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Arm64/ELF: accept relocations against STN_UNDEF

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While only a secondary issue there, the testcase of PR gas/27212 exposes
an oversight in relocation handling: Just like e.g. Arm32, which has a
similar comment and a similar check, relocations against STN_UNDEF have
to be permitted to satisfy the ELF spec.
This commit is contained in:
Jan Beulich
2023-03-31 08:15:53 +02:00
parent 56ce0c730b
commit af9eb2ee1b
1 changed files with 5 additions and 1 deletions
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6
bfd/elfnn-aarch64.c
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@@ -6946,8 +6946,12 @@ elfNN_aarch64_relocate_section (bfd *output_bfd,
/* An object file might have a reference to a local
undefined symbol. This is a daft object file, but we
should at least do something about it. */
should at least do something about it. NONE and NULL
relocations do not use the symbol and are explicitly
allowed to use an undefined one, so allow those.
Likewise for relocations against STN_UNDEF. */
if (r_type != R_AARCH64_NONE && r_type != R_AARCH64_NULL
&& r_symndx != STN_UNDEF
&& bfd_is_und_section (sec)
&& ELF_ST_BIND (sym->st_info) != STB_WEAK)
(*info->callbacks->undefined_symbol)