Commit Graph

14 Commits

Author SHA1 Message Date
David Howells c140d87995 Disintegrate asm/system.h for IA64
Disintegrate asm/system.h for IA64.

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Tony Luck <tony.luck@intel.com>
cc: linux-ia64@vger.kernel.org
2012-03-28 18:30:02 +01:00
Phil Carmody 04a3440690 [IA64] unwind - optimise linked-list searches for modules
It's clear from the comment in the code about keeping the
kernel's unwind table at the front of the list that some
attention has been paid to access patterns. Tests on other
architectures have shown that a move-to-front optimisation
improves searches dramatically.

Signed-off-by: Phil Carmody <ext-phil.2.carmody@nokia.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2010-09-14 13:35:39 -07:00
Phil Carmody 747584be04 [IA64] unwind: remove preprocesser noise, and correct comment
The expression in the comment was mis-bracketted.
There was also no need to introduce a coding-style breaking
macro for a single use, so just made it a static const.

Signed-off-by: Phil Carmody <ext-phil.2.carmody@nokia.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2010-09-14 13:34:43 -07:00
Roel Kluin aa2f63c954 [IA64] Do not go beyond ARRAY_SIZE of unw.hash
static struct {

... :114
        unsigned short hash[UNW_HASH_SIZE];

... :2152
	for (index = 0; index <= UNW_HASH_SIZE; ++index) {

This is a bug, isn't it?

s/<=/</

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2009-02-25 11:48:04 -08:00
Harvey Harrison d4ed80841a [IA64] remove remaining __FUNCTION__ occurrences
__FUNCTION__ is gcc-specific, use __func__

Long lines have been kept where they exist, some small spacing changes
have been done.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-03-06 09:19:27 -08:00
Keith Owens 66fa9b107e [IA64] Correct unwind validation code
Both rp_loc and pfs_loc can be in the register stack area _or_ they can
be in the memory stack area, the latter occurs when a struct pt_regs is
pushed.  Correct the validation check on these fields to check for both
stack areas.  Not allowing for memory stack locations means no
backtrace past ia64_leave_kernel, or any other code that uses
PT_REGS_UNWIND_INFO.

Signed-off-by: Keith Owens <kaos@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2007-06-26 13:33:10 -07:00
Robin Holt e2e6fe7bb6 [IA64] Improve unwind checking.
This patch adds some sanity checks to keep register and memory stack
pointers in the unw_frame_info structure within the tasks stack address
range.

Signed-off-by: Robin Holt <holt@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2007-05-22 10:14:36 -07:00
Simon Arlott 72fdbdce3d [IA64] spelling fixes: arch/ia64/
Spelling and apostrophe fixes in arch/ia64/.

Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2007-05-11 14:55:43 -07:00
Kirill Korotaev 690def2141 [IA64] unwind did not work for processes born with CLONE_STOPPED
Minor problem for mainstream. Big problem for checkpoint/restore,
because all the stopped/traced processes are born in this state,
hence they cannot be checkpointed again due to failing unwind.

The problem was identified as assumption in kernel unwind library
that top level frame is different of syscall frame. It is the case
unless process was born with CLONE_STOPPED.

Author: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Signed-Off-By: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Signed-Off-By: Kirill Korotaev <dev@sw.ru>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2007-05-08 14:51:42 -07:00
Milind Arun Choudhary 8737d59579 [IA64] SPIN_LOCK_UNLOCKED macro cleanup in arch/ia64
SPIN_LOCK_UNLOCKED macro cleanup, use __SPIN_LOCK_UNLOCKED instead.

Signed-off-by: Milind Arun Choudhary <milindchoudhary@gmail.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2007-05-08 12:00:39 -07:00
Keith Owens 49a28cc8fd [IA64] MCA/INIT: remove obsolete unwind code
Delete the special case unwind code that was only used by the old
MCA/INIT handler.

Signed-off-by: Keith Owens <kaos@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2005-09-11 14:09:34 -07:00
Keith Owens b833961bd3 [IA64] unwind.c uses wrong unat from switch_stack
unwind.c can read the wrong unat bits from switch_stack.
sw->caller_unat is the value of ar.unat when the task was blocked.
sw->ar_unat is the value of ar.unat after doing st8.spill for r4-7.
IOW, ar_unat is caller_unat with 4 bits changed.

unw_access_gr() uses sw->ar_unat for r4-7 (correct), but it also uses
sw->ar_unat for other scratch registers (incorrect).  sw->ar_unat
should only be used for r4-7, everything else should use
sw->caller_unat, unless modified by unwind info.  Using sw->ar_unat
risks picking up the 4 bits that were overwritten when r4-7 were saved.

Also this line is wrong
	unw.sw_off[unw.preg_index[UNW_REG_PFS]] = SW(AR_UNAT);
and should be
	unw.sw_off[unw.preg_index[UNW_REG_PFS]] = SW(AR_PFS);

Signed-off-by: Keith Owens <kaos@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2005-07-27 14:18:08 -07:00
Keith Owens e8d1cb2f28 [IA64] Tighten up unw_unwind_to_user check
Detect user space by the unwind frame with predicate PRED_USER_STACK
set, instead of a user space IP.  Tighten up the last ditch check for
running off the top of the kernel stack.

Based on a suggestion by David Mosberger, reworked to fit the current
tree.  This survives my stress test which used to break 2.6.9 kernels.
Unlike 2.6.11, the stress test now unwinds to the correct point, so
gdb can get the user space registers.

Signed-off-by: Keith Owens <kaos@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2005-04-25 11:45:26 -07:00
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00