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ELF: Support the section flag 'o' in .section directive

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As shown in

https://sourceware.org/bugzilla/show_bug.cgi?id=25490

--gc-sections will silently remove __patchable_function_entries section
and generate corrupt result.  This patch adds the section flag 'o' to
.section directive:

.section __patchable_function_entries,"awo",@progbits,foo
.section __patchable_function_entries,"awoG",@progbits,foo,foo,comdat
.section __patchable_function_entries,"awo",@progbits,bar,unique,4
.section __patchable_function_entries,"awoG",@progbits,foo,foo,comdat,unique,1

which specifies the symbol name which the section references.  Assmebler
will set its elf_linked_to_section to a local section where the symbol
is defined.

Linker is updated to call mark_hook if gc_mark of any of its linked-to
sections is set after all sections, except for backend specific ones,
have been garbage collected.

bfd/

	PR gas/25381
	* bfd-in2.h: Regenerated.
	* elflink.c (_bfd_elf_gc_mark_extra_sections): Call mark_hook
	on section if gc_mark of any of its linked-to sections is set
	and don't set gc_mark again.
	* section.c (asection): Add linked_to_symbol_name to map_head
	union.

gas/

	PR gas/25381
	* config/obj-elf.c (get_section): Also check
	linked_to_symbol_name.
	(obj_elf_change_section): Also set map_head.linked_to_symbol_name.
	(obj_elf_parse_section_letters): Handle the 'o' flag.
	(build_group_lists): Renamed to ...
	(build_additional_section_info): This.  Set elf_linked_to_section
	from map_head.linked_to_symbol_name.
	(elf_adjust_symtab): Updated.
	* config/obj-elf.h (elf_section_match): Add linked_to_symbol_name.
	* doc/as.texi: Document the 'o' flag.
	* testsuite/gas/elf/elf.exp: Run PR gas/25381 tests.
	* testsuite/gas/elf/section18.d: New file.
	* testsuite/gas/elf/section18.s: Likewise.
	* testsuite/gas/elf/section19.d: Likewise.
	* testsuite/gas/elf/section19.s: Likewise.
	* testsuite/gas/elf/section20.d: Likewise.
	* testsuite/gas/elf/section20.s: Likewise.
	* testsuite/gas/elf/section21.d: Likewise.
	* testsuite/gas/elf/section21.l: Likewise.
	* testsuite/gas/elf/section21.s: Likewise.

ld/

	PR ld/24526
	PR ld/25021
	PR ld/25490
	* testsuite/ld-elf/elf.exp: Run PR ld/25490 tests.
	* testsuite/ld-elf/pr24526.d: New file.
	* testsuite/ld-elf/pr24526.s: Likewise.
	* testsuite/ld-elf/pr25021.d: Likewise.
	* testsuite/ld-elf/pr25021.s: Likewise.
	* testsuite/ld-elf/pr25490-2-16.rd: Likewise.
	* testsuite/ld-elf/pr25490-2-32.rd: Likewise.
	* testsuite/ld-elf/pr25490-2-64.rd: Likewise.
	* testsuite/ld-elf/pr25490-2.s: Likewise.
	* testsuite/ld-elf/pr25490-3-16.rd: Likewise.
	* testsuite/ld-elf/pr25490-3-32.rd: Likewise.
	* testsuite/ld-elf/pr25490-3-64.rd: Likewise.
	* testsuite/ld-elf/pr25490-3.s: Likewise.
	* testsuite/ld-elf/pr25490-4-16.rd: Likewise.
	* testsuite/ld-elf/pr25490-4-32.rd: Likewise.
	* testsuite/ld-elf/pr25490-4-64.rd: Likewise.
	* testsuite/ld-elf/pr25490-4.s: Likewise.
	* testsuite/ld-elf/pr25490-5-16.rd: Likewise.
	* testsuite/ld-elf/pr25490-5-32.rd: Likewise.
	* testsuite/ld-elf/pr25490-5-64.rd: Likewise.
	* testsuite/ld-elf/pr25490-5.s: Likewise.
	* testsuite/ld-elf/pr25490-6-16.rd: Likewise.
	* testsuite/ld-elf/pr25490-6-32.rd: Likewise.
	* testsuite/ld-elf/pr25490-6-64.rd: Likewise.
	* testsuite/ld-elf/pr25490-6.s: Likewise.
This commit is contained in:
H.J. Lu 2020-02-06 18:04:58 -08:00
parent 3c83b08abf
commit b7d0721677
44 changed files with 578 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
bfd/ChangeLog
View File

