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authorSteven J. Magnani <steve@digidescorp.com>2010-11-10 19:30:02 +0100
committerBernhard Reutner-Fischer <rep.dot.nop@gmail.com>2010-11-10 19:44:36 +0100
commit975ce6359486ec3d2905e57d11ef22088b04b85f (patch)
tree871ba21eb1aa24948748ae53162b588aeb118e46 /libc/sysdeps/linux/microblaze
parent54f73a98f6b841f05484e2275c860ae61d49aae2 (diff)
microblaze: vfork/clone interface
Fix the microblaze vfork() and clone() implementations. Add support for clone2(). Signed-off-by: Steven J. Magnani <steve@digidescorp.com> Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
Diffstat (limited to 'libc/sysdeps/linux/microblaze')
-rw-r--r--libc/sysdeps/linux/microblaze/clone.c71
-rw-r--r--libc/sysdeps/linux/microblaze/vfork.S30
2 files changed, 49 insertions, 52 deletions
diff --git a/libc/sysdeps/linux/microblaze/clone.c b/libc/sysdeps/linux/microblaze/clone.c
index a47ee8c68..d92100865 100644
--- a/libc/sysdeps/linux/microblaze/clone.c
+++ b/libc/sysdeps/linux/microblaze/clone.c
@@ -1,52 +1,47 @@
/*
- * libc/sysdeps/linux/microblaze/clone.c -- `clone' syscall for linux/microblaze
+ * Copyright (C) 2004 Atmel Corporation
*
- * Copyright (C) 2003 John Williams <jwilliams@itee.uq.edu.au>
- * Copyright (C) 2002,03 NEC Electronics Corporation
- * Copyright (C) 2002,03 Miles Bader <miles@gnu.org>
- *
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License. See the file COPYING.LIB in the main
- * directory of this archive for more details.
- *
- * Written by Miles Bader <miles@gnu.org>
- * Microblaze port by John Williams
+ * This file is subject to the terms and conditions of the GNU Lesser General
+ * Public License. See the file "COPYING.LIB" in the main directory of this
+ * archive for more details.
*/
-
+#include <sched.h>
#include <errno.h>
#include <sys/syscall.h>
+#include <unistd.h>
-int
-clone (int (*fn)(void *arg), void *child_stack, int flags, void *arg)
+int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg, ...)
{
- register unsigned long rval __asm__ (SYSCALL_RET) = -EINVAL;
+ int rval = -EINVAL;
+ if (fn && child_stack)
+ rval = INTERNAL_SYSCALL(clone, 0, 2, flags, child_stack);
+
+ if (rval == 0)
+ {
+ int exitCode = fn(arg);
+ rval = INTERNAL_SYSCALL(exit, 0, 1, exitCode);
+ }
- if (fn && child_stack)
- {
- register unsigned long syscall __asm__ (SYSCALL_NUM);
- register unsigned long arg0 __asm__ (SYSCALL_ARG0);
- register unsigned long arg1 __asm__ (SYSCALL_ARG1);
+ return rval;
+}
- /* Clone this thread. */
- arg0 = flags;
- arg1 = (unsigned long)child_stack;
- syscall = __NR_clone;
- __asm__ __volatile__ ("bralid r17, trap;nop;"
- : "=r" (rval), "=r" (syscall)
- : "1" (syscall), "r" (arg0), "r" (arg1)
- : SYSCALL_CLOBBERS);
+#ifdef __NR_clone2
+int
+__clone2(int (*fn)(void *arg), void *child_stack, size_t stack_size,
+ int flags, void *arg, ...)
+{
+ int rval = -EINVAL;
+ if (fn && child_stack)
+ {
+ rval = INTERNAL_SYSCALL(clone2, 0, 3, flags, child_stack, stack_size);
+ }
- if (rval == 0)
- /* In child thread, call FN and exit. */
+ if (rval == 0)
{
- arg0 = (*fn) (arg);
- syscall = __NR_exit;
- __asm__ __volatile__ ("bralid r17, trap;nop;"
- : "=r" (rval), "=r" (syscall)
- : "1" (syscall), "r" (arg0)
- : SYSCALL_CLOBBERS);
+ int exitCode = fn(arg);
+ rval = INTERNAL_SYSCALL(exit, 0, 1, exitCode);
}
- }
- __syscall_return (int, rval);
+ return rval;
}
+#endif
diff --git a/libc/sysdeps/linux/microblaze/vfork.S b/libc/sysdeps/linux/microblaze/vfork.S
index 42458308a..c4b4dbf2f 100644
--- a/libc/sysdeps/linux/microblaze/vfork.S
+++ b/libc/sysdeps/linux/microblaze/vfork.S
@@ -1,14 +1,14 @@
/*
* libc/sysdeps/linux/microblaze/vfork.S -- `vfork' syscall for linux/microblaze
*
+ * Copyright (C) 2003 John Williams <jwilliams@itee.uq.edu.au>
* Copyright (C) 2001 NEC Corporation
* Copyright (C) 2001 Miles Bader <miles@gnu.org>
- * Copyright (C) 2003 John Williams <jwilliams@itee.uq.edu.au>
- * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
*
- * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
- */
-/*
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License. See the file COPYING.LIB in the main
+ * directory of this archive for more details.
+ *
* Written by Miles Bader <miles@gnu.org>
* Microblaze port by John Williams
*/
@@ -18,7 +18,7 @@
#define _SYSCALL_H
#include <bits/sysnum.h>
-#include <clinkage.h>
+#include <libc-symbols.h>
/* Clone the calling process, but without copying the whole address space.
The calling process is suspended until the new process exits or is
@@ -27,18 +27,20 @@
.global C_SYMBOL_NAME(errno)
-C_ENTRY (__vfork):
+ .globl __vfork
+ .align 4
+__vfork:
addi r12, r0, SYS_vfork
- bralid r17, 0x08;
- nop
+ brki r14, 0x08;
addi r4, r3, 125 /* minimum err value */
blti r4, 1f /* is r3 < -125? */
- rtsd r15, 8 /* normal return */
- nop
-1: sub r3, r3, r0 /* r3 = -r3 */
+ bri 2f /* normal return */
+1: sub r3, r3, r0 /* r3 = -r3 */
swi r3, r0, C_SYMBOL_NAME(errno);
- rtsd r15, 8 /* error return */
+ /* state restore etc */
+2: rtsd r15, 8 /* error return */
nop
-C_END(__vfork)
+ .size __vfork, .-__vfork
+
weak_alias(__vfork,vfork)
libc_hidden_weak(vfork)