* mipsread.c (read_alphacoff_dynamic_symtab): Replace alloca calls

[deliverable/binutils-gdb.git] / gdb / remote-vx29k.c

diff --git a/gdb/remote-vx29k.c b/gdb/remote-vx29k.c
index 519d9300eb3934b6753e55ebfe478862f0841b34..1d5230c689b07eb98bc9dd63342e572a9f9e2a0a 100644 (file)
--- a/gdb/remote-vx29k.c
+++ b/gdb/remote-vx29k.c
@@ -1,46 +1,44 @@
 /* Am29k-dependent portions of the RPC protocol
-   used with a VxWorks target 
 
-Contributed by Wind River Systems.
+   Contributed by Wind River Systems.
 
-This file is part of GDB.
+   This file is part of GDB.
 
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
 
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
 
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
 
 #include <stdio.h>
 #include "defs.h"
 
-#include "vx-share/regPacket.h"  
+#include "vx-share/regPacket.h"
 #include "frame.h"
 #include "inferior.h"
-#include "wait.h"
 #include "target.h"
 #include "gdbcore.h"
 #include "command.h"
 #include "symtab.h"
 #include "symfile.h"           /* for struct complaint */
 
-#include <string.h>
+#include "gdb_string.h"
 #include <errno.h>
-#include <signal.h>
 #include <fcntl.h>
 #include <sys/types.h>
 #include <sys/time.h>
 #include <sys/socket.h>
 
-#ifdef _AIX                     /* IBM claims "void *malloc()" not char * */
+#ifdef _AIX                    /* IBM claims "void *malloc()" not char * */
 #define malloc bogon_malloc
 #endif
 
@@ -71,8 +69,7 @@ extern void net_write_registers ();
    it is ignored.  FIXME look at regno to improve efficiency.  */
 
 void
-vx_read_register (regno)
-     int regno;
+vx_read_register (int regno)
 {
   char am29k_greg_packet[AM29K_GREG_PLEN];
   char am29k_fpreg_packet[AM29K_FPREG_PLEN];
@@ -97,7 +94,7 @@ vx_read_register (regno)
 
   /* PAD For now, don't care about exop register */
 
-  bzero (&registers[REGISTER_BYTE (EXO_REGNUM)], 1 * AM29K_GREG_SIZE);
+  memset (&registers[REGISTER_BYTE (EXO_REGNUM)], '\0', AM29K_GREG_SIZE);
 
   /* If the target has floating point registers, fetch them.
      Otherwise, zero the floating point register values in
@@ -107,22 +104,22 @@ vx_read_register (regno)
   if (target_has_fp)
     {
       net_read_registers (am29k_fpreg_packet, AM29K_FPREG_PLEN,
-                          PTRACE_GETFPREGS);
+                         PTRACE_GETFPREGS);
       registers[REGISTER_BYTE (FPE_REGNUM)] = am29k_fpreg_packet[AM29K_R_FPE];
       registers[REGISTER_BYTE (FPS_REGNUM)] = am29k_fpreg_packet[AM29K_R_FPS];
 
       /* PAD For now, don't care about registers (?) AI0 to q */
 
-      bzero (&registers[REGISTER_BYTE (161)], 21 * AM29K_FPREG_SIZE);
+      memset (&registers[REGISTER_BYTE (161)], '\0', 21 * AM29K_FPREG_SIZE);
     }
   else
-    { 
-      bzero (&registers[REGISTER_BYTE (FPE_REGNUM)], 1 * AM29K_FPREG_SIZE);
-      bzero (&registers[REGISTER_BYTE (FPS_REGNUM)], 1 * AM29K_FPREG_SIZE);
+    {
+      memset (&registers[REGISTER_BYTE (FPE_REGNUM)], '\0', AM29K_FPREG_SIZE);
+      memset (&registers[REGISTER_BYTE (FPS_REGNUM)], '\0', AM29K_FPREG_SIZE);
 
       /* PAD For now, don't care about registers (?) AI0 to q */
 
-      bzero (&registers[REGISTER_BYTE (161)], 21 * AM29K_FPREG_SIZE);
+      memset (&registers[REGISTER_BYTE (161)], '\0', 21 * AM29K_FPREG_SIZE);
     }
 
   /* Mark the register cache valid.  */
@@ -135,8 +132,7 @@ vx_read_register (regno)
    it is ignored.  FIXME look at regno to improve efficiency.  */
 
 void
-vx_write_register (regno)
-     int regno;
+vx_write_register (int regno)
 {
   char am29k_greg_packet[AM29K_GREG_PLEN];
   char am29k_fpreg_packet[AM29K_FPREG_PLEN];
@@ -163,7 +159,23 @@ vx_write_register (regno)
       am29k_fpreg_packet[AM29K_R_FPS] = registers[REGISTER_BYTE (FPS_REGNUM)];
 
       net_write_registers (am29k_fpreg_packet, AM29K_FPREG_PLEN,
-                           PTRACE_SETFPREGS);
+                          PTRACE_SETFPREGS);
     }
 }
 
+/* VxWorks zeroes fp when the task is initialized; we use this
+   to terminate the frame chain. Chain means here the nominal address of
+   a frame, that is, the return address (lr0) address in the stack. To
+   obtain the frame pointer (lr1) contents, we must add 4 bytes.
+   Note : may be we should modify init_frame_info() to get the frame pointer
+   and store it into the frame_info struct rather than reading its
+   contents when FRAME_CHAIN_VALID is invoked.  THISFRAME is unused.  */
+
+int
+vx29k_frame_chain_valid (CORE_ADDR chain, struct frame_info *thisframe)
+{
+  int fp_contents;
+
+  read_memory ((CORE_ADDR) (chain + 4), (char *) &fp_contents, 4);
+  return (fp_contents != 0);
+}