4 * Copyright (c) 2003-2008 Fabrice Bellard
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
27 #include <machine/trap.h>
30 #include "qemu-common.h"
34 #define DEBUG_LOGFILE "/tmp/qemu.log"
38 static const char *interp_prefix = CONFIG_QEMU_PREFIX;
39 const char *qemu_uname_release = CONFIG_UNAME_RELEASE;
40 extern char **environ;
42 /* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so
43 we allocate a bigger stack. Need a better solution, for example
44 by remapping the process stack directly at the right place */
45 unsigned long x86_stack_size = 512 * 1024;
47 void gemu_log(const char *fmt, ...)
52 vfprintf(stderr, fmt, ap);
56 /* These are no-ops because we are not threadsafe. */
57 static inline void cpu_exec_start(CPUState *env)
61 static inline void cpu_exec_end(CPUState *env)
65 static inline void start_exclusive(void)
69 static inline void end_exclusive(void)
77 void fork_end(int child)
80 gdbserver_fork(thread_env);
84 void cpu_list_lock(void)
88 void cpu_list_unlock(void)
93 #define SPARC64_STACK_BIAS 2047
96 /* WARNING: dealing with register windows _is_ complicated. More info
97 can be found at http://www.sics.se/~psm/sparcstack.html */
98 static inline int get_reg_index(CPUSPARCState *env, int cwp, int index)
100 index = (index + cwp * 16) % (16 * env->nwindows);
101 /* wrap handling : if cwp is on the last window, then we use the
102 registers 'after' the end */
103 if (index < 8 && env->cwp == env->nwindows - 1)
104 index += 16 * env->nwindows;
108 /* save the register window 'cwp1' */
109 static inline void save_window_offset(CPUSPARCState *env, int cwp1)
114 sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)];
115 #ifdef TARGET_SPARC64
117 sp_ptr += SPARC64_STACK_BIAS;
119 #if defined(DEBUG_WIN)
120 printf("win_overflow: sp_ptr=0x" TARGET_ABI_FMT_lx " save_cwp=%d\n",
123 for(i = 0; i < 16; i++) {
124 /* FIXME - what to do if put_user() fails? */
125 put_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr);
126 sp_ptr += sizeof(abi_ulong);
130 static void save_window(CPUSPARCState *env)
132 #ifndef TARGET_SPARC64
133 unsigned int new_wim;
134 new_wim = ((env->wim >> 1) | (env->wim << (env->nwindows - 1))) &
135 ((1LL << env->nwindows) - 1);
136 save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2));
139 save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2));
145 static void restore_window(CPUSPARCState *env)
147 #ifndef TARGET_SPARC64
148 unsigned int new_wim;
150 unsigned int i, cwp1;
153 #ifndef TARGET_SPARC64
154 new_wim = ((env->wim << 1) | (env->wim >> (env->nwindows - 1))) &
155 ((1LL << env->nwindows) - 1);
158 /* restore the invalid window */
159 cwp1 = cpu_cwp_inc(env, env->cwp + 1);
160 sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)];
161 #ifdef TARGET_SPARC64
163 sp_ptr += SPARC64_STACK_BIAS;
165 #if defined(DEBUG_WIN)
166 printf("win_underflow: sp_ptr=0x" TARGET_ABI_FMT_lx " load_cwp=%d\n",
169 for(i = 0; i < 16; i++) {
170 /* FIXME - what to do if get_user() fails? */
171 get_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr);
172 sp_ptr += sizeof(abi_ulong);
174 #ifdef TARGET_SPARC64
176 if (env->cleanwin < env->nwindows - 1)
184 static void flush_windows(CPUSPARCState *env)
190 /* if restore would invoke restore_window(), then we can stop */
191 cwp1 = cpu_cwp_inc(env, env->cwp + offset);
192 #ifndef TARGET_SPARC64
193 if (env->wim & (1 << cwp1))
196 if (env->canrestore == 0)
201 save_window_offset(env, cwp1);
204 cwp1 = cpu_cwp_inc(env, env->cwp + 1);
205 #ifndef TARGET_SPARC64
206 /* set wim so that restore will reload the registers */
207 env->wim = 1 << cwp1;
209 #if defined(DEBUG_WIN)
210 printf("flush_windows: nb=%d\n", offset - 1);
214 void cpu_loop(CPUSPARCState *env, enum BSDType bsd_type)
216 int trapnr, ret, syscall_nr;
217 //target_siginfo_t info;
220 trapnr = cpu_sparc_exec (env);
223 #ifndef TARGET_SPARC64
228 syscall_nr = env->gregs[1];
229 if (bsd_type == target_freebsd)
