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#define ASM_FILE 1
#include <camellia/syscalls.h>
#include <camellia/flags.h>
.section .text
.global thread_creates
.type thread_creates, @function
// void thread_creates(int flags, void (*fn)(void*), void *arg, void *stack);
thread_creates:
push %r12
push %r13
push %r14
/* save fn, arg, stack */
mov %rsi, %r12
mov %rdx, %r13
mov %rcx, %r14
mov %rdi, %rsi
or $(FORK_SHAREMEM | FORK_SHAREHANDLE), %rsi
mov $_SYSCALL_FORK, %rdi
xor %rdx, %rdx
syscall
test %rax, %rax
jz 1f
/* in parent, return normally */
pop %r14
pop %r13
pop %r12
ret
1: /* in child */
mov %r14, %rsp
mov %r13, %rdi
call *%r12
mov $_SYSCALL_EXIT, %rdi
xor %rsi, %rsi
syscall
hlt /* if all else fails... */
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