mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-21 04:42:53 +08:00
2e0488d33f
If we are generating non-relocatable object and --emit-relocs specified,
aarch64 ld is actually generating wrong addend for rela entry when
relocate against local symbol.
for example, for simple testcase
foo.c
===
const char * const a = "foo";
const char *
foo ()
{
return a;
}
bar.c
===
const char * const b = "bar";
const char * bar ()
{
return b;
}
aarch64-none-linux-gnu-ld --emit-relocs -o x.o foo.o bar.o
aarch64-none-linux-gnu-readelf -r x.o
... R_AARCH64_ADR_PRE 0000000000400018 .rodata + 0
... R_AARCH64_ADD_ABS 0000000000400018 .rodata + 0
... R_AARCH64_ADR_PRE 0000000000400018 .rodata + 0
... R_AARCH64_ADD_ABS 0000000000400018 .rodata + 0
while it should be:
... R_AARCH64_ADR_PRE 0000000000400018 .rodata + 0
... R_AARCH64_ADD_ABS 0000000000400018 .rodata + 0
... R_AARCH64_ADR_PRE 0000000000400018 .rodata + 10
... R_AARCH64_ADD_ABS 0000000000400018 .rodata + 10
bfd generic code could actually handle this properly, but only when
elf_backend_rela_normal set to '1'.
this patch enable this and remove those target specific hack.
bfd/
* elfnn-aarch64.c (elf_backend_rela_normal): Set to 1.
(elfNN_aarch64_relocate_section): Remove duplicated addend adjustment
when info->relocatable be true.
ld/testsuite/
* ld-aarch64/emit-relocs-local-addend-bar.s: * New source file.
* ld-aarch64/emit-relocs-local-addend-foo.s: * Likewise.
* ld-aarch64/emit-relocs-local-addend.d: * New testcase.
* ld-aarch64/local-addend-r.d: Likewise.
20 lines
235 B
ArmAsm
20 lines
235 B
ArmAsm
.global b
|
|
.section .rodata
|
|
.align 3
|
|
.LC0:
|
|
.string "bar"
|
|
.align 3
|
|
.type b, %object
|
|
.size b, 8
|
|
b:
|
|
.xword .LC0
|
|
.text
|
|
.align 2
|
|
.global bar
|
|
.type bar, %function
|
|
bar:
|
|
adrp x0, .LC0
|
|
add x0, x0, :lo12:.LC0
|
|
ret
|
|
.size bar, .-bar
|