Files
clang-p2996/lld/test/ELF/linkerscript/merge-nonalloc.s
Rui Ueyama a592aeb35a 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

llvm-svn: 348291
2018-12-04 18:47:44 +00:00

15 lines
372 B
ArmAsm

# REQUIRES: x86
# RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %t.o
# RUN: echo "SECTIONS { .text : { *(.text) *(.nonalloc) } }" > %t.script
# RUN: ld.lld -shared -o %t.exe %t.script %t.o
# RUN: llvm-objdump -syms %t.exe | FileCheck %s
# CHECK: .text 00000000 nonalloc_start
_start:
nop
.section .nonalloc,"",@progbits
nonalloc_start:
.long 0xcafe