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x86-64: Allocate input section memory if needed

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When --no-keep-memory is used, the input section memory may not be cached.
Allocate input section memory for -z pack-relative-relocs if needed.

bfd/

	PR ld/29939
	* elfxx-x86.c (elf_x86_size_or_finish_relative_reloc): Allocate
	input section memory if needed.

ld/

	PR ld/29939
	* testsuite/ld-elf/dt-relr-2i.d: New test.
This commit is contained in:
H.J. Lu
2022-12-27 11:41:11 -08:00
parent 767e2daed4
commit 9eb71a53bf
2 changed files with 40 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

25
bfd/elfxx-x86.c
View File

@ -1541,12 +1541,33 @@ elf_x86_size_or_finish_relative_reloc
} }
else else
{ {
bfd_byte *contents;
if (rel.r_offset >= sec->size) if (rel.r_offset >= sec->size)
abort (); abort ();
if (elf_section_data (sec)->this_hdr.contents
!= NULL)
contents
= elf_section_data (sec)->this_hdr.contents;
else
{
if (!bfd_malloc_and_get_section (sec->owner,
sec,
&contents))
info->callbacks->einfo
/* xgettext:c-format */
(_("%F%P: %pB: failed to allocate memory for section `%pA'\n"),
info->output_bfd, sec);
/* Cache the section contents for
elf_link_input_bfd. */
elf_section_data (sec)->this_hdr.contents
= contents;
}
htab->elf_write_addend htab->elf_write_addend
(info->output_bfd, outrel->r_addend, (info->output_bfd, outrel->r_addend,
(elf_section_data (sec)->this_hdr.contents contents + rel.r_offset);
+ rel.r_offset));
} }
} }
} }

17
ld/testsuite/ld-elf/dt-relr-2i.d Normal file
View File

@ -0,0 +1,17 @@
#source: dt-relr-2.s
#ld: -e _start -pie --no-keep-memory $DT_RELR_LDFLAGS
#readelf: -rW -d
#target: [supports_dt_relr]
#...
0x[0-9a-f]+ \(RELR\) +0x[0-9a-f]+
0x[0-9a-f]+ \(RELRSZ\) +(8|16) \(bytes\)
0x[0-9a-f]+ \(RELRENT\) +(4|8) \(bytes\)
#...
Relocation section '\.rel(a|)\.dyn' at offset 0x[0-9a-f]+ contains 1 entry:
#...
[0-9a-f]+ +[0-9a-f]+ +R_.*_(RELATIVE|UADDR.*) .*
#...
Relocation section '\.relr\.dyn' at offset 0x[0-9a-f]+ contains 2 entries:
4 offsets
#pass