mbind gas tests and supports_gnu_osabi testsuite infrastructure

With the addition of section16 tests we have multiple tests
advertising themselves as "mbind sections" and "mbind section
contents".  This patch fixes that, and fails on quite a few targets
that force an OSABI value.  It's a pain specifying all the relevant
arm targets on an xfail line, so I wrote supports_gnu_osabi.

binutils/
	* testsuite/lib/binutils-common.exp (match_target): Accept '!' before
	TCL procedure.
	(supports_gnu_osabi): New procedure.
	(is_generic): New, from ld-lib.exp.
	(supports_gnu_unique): Use the above.
gas/
	* testsuite/gas/elf/section12a.d: Use supports_gnu_osabi in
	xfail, and rename test.
	* testsuite/gas/elf/section12b.d: Likewise.
	* testsuite/gas/elf/section16a.d: Likewise.
	* testsuite/gas/elf/section16b.d: Likewise.
ld/
	* testsuite/lib/ld-lib.exp (is_generic): Delete.
	* testsuite/ld-unique/unique.exp: Exclude tic6x.

binutils/ChangeLog

@@ -1,3 +1,11 @@
+2020-02-06  Alan Modra  <amodra@gmail.com>
+
+	* testsuite/lib/binutils-common.exp (match_target): Accept '!' before
+	TCL procedure.
+	(supports_gnu_osabi): New procedure.
+	(is_generic): New, from ld-lib.exp.
+	(supports_gnu_unique): Use the above.
+
 2020-02-04  Alan Modra  <amodra@gmail.com>
 
 	* Makefile.am (CFILES): Add od-elf32_avr.c.

binutils/testsuite/lib/binutils-common.exp

@@ -171,32 +171,38 @@ proc is_rela { binary_file } {
 # in square brackets or as machine triplet otherwise.
 #
 proc match_target { target } {
-   if [string match {\[*\]} $target] {
+   if [regexp {^!?\[.*\]$} $target] {
 	return $target
    } else {
 	return [istarget $target]
    }
 }
 
-# True if the ELF target supports STB_GNU_UNIQUE with the ELF header's
+# True if the ELF target supports setting the ELF header OSABI field
-# OSABI field set to ELFOSABI_GNU.
+# to ELFOSABI_GNU or ELFOSABI_FREEBSD, a requirement for STT_GNU_IFUNC
+# symbol and SHF_GNU_MBIND section support.
 #
 # This generally depends on the target OS only, however there are a
 # number of exceptions for bare metal targets as follows.  The MSP430
-# and Visium targets set OSABI to ELFOSABI_STANDALONE and cannot
+# and Visium targets set OSABI to ELFOSABI_STANDALONE.  Likewise
-# support STB_GNU_UNIQUE.  Likewise non-EABI ARM targets set OSABI to
+# non-EABI ARM targets set OSABI to ELFOSABI_ARM
-# ELFOSABI_ARM, and TI C6X targets to ELFOSABI_C6000_*.  Finally
-# rather than `bfd_elf_final_link' a number of targets use
-# `_bfd_generic_final_link', which does not support STB_GNU_UNIQUE
-# symbol binding causing assertion failures.
 #
-proc supports_gnu_unique {} {
+# Note that some TI C6X targets use ELFOSABI_C6000_* but one doesn't,
+# so we don't try to sort out tic6x here.  (The effect is that linker
+# testcases will generally need to exclude tic6x or use a -m option.)
+#
+proc supports_gnu_osabi {} {
     if { [istarget *-*-gnu*]
 	 || [istarget *-*-linux*]
-	 || [istarget *-*-nacl*] } {
+	 || [istarget *-*-nacl*]
-	return 1
+	 || ( [istarget *-*-*bsd*] && ![istarget arm*-*-netbsd*] )
-    }
+	 || [istarget *-*-symbianelf]
-    if { [istarget "arm*-*-*eabi*"] } {
+	 || [istarget *-*-lynxos]
+	 || ( [istarget *-*-nto*] && ![istarget arm*-*-*] )
+	 || [istarget *-*-irix*]
+	 || [istarget *-*-*eabi*]
+	 || [istarget *-*-rtems*]
+	 || [istarget *-*-solaris*] } {
 	return 1
     }
     if { [istarget "wasm32*-*-*"] } {
@@ -207,19 +213,36 @@ proc supports_gnu_unique {} {
     }
     if { [istarget "arm*-*-*"]
 	 || [istarget "msp430-*-*"]
-	 || [istarget "tic6x-*-*"]
 	 || [istarget "visium-*-*"] } {
 	return 0
     }
-    if { [istarget "am33_2.0-*-*"]
+    return 1
-	 || [istarget "d30v-*-*"]
+}
+
+# Return true if target uses the generic_link_hash_table linker.
+proc is_generic { } {
+    if { [istarget "d30v-*-*"]
 	 || [istarget "dlx-*-*"]
 	 || [istarget "pj*-*-*"]
 	 || [istarget "s12z-*-*"]
 	 || [istarget "xgate-*-*"] } {
+	return 1
+    }
+    return 0
+}
+
+# True if the ELF target supports STB_GNU_UNIQUE.
+#
+# This require ELFOSABI_GNU, and `bfd_elf_final_link'.
+#
+proc supports_gnu_unique {} {
+    if { [istarget *-*-freebsd*] } {
 	return 0
     }
-    return 1
+    if { [supports_gnu_osabi] && ![is_generic] } {
+	return 1
+    }
+    return 0
 }
 
