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#include <syscall_int.h>
// int thread_fork(tcb_t* tcb,
// void* (*f)(void*),
// void* args);
.global thread_fork
.type thread_fork, %function
thread_fork:
mov 0x4(%esp), %edi // tcb
mov 0x8(%esp), %esi // f
mov 0xc(%esp), %edx // arg
int $THREAD_FORK_INT
cmp $0, %eax
jne .parent // both failure and success returns non-zero for parent
mov 0x8(%edi), %esp // read tcb.stack_hi and set stack
push %edx
push %esi
call thr_begin // thread entry point and this will not return
.parent:
ret
.global get_esp
.type get_esp, %function
get_esp:
lea -0x4(%esp), %eax
ret
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