From ef41b5c924984b34d9c2830185295b2a9ae78e13 Mon Sep 17 00:00:00 2001 From: Russell King Date: Sun, 20 Oct 2013 15:34:10 +0100 Subject: ARM: make kernel oops easier to read We don't need the offset for the first function name in each backtrace entry; this needlessly consumes screen space. This is virtually always the first or second instruction in the called function. Also, recognise stmfd instructions which include r10 as a valid stack saving instruction, and when dumping the registers, dump six registers per line rather than five, and fix the wrapping. Signed-off-by: Russell King --- arch/arm/kernel/traps.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/arm/kernel/traps.c') diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c index 7940241f0576..a55a14267870 100644 --- a/arch/arm/kernel/traps.c +++ b/arch/arm/kernel/traps.c @@ -56,7 +56,7 @@ static void dump_mem(const char *, const char *, unsigned long, unsigned long); void dump_backtrace_entry(unsigned long where, unsigned long from, unsigned long frame) { #ifdef CONFIG_KALLSYMS - printk("[<%08lx>] (%pS) from [<%08lx>] (%pS)\n", where, (void *)where, from, (void *)from); + printk("[<%08lx>] (%ps) from [<%08lx>] (%pS)\n", where, (void *)where, from, (void *)from); #else printk("Function entered at [<%08lx>] from [<%08lx>]\n", where, from); #endif -- cgit v1.2.3 From 29c350bf28da333e41e30497b649fe335712a2ab Mon Sep 17 00:00:00 2001 From: Russell King Date: Fri, 3 Jan 2014 15:01:39 +0000 Subject: ARM: fix "bad mode in ... handler" message for undefined instructions The array was missing the final entry for the undefined instruction exception handler; this commit adds it. Cc: Signed-off-by: Russell King --- arch/arm/kernel/traps.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) (limited to 'arch/arm/kernel/traps.c') diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c index 7940241f0576..6eda3bf85c52 100644 --- a/arch/arm/kernel/traps.c +++ b/arch/arm/kernel/traps.c @@ -36,7 +36,13 @@ #include #include -static const char *handler[]= { "prefetch abort", "data abort", "address exception", "interrupt" }; +static const char *handler[]= { + "prefetch abort", + "data abort", + "address exception", + "interrupt", + "undefined instruction", +}; void *vectors_page; -- cgit v1.2.3 From d6cd989477e2fee29ccda257614ef7b2621d0601 Mon Sep 17 00:00:00 2001 From: Taras Kondratiuk Date: Fri, 10 Jan 2014 01:36:00 +0100 Subject: ARM: 7939/1: traps: fix opcode endianness when read from user memory Currently code has an inverted logic: opcode from user memory is swapped to a proper endianness only in case of read error. While normally opcode should be swapped only if it was read correctly from user memory. Reviewed-by: Victor Kamensky Signed-off-by: Ben Dooks Signed-off-by: Taras Kondratiuk Signed-off-by: Russell King --- arch/arm/kernel/traps.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'arch/arm/kernel/traps.c') diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c index 6eda3bf85c52..4636d56af2db 100644 --- a/arch/arm/kernel/traps.c +++ b/arch/arm/kernel/traps.c @@ -431,9 +431,10 @@ asmlinkage void __exception do_undefinstr(struct pt_regs *regs) instr2 = __mem_to_opcode_thumb16(instr2); instr = __opcode_thumb32_compose(instr, instr2); } - } else if (get_user(instr, (u32 __user *)pc)) { + } else { + if (get_user(instr, (u32 __user *)pc)) + goto die_sig; instr = __mem_to_opcode_arm(instr); - goto die_sig; } if (call_undef_hook(regs, instr) == 0) -- cgit v1.2.3