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path: root/tools/yaml2obj/yaml2elf.cpp
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2017-11-16Add ELF dynamic symbol support to yaml2obj/obj2yamlDave Lee
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 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@318433 91177308-0d34-0410-b5e6-96231b3b80d8
2017-11-09Reapply: Allow yaml2obj to order implicit sections for ELFDave Lee
Summary: This change allows yaml input to control the order of implicitly added sections (`.symtab`, `.strtab`, `.shstrtab`). The order is controlled by adding a placeholder section of the given name to the Sections field. This change is to support changes in D39582, where it is desirable to control the location of the `.dynsym` section. This reapplied version fixes: 1. use of a function call within an assert 2. failing lld test which has an unnamed section 3. incorrect section count when given an unnamed section Additionally, one more test to cover the unnamed section failure. Reviewers: compnerd, jakehehrlich Reviewed By: jakehehrlich Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D39749 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@317789 91177308-0d34-0410-b5e6-96231b3b80d8
2017-11-08Revert "Reapply: Allow yaml2obj to order implicit sections for ELF"Dave Lee
This reverts commit r317646. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@317654 91177308-0d34-0410-b5e6-96231b3b80d8
2017-11-08Reapply: Allow yaml2obj to order implicit sections for ELFDave Lee
Summary: This change allows yaml input to control the order of implicitly added sections (`.symtab`, `.strtab`, `.shstrtab`). The order is controlled by adding a placeholder section of the given name to the Sections field. This change is to support changes in D39582, where it is desirable to control the location of the `.dynsym` section. This reapplied version fixes: 1. use of a function call within an assert 2. failing lld test which has an unnamed section Additionally, one more test to cover the unnamed section failure. Reviewers: compnerd, jakehehrlich Reviewed By: jakehehrlich Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D39749 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@317646 91177308-0d34-0410-b5e6-96231b3b80d8
2017-11-07Revert "Allow yaml2obj to order implicit sections for ELF"Dave Lee
Also, revert "Fix build bots after r317622" This reverts commit r317622, r317626. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@317630 91177308-0d34-0410-b5e6-96231b3b80d8
2017-11-07Fix build bots after r317622Dave Lee
Example build failure: http://lab.llvm.org:8011/builders/lld-x86_64-darwin13/builds/14660 TIL that the warning flags for local builds are loose compared to what build servers use. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@317626 91177308-0d34-0410-b5e6-96231b3b80d8
2017-11-07Allow yaml2obj to order implicit sections for ELFDave Lee
Summary: This change allows yaml input to control the order of implicitly added sections (`.symtab`, `.strtab`, `.shstrtab`). The order is controlled by adding a placeholder section of the given name to the Sections field. This change is to support changes in D39582, where it is desirable to control the location of the `.dynsym` section. Reviewers: compnerd, jakehehrlich Reviewed By: jakehehrlich Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D39749 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@317622 91177308-0d34-0410-b5e6-96231b3b80d8
2017-11-01[yaml2obj][ELF] Add support for setting alignment in program headersJake Ehrlich
Sometimes program headers have larger alignments than any of the sections they contain. Currently yaml2obj can't produce such files. A bug recently appeared in llvm-objcopy that failed in such a case. I'd like to be able to add tests to llvm-objcopy for such cases. This change adds an optional alignment parameter to program headers that will be used instead of calculating the alignment. Differential Revision: https://reviews.llvm.org/D39130 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@317139 91177308-0d34-0410-b5e6-96231b3b80d8
2017-09-07[yaml2obj][ELF] Add support for symbol indexes greater than SHN_LORESERVEPetr Hosek
