use clone syscall for vfork

Signed-off-by: Mark Salter <msalter@redhat.com>
Signed-off-by: Bernd Schmidt <bernds@codesourcery.com>

diff --git a/libc/sysdeps/linux/c6x/_vfork.S b/libc/sysdeps/linux/c6x/_vfork.S
index 20cb6a5..d64dc50 100644 (file)
--- a/libc/sysdeps/linux/c6x/_vfork.S
+++ b/libc/sysdeps/linux/c6x/_vfork.S
@@ -1,55 +1,66 @@
- ;
- ; Port of uClibc for TMS320C6000 DSP architecture
- ; Copyright (C) 2004 Texas Instruments Incorporated
- ; Author of TMS320C6000 port: Aurelien Jacquiot
- ;
- ; This program 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.
- ;
- ; This program 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.
- ;
- ; You should have received a copy of the GNU Library General Public License
- ; along with this program; if not, write to the Free Software Foundation,
- ; Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- ;
+/*
+ * Port of uClibc for TMS320C6000 DSP architecture
+ * Copyright (C) 2004, 2011 Texas Instruments Incorporated
+ * Author of TMS320C6000 port: Aurelien Jacquiot
+ *
+ *   Use clone syscall: Mark Salter <msalter@redhat.com>
+ *
+ * This program 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.
+ *
+ * This program 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.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#define __ASSEMBLY__
 
-;      .import __errno_location
-       .global __vfork
+#include <asm/errno.h>
+#include <sys/syscall.h>
+#include <linux/sched.h>
+#include <asm/signal.h>
 
+#define CLONE_FLAGS (CLONE_VFORK | CLONE_VM | SIGCHLD)
+       
+       .global __vfork
 __vfork:
-       MVK .S2 190,B0          ; __NR_vfork
+       MVK     .S2     SYS_clone,B0
+ ||    MVKL    .S1     CLONE_FLAGS,A4
+       MVKH    .S1     CLONE_FLAGS,A4
+ ||    MVK     .L2     0,B4
 #ifndef        _TMS320C6400_PLUS
-       MVC .S2     CSR,B2
-       CLR .S2     B2,0,0,B1
-       MVC .S2     B1,CSR
-       MVC .S2     IFR,B1
-       SET .S2     B1,6,6,B1
-       MVC .S2     B1,ISR
-       MVC .S2     B2,CSR
+       MVC     .S2     CSR,B2
+       CLR     .S2     B2,0,0,B1
+       MVC     .S2     B1,CSR
+       MVC     .S2     IFR,B1
+       SET     .S2     B1,6,6,B1
+       MVC     .S2     B1,ISR
+       MVC     .S2     B2,CSR
        NOP
 #else
        SWE
 #endif
 
-       MVK .S2 -4096,B4
-       CMPGTU .L2X     B4,A4,B2        ; check error
- [B2]  BNOP .S2        B3,5
+       MVK     .S2     -4096,B4
+       CMPGTU  .L2X    B4,A4,B2        ; check error
+  [B2] BNOP    .S2     B3,5
 
-       NEG .S1 A4,A4
-       STW .D2T1       A4,*B15--[2]
-       STW .D2T2       B3,*+B15[1]
-       CALLP .S2       __errno_location,B3
-       LDW .D2T2       *+B15[1],B3
-       LDW .D2T1       *++B15[2],A5
+       NEG     .S1     A4,A4
+       STW     .D2T1   A4,*B15--[2]
+       STW     .D2T2   B3,*+B15[1]
+       CALLP   .S2     __errno_location,B3
+       LDW     .D2T2   *+B15[1],B3
+       LDW     .D2T1   *++B15[2],A5
        NOP     3
-       BNOP .S2        B3,3
-       STW .D1T1       A5,*A4
-       MVK .L1 -1,A4
+       BNOP    .S2     B3,3
+       STW     .D1T1   A5,*A4
+       MVK     .L1     -1,A4
 
 weak_alias(__vfork,vfork)
 libc_hidden_weak(vfork)