fusl/src/mman/mprotect.c

#include <sys/mman.h>
#include "libc.h"
#include "syscall.h"

int __mprotect(void* addr, size_t len, int prot) {
  size_t start, end;
  start = (size_t)addr & -PAGE_SIZE;
  end = (size_t)((char*)addr + len + PAGE_SIZE - 1) & -PAGE_SIZE;
  return syscall(SYS_mprotect, start, end - start, prot);
}

weak_alias(__mprotect, mprotect);