@ -1,3 +1,13 @@
2020-02-06 H.J. Lu <hongjiu.lu@intel.com>
PR gas/25381
* bfd-in2.h: Regenerated.
* elflink.c (_bfd_elf_gc_mark_extra_sections): Call mark_hook
on section if gc_mark of any of its linked-to sections is set
and don't set gc_mark again.
* section.c (asection): Add linked_to_symbol_name to map_head
union.
2020-02-06 Maciej W. Rozycki <macro@wdc.com>
* elf32-v850.c (v850_elf_relax_section): Fix the index used for

4
bfd/bfd-in2.h
View File

@ -1185,10 +1185,12 @@ typedef struct bfd_section
/* Early in the link process, map_head and map_tail are used to build
a list of input sections attached to an output section. Later,
output sections use these fields for a list of bfd_link_order
structs. */
structs. The linked_to_symbol_name field is for ELF assembler
internal use. */
union {
struct bfd_link_order *link_order;
struct bfd_section *s;
const char *linked_to_symbol_name;
} map_head, map_tail;
} asection;

23
bfd/elflink.c
View File

@ -13316,7 +13316,7 @@ _bfd_elf_gc_mark_debug_special_section_group (asection *grp)
bfd_boolean
_bfd_elf_gc_mark_extra_sections (struct bfd_link_info *info,
elf_gc_mark_hook_fn mark_hook ATTRIBUTE_UNUSED)
elf_gc_mark_hook_fn mark_hook)
{
bfd *ibfd;
@ -13345,6 +13345,21 @@ _bfd_elf_gc_mark_extra_sections (struct bfd_link_info *info,
&& (isec->flags & SEC_ALLOC) != 0
&& elf_section_type (isec) != SHT_NOTE)
some_kept = TRUE;
else
{
/* Since all sections, except for backend specific ones,
have been garbage collected, call mark_hook on this
section if any of its linked-to sections is marked. */
asection *linked_to_sec = elf_linked_to_section (isec);
for (; linked_to_sec != NULL;
linked_to_sec = elf_linked_to_section (linked_to_sec))
if (linked_to_sec->gc_mark)
{
if (!_bfd_elf_gc_mark (info, isec, mark_hook))
return FALSE;
break;
}
}
if (!debug_frag_seen
&& (isec->flags & SEC_DEBUGGING)
@ -13359,14 +13374,16 @@ _bfd_elf_gc_mark_extra_sections (struct bfd_link_info *info,
/* Keep debug and special sections like .comment when they are
not part of a group. Also keep section groups that contain
just debug sections or special sections. */
just debug sections or special sections. NB: Sections with
linked-to section has been handled above. */
for (isec = ibfd->sections; isec != NULL; isec = isec->next)
{
if ((isec->flags & SEC_GROUP) != 0)
_bfd_elf_gc_mark_debug_special_section_group (isec);
else if (((isec->flags & SEC_DEBUGGING) != 0
|| (isec->flags & (SEC_ALLOC | SEC_LOAD | SEC_RELOC)) == 0)
&& elf_next_in_group (isec) == NULL)
&& elf_next_in_group (isec) == NULL
&& elf_linked_to_section (isec) == NULL)
isec->gc_mark = 1;
if (isec->gc_mark && (isec->flags & SEC_DEBUGGING) != 0)
has_kept_debug_info = TRUE;

4
bfd/section.c
View File

@ -544,10 +544,12 @@ CODE_FRAGMENT
. {* Early in the link process, map_head and map_tail are used to build
. a list of input sections attached to an output section. Later,
. output sections use these fields for a list of bfd_link_order
. structs. *}
. structs. The linked_to_symbol_name field is for ELF assembler
. internal use. *}
. union {
. struct bfd_link_order *link_order;
. struct bfd_section *s;
. const char *linked_to_symbol_name;
. } map_head, map_tail;
.} asection;
.

24
gas/ChangeLog
View File

@ -1,3 +1,27 @@
2020-02-06 H.J. Lu <hongjiu.lu@intel.com>
PR gas/25381
* config/obj-elf.c (get_section): Also check
linked_to_symbol_name.
(obj_elf_change_section): Also set map_head.linked_to_symbol_name.
(obj_elf_parse_section_letters): Handle the 'o' flag.
(build_group_lists): Renamed to ...
(build_additional_section_info): This. Set elf_linked_to_section
from map_head.linked_to_symbol_name.
(elf_adjust_symtab): Updated.
* config/obj-elf.h (elf_section_match): Add linked_to_symbol_name.
* doc/as.texi: Document the 'o' flag.
* testsuite/gas/elf/elf.exp: Run PR gas/25381 tests.
* testsuite/gas/elf/section18.d: New file.
* testsuite/gas/elf/section18.s: Likewise.
* testsuite/gas/elf/section19.d: Likewise.
* testsuite/gas/elf/section19.s: Likewise.
* testsuite/gas/elf/section20.d: Likewise.
* testsuite/gas/elf/section20.s: Likewise.
* testsuite/gas/elf/section21.d: Likewise.
* testsuite/gas/elf/section21.l: Likewise.
* testsuite/gas/elf/section21.s: Likewise.
2020-02-06 H.J. Lu <hongjiu.lu@intel.com>
* NEWS: Mention x86 assembler options to align branches for

