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Merge branch 'linus' into stackprotector

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Conflicts:
	arch/x86/kernel/Makefile
	include/asm-x86/pda.h
This commit is contained in:
Ingo Molnar
2008-10-15 13:46:29 +02:00
parent 4f962d4d65 278429cff8
commit b2aaf8f74c
15391 changed files with 1154074 additions and 777808 deletions
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124
arch/x86/mm/fault.c
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@@ -10,6 +10,7 @@
#include <linux/string.h>
#include <linux/types.h>
#include <linux/ptrace.h>
#include <linux/mmiotrace.h>
#include <linux/mman.h>
#include <linux/mm.h>
#include <linux/smp.h>
@@ -35,6 +36,7 @@
#include <asm/tlbflush.h>
#include <asm/proto.h>
#include <asm-generic/sections.h>
#include <asm/traps.h>
/*
* Page fault error code bits
@@ -50,17 +52,23 @@
#define PF_RSVD (1<<3)
#define PF_INSTR (1<<4)
static inline int kmmio_fault(struct pt_regs *regs, unsigned long addr)
{
#ifdef CONFIG_MMIOTRACE_HOOKS
if (unlikely(is_kmmio_active()))
if (kmmio_handler(regs, addr) == 1)
return -1;
#endif
return 0;
}
static inline int notify_page_fault(struct pt_regs *regs)
{
#ifdef CONFIG_KPROBES
int ret = 0;
/* kprobe_running() needs smp_processor_id() */
#ifdef CONFIG_X86_32
if (!user_mode_vm(regs)) {
#else
if (!user_mode(regs)) {
#endif
preempt_disable();
if (kprobe_running() && kprobe_fault_handler(regs, 14))
ret = 1;
@@ -351,8 +359,6 @@ static int is_errata100(struct pt_regs *regs, unsigned long address)
return 0;
}
void do_invalid_op(struct pt_regs *, unsigned long);
static int is_f00f_bug(struct pt_regs *regs, unsigned long address)
{
#ifdef CONFIG_X86_F00F_BUG
@@ -397,11 +403,7 @@ static void show_fault_oops(struct pt_regs *regs, unsigned long error_code,
printk(KERN_CONT "NULL pointer dereference");
else
printk(KERN_CONT "paging request");
#ifdef CONFIG_X86_32
printk(KERN_CONT " at %08lx\n", address);
#else
printk(KERN_CONT " at %016lx\n", address);
#endif
printk(KERN_CONT " at %p\n", (void *) address);
printk(KERN_ALERT "IP:");
printk_address(regs->ip, 1);
dump_pagetable(address);
@@ -593,11 +595,6 @@ void __kprobes do_page_fault(struct pt_regs *regs, unsigned long error_code)
unsigned long flags;
#endif
/*
* We can fault from pretty much anywhere, with unknown IRQ state.
*/
trace_hardirqs_fixup();
tsk = current;
mm = tsk->mm;
prefetchw(&mm->mmap_sem);
@@ -609,6 +606,8 @@ void __kprobes do_page_fault(struct pt_regs *regs, unsigned long error_code)
if (notify_page_fault(regs))
return;
if (unlikely(kmmio_fault(regs, address)))
return;
/*
* We fault-in kernel-space virtual memory on-demand. The
@@ -803,14 +802,10 @@ bad_area_nosemaphore:
if (show_unhandled_signals && unhandled_signal(tsk, SIGSEGV) &&
printk_ratelimit()) {
printk(
#ifdef CONFIG_X86_32
"%s%s[%d]: segfault at %lx ip %08lx sp %08lx error %lx",
#else
"%s%s[%d]: segfault at %lx ip %lx sp %lx error %lx",
#endif
"%s%s[%d]: segfault at %lx ip %p sp %p error %lx",
task_pid_nr(tsk) > 1 ? KERN_INFO : KERN_EMERG,
tsk->comm, task_pid_nr(tsk), address, regs->ip,
regs->sp, error_code);
tsk->comm, task_pid_nr(tsk), address,
(void *) regs->ip, (void *) regs->sp, error_code);
print_vma_addr(" in ", regs->ip);
printk("\n");
}
@@ -921,72 +916,45 @@ LIST_HEAD(pgd_list);
void vmalloc_sync_all(void)
{
#ifdef CONFIG_X86_32
/*
* Note that races in the updates of insync and start aren't
* problematic: insync can only get set bits added, and updates to
* start are only improving performance (without affecting correctness
* if undone).