Right now Symbols must be either undefined or defined in a specific section. Some symbols have section indexes like SHN_ABS however. This change adds support for outputting symbols that have such section indexes. Patch by Jake Ehrlich Differential Revision: https://reviews.llvm.org/D37391 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@312745 91177308-0d34-0410-b5e6-96231b3b80d8
2017-08-30[yaml2obj][ELF] Make symbols optional for relocationsPetr Hosek
Some kinds of relocations do not have symbols, like R_X86_64_RELATIVE for instance. I would like to test this case in D36554 but currently can't because symbols are required by yaml2obj. The other option is using the empty symbol but that doesn't seem quite right to me. This change makes the Symbol field of Relocation optional and in the case where the user does not specify a symbol name the Symbol index is 0. Patch by Jake Ehrlich Differential Revision: https://reviews.llvm.org/D37276 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@312192 91177308-0d34-0410-b5e6-96231b3b80d8
2017-07-19[yaml2obj][ELF] Add support for program headersPetr Hosek
This change adds basic support for program headers. I need to do some testing which requires generating program headers but I can't use ld.lld or clang to produce programs that have headers. I'd also like to test some strange things that those programs may never produce. Patch by Jake Ehrlich Differential Revision: https://reviews.llvm.org/D35276 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@308520 91177308-0d34-0410-b5e6-96231b3b80d8
2017-06-07Move Object format code to lib/BinaryFormat.Zachary Turner
This creates a new library called BinaryFormat that has all of the headers from llvm/Support containing structure and layout definitions for various types of binary formats like dwarf, coff, elf, etc as well as the code for identifying a file from its magic. Differential Revision: https://reviews.llvm.org/D33843 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@304864 91177308-0d34-0410-b5e6-96231b3b80d8
2016-10-04Misc improvements to StringTableBuilder.Rafael Espindola
This patch adds write methods to StringTableBuilder so that it is easier to change the underlying implementation. Using the write methods, avoid creating a temporary buffer when using mmaped output. It also uses a more compact key in the DenseMap. Overall this produces a slightly faster lld: firefox master 6.853419709 patch 6.841968912 1.00167361138x faster chromium master 4.297280174 patch 4.298712163 1.00033323147x slower chromium fast master 1.802335952 patch 1.806872459 1.00251701521x slower the gold plugin master 0.3247149 patch 0.321971644 1.00852017888x faster clang master 0.551279945 patch 0.543733194 1.01387951128x faster llvm-as master 0.032743458 patch 0.032143478 1.01866568391x faster the gold plugin fsds master 0.350814247 patch 0.348571741 1.00643341309x faster clang fsds master 0.6281672 patch 0.621130222 1.01132931187x faster llvm-as fsds master 0.030168899 patch 0.029797155 1.01247582194x faster scylla master 3.104222518 patch 3.059590248 1.01458766252x faster git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@283266 91177308-0d34-0410-b5e6-96231b3b80d8
2016-10-03Revert "Use getSize instead of data().size(). NFC."Rafael Espindola
This reverts commit r283125. lld needs to be updated. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@283127 91177308-0d34-0410-b5e6-96231b3b80d8
2016-10-03Use getSize instead of data().size(). NFC.Rafael Espindola
Also assert isFinalized in getSize(). This just reduces the noise from another patch. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@283125 91177308-0d34-0410-b5e6-96231b3b80d8
2016-06-27[yaml2obj] Remove --format option in favor of YAML tagsChris Bieneman
Summary: Our YAML library's handling of tags isn't perfect, but it is good enough to get rid of the need for the --format argument to yaml2obj. This patch does exactly that. Instead of requiring --format, it infers the format based on the tags found in the object file. The supported tags are: !ELF !COFF !mach-o !fat-mach-o I have a corresponding patch that is quite large that fixes up all the in-tree test cases. Reviewers: rafael, Bigcheese, compnerd, silvas Subscribers: compnerd, llvm-commits Differential Revision: http://reviews.llvm.org/D21711 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@273915 91177308-0d34-0410-b5e6-96231b3b80d8
2016-03-01Move ObjectYAML code to a new library.Rafael Espindola
