| Commit message (Collapse) | Author | Age | Files | Lines |
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Note: this is a reland with a trivial 2 lines fix in ELFState<ELFT>::writeSectionContent.
It adds a check similar to ones we already have for other sections to fix the case revealed
by bots, like http://lab.llvm.org:8011/builders/llvm-clang-lld-x86_64-scei-ps4-ubuntu-fast/builds/60744.
The encoded sequence of Elf*_Relr entries in a SHT_RELR section looks
like [ AAAAAAAA BBBBBBB1 BBBBBBB1 ... AAAAAAAA BBBBBB1 ... ]
i.e. start with an address, followed by any number of bitmaps. The address
entry encodes 1 relocation. The subsequent bitmap entries encode up to 63(31)
relocations each, at subsequent offsets following the last address entry.
More information is here:
https://github.com/llvm-mirror/llvm/blob/master/lib/Object/ELF.cpp#L272
This patch adds a support for these sections.
Differential revision: https://reviews.llvm.org/D71872
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This reverts commit 46d11e30ee807accefd14e0b7f306647963a39b5.
It broke bots. E.g. http://lab.llvm.org:8011/builders/llvm-clang-lld-x86_64-scei-ps4-ubuntu-fast/builds/60744
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The encoded sequence of Elf*_Relr entries in a SHT_RELR section looks
like [ AAAAAAAA BBBBBBB1 BBBBBBB1 ... AAAAAAAA BBBBBB1 ... ]
i.e. start with an address, followed by any number of bitmaps. The address
entry encodes 1 relocation. The subsequent bitmap entries encode up to 63(31)
relocations each, at subsequent offsets following the last address entry.
More information is here:
https://github.com/llvm-mirror/llvm/blob/master/lib/Object/ELF.cpp#L272
This patch adds a support for these sections.
Differential revision: https://reviews.llvm.org/D71872
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We already have Symbols property to list regular symbols and
it is currently Optional<>. This patch makes DynamicSymbols to be optional
too. With this there is no need to define a dummy symbol anymore to trigger
creation of the .dynsym and it is now possible to define an empty .dynsym using
just the following line:
DynamicSymbols: []
(it is important to have when you do not want to have dynamic symbols,
but want to have a .dynsym)
Now the code is consistent and it helped to fix a bug: previously we
did not report an error when both Content/Size and an empty
Symbols/DynamicSymbols list were specified.
Differential revision: https://reviews.llvm.org/D70956
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with "Content".
There is no way to set raw content for SHT_GNU_verneed section.
This patch implements it.
Differential revision: https://reviews.llvm.org/D70816
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property.
There is no way to set raw content for SHT_GNU_verdef section.
This patch implements it.
Differential revision: https://reviews.llvm.org/D70710
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This section contains strings specifying libraries to be added to the link by the linker.
The strings are encoded as standard null-terminated UTF-8 strings.
This patch adds a way to describe and dump SHT_LLVM_DEPENDENT_LIBRARIES sections.
I introduced a new YAMLFlowString type here. That used to teach obj2yaml to dump
them like:
```
Libraries: [ foo, bar ]
```
instead of the following (if StringRef would be used):
```
Libraries:
- foo
- bar
```
Differential revision: https://reviews.llvm.org/D70598
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SHT_LLVM_LINKER_OPTIONS section contains pairs of null-terminated strings.
This patch adds support for them.
Differential revision: https://reviews.llvm.org/D69895
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output section.
Currently there is no way to describe the data that is not a part of an output section.
It can be a data used to align sections or to fill the gaps with something,
or another kind of custom data. In this patch I suggest a way to describe it. It looks like that:
```
Sections:
- Type: CustomFiller
Pattern: "CCDD"
Size: 4
- Name: .bar
Type: SHT_PROGBITS
Content: "FF"
```
I.e. I've added a kind of synthetic section with a synthetic type "CustomFiller".
