* Fix caching for pwndbg.gdblib.elf functions
* Add test for cache clear priority
* Fix formatting in files
* switch priority to an enum instead of boolean
* fix logging for start event
* decouple gdblib.events import from lib.cache
* Move syscall number evaluation into instruction.py. This allows us to determine and display future syscalls
* Move string manipulation to color.disasm.py
* lint
* fix padding
* Fix x86 syscall
* comment
* disable debug mode
* Fix a test - we now remember previous syscalls as well
* Move x86 specific syscall logic to the x86 subclass
* lint
* @override decorator added to methods
* comments
* lint
* add test with emulation disabled for syscall annotation
* Fix x86/x86_64 edge cases with syscall register reading, and add test for emulation off for syscalls
* Update an outdated comment
* Tests depend on width of context banner
---------
Co-authored-by: Disconnect3d <dominik.b.czarnota@gmail.com>
* Add gdb_version to mock gdblib
* Re-enable unit tests
* Only collect unit test coverage if --cov is passed
* Source venv before running tests in github action
* Add venv path PATH in to Dockerfile
* Only check for "/ls" in `which` test
* Fix i386-32 syscall name printing
pwndbg-git from AUR shows hexadecimal constants in masm syntax
(e.g. 80h) for some reason (as if the option CS_OPT_SYNTAX_MASM was set).
This commit makes syscall name printing work regardless of hex syntax.
* riscv: Fix AssertionError on "jalr ra, ra, 0x252"
When the PC was on this instruction, the pwndbg context would not be
printed due to this AssertionError.
* riscv: Fix AssertionError on "c.jalr a5"
According to the specification, "C.JALR expands to jalr x1, 0(rs1)".
* Modify python test scripts to work from nix
* Update utils.py
* address review feedback
---------
Co-authored-by: Disconnect3d <dominik.b.czarnota@gmail.com>
* Only look for readable address in retaddr command
* Rename stack.py to retaddr.py
* Add pwndbg.gdblib.stack.callstack and use it in retaddr
* Add callstack gdb test
* Add QEMU callstack test
* V1 - annotations for values of registers and memory to display result of instructions.
* Emulator telescope(), more x86 instructions
* Emulation change - keep track of before & after instruction execution. Telescope format correctly, read size taken into account
* Add config options to configure emulation and annotations, vmovaps alignment warning, string length in disasm telescope, cache previously annotated instructions
* Create PwndbgInstruction type for better typing and easier future development
* More consistent spacing, options to disable annotations, ADD instruction shows operands
* Rebase from dev
* Correctly go to .next address in disasm view (was incorrectly going to call targets)
* Precompute register str to reduce code duplication
* Correct telescope memory read width, bring target printing back to previous behavior when symbol can be resolved
* More consistent looking annotation spacing/padding, fixed edge case bugs with cached instructions
* Even cleaner padding
* Additional comments and debugging, ironed out last bugs
* debugging tight loops
* Cache fixed - nearpc only annotates what can be statically resolved
* lint and show instructions that cannot dereference
* Reapply btrace crash fix after rebase
* Less code duplication, implement XCHG and AND instructions, moved more methods from x86 subclass to superclass
* aarch64 set flags register in Unicorn correctly
* fix
* Don't recreate emulator regname->const map every time the emulator is instantiated
* Use emulation to set .next within enhancement
* Improve ret instruction target address setting
* Green checkmarks for jumps on all architectures
* Fixed .next and .target setting
* All architectures now have correct logic for determining .next and .target. Green checkmarks for taking conditional branches now appear for all architectures, added things to determine that type of branch being taken, and simplified printing by replacing symbol_addr with new field 'target_string'
* Instruction debug print fix
* Correct jump instruction checking
* Fixed target_string resolution
* Fix conditional jump check, also make default target resolution better
* target_const determined more accurately
* reverse iteration order of last change
* Pwndbg.condition is more retyped and more correct, make manual determinations of condition override the emulators (it can be incorrect in cases). Uncover why MIPS sometimes takes incorrect jumps in the emulator (delay slot)
* MIPS annotations work really good now. Jumps are correctly predicted (with green checkmarks). Implemented manual condition() function for MIPS. Only highlight the correct instance of instruction at PC when there are multiple in view (tight loops). Allow manual .condition to override emulator in determiningg .next.