It is only ever used by obj2yaml and yaml2obj. No point in linking it everywhere. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@262368 91177308-0d34-0410-b5e6-96231b3b80d8
2016-01-14Update to use new name alignTo().Rui Ueyama
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@257804 91177308-0d34-0410-b5e6-96231b3b80d8
2015-10-23Add a RAW mode to StringTableBuilder.Rafael Espindola
In this mode it just tries to tail merge the strings without imposing any other format constrains. It will not, for example, add a null byte between them. Also add support for keeping a tentative size and offset if we decide to not optimize after all. This will be used shortly in lld for merging SHF_STRINGS sections. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@251153 91177308-0d34-0410-b5e6-96231b3b80d8
2015-08-27[yaml2obj] Support numeric indexes to create invalid files. Will be used by ↵Michael J. Spencer
lld test. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@246233 91177308-0d34-0410-b5e6-96231b3b80d8
2015-07-09[yaml2obj] Initialize sh_addralign field for the .symtab sectionSimon Atanasyan
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241835 91177308-0d34-0410-b5e6-96231b3b80d8
2015-07-08[yaml2obj] Align section content using AddressAlign field's valueSimon Atanasyan
Use AddressAlign field's value to properly align sections content in the yaml2obj tool. Before this change the yaml2obj ignored AddressAlign and always aligned section on 16 bytes boundary. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241674 91177308-0d34-0410-b5e6-96231b3b80d8
2015-07-03[ELFYAML] Fix handling SHT_NOBITS sections by obj2yaml/yaml2obj toolsSimon Atanasyan
SHT_NOBITS sections do not have content in an object file. Now the yaml2obj tool does not accept `Content` field for such sections, and the obj2yaml tool does not attempt to read the section content from a file. Restore r241350 and r241352. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241377 91177308-0d34-0410-b5e6-96231b3b80d8
2015-07-03This reverts commit r241350 and r241352.Rafael Espindola
r241350 broke lld tests. r241352 depends on r241350. Original messages: "[ELFYAML] Fix handling SHT_NOBITS sections by obj2yaml/yaml2obj tools" "[ELFYAML] Make the Size field for .bss section optional" git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241354 91177308-0d34-0410-b5e6-96231b3b80d8
2015-07-03[ELFYAML] Fix handling SHT_NOBITS sections by obj2yaml/yaml2obj toolsSimon Atanasyan
SHT_NOBITS sections do not have content in an object file. Now yaml2obj tool does not accept `Content` field for such sections, and obj2yaml tool does not attempt to read the section content from a file. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241350 91177308-0d34-0410-b5e6-96231b3b80d8
2015-06-02Simplify now that we always use an alignment of 2 for ELF files.Rafael Espindola
This saves 123144 bytes out of llvm-nm on powerpc64le. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@238824 91177308-0d34-0410-b5e6-96231b3b80d8
2015-05-08[yaml2elf] Replace error message by assert call in writeSectionContent methodsSimon Atanasyan
Now caller of ELFState::writeSectionContent() methods is responsible to check a section type and selects an appropriate writeSectionContent method. So unexpected section type inside writeSectionContent method indicates a wrong usage of the method and should be guarded by assert. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@236808 91177308-0d34-0410-b5e6-96231b3b80d8
2015-05-07[obj2yaml/yaml2obj] Add SHT_MIPS_ABIFLAGS section supportSimon Atanasyan
This change adds support for the SHT_MIPS_ABIFLAGS section reading/writing to the obj2yaml and yaml2obj tools. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@236738 91177308-0d34-0410-b5e6-96231b3b80d8
2015-04-22Support arm32 R_ARM_V4BX relocation formatAdhemerval Zanella
ARM32 ELF R_ARM_V4BX relocation format is a special relocation type that records the location of an ARMv4t BX instruction to enable a static linker to generate ARMv4 compatible instructions. This relocation does not contain a reference symbol. This patch enabled its creation by removing the requeriment of a relocation symbol target in ELFState<ELFT>::writeSectionContent. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@235513 91177308-0d34-0410-b5e6-96231b3b80d8