In the code it is called a "SyntheticFiller", which is "a synthetic section which
might be used to write the custom data around regular output sections. It does
not present in the sections header table, but it might affect the output file size and
program headers produced. Think about it as about piece of data."
`SyntheticFiller` currently has a `Pattern` field and a `Size` field + an optional `Name`.
When written, `Size` of bytes in the output will be filled with a `Pattern`.
It is possible to reference a named filler it by name from the program headers description,
just like any other normal section.
Differential revision: https://reviews.llvm.org/D69709
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This adds parsing and dumping support for GNU hash sections.
They are described nicely here: https://blogs.oracle.com/solaris/gnu-hash-elf-sections-v2
Differential revision: https://reviews.llvm.org/D69399
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SHT_NOTE is the section that consists of
namesz, descsz, type, name + padding, desc + padding data.
This patch teaches yaml2obj, obj2yaml to dump and parse them.
This patch implements the section how it is described here:
https://docs.oracle.com/cd/E23824_01/html/819-0690/chapter6-18048.html
Which says: "For 64–bit objects and 32–bit objects, each entry is an array of 4-byte words in
the format of the target processor"
The official specification is different
http://www.sco.com/developers/gabi/latest/ch5.pheader.html#note_section
And says: "n 64-bit objects (files with e_ident[EI_CLASS] equal to ELFCLASS64), each entry is an array
of 8-byte words in the format of the target processor. In 32-bit objects (files with e_ident[EI_CLASS]
equal to ELFCLASS32), each entry is an array of 4-byte words in the format of the target processor"
Since LLVM uses the first, 32-bit way, this patch follows it.
Differential revision: https://reviews.llvm.org/D68983
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This just reorders the code and removes an assignment
of an empty string for the case when a relocation has
no symbol associated. With this our output becomes
cleaner and shorter.
Differential revision: https://reviews.llvm.org/D69255
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This patch tries to resolve problems faced in D68943
and uses some of the code written by Konrad Wilhelm Kleine
in that patch.
Previously, yaml2obj tool always created a .symtab section.
This patch changes that. With it we only create it when
have a "Symbols:" tag in the YAML document or when
we need to create it because it is used by another section(s).
obj2yaml follows the new behavior and does not print "Symbols:"
anymore when there is no symbol table.
Differential revision: https://reviews.llvm.org/D69041
llvm-svn: 375361
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sections."
Fix: call `consumeError()` for a case missed.
Original commit message:
SHT_LLVM_ADDRSIG is described here:
https://llvm.org/docs/Extensions.html#sht-llvm-addrsig-section-address-significance-table
This patch teaches tools to dump them and to parse the YAML declarations of such sections.
Differential revision: https://reviews.llvm.org/D68333
llvm-svn: 373606
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sections."
It broke BB:
http://lab.llvm.org:8011/builders/clang-x86_64-debian-fast/builds/18655/steps/test/logs/stdio
llvm-svn: 373599
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SHT_LLVM_ADDRSIG is described here:
https://llvm.org/docs/Extensions.html#sht-llvm-addrsig-section-address-significance-table
This patch teaches tools to dump them and to parse the YAML declarations of such sections.
Differential revision: https://reviews.llvm.org/D68333
llvm-svn: 373598
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The success return value for data extractor's cursor
should also be checked.
llvm-svn: 373319
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SHT_HASH specification is:
http://www.sco.com/developers/gabi/latest/ch5.dynamic.html#hash
In short the format is the following: it has 2 uint32 fields
in its header: nbucket and nchain followed by (nbucket + nchain)
uint32 values.
This patch allows dumping and parsing such sections.
Differential revision: https://reviews.llvm.org/D68085
llvm-svn: 373315
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.stack_sizes is a SHT_PROGBITS section that contains pairs of
<address (4/8 bytes), stack size (uleb128)>.
This patch teach tools to parse and dump it.
