x86: Fix DT_JMPREL/DT_PLTRELSZ when relocs share a section
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Commit Message
From: Peter Edwards <peadar@arista.com>
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
@@ -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;
@@ -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*"]
new file mode 100644
@@ -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
new file mode 100644
@@ -0,0 +1,6 @@
+ .text
+ .globl foo
+foo:
+ jmp bar@PLT
+ leal func@GOT(%ebx), %eax
+ .section .note.GNU-stack,"",@progbits
new file mode 100644
@@ -0,0 +1,4 @@
+SECTIONS
+{
+ .rel.dyn : { *(.rel.*) }
+}
new file mode 100644
@@ -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
new file mode 100644
@@ -0,0 +1,6 @@
+ .text
+ .globl foo
+foo:
+ jmp bar@PLT
+ movq func@GOTPCREL(%rip), %rax
+ .section .note.GNU-stack,"",@progbits
new file mode 100644
@@ -0,0 +1,4 @@
+SECTIONS
+{
+ .rela.dyn : { *(.rela.*) }
+}
@@ -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"