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

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.

26 files changed, 345 insertions, 1 deletions

diff --git a/ld/ChangeLog b/ld/ChangeLog
index 66a5049..b5c8326 100644
--- a/ld/ChangeLog
+++ b/ld/ChangeLog
@@ -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.
diff --git a/ld/testsuite/ld-elf/elf.exp b/ld/testsuite/ld-elf/elf.exp
index 989fb50..7b8e8f6 100644
--- a/ld/testsuite/ld-elf/elf.exp
+++ b/ld/testsuite/ld-elf/elf.exp
@@ -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
 
diff --git a/ld/testsuite/ld-elf/pr24526.d b/ld/testsuite/ld-elf/pr24526.d
new file mode 100644
index 0000000..3faaa1e
--- /dev/null
+++ b/ld/testsuite/ld-elf/pr24526.d
@@ -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
diff --git a/ld/testsuite/ld-elf/pr24526.s b/ld/testsuite/ld-elf/pr24526.s
new file mode 100644
index 0000000..7d77338
--- /dev/null
+++ b/ld/testsuite/ld-elf/pr24526.s
@@ -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
diff --git a/ld/testsuite/ld-elf/pr25021.d b/ld/testsuite/ld-elf/pr25021.d
new file mode 100644
index 0000000..1cb6a87
--- /dev/null
+++ b/ld/testsuite/ld-elf/pr25021.d
@@ -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
diff --git a/ld/testsuite/ld-elf/pr25021.s b/ld/testsuite/ld-elf/pr25021.s
new file mode 100644
index 0000000..dd71202
--- /dev/null
+++ b/ld/testsuite/ld-elf/pr25021.s
@@ -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
diff --git a/ld/testsuite/ld-elf/pr25490-2-16.rd b/ld/testsuite/ld-elf/pr25490-2-16.rd
new file mode 100644
index 0000000..2e521cf
--- /dev/null
+++ b/ld/testsuite/ld-elf/pr25490-2-16.rd
@@ -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
diff --git a/ld/testsuite/ld-elf/pr25490-2-32.rd b/ld/testsuite/ld-elf/pr25490-2-32.rd
new file mode 100644
index 0000000..8b13348
--- /dev/null
+++ b/ld/testsuite/ld-elf/pr25490-2-32.rd
@@ -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
diff --git a/ld/testsuite/ld-elf/pr25490-2-64.rd b/ld/testsuite/ld-elf/pr25490-2-64.rd
new file mode 100644
index 0000000..6533042
--- /dev/null
+++ b/ld/testsuite/ld-elf/pr25490-2-64.rd
@@ -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
diff --git a/ld/testsuite/ld-elf/pr25490-2.s b/ld/testsuite/ld-elf/pr25490-2.s
new file mode 100644
index 0000000..856bb5f
--- /dev/null
+++ b/ld/testsuite/ld-elf/pr25490-2.s
@@ -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
diff --git a/ld/testsuite/ld-elf/pr25490-3-16.rd b/ld/testsuite/ld-elf/pr25490-3-16.rd
new file mode 100644
index 0000000..1c2f3d1
--- /dev/null
+++ b/ld/testsuite/ld-elf/pr25490-3-16.rd
@@ -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
diff --git a/ld/testsuite/ld-elf/pr25490-3-32.rd b/ld/testsuite/ld-elf/pr25490-3-32.rd
new file mode 100644
index 0000000..eb5587f
--- /dev/null
+++ b/ld/testsuite/ld-elf/pr25490-3-32.rd
@@ -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
diff --git a/ld/testsuite/ld-elf/pr25490-3-64.rd b/ld/testsuite/ld-elf/pr25490-3-64.rd
new file mode 100644
index 0000000..9fe794b
--- /dev/null
+++ b/ld/testsuite/ld-elf/pr25490-3-64.rd
@@ -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
