1 fe8c925e 2005-07-21 devnull #include "FreeBSD-386-asm.s"
  2 bea4b9f7 2005-07-19 devnull 
  3 fe8c925e 2005-07-21 devnull /*
  4 fe8c925e 2005-07-21 devnull  * Copyright (c) 2000 Peter Wemm <peter@FreeBSD.org>
  5 fe8c925e 2005-07-21 devnull  * All rights reserved.
  6 fe8c925e 2005-07-21 devnull  *
  7 fe8c925e 2005-07-21 devnull  * Redistribution and use in source and binary forms, with or without
  8 fe8c925e 2005-07-21 devnull  * modification, are permitted provided that the following conditions
  9 fe8c925e 2005-07-21 devnull  * are met:
 10 fe8c925e 2005-07-21 devnull  * 1. Redistributions of source code must retain the above copyright
 11 fe8c925e 2005-07-21 devnull  *    notice, this list of conditions and the following disclaimer.
 12 fe8c925e 2005-07-21 devnull  * 2. Redistributions in binary form must reproduce the above copyright
 13 fe8c925e 2005-07-21 devnull  *    notice, this list of conditions and the following disclaimer in the
 14 fe8c925e 2005-07-21 devnull  *    documentation and/or other materials provided with the distribution.
 15 fe8c925e 2005-07-21 devnull  *
 16 fe8c925e 2005-07-21 devnull  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 17 fe8c925e 2005-07-21 devnull  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 18 fe8c925e 2005-07-21 devnull  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 19 fe8c925e 2005-07-21 devnull  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 20 fe8c925e 2005-07-21 devnull  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 21 fe8c925e 2005-07-21 devnull  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 22 fe8c925e 2005-07-21 devnull  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 23 fe8c925e 2005-07-21 devnull  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 24 fe8c925e 2005-07-21 devnull  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 25 fe8c925e 2005-07-21 devnull  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 26 fe8c925e 2005-07-21 devnull  * SUCH DAMAGE.
 27 fe8c925e 2005-07-21 devnull  */
 28 bea4b9f7 2005-07-19 devnull 
 29 fe8c925e 2005-07-21 devnull #include <sys/syscall.h>
 30 fe8c925e 2005-07-21 devnull #include <machine/asm.h>
 31 fe8c925e 2005-07-21 devnull 
 32 fe8c925e 2005-07-21 devnull ENTRY(rfork_thread)
 33 fe8c925e 2005-07-21 devnull 	pushl   %ebp
 34 fe8c925e 2005-07-21 devnull 	movl    %esp, %ebp
 35 fe8c925e 2005-07-21 devnull 	pushl   %esi
 36 fe8c925e 2005-07-21 devnull 
 37 fe8c925e 2005-07-21 devnull 	/*
 38 fe8c925e 2005-07-21 devnull 	* Push thread info onto the new thread's stack
 39 fe8c925e 2005-07-21 devnull 	*/
 40 fe8c925e 2005-07-21 devnull 	movl    12(%ebp), %esi  # get stack addr
 41 fe8c925e 2005-07-21 devnull 
 42 fe8c925e 2005-07-21 devnull 	subl    $4, %esi
 43 fe8c925e 2005-07-21 devnull 	movl    20(%ebp), %eax  # get start argument
 44 fe8c925e 2005-07-21 devnull 	movl    %eax, (%esi)
 45 fe8c925e 2005-07-21 devnull 
 46 fe8c925e 2005-07-21 devnull 	subl    $4, %esi
 47 fe8c925e 2005-07-21 devnull 	movl    16(%ebp), %eax  # get start thread address
 48 fe8c925e 2005-07-21 devnull 	movl    %eax, (%esi)
 49 fe8c925e 2005-07-21 devnull 
 50 fe8c925e 2005-07-21 devnull 	/*
 51 fe8c925e 2005-07-21 devnull 	* Prepare and execute the thread creation syscall
 52 fe8c925e 2005-07-21 devnull 	*/
 53 fe8c925e 2005-07-21 devnull 	pushl   8(%ebp)
 54 fe8c925e 2005-07-21 devnull 	pushl   $0
 55 fe8c925e 2005-07-21 devnull 	movl    $SYS_rfork, %eax
 56 fe8c925e 2005-07-21 devnull 	int     $0x80
 57 fe8c925e 2005-07-21 devnull 	jb      2f
 58 fe8c925e 2005-07-21 devnull 
 59 fe8c925e 2005-07-21 devnull 	/*
 60 fe8c925e 2005-07-21 devnull 	* Check to see if we are in the parent or child
 61 fe8c925e 2005-07-21 devnull 	*/
 62 fe8c925e 2005-07-21 devnull 	cmpl    $0, %edx
 63 fe8c925e 2005-07-21 devnull 	jnz     1f
 64 fe8c925e 2005-07-21 devnull 	addl    $8, %esp
 65 fe8c925e 2005-07-21 devnull 	popl    %esi
 66 fe8c925e 2005-07-21 devnull 	movl    %ebp, %esp
 67 fe8c925e 2005-07-21 devnull 	popl    %ebp
 68 bea4b9f7 2005-07-19 devnull 	ret
 69 fe8c925e 2005-07-21 devnull 	.p2align 2
 70 bea4b9f7 2005-07-19 devnull 
 71 fe8c925e 2005-07-21 devnull 	/*
 72 fe8c925e 2005-07-21 devnull 	* If we are in the child (new thread), then
 73 fe8c925e 2005-07-21 devnull 	* set-up the call to the internal subroutine.  If it
 74 fe8c925e 2005-07-21 devnull 	* returns, then call __exit.
 75 fe8c925e 2005-07-21 devnull 	*/
 76 fe8c925e 2005-07-21 devnull 1:
 77 fe8c925e 2005-07-21 devnull 	movl    %esi,%esp
 78 fe8c925e 2005-07-21 devnull 	popl    %eax
 79 fe8c925e 2005-07-21 devnull 	call    *%eax
 80 fe8c925e 2005-07-21 devnull 	addl    $4, %esp
 81 fe8c925e 2005-07-21 devnull 
 82 fe8c925e 2005-07-21 devnull 	/*
 83 fe8c925e 2005-07-21 devnull 	* Exit system call
 84 fe8c925e 2005-07-21 devnull 	*/
 85 fe8c925e 2005-07-21 devnull 	pushl   %eax
 86 fe8c925e 2005-07-21 devnull 	pushl   $0
 87 fe8c925e 2005-07-21 devnull 	movl    $SYS_exit, %eax
 88 fe8c925e 2005-07-21 devnull 	int     $0x80
 89 fe8c925e 2005-07-21 devnull 
 90 fe8c925e 2005-07-21 devnull 	/*
 91 fe8c925e 2005-07-21 devnull 	* Branch here if the thread creation fails:
 92 fe8c925e 2005-07-21 devnull 	*/
 93 fe8c925e 2005-07-21 devnull 2:
 94 fe8c925e 2005-07-21 devnull 	addl    $8, %esp
 95 fe8c925e 2005-07-21 devnull 	popl    %esi
 96 fe8c925e 2005-07-21 devnull 	movl    %ebp, %esp
 97 fe8c925e 2005-07-21 devnull 	popl    %ebp
 98 fe8c925e 2005-07-21 devnull 	PIC_PROLOGUE
 99 c54b8b69 2006-01-27 devnull 	jmp     PIC_PLT(_C_LABEL(__cerror))
100 c54b8b69 2006-01-27 devnull