This support was partial and temporary. Now that we have
wasm object file support its no longer needed.
Differential Revision: https://reviews.llvm.org/D48744
llvm-svn: 337222
We were printing every character, even those that weren't printable. It
doesn't really make sense for this option.
The string content was sticked to its address, added two spaces in
between.
Differential Revision: https://reviews.llvm.org/D48271
llvm-svn: 336058
This change adds experimental support for SHT_RELR sections, proposed
here: https://groups.google.com/forum/#!topic/generic-abi/bX460iggiKg
Definitions for the new ELF section type and dynamic array tags, as well
as the encoding used in the new section are all under discussion and are
subject to change. Use with caution!
Author: rahulchaudhry
Differential Revision: https://reviews.llvm.org/D47919
llvm-svn: 335922
With '-elf-output-style=GNU -relocations', a header containing the number
of entries is printed before all the relocation entries in the section.
For Android packed format, we need to perform the unpacking first before
we can get the actual number of relocations in the section.
Patch by Rahul Chaudhry!
Differential Revision: https://reviews.llvm.org/D47800
llvm-svn: 334147
Resubmit of r333424. This version contains the fix for fails found by buildbots
on some targets.
This patch allows parsing GNU_PROPERTY_X86_FEATURE_1_AND
notes in .note.gnu.property sections. These notes
indicate that the object file is built to support Intel CET.
patch by mike.dvoretsky
Differential Revision: https://reviews.llvm.org/D47473
llvm-svn: 333908
Object FIle Representation
At codegen time this is emitted into the ELF file a pair of symbol indices and a weight. In assembly it looks like:
.cg_profile a, b, 32
.cg_profile freq, a, 11
.cg_profile freq, b, 20
When writing an ELF file these are put into a SHT_LLVM_CALL_GRAPH_PROFILE (0x6fff4c02) section as (uint32_t, uint32_t, uint64_t) tuples as (from symbol index, to symbol index, weight).
Differential Revision: https://reviews.llvm.org/D44965
llvm-svn: 333823
This patch allows parsing GNU_PROPERTY_X86_FEATURE_1_AND
notes in .note.gnu.property sections. These notes
indicate that the object file is built to support Intel CET.
patch by mike.dvoretsky
Differential Revision: https://reviews.llvm.org/D47473
llvm-svn: 333424
We've been running doxygen with the autobrief option for a couple of
years now. This makes the \brief markers into our comments
redundant. Since they are a visual distraction and we don't want to
encourage more \brief markers in new code either, this patch removes
them all.
Patch produced by
for i in $(git grep -l '\\brief'); do perl -pi -e 's/\\brief //g' $i & done
Differential Revision: https://reviews.llvm.org/D46290
llvm-svn: 331272
Summary:
I recently added a new dynamic tag to our fork of LLVM and when adding it
to llvm-readobj I noticed that not all DT_ values were being handled there.
Using macros in a .def file that can be included by both ELFDumper.cpp and
the ELF.h header ensures that the two don't get out of sync when new values
are added.
Reviewers: grimar, pcc, davide, espindola
Reviewed By: grimar, espindola
Subscribers: srhines, llvm-commits
Differential Revision: https://reviews.llvm.org/D44558
llvm-svn: 328099
This diff extends the output of -elf-section-groups
(llvm style, gnu style is unchanged since it's meant to be
compatible with binutils readelf) with sh_link and sh_info.
This change will enable us to use llvm-readobj -elf-section-groups
for testing llvm-objcopy's support for .group sections.
Test plan: make check-all
Differential revision: https://reviews.llvm.org/D44280
llvm-svn: 327341
Clean up the parsing of notes in llvm-readobj, improve bounds checking, and
allow the parsing code to be reused.