diff --git a/ld/testsuite/ld-elf/pr25490-3.s b/ld/testsuite/ld-elf/pr25490-3.s
new file mode 100644
index 0000000..427ad69
--- /dev/null
+++ b/ld/testsuite/ld-elf/pr25490-3.s
@@ -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
diff --git a/ld/testsuite/ld-elf/pr25490-4-16.rd b/ld/testsuite/ld-elf/pr25490-4-16.rd
new file mode 100644
index 0000000..1f89d50
--- /dev/null
+++ b/ld/testsuite/ld-elf/pr25490-4-16.rd
@@ -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
diff --git a/ld/testsuite/ld-elf/pr25490-4-32.rd b/ld/testsuite/ld-elf/pr25490-4-32.rd
new file mode 100644
index 0000000..4562a6e
--- /dev/null
+++ b/ld/testsuite/ld-elf/pr25490-4-32.rd
@@ -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
diff --git a/ld/testsuite/ld-elf/pr25490-4-64.rd b/ld/testsuite/ld-elf/pr25490-4-64.rd
new file mode 100644
index 0000000..da295f3
--- /dev/null
+++ b/ld/testsuite/ld-elf/pr25490-4-64.rd
@@ -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
diff --git a/ld/testsuite/ld-elf/pr25490-4.s b/ld/testsuite/ld-elf/pr25490-4.s
new file mode 100644
index 0000000..5a31f8e
--- /dev/null
+++ b/ld/testsuite/ld-elf/pr25490-4.s
@@ -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
diff --git a/ld/testsuite/ld-elf/pr25490-5-16.rd b/ld/testsuite/ld-elf/pr25490-5-16.rd
new file mode 100644
index 0000000..b51eb53
--- /dev/null
+++ b/ld/testsuite/ld-elf/pr25490-5-16.rd
@@ -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
diff --git a/ld/testsuite/ld-elf/pr25490-5-32.rd b/ld/testsuite/ld-elf/pr25490-5-32.rd
new file mode 100644
index 0000000..8d6efb7
--- /dev/null
+++ b/ld/testsuite/ld-elf/pr25490-5-32.rd
@@ -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
diff --git a/ld/testsuite/ld-elf/pr25490-5-64.rd b/ld/testsuite/ld-elf/pr25490-5-64.rd
new file mode 100644
index 0000000..1375f9a
--- /dev/null
+++ b/ld/testsuite/ld-elf/pr25490-5-64.rd
@@ -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
diff --git a/ld/testsuite/ld-elf/pr25490-5.s b/ld/testsuite/ld-elf/pr25490-5.s
new file mode 100644
index 0000000..f9d46b8
--- /dev/null
+++ b/ld/testsuite/ld-elf/pr25490-5.s
@@ -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
diff --git a/ld/testsuite/ld-elf/pr25490-6-16.rd b/ld/testsuite/ld-elf/pr25490-6-16.rd
new file mode 100644
index 0000000..80eda13
--- /dev/null
+++ b/ld/testsuite/ld-elf/pr25490-6-16.rd
@@ -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
diff --git a/ld/testsuite/ld-elf/pr25490-6-32.rd b/ld/testsuite/ld-elf/pr25490-6-32.rd
new file mode 100644
index 0000000..3792842
--- /dev/null
+++ b/ld/testsuite/ld-elf/pr25490-6-32.rd
@@ -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
diff --git a/ld/testsuite/ld-elf/pr25490-6-64.rd b/ld/testsuite/ld-elf/pr25490-6-64.rd
new file mode 100644
index 0000000..a95ca48
--- /dev/null
+++ b/ld/testsuite/ld-elf/pr25490-6-64.rd
@@ -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
diff --git a/ld/testsuite/ld-elf/pr25490-6.s b/ld/testsuite/ld-elf/pr25490-6.s
new file mode 100644
index 0000000..43fbc17
--- /dev/null
+++ b/ld/testsuite/ld-elf/pr25490-6.s
@@ -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