Function sunrise_kernel::syscalls::set_process_memory_permission

pub fn set_process_memory_permission(
    proc_hnd: u32, 
    addr: usize, 
    size: usize, 
    perms: u32
) -> Result<(), UserspaceError>

Change permission of a page-aligned memory region. Acceptable permissions are ---, r-- and rw-. In other words, it is not allowed to set the executable bit, nor is it acceptable to use write-only permissions.

This can only be used on memory regions with the process_permission_change_allowed state.

Errors

• InvalidAddress
  • Supplied address is not page-aligned.
• InvalidSize
  • Supplied size is zero or not page-aligned.
• InvalidMemState
  • Supplied memory range is not contained within the target process address space.
  • Supplied memory range does not have the process_permission_change_allowed state.