52
gas/config/obj-elf.c
View File

@ -524,6 +524,8 @@ get_section (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *inf)
struct elf_section_match *match = (struct elf_section_match *) inf;
const char *gname = match->group_name;
const char *group_name = elf_group_name (sec);
const char *linked_to_symbol_name
= sec->map_head.linked_to_symbol_name;
unsigned int info = elf_section_data (sec)->this_hdr.sh_info;
return (info == match->info
@ -533,7 +535,12 @@ get_section (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *inf)
&& (group_name == gname
|| (group_name != NULL
&& gname != NULL
&& strcmp (group_name, gname) == 0)));
&& strcmp (group_name, gname) == 0))
&& (linked_to_symbol_name == match->linked_to_symbol_name
|| (linked_to_symbol_name != NULL
&& match->linked_to_symbol_name != NULL
&& strcmp (linked_to_symbol_name,
match->linked_to_symbol_name) == 0)));
}
/* Handle the .section pseudo-op. This code supports two different
@ -740,6 +747,10 @@ obj_elf_change_section (const char *name,
sec->section_id = match_p->section_id;
flags |= match_p->flags;
/* Set the linked-to symbol name. */
sec->map_head.linked_to_symbol_name
= match_p->linked_to_symbol_name;
bfd_set_section_flags (sec, flags);
if (flags & SEC_MERGE)
sec->entsize = entsize;
@ -801,6 +812,9 @@ obj_elf_parse_section_letters (char *str, size_t len,
case 'e':
attr |= SHF_EXCLUDE;
break;
case 'o':
attr |= SHF_LINK_ORDER;
break;
case 'w':
attr |= SHF_WRITE;
break;
@ -841,7 +855,7 @@ obj_elf_parse_section_letters (char *str, size_t len,
default:
{
const char *bad_msg = _("unrecognized .section attribute:"
" want a,e,w,x,M,S,G,T or number");
" want a,e,o,w,x,M,S,G,T or number");
#ifdef md_elf_section_letter
bfd_vma md_attr = md_elf_section_letter (*str, &bad_msg);
if (md_attr != (bfd_vma) -1)
@ -1154,6 +1168,19 @@ obj_elf_section (int push)
attr &= ~SHF_MERGE;
}
if ((attr & SHF_LINK_ORDER) != 0 && *input_line_pointer == ',')
{
char c;
unsigned int length;
++input_line_pointer;
SKIP_WHITESPACE ();
c = get_symbol_name (& beg);
(void) restore_line_pointer (c);
length = input_line_pointer - beg;
if (length)
match.linked_to_symbol_name = xmemdup0 (beg, length);
}
if ((attr & SHF_GROUP) != 0 && is_clone)
{
as_warn (_("? section flag ignored with G present"));
@ -2476,10 +2503,12 @@ static struct group_list groups;
/* Called via bfd_map_over_sections. If SEC is a member of a group,
add it to a list of sections belonging to the group. INF is a
pointer to a struct group_list, which is where we store the head of
each list. */
each list. If its link_to_symbol_name isn't NULL, set up its
linked-to section. */
static void
build_group_lists (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *inf)
build_additional_section_info (bfd *abfd ATTRIBUTE_UNUSED,
asection *sec, void *inf)
{
struct group_list *list = (struct group_list *) inf;
const char *group_name = elf_group_name (sec);
@ -2487,6 +2516,18 @@ build_group_lists (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *inf)
unsigned int *elem_idx;
unsigned int *idx_ptr;
if (sec->map_head.linked_to_symbol_name)
{
symbolS *linked_to_sym;
linked_to_sym = symbol_find (sec->map_head.linked_to_symbol_name);
if (!linked_to_sym || !S_IS_DEFINED (linked_to_sym))
as_bad (_("undefined linked-to symbol `%s' on section `%s'"),
sec->map_head.linked_to_symbol_name,
bfd_section_name (sec));
else
elf_linked_to_section (sec) = S_GET_SEGMENT (linked_to_sym);
}
if (group_name == NULL)
return;
@ -2533,7 +2574,8 @@ elf_adjust_symtab (void)
groups.num_group = 0;
groups.head = NULL;
groups.indexes = hash_new ();
bfd_map_over_sections (stdoutput, build_group_lists, &groups);
bfd_map_over_sections (stdoutput, build_additional_section_info,
&groups);
/* Make the SHT_GROUP sections that describe each section group. We
can't set up the section contents here yet, because elf section

