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Fix handling of GNU Property notes that are not in a GNU NOTE PROPERTY section.

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PR 22450
gas	* elf-properties.c (_bfd_elf_link_setup_gnu_properties): Skip
	objects without a GNU_PROPERTY note section when looking for a bfd
	onto which notes can be accumulated.

ld	* testsuite/ld-elf/elf.exp: Add --defsym ALIGN=2|3 to assembler
	command line depending upon the size of the target address space.
	* testsuite/ld-elf/pr22450.s: New test file.
	* testsuite/ld-elf/pr22450.d: New test driver.
	* testsuite/config/default.exp: Add note that LD_CLASS refers to
	the size of the host linker not the size of the target linker.
This commit is contained in:
Nick Clifton 2017-11-20 15:32:55 +00:00
parent b7486a74a6
commit b77db948f4
7 changed files with 96 additions and 5 deletions
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7
bfd/ChangeLog
View File

@ -1,3 +1,10 @@
2017-11-20 Nick Clifton <nickc@redhat.com>
PR 22450
* elf-properties.c (_bfd_elf_link_setup_gnu_properties): Skip
objects without a GNU_PROPERTY note section when looking for a bfd
onto which notes can be accumulated.
2017-11-20 Alan Modra <amodra@gmail.com>
PR 22451

14
bfd/elf-properties.c
View File

@ -328,11 +328,15 @@ _bfd_elf_link_setup_gnu_properties (struct bfd_link_info *info)
has_properties = TRUE;
/* Ignore GNU properties from ELF objects with different machine
code or class. */
code or class. Also skip objects without a GNU_PROPERTY note
section. */
if ((elf_machine_code
== get_elf_backend_data (abfd)->elf_machine_code)
&& (elfclass
== get_elf_backend_data (abfd)->s->elfclass))
== get_elf_backend_data (abfd)->s->elfclass)
&& bfd_get_section_by_name (abfd,
NOTE_GNU_PROPERTY_SECTION_NAME) != NULL
)
{
/* Keep .note.gnu.property section in FIRST_PBFD. */
first_pbfd = abfd;
@ -374,10 +378,11 @@ _bfd_elf_link_setup_gnu_properties (struct bfd_link_info *info)
if (list != NULL)
{
/* Discard .note.gnu.property section in the rest inputs. */
/* Discard the .note.gnu.property section in this bfd. */
sec = bfd_get_section_by_name (abfd,
NOTE_GNU_PROPERTY_SECTION_NAME);
sec->output_section = bfd_abs_section_ptr;
if (sec != NULL)
sec->output_section = bfd_abs_section_ptr;
}
}
@ -393,6 +398,7 @@ _bfd_elf_link_setup_gnu_properties (struct bfd_link_info *info)
sec = bfd_get_section_by_name (first_pbfd,
NOTE_GNU_PROPERTY_SECTION_NAME);
BFD_ASSERT (sec != NULL);
/* Update stack size in .note.gnu.property with -z stack-size=N
if N > 0. */

10
ld/ChangeLog
View File

@ -1,3 +1,13 @@
2017-11-20 Nick Clifton <nickc@redhat.com>
PR 22450
* testsuite/ld-elf/elf.exp: Add --defsym ALIGN=2|3 to assembler
command line depending upon the size of the target address space.
* testsuite/ld-elf/pr22450.s: New test file.
* testsuite/ld-elf/pr22450.d: New test driver.
* testsuite/config/default.exp: Add note that LD_CLASS refers to
the size of the host linker not the size of the target linker.
2017-11-15 Nick Clifton <nickc@redhat.com>
PR 15152

2
ld/testsuite/config/default.exp
View File

@ -251,7 +251,7 @@ if ![info exists LDFLAGS] then {
set LDFLAGS {}
}
# Set LD_CLASS to "64bit" for 64-bit LD.
# Set LD_CLASS to "64bit" for a 64-bit *host* linker.
if { ![info exists LD_CLASS] } then {
set REAL_LD [findfile $base_dir/.libs/ld-new .libs/ld-new $LD [transform ld]]
set readelf_output [run_host_cmd "$READELF" "-h $REAL_LD"]

37
ld/testsuite/ld-elf/elf.exp
View File

@ -61,6 +61,8 @@ if { [is_remote host] } then {
remote_download host merge.ld
}
# Note - the output file from the second test (symbol3w.a) is
# used in the proc is_elf64 test below...
run_ld_link_tests [list \
[list "Build symbol3.a" \
"" "" $hpux \
@ -70,6 +72,41 @@ run_ld_link_tests [list \
{symbol3w.s} {} "symbol3w.a" ] \
]
# True if the object format is known to be 64-bit ELF.
#
proc is_elf64 { binary_file } {
global READELF
global READELFFLAGS
set readelf_size ""
catch "exec $READELF $READELFFLAGS -h $binary_file > readelf.out" got
if ![string match "" $got] then {
return 0
}
if { ![regexp "\n\[ \]*Class:\[ \]*ELF(\[0-9\]+)\n" \
[file_contents readelf.out] nil readelf_size] } {
verbose "FAILED to determine ELF size"
return 0
}
if { $readelf_size == "64" } {
return 1
}
return 0
}
if [is_elf64 tmpdir/symbol3w.a] {
set ASFLAGS "$ASFLAGS --defsym ALIGN=3"
} else {
set ASFLAGS "$ASFLAGS --defsym ALIGN=2"
}
# Targets that use _bfd_generic_link_add_symbols won't pass pr21703 tests
run_ld_link_tests {
{"PR ld/21703"

12
ld/testsuite/ld-elf/pr22450.d Normal file
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@ -0,0 +1,12 @@
#source: pr22450.s
#readelf: --notes --wide
#ld: -r
# Fails on H8300 because it does not generate the correct relocs for the size fields.
# Fails on AVR, IP2K, M68HC11, SPARC64, XC16C because the assembler does not calculate the correct values for the differences of local symbols.
# Fails on CRX because readelf does not know how to apply CRX reloc number 20 (R_CRX_SWITCH32).
#...
Displaying notes found in: \.note\.gnu
[ ]+Owner[ ]+Data size[ ]+Description
[ ]+GNU[ ]+0x0+0..[ ]+NT_GNU_PROPERTY_TYPE_0[ ]+Properties: stack size: 0x8000
#pass

19
ld/testsuite/ld-elf/pr22450.s Normal file
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@ -0,0 +1,19 @@
.section ".note.gnu", "a" /* NB/ Deliberately incorrect section name. Should be: .note.gnu.property */
.p2align ALIGN
.dc.l 1f - 0f /* Name length. */
.dc.l 5f - 2f /* Data length. */
.dc.l 5 /* Note type: NT_GNU_PROPERTY_TYPE_0 */
0:
.asciz "GNU" /* Vendor name. */
1:
.p2align ALIGN
2:
.dc.l 1 /* pr_type: GNU_PROPERTY_STACK_SIZE */
.dc.l 5f - 4f /* pr_datasz. */
4:
.dc.a 0x8000 /* Stack size. */
5:
.p2align ALIGN
3: