Summary:
Note: This revision is very similar to D62296.
In D75756, we need `getDynamicSymbolIterators()` to skip first NULL symbol in `.dynsym`. And I believe it might be worth pointing this out in a separate patch to gather you experts' opinions.
I have checked that current code base will not be affected by this change.
```
dynamic_symbol_begin()
|- dynamic_symbol_end(): Ok
`- getDynamicSymbolIterators()
|- addDynamicElfSymbols(): llvm/tools/llvm-objdump/llvm-objdump.cpp, Line 934
| Ok, NULL symbol will be omitted by Line 945-947
| StringRef Name = unwrapOrError(Symbol.getName(), Obj->getName());
| if (Name.empty()) continue;
|- dumpSymbolNameFromObject(): llvm/tools/llvm-nm/llvm-nm.cpp, Line 1192
| There's no test for dumping dynamic debugging symbol. This patch helps improve llvm-nm behavior. (we should add test for this later)
`- computeSymbolSizes(): llvm/lib/Object/SymbolSize.cpp, Line 52
|- OProfileJITEventListener::notifyObjectLoaded(): llvm/lib/ExecutionEngine/OProfileJIT/OProfileJITEventListener.cpp, Line 92
| Ok, NULL symbol will be omitted by Line 94-95
| if (!Sym.getType() || *Sym.getType() != SF_Function) continue;
|- IntelJITEventListener::notifyObjectLoaded(): llvm/lib/ExecutionEngine/IntelJITEvents/IntelJITEventListener.cpp, Line 98
| Ok, NULL symbol will be omitted by Line 124-126 (same as previous one)
|- PerfJITEventListener::notifyObjectLoaded(): llvm/lib/ExecutionEngine/PerfJITEvents/PerfJITEventListener.cpp, Line 244
| Ok, NULL symbol will be omitted by Line 254-256, (same as previous one)
|- SymbolizableObjectFile::create(): llvm/lib/DebugInfo/Symbolize/SymbolizableObjectFile.cpp, Line 73
| Ok, NULL symbol will be omitted by Line 75
| res->addSymbol()
| In addSymbol(), Line 167-168
| if (!Sec || (Obj && Obj->section_end() == *Sec)) return std::error_code();
|- dumpCXXData(): llvm/tools/llvm-cxxdump/llvm-cxxdump.cpp, Line 189
| Ok, NULL symbol will be omitted by Line 199-202
| object::section_iterator SecI = *SecIOrErr;
| // Skip external symbols.
| if (SecI == Obj->section_end())
| continue;
`- printLineInfoForInput(): llvm/tools/llvm-rtdyld/llvm-rtdyld.cpp, Line 418
Ok, NULL symbol will be omitted by Line 430-477
if (Type == object::SymbolRef::ST_Function) {
...
}
```
Reviewers: grimar, jhenderson, MaskRay
Reviewed By: jhenderson, MaskRay
Subscribers: rupprecht, arphaman, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D76081
Different file formats have different naming style for the debug
sections. The method is implemented for ELF, COFF and Mach-O formats.
Differential Revision: https://reviews.llvm.org/D76276
Leverage ARM ELF build attribute section to create ELF attribute section
for RISC-V. Extract the common part of parsing logic for this section
into ELFAttributeParser.[cpp|h] and ELFAttributes.[cpp|h].
Differential Revision: https://reviews.llvm.org/D74023
Follow-up for D74433
What the function returns are almost standard BFD names, except that "ELF" is
in uppercase instead of lowercase.
This patch changes "ELF" to "elf" and changes ARM/AArch64 to use their BFD names.
MIPS and PPC64 have endianness differences as well, but this patch does not intend to address them.
Advantages:
* llvm-objdump: the "file format " line matches GNU objdump on ARM/AArch64 objects
* "file format " line can be extracted and fed into llvm-objcopy -O literally.
(https://github.com/ClangBuiltLinux/linux/issues/779 has such a use case)
Affected tools: llvm-readobj, llvm-objdump, llvm-dwarfdump, MCJIT (internal implementation detail, not exposed)
Reviewed By: jhenderson
Differential Revision: https://reviews.llvm.org/D76046
* Delete boilerplate
* Change functions to return `Error`
* Test parsing errors
* Update callers of ARMAttributeParser::parse() to check the `Error` return value.
Since this patch touches nearly everything in the file, I apply
http://llvm.org/docs/Proposals/VariableNames.html and change variable
names to lower case.
Reviewed By: compnerd
Differential Revision: https://reviews.llvm.org/D75015
llvm-objdump -D this file:
int a[100000];
int main() { return 0; }
Will produce an error: "The end of the file was unexpectedly encountered".
