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Author SHA1 Message Date
Arun Sharma
8297866bd4 [x86-64] (unw_step): Further refine handling of functions without unwind-info. 
CFA should be incremented by 16 in the hope that the previous frame
may have valid unwind info.

Also increase the default frame pointer recognition heuristic from 4k
to 16k.

Signed-off-by: Andrey Veskov <Andrey.Veskov@intel.com>
Signed-off-by: Arun Sharma <arun.sharma@google.com>
 2006-07-26 22:06:48 -06:00
Arun Sharma
06d2ffa41a [x86-64] (unw_step): Improve handling of functions which lack unwind info. 
If following the frame-chain leads to a frame >= 4KB away, we conclude that
the frame-pointer isn't really valid.
 2006-07-26 22:04:40 -06:00
Arun Sharma
7c0907634d [x86-64] (unw_is_signal_frame): If access mem fails, it's not a signal frame. 2006-07-26 21:58:27 -06:00
Arun Sharma
58888a5060 (dwarf_find_save_locs): Also apply register-state after parsing the FDE 2006-07-26 21:55:09 -06:00
Arun Sharma
527225e492 [x86-64] Make a best effort at validating pointers before dereferencing them. 
Signed-off-by: Arun Sharma <arun.sharma@google.com>
 2006-07-26 21:46:39 -06:00
Arun Sharma
4312719cbc [dwarf] Need to guard against multiple threads accessing the rs cache. 
Signed-off-by: Arun Sharma <arun.sharma@google.com>
 2006-07-26 21:44:38 -06:00
Arun Sharma
8cdd8bfed8 [x86-64] Make even UNW_LOCAL_ONLY accessors go through validation. 
Signed-off-by: Arun Sharma <arun.sharma@google.com>
 2006-07-26 21:39:46 -06:00
Arun Sharma
c5dc3c150a [dwarf] Allow return address column to differ from function to function. 
Signed-off-by: Andrey Veskov <Andrey.Veskov@intel.com>
Signed-off-by: Arun Sharma <arun.sharma@google.com>
 2006-07-26 21:29:50 -06:00
Arun Sharma
60b7af702a (dwarf_find_save_locs): Add a comment. 
Now that dwarf_find_save_locs() not just finds the save-locations but
also updates the cursor-state, document this fact (the function really
is misnamed now).
 2006-07-26 21:25:37 -06:00
Arun Sharma
3dfde7a3f0 (dwarf_find_save_locs): put_unwind_info() is not needed in the cached case. 2006-07-26 21:23:30 -06:00
Arun Sharma
036cbfa020 Fix x86 compilation. 
x86 needs the global_cache just like the x86-64 version.

Signed-off-by: Andrey.Veskov@intel.com
Signed-off-by: Arun Sharma <arun.sharma@google.com>
 2006-07-26 21:20:59 -06:00
Arun Sharma
00db7f752a Implement a ip -> dwarf_reg_state cache. 
Signed-off-by: Arun Sharma <arun.sharma@google.com>
 2006-07-26 21:18:49 -06:00
David Mosberger-Tang
1a0af36731 Fix forgotten copyright year update. 2006-07-26 15:48:48 -06:00
David Mosberger-Tang
03395a1c4b Turn back on execute-permission on script files. 2006-07-26 15:46:15 -06:00
David Mosberger-Tang
6a89d40236 Fix missed "tdep.h" -> "libunwind_i.h" conversions. 2006-07-26 15:44:23 -06:00
David Mosberger-Tang
8c94e12429 (_UPT_find_proc_info): Fix potential crash due to uninitialized pointer. 
Be sure to clear pi->unwind_info when looking up the kernel table and
not needing the unwind-info.  Otherwise, _UPT_put_unwind_info() may
erroneously call free() on the pointer, even though that space wasn't
malloc'd, leading to crashes..
 2006-07-26 15:43:23 -06:00
David Mosberger-Tang
fd2fa63a6c Fix missed merge on setjmp_i.h and siglongjmp.c. 2006-07-26 15:21:52 -06:00
David Mosberger-Tang
3c109eef98 Update ChangeLog to point to GIT log instead of Bitkeeper log. 2006-07-26 15:12:18 -06:00
David Mosberger-Tang
69d85f7c14 Restore mi/Ldyn-remote.c. 2006-07-26 15:10:48 -06:00
David Mosberger-Tang
37be21c01e Restore more files wiped out by Bitkeeper->CVS->GIT transition. 2006-07-26 15:09:39 -06:00
David Mosberger-Tang
9e927e7087 Restore tests/perf-startup. 
Another file that got wiped out during the Bitkeeper->CVS->GIT translation.
 2006-07-26 14:57:51 -06:00
David Mosberger-Tang
236e370dc5 Remove three Emacs backup-files which accidentially got checked into git. 2006-07-26 14:54:50 -06:00
David Mosberger-Tang
6daeeac60a Revert "Initial revision" 
This reverts e6446885f4 commit.
 2006-07-26 14:53:49 -06:00
David Mosberger-Tang
a369768c27 Revert "Initial revision" 
This reverts 06d223e924 commit.
 2006-07-26 14:47:44 -06:00
David Mosberger-Tang
ca69fee8bb Merge ../libunwind-v0.98 
Conflicts:

