hiI am progressing in the implementation of the proposal "GDB process record and replay with ARM Coresight" https://lists.linaro.org/pipermail/coresight/2019-July/003021.html
so far I was able to use perf events to configure the drivers for etm and collect the traces. the code was tested successfully on an STM32MP157A discovery kit (arm v7). and I can collect the traces from the perf mmapped aux area.
For parsing them I needed to gather information about the cpu and etm registers. those are available in the events of type PERF_RECORD_AUXTRACE_INFO in the priv section. priv is a kind of "opaque" data structure where the layout is depending on the perf pmu drivers. the implementation of perf tool gives a good example to follow. I needed also to make a wrapper around opencsd library and again perf was offering a good example to follow.
those are good reasons to think about factoring out the functionality of parsing etm traces on linux system in a dedicated library that can be reused by other software, a kind of libcoresightperf.is there any plan or ongoing activities for such a library?
Kind RegardsZied Guermazi
== Progress ==
* More EuroLLVM submissions reviews
* More investigations into Morello bare metal debugging
* Started looking into updating lldb for the latest Morello architecture
changes
* Asked Adhemerval to look into PR44157
== Plan ==
* More Morello
* Keep an eye out for 10.0.0 - rc1
[VIRT-327 # Richard's upstream QEMU work ]
* Implement x86_64-linux-user vsyscall page,
which should keep Peter's pre-merge testing working.
* Another tcg queue pull without the bits that depend
on the vsyscall implementation above.
* Posted v2 of some fixes to -accel option processing.
* Posted v2 of some fixes to target/arm syn data syndrome bits.
* Wrote some test cases for a target/arm pauth sbox fix.
* Investigated a fix for memory layout of -static-pie binaries.
* Random patch review.
r~
QEMU Tooling ([VIRT-252])
=========================
Extend gdbstub for SVE ([VIRT-281])
- posted [PATCH v5 00/22] gdbstub refactor and SVE support (+check-tcg
tweaks) Message-Id: <20200114150953.27659-3-alex.bennee(a)linaro.org>
[VIRT-281] <https://projects.linaro.org/browse/VIRT-281>
Upstream Work ([VIRT-109])
==========================
- played with [for-5.0 PATCH 00/11] Support for reverse debugging with
GDB Message-Id:
<157709434917.12933.4351155074716553976.stgit@pasha-Precision-3630-Tower>
- still broken but could be build stability
- while reviewing vsyscall patches ran into qemu-x86_64, buster
/sbin/ldconfig and setup_arg_pages (a mind dump) Message-Id:
<874kwukmxr.fsf(a)linaro.org>
- posted [qemu-web PATCH] documentation: update links to readthedocs
Message-Id: <20200113103550.1133-1-alex.bennee(a)linaro.org>
- we successfully recovered the qemu project name for rtd
[VIRT-109] <https://projects.linaro.org/browse/VIRT-109>
Completed Reviews [3/3]
=======================
[for-5.0 PATCH 00/11] Support for reverse debugging with GDB
Message-Id: <157709434917.12933.4351155074716553976.stgit@pasha-Precision-3630-Tower>
- CLOSING NOTE [2020-01-13 Mon 18:00]
Introduces some regressions into check-block that need to be fixed
first.
Added: <2020-01-06 Mon>
[PATCH 0/4] migration: Replace gemu_log with qemu_log
Message-Id: <20200114030138.260347-1-jkz(a)google.com>
[PATCH 0/3] linux-user: Implement x86_64 vsyscalls
Message-Id: <20200114210921.11216-4-richard.henderson(a)linaro.org>
Current Review Queue
====================
* [PATCH v2 0/7] configure: Improve PIE and other linkage
Message-Id: <20191218223441.23852-1-richard.henderson(a)linaro.org>
Added: <2020-01-06 Mon>
* {RFC PATCH v3 000/132} Proof of concept for Meson integration
Message-Id: <1576155176-2464-1-git-send-email-pbonzini(a)redhat.com>
Added: <2019-12-12 Thu>
* {PATCH 0/2} tests/acceptance: Add boot vmlinux test
Message-Id: <20191206140012.15517-1-wainersm(a)redhat.com>
Added: <2019-12-06 Fri>
* {RFC PATCH 00/10} hw/avr: Introduce the Arduino board
Message-Id: <20191128015030.27543-1-f4bug(a)amsat.org>
Added: <2019-11-28 Thu>
--
Alex Bennée
== Progress ==
* BFD Linker:
- GNU-629: non-contiguous memory support: found problems in the
testsuite when the flag is activated by default
* GCC:
- trying to find a way to add run more validation of -mpure-code on
v6m, to support a request to backport to gcc-9: need to patch newlib's
crt0.S which has some offending sequences
* GCC upstream validation:
- updated scripts to cope with the new git repo and release branches names
* misc:
- infra fixes / troubleshooting / reviews
- fixed problems with automatic bisection of gcc regressions
== Next ==
* Binutils: GNU-629: support non-contiguous memory regions in linker
* GCC-9: continue work for validation of -mpure-code on v6m
Morello
- Upstream LLD INPUT_SECTION_FLAGS that I implemented downstream.
Quite a few review comments to work through but I think I'm close to
getting something accepted. This will hopefully come in useful for LLD
with embedded systems.
- Wrote down some definitions for the new relocations.
LLD
- landed fix for clang-built-linux-812 linux allyesconfig problem.
- Quite a few upstream LLD and MC reviews
Other
Some research for the clang built linux conference.
== Progress ==
* Out of office for 2 days
* Reviewed EuroLLVM submissions
* A bit more investigation into Morello bare metal debugging
== Plan ==
* PR44157
* Morello bare metal debugging
Hello Linaro team,
I want to use your cross compiler version 6.3.1, but I miss the library
asound and its header (alsa/asoundlib.h)
What do I need to do to fix this ?
Best regards,
Markus Bollinger
