[all-commits] [llvm/llvm-project] 71a398: [XCOFF] add C_FILE symbol at index 0 of symbol table.

[Chen Zheng via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 71a39862475e1d192d41d335452267590103acfc
      https://github.com/llvm/llvm-project/commit/71a39862475e1d192d41d335452267590103acfc
  Author: Chen Zheng <czhengsz at cn.ibm.com>
  Date:   2021-02-23 (Tue, 23 Feb 2021)

  Changed paths:
    M llvm/lib/MC/XCOFFObjectWriter.cpp
    M llvm/test/CodeGen/PowerPC/aix-extern-weak.ll
    M llvm/test/CodeGen/PowerPC/aix-extern.ll
    M llvm/test/CodeGen/PowerPC/aix-func-dsc-gen.ll
    M llvm/test/CodeGen/PowerPC/aix-llvm-intrinsic.ll
    M llvm/test/CodeGen/PowerPC/aix-overflow-toc.py
    M llvm/test/CodeGen/PowerPC/aix-user-defined-memcpy.ll
    M llvm/test/CodeGen/PowerPC/aix-weak.ll
    M llvm/test/CodeGen/PowerPC/aix-xcoff-data-sections.ll
    M llvm/test/CodeGen/PowerPC/aix-xcoff-data.ll
    M llvm/test/CodeGen/PowerPC/aix-xcoff-explicit-section.ll
    M llvm/test/CodeGen/PowerPC/aix-xcoff-lcomm.ll
    M llvm/test/CodeGen/PowerPC/aix-xcoff-reloc.ll
    M llvm/test/CodeGen/PowerPC/aix-xcoff-rodata.ll
    M llvm/test/CodeGen/PowerPC/aix-xcoff-symbol-rename.ll

  Log Message:
  -----------
  [XCOFF] add C_FILE symbol at index 0 of symbol table.

This is for XCOFF DWARF support.

Seems when DWARF debug is enable, symbol 0 has special usage
for AIX binder. At least, symbol 0 can not be the .text
section. Otherwise, we get some binding time error.

Add correct C_FILE symbol at index 0 here to make AIX binder
work.

Reviewed By: hubert.reinterpretcast

Differential Revision: https://reviews.llvm.org/D97117