[PATCH v5 0/6] LoongArch linker relaxation support.

[mengqinggang]

This is the v5 version of patches to support loongarch linker relax.

This week, the kernek and grub was tested.

For kernel, I just did a simple test. It can be compiled correctly and
the OS can boot normally.

There are some "unsupported relocation" compile errors for grub,
because grub currently does not support relax/b16/b21/add/sub
relocations.

The new LoongArch ABI gitub repo will be released in the next
few days.

The patch set changelog:

v4 -> v5:
1. Change LOONGARCH to LoongArch.

mengqinggang (6):
  LoongArch: include: Add support for linker relaxation.
  LoongArch: bfd: Add support for linker relaxation.
  LoongArch: opcodes: Add support for linker relaxation.
  LoongArch: binutils: Add support for linker relaxation.
  LoongArch: gas: Add support for linker relaxation.
  LoongArch: ld: Add support for linker relaxation.

 bfd/bfd-in2.h                                 |   8 +
 bfd/elfnn-loongarch.c                         | 582 +++++++++++++--
 bfd/elfxx-loongarch.c                         | 676 +++++++++++++-----
 bfd/elfxx-loongarch.h                         |  10 +-
 bfd/libbfd.h                                  |   8 +
 bfd/reloc.c                                   |  22 +
 binutils/readelf.c                            |  84 ++-
 binutils/testsuite/binutils-all/readelf.exp   |  13 +-
 gas/config/tc-loongarch.c                     | 427 +++++++++--
 gas/config/tc-loongarch.h                     |  48 +-
 gas/testsuite/gas/all/align.d                 |   5 +-
 gas/testsuite/gas/all/gas.exp                 |  10 +-
 gas/testsuite/gas/all/relax.d                 |   4 +
 gas/testsuite/gas/elf/dwarf-5-irp.d           |   3 +-
 gas/testsuite/gas/elf/dwarf-5-loc0.d          |   3 +-
 gas/testsuite/gas/elf/dwarf-5-macro-include.d |   2 +-
 gas/testsuite/gas/elf/dwarf-5-macro.d         |   2 +-
 gas/testsuite/gas/elf/dwarf2-11.d             |   3 +-
 gas/testsuite/gas/elf/dwarf2-15.d             |   3 +-
 gas/testsuite/gas/elf/dwarf2-16.d             |   3 +-
 gas/testsuite/gas/elf/dwarf2-17.d             |   3 +-
 gas/testsuite/gas/elf/dwarf2-18.d             |   3 +-
 gas/testsuite/gas/elf/dwarf2-19.d             |   3 +-
 gas/testsuite/gas/elf/dwarf2-5.d              |   3 +-
 gas/testsuite/gas/elf/ehopt0.d                |   3 +
 gas/testsuite/gas/elf/elf.exp                 |   3 +
 gas/testsuite/gas/elf/section11.d             |   4 +-
 gas/testsuite/gas/lns/lns.exp                 |   1 +
 gas/testsuite/gas/loongarch/jmp_op.d          |  65 +-
 gas/testsuite/gas/loongarch/li.d              |   8 +-
 gas/testsuite/gas/loongarch/macro_op.d        |  68 +-
 gas/testsuite/gas/loongarch/macro_op_32.d     |  24 +-
 .../gas/loongarch/macro_op_large_abs.d        |  32 +-
 .../gas/loongarch/macro_op_large_pc.d         | 134 ++--
 gas/testsuite/gas/loongarch/relax_align.d     |  26 +
 gas/testsuite/gas/loongarch/relax_align.s     |   5 +
 gas/testsuite/gas/loongarch/uleb128.d         |  36 +
 gas/testsuite/gas/loongarch/uleb128.s         |  20 +
 include/elf/loongarch.h                       |  20 +
 include/opcode/loongarch.h                    |   3 +
 ld/emultempl/loongarchelf.em                  |   3 +
 ld/testsuite/ld-elf/compressed1d.d            |   3 +
 ld/testsuite/ld-elf/pr26936.d                 |   4 +-
 ld/testsuite/ld-loongarch-elf/disas-jirl-32.d |   2 +
 ld/testsuite/ld-loongarch-elf/disas-jirl.d    |   4 +-
 ld/testsuite/ld-loongarch-elf/jmp_op.d        |  65 +-
 ld/testsuite/ld-loongarch-elf/macro_op.d      |  84 ++-
 ld/testsuite/ld-loongarch-elf/macro_op_32.d   |  24 +-
 ld/testsuite/ld-loongarch-elf/relax-align.dd  |   7 +
 ld/testsuite/ld-loongarch-elf/relax-align.s   |   9 +
 ld/testsuite/ld-loongarch-elf/relax.exp       |  73 ++
 ld/testsuite/ld-loongarch-elf/relax.s         |  16 +
 ld/testsuite/ld-loongarch-elf/uleb128.dd      |  10 +
 ld/testsuite/ld-loongarch-elf/uleb128.s       |  21 +
 opcodes/loongarch-opc.c                       |   5 +-
 55 files changed, 2189 insertions(+), 521 deletions(-)
 create mode 100644 gas/testsuite/gas/loongarch/relax_align.d
 create mode 100644 gas/testsuite/gas/loongarch/relax_align.s
 create mode 100644 gas/testsuite/gas/loongarch/uleb128.d
 create mode 100644 gas/testsuite/gas/loongarch/uleb128.s
 create mode 100644 ld/testsuite/ld-loongarch-elf/relax-align.dd
 create mode 100644 ld/testsuite/ld-loongarch-elf/relax-align.s
 create mode 100644 ld/testsuite/ld-loongarch-elf/relax.exp
 create mode 100644 ld/testsuite/ld-loongarch-elf/relax.s
 create mode 100644 ld/testsuite/ld-loongarch-elf/uleb128.dd
 create mode 100644 ld/testsuite/ld-loongarch-elf/uleb128.s

-- 
2.36.0