linux.git/arch/sh/kernel/traps.c, branch v2.6.32 Linux kernel source tree sh: nmi_debug support. 2009-09-01T08:38:32+00:00 Paul Mundt lethal@linux-sh.org 2009-09-01T08:38:32+00:00 1e1030dccb1084c8a38976d3656aab1d50d762da This implements support for NMI debugging that was shamelessly copied from the avr32 port. A bit of special magic is needed in the interrupt exception path given that the NMI exception handler is stubbed in to the regular exception handling table despite being reported in INTEVT. So we mangle the lookup and kick off an EXPEVT-style exception dispatch from the INTEVT path for exceptions that do_IRQ() has no chance of handling. As a result, we also drop the evt2irq() conversion from the do_IRQ() path and just do it in assembly. Signed-off-by: Paul Mundt <lethal@linux-sh.org> 
This implements support for NMI debugging that was shamelessly copied
from the avr32 port. A bit of special magic is needed in the interrupt
exception path given that the NMI exception handler is stubbed in to the
regular exception handling table despite being reported in INTEVT. So we
mangle the lookup and kick off an EXPEVT-style exception dispatch from
the INTEVT path for exceptions that do_IRQ() has no chance of handling.
As a result, we also drop the evt2irq() conversion from the do_IRQ() path
and just do it in assembly.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
sh: unwinder: Use a special bug flag for unwinder traps. 2009-08-21T20:28:25+00:00 Paul Mundt lethal@linux-sh.org 2009-08-21T20:28:25+00:00 e115f2c17cbceee93b34d787a7a4a867fc73e7b4 This simplifies the unwinder trap handling, dropping the use of the special trapa vector and simply piggybacking on top of the BUG support. A new BUGFLAG_UNWINDER is added for flagging the unwinder fault, before continuing on with regular BUG dispatch. Signed-off-by: Paul Mundt <lethal@linux-sh.org> 
This simplifies the unwinder trap handling, dropping the use of the
special trapa vector and simply piggybacking on top of the BUG support. A
new BUGFLAG_UNWINDER is added for flagging the unwinder fault, before
continuing on with regular BUG dispatch.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
sh: unwinder: Introduce UNWINDER_BUG() and UNWINDER_BUG_ON() 2009-08-21T12:02:44+00:00 Matt Fleming matt@console-pimps.org 2009-08-16T20:54:48+00:00 b344e24a8e8ceda83d1285d22e3e5baf4f5e42d3 We can't assume that if we execute the unwinder code and the unwinder was already running that it has faulted. Clearly two kernel threads can invoke the unwinder at the same time and may be running simultaneously. The previous approach used BUG() and BUG_ON() in the unwinder code to detect whether the unwinder was incapable of unwinding the stack, and that the next available unwinder should be used instead. A better approach is to explicitly invoke a trap handler to switch unwinders when the current unwinder cannot continue. Signed-off-by: Matt Fleming <matt@console-pimps.org> 
We can't assume that if we execute the unwinder code and the unwinder
was already running that it has faulted. Clearly two kernel threads can
invoke the unwinder at the same time and may be running simultaneously.

The previous approach used BUG() and BUG_ON() in the unwinder code to
detect whether the unwinder was incapable of unwinding the stack, and
that the next available unwinder should be used instead. A better
approach is to explicitly invoke a trap handler to switch unwinders when
the current unwinder cannot continue.

Signed-off-by: Matt Fleming <matt@console-pimps.org>
sh: unbreak WARN_ON() 2009-06-17T06:39:52+00:00 Magnus Damm damm@igel.co.jp 2009-06-17T04:48:20+00:00 0ec39885b237c35109644f5d8232228026a72715 Fix WARN_ON() by modifying the bug trap handling code to always return in the in-kernel instruction pointer case. Signed-off-by: Magnus Damm <damm@igel.co.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org> 
Fix WARN_ON() by modifying the bug trap handling code to
always return in the in-kernel instruction pointer case.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
sh: Rename opcode_t to insn_size_t. 2009-05-09T07:02:08+00:00 Paul Mundt lethal@linux-sh.org 2009-05-09T07:02:08+00:00 2bcfffa42309b6f73042c62459bf5207762a271d This is now clashing with a driver, so just rename it. Signed-off-by: Paul Mundt <lethal@linux-sh.org> 
This is now clashing with a driver, so just rename it.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
sh: Make is_valid_bugaddr() more intelligent on nommu. 2008-05-19T10:32:07+00:00 Paul Mundt lethal@linux-sh.org 2008-05-19T10:32:07+00:00 9a33fc217d2248838d52f8ef214b1909073f3eb4 Currently is_valid_bugaddr() is true for anything >= PAGE_OFFSET, which happens to be 0 on nommu configurations. Make this a bit smarter by just reading in the opcode and comparing it against the trap type that we already know. Follows the logic from avr32. Signed-off-by: Paul Mundt <lethal@linux-sh.org> 
Currently is_valid_bugaddr() is true for anything >= PAGE_OFFSET, which
happens to be 0 on nommu configurations. Make this a bit smarter by just
reading in the opcode and comparing it against the trap type that we
already know. Follows the logic from avr32.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
sh: Fix the arch/sh/kernel/traps.c build for sh32. 2008-01-28T04:18:57+00:00 Paul Mundt lethal@linux-sh.org 2007-11-26T09:17:51+00:00 47a3eb95560ea525a2dfbee1c4e7f03a45fd2207 Signed-off-by: Paul Mundt <lethal@linux-sh.org> 
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
sh: Share bug/debug traps across _32 and _64. 2008-01-28T04:18:50+00:00 Paul Mundt lethal@linux-sh.org 2007-11-20T09:08:06+00:00 5a4f7c66be981c6b5f44a4d66a14ea6ac9b7b6b0 Signed-off-by: Paul Mundt <lethal@linux-sh.org> 
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
sh: Move in the SH-5 traps.c impl. 2008-01-28T04:18:43+00:00 Paul Mundt lethal@linux-sh.org 2007-11-10T11:14:15+00:00 2f75fbf16bd87f36f3e72396b603bc6689e04be4 Signed-off-by: Paul Mundt <lethal@linux-sh.org> 
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Use helpers to obtain task pid in printks (arch code) 2007-10-19T18:53:43+00:00 Alexey Dobriyan adobriyan@openvz.org 2007-10-19T06:40:41+00:00 19c5870c0eefd27c6d09d867465e0571262e05d0 One of the easiest things to isolate is the pid printed in kernel log. There was a patch, that made this for arch-independent code, this one makes so for arch/xxx files. It took some time to cross-compile it, but hopefully these are all the printks in arch code. Signed-off-by: Alexey Dobriyan <adobriyan@openvz.org> Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 
One of the easiest things to isolate is the pid printed in kernel log.
There was a patch, that made this for arch-independent code, this one makes
so for arch/xxx files.

It took some time to cross-compile it, but hopefully these are all the
printks in arch code.

Signed-off-by: Alexey Dobriyan <adobriyan@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>