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/* main.c -- top level of ARMulator: ARM6 Instruction Emulator.
Copyright (C) 1994 Advanced RISC Machines Ltd.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
/**********************************************************************/
/* Forks the ARMulator and hangs on a socket passing on RDP messages */
/* down a pipe to the ARMulator which translates them into RDI calls. */
/**********************************************************************/
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <signal.h>
#include <netdb.h>
#include <unistd.h>
#include "armdefs.h"
#include "dbg_rdi.h"
#include "dbg_conf.h"
#define MAXHOSTNAMELENGTH 64
/* Read and write routines down sockets and pipes */
void MYread_chars(int sock, void *p, int n);
unsigned char MYread_char(int sock);
ARMword MYread_word(int sock);
void MYread_FPword(int sock, char *putinhere);
void MYwrite_word(int sock, ARMword i);
void MYwrite_string(int sock, char *s);
void MYwrite_FPword(int sock, char *fromhere);
void MYwrite_char(int sock, unsigned char c);
void passon(int source, int dest, int n);
/* Mother and child processes */
void parent (void);
void kid(void);
/* The child process id. */
pid_t child;
/* The socket to the debugger */
int debugsock;
/* The pipes between the two processes */
int mumkid[2];
int kidmum[2];
/* A pipe for handling SWI return values that goes straight from the */
/* parent to the ARMulator host interface, bypassing the childs RDP */
/* to RDI interpreter */
int DebuggerARMul[2];
/* The maximum number of file descriptors */
int nfds;
/* The socket handle */
int sockethandle;
/* The machine name */
char localhost[MAXHOSTNAMELENGTH + 1];
/* The socket number */
unsigned int socketnumber;
/**************************************************************/
/* Takes one argument: the socket number. */
/* Opens a socket to the debugger, and once opened spawns the */
/* ARMulator and sets up a couple of pipes. */
/**************************************************************/
int main(int argc, char *argv[]) {
int i;
struct sockaddr_in devil, isa;
struct hostent *hp;
if (argc == 1) {
fprintf(stderr, "No socket number\n");
return 1;
}
sscanf(argv[1], "%d", &socketnumber);
if (!socketnumber || socketnumber > 0xffff) {
fprintf(stderr, "Invalid socket number: %d\n", socketnumber);
return 1;
}
gethostname(localhost, MAXHOSTNAMELENGTH);
hp = gethostbyname(localhost);
if (!hp) {
fprintf(stderr, "Cannot get local host info\n");
return 1;
}
/* Open a socket */
sockethandle = socket(hp->h_addrtype, SOCK_STREAM, 0);
if (sockethandle < 0) {
perror("socket");
return 1;
}
devil.sin_family = hp->h_addrtype;
devil.sin_port = htons(socketnumber);
devil.sin_addr.s_addr = 0;
for(i = 0; i < sizeof(devil.sin_zero); i++) devil.sin_zero[i] = '\000';
memcpy(&devil.sin_addr, hp->h_addr_list[0], hp->h_length);
if (bind(sockethandle, &devil, sizeof(devil)) < 0) {
perror("bind");
return 1;
}
/* May only accept one debugger at once */
if (listen(sockethandle, 0)) {
perror("listen");
return 1;
}
fprintf(stderr, "Waiting for connection from debugger...");
debugsock = accept(sockethandle, &isa, &i);
if (debugsock < 0) {
perror("accept");
return 1;
}
fprintf(stderr, " done.\nConnection Established.\n");
nfds = getdtablesize();
if (pipe(mumkid)) {
perror("pipe");
return 1;
}
if (pipe(kidmum)) {
perror("pipe");
return 1;
}
if (pipe(DebuggerARMul)) {
perror("pipe");
return 1;
}
#ifdef DEBUG
fprintf(stderr, "Created pipes ok\n");
#endif
child = fork();
#ifdef DEBUG
fprintf(stderr, "fork() ok\n");
#endif
if (child == 0) kid ();
if (child != -1) parent ();
perror("fork");
return 1;
}
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