linux.git/arch/sh/kernel/entry-common.S, branch v2.6.23 Linux kernel source tree sh: Clear UBC when not in use. 2007-03-05T05:13:25+00:00 Stuart Menefy stuart.menefy@st.com 2007-02-23T04:22:17+00:00 9432f96803139adaff0cd9f4fa38b7fb99cda366 This takes care of tearing down the UBC so it's not inadvertently left configured at the next context switch time. Failure to do this results in spurious SIGTRAPs in certain debug sequences. Signed-off-by: Stuart Menefy <stuart.menefy@st.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org> 
This takes care of tearing down the UBC so it's not inadvertently
left configured at the next context switch time. Failure to do
this results in spurious SIGTRAPs in certain debug sequences.

Signed-off-by: Stuart Menefy <stuart.menefy@st.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
sh: Use a jump call table for debug trap handlers. 2007-02-13T01:54:43+00:00 Paul Mundt lethal@linux-sh.org 2006-12-13T08:40:05+00:00 f413d0d9fa7abcecc40e115cf4aead372d164a75 This rips out most of the needlessly complicated sh_bios and kgdb trap handling, and forces it all through a common fast dispatch path. As more debug traps are inserted, it's important to keep them in sync for all of the parts, not just SH-3/4. As the SH-2 parts are unable to do traps in the >= 0x40 range, we restrict the debug traps to the 0x30-0x3f range on all parts, and also bump the kgdb breakpoint trap down in to this range (from 0xff to 0x3c) so it's possible to use for nommu. Optionally, this table can be padded out to catch spurious traps for SH-3/4, but we don't do that yet.. Signed-off-by: Paul Mundt <lethal@linux-sh.org> 
This rips out most of the needlessly complicated sh_bios and kgdb
trap handling, and forces it all through a common fast dispatch path.
As more debug traps are inserted, it's important to keep them in sync
for all of the parts, not just SH-3/4.

As the SH-2 parts are unable to do traps in the >= 0x40 range, we
restrict the debug traps to the 0x30-0x3f range on all parts, and
also bump the kgdb breakpoint trap down in to this range (from 0xff
to 0x3c) so it's possible to use for nommu.

Optionally, this table can be padded out to catch spurious traps for
SH-3/4, but we don't do that yet..

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
sh: Fixup sh_bios() trap handling. 2006-12-11T23:42:09+00:00 Paul Mundt lethal@linux-sh.org 2006-12-11T11:29:28+00:00 1dc417d0390b4897dc1d9bbf335e325baecae2c3 This was inadvertently broken when the entry.S code split up, restore the missing branch and get subsequent traps working under debug again. This manifested itself as a lockup when attempting to reload the VBR base. Signed-off-by: Paul Mundt <lethal@linux-sh.org> 
This was inadvertently broken when the entry.S code split up,
restore the missing branch and get subsequent traps working
under debug again. This manifested itself as a lockup when
attempting to reload the VBR base.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
sh: stacktrace/lockdep/irqflags tracing support. 2006-12-06T01:45:40+00:00 Paul Mundt lethal@linux-sh.org 2006-12-04T09:17:28+00:00 afbfb52e47273a440df33274452c603e8c332de2 Wire up all of the essentials for lockdep.. Signed-off-by: Paul Mundt <lethal@linux-sh.org> 
Wire up all of the essentials for lockdep..

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
sh: Fix syscall tracing ordering. 2006-12-06T01:45:38+00:00 Stuart Menefy stuart.menefy@st.com 2006-11-24T04:01:36+00:00 e0969e0c9b609fdfe217e34f3e046179ffe88eb6 The implementation of system call tracing in the kernel has a couple of ordering problems: - the validity of the system call number is checked before calling out to system call tracing code, and should be done after - the system call number used when tracing is the one the system call was invoked with, while the system call tracing code can legitimatly change the call number (for example strace permutes fork into clone) This patch fixes both of these problems, and also reoders the code slightly to make the direct path through the code the common case. Signed-off-by: Stuart Menefy <stuart.menefy@st.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org> 
The implementation of system call tracing in the kernel has a
couple of ordering problems:

 - the validity of the system call number is checked before
   calling out to system call tracing code, and should be
   done after

 - the system call number used when tracing is the one the
   system call was invoked with, while the system call tracing
   code can legitimatly change the call number (for example
   strace permutes fork into clone)

This patch fixes both of these problems, and also reoders the
code slightly to make the direct path through the code the
common case.

Signed-off-by: Stuart Menefy <stuart.menefy@st.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
sh: Exception vector rework and SH-2/SH-2A support. 2006-12-06T01:45:36+00:00 Yoshinori Sato ysato@users.sourceforge.jp 2006-11-05T07:15:19+00:00 de39840646a223ae13a346048c280b7c871bf56e This splits out common bits from the existing exception handler for use between SH-2/SH-2A and SH-3/4, and adds support for the SH-2/2A exceptions. Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org> 
This splits out common bits from the existing exception handler for
use between SH-2/SH-2A and SH-3/4, and adds support for the SH-2/2A
exceptions.

Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>