c5fba3b0ab
Refactor section_headers_with_strtab to work with files that have shdrs but no shstrtab
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The spec allows for ELF files that have section header tables but no shstrtab. In this case,
we want to still be able to get the section headers, but signal that there was no shstrtab with
an empty option.
2022-11-10 12:05:32 -08:00
2faf0ca1b0
Update common fuzz target for hash table change
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Also, fuzz the gnu_hash table
2022-11-09 19:44:23 -08:00
4bdcb7db5f
Rework the top level documentation a bit
2022-11-09 19:35:14 -08:00
44f84dd0d8
Remove redundant hash arg from SysVHashTable.find()
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We can just calculate this from the requested name bytes.
2022-11-09 18:45:19 -08:00
aea8a233e2
Add some more unit tests for ParsingTable
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These check that there's no special alignment constraint for parsing a ParseAt out of a bytes buffer,
and a simple error case for failing to parse because the bytes are too small to parse the type.
2022-11-09 17:39:37 -08:00
4df35c65ca
Exclude .gitignore, .github/ and sample-objects/ from packaged crate
2022-11-09 16:33:10 -08:00
33e3435a7f
Add sample object with with > 0xff00 section headers
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Also add unit tests that we properly parse e_shnum and e_shstrndx out of
shdr0 in that case.
2022-11-09 16:04:28 -08:00
f747747929
Add abi constants for powerpc and powerpc64
2022-11-08 14:02:26 -08:00
19d26ae4e5
Add abi constants for RISC-V
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See: https://github.com/riscv-non-isa/riscv-elf-psabi-doc
2022-11-08 13:16:32 -08:00
8e5b699c6e
Add abi constants for x86_64
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See https://gitlab.com/x86-psABIs/x86-64-ABI
2022-11-08 12:39:45 -08:00
6fc477c645
Tweak some doc comments
2022-11-08 11:56:32 -08:00
1ce4958375
Rename ElfStream::dynamic_section() -> dynamic() to match ElfBytes
2022-11-08 11:25:42 -08:00
92f3d361c3
Change ElfStream::dynamic() to yield a DynamicTable just like in ElfBytes
2022-11-08 11:23:27 -08:00
39fe7f1a93
Add elf::to_str::d_tag_to_str()
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Converts known abi::DT_* to &'static str
2022-11-08 11:00:07 -08:00
8752084524
Move elf file Class enum over into file.rs
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It's already exported publicly here, and it feels like it really should live here.
2022-11-08 09:54:05 -08:00
1161178443
Use helper ReadBytesExt trait in a few more places
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This just helps avoid manually writing out the SliceReadError
2022-11-08 09:46:25 -08:00
4fa888778f
Add GnuHashTable which interprets the contents of a SHT_GNU_HASH section
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Also, integrate gnu_hash lookups into the arch smoke tests which look up all the dynamic symbols
in their .gnu.hash tables.
Note that the GnuHashTable::find() method does not currently take any symbol versioning
into account.
2022-11-07 23:21:05 -08:00
b50d19c244
Add some simple parsing smoke tests for the various sample architecture objects
2022-11-07 15:26:03 -08:00
dd8e9c7814
Add some sample objects for various architectures
2022-11-07 14:54:24 -08:00
073bd44ee3
Parse the ProgramHeaders into an allocated vec as part of ElfStream::open_stream()
2022-11-07 14:11:46 -08:00
643d83f078
Add abi constants for ARM32 and ARM64 (AARCH64)
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See:
https://github.com/ARM-software/abi-aa/blob/main/aaelf32/aaelf32.rst
https://github.com/ARM-software/abi-aa/blob/main/aaelf64/aaelf64.rst
2022-11-07 13:34:19 -08:00
2fa91412c2
CI: Go back to manual rustup+cargo install
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The actions-rs helpers spew out a bunch of warnings about using deprecated features that are going away soon. They also aren't any faster than the old manual way of doing things which worked fine.
2022-11-06 19:54:24 -08:00
af1b4145ac
Github action: make corpus cache additive
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The old way would just always use the cached corpus from the first run then never update the cache. If I understand this restore-keys configuration, then this should change the behavior to always update the corpus used in this latest run then try to restore from the most recent run the next time around.
