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authorKhem Raj <raj.khem@gmail.com>2009-09-06 01:02:02 -0700
committerKhem Raj <raj.khem@gmail.com>2009-09-06 01:02:50 -0700
commit3e151bdde55f608385099d761a22c2e8951448b0 (patch)
treeeb5cd670707f50fe7050793ab977c94d2924d899 /libc/sysdeps/linux/arm/syscall.c
parent6943b8336ed253a2ad90816f8d16aa392d0de606 (diff)
Revert "syscall.c: Use common syscall.c for ARM"
This reverts commit b1913a876059949e6c309bafade55e9425ef33fb. OABI is still a requirement. So we override the common syscall implementation specifically for arm port. Signed-off-by: Khem Raj <raj.khem@gmail.com>
Diffstat (limited to 'libc/sysdeps/linux/arm/syscall.c')
-rw-r--r--libc/sysdeps/linux/arm/syscall.c53
1 files changed, 53 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/arm/syscall.c b/libc/sysdeps/linux/arm/syscall.c
new file mode 100644
index 000000000..60fbcf89b
--- /dev/null
+++ b/libc/sysdeps/linux/arm/syscall.c
@@ -0,0 +1,53 @@
+/* vi: set sw=4 ts=4: */
+/* syscall for arm/uClibc
+ *
+ * Copyright (C) 2002 by Erik Andersen <andersen@uclibc.org>
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#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)
+{
+#if !defined(__thumb__)
+ 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)
+ : "memory");
+#else
+ register long _r7 __asm__("r7")=(long)(sysnum);
+ register long _r5 __asm__("r5")=(long)(f);
+ register long _r4 __asm__("r4")=(long)(e);
+ register long _r3 __asm__("r3")=(long)(d);
+ register long _r2 __asm__("r2")=(long)(c);
+ register long _r1 __asm__("r1")=(long)(b);
+ register long _r0 __asm__("r0")=(long)(a);
+ __asm__ __volatile__(
+ "swi 0"
+ : "=r"(_r0)
+ : "r"(_r0), "r"(_r1), "r"(_r2), "r"(_r3),
+ "r"(_r4), "r"(_r5), "r"(_r7)
+ : "memory");
+#endif
+ if(_r0 >=(unsigned long) -4095) {
+ long err = _r0;
+ (*__errno_location())=(-err);
+ _r0=(unsigned long) -1;
+ }
+ return (long) _r0;
+}