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Date: Tue, 15 Jan 2008 13:10:53 -0800
From: Harvey Harrison <harvey.harrison@...il.com>
To: Ingo Molnar <mingo@...e.hu>, Andi Kleen <ak@...e.de>
Cc: Thomas Gleixner <tglx@...utronix.de>,
LKML <linux-kernel@...r.kernel.org>,
"H. Peter Anvin" <hpa@...or.com>
Subject: [PATCH] x86: Add dump_pagetable helper to X86_32
Similar to X86_64.
Signed-off-by: Harvey Harrison <harvey.harrison@...il.com>
---
Ingo, pulled this out of some unification work, Andi Kleen
sent a pretty much identical patch in his CPA queue (7/31), this
is against current x86.git
arch/x86/mm/fault_32.c | 72 ++++++++++++++++++++++++++----------------------
1 files changed, 39 insertions(+), 33 deletions(-)
diff --git a/arch/x86/mm/fault_32.c b/arch/x86/mm/fault_32.c
index 46ec16c..977904c 100644
--- a/arch/x86/mm/fault_32.c
+++ b/arch/x86/mm/fault_32.c
@@ -173,6 +173,44 @@ static void force_sig_info_fault(int si_signo, int si_code,
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);
static inline pmd_t *vmalloc_sync_one(pgd_t *pgd, unsigned long address)
@@ -572,7 +610,6 @@ no_context:
bust_spinlocks(1);
if (oops_may_print()) {
- __typeof__(pte_val(__pte(0))) page;
#ifdef CONFIG_X86_PAE
if (error_code & PF_INSTR) {
@@ -593,38 +630,7 @@ no_context:
printk(" at virtual address %08lx\n", address);
printk(KERN_ALERT "printing ip: %08lx ", regs->ip);
- 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");
+ dump_pagetable(address);
}
tsk->thread.cr2 = address;
--
1.5.4.rc2.1164.g6451
--
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