	include/dwarf_i.h
	include/x86/jmpbuf.h
	include/x86_64/jmpbuf.h
	src/hppa/init.h
	src/mi/Gget_fpreg.c
	src/mi/Gset_fpreg.c
	src/mi/strerror.c
 2006-07-25 21:41:43 -06:00
David Mosberger-Tang
af2503e223 Fix bug in libunwind-ptrace which can cause reading of random data. 
(maps_next): After reading less than a full buffer of data, copy
remaining data to the top of the buffer so as to maintain the
invariant that all data between mi->buf and mi->buf_end is valid.
This avoids maps_next() parsing uninitialized data.
 2006-07-25 21:35:30 -06:00
David Mosberger-Tang
cbd8648b33 Make libunwind compile with recent versions of GAS. 
Don't test read-only access to F0 and F1 registers --- according to
the SCRA manual, those locations cannot even be expressed in SPILL
descriptors and newer versions of GAS (as well as IAS) won't accept
.spillreg directives targeting those registers.
 2006-07-25 21:34:32 -06:00
David Mosberger-Tang
f176ad6fc6 Bring git v0.98.5 tree in sync with released v0.98.5. 
Sadly, the conversion from Bitkeeper -> CVS -> git wasn't perfect.  Or
so it seems.
 2006-07-25 21:32:28 -06:00
hp.com!davidm
bc09a82735 ia64: Allow write-access to UNW_IA64_BSP and UNW_IA64_SP. 
Writing UNW_IA64_BSP and UNW_IA64_SP can wreak havoc if not done
properly but can also be extremely useful when done correctly.  For
example, the Linux kernel can use this to update a cursor with the
MIN_STATE info which is saved by firmware due to an MCA or INIT event.

BKrev: 428e03020AqYSMZEt1Q3cCPH0Bj2eA
 2005-05-20 15:32:18 +00:00
hp.com!davidm
2211958a9c UNW_IA64_SP and UNW_IA64_BSP are no longer read-only. 
(Logical change 1.303)
 2005-05-20 15:32:18 +00:00
hp.com!davidm
b47b9aa232 UNW_IA64_BSP and UNW_IA64_SP are no longer read-only. 
(Logical change 1.303)
 2005-05-20 15:32:18 +00:00
hp.com!davidm
11f4871570 Regenerate. 
(Logical change 1.303)
 2005-05-20 15:32:18 +00:00
hp.com!davidm
36a0275014 Allow write-access to UNW_IA64_BSP and UNW_REG_SP. 
(Logical change 1.303)
 2005-05-20 15:32:18 +00:00
hp.com!davidm
7c986f6190 ia64: Fix typo in kernel-files.txt. 
BKrev: 428e01ddAjr7CJzIA23i8dwJQ5ueug
 2005-05-20 15:27:25 +00:00
hp.com!davidm
41db9a8a35 Adjust for renaming of ia64 -> tdep-ia64. 
(Logical change 1.302)
 2005-05-20 15:27:25 +00:00
hp.com!davidm
4591d090c5 ia64: Use update_nat() instead of equivalent open code in tdep_access_reg(). 
BKrev: 428dfb26foOQZSriLQ73ORqI0P8TQQ
 2005-05-20 14:58:46 +00:00
hp.com!davidm
cf2a44ca49 Use update_nat() instead of equivalent open code. 
(Logical change 1.301)
 2005-05-20 14:58:46 +00:00
hp.com!davidm
2bc0aee843 ia64: Allow r1 to be saved in an ABI-specific frame. 
This makes core-dumps contain the proper (user-level) value for r1
when using libunwind in the kernel.

