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26 commits

Author SHA1 Message Date
Arun Sharma
781d5d5263 One time whitespace fixup.
for f in $(find src include -name '*.[ch]'); do
  expand -t 8 $f > $tmp; mv $tmp $f;
done
2014-09-27 09:47:23 -07:00
Filip Nyback
e1804829ca Add fast stack trace on ARM.
Port of the fast stack trace feature to ARM.
2014-07-30 14:25:14 +03:00
Tommi Rantala
5d0f376b08 Invert tdep_init() flag logic
Invert the flag that signals that tdep_init() was called, to move the
symbol from data to BSS.
2012-09-28 14:06:07 +03:00
Tommi Rantala
1dc66bd181 ARM: implement dwarf_to_unw_regnum() macro without table 2012-08-21 22:30:46 +03:00
Martin Milata
d93d96ad83 Fix compilation on IA64
- Add tdep macro for {dwarf,ia64}_find_unwind_table so that ia64
   doesn't try to use dwarf code.
 - Fix extraneous #if.
 - Fix mistyped filename in Makefile.am.
 - Link ia64-specific tests with correct libraries.

Signed-off-by: Martin Milata <mmilata@redhat.com>
2012-05-23 20:52:28 -07:00
Ken Werner
0eba2169fb [ARM] Add support for systems that don't support ucontext.h
Define unw_tdep_context rather than using ucontext_t in order to support
systems that lack ucontext.h. Note that POSIX.1-2008 removed getcontext,
makecontext and swapcontext from its specification.

Signed-off-by: Ken Werner <ken.werner@linaro.org>
2011-10-29 17:12:43 -07:00
Ken Werner
d83846f120 ARM: Initial support for remote unwinding using libunwind-ptrace
Change _UPTi_find_unwind_table to also look for the ARM specific unwind
information. Adjust the ARM unwind code to read memory using the accessor
routines.

Signed-off-by: Ken Werner <ken.werner@linaro.org>
2011-08-15 20:12:54 +02:00
Ken Werner
545023c207 Rework the lookup of the ARM specific unwind info
Implement routines for finding the proc_info and searching the unwind table
for the ARM backend.

Signed-off-by: Ken Werner <ken.werner@linaro.org>
2011-08-15 20:12:54 +02:00
Ken Werner
25f6b8295d Change address type from void* to unw_word_t.
Signed-off-by: Ken Werner <ken.werner@linaro.org>
2011-07-28 11:10:02 +00:00
Ken Werner
264b101905 Move arm_exidx_entry and arm_exidx_table structs from ex_tables.h into libunwind-arm.h.
Signed-off-by: Ken Werner <ken.werner@linaro.org>
2011-07-15 11:57:55 +00:00
Ken Werner
36511d3d1f Add support for handling signal frames on ARM Linux.
This patch add support for resuming at a certain stack frame even if signal
frames are involved. For restoring the registers the trampoline (sigreturn)
is used. RT and non-RT signal frames are handled for both >=2.6.18 and
<2.6.18 kernels.

Signed-off-by: Ken Werner <ken.werner@linaro.org>
2011-05-03 20:18:40 +02:00
Arun Sharma
e2962af9d3 Implement a cheaper getcontext()
Since the fast unwinding code path doesn't need the full context,
a faster target dependent getcontext is implemented.

Signed-off-by: Lassi Tuura <lat@cern.ch>
2011-04-05 22:07:05 -07:00
Ken Werner
fd21d07fe4 Create a generic and local variant of the extbl parser.
In order to have the DWARF_* macros working properly a generic and a local
variant of the ex_tables.c have been created.

Signed-off-by: Ken Werner <ken.werner@linaro.org>
2011-04-05 20:59:10 -07:00
Lassi Tuura
5f38f35d5d Drop a call frame in tdep_trace and avoid a call to unw_step.
Dropping the extra frame for unw_backtrace itself using unw_step is
approximately 15% slower than skipping the frame in tdep_trace.  So
drop the frame in the latter, and make the function a private
implementation detail for libunwind, not an exported interface.

