* fix#1111 errno command edge case
This commit fixes the case when errno command causes a binary to
segfault when the `__errno_location` symbol was defined but its .plt.got
entry was not filled yet by the dynamic loader (ld.so), so e.g. when the
glibc library was not loaded yet.
In such a case, us triggering a call to `__errno_location` function
triggered a jump to an unmapped address. Now, we dereference that
.plt.got symbol and see if it lives in mapped memory.
* add tip about errno command
* errno: fix case when __errno_location@got.plt is missing
* fix lint
* fix sh lint
* fix errno test
* Don't exclude pwndbg/lib in .gitignore
* Move which.py to lib/which.py
* move funcparser.py and functions.py to lib/
* moved version.py to lib/
* Move tips.py to lib/
* Update pwndbg/lib/version.py
Co-authored-by: Disconnect3d <dominik.b.czarnota@gmail.com>
This should fix things like:
> tests/test_heap.py::test_try_free_invalid_next_size_fast Dwarf Error: DW_FORM_strx1 found in non-DWO CU [in module /pwndbg/tests/binaries/heap_bugs.out]
* Fix some bugs of the aarch64 heuristic and a bug about tcache
* Some orders of the aarch64 assembly instructions might have a little bit different, so I make it more general. Some bugs of the older version can reproduce by the libc here (https://github.com/perfectblue/ctf-writeups/tree/master/2019/insomnihack-teaser-2019/nyanc/challenge)
* If we didn't find the correct tcache symbol address via heuristic, we will now use our fallback strategies for it.
* Refactor the code in a cleaner way
See https://github.com/pwndbg/pwndbg/pull/1029#discussion_r945934337
* Update the fallback solution of finding `main_arena`
* Since the arenas are a circular linked list, we can iterate it to check the address we guess is `main_arena` or not (https://github.com/pwndbg/pwndbg/pull/1029#discussion_r945335543)
* Update the boundaries of the address we might guess to avoid some unneeded tests
* Remove guard code for `mp_` before we test the fallback solution
Fix https://github.com/pwndbg/pwndbg/pull/1029#discussion_r945338469
* Refactor TLS features and fix a bug about fsbase/gsbase
* Move TLS features into an external module, and now the user can use the `tls` command to get its address (https://github.com/pwndbg/pwndbg/pull/1029#discussion_r945336737)
* Avoid `ValueError: Bad register` when trying to access fsbase/gsbase if the current arch is i386
* Fix a bug about tls finding for i386: `__errno_location` not always in `libc.so.6`, sometimes it will also in `libpthread-*.so`
* Update the comments about finding tcache
* Use `exit` event to avoid unnecessary reset
* Add a paramter for GLIBC version
* Update some strategies of heuristic
* Try to resolve heap via debug symbols even when using the heuristic
(By doing this, the binary compiled with `--static` flag can work with the heuristics by setting the GLIBC version manually)
* Try to avoid false positives when finding the symbol address and TLS base via heuristic
* Refactor some useless code
* Update the descriptions of the heap config
* Update the tips for the heap heuristics features
* Raise error when user set the GLIBC version in the wrong format
* Use `reset_on_start` with `glibc._get_version`
See https://github.com/pwndbg/pwndbg/pull/1075#discussion_r957899458
* Remove some unnecessary information in the hint message
See https://github.com/pwndbg/pwndbg/pull/1075#discussion_r957900468
* Use black to fix the format
* Fix indent
* Use black to fix the format
* improve start and entry commands description
Now, those commands will display proper description, describing when
they actually stop and what else can you do (e.g. run `starti` command
if u need to stop on first stop!).
* Update start.py
* ArgparsedCommand: fix `help cmd` and `cmd --help` behavior
Before this commit there was always a mismatch of what was displayed
when the user did `<command> --help` or `help <command>`.
With those changes, we fetch the help string from the argument parser
and render it as the command object's `self.__doc__`, so that it will be
displayed during `help <command>`.
Previously, we only displayed the command description during help.
* fix the pwndbg [filter] command that was broken in previous commit
* add riscv:rv64 registers
base on https://github.com/pwndbg/pwndbg/pull/829 by Tobias Faller <faller@endiio.com>
* disassemble without capstone to support other architectures
* ignore gdb.error on context_backtrace
* Don't format gdb-pt-dump with black
* Move isort configuration into pyproject.toml
* Exclude gdb-pt-dump from flake8
* Set flake8 max line length to 100
This commit cleans up the commands/__init__.py a bit by removing the
`QuietSloppyParsedCommand` that we do not use anymore.
The last command that used it was `brva` which was just an alias for
`breakrva`, so now we just set it as an alias using the
`ArgparsedCommand` as it should be done.
* Make ZIGPATH configurable and provide defaults
Mostly fixes docker/docker-compose environment where building zig into
$pwd/.zig doesn't work well because it is later overwritten by mounting
the volume in /pwndbg.
With current approach during the docker build zig is put in /opt/zig
instead, and when you run it without docker it's possible to configure a
different path (with sane defaults)
* remove Makefile
* add ZIGPATH to tests.sh for CI
* move ZIGPATH setting before make in tests
* tools: change zig to install from a tarball
Migrate from using snap, we install from a cheksumed tarball
* fix: add sudo
* fix: install zig to .zig in PWD
Co-authored-by: Albert Koczy <albert.koczy@asseco.pl>
* Add Bins classes and refactor allocator methods to return them
* Refactor bins() and related commands
* Refactor malloc_chunk
* Use chunk_size_nomask in top_chunk()
* Refactor vis_heap_chunks
* Rename read_chunk to read_chunk_from_gdb and move to ptmalloc.py
* Add get_first_chunk_in_heap and use it in heap and vis_heap_chunks commands
* Move some methods from DebugSymsHeap to Heap base class
* Strip type hints from heap.py and ptmalloc.py
* Set heap_region before using it
* Fix test_heap_bins test
* Fix try_free
This commit improves the `search --next ...` speed by making it so that
only the saved addresses are checked. Previously, the command performed
a full search even in the presence of `--next` flag and only afterwards
filtered the results. That resulted in extremely slow execution e.g.
when debugging processes with gigabytes of allocated memory.
The commit also adds a `--trunc-out` argument which makes it so that
only 20 results are displayed. This is helpful when performing a
CheatEngine-style search when we try to locate a given field/value
address in memory by first finding its known value, then changing its
value in the program and then re-searching the space.
The `--trunc-out` argument could further be improved by enabling it
default and making users aware that the results were truncated.
This PR removes ~40 commands that could be used to run shell programs.
I am removing this since GDB has the support for running shell programs
with either `shell <command...>` or `<!command...>` and so we do not
need this feature in Pwndbg anymore.
This feature also bloated Pwndbg a little bit and made more interesting
commands harder to find e.g. through the `pwndbg` command.
Gulshan Singh
Disconnect3d
Alan Li
syheliel
Lonny Wong
NT Sleep
alufers
Artur Czepiel
Arusekk
Takumi Akiyama
Lukasz Taczuk