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x86: add dump_pagetable helper to X86_32

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Similar to x86 64-bit.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Harvey Harrison 2008-01-30 13:33:42 +01:00 committed by Ingo Molnar
parent 0c42f39276
commit e66a95127d
1 changed files with 39 additions and 33 deletions
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72
arch/x86/mm/fault_32.c
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@ -173,6 +173,44 @@ static void force_sig_info_fault(int si_signo, int si_code,
force_sig_info(si_signo, &info, tsk); force_sig_info(si_signo, &info, tsk);
} }
void dump_pagetable(unsigned long address)
{
__typeof__(pte_val(__pte(0))) page;
page = read_cr3();
page = ((__typeof__(page) *) __va(page))[address >> PGDIR_SHIFT];
#ifdef CONFIG_X86_PAE
printk("*pdpt = %016Lx ", page);
if ((page >> PAGE_SHIFT) < max_low_pfn
&& page & _PAGE_PRESENT) {
page &= PAGE_MASK;
page = ((__typeof__(page) *) __va(page))[(address >> PMD_SHIFT)
& (PTRS_PER_PMD - 1)];
printk(KERN_CONT "*pde = %016Lx ", page);
page &= ~_PAGE_NX;
}
#else
printk("*pde = %08lx ", page);
#endif
/*
* We must not directly access the pte in the highpte
* case if the page table is located in highmem.
* And let's rather not kmap-atomic the pte, just in case
* it's allocated already.
*/
if ((page >> PAGE_SHIFT) < max_low_pfn
&& (page & _PAGE_PRESENT)
&& !(page & _PAGE_PSE)) {
page &= PAGE_MASK;
page = ((__typeof__(page) *) __va(page))[(address >> PAGE_SHIFT)
& (PTRS_PER_PTE - 1)];
printk("*pte = %0*Lx ", sizeof(page)*2, (u64)page);
}
printk("\n");
}
void do_invalid_op(struct pt_regs *, unsigned long); void do_invalid_op(struct pt_regs *, unsigned long);
static inline pmd_t *vmalloc_sync_one(pgd_t *pgd, unsigned long address) static inline pmd_t *vmalloc_sync_one(pgd_t *pgd, unsigned long address)
@ -572,7 +610,6 @@ no_context:
bust_spinlocks(1); bust_spinlocks(1);
if (oops_may_print()) { if (oops_may_print()) {
__typeof__(pte_val(__pte(0))) page;
#ifdef CONFIG_X86_PAE #ifdef CONFIG_X86_PAE
if (error_code & PF_INSTR) { if (error_code & PF_INSTR) {
@ -593,38 +630,7 @@ no_context:
printk(" at virtual address %08lx\n", address); printk(" at virtual address %08lx\n", address);
printk(KERN_ALERT "printing ip: %08lx ", regs->ip); printk(KERN_ALERT "printing ip: %08lx ", regs->ip);
page = read_cr3(); dump_pagetable(address);
page = ((__typeof__(page) *) __va(page))[address >> PGDIR_SHIFT];
#ifdef CONFIG_X86_PAE
printk("*pdpt = %016Lx ", page);
if ((page >> PAGE_SHIFT) < max_low_pfn
&& page & _PAGE_PRESENT) {
page &= PAGE_MASK;
page = ((__typeof__(page) *) __va(page))[(address >> PMD_SHIFT)
& (PTRS_PER_PMD - 1)];
printk(KERN_CONT "*pde = %016Lx ", page);
page &= ~_PAGE_NX;
}
#else
printk("*pde = %08lx ", page);
#endif
/*
* We must not directly access the pte in the highpte
* case if the page table is located in highmem.
* And let's rather not kmap-atomic the pte, just in case
* it's allocated already.
*/
if ((page >> PAGE_SHIFT) < max_low_pfn
&& (page & _PAGE_PRESENT)
&& !(page & _PAGE_PSE)) {
page &= PAGE_MASK;
page = ((__typeof__(page) *) __va(page))[(address >> PAGE_SHIFT)
& (PTRS_PER_PTE - 1)];
printk("*pte = %0*Lx ", sizeof(page)*2, (u64)page);
}
printk("\n");
} }
tsk->thread.cr2 = address; tsk->thread.cr2 = address;