linux/arch/x86_64
Heiko Carstens 608e261968 generic bug: use show_regs() instead of dump_stack()
The current generic bug implementation has a call to dump_stack() in case a
WARN_ON(whatever) gets hit.  Since report_bug(), which calls dump_stack(),
gets called from an exception handler we can do better: just pass the
pt_regs structure to report_bug() and pass it to show_regs() in case of a
warning.  This will give more debug informations like register contents,
etc...  In addition this avoids some pointless lines that dump_stack()
emits, since it includes a stack backtrace of the exception handler which
is of no interest in case of a warning.  E.g.  on s390 the following lines
are currently always present in a stack backtrace if dump_stack() gets
called from report_bug():

 [<000000000001517a>] show_trace+0x92/0xe8)
 [<0000000000015270>] show_stack+0xa0/0xd0
 [<00000000000152ce>] dump_stack+0x2e/0x3c
 [<0000000000195450>] report_bug+0x98/0xf8
 [<0000000000016cc8>] illegal_op+0x1fc/0x21c
 [<00000000000227d6>] sysc_return+0x0/0x10

Acked-by: Jeremy Fitzhardinge <jeremy@goop.org>
Acked-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Cc: Andi Kleen <ak@suse.de>
Cc: Kyle McMartin <kyle@parisc-linux.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-16 09:05:51 -07:00
..
boot Use the new x86 setup code for x86-64; unify with i386 2007-07-12 10:55:55 -07:00
crypto
ia32 diskquota: 32bit quota tools on 64bit architectures 2007-07-16 09:05:48 -07:00
kernel generic bug: use show_regs() instead of dump_stack() 2007-07-16 09:05:51 -07:00
lib Merge master.kernel.org:/pub/scm/linux/kernel/git/davej/cpufreq 2007-02-26 14:17:50 -08:00
mm Allow DEBUG_RODATA and KPROBES to co-exist 2007-06-21 16:02:50 -07:00
oprofile
pci [PATCH] mmconfig: fix unreachable_devices() 2007-02-13 13:26:20 +01:00
defconfig x86_64: Update defconfig 2007-05-21 09:56:56 -07:00
Kconfig x86-64: add CONFIG_PHYSICAL_ALIGN for consistency with i386 2007-07-12 10:55:54 -07:00
Kconfig.debug Allow DEBUG_RODATA and KPROBES to co-exist 2007-06-21 16:02:50 -07:00
Makefile [PATCH] x86-64: Remove CONFIG_REORDER 2007-05-02 19:27:21 +02:00