kaguya
53 lines
1.3 KiB
C++
53 lines
1.3 KiB
C++
#include <sys/mman.h>
|
|
#include <mlibc/debug.hpp>
|
|
#include <errno.h>
|
|
#include <mlibc/all-sysdeps.hpp>
|
|
#include <bits/ensure.h>
|
|
#include <mlibc/tcb.hpp>
|
|
#include <mlibc/arch-defs.hpp>
|
|
|
|
extern "C" void __mlibc_thread_trampoline(void *(*fn)(void *), Tcb *tcb, void *arg) {
|
|
while (__atomic_load_n(&tcb->tid, __ATOMIC_RELAXED) == 0) {
|
|
mlibc::sys_futex_wait(&tcb->tid, 0, nullptr);
|
|
}
|
|
|
|
tcb->invokeThreadFunc(reinterpret_cast<void *>(fn), arg);
|
|
|
|
__atomic_store_n(&tcb->didExit, 1, __ATOMIC_RELEASE);
|
|
mlibc::sys_futex_wake(&tcb->didExit);
|
|
|
|
mlibc::sys_thread_exit();
|
|
}
|
|
|
|
#define DEFAULT_STACK 0x20000
|
|
|
|
namespace mlibc {
|
|
int sys_prepare_stack(void **stack, void *entry, void *arg, void *tcb, size_t *stack_size, size_t *guard_size, void **stack_base) {
|
|
*guard_size = mlibc::page_size;
|
|
|
|
*stack_size = *stack_size ? *stack_size : DEFAULT_STACK;
|
|
|
|
if (!*stack) {
|
|
*stack_base = mmap(NULL, *stack_size + mlibc::page_size, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
|
|
if (*stack_base == MAP_FAILED) {
|
|
return errno;
|
|
}
|
|
munmap((char *)*stack_base + *stack_size, mlibc::page_size);
|
|
} else {
|
|
*stack_base = *stack;
|
|
}
|
|
|
|
*stack = (void *)((char *)*stack_base + *stack_size);
|
|
|
|
void **stack_it = (void **)*stack;
|
|
|
|
*--stack_it = arg;
|
|
*--stack_it = tcb;
|
|
*--stack_it = entry;
|
|
|
|
*stack = (void *)stack_it;
|
|
|
|
return 0;
|
|
}
|
|
}
|