Differential revision: https://reviews.llvm.org/D67757
llvm-svn: 372762
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`struct Elf*_Shdr` has a field `sh_offset`, named `ShOffset` in
llvm::ELFYAML::Section. Rename SHOffset (e_shoff) to SHOff to prevent confusion.
Reviewed By: grimar
Differential Revision: https://reviews.llvm.org/D67254
llvm-svn: 371185
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Now that we've moved to C++14, we no longer need the llvm::make_unique
implementation from STLExtras.h. This patch is a mechanical replacement
of (hopefully) all the llvm::make_unique instances across the monorepo.
llvm-svn: 369013
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In some cases a symbol might have section index == SHN_XINDEX.
This is an escape value indicating that the actual section header index
is too large to fit in the containing field.
Then the SHT_SYMTAB_SHNDX section is used. It contains the 32bit values
that stores section indexes.
ELF gABI says that there can be multiple SHT_SYMTAB_SHNDX sections,
i.e. for example one for .symtab and one for .dynsym
(1) https://groups.google.com/forum/#!topic/generic-abi/-XJAV5d8PRg
(2) DT_SYMTAB_SHNDX: http://www.sco.com/developers/gabi/latest/ch5.dynamic.html
In this patch I am only supporting a single SHT_SYMTAB_SHNDX associated
with a .symtab. This is a more or less common case which is used a few tests I saw in LLVM.
I decided not to create the SHT_SYMTAB_SHNDX section as "implicit",
but implement is like a kind of regular section for now.
i.e. tools do not recreate this section or its content, like they do for
symbol table sections, for example. That should allow to write all kind of
possible broken test cases for our needs and keep the output closer to requested.
Differential revision: https://reviews.llvm.org/D65446
llvm-svn: 368272
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Recently an advanced support of SHT_NULL sections
was implemented in yaml2obj.
This patch adds a corresponding support to obj2yaml.
Differential revision: https://reviews.llvm.org/D65215
llvm-svn: 367852
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Because of a bug we did not report a error in the case
shown in the test. With this patch we do.
Differential revision: https://reviews.llvm.org/D65214
llvm-svn: 367203
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target."
No changes, LLD code was updated in r366057.
Original commit message:
ELF.h contains two getSymbol methods
which seems to be used only from obj2yaml.
One of these methods calls another, which in turn
contains untested error message which doesn't
provide enough information.
Problem is that after improving only just that message,
obj2yaml will not show it,
("Error reading file: yaml: Invalid data was
encountered while parsing the file" message will be shown instead),
because internal errors handling of tool is based on ErrorOr<> class which
stores a error code and as a result can only show a predefined error string, what
actually isn't very useful.
In this patch, I rework obj2yaml's error reporting system
for ELF targets to use Error Expected<> classes.
Also, I improve the error message produced
by getSymbol for demonstration of the new functionality.
Differential revision: https://reviews.llvm.org/D64631
llvm-svn: 366058
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target."
Seems it broke LLD:
http://lab.llvm.org:8011/builders/sanitizer-windows/builds/48434
llvm-svn: 366053
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ELF.h contains two getSymbol methods
which seems to be used only from obj2yaml.
One of these methods calls another, which in turn
contains untested error message which doesn't
provide enough information.
Problem is that after improving only just that message,
obj2yaml will not show it,
("Error reading file: yaml: Invalid data was
encountered while parsing the file" message will be shown instead),
because internal errors handling of tool is based on ErrorOr<> class which
stores a error code and as a result can only show a predefined error string, what
actually isn't very useful.
In this patch, I rework obj2yaml's error reporting system
for ELF targets to use Error Expected<> classes.
Also, I improve the error message produced
by getSymbol for demonstration of the new functionality.
Differential revision: https://reviews.llvm.org/D64631
llvm-svn: 366052
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Some of our test cases are using objects which
has sections with a broken sh_offset field.
There was no way to set it from YAML until this patch.
