1 /* main.c -- top level of ARMulator: ARM6 Instruction Emulator.
2 Copyright (C) 1994 Advanced RISC Machines Ltd.
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.
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.
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/>. */
17 /**********************************************************************/
18 /* Forks the ARMulator and hangs on a socket passing on RDP messages */
19 /* down a pipe to the ARMulator which translates them into RDI calls. */
20 /**********************************************************************/
24 #include <sys/types.h>
25 #include <sys/socket.h>
26 #include <netinet/in.h>
35 #define MAXHOSTNAMELENGTH 64
37 /* Read and write routines down sockets and pipes */
39 void MYread_chars (int sock, void *p, int n);
40 unsigned char MYread_char (int sock);
41 ARMword MYread_word (int sock);
42 void MYread_FPword (int sock, char *putinhere);
44 void MYwrite_word (int sock, ARMword i);
45 void MYwrite_string (int sock, char *s);
46 void MYwrite_FPword (int sock, char *fromhere);
47 void MYwrite_char (int sock, unsigned char c);
49 void passon (int source, int dest, int n);
52 /* Mother and child processes */
56 /* The child process id. */
59 /* The socket to the debugger */
62 /* The pipes between the two processes */
66 /* A pipe for handling SWI return values that goes straight from the */
67 /* parent to the ARMulator host interface, bypassing the childs RDP */
68 /* to RDI interpreter */
71 /* The maximum number of file descriptors */
74 /* The socket handle */
77 /* The machine name */
78 char localhost[MAXHOSTNAMELENGTH + 1];
80 /* The socket number */
81 unsigned int socketnumber;
83 /**************************************************************/
84 /* Takes one argument: the socket number. */
85 /* Opens a socket to the debugger, and once opened spawns the */
86 /* ARMulator and sets up a couple of pipes. */
87 /**************************************************************/
89 main (int argc, char *argv[])
92 struct sockaddr_in devil, isa;
98 fprintf (stderr, "No socket number\n");
102 sscanf (argv[1], "%d", &socketnumber);
103 if (!socketnumber || socketnumber > 0xffff)
105 fprintf (stderr, "Invalid socket number: %d\n", socketnumber);
109 gethostname (localhost, MAXHOSTNAMELENGTH);
110 hp = gethostbyname (localhost);
113 fprintf (stderr, "Cannot get local host info\n");
118 sockethandle = socket (hp->h_addrtype, SOCK_STREAM, 0);
119 if (sockethandle == -1)
125 devil.sin_family = hp->h_addrtype;
126 devil.sin_port = htons (socketnumber);
127 devil.sin_addr.s_addr = 0;
128 for (i = 0; i < sizeof (devil.sin_zero); i++)
129 devil.sin_zero[i] = '\000';
130 memcpy (&devil.sin_addr, hp->h_addr_list[0], hp->h_length);
132 if (bind (sockethandle, &devil, sizeof (devil)) < 0)
138 /* May only accept one debugger at once */
140 if (listen (sockethandle, 0))
146 fprintf (stderr, "Waiting for connection from debugger...");
148 debugsock = accept (sockethandle, &isa, &i);
155 fprintf (stderr, " done.\nConnection Established.\n");
157 nfds = getdtablesize ();
170 if (pipe (DebuggerARMul))
177 fprintf (stderr, "Created pipes ok\n");
183 fprintf (stderr, "fork() ok\n");