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