Differential Revision: https://reviews.llvm.org/D43958
llvm-svn: 327320
Summary:
Original change was D43313 (r326932) and reverted by r326953 because it
broke an LLD test and a windows build. The LLD test was already fixed in
lld commit r326944 (thanks maskray). This is the original change with
the windows build fixed.
llvm-svn: 326970
This patch enhances DWARFDebugFrame with the capability of parsing and
printing DWARF expressions in CFI instructions. It also makes FDEs and
CIEs accessible to lib users, so they can process them in client tools
that rely on LLVM. To make it self-contained with a test case, it
teaches llvm-readobj to be able to dump EH frames and checks they are
correct in a unit test. The llvm-readobj code is Maksim Panchenko's work
(maksfb).
Reviewers: JDevlieghere, espindola
Reviewed By: JDevlieghere
Differential Revision: https://reviews.llvm.org/D43313
llvm-svn: 326932
Introduce an extension to support passing linker options to the linker.
These would be ignored by older linkers, but newer linkers which support
this feature would be able to process the linker.
Emit a special discarded section `.linker-option`. The content of this
section is a pair of strings (key, value). The key is a type identifier for
the parameter. This allows for an argument free parameter that will be
processed by the linker with the value being the parameter. As an example,
`lib` identifies a library to be linked against, traditionally the `-l`
argument for Unix-based linkers with the parameter being the library name.
Thanks to James Henderson, Cary Coutant, Rafael Espinolda, Sean Silva
for the valuable discussion on the design of this feature.
llvm-svn: 323783
There were a few places where outs() was being used
directly rather than the ScopedPrinter object.
Differential Revision: https://reviews.llvm.org/D41370
llvm-svn: 322141
This change adds `printMipsGOT` and `printMipsPLT` methods to the
`DumpStyle` class and overrides them in the `GNUStyle` and `LLVMStyle`
descendants. To pass information about GOT/PLT layout into these
methods, the `MipsGOTParser` class has been extended to hold all
necessary data.
llvm-svn: 321253
If a linked binary file contains a dynamic section, the GOT layout
defined by the dynamic section entries. In a statically linked file
the GOT is just a series of entries. This change teaches `llvm-readobj`
to print the GOT in that case. That provides a feature parity with GNU
`readelf`.
llvm-svn: 319616
Summary:
This change introduces a `DynamicSymbols` field to the ELF specific YAML
supported by `yaml2obj` and `obj2yaml`. This grouping of symbols provides a way
to represent ELF dynamic symbols. The `DynamicSymbols` structure is identical to
the existing `Symbols`.
Reviewers: compnerd, jakehehrlich, silvas
Reviewed By: silvas
Subscribers: silvas, jakehehrlich, llvm-commits
Differential Revision: https://reviews.llvm.org/D39582
llvm-svn: 318433
The Android relocation packing format is a more compact
format for dynamic relocations in executables and DSOs
that is based on delta encoding and SLEBs. An overview
of the format can be found in the Android source code:
https://android.googlesource.com/platform/bionic/+/refs/heads/master/tools/relocation_packer/src/delta_encoder.h
This patch implements relocation packing using that format.
This implementation uses a more intelligent algorithm for compressing
relative relocations than Android's own relocation packer. As a
result it can generally create smaller relocation sections than
that packer. If I link Chromium for Android targeting ARM32 I get a
.rel.dyn of size 174693 bytes, as compared to 371832 bytes with gold
and the Android packer.
Differential Revision: https://reviews.llvm.org/D39152
llvm-svn: 316775
This is in preparation for testing lld's upcoming relocation packing
feature (D39152). I have verified that this implementation correctly
unpacks the relocations from a Chromium DSO built with gold and the
Android relocation packer for ARM32 and ARM64.
Differential Revision: https://reviews.llvm.org/D39272
llvm-svn: 316543
readelf tool reports an error when output contains the same section
in multiple COMDAT groups. That can be useful.
Path teaches llvm-readobj to do the same.
Differential revision: https://reviews.llvm.org/D37567
llvm-svn: 313459
With fix in formatting for GNU style output.
Original commit message:
This refactors GNUStyle<ELFT>::printGroupSections and
LLVMStyle<ELFT>::printGroupSections to split out all
duplicated code.