Also moves unw_getcontext call back into unw_backtrace to avoid an
extra call frame in case slow_backtrace does not get inlined into
unw_backtrace.
2011-04-01 00:00:39 -07:00
Lassi Tuura
9e98f15e9a Fast back-trace for x86_64 for only collecting the call stack.
Adds new function to perform a pure stack walk without unwinding,
functionally similar to backtrace() but accelerated by an address
attribute cache the caller maintains across calls.
2011-03-24 22:33:17 -07:00
Ken Werner
f053677198 Remove the ARM_EXIDX_TABLE_MALLOC code path.
Using malloc is not an option since unw_init_local and unw_step are supposed
to be async signal safe. Therefore this code path can be removed.

Signed-off-by: Ken Werner <ken.werner@linaro.org>
2011-03-24 20:44:33 -07:00
Ken Werner
6296ff1fb2 Remove the appname string of the ARM extbl parser.
There is no need for libunwind to set/fake a name of the elf file from which
the program header came from.

Signed-off-by: Ken Werner <ken.werner@linaro.org>
2011-03-24 20:44:33 -07:00
Ken Werner
fb325c895e ARM extbl cleanup.
Move code that does not necessarily need to reside in the ex_tables.h header
file into ex_tables.c. Add comments and remove unused code.

Signed-off-by: Ken Werner <ken.werner@linaro.org>
2011-03-24 20:44:25 -07:00
Ken Werner
cf8d5e41af Have the ARM extbtl-parser operate on the DWARF model directly.
This eliminates the arm_stackframe and therefore the need to synchronize the
two models. It also clears the way for unwinding call stacks with mixed
DWARF- and extbl-frames.

Signed-off-by: Ken Werner <ken.werner@linaro.org>
2011-03-24 20:42:00 -07:00
Zachary T Welch
6a67154674 Use ARM-specific unwinding tables in unw_step
Uses ex_tables routines to provide a new means of unwinding the stack.
Set UNW_ARM_UNWIND_METHOD=4 to use ARM-specific unwinding tables.

Signed-off-by: Ken Werner <ken.werner@linaro.org>
2011-03-22 08:14:58 -07:00
Zachary T Welch
ffc474b8c8 Add module for parsing ARM-specific unwind tables
Handles lookup, extracting unwind entries, and decoding the entry
using a callback mechanism.

Signed-off-by: Ken Werner <ken.werner@linaro.org>
2011-03-22 08:14:51 -07:00
Ken Werner
ec633a1911 Use UNW_OBJ instead of UNWI_ARCH_OBJ to rename unwi_unwind_method on ARM.
This results in different unwi_unwind_method symbol names for the local and
generic versions. It allows to statically link against both libraries.

Signed-off-by: Ken Werner <ken.werner@linaro.org>
2011-03-07 21:24:51 -08:00
Arun Sharma
00aed9631b Add an experimental and optional frame chain unwinding for ARM
The environment variable UNW_ARM_UNWIND_METHOD controls the unwind method.

1 - debug_frame unwinding
2 - frame chain unwinding,
3 - 1 & 2 (default))

Signed-off-by: Andris Zeila <andris.zeila@accenture.com>
2010-05-26 19:28:44 -07:00
Arun Sharma
1787a2fd28 Add path and pathlen arguments to tdep_get_elf_image()
Signed-off-by: Andris Zeila <andris.zeila@accenture.com>
2010-05-15 12:14:09 -07:00
Lassi Tuura
dac2d001af Identify signal frames by augmentation attribute. 2010-04-24 17:18:26 -07:00
Daniel Jacobowitz
3842dac733 Add initial ARM and MIPS support. To support this, also enable the
reading of .debug_frame sections (used in lieu of .eh_frame sections
when they're not available).
2008-02-04 17:16:37 -07:00