OpenBSD, thanks to Tim Wiess

1 files changed, 95 insertions, 50 deletions

diff --git a/src/libthread/OpenBSD-386-asm.s b/src/libthread/OpenBSD-386-asm.s
index f9a80255..7ffb413c 100644
--- a/src/libthread/OpenBSD-386-asm.s
+++ b/src/libthread/OpenBSD-386-asm.s
@@ -1,54 +1,99 @@
-.globl _tas
-_tas:
-	movl $0xCAFEBABE, %eax
-	movl 4(%esp), %ecx
-	xchgl %eax, 0(%ecx)
-	ret
+#include "FreeBSD-386-asm.s"
 
-.globl setmcontext
-setmcontext:
-	movl 4(%esp), %edx
-	movl	8(%edx), %fs
-	movl	12(%edx), %es
-	movl	16(%edx), %ds
-	movl	76(%edx), %ss
-	movl	20(%edx), %edi
-	movl	24(%edx), %esi
-	movl	28(%edx), %ebp
-	movl	%esp, %ecx		 
-	movl	72(%edx), %esp		 
-	pushl	60(%edx)	/* eip */	 
-	pushl	44(%edx)	/* ecx */	 
-	pushl	48(%edx)	/* eax */	 
-	movl	36(%edx), %ebx		 
-	movl	40(%edx), %edx
-	movl	12(%ecx), %eax		 
-	popl	%eax			 
-	popl	%ecx
-	ret
+/*
+ * Copyright (c) 2000 Peter Wemm <peter@FreeBSD.org>
+ * All rights reserved.
+ *
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+ */
+
+#include <sys/syscall.h>
+#include <machine/asm.h>
+
+ENTRY(rfork_thread)
+	pushl   %ebp
+	movl    %esp, %ebp
+	pushl   %esi
+
+	/*
+	* Push thread info onto the new thread's stack
+	*/
+	movl    12(%ebp), %esi  # get stack addr
 
-.globl getmcontext
-getmcontext:
-	pushl	%edx
-	movl	8(%esp), %edx
-	movl	%fs, 8(%edx)
-	movl	%es, 12(%edx)
-	movl	%ds, 16(%edx)
-	movl	%ss, 76(%edx)
-	movl	%edi, 20(%edx)
-	movl	%esi, 24(%edx)
-	movl	%ebp, 28(%edx)
-	movl	%ebx, 36(%edx)
-	movl	$1, 48(%edx)
-	popl	%eax
-	movl	%eax, 40(%edx)		 
-	movl	%ecx, 44(%edx)
-	movl	(%esp), %eax	/* eip */		 
-	movl	%eax, 60(%edx)		 
-	movl	%esp, %eax		 
-	addl	$4, %eax	/* setmcontext will re-push the eip */	 
-	movl	%eax, 72(%edx)
-	movl	40(%edx), %edx		 
-	xorl	%eax, %eax		 
+	subl    $4, %esi
+	movl    20(%ebp), %eax  # get start argument
+	movl    %eax, (%esi)
+
+	subl    $4, %esi
+	movl    16(%ebp), %eax  # get start thread address
+	movl    %eax, (%esi)
+
+	/*
+	* Prepare and execute the thread creation syscall
+	*/
+	pushl   8(%ebp)
+	pushl   $0
+	movl    $SYS_rfork, %eax
+	int     $0x80
+	jb      2f
+
+	/*
+	* Check to see if we are in the parent or child
+	*/
+	cmpl    $0, %edx
+	jnz     1f
+	addl    $8, %esp
+	popl    %esi
+	movl    %ebp, %esp
+	popl    %ebp
 	ret
+	.p2align 2
+
+	/*
+	* If we are in the child (new thread), then
+	* set-up the call to the internal subroutine.  If it
+	* returns, then call __exit.
+	*/
+1:
+	movl    %esi,%esp
+	popl    %eax
+	call    *%eax
+	addl    $4, %esp
+
+	/*
+	* Exit system call
+	*/
+	pushl   %eax
+	pushl   $0
+	movl    $SYS_exit, %eax
+	int     $0x80
 
+	/*
+	* Branch here if the thread creation fails:
+	*/
+2:
+	addl    $8, %esp
+	popl    %esi
+	movl    %ebp, %esp
+	popl    %ebp
+	PIC_PROLOGUE
+	jmp     PIC_PLT(_C_LABEL(__cerror))
\ No newline at end of file