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arm_simulator.c
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arm_simulator.c
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/*
Armator - simulateur de jeu d'instruction ARMv5T à but pédagogique
Copyright (C) 2011 Guillaume Huard
Ce programme est libre, vous pouvez le redistribuer et/ou le modifier selon les
termes de la Licence Publique Générale GNU publiée par la Free Software
Foundation (version 2 ou bien toute autre version ultérieure choisie par vous).
Ce programme est distribué car potentiellement utile, mais SANS AUCUNE
GARANTIE, ni explicite ni implicite, y compris les garanties de
commercialisation ou d'adaptation dans un but spécifique. Reportez-vous à la
Licence Publique Générale GNU pour plus de détails.
Vous devez avoir reçu une copie de la Licence Publique Générale GNU en même
temps que ce programme ; si ce n'est pas le cas, écrivez à la Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307,
États-Unis.
Contact: Guillaume.Huard@imag.fr
Bâtiment IMAG
700 avenue centrale, domaine universitaire
38401 Saint Martin d'Hères
*/
#include <sys/socket.h>
#include <pthread.h>
#include <getopt.h>
#include "csapp.h"
#include "scanner.h"
#include "arm.h"
#include "memory.h"
#include "gdb_protocol.h"
#include "trace.h"
#include "debug.h"
struct shared_data {
memory mem;
arm_core arm;
pthread_mutex_t lock;
in_port_t gdb_port, irq_port;
};
struct server_data {
int socket;
unsigned short port;
};
static struct server_data create_server(in_port_t port) {
struct sockaddr_in addr;
socklen_t addr_length;
struct server_data result;
int option_value=1;
result.socket = Socket(PF_INET, SOCK_STREAM, 0);
Setsockopt(result.socket, SOL_SOCKET, SO_REUSEADDR, &option_value,
sizeof(option_value));
bzero(&addr, sizeof(addr));
addr.sin_port = htons(port);
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = htonl(INADDR_ANY);
Bind(result.socket, (struct sockaddr *) &addr, sizeof(addr));
addr_length = sizeof(addr);
getsockname(result.socket, (struct sockaddr *) &addr, &addr_length);
result.port = ntohs(addr.sin_port);
Listen(result.socket, 1);
return result;
}
static void *gdb_listener(void *arg) {
struct shared_data *shared = (struct shared_data *) arg;
struct sockaddr_in peer;
int connection;
socklen_t peer_length;
struct server_data server;
server = create_server(shared->gdb_port);
fprintf(stderr, "Listening to gdb connection on port %d\n", server.port);
peer_length = sizeof(peer);
connection = Accept(server.socket, (struct sockaddr *) &peer, &peer_length);
gdb_scanner(shared->arm, shared->mem, connection, connection,
&shared->lock);
shutdown(connection, SHUT_RDWR);
close(server.socket);
pthread_exit(NULL);
}
static void *irq_listener(void *arg) {
struct shared_data *shared = (struct shared_data *) arg;
struct sockaddr_in peer;
int connection;
socklen_t peer_length;
struct server_data server;
unsigned char irq;
server = create_server(shared->irq_port);
fprintf(stderr, "Listening to irq connections on port %d\n", server.port);
while (1) {
peer_length = sizeof(peer);
connection = Accept(server.socket, (struct sockaddr *) &peer,
&peer_length);
while (Read(connection, &irq, 1) > 0) {
pthread_mutex_lock(&shared->lock);
arm_exception(shared->arm, irq);
pthread_mutex_unlock(&shared->lock);
}
shutdown(connection, SHUT_RDWR);
}
close(server.socket);
pthread_exit(NULL);
}
void usage(char *name) {
fprintf(stderr, "Usage:\n"
"%s [ --help ] [ --gdb-port port ] [ --irq-port port ] "
"[ --trace-file file ] [ --trace-registers ] [ --trace-memory ] "
"[ --trace-state ] [ --trace-position ] [ --debug filename ]\n\n"
"Start an ARMv5 instruction set simulator that acts as a gdb server "
"and can receive interrupts. It is possible to specify on which ports "
"the simulator listen to gdb client or irq sending program "
"connections. Trace options have the following behavior:\n"
"- trace file: file into which trace information is stored (default is"
" stdout)\n"
"- trace registers: outputs informations about each access to"
" registers\n"
"- trace memory: outputs informations about each access to memory\n"
"- trace state: outputs the processor state after each instruction\n"
"- trace position: for each traced access, outputs the file and line"
" at which the access has been performed\n"
"The debug switch enable selective reporting of debug messages on a "
"per source file basis\n"
, name);
}
int main(int argc, char *argv[]) {
struct shared_data shared;
pthread_t gdb_thread;
pthread_t irq_thread;
void *result;
int opt;
FILE *trace_file;
struct option longopts[] = {
{ "gdb-port", required_argument, NULL, 'g' },
{ "irq-port", required_argument, NULL, 'i' },
{ "trace-file", required_argument, NULL, 't' },
{ "trace-registers", no_argument, NULL, 'r' },
{ "trace-memory", no_argument, NULL, 'm' },
{ "trace-state", no_argument, NULL, 's' },
{ "trace-position", no_argument, NULL, 'p' },
{ "help", no_argument, NULL, 'h' },
{ "debug", required_argument, NULL, 'd' },
{ NULL, 0, NULL, 0 }
};
shared.gdb_port = 0;
shared.irq_port = 0;
trace_file = stdout;
while ((opt = getopt_long(argc, argv, "g:i:ht:rmspd:", longopts, NULL))
!= -1) {
switch(opt) {
case 'g':
shared.gdb_port = atoi(optarg);
break;
case 'i':
shared.irq_port = atoi(optarg);
break;
case 'h':
usage(argv[0]);
exit(0);
case 't':
trace_file = fopen(optarg, "w");
if (trace_file == NULL) {
perror("Trace file");
exit(1);
}
break;
case 'r':
trace_add(REGISTERS);
break;
case 'm':
trace_add(MEMORY);
break;
case 's':
trace_add(STATE);
break;
case 'p':
trace_add(POSITION);
break;
case 'd':
add_debug_to(optarg);
break;
default:
fprintf(stderr, "Unrecognized option %c\n", opt);
usage(argv[0]);
exit(1);
}
}
gdb_init();
arm_init();
set_trace_file(trace_file);
#ifdef BIG_ENDIAN_SIMULATOR
shared.mem = memory_create(0x20000, 1);
#else
shared.mem = memory_create(0x20000, 0);
#endif
shared.arm = arm_create(shared.mem);
pthread_mutex_init(&shared.lock, NULL);
pthread_create(&gdb_thread, NULL, gdb_listener, &shared);
pthread_create(&irq_thread, NULL, irq_listener, &shared);
pthread_join(gdb_thread, &result);
arm_destroy(shared.arm);
memory_destroy(shared.mem);
return 0;
}