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