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Diffstat (limited to 'lib/libc/amd64/sys/vfork.S')
-rw-r--r-- | lib/libc/amd64/sys/vfork.S | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/lib/libc/amd64/sys/vfork.S b/lib/libc/amd64/sys/vfork.S new file mode 100644 index 0000000..555c3ca --- /dev/null +++ b/lib/libc/amd64/sys/vfork.S @@ -0,0 +1,61 @@ +/*- + * Copyright (c) 1990 The Regents of the University of California. + * All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * William Jolitz. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * 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 + * SUCH DAMAGE. + */ + +#if defined(SYSLIBC_SCCS) && !defined(lint) + .asciz "@(#)Ovfork.s 5.1 (Berkeley) 4/23/90" +#endif /* SYSLIBC_SCCS and not lint */ +#include <machine/asm.h> +__FBSDID("$FreeBSD$"); + +#include "SYS.h" + + .weak _vfork + .set _vfork,__sys_vfork + .weak vfork + .set vfork,__sys_vfork +ENTRY(__sys_vfork) + popq %rsi /* fetch return address (%rsi preserved) */ + mov $SYS_vfork,%rax + KERNCALL + jb 1f + jmp *%rsi +1: + pushq %rsi +#ifdef PIC + movq PIC_GOT(HIDENAME(cerror)),%rdx + jmp *%rdx +#else + jmp HIDENAME(cerror) +#endif +END(__sys_vfork) + + .section .note.GNU-stack,"",%progbits |