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Diffstat (limited to 'arch/cris/mm/fault.c')
-rw-r--r--arch/cris/mm/fault.c45
1 files changed, 29 insertions, 16 deletions
diff --git a/arch/cris/mm/fault.c b/arch/cris/mm/fault.c
index 380df1a73a6e..9dcac8ec8fa0 100644
--- a/arch/cris/mm/fault.c
+++ b/arch/cris/mm/fault.c
@@ -1,19 +1,18 @@
/*
- * linux/arch/cris/mm/fault.c
- *
- * Copyright (C) 2000-2006 Axis Communications AB
- *
- * Authors: Bjorn Wesen
+ * arch/cris/mm/fault.c
*
+ * Copyright (C) 2000-2010 Axis Communications AB
*/
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/module.h>
+#include <linux/wait.h>
#include <asm/uaccess.h>
extern int find_fixup_code(struct pt_regs *);
extern void die_if_kernel(const char *, struct pt_regs *, long);
+extern void show_registers(struct pt_regs *regs);
/* debug of low-level TLB reload */
#undef DEBUG
@@ -108,11 +107,11 @@ do_page_fault(unsigned long address, struct pt_regs *regs,
info.si_code = SEGV_MAPERR;
/*
- * If we're in an interrupt or have no user
- * context, we must not take the fault..
+ * If we're in an interrupt or "atomic" operation or have no
+ * user context, we must not take the fault.
*/
- if (in_interrupt() || !mm)
+ if (in_atomic() || !mm)
goto no_context;
down_read(&mm->mmap_sem);
@@ -193,14 +192,25 @@ do_page_fault(unsigned long address, struct pt_regs *regs,
/* User mode accesses just cause a SIGSEGV */
if (user_mode(regs)) {
+ printk(KERN_NOTICE "%s (pid %d) segfaults for page "
+ "address %08lx at pc %08lx\n",
+ tsk->comm, tsk->pid,
+ address, instruction_pointer(regs));
+
+ /* With DPG on, we've already dumped registers above. */
+ DPG(if (0))
+ show_registers(regs);
+
+#ifdef CONFIG_NO_SEGFAULT_TERMINATION
+ DECLARE_WAIT_QUEUE_HEAD(wq);
+ wait_event_interruptible(wq, 0 == 1);
+#else
info.si_signo = SIGSEGV;
info.si_errno = 0;
/* info.si_code has been set above */
info.si_addr = (void *)address;
force_sig_info(SIGSEGV, &info, tsk);
- printk(KERN_NOTICE "%s (pid %d) segfaults for page "
- "address %08lx at pc %08lx\n",
- tsk->comm, tsk->pid, address, instruction_pointer(regs));
+#endif
return;
}
@@ -245,10 +255,10 @@ do_page_fault(unsigned long address, struct pt_regs *regs,
out_of_memory:
up_read(&mm->mmap_sem);
- printk("VM: killing process %s\n", tsk->comm);
- if (user_mode(regs))
- do_exit(SIGKILL);
- goto no_context;
+ if (!user_mode(regs))
+ goto no_context;
+ pagefault_out_of_memory();
+ return;
do_sigbus:
up_read(&mm->mmap_sem);
@@ -334,8 +344,11 @@ int
find_fixup_code(struct pt_regs *regs)
{
const struct exception_table_entry *fixup;
+ /* in case of delay slot fault (v32) */
+ unsigned long ip = (instruction_pointer(regs) & ~0x1);
- if ((fixup = search_exception_tables(instruction_pointer(regs))) != 0) {
+ fixup = search_exception_tables(ip);
+ if (fixup != 0) {
/* Adjust the instruction pointer in the stackframe. */
instruction_pointer(regs) = fixup->fixup;
arch_fixup(regs);