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Adds support for generating the XCOFF data section in object files for global variables with initialization.
Merged aix-xcoff-common.ll into aix-xcoff-data.ll.
Changed variable name charr to chrarray in the test case to test if readobj works with 8-character names.
Authored by: xingxue
Reviewers: hubert.reinterptrtcast, sfertile, jasonliu, daltenty, Xiangling_L.
Reviewed by: hubert.reinterpretcast, sfertile, daltenty.
Subscribers: DiggerLin, Wuzish, nemanjai, hiraditya, MaskRay, jsji, shchenz, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D67125
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This is remaining part of rG41ca91f2995b: [AIX][XCOFF] Output XCOFF
object text section header and symbol entry for rogram code.
SUMMARY:
Original form of this patch is provided by Stefan Pintillie.
1. The patch try to output program code section header , symbol entry for
program code (PR) and Instruction into the raw text section.
2. The patch include how to alignment and layout the CSection in the text
section.
3. The patch also reorganize the code , put some codes into a function.
(XCOFFObjectWriter::writeSymbolTableEntryForControlSection)
Additional: We can not add raw data of text section test in the patch, If want
to output raw text section data,it need a function description patch first.
Reviewers: hubert.reinterpretcast, sfertile, jasonliu, xingxue.
Subscribers: wuzish, nemanjai, hiraditya, MaskRay, jsjji.
Differential Revision: https://reviews.llvm.org/D66969
llvm-svn: 374923
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This patch emits the function descriptor csect for functions with definitions
under both 32-bit/64-bit mode on AIX.
Differential Revision: https://reviews.llvm.org/D66724
llvm-svn: 373009
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Extend the common/local-common testing for object files to also verify the
symbol table now that the needed functionality has landed in llvm-readobj.
Differential Revision: https://reviews.llvm.org/D66944
llvm-svn: 371237
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Adds Wrapper classes for MCSymbol and MCSection into the XCOFF target
object writer. Also adds a class to represent the top-level sections, which we
materialize in the ObjectWriter.
executePostLayoutBinding will map all csects into the appropriate
container depending on its storage mapping class, and map all symbols
into their containing csect. Once all symbols have been processed we
- Assign addresses and symbol table indices.
- Calaculte section sizes.
- Build the section header table.
- Assign the sections raw-pointer value for non-virtual sections.
Since the .bss section is virtual, writing the header table is enough to
add support. Writing of a sections raw data, or of any relocations is
not included in this patch.
Testing is done by dumping the section header table, but it needs to be
extended to include dumping the symbol table once readobj support for
dumping auxiallary entries lands.
Differential Revision: https://reviews.llvm.org/D65159
llvm-svn: 369454
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Addresses number of comment made on D64652 after commiting:
- Reorders function decls in the TargetLoweringObjectFileXCOFF class.
- Fix comment in MCSectionXCOFF to include description of external reference
csects.
- Convert several llvm_unreachables to report_fatal_error
- Convert several dyn_casts to casts as they are expected not to fail.
- Avoid copying DataLayout object.
llvm-svn: 367324
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Stubs out a TargetLoweringObjectFileXCOFF class, implementing only
SelectSectionForGlobal for common symbols. Also adds an override of
EmitGlobalVariable in PPCAIXAsmPrinter which adds a number of defensive errors
and adds support for emitting common globals.
llvm-svn: 366727
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