44 lines
846 B
C
44 lines
846 B
C
#if defined(__mips__)
|
|
#include <stdint.h>
|
|
|
|
void exit(int8_t status){
|
|
asm (
|
|
"move $a0, %0\n"
|
|
"li $v0, 4001\n"
|
|
"syscall\n"
|
|
:
|
|
: "r" (status)
|
|
: "a0", "v0"
|
|
);
|
|
}
|
|
|
|
intptr_t write(int32_t fd, const void* buf, intptr_t size){
|
|
intptr_t n_written = 0;
|
|
asm (
|
|
"li $a0, 1\n"
|
|
"move $a1, %0\n"
|
|
"move $a2, %1\n"
|
|
"li $v0, 4004\n"
|
|
"syscall\n"
|
|
: //TODO: n_written
|
|
: "r"(buf), "r"(count)
|
|
: "a0", "a1", "a2", "v0" //TODO: temp registers clobbered by syscall should probably also be listed but this fn returns right away so it should be fine?
|
|
);
|
|
return n_written;
|
|
}
|
|
//intptr_t read(int32_t fd, const void* buf, intptr_t size);
|
|
|
|
uint32_t fork(){
|
|
int rtn;
|
|
asm (
|
|
"li $v0, 4002\n"
|
|
"syscall\n"
|
|
"move %0, $v0"
|
|
:"=r" (rtn)
|
|
:
|
|
: "a0", "v0"
|
|
);
|
|
return (uint32_t)rtn;
|
|
}
|
|
#endif
|