hello-mips.c (1699B)
1 /* 2 * MIPS o32 Linux syscall example 3 * 4 * http://www.linux-mips.org/wiki/RISC/os 5 * http://www.linux-mips.org/wiki/MIPSABIHistory 6 * http://www.linux.com/howtos/Assembly-HOWTO/mips.shtml 7 * 8 * mipsel-linux-gcc -nostdlib -mno-abicalls -fno-PIC -mabi=32 \ 9 * -O2 -static -o hello-mips hello-mips.c 10 * 11 */ 12 #define __NR_SYSCALL_BASE 4000 13 #define __NR_exit (__NR_SYSCALL_BASE+ 1) 14 #define __NR_write (__NR_SYSCALL_BASE+ 4) 15 16 static inline void exit1(int status) 17 { 18 register unsigned long __a0 asm("$4") = (unsigned long) status; 19 20 __asm__ __volatile__ ( 21 " .set push \n" 22 " .set noreorder \n" 23 " li $2, %0 \n" 24 " syscall \n" 25 " .set pop " 26 : 27 : "i" (__NR_exit), "r" (__a0) 28 : "$2", "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", "$24", 29 "memory"); 30 } 31 32 static inline int write(int fd, const char *buf, int len) 33 { 34 register unsigned long __a0 asm("$4") = (unsigned long) fd; 35 register unsigned long __a1 asm("$5") = (unsigned long) buf; 36 register unsigned long __a2 asm("$6") = (unsigned long) len; 37 register unsigned long __a3 asm("$7"); 38 unsigned long __v0; 39 40 __asm__ __volatile__ ( 41 " .set push \n" 42 " .set noreorder \n" 43 " li $2, %2 \n" 44 " syscall \n" 45 " move %0, $2 \n" 46 " .set pop " 47 : "=r" (__v0), "=r" (__a3) 48 : "i" (__NR_write), "r" (__a0), "r" (__a1), "r" (__a2) 49 : "$2", "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", "$24", 50 "memory"); 51 52 /* if (__a3 == 0) */ 53 return (int) __v0; 54 /* 55 errno = __v0; 56 return -1; 57 */ 58 } 59 60 void __start(void) 61 { 62 write (1, "Hello, World!\n", 14); 63 exit1(0); 64 }