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., 675 Mass Ave, Cambridge, MA 02139, 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 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 mypause (void *arg)
  57 {
  58 #ifdef DEBUG
  59   fprintf (stderr, "Host: mypause\n");
  60 #endif
  61 }  /* I do love exciting functions */
  62
  63 void mywritec(void *arg, int c)
  64 {
  65 #ifdef DEBUG
  66   fprintf(stderr, "Mywrite : %c\n", c);
  67 #endif
  68   MYwrite_char(kidmum[1], RDP_OSOp);     /* OS Operation Request Message */
  69   MYwrite_word(kidmum[1], SWI_WriteC);   /* Print... */
  70   MYwrite_char(kidmum[1], OS_SendChar);  /*  ...a single character */
  71   MYwrite_char(kidmum[1], (unsigned char) c);
  72
  73   wait_for_osreply((ARMword *) 0);
  74 }
  75
  76 int myreadc(void *arg)
  77 {
  78   char c;
  79   ARMword x;
  80
  81 #ifdef DEBUG
  82   fprintf(stderr, "Host: myreadc\n");
  83 #endif
  84   MYwrite_char(kidmum[1], RDP_OSOp);  /* OS Operation Request Message */
  85   MYwrite_word(kidmum[1], SWI_ReadC); /* Read... */
  86   MYwrite_char(kidmum[1], OS_SendNothing);
  87
  88   c = wait_for_osreply(&x);
  89   return (x);
  90 }
  91
  92
  93 int mywrite(void *arg, char const *buffer, int len)
  94 {
  95 #ifdef DEBUG
  96   fprintf(stderr, "Host: mywrite\n");
  97 #endif
  98   return 0;
  99 }
 100
 101 char *mygets(void *arg, char *buffer, int len)
 102 {
 103 #ifdef DEBUG
 104   fprintf(stderr, "Host: mygets\n");
 105 #endif
 106   return buffer;
 107 }