* Additional debug info on instructions
* Print arch in instruction
* aarch64 branch fix
* aarch64 branch fix (real)
* lint
* Final changes - fixing .size error
* lint
* Add dev_dump_instruction command, add default memory read in resolve_used_value, update comments and remove .size from enhancedoperand as it only exists on x86
* More uniform spacing on annotations
* Various comments converted to docstrings, aarch64 enhancer created, post-rebase
* import aarch64
* Aarch64 mov, ldr, add, sub
* adrp
* ADR
* lint
* Fun with git rebase
* lint
* lint again after re-installing dependencies
* New caching strategy implemented to ensure no state caching when jumping large distances. Handled edge cases of user manually setting a register or memory, 'set regname=2'
* lint
* Fixed two regressions (nearpc shouldn't take jumps, even ones we know statically, and replace all constants in the assembly with symbols). Tweak tests to reflect new annotations
* lint
* one last test
* Fix chain format dereferencing for non-singleton lists, now correctly deferences and displays chains for future instructions when not emulating (dereference until pointer goes to writable memory)
* Add jumps-only setting to emulation (on, off, jumps-only), fixes to chain deferencing and enhancing
* Properly dereference memory before and after execution of instructions, adding a new before_value_resolved field (same for after). This also reduces code duplication.
* Debogusify the format()/telescoping dereferencing logic
* lint
* post-rebase fixes
* Fix case the breaks a test - don't attempt to read larger than ptrsize such as in SIMD instruction memory reads
* Typo in emulate setting
* Developer docs for annotations
* Fix case where emulator attempts to read and unpack very large, 16 byte+ wide values while telescoping
* Add a helper command to find valid one_gadget for current context
* Refactor the function for getting section address
* Rename the command to onegadget for more convenient typing
* Make the output format cleaner
* Add a simple cache mechanism for the one_gadget output
* Update the warning message
* Use MD5 instead of BLAKE2 for computing the file hash
I thought that BLAKE2 was faster than MD5, but it doesn't seem correct here somehow (probably because of the implementation of Python!?)
Here's the script I used for benchmarking:
```python
import hashlib
import timeit
def compute_file_hash_1() -> str:
h = hashlib.blake2b()
with open("/lib/x86_64-linux-gnu/libc.so.6", "rb") as f:
h.update(f.read())
return h.hexdigest()
def compute_file_hash_2() -> str:
h = hashlib.md5()
with open("/lib/x86_64-linux-gnu/libc.so.6", "rb") as f:
h.update(f.read())
return h.hexdigest()
print(timeit.timeit(compute_file_hash_1, number=1000))
print(timeit.timeit(compute_file_hash_2, number=1000))
```
I executed the above script on various machines, and the results seem to show that MD5 outperforms BLAKE2 in this scenario. (On my x86 VM running through QEMU on my M1 MacBook, BLAKE2 even takes almost twice as long as MD5.)
* Add the tests for `onegadget` command
* Fix lint issue
* Try to cover more code
* Fix lint issue
* Fix illogical tests
* Rename one_gadget to onegadget
* Use `pwndbg.lib.tempfile.cachedir` for `onegadget`
* Call `pwndbg.lib.tempfile.cachedir` only once
* Add support for breaking on UAF
* Small fixes and documentation
* Add a command to enable and disable tracking, better diagnostics
* Add initial support for calloc and realloc
* Better safeguard against matching ld.so malloc
* Small fixes
* Better interface for managing the heap tracker. More terse and information dense diagnostics
* Add warning and fix lints
* Update poetry lock
Hopefully fixes#1947 by fetching stacks only when they are used instead
of doing it on each stop event. It will also first try to compute stacks
dictionary based on vmmap and if it fallbacks to exploring stacks if
vmmap is not present.
* [WIP] Port gdb-tests from bash to python
* Use threads instead of processes
* Port gdb tests to python
* Linting
* Fix coverage "again"
* Remove bash tests
---------
Co-authored-by: intrigus <abc123zeus@live.de>
Previously test scripts would just indiscriminately kill all qemu
processes on the system. This would kill other debug sessions I had
running. These changes make the test scripts record the qemu pids they
run and only kill those.
The old scripts would also not allow you to specify a gdb port, so
if you were already running a debug session with port 1234, the tests
would fail. This update allows you to pass --gdb-port=NNNN to use a
non-default port. You can pass -Q to preserve failing qemu instances.
The scripts now also will show qemu errors to console, and will warn
the user if there is a qemu port conflict.
Also update gdb-pt-dump submodule as it has been updated recently to not
throw an exception when multiple qemu processes are running. The
exception thrown in the event of a failure also changed, so
this has also been updated on the pwndbg side.
OBarronCS
Jason An
Matt
Gulshan Singh
Aaron Adams
charif
Lennard Hofmann
Piotr Zarycki
CptGibbon
jetchirag
Aryaman Sharma
Alan Li
Albert Gierlach
Hubert Jasudowicz
Disconnect3d
keymoon
intrigus-lgtm
Aaron Adams
duckl1ng
smiley
ntsleep