230 ret = do_freebsd_syscall(env, syscall_nr,
231 env->regwptr[0], env->regwptr[1],
232 env->regwptr[2], env->regwptr[3],
233 env->regwptr[4], env->regwptr[5]);
234 else if (bsd_type == target_netbsd)
235 ret = do_netbsd_syscall(env, syscall_nr,
236 env->regwptr[0], env->regwptr[1],
237 env->regwptr[2], env->regwptr[3],
238 env->regwptr[4], env->regwptr[5]);
239 else { //if (bsd_type == target_openbsd)
240 #if defined(TARGET_SPARC64)
241 syscall_nr &= ~(TARGET_OPENBSD_SYSCALL_G7RFLAG |
242 TARGET_OPENBSD_SYSCALL_G2RFLAG);
244 ret = do_openbsd_syscall(env, syscall_nr,
245 env->regwptr[0], env->regwptr[1],
246 env->regwptr[2], env->regwptr[3],
247 env->regwptr[4], env->regwptr[5]);
249 if ((unsigned int)ret >= (unsigned int)(-515)) {
250 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
251 env->xcc |= PSR_CARRY;
253 env->psr |= PSR_CARRY;
256 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
257 env->xcc &= ~PSR_CARRY;
259 env->psr &= ~PSR_CARRY;
262 env->regwptr[0] = ret;
263 /* next instruction */
264 #if defined(TARGET_SPARC64)
265 if (bsd_type == target_openbsd &&
266 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G2RFLAG) {
267 env->pc = env->gregs[2];
268 env->npc = env->pc + 4;
269 } else if (bsd_type == target_openbsd &&
270 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G7RFLAG) {
271 env->pc = env->gregs[7];
272 env->npc = env->pc + 4;
275 env->npc = env->npc + 4;
279 env->npc = env->npc + 4;
282 case 0x83: /* flush windows */
287 /* next instruction */
289 env->npc = env->npc + 4;
291 #ifndef TARGET_SPARC64
292 case TT_WIN_OVF: /* window overflow */
295 case TT_WIN_UNF: /* window underflow */
302 info.si_signo = SIGSEGV;
304 /* XXX: check env->error_code */
305 info.si_code = TARGET_SEGV_MAPERR;
306 info._sifields._sigfault._addr = env->mmuregs[4];
307 queue_signal(env, info.si_signo, &info);
312 case TT_SPILL: /* window overflow */
315 case TT_FILL: /* window underflow */
322 info.si_signo = SIGSEGV;
324 /* XXX: check env->error_code */
325 info.si_code = TARGET_SEGV_MAPERR;
326 if (trapnr == TT_DFAULT)
327 info._sifields._sigfault._addr = env->dmmuregs[4];
329 info._sifields._sigfault._addr = env->tsptr->tpc;
330 //queue_signal(env, info.si_signo, &info);
336 /* just indicate that signals should be handled asap */
342 sig = gdb_handlesig (env, TARGET_SIGTRAP);
348 info.si_code = TARGET_TRAP_BRKPT;
349 //queue_signal(env, info.si_signo, &info);
355 printf ("Unhandled trap: 0x%x\n", trapnr);
356 cpu_dump_state(env, stderr, fprintf, 0);
359 process_pending_signals (env);
365 static void usage(void)
367 printf("qemu-" TARGET_ARCH " version " QEMU_VERSION ", Copyright (c) 2003-2008 Fabrice Bellard\n"
368 "usage: qemu-" TARGET_ARCH " [options] program [arguments...]\n"
369 "BSD CPU emulator (compiled for %s emulation)\n"
371 "Standard options:\n"
372 "-h print this help\n"
373 "-g port wait gdb connection to port\n"
374 "-L path set the elf interpreter prefix (default=%s)\n"
375 "-s size set the stack size in bytes (default=%ld)\n"
376 "-cpu model select CPU (-cpu ? for list)\n"
377 "-drop-ld-preload drop LD_PRELOAD for target process\n"
378 "-bsd type select emulated BSD type FreeBSD/NetBSD/OpenBSD (default)\n"
381 "-d options activate log (logfile=%s)\n"
382 "-p pagesize set the host page size to 'pagesize'\n"
383 "-singlestep always run in singlestep mode\n"
384 "-strace log system calls\n"
386 "Environment variables:\n"
387 "QEMU_STRACE Print system calls and arguments similar to the\n"
388 " 'strace' program. Enable by setting to any value.\n"
397 THREAD CPUState *thread_env;
399 /* Assumes contents are already zeroed. */
400 void init_task_state(TaskState *ts)
405 ts->first_free = ts->sigqueue_table;
406 for (i = 0; i < MAX_SIGQUEUE_SIZE - 1; i++) {
407 ts->sigqueue_table[i].next = &ts->sigqueue_table[i + 1];
409 ts->sigqueue_table[i].next = NULL;
412 int main(int argc, char **argv)
414 const char *filename;
415 const char *cpu_model;
