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/*
* 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);
}
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