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
myprint(void * arg,const char * format,va_list ap)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
mypause(void * arg)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
mywritec(void * arg,int c)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
myreadc(void * arg)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
mywrite(void * arg,char const * buffer,int len)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 *
mygets(void * arg,char * buffer,int len)106 mygets (void *arg, char *buffer, int len)
107 {
108 #ifdef DEBUG
109 fprintf (stderr, "Host: mygets\n");
110 #endif
111 return buffer;
112 }
113