[RFC PATCH 1/2] gdb, opcodes: Add non-enum disassembler options

[Tsukasa OI]

This commit makes `NULL' value of disasm_option_arg_t.values which
allows arbitrary (non-enum) disassembler options.

gdb/ChangeLog:

	* gdb/disasm.c (set_disassembler_options): Add arbitrary non-
	enum disassembler options.
	(show_disassembler_options_sfunc): Add support for arbitrary
	non-enum disassembler options.

include/ChangeLog:

	* dis-asm.h (disasm_option_arg_t): Update comment of `values'
	to allow arbitrary non-enum disassembler options.

opcodes/ChangeLog:

	* riscv-dis.c (print_riscv_disassembler_options): Support
	arbitrary non-enum disassembler options on printing help string.
	* arc-dis.c (print_arc_disassembler_options): Likewise.
	* mips-dis.c (print_mips_disassembler_options): Likewise.
---
 gdb/disasm.c        | 4 ++++
 include/dis-asm.h   | 3 ++-
 opcodes/arc-dis.c   | 2 ++
 opcodes/mips-dis.c  | 2 ++
 opcodes/riscv-dis.c | 2 ++
 5 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/gdb/disasm.c b/gdb/disasm.c
index 5cd1f5adbd2..eb7e2fec9fe 100644
--- a/gdb/disasm.c
+++ b/gdb/disasm.c
@@ -1009,6 +1009,8 @@ set_disassembler_options (const char *prospective_options)
 	    if (memcmp (opt, valid_options->name[i], len) != 0)
 	      continue;
 	    arg = opt + len;
+	    if (valid_options->arg[i]->values == NULL)
+	      break;
 	    for (j = 0; valid_options->arg[i]->values[j] != NULL; j++)
 	      if (disassembler_options_cmp
 		    (arg, valid_options->arg[i]->values[j]) == 0)
@@ -1130,6 +1132,8 @@ The following disassembler options are supported for use with the\n\
 
       for (i = 0; valid_args[i].name != NULL; i++)
 	{
+	  if (valid_args[i].values == NULL)
+	    continue;
 	  fprintf_filtered (file, _("\n\
   For the options above, the following values are supported for \"%s\":\n   "),
 			    valid_args[i].name);
diff --git a/include/dis-asm.h b/include/dis-asm.h
index 317592448a2..1826fe97ba7 100644
--- a/include/dis-asm.h
+++ b/include/dis-asm.h
@@ -239,7 +239,8 @@ typedef struct
   /* Option argument name to use in descriptions.  */
   const char *name;
 
-  /* Vector of acceptable option argument values, NULL-terminated.  */
+  /* Vector of acceptable option argument values, NULL-terminated.
+     NULL if any values are accepted.  */
   const char **values;
 } disasm_option_arg_t;
 
diff --git a/opcodes/arc-dis.c b/opcodes/arc-dis.c
index 771f786d18e..41371967c3b 100644
--- a/opcodes/arc-dis.c
+++ b/opcodes/arc-dis.c
@@ -1555,6 +1555,8 @@ print_arc_disassembler_options (FILE *stream)
   for (i = 0; args[i].name != NULL; ++i)
     {
       size_t len = 3;
+      if (args[i].values == NULL)
+	continue;
       fprintf (stream, _("\n\
   For the options above, the following values are supported for \"%s\":\n   "),
 	       args[i].name);
diff --git a/opcodes/mips-dis.c b/opcodes/mips-dis.c
index 9db604ffb39..faeebccfc3b 100644
--- a/opcodes/mips-dis.c
+++ b/opcodes/mips-dis.c
@@ -2809,6 +2809,8 @@ with the -M switch (multiple options should be separated by commas):\n\n"));
 
   for (i = 0; args[i].name != NULL; i++)
     {
+      if (args[i].values == NULL)
+	continue;
       fprintf (stream, _("\n\
   For the options above, the following values are supported for \"%s\":\n   "),
 	       args[i].name);
diff --git a/opcodes/riscv-dis.c b/opcodes/riscv-dis.c
index 34724d4aec5..13ddff01c52 100644
--- a/opcodes/riscv-dis.c
+++ b/opcodes/riscv-dis.c
@@ -1132,6 +1132,8 @@ with the -M switch (multiple options should be separated by commas):\n"));
 
   for (i = 0; args[i].name != NULL; i++)
     {
+      if (args[i].values == NULL)
+	continue;
       fprintf (stream, _("\n\
   For the options above, the following values are supported for \"%s\":\n   "),
 	       args[i].name);
-- 
2.32.0