hello-arm.c (3277B)
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 }