BKrev: 428df94ebHSJQTkoDgFiQ_XgzkMxhg
 2005-05-20 14:50:54 +00:00
hp.com!davidm
f5de64f9f7 If r1 has been saved in an ABI-specific frame 
(such as an interrupt frame), access the saved
value.  Otherwise, pick it up from the unwind-info
for the matching IP.

(Logical change 1.300)
 2005-05-20 14:50:54 +00:00
hp.com!davidm
5b1dfeca70 ia64: Remove some dead code. 
BKrev: 428df06dTtluXFSTIb7fU0BDyt7ZMw
 2005-05-20 14:13:01 +00:00
hp.com!davidm
399f120c96 Drop unused readonly variable. 
(Logical change 1.299)
 2005-05-20 14:13:01 +00:00
hp.com!davidm
2c08119b53 ia64: Drop early-out-on-zero-IP from unw_step() 
The early-out causes problems in the kernel, which wants to unwind to the
end of the kernel-stack (i.e., until IP==0) and then access the user-level
state.

BKrev: 428de7a4kGcNmG2Tv5tDJMbQmqXO4w
 2005-05-20 13:35:32 +00:00
hp.com!davidm
3fa950e818 Remove early-out test when IP is zero. 
(Logical change 1.298)
 2005-05-20 13:35:32 +00:00
hp.com!davidm
3b7eb49469 ia64: Introduce rbs_get_base() to simplify Linux kernel integration. 
In the Linux kernel, we want to track the size of all register-backing stores
so we can protect against illegal memory accesses.  Enable this by introducing
an rbs_get_base() macro.

BKrev: 428de263-syBtG-G9-mlstg074gvtA
 2005-05-20 13:13:07 +00:00
hp.com!davidm
19e3bf3ea6 (rbs_switch): Use rbs_get_base() to determine the size of the register 
backing store.

(Logical change 1.297)
 2005-05-20 13:13:07 +00:00
hp.com!davidm
7a8b0ba617 (rbs_get_base): New macro. 
(Logical change 1.297)
 2005-05-20 13:13:07 +00:00
hp.com!davidm
9724ac492c (common_init): Use rbs_get_base() to determine size of register-backing store. 
(Logical change 1.297)
 2005-05-20 13:13:07 +00:00
hp.com!davidm
8236491807 ia64: Add Linux kernel support to unw_init_local(). 
As a side-effect, this gets rid of an ugly hack where unw_init_local() used
to overwrite sc_rbs_base in the ucontext_t.

BKrev: 428ddc7flum3n06RgXZ5vnW9H6qEjA
 2005-05-20 12:47:59 +00:00
hp.com!davidm
080f8423d9 Read sp and bsp via ia64_get() and then pass them to common_init(). 
(Logical change 1.296)
 2005-05-20 12:47:59 +00:00
hp.com!davidm
50bbc1fe3d (set_as_arg): New function. 
(get_initial_stack_pointers): Likewise.
(unw_init_local): Use new functions to make code more readable and add
	Linux kernel support.

(Logical change 1.296)
 2005-05-20 12:47:59 +00:00