Ticket #6163: 0001-ppc-Implement-arch_vm_translation_map_is_kernel_page.patch

File 0001-ppc-Implement-arch_vm_translation_map_is_kernel_page.patch, 1.2 KB (added by andreasf, 14 years ago)

proposed patch

  • src/system/kernel/arch/ppc/arch_vm_translation_map.cpp 

    From dbff3d0a7217cd124141607b46a08325c3c916c2 Mon Sep 17 00:00:00 2001
From: Andreas Faerber <andreas.faerber@web.de>
Date: Sat, 12 Jun 2010 22:45:41 +0200
Subject: [PATCH] ppc: Implement arch_vm_translation_map_is_kernel_page_accessible

---
 .../kernel/arch/ppc/arch_vm_translation_map.cpp    |   14 ++++++++++++--
 1 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/src/system/kernel/arch/ppc/arch_vm_translation_map.cpp b/src/system/kernel/arch/ppc/arch_vm_translation_map.cpp
index 7b42772..8cc25d9 100644
    a b bool  
    927927arch_vm_translation_map_is_kernel_page_accessible(addr_t virtualAddress,
    928928    uint32 protection)
    929929{
    930     // TODO: Implement!
    931     return false;
     930    VMAddressSpace *addressSpace = VMAddressSpace::Kernel();
     931
     932    PPCVMTranslationMap* map = static_cast<PPCVMTranslationMap*>(
     933        addressSpace->TranslationMap());
     934    phys_addr_t physicalAddress;
     935    uint32 flags;
     936    if (map->Query(virtualAddress, &physicalAddress, &flags) != B_OK)
     937        return false;
     938    if ((flags & PAGE_PRESENT) == 0)
     939        return false;
     940    return (protection & B_KERNEL_WRITE_AREA) == 0
     941        || (flags & B_KERNEL_WRITE_AREA) != 0;
    932942}