backends: Add support for EM_PPC64 GNU_ATTRIBUTES.

ppc64 and ppc64le ELF files can also contain a power specific
.gnu.attributes section. Add support for those and recognize the new
GNU_Power_ABI_FP Single-precision hard float value.

Signed-off-by: Mark Wielaard <mark@klomp.org>

backends/ChangeLog

@@ -1,3 +1,9 @@
+2017-02-15  Mark Wielaard  <mark@klomp.org>
+
+	* ppc64_init.c (ppc64_init): Add check_object_attribute HOOK.
+	* ppc_attrs.c (ppc_check_object_attribute): Add Single-precision hard
+	float.
+
 2016-11-02  Mark Wielaard  <mjw@redhat.com>
 
 	* i386_regs.c (i386_register_info): Add fallthrough comment.

backends/ppc64_init.c

@@ -67,6 +67,7 @@ ppc64_init (Elf *elf __attribute__ ((unused)),
   HOOK (eh, syscall_abi);
   HOOK (eh, core_note);
   HOOK (eh, auxv_info);
+  HOOK (eh, check_object_attribute);
   HOOK (eh, abi_cfi);
   /* gcc/config/ #define DWARF_FRAME_REGISTERS.  */
   eh->frame_nregs = (114 - 1) + 32;

backends/ppc_attrs.c

@@ -51,6 +51,7 @@ ppc_check_object_attribute (Ebl *ebl __attribute__ ((unused)),
 	    "Hard or soft float",
 	    "Hard float",
 	    "Soft float",
+	    "Single-precision hard float",
 	  };
 	if (value < sizeof fp_kinds / sizeof fp_kinds[0])
 	  *value_name = fp_kinds[value];

tests/ChangeLog

@@ -1,3 +1,8 @@
+2017-02-15  Mark Wielaard  <mark@klomp.org>
+
+	* Makefile.am (EXTRA_DIST): Add testfileppc64attrs.o.bz2.
+	* run-readelf-A.sh: Add testfileppc64.o test.
+
 2017-02-15  Ulf Hermann  <ulf.hermann@qt.io>
 
 	* elfstrmerge.c: Include system.h.

tests/Makefile.am

@@ -1,6 +1,6 @@
 ## Process this file with automake to create Makefile.in
 ##
-## Copyright (C) 1996-2016 Red Hat, Inc.
+## Copyright (C) 1996-2017 Red Hat, Inc.
 ## This file is part of elfutils.
 ##
 ## This file is free software; you can redistribute it and/or modify
@@ -317,7 +317,7 @@ EXTRA_DIST = run-arextract.sh run-arsymtest.sh \
 	     run-aggregate-size.sh testfile-sizes1.o.bz2 testfile-sizes2.o.bz2 \
 	     testfile-sizes3.o.bz2 \
 	     run-readelf-A.sh testfileppc32attrs.o.bz2 \
-	     testfilesparc64attrs.o.bz2 \
+	     testfilesparc64attrs.o.bz2 testfileppc64attrs.o.bz2 \
 	     testfile-debug-types.bz2 \
 	     run-getsrc-die.sh run-strptr.sh \
 	     testfile-x32-core.bz2 testfile-x32.bz2 \

tests/run-readelf-A.sh

@@ -32,7 +32,12 @@
 #
 # gcc -c testfilesparc64attrs.s
 
-testfiles testfilearm testfileppc32attrs.o testfilesparc64attrs.o
+# = testfileppc64attrs.s =
+# .gnu_attribute 4,3
+#
+# gcc -c testfileppc64attrs.s
+
+testfiles testfilearm testfileppc32attrs.o testfilesparc64attrs.o testfileppc64attrs.o
 
 testrun_compare ${abs_top_builddir}/src/readelf -A testfilearm <<\EOF
 
@@ -79,4 +84,13 @@ Object attributes section [ 4] '.gnu.attributes' of 21 bytes at offset 0x40:
       GNU_Sparc_HWCAPS2: fjathplus,adp,mwait,xmont
 EOF
 
+testrun_compare ${abs_top_builddir}/src/readelf -A testfileppc64attrs.o <<\EOF
+
+Object attributes section [ 4] '.gnu.attributes' of 16 bytes at offset 0x40:
+  Owner          Size
+  gnu              15
+    File:           7
+      GNU_Power_ABI_FP: Single-precision hard float
+EOF
+
 exit 0