Differential revision: https://reviews.llvm.org/D63879
llvm-svn: 364898
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fields in the YAML.
This allows setting different values for e_shentsize, e_shoff, e_shnum
and e_shstrndx fields and is useful for producing broken inputs for various
test cases.
Differential revision: https://reviews.llvm.org/D63771
llvm-svn: 364517
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names.
The patch teaches yaml2obj/obj2yaml to support parsing/dumping
the sections and symbols with the same name.
A special suffix is added to a name to make it unique.
Differential revision: https://reviews.llvm.org/D63596
llvm-svn: 364282
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This allows to customize this field for "implicit" sections properly.
Differential revision: https://reviews.llvm.org/D63487
llvm-svn: 363777
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With this patch we get ability to set any flags we want
for implicit sections defined in YAML.
Differential revision: https://reviews.llvm.org/D63136
llvm-svn: 363367
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RawContentSection::Size optional
This is a follow-up for D62809.
Content and Size fields should be optional as was discussed in comments
of the D62809's thread. With that, we can describe a specific string table and
symbol table sections in a more correct way and also show appropriate errors.
The patch adds lots of test cases where the behavior is described in details.
Differential revision: https://reviews.llvm.org/D62957
llvm-svn: 362931
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bit. NFC.
This makes the variables naming to match LLVM style,
simplifies the code used to extract the group members,
simplifies the loop and reorders the code around a bit.
llvm-svn: 359101
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parsing/dumping.
Currently, YAML has the following syntax for describing the symbols:
Symbols:
Local:
LocalSymbol1:
...
LocalSymbol2:
...
...
Global:
GlobalSymbol1:
...
Weak:
...
GNUUnique:
I.e. symbols are grouped by their bindings. That is not very convenient,
because:
It does not allow to set a custom binding, what can be useful for producing
broken/special outputs for test cases. Adding a new binding would require to
change a syntax (what we observed when added GNUUnique recently).
It does not allow to change the order of the symbols in .symtab/.dynsym,
i.e. currently all Local symbols are placed first, then Global, Weak and GNUUnique
are following, but we are not able to change the order.
It is not consistent. Binding is just one of the properties of the symbol,
we do not group them by other properties.
It makes the code more complex that it can be. This patch shows it can be simplified
with the change performed.
The patch changes the syntax to just:
Symbols:
Symbol1:
...
Symbol2:
...
...
With that, we are able to work with the binding field just like with any other symbol property.
Differential revision: https://reviews.llvm.org/D60122
llvm-svn: 357595
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symbols.
yaml2obj/obj2yaml does not support the symbols with STB_GNU_UNIQUE yet.
Currently, obj2yaml fails with llvm_unreachable when met such a symbol.
I faced it when investigated the https://bugs.llvm.org/show_bug.cgi?id=41196.
Differential revision: https://reviews.llvm.org/D59875
llvm-svn: 357158
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This is for tweaking SHT_SYMTAB sections.
Their sh_info contains the (number of symbols + 1) usually.
But for creating invalid inputs for test cases it would be convenient
to allow explicitly override this field from YAML.
Differential revision: https://reviews.llvm.org/D58779
llvm-svn: 355193
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This fixes https://bugs.llvm.org/show_bug.cgi?id=40786
("obj2yaml symbol output missing section index for SHN_ABS and SHN_COMMON symbols")
Since SHN_ABS and SHN_COMMON symbols are special, we should preserve
the st_shndx for them. The patch does this for them and the other special symbols.
The test case is based on the test provided by James Henderson at the bug page!
Differential revision: https://reviews.llvm.org/D58498
llvm-svn: 354661
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This patch adds support for parsing/dumping the .gnu.version section.
Description of the section is: https://refspecs.linuxfoundation.org/LSB_1.3.0/gLSB/gLSB/symverdefs.html
Differential revision: https://reviews.llvm.org/D58437
llvm-svn: 354574
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This patch adds support for parsing dumping the .gnu.version section.
