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Diffstat (limited to 'sim/arm/main.c')
-rw-r--r-- | sim/arm/main.c | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/sim/arm/main.c b/sim/arm/main.c new file mode 100644 index 0000000..f012b28 --- /dev/null +++ b/sim/arm/main.c @@ -0,0 +1,183 @@ +/* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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; +} + + + + |