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
myprint(void * arg,const char * format,va_list ap)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
mypause(void * arg)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
mywritec(void * arg,int c)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
myreadc(void * arg)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
mywrite(void * arg,char const * buffer,int len)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 *
mygets(void * arg,char * buffer,int len)107 mygets (void *arg, char *buffer, int len)
108 {
109 #ifdef DEBUG
110 fprintf (stderr, "Host: mygets\n");
111 #endif
112 return buffer;
113 }
114