diff options
Diffstat (limited to 'module/lua/setjmp/setjmp_i386.S')
-rw-r--r-- | module/lua/setjmp/setjmp_i386.S | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/module/lua/setjmp/setjmp_i386.S b/module/lua/setjmp/setjmp_i386.S new file mode 100644 index 000000000..6d6a5f332 --- /dev/null +++ b/module/lua/setjmp/setjmp_i386.S @@ -0,0 +1,69 @@ +/* + * CDDL HEADER START + * + * The contents of this file are subject to the terms of the + * Common Development and Distribution License (the "License"). + * You may not use this file except in compliance with the License. + * + * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE + * or http://www.opensolaris.org/os/licensing. + * See the License for the specific language governing permissions + * and limitations under the License. + * + * When distributing Covered Code, include this CDDL HEADER in each + * file and include the License file at usr/src/OPENSOLARIS.LICENSE. + * If applicable, add the following below this CDDL HEADER, with the + * fields enclosed by brackets "[]" replaced with your own identifying + * information: Portions Copyright [yyyy] [name of copyright owner] + * + * CDDL HEADER END + */ + +/* + * Copyright (c) 1992, 2010, Oracle and/or its affiliates. All rights reserved. + */ + +#define ENTRY(x) \ + .text; \ + .align 8; \ + .globl x; \ + .type x, @function; \ +x: + +#define SET_SIZE(x) \ + .size x, [.-x] + +/* + * Setjmp and longjmp implement non-local gotos using state vectors + * type label_t. + */ +#ifdef __i386__ + + ENTRY(setjmp) /* save area is passed in eax */ + movl %ebp, 0(%eax) /* save ebp */ + movl %ebx, 4(%eax) /* save ebx */ + movl %esi, 8(%eax) /* save esi */ + movl %edi, 12(%eax) /* save edi */ + movl %esp, 16(%eax) /* save esp */ + movl (%esp), %ecx /* %eip (return address) */ + movl %ecx, 20(%eax) /* save eip */ + subl %eax, %eax /* return 0 */ + ret + SET_SIZE(setjmp) + + ENTRY(longjmp) /* save area is passed in eax */ + movl 0(%eax), %ebp /* restore ebp */ + movl 4(%eax), %ebx /* restore ebx */ + movl 8(%eax), %esi /* restore esi */ + movl 12(%eax), %edi /* restore edi */ + movl 16(%eax), %esp /* restore esp */ + movl 20(%eax), %ecx /* %eip (return address) */ + addl $4, %esp /* pop ret adr */ + jmp *%ecx /* indirect jump */ + SET_SIZE(longjmp) + +#ifdef __ELF__ +.section .note.GNU-stack,"",%progbits +#endif + +#endif /* __i386__ */ |