1
gas/config/obj-elf.h
View File

@ -82,6 +82,7 @@ struct elf_obj_sy
struct elf_section_match
{
const char *group_name;
const char *linked_to_symbol_name;
unsigned int info;
unsigned int section_id;
flagword flags;

27
gas/doc/as.texi
View File

@ -6599,6 +6599,9 @@ section is allocatable
section is a GNU_MBIND section
@item e
section is excluded from executable and shared library.
@item o
section references a symbol defined in another section (the linked-to
section) in the same file.
@item w
section is writable
@item x
@ -6678,6 +6681,23 @@ which is a suffix of a larger string is considered a duplicate. Thus
@code{"def"} will be merged with @code{"abcdef"}; A reference to the first
@code{"def"} will be changed to a reference to @code{"abcdef"+3}.
If @var{flags} contains the @code{o} flag, then the @var{type} argument
must be present along with an additional field like this:
@smallexample
.section @var{name},"@var{flags}"o,@@@var{type},@var{SymbolName}
@end smallexample
The @var{SymbolName} field specifies the symbol name which the section
references.
Note: If both the @var{M} and @var{o} flags are present, then the fields
for the Merge flag should come first, like this:
@smallexample
.section @var{name},"@var{flags}"Mo,@@@var{type},@var{entsize},@var{SymbolName}
@end smallexample
If @var{flags} contains the @code{G} symbol then the @var{type} argument must
be present along with an additional field like this:
@ -6702,6 +6722,13 @@ the Merge flag should come first, like this:
.section @var{name} , "@var{flags}"MG, @@@var{type}, @var{entsize}, @var{GroupName}[, @var{linkage}]
@end smallexample
If both @code{o} flag and @code{G} flag are present, then the
@var{SymbolName} field for @code{o} comes first, like this:
@smallexample
.section @var{name},"@var{flags}"oG,@@@var{type},@var{SymbolName},@var{GroupName}[,@var{linkage}]
@end smallexample
If @var{flags} contains the @code{?} symbol then it may not also contain the
@code{G} symbol and the @var{GroupName} or @var{linkage} fields should not be
present. Instead, @code{?} says to consider the section that's current before

4
gas/testsuite/gas/elf/elf.exp
View File

@ -249,6 +249,10 @@ if { [is_elf_format] } then {
run_dump_test "section16a"
run_dump_test "section16b"
run_dump_test "section17"
run_dump_test "section18"
run_dump_test "section19"
run_dump_test "section20"
run_dump_test "section21"
run_dump_test "dwarf2-1" $dump_opts
run_dump_test "dwarf2-2" $dump_opts
run_dump_test "dwarf2-3" $dump_opts

8
gas/testsuite/gas/elf/section18.d Normal file
View File

@ -0,0 +1,8 @@
#readelf: -SW
#name: linked-to section 1
#...
+\[ *[0-9]+\] +__patchable_function_entries +PROGBITS +[0-9a-f]+ +[0-9a-f]+ +0+[248] +00 +WAL +.*
#...
+\[ *[0-9]+\] +__patchable_function_entries +PROGBITS +[0-9a-f]+ +[0-9a-f]+ +0+[248] +00 +WAL +.*
#pass

13
gas/testsuite/gas/elf/section18.s Normal file
View File

@ -0,0 +1,13 @@
.text
foo:
.section __patchable_function_entries,"awo",%progbits,foo
.dc.a .LPFE1
.text
.LPFE1:
.byte 0
.section __patchable_function_entries,"awo",%progbits,bar
.dc.a .LPFE2
.text
bar:
.LPFE2:
.byte 0

8
gas/testsuite/gas/elf/section19.d Normal file
View File

@ -0,0 +1,8 @@
#readelf: -SW
#name: linked-to section 2
#...
+\[ *[0-9]+\] +__patchable_function_entries +PROGBITS +[0-9a-f]+ +[0-9a-f]+ +0+[248] +00 +WAL +.*
#...
+\[ *[0-9]+\] +__patchable_function_entries +PROGBITS +[0-9a-f]+ +[0-9a-f]+ +0+[248] +00 +WAL +.*
#pass

13
gas/testsuite/gas/elf/section19.s Normal file
View File

@ -0,0 +1,13 @@
.section .text,"ax",%progbits,unique,20
foo:
.section __patchable_function_entries,"awo",%progbits,foo,unique,2
.dc.a .LPFE1
.section .text,"ax",%progbits,unique,20
.LPFE1:
.byte 0
.section __patchable_function_entries,"awo",%progbits,bar,unique,102
.dc.a .LPFE2
.section .text,"ax",%progbits,unique,2
bar:
.LPFE2:
.byte 0

