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x86-64: Remove sframe relocs against discarded sections

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Since unlike eh_frame editing code, sframe editing code keeps
R_X86_64_NONE reloc as is, its r_offset is wrong, we must not
generate R_X86_64_NONE reloc in sframe section against discarded
sections for "ld -r".

bfd/

	PR ld/33156
	* elf64-x86-64.c (elf_x86_64_relocate_section): Also remove
	sframe relocations against discarded sections for "ld -r".

ld/

	PR ld/33156
	* testsuite/ld-elf/eh-group.exp (as_gsframe): New.
	Assemble eh-group.o with $as_gsframe.

Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
This commit is contained in:
H.J. Lu
2025-07-15 10:41:25 +08:00
parent 14c6a06be8
commit d7f343eaad
2 changed files with 13 additions and 4 deletions
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10
bfd/elf64-x86-64.c
View File

@@ -3268,10 +3268,14 @@ elf_x86_64_relocate_section (bfd *output_bfd,
wrel->r_addend = 0;
/* For ld -r, remove relocations in debug sections against
sections defined in discarded sections. Not done for
eh_frame editing code expects to be present. */
sections defined in discarded sections, including sframe
sections. Not done for eh_frame editing code expects to
be present. NB: Since sframe code keeps R_X86_64_NONE
reloc as is, its r_offset is wrong, we must not generate
R_X86_64_NONE reloc in sframe section. */
if (bfd_link_relocatable (info)
&& (input_section->flags & SEC_DEBUGGING))
&& ((input_section->flags & SEC_DEBUGGING) != 0
|| elf_section_type (input_section) == SHT_GNU_SFRAME))
wrel--;
continue;

7
ld/testsuite/ld-elf/eh-group.exp
View File

@@ -40,6 +40,11 @@ if ![is_elf_format] {
return
}
set as_gsframe ""
if { [gas_sframe_check] } {
set as_gsframe "--gsframe"
}
# alpha-linux-gnu does not support 64-bit relocations:
# relocation truncated to fit: REFLONG against `.gcc_except_table'
# arm-eabi does not support 64-bit relocations:
@@ -58,7 +63,7 @@ if [is_elf64 "tmpdir/eh-group1size.o"] {
set build_tests_ld [list \
[list "Build eh-group1.o" \
"-r" "" "$as_options" \
"-r" "" "$as_options $as_gsframe" \
{eh-group1.s eh-group2.s} {} "eh-group.o"] \
]