This happens because of a check in Binary.h checkOffset. (Addr + Size > M.getBufferEnd()).
The sh_offset and sh_size fields can be ignored for SHT_NOBITS sections.
Fix the error by changing ELFObjectFile<ELFT>::getSectionContents to use
the file base for SHT_NOBITS sections.
Reviewed By: grimar, MaskRay
Differential Revision: https://reviews.llvm.org/D69192
It returns just a section_iterator currently and have a report_fatal_error call inside.
This change adds a way to return errors and handle them on caller sides.
The patch also changes/improves current users and adds test cases.
Differential revision: https://reviews.llvm.org/D69167
llvm-svn: 375408
It's a straightforward refactoring that allows to simplify and encapsulate the code.
Differential revision: https://reviews.llvm.org/D67624
llvm-svn: 372083
Changes: no changes. A fix for the clang code will be landed right on top.
Original commit message:
SectionRef::getName() returns std::error_code now.
Returning Expected<> instead has multiple benefits.
For example, it forces user to check the error returned.
Also Expected<> may keep a valuable string error message,
what is more useful than having a error code.
(Object\invalid.test was updated to show the new messages printed.)
This patch makes a change for all users to switch to Expected<> version.
Note: in a few places the error returned was ignored before my changes.
In such places I left them ignored. My intention was to convert the interface
used, and not to improve and/or the existent users in this patch.
(Though I think this is good idea for a follow-ups to revisit such places
and either remove consumeError calls or comment each of them to clarify why
it is OK to have them).
Differential revision: https://reviews.llvm.org/D66089
llvm-svn: 368826
SectionRef::getName() returns std::error_code now.
Returning Expected<> instead has multiple benefits.
For example, it forces user to check the error returned.
Also Expected<> may keep a valuable string error message,
what is more useful than having a error code.
(Object\invalid.test was updated to show the new messages printed.)
This patch makes a change for all users to switch to Expected<> version.
Note: in a few places the error returned was ignored before my changes.
In such places I left them ignored. My intention was to convert the interface
used, and not to improve and/or the existent users in this patch.
(Though I think this is good idea for a follow-ups to revisit such places
and either remove consumeError calls or comment each of them to clarify why
it is OK to have them).
Differential revision: https://reviews.llvm.org/D66089
llvm-svn: 368812
For type values that do not have proper names, print reasonable representation
in llvm-nm, llvm-readobj and llvm-readelf, matching GNU tools.s
Fixes PR41713.
Differential Revision: https://reviews.llvm.org/D65537
llvm-svn: 368451
The ARMDisassembler changes allow changing between ARM and Thumb mode
based on the MCSubtargetInfo, rather than the Target, which simplifies
the other changes a bit.
I'm not really happy with adding more target-specific logic to
tools/llvm-objdump/, but there isn't any easy way around it: the logic
in question specifically applies to disassembling an object file, and
that code simply isn't located in lib/Target, at least at the moment.
Differential Revision: https://reviews.llvm.org/D60927
llvm-svn: 363903
The ELF gABI requires the tag values of DT_REL, DT_RELA and DT_JMPREL to be
treated as virtual addresses. They were treated as offsets. Fixes PR41832.
Differential Revision: https://reviews.llvm.org/D62972
llvm-svn: 362969
This is how multi-partition combined output files are going to look. If we
see multiple sections, the tools will just read the first one.
Differential Revision: https://reviews.llvm.org/D62349
llvm-svn: 361869
Summary:
https://bugs.llvm.org/show_bug.cgi?id=41353
I'm new to LLVM and C++ so please do not hesitate to iterate with me on this fix.
Patch by Mike Pozulp!
Reviewers: rupprecht, zbrid, grimar, jhenderson
Reviewed By: rupprecht, jhenderson
Subscribers: jhenderson, chrisjackson, MaskRay, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D61117
llvm-svn: 361595
For clients iterating the symbol table, none expects to handle index 0
(STN_UNDEF). Skip it to improve consistency with other binary formats.
Clients that need STN_UNDEF (e.g. lld) can use
getSectionContentsAsArray(). A test will be added in D62148.
Reviewed By: mtrent
Differential Revision: https://reviews.llvm.org/D62296
llvm-svn: 361506
Change
std::error_code getSectionContents(DataRefImpl, StringRef &) const;
to
Expected<ArrayRef<uint8_t>> getSectionContents(DataRefImpl) const;
Many object formats use ArrayRef<uint8_t> as the underlying type, which
is generally better than StringRef to represent binary data, so change
the type to decrease the number of type conversions.