17
gas/testsuite/gas/elf/section20.d Normal file
View File

@ -0,0 +1,17 @@
#readelf: -SWg
#name: linked-to section 3
#...
+\[ *[0-9]+\] +__patchable_function_entries +PROGBITS +[0-9a-f]+ +[0-9a-f]+ +0+[248] +00 +WALG +.*
#...
+\[ *[0-9]+\] +__patchable_function_entries +PROGBITS +[0-9a-f]+ +[0-9a-f]+ +0+[248] +00 +WALG +.*
#...
COMDAT group section \[[ 0-9]+\] `.group' \[foo\] contains [0-9]+ sections:
\[Index\] Name
#...
\[[ 0-9]+\] __patchable_function_entries
#...
COMDAT group section \[[ 0-9]+\] `.group' \[bar\] contains [0-9]+ sections:
#...
\[[ 0-9]+\] __patchable_function_entries
#pass

13
gas/testsuite/gas/elf/section20.s Normal file
View File

@ -0,0 +1,13 @@
.section .text,"axG",%progbits,foo,comdat
foo:
.section __patchable_function_entries,"awoG",%progbits,foo,foo,comdat
.dc.a .LPFE1
.section .text,"axG",%progbits,foo,comdat
.LPFE1:
.byte 0
.section __patchable_function_entries,"awoG",%progbits,bar,bar,comdat,unique,4
.dc.a .LPFE2
.section .text,"axG",%progbits,bar,comdat,unique,24
bar:
.LPFE2:
.byte 0

2
gas/testsuite/gas/elf/section21.d Normal file
View File

@ -0,0 +1,2 @@
#name: incorrect linked-to symbols
#error_output: section21.l

5
gas/testsuite/gas/elf/section21.l Normal file
View File

@ -0,0 +1,5 @@
[^:]*: Assembler messages:
[^:]*:11: Error: junk at end of line, first unrecognized character is `1'
#...
[^:]*: Error: undefined linked-to symbol `bar' on section `__patchable_function_entries'
[^:]*: Error: undefined linked-to symbol `foo' on section `__patchable_function_entries'

15
gas/testsuite/gas/elf/section21.s Normal file
View File

@ -0,0 +1,15 @@
.section __patchable_function_entries,"awo",%progbits,bar
.dc.a .LPFE1
.text
.LPFE1:
.byte 0
.section __patchable_function_entries,"awo",%progbits,foo
.dc.a .LPFE2
.text
.LPFE2:
.dc.a foo
.section __patchable_function_entries,"awo",%progbits,1foo
.dc.a .LPFE3
.text
.LPFE3:
.byte 0

33
ld/ChangeLog
View File

@ -1,4 +1,35 @@
2020-02-07 H.J. Lu <hongjiu.lu@intel.com>
2020-02-06 H.J. Lu <hongjiu.lu@intel.com>
PR ld/24526
PR ld/25021
PR ld/25490
* testsuite/ld-elf/elf.exp: Run PR ld/25490 tests.
* testsuite/ld-elf/pr24526.d: New file.
* testsuite/ld-elf/pr24526.s: Likewise.
* testsuite/ld-elf/pr25021.d: Likewise.
* testsuite/ld-elf/pr25021.s: Likewise.
* testsuite/ld-elf/pr25490-2-16.rd: Likewise.
* testsuite/ld-elf/pr25490-2-32.rd: Likewise.
* testsuite/ld-elf/pr25490-2-64.rd: Likewise.
* testsuite/ld-elf/pr25490-2.s: Likewise.
* testsuite/ld-elf/pr25490-3-16.rd: Likewise.
* testsuite/ld-elf/pr25490-3-32.rd: Likewise.
* testsuite/ld-elf/pr25490-3-64.rd: Likewise.
* testsuite/ld-elf/pr25490-3.s: Likewise.
* testsuite/ld-elf/pr25490-4-16.rd: Likewise.
* testsuite/ld-elf/pr25490-4-32.rd: Likewise.
* testsuite/ld-elf/pr25490-4-64.rd: Likewise.
* testsuite/ld-elf/pr25490-4.s: Likewise.
* testsuite/ld-elf/pr25490-5-16.rd: Likewise.
* testsuite/ld-elf/pr25490-5-32.rd: Likewise.
* testsuite/ld-elf/pr25490-5-64.rd: Likewise.
* testsuite/ld-elf/pr25490-5.s: Likewise.
* testsuite/ld-elf/pr25490-6-16.rd: Likewise.
* testsuite/ld-elf/pr25490-6-32.rd: Likewise.
* testsuite/ld-elf/pr25490-6-64.rd: Likewise.
* testsuite/ld-elf/pr25490-6.s: Likewise.
2020-02-06 H.J. Lu <hongjiu.lu@intel.com>
* testsuite/lib/ld-lib.exp (check_gc_sections_available): Mark
z80 as not supported.