2015-02-21[obj2yaml/yaml2obj] Add SHT_GROUP support.Shankar Easwaran
This adds section group support to the tools obj2yaml and yaml2obj. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@230124 91177308-0d34-0410-b5e6-96231b3b80d8
2015-01-25[ELFYAML] Support mips64 relocation record format in yaml2obj/obj2yamlSimon Atanasyan
MIPS64 ELF file has a very specific relocation record format. Each record might specify up to three relocation operations. So the `r_info` field in fact consists of three relocation type sub-fields and optional code of "special" symbols. http://techpubs.sgi.com/library/manuals/4000/007-4658-001/pdf/007-4658-001.pdf page 40 The patch implements support of the MIPS64 relocation record format in yaml2obj/obj2yaml tools by introducing new optional Relocation fields: Type2, Type3, and SpecSym. These fields are recognized only if the object/YAML file relates to the MIPS64 target. Differential Revision: http://reviews.llvm.org/D7136 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227044 91177308-0d34-0410-b5e6-96231b3b80d8
2014-11-19Remove StringMap::GetOrCreateValue in favor of StringMap::insertDavid Blaikie
Having two ways to do this doesn't seem terribly helpful and consistently using the insert version (which we already has) seems like it'll make the code easier to understand to anyone working with standard data structures. (I also updated many references to the Entry's key and value to use first() and second instead of getKey{Data,Length,} and get/setValue - for similar consistency) Also removes the GetOrCreateValue functions so there's less surface area to StringMap to fix/improve/change/accommodate move semantics, etc. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222319 91177308-0d34-0410-b5e6-96231b3b80d8
2014-11-06[ELF][yaml2obj] Handle additional MIPS specific st_other field flagsSimon Atanasyan
The ELF symbol `st_other` field might contain additional flags besides visibility ones. This patch implements support for some MIPS specific flags. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221491 91177308-0d34-0410-b5e6-96231b3b80d8
2014-09-29WinCOFFObjectWriter: optimize the string table for common sufficesHans Wennborg
This is a follow-up from r207670 which did the same for ELF. Differential Revision: http://reviews.llvm.org/D5530 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218636 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-03Invert the MC -> Object dependency.Rafael Espindola
Now that we have a lib/MC/MCAnalysis, the dependency was there just because of two helper classes. Move the two over to MC. This will allow IRObjectFile to parse inline assembly. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212248 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-06[yaml2obj][obj2yaml] Support ELF symbol's visibility flags ↵Simon Atanasyan
(default/hidden/protected). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210316 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-31[yaml2obj] Add new command line option `-docnum`.Simon Atanasyan
Input YAML file might contain multiple object file definitions. New option `-docnum` allows to specify an ordinal number (starting from 1) of definition used for an object file generation. Patch reviewed by Sean Silva. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209967 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-16[yaml2obj][ELF] Add an optional `Size` field to the YAML section declaration.Simon Atanasyan
Now the only method to configure ELF section's content and size is to assign a hexadecimal string to the `Content` field. Unfortunately this way is completely useless when you need to declare a really large section. To solve this problem this patch adds one more optional field `Size` to the `RawContentSection` structure. When yaml2obj generates an ELF file it uses the following algorithm: 1. If both `Content` and `Size` fields are missed create an empty section. 2. If only `Content` field is missed take section length from the `Size` field and fill the section by zero. 3. If only `Size` field is missed create a section using data from the `Content` field. 4. If both `Content` and `Size` fields are provided validate that the `Size` value is not less than size of `Content` data. Than take section length from the `Size`, fill beginning of the section by `Content` and the rest by zero. Examples -------- * Create a section 0x10000 bytes long filled by zero Name: .data Type: SHT_PROGBITS Flags: [ SHF_ALLOC ] Size: 0x10000 * Create a section 0x10000 bytes long starting from 'CA' 'FE' 'BA' 'BE' Name: .data Type: SHT_PROGBITS Flags: [ SHF_ALLOC ] Content: CAFEBABE Size: 0x10000 The patch reviewed by Michael Spencer. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@208995 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-15[yaml2obj] Add "-o" command line option to specify an output file name.Simon Atanasyan