After the change these methods just prints the data provided
by introduced getGroups in a corresponding LLVM/GNU format.
Differential revision: https://reviews.llvm.org/D37621
llvm-svn: 313236
This refactors GNUStyle<ELFT>::printGroupSections and
LLVMStyle<ELFT>::printGroupSections to split out all
duplicated code.
After the change these methods just prints the data provided
by introduced getGroups in a corresponding LLVM/GNU format.
Differential revision: https://reviews.llvm.org/D37621
llvm-svn: 313234
Nothing special here, output format is similar to the format
used by binutils readelf and ELF Tool Chain readelf.
Differential revision: https://reviews.llvm.org/D35351
llvm-svn: 308033
This is motivated by https://reviews.llvm.org/D32488 where I am trying
to add printing of the section type for incompatible sections to LLD
error messages. This patch allows us to use the same code in
llvm-readobj and LLD instead of duplicating the function inside LLD.
Patch by Alexander Richardson!
llvm-svn: 301921
Note payloads are padded to a multiple of 4 bytes in size, but the size
of the string that should be print can be smaller e.g. the n_descsz
field in gold's version note is 9, so that's the whole size of the
string that should be printed. The padding is part of the format of a
SHT_NOTE section or PT_NOTE segment, but it's not part of the note
itself.
Printing the extra null bytes may confuse some tools, e.g. when the
llvm-readobj is sent to grep, it treats the output as binary because
it contains a null byte.
Differential Revision: https://reviews.llvm.org/D30804
llvm-svn: 299576
- Rename runtime metadata -> code object metadata
- Make metadata not flow
- Switch enums to use ScalarEnumerationTraits
- Cleanup and move AMDGPUCodeObjectMetadata.h to AMDGPU/MCTargetDesc
- Introduce in-memory representation for attributes
- Code object metadata streamer
- Create metadata for isa and printf during EmitStartOfAsmFile
- Create metadata for kernel during EmitFunctionBodyStart
- Finalize and emit metadata to .note during EmitEndOfAsmFile
- Other minor improvements/bug fixes
Differential Revision: https://reviews.llvm.org/D29948
llvm-svn: 298552
Enable an ELFObjectFile to read the its arm build attributes to
produce a target triple with a specific ARM architecture.
llvm-objdump now uses this functionality to automatically produce
a more accurate target.
Differential Revision: https://reviews.llvm.org/D28769
llvm-svn: 292366
Summary:
Revert [ARM] Fix ubig32_t read in ARMAttributeParser
Now using support functions to read data instead of trying to
perform casts.
===========================================================
Revert [ARM] Enable objdump to construct triple for ARM
Now that The ARMAttributeParser has been moved into the library,
it has been modified so that it can parse the attributes without
printing them and stores them in a map. ELFObjectFile now queries
the attributes to fill out the architecture details of a provided
triple for 'arm' and 'thumb' targets. llvm-objdump uses this new
functionality.
Subscribers: llvm-commits, samparker, aemerson, mgorny
Differential Revision: https://reviews.llvm.org/D28683
llvm-svn: 291911
Now that The ARMAttributeParser has been moved into the library,
it has been modified so that it can parse the attributes without
printing them and stores them in a map. ELFObjectFile now queries
the attributes to fill out the architecture details of a provided
triple for 'arm' and 'thumb' targets. llvm-objdump uses this new
functionality.
Differential Revision: https://reviews.llvm.org/D28281
llvm-svn: 291898
This implements execute-only support for ARM code generation, which
prevents the compiler from generating data accesses to code sections.
The following changes are involved:
* Add the CodeGen option "-arm-execute-only" to the ARM code generator.
* Add the clang flag "-mexecute-only" as well as the GCC-compatible
alias "-mpure-code" to enable this option.
* When enabled, literal pools are replaced with MOVW/MOVT instructions,
with VMOV used in addition for floating-point literals. As the MOVT
instruction is required, execute-only support is only available in
Thumb mode for targets supporting ARMv8-M baseline or Thumb2.
