PR 10288

        * arm-dis.c (print_insn_coprocessor): Check that a user specified
        ARM architecture supports the matched instruction.
        (print_insn_arm): Likewise.
        (select_arm_features): New function.  Fills in the fields of an
        arm_feature_set structure based on a given arm machine number.
        (print_insn): Initialise an arm_feature_set structure.

        * objdump.c (disassemble_bytes): Set the
        USER_SPECIFIED_MACHINE_TYPE flag in the disassemble_info structure
        if the user has invoked the -m switch.
        * doc/binutils.texi: Document the additional behaviour of
        objdump's -m switch for ARM targets.

        * dis-asm.h (USER_SPECIFIED_MACHINE_TYPE): New value for the flags
        field of struct disassemble_info.

        * gas/arm/align.s: Add labels so that COFF based targets can
        correctly locate THUMB code.
        * gas/arm/copro.d: Do not pass --architecture switch to objdump.

3 files changed, 25 insertions, 2 deletions

diff --git a/binutils/ChangeLog b/binutils/ChangeLog
index f7974f706ef..ddacde192fa 100644
--- a/binutils/ChangeLog
+++ b/binutils/ChangeLog
@@ -1,8 +1,18 @@
+2009-06-18  Nick Clifton  <nickc@redhat.com>
+
+	PR 10288
+	* objdump.c (disassemble_bytes): Set the
+	USER_SPECIFIED_MACHINE_TYPE flag in the disassemble_info structure
+	if the user has invoked the -m switch.
+	* doc/binutils.texi: Document the additional behaviour of
+	objdump's -m switch for ARM targets.
+
 2009-06-18  Dave Korn  <dave.korn.cygwin@gmail.com>
 
-  Merge cegcc and mingw32ce target name changes from CeGCC project.
+	* configure.in: Merge cegcc and mingw32ce target name changes from
+	CeGCC project.
 
-  2007-12-25  Pedro Alves  <pedro_alves@portugalmail.pt>
+2007-12-25  Pedro Alves  <pedro_alves@portugalmail.pt>
 
 	* configure.in: Add arm*-*-cegcc* and arm*-*-mingw32ce* targets.
 	* configure: Regenerate.
diff --git a/binutils/doc/binutils.texi b/binutils/doc/binutils.texi
index 7680c6f3ae7..d74b12b86b2 100644
--- a/binutils/doc/binutils.texi
+++ b/binutils/doc/binutils.texi
@@ -1801,6 +1801,10 @@ expected to contain instructions.
 Like @option{-d}, but disassemble the contents of all sections, not just
 those expected to contain instructions.
 
+If the target is an ARM architecture this switch also has the effect
+of forcing the disassembler to decode pieces of data found in code
+sections as if they were instructions.
+
 @item --prefix-addresses
 When disassembling, print the complete address on each line.  This is
 the older disassembly format.
@@ -1884,6 +1888,13 @@ can be useful when disassembling object files which do not describe
 architecture information, such as S-records.  You can list the available
 architectures with the @option{-i} option.
 
+If the target is an ARM architecture then this switch has an
+additional effect.  It restricts the disassembly to only those
+instructions supported by the architecture specified by @var{machine}.
+If it is necessary to use this switch because the input file does not
+contain any architecture information, but it is also desired to
+disassemble all the instructions use @option{-marm}.
+
 @item -M @var{options}
 @itemx --disassembler-options=@var{options}
 Pass target specific information to the disassembler.  Only supported on
diff --git a/binutils/objdump.c b/binutils/objdump.c
index 3cf03f7eddb..dfe6a57e16e 100644
--- a/binutils/objdump.c
+++ b/binutils/objdump.c
@@ -1526,6 +1526,8 @@ disassemble_bytes (struct disassemble_info * info,
 	      info->bytes_per_line = 0;
 	      info->bytes_per_chunk = 0;
 	      info->flags = disassemble_all ? DISASSEMBLE_DATA : 0;
+	      if (machine)
+		info->flags |= USER_SPECIFIED_MACHINE_TYPE;
 
 	      if (info->disassembler_needs_relocs
 		  && (bfd_get_file_flags (aux->abfd) & EXEC_P) == 0