*/
static DECLARE_BITMAP(insync, PTRS_PER_PGD);
static unsigned long start = TASK_SIZE;
unsigned long address;
#ifdef CONFIG_X86_32
if (SHARED_KERNEL_PMD)
return;
BUILD_BUG_ON(TASK_SIZE & ~PGDIR_MASK);
for (address = start; address >= TASK_SIZE; address += PGDIR_SIZE) {
if (!test_bit(pgd_index(address), insync)) {
unsigned long flags;
struct page *page;
for (address = VMALLOC_START & PMD_MASK;
address >= TASK_SIZE && address < FIXADDR_TOP;
address += PMD_SIZE) {
unsigned long flags;
struct page *page;
spin_lock_irqsave(&pgd_lock, flags);
list_for_each_entry(page, &pgd_list, lru) {
if (!vmalloc_sync_one(page_address(page),
address))
break;
}
spin_unlock_irqrestore(&pgd_lock, flags);
if (!page)
set_bit(pgd_index(address), insync);
spin_lock_irqsave(&pgd_lock, flags);
list_for_each_entry(page, &pgd_list, lru) {
if (!vmalloc_sync_one(page_address(page),
address))
break;
}
if (address == start && test_bit(pgd_index(address), insync))
start = address + PGDIR_SIZE;
spin_unlock_irqrestore(&pgd_lock, flags);
}
#else /* CONFIG_X86_64 */
/*
* Note that races in the updates of insync and start aren't
* problematic: insync can only get set bits added, and updates to
* start are only improving performance (without affecting correctness
* if undone).
*/
static DECLARE_BITMAP(insync, PTRS_PER_PGD);
static unsigned long start = VMALLOC_START & PGDIR_MASK;
unsigned long address;
for (address = VMALLOC_START & PGDIR_MASK; address <= VMALLOC_END;
address += PGDIR_SIZE) {
const pgd_t *pgd_ref = pgd_offset_k(address);
unsigned long flags;
struct page *page;
for (address = start; address <= VMALLOC_END; address += PGDIR_SIZE) {
if (!test_bit(pgd_index(address), insync)) {
const pgd_t *pgd_ref = pgd_offset_k(address);
unsigned long flags;
struct page *page;
if (pgd_none(*pgd_ref))
continue;
spin_lock_irqsave(&pgd_lock, flags);
list_for_each_entry(page, &pgd_list, lru) {
pgd_t *pgd;
pgd = (pgd_t *)page_address(page) + pgd_index(address);
if (pgd_none(*pgd))
set_pgd(pgd, *pgd_ref);
else
BUG_ON(pgd_page_vaddr(*pgd) != pgd_page_vaddr(*pgd_ref));
}
spin_unlock_irqrestore(&pgd_lock, flags);
set_bit(pgd_index(address), insync);
if (pgd_none(*pgd_ref))
continue;
spin_lock_irqsave(&pgd_lock, flags);
list_for_each_entry(page, &pgd_list, lru) {
pgd_t *pgd;
pgd = (pgd_t *)page_address(page) + pgd_index(address);
if (pgd_none(*pgd))
set_pgd(pgd, *pgd_ref);
else
BUG_ON(pgd_page_vaddr(*pgd) != pgd_page_vaddr(*pgd_ref));
}
if (address == start)
start = address + PGDIR_SIZE;
spin_unlock_irqrestore(&pgd_lock, flags);
}
#endif
}