Aren/haiku
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

bootloader: ARM: Fix mmu_free()

Browse Source 
Allocation size was mixed up with page counts...
Allow freeing up to sNextVirtualAddress.
This commit is contained in:
François Revol 2013-10-26 19:15:30 +02:00
parent 9703c9cc30
commit 18041782fd
1 changed files with 5 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
src/system/boot/arch/arm/arch_mmu.cpp
View File

@ -513,18 +513,18 @@ mmu_free(void *virtualAddress, size_t size)
TRACE(("mmu_free(virtualAddress = %p, size: %ld)\n", virtualAddress, size));
addr_t address = (addr_t)virtualAddress;
size = (size + B_PAGE_SIZE - 1) / B_PAGE_SIZE;
// get number of pages to map
addr_t pageOffset = address % B_PAGE_SIZE;
address -= pageOffset;
size = (size + pageOffset + B_PAGE_SIZE - 1) / B_PAGE_SIZE * B_PAGE_SIZE;
// is the address within the valid range?
if (address < KERNEL_BASE
|| address + size >= KERNEL_BASE + kMaxKernelSize) {
if (address < KERNEL_LOAD_BASE || address + size > sNextVirtualAddress) {
panic("mmu_free: asked to unmap out of range region (%p, size %lx)\n",
(void *)address, size);
}
// unmap all pages within the range
for (uint32 i = 0; i < size; i++) {
for (size_t i = 0; i < size; i += B_PAGE_SIZE) {
unmap_page(address);
address += B_PAGE_SIZE;
}