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lguest: map switcher with executable page table entries 

Map switcher with executable page table entries.
(This bug didn't matter before PAE and hence NX support -- RR)

Signed-off-by: Matias Zabaljauregui <zabaljauregui@gmail.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Matias Zabaljauregui 2009-05-30 15:35:49 -03:00 committed by Rusty Russell
parent 7b5c806c35
commit ed1dc77810
2 changed files with 2 additions and 2 deletions
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2
drivers/lguest/core.c
View File

@ -95,7 +95,7 @@ static __init int map_switcher(void)
* array of struct pages. It increments that pointer, but we don't * array of struct pages. It increments that pointer, but we don't
* care. */ * care. */
pagep = switcher_page; pagep = switcher_page;
err = map_vm_area(switcher_vma, PAGE_KERNEL, &pagep); err = map_vm_area(switcher_vma, PAGE_KERNEL_EXEC, &pagep);
if (err) { if (err) {
printk("lguest: map_vm_area failed: %i\n", err); printk("lguest: map_vm_area failed: %i\n", err);
goto free_vma; goto free_vma;

2
drivers/lguest/page_tables.c
View File

@ -714,7 +714,7 @@ void map_switcher_in_guest(struct lg_cpu *cpu, struct lguest_pages *pages)
/* Make the last PGD entry for this Guest point to the Switcher's PTE /* Make the last PGD entry for this Guest point to the Switcher's PTE
* page for this CPU (with appropriate flags). */ * page for this CPU (with appropriate flags). */
switcher_pgd = __pgd(__pa(switcher_pte_page) | __PAGE_KERNEL); switcher_pgd = __pgd(__pa(switcher_pte_page) | __PAGE_KERNEL_EXEC);
cpu->lg->pgdirs[cpu->cpu_pgd].pgdir[SWITCHER_PGD_INDEX] = switcher_pgd; cpu->lg->pgdirs[cpu->cpu_pgd].pgdir[SWITCHER_PGD_INDEX] = switcher_pgd;