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authorEric Andersen <andersen@codepoet.org>2002-07-25 09:16:48 +0000
committerEric Andersen <andersen@codepoet.org>2002-07-25 09:16:48 +0000
commit8cfe720a244ab093efaa64e9cd3dc2fffc7cb4ec (patch)
tree4ec85d06986ae808d8c7252c8947b831d6bbf062
parentc5568de190ec2806ce36e063865bfee66d30d032 (diff)
Implement syscall() for arm
-Erik
-rw-r--r--libc/sysdeps/linux/arm/Makefile2
-rw-r--r--libc/sysdeps/linux/arm/syscall.c49
2 files changed, 50 insertions, 1 deletions
diff --git a/libc/sysdeps/linux/arm/Makefile b/libc/sysdeps/linux/arm/Makefile
index c5a96dea8..950cf660e 100644
--- 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
index 000000000..92a535e23
--- /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 <andersen@uclibc.org>
+ *
+ * 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;
+}
+