* config/mips/tm-irix3.h: Clean up, use tm-bigmips.h and redefine

	the necessary bits.
	* findvar.c (value_from_register): Fix uninitialized first_addr
	which caused problems with assignment of doubles to register variables
	on some targets.
	* mipsread.c: Remove TM_FILE_OVERRIDE, include tm.h and provide the
	missing mips definitions if necessary.

	Fix handling of double register variables for mips targets and big
	endian hosts. These patches are from Paul Flinders <ptf@delcam.co.uk>.
	* config/mips/tm-mips.h: Increase MAX_REGISTER_{RAW,VIRTUAL}_SIZE to
	  8 bytes for doubles.
	* config/mips/tm-mips.h (REGISTER_CONVERT_TO_TYPE): New macro for
	  conversion of type held in multiple registers to host format.
	* config/mips/tm-mips.h (REGISTER_CONVERT_FROM_TYPE): New macro,
	  companion to REGISTER_CONVERT_TO_TYPE.
	* config/mips/tm-mips.h (EXTRACT_RETURN_VALUE, STORE_RETURN_VALUE):
	  Convert to function calls.
	* config/mips/tm-mips.h (FIX_CALL_DUMMY): New code for big endian
	  mips targets.
	* mips-tdep.c (mips_print_register): Raw buffer now needs just
	  MAX_REGISTER_RAW_SIZE bytes.
	* mips-tdep.c (mips_print_register): Use REGISTER_CONVERT_TO_TYPE
	  (if defined) for doubles.
	* mips-tdep.c: (mips_extract_return_value, mips_store_return_value):
	  New functions, take care of REGISTER_CONVERT_TO/FROM_TYPE.
	* valops.c (value_assign): Use REGISTER_CONVERT_TO_TYPE if
	  defined.
	* findvar.c (value_from_register): Use REGISTER_CONVERT_TO_TYPE if
	  defined.

1 files changed, 26 insertions, 4 deletions

diff --git a/gdb/mipsread.c b/gdb/mipsread.c
index 4f0558b..039f3a4 100644
--- a/gdb/mipsread.c
+++ b/gdb/mipsread.c
@@ -45,9 +45,7 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
    This module can read all four of the known byte-order combinations,
    on any type of host.  */
 
-#define	TM_FILE_OVERRIDE
 #include "defs.h"
-#include "mips/tm-mips.h"
 #include "symtab.h"
 #include "gdbtypes.h"
 #include "gdbcore.h"
@@ -58,6 +56,25 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
 #include "stabsread.h"
 #include "complaints.h"
 
+/* These are needed if the tm.h file does not contain the necessary
+   mips specific definitions.  */
+
+#ifndef MIPS_EFI_SYMBOL_NAME
+#define MIPS_EFI_SYMBOL_NAME "__GDB_EFI_INFO__"
+#include "coff/sym.h"
+#include "coff/symconst.h"
+typedef struct mips_extra_func_info {
+        long    numargs;
+        PDR     pdr;
+} *mips_extra_func_info_t;
+#ifndef RA_REGNUM
+#define RA_REGNUM 0
+#endif
+#ifndef FP0_REGNUM
+#define FP0_REGNUM 0
+#endif
+#endif
+
 #ifdef USG
 #include <sys/types.h>
 #define L_SET 0
@@ -415,8 +432,6 @@ mipscoff_psymtab_to_symtab (pst)
       printf_filtered ("Reading in symbols for %s...", pst->filename);
       fflush (stdout);
     }
-  /* Get the BFD and list of pending typedefs */
-  cur_bfd = CUR_BFD (pst);
 
   next_symbol_text_func = mips_next_symbol_text;
 
@@ -2392,8 +2407,15 @@ psymtab_to_symtab_1 (pst, filename)
 			     pst->dependencies[i]->filename);
       }
 
+  /* Do nothing if this is a dummy psymtab.  */
+
+  if (pst->n_global_syms == 0 && pst->n_static_syms == 0
+      && pst->textlow == 0 && pst->texthigh == 0)
+    return;
+
   /* Now read the symbols for this symtab */
 
+  cur_bfd = CUR_BFD (pst);
   current_objfile = pst->objfile;
   cur_fd = FDR_IDX (pst);
   fh = (cur_fd == -1) ? (FDR *) NULL : ecoff_data (cur_bfd)->fdr + cur_fd;