63
ld/testsuite/ld-elf/elf.exp
View File

@ -76,9 +76,32 @@ run_ld_link_tests [list \
if [is_elf64 tmpdir/symbol3w.a] {
set ASFLAGS "$ASFLAGS --defsym ALIGN=3"
set pr23900_1_exp "pr23900-1-64.rd"
set pr25490_2_exp "pr25490-2-64.rd"
set pr25490_3_exp "pr25490-3-64.rd"
set pr25490_4_exp "pr25490-4-64.rd"
set pr25490_5_exp "pr25490-5-64.rd"
set pr25490_6_exp "pr25490-6-64.rd"
} else {
set ASFLAGS "$ASFLAGS --defsym ALIGN=2"
set pr23900_1_exp "pr23900-1-32.rd"
if { [istarget avr-*-*]
|| [istarget h8300-*-*]
|| [istarget ip2k-*-*]
|| [istarget m68hc11-*]
|| [istarget "xc16x-*"]
|| [istarget "z80-*-*"] } {
set pr25490_2_exp "pr25490-2-16.rd"
set pr25490_3_exp "pr25490-3-16.rd"
set pr25490_4_exp "pr25490-4-16.rd"
set pr25490_5_exp "pr25490-5-16.rd"
set pr25490_6_exp "pr25490-6-16.rd"
} else {
set pr25490_2_exp "pr25490-2-32.rd"
set pr25490_3_exp "pr25490-3-32.rd"
set pr25490_4_exp "pr25490-4-32.rd"
set pr25490_5_exp "pr25490-5-32.rd"
set pr25490_6_exp "pr25490-6-32.rd"
}
}
@ -172,6 +195,46 @@ if { [istarget *-*-*linux*]
]
}
if [check_gc_sections_available] {
run_ld_link_tests [list \
[list "__patchable_function_entries section 2" \
"--gc-sections -e _start" \
"" \
"" \
{pr25490-2.s} \
[list [list "readelf" {-SW} $pr25490_2_exp]] \
"pr25490-2.exe"] \
[list "__patchable_function_entries section 3" \
"--gc-sections -e _start" \
"" \
"" \
{pr25490-3.s} \
[list [list "readelf" {-SW} $pr25490_3_exp]] \
"pr25490-3.exe"] \
[list "__patchable_function_entries section 4" \
"--gc-sections -e _start" \
"" \
"" \
{pr25490-4.s} \
[list [list "readelf" {-SW} $pr25490_4_exp]] \
"pr25490-4.exe"] \
[list "__patchable_function_entries section 5" \
"--gc-sections -e _start" \
"" \
"" \
{pr25490-5.s} \
[list [list "readelf" {-SW} $pr25490_5_exp]] \
"pr25490-5.exe"] \
[list "__patchable_function_entries section 6" \
"--gc-sections -e _start" \
"" \
"" \
{pr25490-6.s} \
[list [list "readelf" {-SW} $pr25490_6_exp]] \
"pr25490-6.exe"] \
]
}
set LDFLAGS $old_ldflags
set ASFLAGS $old_asflags

9
ld/testsuite/ld-elf/pr24526.d Normal file
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@ -0,0 +1,9 @@
#ld: --gc-sections -e _start
#target: [check_gc_sections_available]
#readelf: -SW
#...
+\[ *[0-9]+\] \.bar +PROGBITS +[0-9a-f]+ +[0-9a-f]+ [0-9a-f]+ +00 +AL .*
#...
+\[ *[0-9]+\] \.zed +PROGBITS +[0-9a-f]+ +[0-9a-f]+ [0-9a-f]+ +00 +AL .*
#pass

13
ld/testsuite/ld-elf/pr24526.s Normal file
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@ -0,0 +1,13 @@
.text
.globl _start
_start:
.byte 0
.section .note,"",%note
.dc.a .foo
.section .foo,"a"
.dc.a 0
.section .bar,"ao",%progbits,.foo
.dc.a 0
.section .zed,"ao",%progbits,.foo
.dc.a 0

7
ld/testsuite/ld-elf/pr25021.d Normal file
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@ -0,0 +1,7 @@
#ld: --gc-sections -e _start
#target: [check_gc_sections_available]
#readelf: -SW
#...
+\[ *[0-9]+\] \.stack_sizes +PROGBITS +0+ +[0-9a-f]+ 0+1 +00 +L +[0-9] .*
#pass

22
ld/testsuite/ld-elf/pr25021.s Normal file
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@ -0,0 +1,22 @@
.section .text.live,"ax",%progbits
.globl live
live:
.byte 0
.section .stack_sizes,"o",%progbits,.text.live,unique,0
.byte 1
.section .text.dead,"ax",%progbits
.globl dead
dead:
.byte 1
.section .stack_sizes,"o",%progbits,.text.dead,unique,1
.byte 2
.section .text.main,"ax",%progbits
.globl _start
_start:
.byte 0
.section .note,"",%note
.dc.a live

