github.com/afumu/libc@v0.0.6/musl/src/mman/mprotect.c (about)

     1  #include <sys/mman.h>
     2  #include "libc.h"
     3  #include "syscall.h"
     4  
     5  int __mprotect(void *addr, size_t len, int prot)
     6  {
     7  	size_t start, end;
     8  	start = (size_t)addr & -PAGE_SIZE;
     9  	end = (size_t)((char *)addr + len + PAGE_SIZE-1) & -PAGE_SIZE;
    10  	return syscall(SYS_mprotect, start, end-start, prot);
    11  }
    12  
    13  weak_alias(__mprotect, mprotect);