mirror_zfs/module/lua/setjmp/setjmp_i386.S
Chris Williamson d99a015343 OpenZFS 7431 - ZFS Channel Programs
Authored by: Chris Williamson <chris.williamson@delphix.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: John Kennedy <john.kennedy@delphix.com>
Reviewed by: Dan Kimmel <dan.kimmel@delphix.com>
Approved by: Garrett D'Amore <garrett@damore.org>
Ported-by: Don Brady <don.brady@delphix.com>
Ported-by: John Kennedy <john.kennedy@delphix.com>

OpenZFS-issue: https://www.illumos.org/issues/7431
OpenZFS-commit: https://github.com/openzfs/openzfs/commit/dfc11533

Porting Notes:
* The CLI long option arguments for '-t' and '-m' don't parse on linux
* Switched from kmem_alloc to vmem_alloc in zcp_lua_alloc
* Lua implementation is built as its own module (zlua.ko)
* Lua headers consumed directly by zfs code moved to 'include/sys/lua/'
* There is no native setjmp/longjump available in stock Linux kernel.
  Brought over implementations from illumos and FreeBSD
* The get_temporary_prop() was adapted due to VFS platform differences
* Use of inline functions in lua parser to reduce stack usage per C call
* Skip some ZFS Test Suite ZCP tests on sparc64 to avoid stack overflow
2018-02-08 15:28:18 -08:00

70 lines
1.9 KiB
ArmAsm

/*
* 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__ */