Add -M command line switch to objdump - text of switch is passed on to disassembler

Add support for register name set selection ot ARM disassembler.

binutils/ChangeLog

@@ -1,3 +1,17 @@
+1999-06-14  Nick Clifton  <nickc@cygnus.com>
+
+	* objdump.c (disassembler_options): New variable.
+	(usage): Document new -M/--disassembler-options option.
+	(long_options): Add --disassembler-options.
+	(disassemble_data): Initialise disassembler_options field of
+	disassembler_info structure.
+	(main): Add parsing of -M option.
+	
+	* binutils.texi: Document new command line switch to objdump.
+
+	* NEWS: Describe new command line switch to objdump.
+
+
 Mon Jun 14 10:27:54 1999  Andreas Schwab  <schwab@issan.cs.uni-dortmund.de>
 
 	* binutils.texi: Fix typos.

binutils/NEWS

@@ -2,6 +2,11 @@
 
 Changes in binutils 2.10:
 
+* New command line switch to objdump -M (or --disassembler-options) which takes
+  a parameter which can then be interpreted on a per-target basis by the
+  disassembler.  Used by ARM targets to select register name sets, ISA, APCS or
+  raw verions.
+  
 * objdump support for -mi386:intel which causes disassembly to be displayed
   with intel syntax.
 

binutils/binutils.texi

@@ -1137,6 +1137,7 @@ objdump [ -a | --archive-headers ]
         [ -j @var{section} | --section=@var{section} ]
         [ -l | --line-numbers ] [ -S | --source ]
         [ -m @var{machine} | --architecture=@var{machine} ]
+        [ -M @var{options} | --disassembler-options=@var{options}]
         [ -p | --private-headers ]
         [ -r | --reloc ] [ -R | --dynamic-reloc ]
         [ -s | --full-contents ]  [ --stabs ]
@@ -1295,6 +1296,21 @@ 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 @samp{-i} option.
 
+@item -M @var{options}
+@itemx --disassembler-options=@var{options}
+Pass target specific information to the disassembler.  Only supported on
+some targets.
+
+If the target is an ARM architecture then this switch can be used to
+select which register name set is used during disassembler.  Specifying
+@samp{--disassembler-options=reg-name-std} (the default) will select the
+register names as used in ARM's instruction set documentation, but with
+register 13 called 'sp', register 14 called 'lr' and register 15 called
+'pc'.  Specifying @samp{--disassembler-options=reg-names-apcs} will
+select the name set used by the ARM Procedure Call Standard, whilst
+specifying @samp{--disassembler-options=reg-names-raw} will just use
+@samp{r} followed by the register number.
+
 @item -p
 @itemx --private-headers
 Print information that is specific to the object file format.  The exact

binutils/objdump.c

@@ -83,6 +83,9 @@ struct objdump_disasm_info {
 /* Architecture to disassemble for, or default if NULL.  */
 static char *machine = (char *) NULL;
 
+/* Target specific options to the disassembler.  */
+static char *disassembler_options = (char *) NULL;
+
 /* Endianness to disassemble for, or default if BFD_ENDIAN_UNKNOWN.  */
 static enum bfd_endian endian = BFD_ENDIAN_UNKNOWN;
 
@@ -217,7 +220,8 @@ usage (stream, status)
      int status;
 {
   fprintf (stream, _("\
-Usage: %s [-ahifCdDprRtTxsSlw] [-b bfdname] [-m machine] [-j section-name]\n\
+Usage: %s [-ahifCdDprRtTxsSlw] [-b bfdname] [-m machine] \n\
+       [-j section-name] [-M disassembler-options]\n\
        [--archive-headers] [--target=bfdname] [--debugging] [--disassemble]\n\
        [--disassemble-all] [--disassemble-zeroes] [--file-headers]\n\
        [--section-headers] [--headers]\n\
@@ -255,6 +259,7 @@ static struct option long_options[]=
   {"demangle", no_argument, &do_demangle, 1},
   {"disassemble", no_argument, NULL, 'd'},
   {"disassemble-all", no_argument, NULL, 'D'},
+  {"disassembler-options", required_argument, NULL, 'M'},
   {"disassemble-zeroes", no_argument, &disassemble_zeroes, 1},
   {"dynamic-reloc", no_argument, NULL, 'R'},
   {"dynamic-syms", no_argument, NULL, 'T'},
@@ -1564,6 +1569,8 @@ disassemble_data (abfd)
   disasm_info.flavour = bfd_get_flavour (abfd);
   disasm_info.arch = bfd_get_arch (abfd);
   disasm_info.mach = bfd_get_mach (abfd);
+  disasm_info.disassembler_options = disassembler_options;
+  
   if (bfd_big_endian (abfd))
     disasm_info.display_endian = disasm_info.endian = BFD_ENDIAN_BIG;
   else if (bfd_little_endian (abfd))
@@ -2694,7 +2701,7 @@ main (argc, argv)
   bfd_init ();
   set_default_bfd_target ();
 
-  while ((c = getopt_long (argc, argv, "pib:m:VCdDlfahrRtTxsSj:wE:",
+  while ((c = getopt_long (argc, argv, "pib:m:M:VCdDlfahrRtTxsSj:wE:",
 			   long_options, (int *) 0))
 	 != EOF)
     {
@@ -2707,6 +2714,9 @@ main (argc, argv)
 	case 'm':
 	  machine = optarg;
 	  break;
+	case 'M':
+	  disassembler_options = optarg;
+	  break;
 	case 'j':
 	  only = optarg;
 	  break;