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@208900 91177308-0d34-0410-b5e6-96231b3b80d8
2014-04-30Use the new StringTableBuilder in yaml2elfHans Wennborg
http://reviews.llvm.org/D3574 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207694 91177308-0d34-0410-b5e6-96231b3b80d8
2014-04-30ELFObjectWriter: deduplicate suffices in strtabHans Wennborg
We already do this for shstrtab, so might as well do it for strtab. This extracts the string table building code into a separate class. The idea is to use it for other object formats too. I mostly wanted to do this for the general principle, but it does save a little bit on object file size. I tried this on a clang bootstrap and saved 0.54% on the sum of object file sizes (1.14 MB out of 212 MB for a release build). Differential Revision: http://reviews.llvm.org/D3533 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207670 91177308-0d34-0410-b5e6-96231b3b80d8
2014-04-11[yaml2obj][ELF] ELF Relocations Support.Simon Atanasyan
The patch implements support for both relocation record formats: Elf_Rel and Elf_Rela. It is possible to define relocation against symbol only. Relocations against sections will be implemented later. Now yaml2obj recognizes X86_64, MIPS and Hexagon relocation types. Example of relocation section specification: Sections: - Name: .text Type: SHT_PROGBITS Content: "0000000000000000" AddressAlign: 16 Flags: [SHF_ALLOC] - Name: .rel.text Type: SHT_REL Info: .text AddressAlign: 4 Relocations: - Offset: 0x1 Symbol: glob1 Type: R_MIPS_32 - Offset: 0x2 Symbol: glob2 Type: R_MIPS_CALL16 The patch reviewed by Michael Spencer, Sean Silva, Shankar Easwaran. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206017 91177308-0d34-0410-b5e6-96231b3b80d8
2014-04-06[yaml2obj][ELF] Rename class SectionNameToIdxMap => NameToIdxMap. It canSimon Atanasyan
be used for indexing not only section's names. No functional changes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205687 91177308-0d34-0410-b5e6-96231b3b80d8
2014-04-02[yaml2obj][ELF] Convert some static functions into class members toSimon Atanasyan
reduce number of arguments. No functional changes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205434 91177308-0d34-0410-b5e6-96231b3b80d8
2014-04-02[yaml2obj][ELF] Remove unused typedef.Simon Atanasyan
No functional changes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205433 91177308-0d34-0410-b5e6-96231b3b80d8
2014-04-02[yaml2obj][ELF] Move section index to the ELFState class.Simon Atanasyan
No functional changes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205432 91177308-0d34-0410-b5e6-96231b3b80d8
2014-04-02[yaml2obj][ELF] Remove relationship between ELFStateSimon Atanasyan
and ContiguousBlobAccumulator classes. Pass ContiguousBlobAccumulator to the handleSymtabSectionHeader function directly. No functional changes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205431 91177308-0d34-0410-b5e6-96231b3b80d8
2014-03-31[yaml2obj] Add support for ELF e_flags.Daniel Sanders
Summary: The FileHeader mapping now accepts an optional Flags sequence that accepts the EF_<arch>_<flag> constants. When not given, Flags defaults to zero. Reviewers: atanasyan Reviewed By: atanasyan CC: llvm-commits Differential Revision: http://llvm-reviews.chandlerc.com/D3213 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205173 91177308-0d34-0410-b5e6-96231b3b80d8
2014-03-14[yaml2obj][ELF] Use range-based for loops.Simon Atanasyan
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203900 91177308-0d34-0410-b5e6-96231b3b80d8
2014-03-14[yaml2obj][ELF] Refer to a section in the error message by its name notSimon Atanasyan
index. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203899 91177308-0d34-0410-b5e6-96231b3b80d8
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