diff options
Diffstat (limited to 'gnu-efi/gnu-efi-3.0/gnuefi/setjmp_ia32.S')
-rw-r--r-- | gnu-efi/gnu-efi-3.0/gnuefi/setjmp_ia32.S | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/gnu-efi/gnu-efi-3.0/gnuefi/setjmp_ia32.S b/gnu-efi/gnu-efi-3.0/gnuefi/setjmp_ia32.S new file mode 100644 index 0000000..5f71caf --- /dev/null +++ b/gnu-efi/gnu-efi-3.0/gnuefi/setjmp_ia32.S @@ -0,0 +1,87 @@ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2000 Free Software Foundation, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <http://www.gnu.org/licenses/>. + */ + +/* This is stolen from libc/x86/setjmp.S in the OSKit */ +/* + * Mach Operating System + * Copyright (c) 1991,1990,1989 Carnegie Mellon University + * All Rights Reserved. + * + * Permission to use, copy, modify and distribute this software and its + * documentation is hereby granted, provided that both the copyright + * notice and this permission notice appear in all copies of the + * software, derivative works or modified versions, and any portions + * thereof, and that both notices appear in supporting documentation. + * + * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" + * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR + * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. + * + * Carnegie Mellon requests users of this software to return to + * + * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU + * School of Computer Science + * Carnegie Mellon University + * Pittsburgh PA 15213-3890 + * + * any improvements or extensions that they make and grant Carnegie Mellon + * the rights to redistribute these changes. + */ +/* + * C library -- _setjmp, _longjmp + * + * _longjmp(a,v) + * will generate a "return(v)" from + * the last call to + * _setjmp(a) + * by restoring registers from the stack, + * The previous signal state is NOT restored. + * + */ + +#define EXT_C(sym) sym +#define FUNCTION(x) .globl EXT_C(x) ; .type EXT_C(x), @function ; EXT_C(x): + + .file "setjmp.S" + + .text + +FUNCTION(setjmp) + movl 4(%esp), %ecx /* fetch buffer */ + movl %ebx, 0(%ecx) + movl %esi, 4(%ecx) + movl %edi, 8(%ecx) + movl %ebp, 12(%ecx) /* save frame pointer of caller */ + popl %edx + movl %esp, 16(%ecx) /* save stack pointer of caller */ + movl %edx, 20(%ecx) /* save pc of caller */ + xorl %eax, %eax + jmp *%edx + +FUNCTION(longjmp) + movl 8(%esp), %eax /* return(v) */ + movl 4(%esp), %ecx /* fetch buffer */ + movl 0(%ecx), %ebx + movl 4(%ecx), %esi + movl 8(%ecx), %edi + movl 12(%ecx), %ebp + movl 16(%ecx), %esp + orl %eax, %eax + jnz 0f + incl %eax +0: jmp *20(%ecx) /* done, return.... */ |