ELF: test certain .bss usages

Various targets have / had overrides for .bss. Make sure that in such
cases
- .previous still works correctly (requiring such targets to invoke
  obj_elf_section_change_hook() from their overriding handlers),
- sub-section specifiers are accepted as far as feasible (mandated by
  the doc).

5 files changed, 47 insertions, 0 deletions

diff --git a/gas/testsuite/gas/elf/bss-prev.d b/gas/testsuite/gas/elf/bss-prev.d
new file mode 100644
index 0000000..b7ffac0
--- /dev/null
+++ b/gas/testsuite/gas/elf/bss-prev.d
@@ -0,0 +1,13 @@
+#name: .bss / .previous interaction
+#as: --no-pad-sections
+#readelf: -S --wide
+
+There are [0-9]+ section headers, starting at offset 0x[0-9a-f]+:
+
+Section Headers:
+ +\[Nr\] Name +Type +Addr(ess|) +Off +Size .*
+#...
+ *\[ [1-9]\] *\.text +PROGBITS +0*0 +0[0-9a-f]* 0+ .*
+ *\[ [1-9]\] *\.data +PROGBITS +0*0 +0[0-9a-f]* 0*1 .*
+ *\[ [1-9]\] *\.bss +NOBITS +0*0 +0[0-9a-f]* 0*1 .*
+#pass
diff --git a/gas/testsuite/gas/elf/bss-prev.s b/gas/testsuite/gas/elf/bss-prev.s
new file mode 100644
index 0000000..27564ce
--- /dev/null
+++ b/gas/testsuite/gas/elf/bss-prev.s
@@ -0,0 +1,6 @@
+	.text
+	.data
+	.bss
+	.byte 0
+	.previous
+	.byte 1
diff --git a/gas/testsuite/gas/elf/bss-subsect.d b/gas/testsuite/gas/elf/bss-subsect.d
new file mode 100644
index 0000000..ca59832
--- /dev/null
+++ b/gas/testsuite/gas/elf/bss-subsect.d
@@ -0,0 +1,11 @@
+#name: .bss <subsection>
+#as: --no-pad-sections
+#readelf: -S --wide
+
+There are [0-9]+ section headers, starting at offset 0x[0-9a-f]+:
+
+Section Headers:
+ +\[Nr\] Name +Type +Addr(ess|) +Off +Size .*
+#...
+ *\[ [1-9]\] *\.bss +NOBITS +0*0 +0[0-9a-f]* 0*a .*
+#pass
diff --git a/gas/testsuite/gas/elf/bss-subsect.s b/gas/testsuite/gas/elf/bss-subsect.s
new file mode 100644
index 0000000..b3de5b8d
--- /dev/null
+++ b/gas/testsuite/gas/elf/bss-subsect.s
@@ -0,0 +1,10 @@
+	.bss
+	.byte 0
+
+	.bss 2
+	.balign 2
+	.skip 2
+
+	.bss 1
+	.balign 4
+	.skip 4
diff --git a/gas/testsuite/gas/elf/elf.exp b/gas/testsuite/gas/elf/elf.exp
index a21dbcc..88ef09c 100644
--- a/gas/testsuite/gas/elf/elf.exp
+++ b/gas/testsuite/gas/elf/elf.exp
@@ -336,6 +336,13 @@ if { [is_elf_format] } then {
 
     run_dump_test "pr25917"
     run_dump_test "bss"
+    # Some targets treat .bss similar to .lcomm.
+    if { ![istarget "csky-*-*"]
+	 && ![istarget "mcore-*-*"]
+	 && ![istarget "spu-*-*"] } then {
+	run_dump_test "bss-prev" $dump_opts
+	run_dump_test "bss-subsect" $dump_opts
+    }
     run_dump_test "bad-bss"
     run_dump_test "bad-section-flag"
     run_dump_test "bad-size"