:20 +08:00
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#ifdef PTR_DEMANGLE
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2009-07-31 12:50:14 +08:00
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movl 4(%esp), %eax /* User's jmp_buf in %eax. */
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2005-12-29 03:13:20 +08:00
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/* Save the return address now. */
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movl (JB_PC*4)(%eax), %edx
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/* Get the stack pointer. */
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movl (JB_SP*4)(%eax), %ecx
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PTR_DEMANGLE (%edx)
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PTR_DEMANGLE (%ecx)
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2012-05-26 04:31:57 +08:00
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LIBC_PROBE (longjmp, 3, 4@%eax, -4@8(%esp), 4@%edx)
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2005-12-29 03:13:20 +08:00
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cfi_def_cfa(%eax, 0)
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cfi_register(%eip, %edx)
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cfi_register(%esp, %ecx)
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cfi_offset(%ebx, JB_BX*4)
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cfi_offset(%esi, JB_SI*4)
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cfi_offset(%edi, JB_DI*4)
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cfi_offset(%ebp, JB_BP*4)
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/* Restore registers. */
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movl (JB_BX*4)(%eax), %ebx
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movl (JB_SI*4)(%eax), %esi
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movl (JB_DI*4)(%eax), %edi
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movl (JB_BP*4)(%eax), %ebp
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cfi_restore(%ebx)
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cfi_restore(%esi)
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cfi_restore(%edi)
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cfi_restore(%ebp)
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2012-05-26 04:31:57 +08:00
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LIBC_PROBE (longjmp_target, 3, 4@%eax, -4@8(%esp), 4@%edx)
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2009-07-31 12:50:14 +08:00
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movl 8(%esp), %eax /* Second argument is return value. */
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2005-12-29 03:13:20 +08:00
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movl %ecx, %esp
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#else
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2009-07-31 12:50:14 +08:00
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movl 4(%esp), %ecx /* User's jmp_buf in %ecx. */
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movl 8(%esp), %eax /* Second argument is return value. */
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1998-02-24 23:22:29 +08:00
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/* Save the return address now. */
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movl (JB_PC*4)(%ecx), %edx
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2012-05-26 04:31:57 +08:00
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LIBC_PROBE (longjmp, 3, 4@%ecx, -4@%eax, 4@%edx)
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1995-09-01 01:33:01 +08:00
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/* Restore registers. */
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1995-09-02 06:25:08 +08:00
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movl (JB_BX*4)(%ecx), %ebx
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movl (JB_SI*4)(%ecx), %esi
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movl (JB_DI*4)(%ecx), %edi
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movl (JB_BP*4)(%ecx), %ebp
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movl (JB_SP*4)(%ecx), %esp
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2012-05-26 04:31:57 +08:00
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LIBC_PROBE (longjmp_target, 3, 4@%ecx, -4@%ecx, 4@%edx)
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2005-12-18 14:58:22 +08:00
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#endif
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1995-09-01 01:33:01 +08:00
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/* Jump to saved PC. */
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1998-02-24 23:22:29 +08:00
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jmp *%edx
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2009-07-31 12:50:14 +08:00
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END (__longjmp)
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