Reviewed By: ruiu, sbc100
Differential Revision: https://reviews.llvm.org/D61781
llvm-svn: 360648
Summary:
It currently receives an output parameter and returns
std::error_code. Expected<StringRef> fits for this purpose perfectly.
Differential Revision: https://reviews.llvm.org/D61421
llvm-svn: 359774
Specifically, compute and Print Type and Section columns.
This is a re-commit of rL354833, after fixing the Asan problem found a a buildbot.
Differential Revision: https://reviews.llvm.org/D59060
llvm-svn: 355742
Summary:
Previously, llvm-nm would report symbols for .debug and .note sections as: '?' with an empty section name:
```
00000000 ?
00000000 ?
...
```
With this patch the output more closely resembles GNU nm:
```
00000000 N .debug_abbrev
00000000 n .note.GNU-stack
...
```
This patch calls `getSectionName` for sections that belong to symbols of type `ELF::STT_SECTION`, which returns the name of the section from the section string table.
Reviewers: Bigcheese, davide, jhenderson
Reviewed By: davide, jhenderson
Subscribers: rupprecht, jhenderson, llvm-commits
Differential Revision: https://reviews.llvm.org/D57105
llvm-svn: 352785
to reflect the new license.
We understand that people may be surprised that we're moving the header
entirely to discuss the new license. We checked this carefully with the
Foundation's lawyer and we believe this is the correct approach.
Essentially, all code in the project is now made available by the LLVM
project under our new license, so you will see that the license headers
include that license only. Some of our contributors have contributed
code under our old license, and accordingly, we have retained a copy of
our old license notice in the top-level files in each project and
repository.
llvm-svn: 351636
Summary:
llvm-size uses "isText()" etc. which seem to indicate whether the section contains code-like things, not whether or not it will actually go in the text segment when in a fully linked executable.
The unit test added (elf-sizes.test) shows some types of sections that cause discrepencies versus the GNU size tool. llvm-size is not correctly reporting sizes of things mapping to text/data segments, at least for ELF files.
This fixes pr38723.
Reviewers: echristo, Bigcheese, MaskRay
Reviewed By: MaskRay
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D54369
llvm-svn: 349074
All of STB_GLOBAL/STB_WEAK/STB_GNU_UNIQUE are treated as export symbols, see:
glibc/elf/dl-lookup.c:do_lookup_x
musl/ldso/dynlink.c OK_BINDS
Though ld.so does not read binding, the currently used STV_DEFAULT or STV_PROTECTED is a good emulation of linker behavior.
llvm-svn: 347481
Reapply r346374 with the fixes for modules build.
Original summary:
This change implements assembler parser, code emitter, ELF object writer
and disassembler for the MSP430 ISA. Also, more instruction forms are added
to the target description.
Patch by Michael Skvortsov!
llvm-svn: 346948
Summary:
This change implements assembler parser, code emitter, ELF object writer
and disassembler for the MSP430 ISA. Also, more instruction forms are added
to the target description.
Reviewers: asl
Reviewed By: asl
Subscribers: pftbest, krisb, mgorny, llvm-commits
Differential Revision: https://reviews.llvm.org/D53661
llvm-svn: 346374
This adds a new method to ELFObjectFileBase that returns the symbols and addresses of PLT entries.
This design was suggested by pcc and eugenis in https://reviews.llvm.org/D49383.
Differential Revision: https://reviews.llvm.org/D50203
llvm-svn: 340610
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
Summary:
This affects what sections are displayed as "DATA" in llvm-objdump.
The other user llvm-size is unaffected.
Before, a "TEXT" section is also "DATA", which seems weird.
The sh_flags condition matches that of bfd's SEC_DATA but the sh_type
condition uses (== SHF_PROGBITS) instead of bfd's (!= SHT_NOBITS).
bfd's SEC_DATA is not appealing as so many sections will be shown as DATA.
Reviewers: jyknight, Bigcheese
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D48472
llvm-svn: 335405
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
llvm-objdump could get C feature by ELF::EF_RISCV_RVC e_flag,
so then we don't have to add -mattr=+c on the command line.
Differential Revision: https://reviews.llvm.org/D42629
llvm-svn: 324058
Most of the -Wsign-compare warnings are due to the fact that
enums are signed by default in the MS ABI, while the
tautological comparison warnings trigger on x86 builds where
sizeof(size_t) is 4 bytes, so N > numeric_limits<unsigned>::max()
is always false.
Differential Revision: https://reviews.llvm.org/D41256
llvm-svn: 320750
