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 3 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, see <http://www.gnu.org/licenses/>. */
  16
  17 /***********************************************************/
  18 /* Functions that communicate info back to the debugger... */
  19 /***********************************************************/
  20
  21 #include <stdio.h>
  22 #include <stdarg.h>
  23 #include "armdefs.h"
  24 #include "communicate.h"
  25 #include "dbg_rdi.h"
  26 #include "armos.h"
  27
  28 #define OS_SendNothing 0x0
  29 #define OS_SendChar 0x1
  30 #define OS_SendWord 0x2
  31 #define OS_SendString 0x3
  32
  33 /* Defined in kid.c */
  34 extern int wait_for_osreply (ARMword * reply);
  35
  36 /* A pipe for handling SWI return values that goes straight from the */
  37 /* parent to the ARMulator host interface, bypassing the childs RDP */
  38 /* to RDI interpreter */
  39 int DebuggerARMul[2];
  40
  41 /* The pipes between the two processes */
  42 int mumkid[2];
  43 int kidmum[2];
  44
  45 void
  46 myprint (void *arg, const char *format, va_list ap)
  47 {
  48 #ifdef DEBUG
  49   fprintf (stderr, "Host: myprint\n");
  50 #endif
  51   vfprintf (stderr, format, ap);
  52 }
  53
  54
  55 /* Waits for a keypress on the debuggers' keyboard */
  56 void
  57 mypause (void *arg)
  58 {
  59 #ifdef DEBUG
  60   fprintf (stderr, "Host: mypause\n");
  61 #endif
  62 }                               /* I do love exciting functions */
  63
  64 void
  65 mywritec (void *arg, int c)
  66 {
  67 #ifdef DEBUG
  68   fprintf (stderr, "Mywrite : %c\n", c);
  69 #endif
  70   MYwrite_char (kidmum[1], RDP_OSOp);   /* OS Operation Request Message */
  71   MYwrite_word (kidmum[1], SWI_WriteC); /* Print... */
  72   MYwrite_char (kidmum[1], OS_SendChar);        /*  ...a single character */
  73   MYwrite_char (kidmum[1], (unsigned char) c);
  74
  75   wait_for_osreply ((ARMword *) 0);
  76 }
  77
  78 int
  79 myreadc (void *arg)
  80 {
  81   char c;
  82   ARMword x;
  83
  84 #ifdef DEBUG
  85   fprintf (stderr, "Host: myreadc\n");
  86 #endif
  87   MYwrite_char (kidmum[1], RDP_OSOp);   /* OS Operation Request Message */
  88   MYwrite_word (kidmum[1], SWI_ReadC);  /* Read... */
  89   MYwrite_char (kidmum[1], OS_SendNothing);
  90
  91   c = wait_for_osreply (&x);
  92   return (x);
  93 }
  94
  95
  96 int
  97 mywrite (void *arg, char const *buffer, int len)
  98 {
  99 #ifdef DEBUG
 100   fprintf (stderr, "Host: mywrite\n");
 101 #endif
 102   return 0;
 103 }
 104
 105 char *
 106 mygets (void *arg, char *buffer, int len)
 107 {
 108 #ifdef DEBUG
 109   fprintf (stderr, "Host: mygets\n");
 110 #endif
 111   return buffer;
 112 }