7
ld/testsuite/ld-elf/pr25490-2-16.rd Normal file
View File

@ -0,0 +1,7 @@
#source: pr25490-2.s
#ld: --gc-sections -e _start
#readelf: -SW
#...
+\[ *[0-9]+\] __patchable_function_entries +PROGBITS +[0-9a-f]+ +[0-9a-f]+ +0+2 +00 +WAL +[0-9] +0 +[1248]
#pass

7
ld/testsuite/ld-elf/pr25490-2-32.rd Normal file
View File

@ -0,0 +1,7 @@
#source: pr25490-2.s
#ld: --gc-sections -e _start
#readelf: -SW
#...
+\[ *[0-9]+\] __patchable_function_entries +PROGBITS +[0-9a-f]+ +[0-9a-f]+ +0+4 +00 +WAL +[0-9] +0 +[1248]
#pass

7
ld/testsuite/ld-elf/pr25490-2-64.rd Normal file
View File

@ -0,0 +1,7 @@
#source: pr25490-2.s
#ld: --gc-sections -e _start
#readelf: -SW
#...
+\[ *[0-9]+\] __patchable_function_entries +PROGBITS +[0-9a-f]+ +[0-9a-f]+ +0+8 +00 +WAL +[0-9] +0 +[1248]
#pass

9
ld/testsuite/ld-elf/pr25490-2.s Normal file
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@ -0,0 +1,9 @@
.text
.globl _start
.type _start, %function
_start:
.section __patchable_function_entries,"awo",%progbits,_start
.dc.a .LPFE1
.text
.LPFE1:
.byte 0

7
ld/testsuite/ld-elf/pr25490-3-16.rd Normal file
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@ -0,0 +1,7 @@
#source: pr25490-3.s
#ld: --gc-sections -e _start
#readelf: -SW
#...
+\[ *[0-9]+\] __patchable_function_entries +PROGBITS +[0-9a-f]+ +[0-9a-f]+ +0+2 +00 +WAL +[0-9] +0 +[1248]
#pass

7
ld/testsuite/ld-elf/pr25490-3-32.rd Normal file
View File

@ -0,0 +1,7 @@
#source: pr25490-3.s
#ld: --gc-sections -e _start
#readelf: -SW
#...
+\[ *[0-9]+\] __patchable_function_entries +PROGBITS +[0-9a-f]+ +[0-9a-f]+ +0+4 +00 +WAL +[0-9] +0 +[1248]
#pass

7
ld/testsuite/ld-elf/pr25490-3-64.rd Normal file
View File

@ -0,0 +1,7 @@
#source: pr25490-3.s
#ld: --gc-sections -e _start
#readelf: -SW
#...
+\[ *[0-9]+\] __patchable_function_entries +PROGBITS +[0-9a-f]+ +[0-9a-f]+ +0+8 +00 +WAL +[0-9] +0 +[1248]
#pass

18
ld/testsuite/ld-elf/pr25490-3.s Normal file
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@ -0,0 +1,18 @@
.section .text.bar,"ax",%progbits
.globl bar
.type bar, %function
bar:
.section __patchable_function_entries,"awo",%progbits,bar
.dc.a .LPFE1
.section .text.bar,"ax",%progbits
.LPFE1:
.byte 0
.section .text._start,"ax",%progbits
.globl _start
.type _start, %function
_start:
.section __patchable_function_entries,"awo",%progbits,_start
.dc.a .LPFE2
.section .text._start,"ax",%progbits
.LPFE2:
.byte 0

7
ld/testsuite/ld-elf/pr25490-4-16.rd Normal file
View File

@ -0,0 +1,7 @@
#source: pr25490-4.s
#ld: --gc-sections -e _start
#readelf: -SW
#...
+\[ *[0-9]+\] __patchable_function_entries +PROGBITS +[0-9a-f]+ +[0-9a-f]+ +0+4 +00 +WAL +[0-9] +0 +[1248]
#pass

7
ld/testsuite/ld-elf/pr25490-4-32.rd Normal file
View File

@ -0,0 +1,7 @@
#source: pr25490-4.s
#ld: --gc-sections -e _start
#readelf: -SW
#...
+\[ *[0-9]+\] __patchable_function_entries +PROGBITS +[0-9a-f]+ +[0-9a-f]+ +0+8 +00 +WAL +[0-9] +0 +[1248]
#pass

7
ld/testsuite/ld-elf/pr25490-4-64.rd Normal file
View File

@ -0,0 +1,7 @@
#source: pr25490-4.s
#ld: --gc-sections -e _start
#readelf: -SW
#...
+\[ *[0-9]+\] __patchable_function_entries +PROGBITS +[0-9a-f]+ +[0-9a-f]+ +0+10 +00 +WAL +[0-9] +0 +[1248]
#pass

