From bc850d6b374fffd08336996f4b4d3bbd6bf427f6 Mon Sep 17 00:00:00 2001 From: Arjan van de Ven Date: Wed, 30 Jan 2008 13:33:07 +0100 Subject: x86: add the capability to print fuzzy backtraces For enhancing the 32 bit EBP based backtracer, I need the capability for the backtracer to tell it's customer that an entry is either reliable or unreliable, and the backtrace printing code then needs to print the unreliable ones slightly different. This patch adds the basic capability, the next patch will add a user of this capability. Signed-off-by: Arjan van de Ven Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner --- arch/x86/kernel/traps_32.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) (limited to 'arch/x86/kernel/traps_32.c') diff --git a/arch/x86/kernel/traps_32.c b/arch/x86/kernel/traps_32.c index acc9af260fac..8ef8a9ddfec6 100644 --- a/arch/x86/kernel/traps_32.c +++ b/arch/x86/kernel/traps_32.c @@ -126,7 +126,7 @@ static inline unsigned long print_context_stack(struct thread_info *tinfo, addr = frame->return_address; if (__kernel_text_address(addr)) - ops->address(data, addr); + ops->address(data, addr, 1); /* * break out of recursive entries (such as * end_of_stack_stop_unwind_function). Also, @@ -145,7 +145,7 @@ static inline unsigned long print_context_stack(struct thread_info *tinfo, addr = *stack++; if (__kernel_text_address(addr)) - ops->address(data, addr); + ops->address(data, addr, 1); } #endif return bp; @@ -220,9 +220,11 @@ static int print_trace_stack(void *data, char *name) /* * Print one address/symbol entries per line. */ -static void print_trace_address(void *data, unsigned long addr) +static void print_trace_address(void *data, unsigned long addr, int reliable) { printk("%s [<%08lx>] ", (char *)data, addr); + if (!reliable) + printk("? "); print_symbol("%s\n", addr); touch_nmi_watchdog(); } -- cgit v1.2.2