* Jump tables are placed in data sections when in execute-only mode.
* The execute-only text section is assigned section ID 0, and is
marked as unreadable with the SHF_ARM_PURECODE flag with symbol 'y'.
This also overrides selection of ELF sections for globals.
llvm-svn: 289784
These are OpenBSD specific program headers.
OpenBSD commit:
d39116912b
It is required for fixing PR31288.
Differential revision: https://reviews.llvm.org/D27456
llvm-svn: 288831
-symbols prints both .symtab and .dynsym symbols for GNU style in ELF.
-dyn-symbols prints symbols looking up through hash tables. This helps validate hash tables.
llvm-svn: 287786
llvm-readobj.
Another bug caught by PVS-Studio.
It'd be nice to actually have a test for this, but I found it by
inspection from PVS-Studio.
llvm-svn: 285937
Add the necessary definitions for RISC-V ELF files, including relocs. Also
make necessary trivial change to ELFYaml, llvm-objdump, and llvm-readobj in
order to work with RISC-V ELFs.
Differential Revision: https://reviews.llvm.org/D23557
llvm-svn: 285708
Summary:
It was previously not possible for tools to use solely the stackmap
information emitted to reconstruct the return addresses of callsites in
the map, which is necessary to use the information to walk a stack. This
patch adds per-function callsite counts when emitting the stackmap
section in order to resolve the problem. Note that this slightly alters
the stackmap format, so external tools parsing these maps will need to
be updated.
**Problem Details:**
Records only store their offset from the beginning of the function they
belong to. While these records and the functions are output in program
order, it is not possible to determine where the end of one function's
records are without the callsite count when processing the records to
compute return addresses.
Patch by Kavon Farvardin!
Reviewers: atrick, ributzka, sanjoy
Subscribers: nemanjai
Differential Revision: https://reviews.llvm.org/D23487
llvm-svn: 281532
Add support for printing the GNU Notes. This allows an easy way to view the
build id for a binary built with the build id. Currently, this only handles the
GNU notes, though it would be easy to extend for other note types (default,
FreeBSD, NetBSD, etc). Only the GNU style is supported currently.
llvm-svn: 280131
This is a mechanical change of comments in switches like fallthrough,
fall-through, or fall-thru to use the LLVM_FALLTHROUGH macro instead.
llvm-svn: 278902
The same value for EM_BPF is being propagated to glibc,
elfutils, and binutils.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
llvm-svn: 275633
This patch changes single method of llvm-readobj.
It teaches SHT_GNU_verdef dumper to print version dependencies,
also it removes few fields from output that can be dumped with other keys
and slightly refactors code.
Testcase was also modified to match the changes.
Change is required for testcases of upcoming lld patches.
Differential revision: http://reviews.llvm.org/D21552
llvm-svn: 273417
SHT_GNU_verneed (.gnu.version_r) is a version dependency section.
It was the last symbol versioning relative section that was not dumped,
now it is.
Differential revision: http://reviews.llvm.org/D21024
llvm-svn: 271998
Main problem here was that SHF_COMPRESSED has the same value with
XCORE_SHF_CP_SECTION, which was included as standart (common) flag.
As far I understand xCore is a family of controllers and it that
means it's constant should be processed separately,
only if e_machine == EM_XCORE, otherwise llvm-readobj would output
different constants twice for compressed section:
Flags [
..
SHF_COMPRESSED (0x800)
..
XCORE_SHF_CP_SECTION (0x800)
..
]
what probably does not make sence if you're not working with xcore file.
Differential revision: http://reviews.llvm.org/D20273
llvm-svn: 270320
.MIPS.options section specifies miscellaneous options to be applied
to an object file. LLVM as well as modern versions of GNU tools emit
the only type of the options - ODK_REGINFO. The patch teaches llvm-readobj
to print details of the ODK_REGINFO and skip contents of other options.
llvm-svn: 268478
We wish to re-use this from llvm-pdbdump, and it provides a nice
way to print structured data in scoped format that could prove
useful for many other dumping tools as well. Moving to support
and changing name to ScopedPrinter to better reflect its purpose.
llvm-svn: 268342
The patch supports common STV_xxx visibility flags and MIPS specific
STO_MIPS_xxx flags.