20
ld/testsuite/ld-elf/pr25490-4.s Normal file
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@ -0,0 +1,20 @@
.section .text.bar,"ax",%progbits
.globl bar
.type bar, %function
bar:
.section __patchable_function_entries,"awo",%progbits,bar
.dc.a .LPFE1
.section .text.bar,"ax",%progbits
.LPFE1:
.byte 0
.section .text._start,"ax",%progbits
.globl _start
.type _start, %function
_start:
.section __patchable_function_entries,"awo",%progbits,_start
.dc.a .LPFE2
.section .text._start,"ax",%progbits
.LPFE2:
.byte 0
.section .note,"",%note
.dc.a bar

7
ld/testsuite/ld-elf/pr25490-5-16.rd Normal file
View File

@ -0,0 +1,7 @@
#source: pr25490-5.s
#ld: --gc-sections -e _start
#readelf: -SW
#...
+\[ *[0-9]+\] __patchable_function_entries +PROGBITS +[0-9a-f]+ +[0-9a-f]+ +0+4 +00 +WAL +[0-9] +0 +[1248]
#pass

7
ld/testsuite/ld-elf/pr25490-5-32.rd Normal file
View File

@ -0,0 +1,7 @@
#source: pr25490-5.s
#ld: --gc-sections -e _start
#readelf: -SW
#...
+\[ *[0-9]+\] __patchable_function_entries +PROGBITS +[0-9a-f]+ +[0-9a-f]+ +0+8 +00 +WAL +[0-9] +0 +[1248]
#pass

7
ld/testsuite/ld-elf/pr25490-5-64.rd Normal file
View File

@ -0,0 +1,7 @@
#source: pr25490-5.s
#ld: --gc-sections -e _start
#readelf: -SW
#...
+\[ *[0-9]+\] __patchable_function_entries +PROGBITS +[0-9a-f]+ +[0-9a-f]+ +0+10 +00 +WAL +[0-9] +0 +[1248]
#pass

17
ld/testsuite/ld-elf/pr25490-5.s Normal file
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@ -0,0 +1,17 @@
.text
.type bar, %function
bar:
.section __patchable_function_entries,"awo",%progbits,bar
.dc.a .LPFE1
.text
.LPFE1:
.byte 0
.text
.globl _start
.type _start, %function
_start:
.section __patchable_function_entries,"awo",%progbits,_start
.dc.a .LPFE2
.text
.LPFE2:
.byte 0

7
ld/testsuite/ld-elf/pr25490-6-16.rd Normal file
View File

@ -0,0 +1,7 @@
#source: pr25490-6.s
#ld: --gc-sections -e _start
#readelf: -SW
#...
+\[ *[0-9]+\] __patchable_function_entries +PROGBITS +[0-9a-f]+ +[0-9a-f]+ +0+6 +00 +WAL +[0-9] +0 +[1248]
#pass

7
ld/testsuite/ld-elf/pr25490-6-32.rd Normal file
View File

@ -0,0 +1,7 @@
#source: pr25490-6.s
#ld: --gc-sections -e _start
#readelf: -SW
#...
+\[ *[0-9]+\] __patchable_function_entries +PROGBITS +[0-9a-f]+ +[0-9a-f]+ +0+c +00 +WAL +[0-9] +0 +[1248]
#pass

7
ld/testsuite/ld-elf/pr25490-6-64.rd Normal file
View File

@ -0,0 +1,7 @@
#source: pr25490-6.s
#ld: --gc-sections -e _start
#readelf: -SW
#...
+\[ *[0-9]+\] __patchable_function_entries +PROGBITS +[0-9a-f]+ +[0-9a-f]+ +0+18 +00 +WAL +[0-9] +0 +[1248]
#pass

30
ld/testsuite/ld-elf/pr25490-6.s Normal file
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@ -0,0 +1,30 @@
.section .text,"axG",%progbits,bar,comdat
.globl bar
.type bar, %function
bar:
.section __patchable_function_entries,"awo",%progbits,bar
.dc.a .LPFE1
.section .text,"axG",%progbits,bar,comdat
.LPFE1:
.byte 0
.section .text,"axG",%progbits,foo,comdat
.globl foo
.type foo, %function
foo:
.section __patchable_function_entries,"awo",%progbits,foo,unique,0
.dc.a .LPFE2
.section .text,"axG",%progbits,foo,comdat
.LPFE2:
.byte 0
.section .text,"axG",%progbits,_start,comdat,unique,1
.globl _start
.type _start, %function
_start:
.section __patchable_function_entries,"awoG",%progbits,_start,_start,comdat,unique,3
.dc.a .LPFE3
.section .text,"axG",%progbits,_start,comdat,unique,1
.LPFE3:
.byte 0
.section .note,"",%note
.dc.a foo
.dc.a bar