summaryrefslogtreecommitdiffstats
path: root/module/lua/setjmp/setjmp_i386.S
diff options
context:
space:
mode:
Diffstat (limited to 'module/lua/setjmp/setjmp_i386.S')
-rw-r--r--module/lua/setjmp/setjmp_i386.S69
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__ */