tree 5486be640af2046ffd688847a3b2761a379085be
parent 3e5effd0636beb84e0c4b0a2668bc8565033ce6c
author Rui Ueyama <ruiu@google.com> 1543949264 +0000
committer Rui Ueyama <ruiu@google.com> 1543949264 +0000

ELF: allow non allocated sections to go into allocated sections

Patch from Andrew Kelley.

For context, see https://bugs.llvm.org/show_bug.cgi?id=39862

The use case is embedded / OS programming where the kernel wants
access to its own debug info via mapped dwarf info. I have a proof of
concept of this working, using this linker script snippet:

  .rodata : ALIGN(4K) {
    *(.rodata)
    __debug_info_start = .;
    KEEP(*(.debug_info))
    __debug_info_end = .;
    __debug_abbrev_start = .;
    KEEP(*(.debug_abbrev))
    __debug_abbrev_end = .;
    __debug_str_start = .;
    KEEP(*(.debug_str))
    __debug_str_end = .;
    __debug_line_start = .;
    KEEP(*(.debug_line))
    __debug_line_end =
    .;
    __debug_ranges_start
    = .;
    KEEP(*(.debug_ranges))
    __debug_ranges_end
    = .;
  }

Differential revision: https://reviews.llvm.org/D55276

git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@348291 91177308-0d34-0410-b5e6-96231b3b80d8