2 Copyright (C) 1995-1998,2000,2002,2005,2006,2009
3 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, write to the Free
18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
22 #include <jmpbuf-offsets.h>
23 #include <asm-syntax.h>
27 #define PARMS LINKAGE /* no space for saved regs */
29 #define VAL JBUF+PTR_SIZE
31 ENTRY (BP_SYM (__longjmp))
35 movl JBUF(%esp), %eax /* User's jmp_buf in %eax. */
36 CHECK_BOUNDS_BOTH_WIDE (%eax, JBUF(%esp), $JB_SIZE)
38 /* Save the return address now. */
39 movl (JB_PC*4)(%eax), %edx
40 /* Get the stack pointer. */
41 movl (JB_SP*4)(%eax), %ecx
48 cfi_register(%eip, %edx)
49 cfi_register(%esp, %ecx)
50 cfi_offset(%ebx, JB_BX*4)
51 cfi_offset(%esi, JB_SI*4)
52 cfi_offset(%edi, JB_DI*4)
53 cfi_offset(%ebp, JB_BP*4)
54 /* Restore registers. */
55 movl (JB_BX*4)(%eax), %ebx
56 movl (JB_SI*4)(%eax), %esi
57 movl (JB_DI*4)(%eax), %edi
58 movl (JB_BP*4)(%eax), %ebp
64 movl VAL(%esp), %eax /* Second argument is return value. */
67 movl JBUF(%esp), %ecx /* User's jmp_buf in %ecx. */
68 CHECK_BOUNDS_BOTH_WIDE (%ecx, JBUF(%esp), $JB_SIZE)
71 movl (JB_SP*4)(%ecx), %eax
75 movl VAL(%esp), %eax /* Second argument is return value. */
76 /* Save the return address now. */
77 movl (JB_PC*4)(%ecx), %edx
78 /* Restore registers. */
79 movl (JB_BX*4)(%ecx), %ebx
80 movl (JB_SI*4)(%ecx), %esi
81 movl (JB_DI*4)(%ecx), %edi
82 movl (JB_BP*4)(%ecx), %ebp
83 movl (JB_SP*4)(%ecx), %esp
85 /* Jump to saved PC. */
87 END (BP_SYM (__longjmp))