tests/hello-arm.c

   1 #define __NR_SYSCALL_BASE       0x900000
   2 #define __NR_exit1                      (__NR_SYSCALL_BASE+  1)
   3 #define __NR_write                      (__NR_SYSCALL_BASE+  4)
   4
   5 #define __sys2(x) #x
   6 #define __sys1(x) __sys2(x)
   7
   8 #ifndef __syscall
   9 #define __syscall(name) "swi\t" __sys1(__NR_##name) "\n\t"
  10 #endif
  11
  12 #define __syscall_return(type, res)                                     \
  13 do {                                                                    \
  14         return (type) (res);                                            \
  15 } while (0)
  16
  17 #define _syscall0(type,name)                                            \
  18 type name(void) {                                                       \
  19   long __res;                                                           \
  20   __asm__ __volatile__ (                                                \
  21   __syscall(name)                                                       \
  22   "mov %0,r0"                                                           \
  23   :"=r" (__res) : : "r0","lr");                                         \
  24   __syscall_return(type,__res);                                         \
  25 }
  26
  27 #define _syscall1(type,name,type1,arg1)                                 \
  28 type name(type1 arg1) {                                                 \
  29   long __res;                                                           \
  30   __asm__ __volatile__ (                                                \
  31   "mov\tr0,%1\n\t"                                                      \
  32   __syscall(name)                                                       \
  33   "mov %0,r0"                                                           \
  34         : "=r" (__res)                                                  \
  35         : "r" ((long)(arg1))                                            \
  36         : "r0","lr");                                                   \
  37   __syscall_return(type,__res);                                         \
  38 }
  39
  40 #define _syscall2(type,name,type1,arg1,type2,arg2)                      \
  41 type name(type1 arg1,type2 arg2) {                                      \
  42   long __res;                                                           \
  43   __asm__ __volatile__ (                                                \
  44   "mov\tr0,%1\n\t"                                                      \
  45   "mov\tr1,%2\n\t"                                                      \
  46   __syscall(name)                                                       \
  47   "mov\t%0,r0"                                                          \
  48         : "=r" (__res)                                                  \
  49         : "r" ((long)(arg1)),"r" ((long)(arg2))                         \
  50         : "r0","r1","lr");                                              \
  51   __syscall_return(type,__res);                                         \
  52 }
  53
  54
  55 #define _syscall3(type,name,type1,arg1,type2,arg2,type3,arg3)           \
  56 type name(type1 arg1,type2 arg2,type3 arg3) {                           \
  57   long __res;                                                           \
  58   __asm__ __volatile__ (                                                \
  59   "mov\tr0,%1\n\t"                                                      \
  60   "mov\tr1,%2\n\t"                                                      \
  61   "mov\tr2,%3\n\t"                                                      \
  62   __syscall(name)                                                       \
  63   "mov\t%0,r0"                                                          \
  64         : "=r" (__res)                                                  \
  65         : "r" ((long)(arg1)),"r" ((long)(arg2)),"r" ((long)(arg3))      \
  66         : "r0","r1","r2","lr");                                         \
  67   __syscall_return(type,__res);                                         \
  68 }
  69
  70
  71 #define _syscall4(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4)                \
  72 type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4) {                             \
  73   long __res;                                                                           \
  74   __asm__ __volatile__ (                                                                \
  75   "mov\tr0,%1\n\t"                                                                      \
  76   "mov\tr1,%2\n\t"                                                                      \
  77   "mov\tr2,%3\n\t"                                                                      \
  78   "mov\tr3,%4\n\t"                                                                      \
  79   __syscall(name)                                                                       \
  80   "mov\t%0,r0"                                                                          \
  81         : "=r" (__res)                                                                  \
  82         : "r" ((long)(arg1)),"r" ((long)(arg2)),"r" ((long)(arg3)),"r" ((long)(arg4))   \
  83         : "r0","r1","r2","r3","lr");                                                    \
  84   __syscall_return(type,__res);                                                         \
  85 }
  86
  87
  88 #define _syscall5(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4,type5,arg5)     \
  89 type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4, type5 arg5) {                 \
  90   long __res;                                                                           \
  91   __asm__ __volatile__ (                                                                \
  92   "mov\tr0,%1\n\t"                                                                      \
  93   "mov\tr1,%2\n\t"                                                                      \
  94   "mov\tr2,%3\n\t"                                                                      \
  95   "mov\tr3,%4\n\t"                                                                      \
  96   "mov\tr4,%5\n\t"                                                                      \
  97   __syscall(name)                                                                       \
  98   "mov\t%0,r0"                                                                          \
  99         : "=r" (__res)                                                                  \
 100         : "r" ((long)(arg1)),"r" ((long)(arg2)),"r" ((long)(arg3)),"r" ((long)(arg4)),  \
 101           "r" ((long)(arg5))                                                            \
 102         : "r0","r1","r2","r3","r4","lr");                                               \
 103   __syscall_return(type,__res);                                                         \
 104 }
 105
 106 _syscall1(int,exit1,int,status);
 107 _syscall3(int,write,int,fd,const char *,buf, int, len);
 108
 109 void _start(void)
 110 {
 111     write(1, "Hello World\n", 12);
 112     exit1(0);
 113 }