[SPARC] Fix PR gas/22738

[Eric Botcazou <ebotcazou at adacore dot com>]

Hi,

the .dc.a directive has wrong size (32 bits) on SPARC 64-bit because the 
assembler sets the correct BFD architecture only at the very end of the 
processing and it's too late for the directive.  It's fixed by defining 
TARGET_MACH and making it return a sensible default value.

This was reported by H.J. very likely because of the failure of PR ld/22450 
and this indeed fixes the failure.  Tested on SPARC64/Linux, OK for mainline?


2018-01-25  Eric Botcazou  <ebotcazou@adacore.com>

gas/
	PR gas/22738
	* config/tc-sparc.h (sparc_mach): Declare.
	(TARGET_MACH): Define to above.
	* config/tc-sparc.c (sparc_mach): New function.
	(sparc_md_end): Minor tweak.


2018-01-25  Eric Botcazou  <ebotcazou@adacore.com>

ld/
	* testsuite/ld-elf/pr22450.d: Remove reference to SPARC64.

-- 
Eric Botcazou

diff --git a/gas/config/tc-sparc.c b/gas/config/tc-sparc.c
index 69a8e5204a..c21192af96 100644
--- a/gas/config/tc-sparc.c
+++ b/gas/config/tc-sparc.c
@@ -325,6 +325,19 @@ init_default_arch (void)
   default_arch_type = sa->arch_type;
 }
 
+/* Called by TARGET_MACH.  */
+
+unsigned long
+sparc_mach (void)
+{
+  /* We don't get a chance to initialize anything before we're called,
+     so handle that now.  */
+  if (! default_init_p)
+    init_default_arch ();
+
+  return sparc_arch_size == 64 ? bfd_mach_sparc_v9 : bfd_mach_sparc;
+}
+
 /* Called by TARGET_FORMAT.  */
 
 const char *
@@ -1148,7 +1161,7 @@ md_begin (void)
 void
 sparc_md_end (void)
 {
-  unsigned long mach = bfd_mach_sparc;
+  unsigned long mach;
 #if defined(OBJ_ELF) && !defined(TE_SOLARIS)
   int hwcaps, hwcaps2;
 #endif
@@ -1182,7 +1195,7 @@ sparc_md_end (void)
       /* The sparclite is treated like a normal sparc.  Perhaps it shouldn't
 	 be but for now it is (since that's the way it's always been
 	 treated).  */
-      default: break;
+      default: mach = bfd_mach_sparc; break;
       }
   bfd_set_arch_mach (stdoutput, bfd_arch_sparc, mach);
 
diff --git a/gas/config/tc-sparc.h b/gas/config/tc-sparc.h
index 7ff7613517..e3db1fb0cc 100644
--- a/gas/config/tc-sparc.h
+++ b/gas/config/tc-sparc.h
@@ -30,6 +30,9 @@ struct frag;
 
 #define TARGET_ARCH bfd_arch_sparc
 
+extern unsigned long sparc_mach (void);
+#define TARGET_MACH sparc_mach ()
+
 #ifdef TE_FreeBSD
 #define ELF_TARGET_FORMAT	"elf32-sparc"
 #define ELF64_TARGET_FORMAT	"elf64-sparc-freebsd"
diff --git a/ld/testsuite/ld-elf/pr22450.d b/ld/testsuite/ld-elf/pr22450.d
index 26853bc9b8..5b219b7795 100644
--- a/ld/testsuite/ld-elf/pr22450.d
+++ b/ld/testsuite/ld-elf/pr22450.d
@@ -2,7 +2,7 @@
 #readelf: --notes --wide
 #ld: -r
 # Fails on H8300 because it does not generate the correct relocs for the size fields.
-# Fails on AVR, IP2K, M68HC11, SPARC64, XC16C because the assembler does not calculate the correct values for the differences of local symbols.
+# Fails on AVR, IP2K, M68HC11, XC16C because the assembler does not calculate the correct values for the differences of local symbols.
 # Fails on CRX because readelf does not know how to apply CRX reloc number 20 (R_CRX_SWITCH32).
 
 #...