sim/arm/gdbhost.c

   1 /*  gdbhost.c -- ARMulator RDP to gdb comms code:  ARM6 Instruction Emulator.
   2     Copyright (C) 1994 Advanced RISC Machines Ltd.
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
  17
  18 /***********************************************************/
  19 /* Functions that communicate info back to the debugger... */
  20 /***********************************************************/
  21
  22 #include <stdio.h>
  23 #include <stdarg.h>
  24 #include "armdefs.h"
  25 #include "communicate.h"
  26 #include "dbg_rdi.h"
  27 #include "armos.h"
  28
  29 #define OS_SendNothing 0x0
  30 #define OS_SendChar 0x1
  31 #define OS_SendWord 0x2
  32 #define OS_SendString 0x3
  33
  34 /* Defined in kid.c */
  35 extern int wait_for_osreply (ARMword * reply);
  36
  37 /* A pipe for handling SWI return values that goes straight from the */
  38 /* parent to the ARMulator host interface, bypassing the childs RDP */
  39 /* to RDI interpreter */
  40 int DebuggerARMul[2];
  41
  42 /* The pipes between the two processes */
  43 int mumkid[2];
  44 int kidmum[2];
  45
  46 void
  47 myprint (void *arg, const char *format, va_list ap)
  48 {
  49 #ifdef DEBUG
  50   fprintf (stderr, "Host: myprint\n");
  51 #endif
  52   vfprintf (stderr, format, ap);
  53 }
  54
  55
  56 /* Waits for a keypress on the debuggers' keyboard */
  57 void
  58 mypause (void *arg)
  59 {
  60 #ifdef DEBUG
  61   fprintf (stderr, "Host: mypause\n");
  62 #endif
  63 }                               /* I do love exciting functions */
  64
  65 void
  66 mywritec (void *arg, int c)
  67 {
  68 #ifdef DEBUG
  69   fprintf (stderr, "Mywrite : %c\n", c);
  70 #endif
  71   MYwrite_char (kidmum[1], RDP_OSOp);   /* OS Operation Request Message */
  72   MYwrite_word (kidmum[1], SWI_WriteC); /* Print... */
  73   MYwrite_char (kidmum[1], OS_SendChar);        /*  ...a single character */
  74   MYwrite_char (kidmum[1], (unsigned char) c);
  75
  76   wait_for_osreply ((ARMword *) 0);
  77 }
  78
  79 int
  80 myreadc (void *arg)
  81 {
  82   char c;
  83   ARMword x;
  84
  85 #ifdef DEBUG
  86   fprintf (stderr, "Host: myreadc\n");
  87 #endif
  88   MYwrite_char (kidmum[1], RDP_OSOp);   /* OS Operation Request Message */
  89   MYwrite_word (kidmum[1], SWI_ReadC);  /* Read... */
  90   MYwrite_char (kidmum[1], OS_SendNothing);
  91
  92   c = wait_for_osreply (&x);
  93   return (x);
  94 }
  95
  96
  97 int
  98 mywrite (void *arg, char const *buffer, int len)
  99 {
 100 #ifdef DEBUG
 101   fprintf (stderr, "Host: mywrite\n");
 102 #endif
 103   return 0;
 104 }
 105
 106 char *
 107 mygets (void *arg, char *buffer, int len)
 108 {
 109 #ifdef DEBUG
 110   fprintf (stderr, "Host: mygets\n");
 111 #endif
 112   return buffer;
 113 }