/* * MIPS o32 Linux syscall example * * http://www.linux-mips.org/wiki/RISC/os * http://www.linux-mips.org/wiki/MIPSABIHistory * http://www.linux.com/howtos/Assembly-HOWTO/mips.shtml * * mipsel-linux-gcc -nostdlib -mno-abicalls -fno-PIC -mabi=32 \ * -O2 -static -o hello-mips hello-mips.c * */ #define __NR_SYSCALL_BASE 4000 #define __NR_exit (__NR_SYSCALL_BASE+ 1) #define __NR_write (__NR_SYSCALL_BASE+ 4) static inline void exit1(int status) { register unsigned long __a0 asm("$4") = (unsigned long) status; __asm__ __volatile__ ( " .set push \n" " .set noreorder \n" " li $2, %0 \n" " syscall \n" " .set pop " : : "i" (__NR_exit), "r" (__a0) : "$2", "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", "$24", "memory"); } static inline int write(int fd, const char *buf, int len) { register unsigned long __a0 asm("$4") = (unsigned long) fd; register unsigned long __a1 asm("$5") = (unsigned long) buf; register unsigned long __a2 asm("$6") = (unsigned long) len; register unsigned long __a3 asm("$7"); unsigned long __v0; __asm__ __volatile__ ( " .set push \n" " .set noreorder \n" " li $2, %2 \n" " syscall \n" " move %0, $2 \n" " .set pop " : "=r" (__v0), "=r" (__a3) : "i" (__NR_write), "r" (__a0), "r" (__a1), "r" (__a2) : "$2", "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", "$24", "memory"); /* if (__a3 == 0) */ return (int) __v0; /* errno = __v0; return -1; */ } void __start(void) { write (1, "Hello, World!\n", 14); exit1 (42); }