toolchain/binutils/patches/2.39/039-LoongArch-ld-Fix-relocation-error-of-pcrel.patch

   1 From 509a2ec6ad3ea7eb3f4cf59538cf636a2126e4c3 Mon Sep 17 00:00:00 2001
   2 From: liuzhensong <liuzhensong@loongson.cn>
   3 Date: Fri, 2 Sep 2022 16:29:14 +0800
   4 Subject: [PATCH 039/160] LoongArch:ld: Fix relocation error of pcrel.
   5
   6   Patch for branch 2.39.
   7   Need to reduce the address of pc when using
   8   reloction R_LARCH_SOP_PUSH_PCREL.
   9
  10   bfd/
  11     * elfnn-loongarch.c
  12 ---
  13  bfd/elfnn-loongarch.c                         |  3 +-
  14  ld/testsuite/ld-loongarch-elf/pcrel-const.d   | 14 +++++++
  15  ld/testsuite/ld-loongarch-elf/pcrel-const.lds | 14 +++++++
  16  ld/testsuite/ld-loongarch-elf/pcrel-const.s   | 12 ++++++
  17  ld/testsuite/ld-loongarch-elf/pr.exp          | 39 +++++++++++++++++++
  18  5 files changed, 81 insertions(+), 1 deletion(-)
  19  create mode 100644 ld/testsuite/ld-loongarch-elf/pcrel-const.d
  20  create mode 100644 ld/testsuite/ld-loongarch-elf/pcrel-const.lds
  21  create mode 100644 ld/testsuite/ld-loongarch-elf/pcrel-const.s
  22  create mode 100644 ld/testsuite/ld-loongarch-elf/pr.exp
  23
  24 --- a/bfd/elfnn-loongarch.c
  25 +++ b/bfd/elfnn-loongarch.c
  26 @@ -2341,9 +2341,10 @@ loongarch_elf_relocate_section (bfd *out
  27         case R_LARCH_SOP_PUSH_PLT_PCREL:
  28           unresolved_reloc = false;
  29
  30 -         if (resolved_to_const)
  31 +         if (!is_undefweak && resolved_to_const)
  32             {
  33               relocation += rel->r_addend;
  34 +             relocation -= pc;
  35               break;
  36             }
  37           else if (is_undefweak)
  38 --- /dev/null
  39 +++ b/ld/testsuite/ld-loongarch-elf/pcrel-const.d
  40 @@ -0,0 +1,14 @@
  41 +#as: -mla-global-with-pcrel
  42 +#objdump: -Drsz
  43 +
  44 +.*:[    ]+file format .*
  45 +
  46 +
  47 +Disassembly of section .text:
  48 +
  49 +.* <foo>:
  50 +#...
  51 +[      ]+8:[   ]+02c04084[     ]+addi.d[       ]+\$a0,[        ]+\$a0,[        ]+16\(0x10\)
  52 +#...
  53 +0+14 <__sec_end>:
  54 +#pass
  55 --- /dev/null
  56 +++ b/ld/testsuite/ld-loongarch-elf/pcrel-const.lds
  57 @@ -0,0 +1,14 @@
  58 +ENTRY(foo);
  59 +SECTIONS
  60 +{
  61 +       .text : {
  62 +               *(.text*)
  63 +       }
  64 +
  65 +       .data : {
  66 +               __sec_start = .;
  67 +               *(.gzdata)
  68 +               __sec_end = .;
  69 +       }
  70 +}
  71 +PROVIDE(__sec_size = __sec_end);
  72 --- /dev/null
  73 +++ b/ld/testsuite/ld-loongarch-elf/pcrel-const.s
  74 @@ -0,0 +1,12 @@
  75 +       .text
  76 +       .align  2
  77 +       .globl  foo
  78 +       .type   foo, @function
  79 +foo:
  80 +       nop
  81 +       la.global       $r4,__sec_size
  82 +       ldptr.w $r4,$r4,0
  83 +       jr      $r1
  84 +       .size   foo, .-foo
  85 +       .data
  86 +       .word 1
  87 --- /dev/null
  88 +++ b/ld/testsuite/ld-loongarch-elf/pr.exp
  89 @@ -0,0 +1,39 @@
  90 +# Expect script for LoongArch ELF linker tests
  91 +#   Copyright (C) 2022 Free Software Foundation, Inc.
  92 +#
  93 +# This file is part of the GNU Binutils.
  94 +#
  95 +# This program is free software; you can redistribute it and/or modify
  96 +# it under the terms of the GNU General Public License as published by
  97 +# the Free Software Foundation; either version 3 of the License, or
  98 +# (at your option) any later version.
  99 +#
 100 +# This program is distributed in the hope that it will be useful,
 101 +# but WITHOUT ANY WARRANTY; without even the implied warranty of
 102 +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 103 +# GNU General Public License for more details.
 104 +#
 105 +# You should have received a copy of the GNU General Public License
 106 +# along with this program; if not, write to the Free Software
 107 +# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
 108 +# MA 02110-1301, USA.
 109 +#
 110 +
 111 +if ![istarget loongarch64-*-*] {
 112 +  return
 113 +}
 114 +
 115 +set link_tests [list \
 116 +  [list \
 117 +    "pcrel const" \
 118 +    "-T pcrel-const.lds" "" \
 119 +    "-mla-global-with-pcrel" \
 120 +    { pcrel-const.s } \
 121 +    [list \
 122 +      [list objdump -D pcrel-const.d] \
 123 +    ] \
 124 +    "pcrel-const" \
 125 +  ] \
 126 +]
 127 +
 128 +run_ld_link_tests $link_tests