1 /* syscall for arm/uClibc
2 *
3 * Copyright (C) 2002 by Erik Andersen <andersen@uclibc.org>
4 *
5 * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
6 */
7
8 #include <features.h>
9 #include <errno.h>
10 #include <sys/types.h>
11 #include <sys/syscall.h>
12
13
syscall(long sysnum,long a,long b,long c,long d,long e,long f)14 long syscall(long sysnum, long a, long b, long c, long d, long e, long f)
15 {
16 #if !defined(__thumb__)
17 register long _r0 __asm__("r0")=(long)(sysnum);
18 register long _r6 __asm__("r6")=(long)(f);
19 register long _r5 __asm__("r5")=(long)(e);
20 register long _r4 __asm__("r4")=(long)(d);
21 register long _r3 __asm__("r3")=(long)(c);
22 register long _r2 __asm__("r2")=(long)(b);
23 register long _r1 __asm__("r1")=(long)(a);
24 __asm__ __volatile__(
25 "swi %1"
26 : "=r"(_r0)
27 : "i"(__NR_syscall), "r"(_r0), "r"(_r1),
28 "r"(_r2), "r"(_r3), "r"(_r4), "r"(_r5),
29 "r"(_r6)
30 : "memory");
31 #else
32 register long _r7 __asm__("r7")=(long)(sysnum);
33 register long _r5 __asm__("r5")=(long)(f);
34 register long _r4 __asm__("r4")=(long)(e);
35 register long _r3 __asm__("r3")=(long)(d);
36 register long _r2 __asm__("r2")=(long)(c);
37 register long _r1 __asm__("r1")=(long)(b);
38 register long _r0 __asm__("r0")=(long)(a);
39 __asm__ __volatile__(
40 "swi 0"
41 : "=r"(_r0)
42 : "r"(_r0), "r"(_r1), "r"(_r2), "r"(_r3),
43 "r"(_r4), "r"(_r5), "r"(_r7)
44 : "memory");
45 #endif
46 if(_r0 >=(unsigned long) -4095) {
47 long err = _r0;
48 (*__errno_location())=(-err);
49 _r0=(unsigned long) -1;
50 }
51 return (long) _r0;
52 }
53