* remote.c (remote_write_bytes): Add default case to switch

[deliverable/binutils-gdb.git] / gdb / regcache.c

diff --git a/gdb/regcache.c b/gdb/regcache.c
index f449189795e10c8e5fbdc0c62dd3539231f484b0..104bff7b179d2e7938572bbe18058f27a48a2f8b 100644 (file)
--- a/gdb/regcache.c
+++ b/gdb/regcache.c
@@ -24,6 +24,7 @@
 #include "inferior.h"
 #include "target.h"
 #include "gdbarch.h"
+#include "gdbcmd.h"
 
 /*
  * DATA STRUCTURE
@@ -68,6 +69,15 @@ register_cached (int regnum)
   return register_valid[regnum];
 }
 
+/* REGISTER_CHANGED
+
+   invalidate a single register REGNUM in the cache */
+void
+register_changed (int regnum)
+{
+  register_valid[regnum] = 0;
+}
+
 /* FIND_SAVED_REGISTER ()
 
    Return the address in which frame FRAME's value of register REGNUM
@@ -381,7 +391,14 @@ read_register_bytes (int inregbyte, char *myaddr, int inlen)
        FETCH_PSEUDO_REGISTER (regno);
 
       if (!register_valid[regno])
-       error ("read_register_bytes:  Couldn't update register %d.", regno);
+       {
+         /* Sometimes pseudoregs are never marked valid, so that they 
+            will be fetched every time (it can be complicated to know
+            if a pseudoreg is valid, while "fetching" them can be cheap). 
+            */
+         if (regno < NUM_REGS)
+           error ("read_register_bytes:  Couldn't update register %d.", regno);
+       }
     }
 
   if (myaddr != NULL)
@@ -707,7 +724,7 @@ supply_register (int regno, char *val)
    Ditto for write_pc.
 
    1999-06-08: The following were re-written so that it assumes the
-   existance of a TARGET_READ_PC et.al. macro.  A default generic
+   existence of a TARGET_READ_PC et.al. macro.  A default generic
    version of that macro is made available where needed.
 
    Since the ``TARGET_READ_PC'' et.al. macro is going to be controlled
@@ -715,10 +732,6 @@ supply_register (int regno, char *val)
    eliminate the intermediate read_pc_pid().  The client would call
    TARGET_READ_PC directly. (cagney). */
 
-#ifndef TARGET_READ_PC
-#define TARGET_READ_PC generic_target_read_pc
-#endif
-
 CORE_ADDR
 generic_target_read_pc (int pid)
 {
@@ -755,10 +768,6 @@ read_pc (void)
   return read_pc_pid (inferior_pid);
 }
 
-#ifndef TARGET_WRITE_PC
-#define TARGET_WRITE_PC generic_target_write_pc
-#endif
-
 void
 generic_target_write_pc (CORE_ADDR pc, int pid)
 {
@@ -796,10 +805,6 @@ write_pc (CORE_ADDR pc)
 
 /* Cope with strage ways of getting to the stack and frame pointers */
 
-#ifndef TARGET_READ_SP
-#define TARGET_READ_SP generic_target_read_sp
-#endif
-
 CORE_ADDR
 generic_target_read_sp (void)
 {
@@ -816,10 +821,6 @@ read_sp (void)
   return TARGET_READ_SP ();
 }
 
-#ifndef TARGET_WRITE_SP
-#define TARGET_WRITE_SP generic_target_write_sp
-#endif
-
 void
 generic_target_write_sp (CORE_ADDR val)
 {
@@ -839,10 +840,6 @@ write_sp (CORE_ADDR val)
   TARGET_WRITE_SP (val);
 }
 
-#ifndef TARGET_READ_FP
-#define TARGET_READ_FP generic_target_read_fp
-#endif
-
 CORE_ADDR
 generic_target_read_fp (void)
 {
@@ -859,10 +856,6 @@ read_fp (void)
   return TARGET_READ_FP ();
 }
 
-#ifndef TARGET_WRITE_FP
-#define TARGET_WRITE_FP generic_target_write_fp
-#endif
-
 void
 generic_target_write_fp (CORE_ADDR val)
 {
@@ -882,6 +875,17 @@ write_fp (CORE_ADDR val)
   TARGET_WRITE_FP (val);
 }
 
+/* ARGSUSED */
+static void
+reg_flush_command (char *command, int from_tty)
+{
+  /* Force-flush the register cache.  */
+  registers_changed ();
+  if (from_tty)
+    printf_filtered ("Register cache flushed.\n");
+}
+
+
 static void
 build_regcache (void)
 {
@@ -904,4 +908,7 @@ _initialize_regcache (void)
   register_gdbarch_swap (&registers, sizeof (registers), NULL);
   register_gdbarch_swap (&register_valid, sizeof (register_valid), NULL);
   register_gdbarch_swap (NULL, 0, build_regcache);
+
+  add_com ("flushregs", class_maintenance, reg_flush_command,
+          "Force gdb to flush its register cache (maintainer command)");
 }