 # True for targets that do not sort .symtab as per the ELF standard.

gas/ChangeLog

@@ -1,3 +1,11 @@
+2020-02-06  Alan Modra  <amodra@gmail.com>
+
+	* testsuite/gas/elf/section12a.d: Use supports_gnu_osabi in
+	xfail, and rename test.
+	* testsuite/gas/elf/section12b.d: Likewise.
+	* testsuite/gas/elf/section16a.d: Likewise.
+	* testsuite/gas/elf/section16b.d: Likewise.
+
 2020-02-02  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR gas/25380

gas/testsuite/gas/elf/section12a.d

@@ -1,10 +1,9 @@
 #source: section12.s
 #as: --no-pad-sections
 #readelf: -Sg --wide
-#name: mbind sections
+#name: mbind sections 12
 # A number of targets do not support SHF_GNU_MBIND
-#xfail: arm*-*-netbsdelf* arm*-*-nto* msp430-*-* visium-*-*
+#xfail: ![supports_gnu_osabi]
-#xfail: *-*-hpux* *-*-cloudabi
 
 #...
   \[[ 0-9]+\] \.mbind\.data[ 	]+PROGBITS[ 	]+0+0 0+[0-9a-f]+ 0+1 00 WAD  0   0  1

gas/testsuite/gas/elf/section12b.d

@@ -1,13 +1,12 @@
 #source: section12.s
 #as: --no-pad-sections
 #objdump: -s
-#name: mbind section contents
+#name: mbind section contents 16
 # RX annoyingly reorders the sections so that they do not match the sequence
 # expected below.
 #xfail: rx-*-*
 # A number of targets do not support SHF_GNU_MBIND
-#xfail: arm*-*-netbsdelf* arm*-*-nto* msp430-*-* visium-*-*
+#xfail: ![supports_gnu_osabi]
-#xfail: *-*-hpux* *-*-cloudabi
 
 #...
 Contents of section .mbind.data:

gas/testsuite/gas/elf/section16a.d

@@ -1,10 +1,9 @@
 #source: section16.s
 #as: --no-pad-sections
 #readelf: -Sg --wide
-#name: mbind sections
+#name: mbind sections 16
 # A number of targets do not support SHF_GNU_MBIND
-#xfail: arm*-*-netbsdelf* arm*-*-nto* msp430-*-* visium-*-*
+#xfail: ![supports_gnu_osabi]
-#xfail: *-*-hpux* *-*-cloudabi
 
 #...
   \[[ 0-9]+\] \.mbind\.data[ 	]+PROGBITS[ 	]+0+0 0+[0-9a-f]+ 0+1 00 WAD  0   0  1

gas/testsuite/gas/elf/section16b.d

@@ -1,13 +1,12 @@
 #source: section16.s
 #as: --no-pad-sections
 #objdump: -s
-#name: mbind section contents
+#name: mbind section contents 16
 # RX annoyingly reorders the sections so that they do not match the sequence
 # expected below.
 #xfail: rx-*-*
 # A number of targets do not support SHF_GNU_MBIND
-#xfail: arm*-*-netbsdelf* arm*-*-nto* msp430-*-* visium-*-*
+#xfail: ![supports_gnu_osabi]
-#xfail: *-*-hpux* *-*-cloudabi
 
 #...
 Contents of section .mbind.data:

ld/ChangeLog

@@ -1,3 +1,8 @@
+2020-02-06  Alan Modra  <amodra@gmail.com>
+
+	* testsuite/lib/ld-lib.exp (is_generic): Delete.
+	* testsuite/ld-unique/unique.exp: Exclude tic6x.
+
 2020-02-06  Alan Modra  <amodra@gmail.com>
 
 	* configure.tgt (i[3-7]86-*-moss*): Don't clear targ_extra_ofiles.

ld/testsuite/ld-unique/unique.exp

@@ -30,7 +30,7 @@ if { ![is_elf_format] } {
 }
 
 # Require STB_GNU_UNIQUE support with OSABI set to GNU.
-if { ![supports_gnu_unique] } {
+if { ![supports_gnu_unique] || [istarget tic6x-*-*] } {
     verbose "UNIQUE tests not run - target does not support UNIQUE"
     return
 }

ld/testsuite/lib/ld-lib.exp

@@ -1088,18 +1088,6 @@ proc check_gc_sections_available { } {
     return $gc_sections_available_saved
 }
 
-# Return true if target uses the generic_link_hash_table linker.
-proc is_generic { } {
-    if { [istarget "d30v-*-*"]
-	 || [istarget "dlx-*-*"]
-	 || [istarget "pj*-*-*"]
-	 || [istarget "s12z-*-*"]
-	 || [istarget "xgate-*-*"] } {
-	return 1
-    }
-    return 0
-}
-
 # Return true if target uses genelf.em.
 proc uses_genelf { } {
     if { [istarget "d30v-*-*"]