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print more info on page faults

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This commit is contained in:
Balazs Gerofi
2012-05-19 16:52:28 +09:00
parent 9f1d1c712d
commit c8d6ec9356
1 changed files with 21 additions and 5 deletions
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26
kernel/mem.c
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@ -6,12 +6,15 @@
#include <aal/lock.h>
#include <aal/mm.h>
#include <aal/page_alloc.h>
#include <registers.h>
#include <cls.h>
static struct aal_page_allocator_desc *pa_allocator;
static unsigned long pa_start, pa_end;
extern int aal_mc_pt_print_pte(struct page_table *pt, void *virt);
static void reserve_pages(unsigned long start, unsigned long end, int type)
{
if (start < pa_start) {
@ -43,15 +46,24 @@ static struct aal_mc_pa_ops allocator = {
.free_page = free_pages,
};
static void page_fault_handler(unsigned long address, void *regs)
static void page_fault_handler(unsigned long address, void *regs,
unsigned long rbp)
{
struct vm_range *range, *next;
char found = 0;
int irqflags;
unsigned long error = ((struct x86_regs *)regs)->error;
irqflags = kprintf_lock();
__kprintf("[%d] Page fault for 0x%lX\n",
aal_mc_get_processor_id(), address);
__kprintf("[%d] Page fault for 0x%lX, (rbp: 0x%lX)\n",
aal_mc_get_processor_id(), address, rbp);
__kprintf("%s for %s access in %s mode (reserved bit %s set), it %s an instruction fetch\n",
(error & PF_PROT ? "protection fault" : "no page found"),
(error & PF_WRITE ? "write" : "read"),
(error & PF_USER ? "user" : "kernel"),
(error & PF_RSVD ? "was" : "wasn't"),
(error & PF_INSTR ? "was" : "wasn't"));
list_for_each_entry_safe(range, next,
&cpu_local_var(current)->vm->vm_range_list,
@ -60,6 +72,8 @@ static void page_fault_handler(unsigned long address, void *regs)
if (range->start <= address && range->end > address) {
__kprintf("address is in range, flag: 0x%X! \n", range->flag);
found = 1;
aal_mc_pt_print_pte(cpu_local_var(current)->vm->page_table,
(void*)address);
break;
}
}
@ -142,7 +156,7 @@ void *aal_mc_map_virtual(unsigned long phys, int npages,
return (char *)p + offset;
}
void aal_mc_unmap_virtual(void *va, int npages)
void aal_mc_unmap_virtual(void *va, int npages, int free_physical)
{
unsigned long i;
@ -150,7 +164,9 @@ void aal_mc_unmap_virtual(void *va, int npages)
for (i = 0; i < npages; i++) {
aal_mc_pt_clear_page(NULL, (char *)va + (i << PAGE_SHIFT));
}
aal_pagealloc_free(vmap_allocator, virt_to_phys(va), npages);
if (free_physical)
aal_pagealloc_free(vmap_allocator, virt_to_phys(va), npages);
}
void mem_init(void)