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.

2 files changed, 49 insertions, 18 deletions

diff --git a/binutils/ChangeLog b/binutils/ChangeLog
index 6214de9..7dc97db 100644
--- a/binutils/ChangeLog
+++ b/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.
diff --git a/binutils/testsuite/lib/binutils-common.exp b/binutils/testsuite/lib/binutils-common.exp
index a253c01..57b94f5 100644
--- a/binutils/testsuite/lib/binutils-common.exp
+++ b/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
-# OSABI field set to ELFOSABI_GNU.
+# True if the ELF target supports setting the ELF header OSABI field
+# 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
-# support STB_GNU_UNIQUE.  Likewise non-EABI ARM targets set OSABI to
-# 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.
+# and Visium targets set OSABI to ELFOSABI_STANDALONE.  Likewise
+# non-EABI ARM targets set OSABI to ELFOSABI_ARM
 #
-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*] } {
-	return 1
-    }
-    if { [istarget "arm*-*-*eabi*"] } {
+	 || [istarget *-*-nacl*]
+	 || ( [istarget *-*-*bsd*] && ![istarget arm*-*-netbsd*] )
+	 || [istarget *-*-symbianelf]
+	 || [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-*-*"]
-	 || [istarget "d30v-*-*"]
+    return 1
+}
+
+# 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.