blob: 1d3bee1d9b0404494db6d2745e31ebe780ed682e [file] [log] [blame]
#include "pthread_impl.h"
#include "atomic.h"
#include "syscall.h"
/* cheat and reuse CRTJMP macro from dynlink code */
#include "dynlink.h"
static volatile int lock;
static void *unmap_base;
static size_t unmap_size;
static char shared_stack[256];
static void do_unmap()
{
__syscall(SYS_munmap, unmap_base, unmap_size);
__syscall(SYS_exit);
}
void __unmapself(void *base, size_t size)
{
int tid=__pthread_self()->tid;
char *stack = shared_stack + sizeof shared_stack;
stack -= (uintptr_t)stack % 16;
while (lock || a_cas(&lock, 0, tid))
a_spin();
__syscall(SYS_set_tid_address, &lock);
unmap_base = base;
unmap_size = size;
CRTJMP(do_unmap, stack);
}