416 struct target_pt_regs regs1, *regs = ®s1;
417 struct image_info info1, *info = &info1;
418 TaskState ts1, *ts = &ts1;
422 int gdbstub_port = 0;
423 int drop_ld_preload = 0, environ_count = 0;
424 char **target_environ, **wrk, **dst;
425 enum BSDType bsd_type = target_openbsd;
431 cpu_set_log_filename(DEBUG_LOGFILE);
443 if (!strcmp(r, "-")) {
445 } else if (!strcmp(r, "d")) {
447 const CPULogItem *item;
453 mask = cpu_str_to_log_mask(r);
455 printf("Log items (comma separated):\n");
456 for(item = cpu_log_items; item->mask != 0; item++) {
457 printf("%-10s %s\n", item->name, item->help);
462 } else if (!strcmp(r, "s")) {
464 x86_stack_size = strtol(r, (char **)&r, 0);
465 if (x86_stack_size <= 0)
468 x86_stack_size *= 1024 * 1024;
469 else if (*r == 'k' || *r == 'K')
470 x86_stack_size *= 1024;
471 } else if (!strcmp(r, "L")) {
472 interp_prefix = argv[optind++];
473 } else if (!strcmp(r, "p")) {
474 qemu_host_page_size = atoi(argv[optind++]);
475 if (qemu_host_page_size == 0 ||
476 (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) {
477 fprintf(stderr, "page size must be a power of two\n");
480 } else if (!strcmp(r, "g")) {
481 gdbstub_port = atoi(argv[optind++]);
482 } else if (!strcmp(r, "r")) {
483 qemu_uname_release = argv[optind++];
484 } else if (!strcmp(r, "cpu")) {
485 cpu_model = argv[optind++];
486 if (strcmp(cpu_model, "?") == 0) {
487 /* XXX: implement xxx_cpu_list for targets that still miss it */
488 #if defined(cpu_list)
489 cpu_list(stdout, &fprintf);
493 } else if (!strcmp(r, "drop-ld-preload")) {
495 } else if (!strcmp(r, "bsd")) {
496 if (!strcasecmp(argv[optind], "freebsd")) {
497 bsd_type = target_freebsd;
498 } else if (!strcasecmp(argv[optind], "netbsd")) {
499 bsd_type = target_netbsd;
500 } else if (!strcasecmp(argv[optind], "openbsd")) {
501 bsd_type = target_openbsd;
506 } else if (!strcmp(r, "singlestep")) {
508 } else if (!strcmp(r, "strace")) {
517 filename = argv[optind];
520 memset(regs, 0, sizeof(struct target_pt_regs));
522 /* Zero out image_info */
523 memset(info, 0, sizeof(struct image_info));
525 /* Scan interp_prefix dir for replacement files. */
526 init_paths(interp_prefix);
528 if (cpu_model == NULL) {
529 #if defined(TARGET_SPARC)
530 #ifdef TARGET_SPARC64
531 cpu_model = "TI UltraSparc II";
533 cpu_model = "Fujitsu MB86904";
539 cpu_exec_init_all(0);
540 /* NOTE: we need to init the CPU at this stage to get
541 qemu_host_page_size */
542 env = cpu_init(cpu_model);
544 fprintf(stderr, "Unable to find CPU definition\n");
549 if (getenv("QEMU_STRACE")) {
557 target_environ = malloc((environ_count + 1) * sizeof(char *));
560 for (wrk = environ, dst = target_environ; *wrk; wrk++) {
561 if (drop_ld_preload && !strncmp(*wrk, "LD_PRELOAD=", 11))
563 *(dst++) = strdup(*wrk);
565 *dst = NULL; /* NULL terminate target_environ */
567 if (loader_exec(filename, argv+optind, target_environ, regs, info) != 0) {
568 printf("Error loading %s\n", filename);
572 for (wrk = target_environ; *wrk; wrk++) {
576 free(target_environ);
578 if (qemu_log_enabled()) {
581 qemu_log("start_brk 0x" TARGET_ABI_FMT_lx "\n", info->start_brk);
582 qemu_log("end_code 0x" TARGET_ABI_FMT_lx "\n", info->end_code);
583 qemu_log("start_code 0x" TARGET_ABI_FMT_lx "\n",
585 qemu_log("start_data 0x" TARGET_ABI_FMT_lx "\n",
587 qemu_log("end_data 0x" TARGET_ABI_FMT_lx "\n", info->end_data);
588 qemu_log("start_stack 0x" TARGET_ABI_FMT_lx "\n",
590 qemu_log("brk 0x" TARGET_ABI_FMT_lx "\n", info->brk);
591 qemu_log("entry 0x" TARGET_ABI_FMT_lx "\n", info->entry);
594 target_set_brk(info->brk);
598 /* build Task State */
599 memset(ts, 0, sizeof(TaskState));
604 #if defined(TARGET_SPARC)
608 env->npc = regs->npc;
610 for(i = 0; i < 8; i++)
611 env->gregs[i] = regs->u_regs[i];
612 for(i = 0; i < 8; i++)
613 env->regwptr[i] = regs->u_regs[i + 8];
616 #error unsupported target CPU
620 gdbserver_start (gdbstub_port);
621 gdb_handlesig(env, 0);
623 cpu_loop(env, bsd_type);