Description of the section is: https://refspecs.linuxfoundation.org/LSB_1.3.0/gLSB/gLSB/symversion.html#SYMVERTBL
Differential revision: https://reviews.llvm.org/D58280
llvm-svn: 354338
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parsing/dumping of the .gnu.version_r section."
Fix:
Replace
assert(!IO.getContext() && "The IO context is initialized already");
with
assert(IO.getContext() && "The IO context is not initialized");
(this was introduced in r354329, where I tried to quickfix the darwin BB
and seems copypasted the assert from the wrong place).
Original commit message:
The section is described here:
https://refspecs.linuxfoundation.org/LSB_1.3.0/gLSB/gLSB/symverrqmts.html
Patch just teaches obj2yaml/yaml2obj to dump and parse such sections.
We did the finalization of string tables very late,
and I had to move the logic to make it a bit earlier.
That was needed in this patch since .gnu.version_r adds strings to .dynstr.
This might also be useful for implementing other special sections.
Everything else changed in this patch seems to be straightforward.
Differential revision: https://reviews.llvm.org/D58119
llvm-svn: 354335
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parsing/dumping of the .gnu.version_r section."
Something went wrong. Bots are unhappy:
http://lab.llvm.org:8011/builders/llvm-clang-lld-x86_64-scei-ps4-ubuntu-fast/builds/44113/steps/test/logs/stdio
llvm-svn: 354332
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section.
The section is described here:
https://refspecs.linuxfoundation.org/LSB_1.3.0/gLSB/gLSB/symverrqmts.html
Patch just teaches obj2yaml/yaml2obj to dump and parse such sections.
We did the finalization of string tables very late,
and I had to move the logic to make it a bit earlier.
That was needed in this patch since .gnu.version_r adds strings to .dynstr.
This might also be useful for implementing other special sections.
Everything else changed in this patch seems to be straightforward.
Differential revision: https://reviews.llvm.org/D58119
llvm-svn: 354328
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ELFYAML.h contains a `Section` class which is a base for a few other
sections classes that are used for mapping different section types.
`Section` has a `StringRef Info` field used for storing sh_info.
At the same time, sh_info has very different meanings for sections and
cannot be processed in a similar way generally,
for example ELFDumper does not handle it in `dumpCommonSection`
but do that in `dumpGroup` and `dumpCommonRelocationSection` respectively.
At this moment, we have and handle it as a string, because that was possible for
the current use case. But also it can simply be a number:
For SHT_GNU_verdef is "The number of version definitions within the section."
The patch moves `Info` field out to be able to have it as a number.
With that change, each class will be able to decide what type and purpose
of the sh_info field it wants to use.
I also had to edit 2 test cases. This is because patch fixes a bug. Previously we
accepted yaml files with Info fields for all sections (for example, for SHT_DYNSYM too).
But we do not handle it and the resulting objects had zero sh_info fields set for
such sections. Now it is accepted only for sections that supports it.
Differential revision: https://reviews.llvm.org/D58054
llvm-svn: 353810
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This teaches the tools to parse and dump
the .dynamic section and its dynamic tags.
Differential revision: https://reviews.llvm.org/D57691
llvm-svn: 353606
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These methods are very similar, patch merge them into one.
Differential revision: https://reviews.llvm.org/D57461
llvm-svn: 352840
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I faced with the fact that obj2yaml does not dump the sh_entsize field.
A problem arose when I tried to dump ELF versioning sections.
This is close to what D50235 did, but D50235 did the change for yaml2obj, and now
I had to do the same for obj2yaml.
Differential revision: https://reviews.llvm.org/D57229
llvm-svn: 352373
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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
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These tools were assuming ABI version is 0,
that is not always true.
Patch teaches them to work with that field.
Differential revision: https://reviews.llvm.org/D55884
llvm-svn: 349737
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llvm-svn: 322346
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