From 678fa7ffe38b1ad0df779ed1129c1eae3d8f3c5e Mon Sep 17 00:00:00 2001
From: Ron Unrau <runrau@cygnus>
Date: Sun, 15 Feb 1998 21:30:02 +0000
Subject: [PATCH] parse.c (write_dollar_variable): call new function
 target_map_name_to_register 	so that targets can define their own register
 name aliases. infcmd.c (registers_info): call target_map_name_to_register so
 that 	"print $reg" and "info reg $reg" share the same register alias set.
 mips-tdep.c: separate MIPS_R5900_REGS from NUM_REGS so that sky registers 
 can be printed separately. txvu-tdep.c: print registers according to current
 CPU context. tm-txvu.h: define SKY registers and conditionalize register
 interpretation 	macros. txvu.mt: Don't bother building remote-mips.o
 for sky target.

---
 gdb/ChangeLog |  8 ++++++++
 gdb/parse.c   | 50 +++++++++++++++++++++++++++++++++++++-------------
 2 files changed, 45 insertions(+), 13 deletions(-)

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 6acd36ad32..5cdb1e91a9 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,11 @@
+Sun Feb 15 16:10:50 1998  Ron Unrau   <runrau@cygnus.com>
+
+	* parse.c (write_dollar_variable): call new function 
+	  target_map_name_to_register to allow targets to define their own 
+	  register name aliases.
+	* infcmd.c (registers_info): use target_map_name_to_register so that
+	  "print $reg" and "info reg $reg" use the same register name aliases.
+
 Fri Feb 13 16:40:30 1998  Stan Shebs  <shebs@andros.cygnus.com>
 
 	* config/i386/i386mk.mt (OBJFORMATS): Delete, no longer used.
diff --git a/gdb/parse.c b/gdb/parse.c
index 99f0b2719a..f7f5d1d71b 100644
--- a/gdb/parse.c
+++ b/gdb/parse.c
@@ -101,6 +101,40 @@ unsigned num_std_regs = (sizeof std_regs / sizeof std_regs[0]);
 
 #endif
 
+/* The generic method for targets to specify how their registers are named.
+   The mapping can be derived from three sources: reg_names; std_regs; or
+   a target specific alias hook. */
+
+int
+target_map_name_to_register (str, len)
+     char *str;
+     int len;
+{
+  int i;
+
+  /* First search architectural register name space. */
+  for (i = 0; i < NUM_REGS; i++)
+    if (reg_names[i] && len == strlen (reg_names[i])
+	&& STREQN (str, reg_names[i], len))
+      {
+	return i;
+      }
+
+  /* Try standard aliases */
+  for (i = 0; i < num_std_regs; i++)
+    if (std_regs[i].name && len == strlen (std_regs[i].name)
+	&& STREQN (str, std_regs[i].name, len))
+      {
+	return std_regs[i].regnum;
+      }
+
+  /* Try target specific aliases */
+#ifdef REGISTER_NAME_ALIAS_HOOK
+  return REGISTER_NAME_ALIAS_HOOK (str, len);
+#endif
+
+  return -1;
+}
 
 /* Begin counting arguments for a function call,
    saving the data about any containing call.  */
@@ -455,19 +489,9 @@ write_dollar_variable (str)
   
   /* Handle tokens that refer to machine registers:
      $ followed by a register name.  */
-  for (i = 0; i < NUM_REGS; i++)
-    if (reg_names[i] && str.length - 1 == strlen (reg_names[i])
-	&& STREQN (str.ptr + 1, reg_names[i], str.length - 1))
-      {
-	goto handle_register;
-      }
-  for (i = 0; i < num_std_regs; i++)
-    if (std_regs[i].name && str.length - 1 == strlen (std_regs[i].name)
-	&& STREQN (str.ptr + 1, std_regs[i].name, str.length - 1))
-      {
-	i = std_regs[i].regnum;
-	goto handle_register;
-      }
+  i = target_map_name_to_register( str.ptr + 1, str.length - 1 );
+  if( i >= 0 )
+    goto handle_register;
 
   /* Any other names starting in $ are debugger internal variables.  */