Differential Revision: http://reviews.llvm.org/D18447
llvm-svn: 264300
The dynamic table is also an array of a fixed structure, so it can be
represented with a DynReginoInfo.
No major functionality change. The extra error checking is covered by
existing tests with a broken dynamic program header.
Idea extracted from r260488. I did the extra cleanups.
llvm-svn: 261107
We used to keep both a section and a pointer to the first symbol.
The oddity of keeping a section for dynamic symbols is because there is
a DT_SYMTAB but no DT_SYMTABZ, so to print the table we have to find the
size via a section table.
The reason for still keeping a pointer to the first symbol is because we
want to be able to print relocation tables even if the section table is
missing (it is mandatory only for files used in linking).
With this patch we keep just a DynRegionInfo. This then requires
changing a few places that were asking for a Elf_Shdr but actually just
needed the first symbol.
The test change is to delete the program header pointer.
Now that we use the information of both DT_SYMTAB and .dynsym, we don't
depend on the sh_entsize of .dynsym if we see DT_SYMTAB.
Note: It is questionable if it is worth it putting the effort to report
broken sh_entsize given that in files with no section table we have to
assume it is sizeof(Elf_Sym), but that is for another change.
Extracted from r260488.
llvm-svn: 261099
Original commit message:
[readobj] Dump DT_JMPREL relocations when outputting dynamic relocations.
The bits of r260488 it depends on have been committed.
llvm-svn: 260970
This requires making an error message a bit more generic, but that seems
a reasonable tradeoff.
Extracted from r260488 but simplified a bit.
llvm-svn: 260967
Original messages:
Revert "[readobj] Handle ELF files with no section table or with no program headers."
Revert "[readobj] Dump DT_JMPREL relocations when outputting dynamic relocations."
r260489 depends on r260488 and among other issues r260488 deleted error
handling code.
llvm-svn: 260962
This adds support for finding the dynamic table and dynamic symbol table via
the section table or the program header table. If there's no section table an
attempt is made to figure out the length of the dynamic symbol table.
llvm-svn: 260488
New option --elf-output-style=LLVM or GNU
Enables -file-headers in readelf style when elf-output-style=GNU
Differential revision: http://reviews.llvm.org/D14128
llvm-svn: 260430
New option --elf-output-style=LLVM or GNU
Enables -file-headers in readelf style when elf-output-style=GNU
Differential revision: http://reviews.llvm.org/D14128
llvm-svn: 260391
It is possible to have .got section and one or more zero-sized section
at the same address. This patch first checks that GOT (or GOT PLT)
section should have non-zero size using corresponding dynamic tags. Then
it looks up not empty section at the specified address.
Differential Revision: http://reviews.llvm.org/D16968
llvm-svn: 260245
Adds a way to inspect SHT_GROUP sections in ELF objects.
Displays signature, member sections of these sections.
Differential revision: http://reviews.llvm.org/D16555
llvm-svn: 258845
Some architecture specific ELF section flags might have the same value
(for example SHF_X86_64_LARGE and SHF_HEX_GPREL) and we have to check
machine architectures to select an appropriate set of possible flags.
The patch selects architecture specific flags into separate arrays
`ElfxxxSectionFlags` and combines `ElfSectionFlags` and `ElfxxxSectionFlags`
before pass to the `StreamWriter::printFlags()` method.
Differential Revision: http://reviews.llvm.org/D16269
llvm-svn: 258334
MIPS 32-bit ABI uses REL relocation record format to save dynamic
relocations. The patch teaches llvm-readobj to show dynamic relocations
in this format.
Differential Revision: http://reviews.llvm.org/D16114
llvm-svn: 258001
