MIPS/opcodes: Also set disassembler's ASE flags from ELF structures

Respect any ASE flags recorded in ELF file structures for the purpose of
selecting instructions to be disassembled, preventing code from being
hex-dumped even though having been clearly indicated as valid at the
assembly time.  Use date from the MIPS ABI flags structure if present,
and otherwise there may be an MDMX ASE flag set in the ELF file header.
For backwards compatibility only set extra flags and do not clear any,
preserving all previously set by the architecture selected to be
disassembled for.

	include/
	* elf/mips.h (Elf_Internal_ABIFlags_v0): Also declare struct
	typedef as `elf_internal_abiflags_v0'.

	bfd/
	* bfd-in.h (elf_internal_abiflags_v0): New struct declaration.
	(bfd_mips_elf_get_abiflags): New prototype.
	* elfxx-mips.c (bfd_mips_elf_get_abiflags): New function.
	* bfd-in2.h: Regenerate.

	opcodes/
	* mips-dis.c (mips_convert_abiflags_ases): New function.
	(set_default_mips_dis_options): Also infer ASE flags from ELF
	file structures.

	binutils/
	* testsuite/binutils-all/mips/mips-ase-1.d: New test.
	* testsuite/binutils-all/mips/mips-ase-2.d: New test.
	* testsuite/binutils-all/mips/mips-ase-3.d: New test.
	* testsuite/binutils-all/mips/mips-ase-1.s: New test source.
	* testsuite/binutils-all/mips/mips-ase-2.s: New test source.
	* testsuite/binutils-all/mips/mips.exp: Run the new tests.

4 files changed, 25 insertions, 0 deletions

diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index 21cbcac..ded152e 100644
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,3 +1,10 @@
+2016-12-14  Maciej W. Rozycki  <macro@imgtec.com>
+
+	* bfd-in.h (elf_internal_abiflags_v0): New struct declaration.
+	(bfd_mips_elf_get_abiflags): New prototype.
+	* elfxx-mips.c (bfd_mips_elf_get_abiflags): New function.
+	* bfd-in2.h: Regenerate.
+
 2016-12-14  Yury Norov <ynorov@caviumnetworks.com>
 
          * bfd/elfnn-aarch64.c: fix TLS relaxations for ilp32 where
diff --git a/bfd/bfd-in.h b/bfd/bfd-in.h
index 4b3bcfd..14f55ab 100644
--- a/bfd/bfd-in.h
+++ b/bfd/bfd-in.h
@@ -1045,3 +1045,7 @@ extern bfd_boolean v850_elf_create_sections
 
 extern bfd_boolean v850_elf_set_note
   (bfd *, unsigned int, unsigned int);
+
+/* MIPS ABI flags data access.  For the disassembler.  */
+struct elf_internal_abiflags_v0;
+extern struct elf_internal_abiflags_v0 *bfd_mips_elf_get_abiflags (bfd *);
diff --git a/bfd/bfd-in2.h b/bfd/bfd-in2.h
index fdb7878..1c6b70f 100644
--- a/bfd/bfd-in2.h
+++ b/bfd/bfd-in2.h
@@ -1052,6 +1052,10 @@ extern bfd_boolean v850_elf_create_sections
 
 extern bfd_boolean v850_elf_set_note
   (bfd *, unsigned int, unsigned int);
+
+/* MIPS ABI flags data access.  For the disassembler.  */
+struct elf_internal_abiflags_v0;
+extern struct elf_internal_abiflags_v0 *bfd_mips_elf_get_abiflags (bfd *);
 /* Extracted from init.c.  */
 void bfd_init (void);
 
diff --git a/bfd/elfxx-mips.c b/bfd/elfxx-mips.c
index 96317aa..d649676 100644
--- a/bfd/elfxx-mips.c
+++ b/bfd/elfxx-mips.c
@@ -16327,6 +16327,16 @@ _bfd_mips_elf_get_synthetic_symtab (bfd *abfd,
   return n;
 }
 
+/* Return the ABI flags associated with ABFD if available.  */
+
+Elf_Internal_ABIFlags_v0 *
+bfd_mips_elf_get_abiflags (bfd *abfd)
+{
+  struct mips_elf_obj_tdata *tdata = mips_elf_tdata (abfd);
+
+  return tdata->abiflags_valid ? &tdata->abiflags : NULL;
+}
+
 void
 _bfd_mips_post_process_headers (bfd *abfd, struct bfd_link_info *link_info)
 {