Implement syscall() for arm

 -Erik

diff --git a/libc/sysdeps/linux/arm/Makefile b/libc/sysdeps/linux/arm/Makefile
index c5a96dea8621cb599ba7e2e8314a349c02e3570e..950cf660ecabdda0e6419fa25bb868d2e0483bfe 100644 (file)
--- a/libc/sysdeps/linux/arm/Makefile
+++ b/libc/sysdeps/linux/arm/Makefile
@@ -33,7 +33,7 @@ CRT0_OBJ=crt0.o
 SSRC=__longjmp.S vfork.S clone.S setjmp.S bsd-setjmp.S bsd-_setjmp.S
 SOBJS=$(patsubst %.S,%.o, $(SSRC))
 
-CSRC=inout_bwl.c brk.c
+CSRC=inout_bwl.c brk.c syscall.c
 COBJS=$(patsubst %.c,%.o, $(CSRC))
 
 OBJS=$(SOBJS) $(MOBJ) $(COBJS)

diff --git a/libc/sysdeps/linux/arm/syscall.c b/libc/sysdeps/linux/arm/syscall.c
new file mode 100644 (file)
index 0000000..92a535e
--- /dev/null
+++ b/libc/sysdeps/linux/arm/syscall.c
@@ -0,0 +1,49 @@
+/* vi: set sw=4 ts=4: */
+/* syscall for arm/uClibc
+ *
+ * Copyright (C) 2002 by Erik Andersen <[email protected]>
+ *
+ * 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
+ */
+
+#include <features.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/syscall.h>
+
+
+long syscall(long sysnum, long a, long b, long c, long d, long e, long f)
+{
+    register long _r0 asm("r0")=(long)(sysnum);
+    register long _r6 asm("r6")=(long)(f);
+    register long _r5 asm("r5")=(long)(e);
+    register long _r4 asm("r4")=(long)(d);
+    register long _r3 asm("r3")=(long)(c);
+    register long _r2 asm("r2")=(long)(b);
+    register long _r1 asm("r1")=(long)(a);
+    asm volatile(
+           "swi %1"
+           : "=r"(_r0)
+           : "i"(__NR_syscall), "r"(_r0), "r"(_r1),
+             "r"(_r2), "r"(_r3), "r"(_r4), "r"(_r5),
+             "r"(_r6)
+           : "r0", "memory");
+    if(_r0 >=(unsigned long) -4095) {
+       (*__errno_location())=(-_r0);
+       _r0=(unsigned long) -1;
+    }
+    return (long) _r0;
+}
+