/*! This function will change the protection of all read-only segments to really
be read-only (and executable).
The areas have to be read/write first, so that they can be relocated.
If at least one image is in compatibility mode then we allow execution of
all areas.
*/
void
remap_images()
{
for (image_t* image = sLoadedImages.head; image != NULL;
image = image->next) {
for (uint32 i = 0; i < image->num_regions; i++) {
// we only need to do this once, so we remember those we've already
// mapped
if ((image->regions[i].flags & RFLAG_REMAPPED) != 0)
continue;
status_t result = B_OK;
if ((image->regions[i].flags & RFLAG_RW) == 0) {
result = _kern_set_area_protection(image->regions[i].id,
B_READ_AREA | B_EXECUTE_AREA);
} else if (image->abi < B_HAIKU_ABI_GCC_2_HAIKU) {
result = _kern_set_area_protection(image->regions[i].id,
B_READ_AREA | B_WRITE_AREA | B_EXECUTE_AREA);
}
if (result == B_OK)
image->regions[i].flags |= RFLAG_REMAPPED;
}
}
}
void
__set_stack_protection(void)
{
if (__gABIVersion < B_HAIKU_ABI_GCC_2_HAIKU) {
area_info info;
ssize_t cookie = 0;
while (get_next_area_info(B_CURRENT_TEAM, &cookie, &info) == B_OK) {
if ((info.protection & B_STACK_AREA) != 0) {
_kern_set_area_protection(info.area,
B_READ_AREA | B_WRITE_AREA | B_EXECUTE_AREA | B_STACK_AREA);
}
}
}
}
/*! This function will change the protection of all read-only segments to really
be read-only.
The areas have to be read/write first, so that they can be relocated.
*/
void
remap_images()
{
for (image_t* image = sLoadedImages.head; image != NULL;
image = image->next) {
for (uint32 i = 0; i < image->num_regions; i++) {
if ((image->regions[i].flags & RFLAG_RW) == 0
&& (image->regions[i].flags & RFLAG_REMAPPED) == 0) {
// we only need to do this once, so we remember those we've already mapped
if (_kern_set_area_protection(image->regions[i].id,
B_READ_AREA | B_EXECUTE_AREA) == B_OK) {
image->regions[i].flags |= RFLAG_REMAPPED;
}
}
}
}
}
status_t
set_area_protection(area_id id, uint32 protection)
{
return _kern_set_area_protection(id, protection);
}
