[RFA] Cleanup SYMBOLS_CAN_START_WITH_DOLLAR

[Randolph Chung <randolph at tausq dot org>]

Ref: http://sources.redhat.com/ml/gdb/2004-11/msg00097.html

Trying to get rid of more of these hppa-only defines....

ok?

randolph

2004-11-12  Randolph Chung  <tausq@debian.org>

	* config/tm/tm-hppa.h (SYMBOLS_CAN_START_WITH_DOLLAR): Remove.
	* parse.c (SYMBOLS_CAN_START_WITH_DOLLAR): Remove.
	(write_exp_msymbol): Remove conditional check for symbols starting 
	with $.  Update comments.

Index: config/pa/tm-hppa.h
===================================================================
RCS file: /cvs/src/src/gdb/config/pa/tm-hppa.h,v
retrieving revision 1.75
diff -u -p -r1.75 tm-hppa.h
--- config/pa/tm-hppa.h	2 Sep 2004 14:17:41 -0000	1.75
+++ config/pa/tm-hppa.h	12 Nov 2004 17:50:26 -0000
@@ -38,9 +38,3 @@ extern int hppa_instruction_nullified (v
 /* Here's how to step off a permanent breakpoint.  */
 #define SKIP_PERMANENT_BREAKPOINT (hppa_skip_permanent_breakpoint)
 extern void hppa_skip_permanent_breakpoint (void);
-
-/* On HP-UX, certain system routines (millicode) have names beginning
-   with $ or $$, e.g. $$dyncall, which handles inter-space procedure
-   calls on PA-RISC.  Tell the expression parser to check for those
-   when parsing tokens that begin with "$".  */
-#define SYMBOLS_CAN_START_WITH_DOLLAR (1)
Index: parse.c
===================================================================
RCS file: /cvs/src/src/gdb/parse.c,v
retrieving revision 1.43
diff -u -p -r1.43 parse.c
--- parse.c	26 Jul 2004 14:53:04 -0000	1.43
+++ parse.c	12 Nov 2004 17:50:26 -0000
@@ -64,21 +64,6 @@ const struct exp_descriptor exp_descript
     evaluate_subexp_standard
   };
 
-/* Symbols which architectures can redefine.  */
-
-/* Some systems have routines whose names start with `$'.  Giving this
-   macro a non-zero value tells GDB's expression parser to check for
-   such routines when parsing tokens that begin with `$'.
-
-   On HP-UX, certain system routines (millicode) have names beginning
-   with `$' or `$$'.  For example, `$$dyncall' is a millicode routine
-   that handles inter-space procedure calls on PA-RISC.  */
-#ifndef SYMBOLS_CAN_START_WITH_DOLLAR
-#define SYMBOLS_CAN_START_WITH_DOLLAR (0)
-#endif
-
-
-
 /* Global variables declared in parser-defs.h (and commented there).  */
 struct expression *expout;
 int expout_size;
@@ -437,6 +422,9 @@ write_exp_msymbol (struct minimal_symbol
 void
 write_dollar_variable (struct stoken str)
 {
+  struct symbol *sym = NULL;
+  struct minimal_symbol *msym = NULL;
+
   /* Handle the tokens $digits; also $ (short for $0) and $$ (short for $$1)
      and $$digits (equivalent to $<-digits> if you could type that). */
 
@@ -474,36 +462,26 @@ write_dollar_variable (struct stoken str
   if (i >= 0)
     goto handle_register;
 
-  if (SYMBOLS_CAN_START_WITH_DOLLAR)
-    {
-      struct symbol *sym = NULL;
-      struct minimal_symbol *msym = NULL;
+  /* On some systems, such as HP-UX and hppa-linux, certain system routines 
+     have names beginning with $ or $$.  Check for those, first. */
 
-      /* On HP-UX, certain system routines (millicode) have names beginning
-	 with $ or $$, e.g. $$dyncall, which handles inter-space procedure
-	 calls on PA-RISC. Check for those, first. */
-
-      /* This code is not enabled on non HP-UX systems, since worst case 
-	 symbol table lookup performance is awful, to put it mildly. */
-
-      sym = lookup_symbol (copy_name (str), (struct block *) NULL,
-			   VAR_DOMAIN, (int *) NULL, (struct symtab **) NULL);
-      if (sym)
-	{
-	  write_exp_elt_opcode (OP_VAR_VALUE);
-	  write_exp_elt_block (block_found);	/* set by lookup_symbol */
-	  write_exp_elt_sym (sym);
-	  write_exp_elt_opcode (OP_VAR_VALUE);
-	  return;
-	}
-      msym = lookup_minimal_symbol (copy_name (str), NULL, NULL);
-      if (msym)
-	{
-	  write_exp_msymbol (msym,
-			     lookup_function_type (builtin_type_int),
-			     builtin_type_int);
-	  return;
-	}
+  sym = lookup_symbol (copy_name (str), (struct block *) NULL,
+		       VAR_DOMAIN, (int *) NULL, (struct symtab **) NULL);
+  if (sym)
+    {
+      write_exp_elt_opcode (OP_VAR_VALUE);
+      write_exp_elt_block (block_found);	/* set by lookup_symbol */
+      write_exp_elt_sym (sym);
+      write_exp_elt_opcode (OP_VAR_VALUE);
+      return;
+    }
+  msym = lookup_minimal_symbol (copy_name (str), NULL, NULL);
+  if (msym)
+    {
+      write_exp_msymbol (msym,
+			 lookup_function_type (builtin_type_int),
+			 builtin_type_int);
+      return;
     }
 
   /* Any other names starting in $ are debugger internal variables.  */
-- 
Randolph Chung
Debian GNU/Linux Developer, hppa/ia64 ports
http://www.tausq.org/