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lib/libsys/powerpc64/sys/cerror.S
- This file was moved from lib/libc/amd64/sys/getcontext.S.
| /*- | /*- | ||||
| * Copyright (c) 2003 Peter Wemm <peter@FreeBSD.org> | * Copyright (c) 2002 Peter Grehan. | ||||
| * All rights reserved. | * All rights reserved. | ||||
| * | * | ||||
| * Redistribution and use in source and binary forms, with or without | * Redistribution and use in source and binary forms, with or without | ||||
| * modification, are permitted provided that the following conditions | * modification, are permitted provided that the following conditions | ||||
| * are met: | * are met: | ||||
| * 1. Redistributions of source code must retain the above copyright | * 1. Redistributions of source code must retain the above copyright | ||||
| * notice, this list of conditions and the following disclaimer. | * notice, this list of conditions and the following disclaimer. | ||||
| * 2. Redistributions in binary form must reproduce the above copyright | * 2. Redistributions in binary form must reproduce the above copyright | ||||
| * notice, this list of conditions and the following disclaimer in the | * notice, this list of conditions and the following disclaimer in the | ||||
| * documentation and/or other materials provided with the distribution. | * documentation and/or other materials provided with the distribution. | ||||
| * | * | ||||
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND | ||||
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | ||||
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | ||||
| * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | ||||
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | ||||
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | ||||
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | ||||
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | ||||
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | ||||
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | ||||
| * SUCH DAMAGE. | * SUCH DAMAGE. | ||||
| */ | */ | ||||
| /* $NetBSD: cerror.S,v 1.5 2000/01/27 14:58:48 kleink Exp $ */ | |||||
| #include <machine/asm.h> | #include <machine/asm.h> | ||||
| __FBSDID("$FreeBSD$"); | __FBSDID("$FreeBSD$"); | ||||
| #include <SYS.h> | #include "SYS.h" | ||||
| .globl HIDENAME(cerror) | |||||
| .globl CNAME(__error) | |||||
| /* | /* | ||||
| * This has to be magic to handle the multiple returns. | * The __error() function is thread aware. For non-threaded | ||||
| * Otherwise, the setcontext() syscall will return here and we'll | * programs and the initial threaded in threaded programs, | ||||
| * pop off the return address and go to the *setcontext* call. | * it returns a pointer to the global errno variable. | ||||
| */ | */ | ||||
| WEAK_REFERENCE(__sys_getcontext, _getcontext) | ENTRY_NOPROF(HIDENAME(cerror)) | ||||
| WEAK_REFERENCE(__sys_getcontext, getcontext) | mflr %r0 | ||||
| ENTRY(__sys_getcontext) | std %r0,16(%r1) /* save lr */ | ||||
| movq (%rsp),%rsi /* save getcontext return address */ | stdu %r1,-64(%r1) /* allocate new stack frame */ | ||||
| mov $SYS_getcontext,%rax | std %r31,48(%r1) | ||||
| KERNCALL | |||||
| jb HIDENAME(cerror) | mr %r31,%r3 /* stash errval in callee-saved register */ | ||||
| addq $8,%rsp /* remove stale (setcontext) return address */ | bl CNAME(__error) | ||||
| jmp *%rsi /* restore return address */ | nop | ||||
| END(__sys_getcontext) | stw %r31,0(%r3) /* store errval into &errno */ | ||||
| ld %r31,48(%r1) | |||||
| ld %r1,0(%r1) | |||||
| ld %r0,16(%r1) | |||||
| mtlr %r0 | |||||
| li %r3,-1 | |||||
| li %r4,-1 | |||||
| blr | |||||
| .section .note.GNU-stack,"",%progbits | .section .note.GNU-stack,"",%progbits | ||||