/* REGISTER_VALID is 0 if the register needs to be fetched,
1 if it has been fetched, and
-1 if the register value was not available.
- "Not available" means don't try to fetch it again. */
+
+ "Not available" indicates that the target is not not able to supply
+ the register at this state. The register may become available at a
+ later time (after the next resume). This often occures when GDB is
+ manipulating a target that contains only a snapshot of the entire
+ system being debugged - some of the registers in such a system may
+ not have been saved. */
signed char *register_valid;
}
-/* read_pc, write_pc, read_sp, write_sp, read_fp, write_fp, etc.
- Special handling for registers PC, SP, and FP. */
+/* read_pc, write_pc, read_sp, write_sp, read_fp, etc. Special
+ handling for registers PC, SP, and FP. */
/* NOTE: cagney/2001-02-18: The functions generic_target_read_pc(),
read_pc_pid(), read_pc(), generic_target_write_pc(),
write_pc_pid(), write_pc(), generic_target_read_sp(), read_sp(),
- generic_target_write_sp(), write_sp(), generic_target_read_fp(),
- read_fp(), generic_target_write_fp(), write_fp will eventually be
- moved out of the reg-cache into either frame.[hc] or to the
- multi-arch framework. The are not part of the raw register cache. */
+ generic_target_write_sp(), write_sp(), generic_target_read_fp() and
+ read_fp(), will eventually be moved out of the reg-cache into
+ either frame.[hc] or to the multi-arch framework. The are not part
+ of the raw register cache. */
/* This routine is getting awfully cluttered with #if's. It's probably
time to turn this into READ_PC and define it in the tm.h file.
write_register_pid (PC_REGNUM, pc, ptid);
if (NPC_REGNUM >= 0)
write_register_pid (NPC_REGNUM, pc + 4, ptid);
- if (NNPC_REGNUM >= 0)
- write_register_pid (NNPC_REGNUM, pc + 8, ptid);
#else
internal_error (__FILE__, __LINE__,
"generic_target_write_pc");
return TARGET_READ_FP ();
}
-void
-generic_target_write_fp (CORE_ADDR val)
-{
-#ifdef FP_REGNUM
- if (FP_REGNUM >= 0)
- {
- write_register (FP_REGNUM, val);
- return;
- }
-#endif
- internal_error (__FILE__, __LINE__,
- "generic_target_write_fp");
-}
-
-void
-write_fp (CORE_ADDR val)
-{
- TARGET_WRITE_FP (val);
-}
-
/* ARGSUSED */
static void
reg_flush_command (char *command, int from_tty)