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(localhost [IPv6:::1]) by gnu-cfl-3.localdomain (Postfix) with ESMTP id F29F67402E3; Wed, 23 Aug 2023 08:47:42 -0700 (PDT) From: "H.J. Lu" To: binutils@sourceware.org Cc: Peter Edwards Subject: [PATCH] x86: Fix DT_JMPREL/DT_PLTRELSZ when relocs share a section Date: Wed, 23 Aug 2023 08:47:33 -0700 Message-ID: <20230823154733.276739-1-hjl.tools@gmail.com> X-Mailer: git-send-email 2.41.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-3025.1 required=5.0 tests=BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM,GIT_PATCH_0,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS,TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: From: Peter Edwards If a linker script does not place the PLT relocations and "normal" relocations in separate ELF sections, `ld` will currently output incorrect values for DT_JMPREL and DT_PLTRELSZ - they cover the entire ELF section, rather than just the PLT relocations Don't ignore the extent of the BFD section - use the size of the srelplt BFD section and its offset from the output_secttion bfd/ PR ld/30787 * elfxx-x86.c (_bfd_x86_elf_finish_dynamic_sections): Use input section for DT_JMPREL and DT_PLTRELSZ. ld/ PR ld/30787 * testsuite/ld-i386/i386.exp: Run pr30787. * testsuite/ld-x86-64/x86-64.exp: Likewise. * testsuite/ld-i386/pr30787.d: New file. * testsuite/ld-i386/pr30787.s: Likewise. * testsuite/ld-i386/pr30787.t: Likewise. * testsuite/ld-x86-64/pr30787.d: Likewise. * testsuite/ld-x86-64/pr30787.s: Likewise. * testsuite/ld-x86-64/pr30787.t: Likewise. --- bfd/elfxx-x86.c | 5 +++-- ld/testsuite/ld-i386/i386.exp | 1 + ld/testsuite/ld-i386/pr30787.d | 7 +++++++ ld/testsuite/ld-i386/pr30787.s | 6 ++++++ ld/testsuite/ld-i386/pr30787.t | 4 ++++ ld/testsuite/ld-x86-64/pr30787.d | 7 +++++++ ld/testsuite/ld-x86-64/pr30787.s | 6 ++++++ ld/testsuite/ld-x86-64/pr30787.t | 4 ++++ ld/testsuite/ld-x86-64/x86-64.exp | 1 + 9 files changed, 39 insertions(+), 2 deletions(-) create mode 100644 ld/testsuite/ld-i386/pr30787.d create mode 100644 ld/testsuite/ld-i386/pr30787.s create mode 100644 ld/testsuite/ld-i386/pr30787.t create mode 100644 ld/testsuite/ld-x86-64/pr30787.d create mode 100644 ld/testsuite/ld-x86-64/pr30787.s create mode 100644 ld/testsuite/ld-x86-64/pr30787.t diff --git a/bfd/elfxx-x86.c b/bfd/elfxx-x86.c index f224e8f1354..103559d77ec 100644 --- a/bfd/elfxx-x86.c +++ b/bfd/elfxx-x86.c @@ -2771,11 +2771,12 @@ _bfd_x86_elf_finish_dynamic_sections (bfd *output_bfd, break; case DT_JMPREL: - dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma; + s = htab->elf.srelplt; + dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; break; case DT_PLTRELSZ: - s = htab->elf.srelplt->output_section; + s = htab->elf.srelplt; dyn.d_un.d_val = s->size; break; diff --git a/ld/testsuite/ld-i386/i386.exp b/ld/testsuite/ld-i386/i386.exp index 5f53bcf29bc..e8ad973eb36 100644 --- a/ld/testsuite/ld-i386/i386.exp +++ b/ld/testsuite/ld-i386/i386.exp @@ -511,6 +511,7 @@ run_dump_test "dt-relr-1a" run_dump_test "dt-relr-1b" run_dump_test "pr28870" run_dump_test "pr28894" +run_dump_test "pr30787" if { !([istarget "i?86-*-linux*"] || [istarget "i?86-*-gnu*"] diff --git a/ld/testsuite/ld-i386/pr30787.d b/ld/testsuite/ld-i386/pr30787.d new file mode 100644 index 00000000000..f82411da8b7 --- /dev/null +++ b/ld/testsuite/ld-i386/pr30787.d @@ -0,0 +1,7 @@ +#as: --32 +#ld: -melf_i386 -shared --no-warn-rwx-segments -T pr30787.t +#readelf: -d --wide + +#... + 0x0+2 \(PLTRELSZ\) +8 \(bytes\) +#pass diff --git a/ld/testsuite/ld-i386/pr30787.s b/ld/testsuite/ld-i386/pr30787.s new file mode 100644 index 00000000000..71594d2327e --- /dev/null +++ b/ld/testsuite/ld-i386/pr30787.s @@ -0,0 +1,6 @@ + .text + .globl foo +foo: + jmp bar@PLT + leal func@GOT(%ebx), %eax + .section .note.GNU-stack,"",@progbits diff --git a/ld/testsuite/ld-i386/pr30787.t b/ld/testsuite/ld-i386/pr30787.t new file mode 100644 index 00000000000..8c476209cba --- /dev/null +++ b/ld/testsuite/ld-i386/pr30787.t @@ -0,0 +1,4 @@ +SECTIONS +{ + .rel.dyn : { *(.rel.*) } +} diff --git a/ld/testsuite/ld-x86-64/pr30787.d b/ld/testsuite/ld-x86-64/pr30787.d new file mode 100644 index 00000000000..29102d4cc2c --- /dev/null +++ b/ld/testsuite/ld-x86-64/pr30787.d @@ -0,0 +1,7 @@ +#as: --64 +#ld: -melf_x86_64 -shared --no-warn-rwx-segments -T pr30787.t +#readelf: -d --wide + +#... + 0x0+2 \(PLTRELSZ\) +24 \(bytes\) +#pass diff --git a/ld/testsuite/ld-x86-64/pr30787.s b/ld/testsuite/ld-x86-64/pr30787.s new file mode 100644 index 00000000000..8bc774f1312 --- /dev/null +++ b/ld/testsuite/ld-x86-64/pr30787.s @@ -0,0 +1,6 @@ + .text + .globl foo +foo: + jmp bar@PLT + movq func@GOTPCREL(%rip), %rax + .section .note.GNU-stack,"",@progbits diff --git a/ld/testsuite/ld-x86-64/pr30787.t b/ld/testsuite/ld-x86-64/pr30787.t new file mode 100644 index 00000000000..66759cbb6a6 --- /dev/null +++ b/ld/testsuite/ld-x86-64/pr30787.t @@ -0,0 +1,4 @@ +SECTIONS +{ + .rela.dyn : { *(.rela.*) } +} diff --git a/ld/testsuite/ld-x86-64/x86-64.exp b/ld/testsuite/ld-x86-64/x86-64.exp index 1a10c395b5c..f94284b079c 100644 --- a/ld/testsuite/ld-x86-64/x86-64.exp +++ b/ld/testsuite/ld-x86-64/x86-64.exp @@ -505,6 +505,7 @@ run_dump_test "dt-relr-1a" run_dump_test "dt-relr-1a-x32" run_dump_test "dt-relr-1b" run_dump_test "dt-relr-1b-x32" +run_dump_test "pr30787" if { ![skip_sframe_tests] } { run_dump_test "sframe-simple-1" -- 2.41.0