[uClibc-cvs] uClibc/libc/sysdeps/linux/i386 clone.S,1.6,1.7

[Erik Andersen]

Update of /var/cvs/uClibc/libc/sysdeps/linux/i386
In directory winder:/tmp/cvs-serv15403/libc/sysdeps/linux/i386

Modified Files:
	clone.S 
Log Message:
Clone still had a few little PIC problems....


Index: clone.S
===================================================================
RCS file: /var/cvs/uClibc/libc/sysdeps/linux/i386/clone.S,v
retrieving revision 1.6
retrieving revision 1.7
diff -u -d -r1.6 -r1.7
--- clone.S	30 May 2003 04:47:44 -0000	1.6
+++ clone.S	30 May 2003 05:51:40 -0000	1.7
@@ -1,75 +1,122 @@
-/* Copyright (C) 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
+/* Copyright (C) 1996, 1997,98,99,2000,02 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Richard Henderson (rth at tamu.edu)
 
    The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Library General Public License as
-   published by the Free Software Foundation; either version 2 of the
-   License, or (at your option) any later version.
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
 
    The GNU C Library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Library General Public License for more details.
+   Lesser General Public License for more details.
 
-   You should have received a copy of the GNU Library General Public
-   License along with the GNU C Library; see the file COPYING.LIB.  If not,
-   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-   Boston, MA 02111-1307, USA.  */
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
 
 /* clone() is even more special than fork() as it mucks with stacks
-   and invokes a function in the right context after its all over.  */
+   and invokes a function in the right context after its all over.  
+   
+   Hacked up for uClibc by Erik Andersen <andersen at codepoet.org>
+*/
 
+#define _ERRNO_H	1
 #include <bits/errno.h>
 #include <sys/syscall.h>
 
-.text
-.align 4
-.type	__clone, at function
-.globl	__clone;
+#define LINKAGE     4
+#define PTR_SIZE    4
+#define PARMS       LINKAGE        /* no space for saved regs */
+#define FUNC        PARMS
+#define STACK       FUNC+4
+#define FLAGS       STACK+PTR_SIZE
+#define ARG         FLAGS+4
+#define PTID        ARG+PTR_SIZE
+#define TLS         PTID+PTR_SIZE
+#define CTID        TLS+PTR_SIZE
+
+
+        .text
+	.globl __clone;
+	.type __clone, at function;
+	.align 1<<4;
+
 __clone:
 	/* Sanity check arguments.  */
-	movl	4(%esp),%ecx		/* no NULL function pointers */
-	jecxz	CLONE_ERROR_LABEL
-
-	movl	8(%esp),%ecx		/* no NULL stack pointers */
-	jecxz	CLONE_ERROR_LABEL
+	movl	$-EINVAL,%eax
+	movl	FUNC(%esp),%ecx		/* no NULL function pointers */
+#ifdef __PIC__
+	jecxz	__syscall_error
+#else
+	testl	%ecx,%ecx
+	jz	__syscall_error
+#endif
+	movl	STACK(%esp),%ecx	/* no NULL stack pointers */
+#ifdef __PIC__
+	jecxz	__syscall_error
+#else
+	testl	%ecx,%ecx
+	jz	__syscall_error
+#endif
 
 	/* Insert the argument onto the new stack.  */
-	subl	$8,%ecx
-	movl	16(%esp),%eax		/* no negative argument counts */
-	movl	%eax,4(%ecx)
+	subl	$16,%ecx
+	movl	ARG(%esp),%eax		/* no negative argument counts */
+	movl	%eax,12(%ecx)
 
 	/* Save the function pointer as the zeroth argument.
 	   It will be popped off in the child in the ebx frobbing below.  */
-	movl	4(%esp),%eax
-	movl	%eax,0(%ecx)
+	movl	FUNC(%esp),%eax
+	movl	%eax,8(%ecx)
+	/* Don't leak any information.  */
+	movl	$0,4(%ecx)
+	movl	$0,(%ecx)
 
 	/* Do the system call */
 	pushl	%ebx
-	movl	16(%esp),%ebx
+	pushl	%esi
+	pushl	%edi
+	movl	TLS+12(%esp),%esi
+	movl	PTID+12(%esp),%edx
+	movl	FLAGS+12(%esp),%ebx
+	movl	CTID+12(%esp),%edi
 	movl	$__NR_clone,%eax
 	int	$0x80
+	popl	%edi
+	popl	%esi
 	popl	%ebx
 
 	test	%eax,%eax
-	jl	CLONE_ERROR_LABEL
-	jne	CLONE_RETURN_LABEL
+	jl	__syscall_error
+	jz	.Lthread_start
 
-	/* Start thread */
+.Lpseudo_end:
+	ret
+
+.Lthread_start:
 	subl	%ebp,%ebp	/* terminate the stack frame */
 	call	*%ebx
-	pushl	%eax
-	call	_exit
+#ifdef __PIC__
+	call	.Lhere
+.Lhere:
+	popl	%ebx
+	addl	$_GLOBAL_OFFSET_TABLE_+[.-.Lhere], %ebx
+#endif
+	movl	%eax, %ebx
+	movl	$__NR_exit, %eax
+	int	$0x80
 
-CLONE_ERROR_LABEL:
+__syscall_error:
 	negl    %eax
 	pushl   %eax
 #ifdef __PIC__
-	call .Lhere
-.Lhere:
+	call .Lthere
+.Lthere:
 	popl	%ebx
-	addl	$_GLOBAL_OFFSET_TABLE_+[.- .Lhere  ], %ebx
+	addl	$_GLOBAL_OFFSET_TABLE_+[.- .Lthere  ], %ebx
 	call    __errno_location at PLT
 #else
 	call	__errno_location
@@ -79,9 +126,7 @@
 	xorl	%eax, %eax
 	decl	%eax
 
-CLONE_RETURN_LABEL:
-	ret
-
-.globl	clone;
-    clone = __clone
+.Lsize:
+	.size	 __clone,.Lsize-__clone
 
+.weak clone ; clone = __clone