[wasi-libc.git] / libc-top-half / musl / src / thread / __unmapself.c

#include "pthread_impl.h"
#include "atomic.h"
#include "syscall.h"
/* cheat and reuse CRTJMP macro from dynlink code */
#include "dynlink.h"

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)
{
	char *stack = shared_stack + sizeof shared_stack;
	stack -= (uintptr_t)stack % 16;
	unmap_base = base;
	unmap_size = size;
	CRTJMP(do_unmap, stack);
}
Commit	Line	Data
320054e8 DG	1	#include "pthread_impl.h"
	2	#include "atomic.h"
	3	#include "syscall.h"
	4	/* cheat and reuse CRTJMP macro from dynlink code */
	5	#include "dynlink.h"
	6
320054e8 DG	7	static void *unmap_base;
	8	static size_t unmap_size;
	9	static char shared_stack[256];
	10
	11	static void do_unmap()
	12	{
	13	__syscall(SYS_munmap, unmap_base, unmap_size);
	14	__syscall(SYS_exit);
	15	}
	16
	17	void __unmapself(void *base, size_t size)
	18	{
320054e8 DG	19	char *stack = shared_stack + sizeof shared_stack;
320054e8 DG	20	stack -= (uintptr_t)stack % 16;
320054e8 DG	21	unmap_base = base;
	22	unmap_size = size;
	23	CRTJMP(do_unmap, stack);
	24	}