2022-11-06 19:41:42 -08:00
324ccfd14f
Use actions-rs toolchain step in our fuzz action
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this seems "better" than rolling our own rustup cmd
2022-11-06 19:32:41 -08:00
16eed7f136
Run the stream fuzz target during github action
2022-11-06 19:27:35 -08:00
b73ed8ebd8
CI: Attempt at caching the fuzzing corpus
2022-11-06 19:15:30 -08:00
7672d5cf93
Rename sample object files used in tests to be more descriptive
2022-11-06 18:54:41 -08:00
73a847719f
Add to_str method note_abi_tag_os_to_str()
2022-11-06 18:36:20 -08:00
0bdefe6ebf
Remove section_data_as_symbol_table() from public ElfBytes interface
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It's easier to use symbol_table(), dynamic_symbol_table() or find_common_sections(),
so there's no need to clutter up the public interface with this.
2022-11-06 17:43:04 -08:00
498232ee7e
Add interface test for sysv_hash table on ElfBytes from find_common_sections()
2022-11-06 17:31:04 -08:00
cb987d1846
Update the README.md and top-level crate doc comment with new example
2022-11-06 14:33:50 -08:00
6d20b5a8f0
Add convenience method section_header_by_name to ElfBytes and ElfStream
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This parses out SectionHeaders from the section header table until it finds
one with a name that matches the given name.
2022-11-06 14:05:08 -08:00
f72ce6d26b
Add doc comment example for getting parsed notes
2022-11-06 13:34:15 -08:00
043238d83f
Refactor parsed Note type to lift enum up to the top level
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This gives a nice typed enum interface for parsed notes which can be easily
used in match statements etc.
2022-11-06 13:21:16 -08:00
c436b84eba
Include the os field when parsing an NT_GNU_ABI_TAG desc
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also rename patch -> subminor
2022-11-06 12:30:49 -08:00
bc5e3c4f60
Add GnuBuildIdDesc and associated NoteDesc::GnuBuildId variant
2022-11-06 12:18:15 -08:00
d4ee10f532
Add NoteDesc enum and parsing for NT_GNU_ABI_TAG note desc contents
2022-11-06 12:02:37 -08:00
2efd9b2ec7
Add abi constant for GNU-extension ELF note name ELF_NOTE_GNU
2022-11-06 11:19:54 -08:00
b845d2736a
Remove pub from CachingReader methods - this is an internal type
2022-11-05 18:56:50 -07:00
b53237960b
Fix OOM in ElfStream parsing when parsing corrupted files
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When parsing invalid ELF data with ranges larger than actual file size, CachedReader would
eagerly allocate a buffer to land the read of that huge size even though the read would later fail.
This could cause unbounded vec allocations.
CachedReader now seeks to find the actual stream lengthh at the beginning and validates read requests
against that.
Also, add fuzz testing for some basic ElfStream interfaces (that's what caught this bug).
Also, rustfmt the fuzz targets.
2022-11-05 18:40:58 -07:00
f9d1e47589
Make ElfStream parse out the SectionHeaders into an allocated Vec as part of open_stream()
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The shdrs are commonly used for nearly every other interface method, so there's no need to parse them
out lazily all the time. This interface can (and does) allocate, so let's just allocate and parse
them up front to get it out of the way for the other interface methods.
2022-11-05 18:13:07 -07:00
c06ae21afa
Expose Class in the public interface alongside FileHeader (where its used)
2022-11-05 15:07:23 -07:00
903653eba2
Update fuzzing github action for new common target
2022-11-05 14:25:34 -07:00
40240fc4af
Fix a divide by zero panic in SysVHashTable.find() for empty tables
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Also, add fuzz coverage for ElfBytes::find_common_sections() and its
associated types. This fuzzing is what discovered that panic in find().
2022-11-05 14:18:58 -07:00
6efd7c177f
Standardize ElfBytes' interfaces for the .dynamic contents to return a DynamicTable
2022-11-05 13:55:23 -07:00
40799c6961
Add ElfBytes::symbol_version_table() to get the GNU extension symbol version table.
2022-11-05 13:39:02 -07:00
bd36bba238
Update the crate doc comment
2022-11-04 23:52:54 -07:00
765dd6984a
Change endian parse to return ParseError::SliceReadError when failing to get the slice to parse from
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This error more accurately reflects the operation that failed - we're trying to get a slice
out of an in-memory buffer to perform the endian-aware integer parse. The error also has the full
slice range in its details too, which can be helpful.
2022-11-04 23:20:34 -07:00
5ec40c8731
Move FileHeader back into file.rs
2022-11-04 23:16:58 -07:00
ae16e4762e
Rename file.rs -> elf_stream.rs
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This keeps the git history intact for git blame. The next patch will move FileHeader
back over to file.rs
2022-11-04 23:08:26 -07:00
Christopher Cole