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"
36 static const char *interp_prefix = CONFIG_QEMU_PREFIX;
37 const char *qemu_uname_release = CONFIG_UNAME_RELEASE;
38 extern char **environ;
40 /* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so
41 we allocate a bigger stack. Need a better solution, for example
42 by remapping the process stack directly at the right place */
43 unsigned long x86_stack_size = 512 * 1024;
45 void gemu_log(const char *fmt, ...)
50 vfprintf(stderr, fmt, ap);
54 #define SPARC64_STACK_BIAS 2047
57 /* WARNING: dealing with register windows _is_ complicated. More info
58 can be found at http://www.sics.se/~psm/sparcstack.html */
59 static inline int get_reg_index(CPUSPARCState *env, int cwp, int index)
61 index = (index + cwp * 16) % (16 * env->nwindows);
62 /* wrap handling : if cwp is on the last window, then we use the
63 registers 'after' the end */
64 if (index < 8 && env->cwp == env->nwindows - 1)
65 index += 16 * env->nwindows;
69 /* save the register window 'cwp1' */
70 static inline void save_window_offset(CPUSPARCState *env, int cwp1)
75 sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)];
78 sp_ptr += SPARC64_STACK_BIAS;
80 #if defined(DEBUG_WIN)
81 printf("win_overflow: sp_ptr=0x" TARGET_ABI_FMT_lx " save_cwp=%d\n",
84 for(i = 0; i < 16; i++) {
85 /* FIXME - what to do if put_user() fails? */
86 put_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr);
87 sp_ptr += sizeof(abi_ulong);
91 static void save_window(CPUSPARCState *env)
93 #ifndef TARGET_SPARC64
95 new_wim = ((env->wim >> 1) | (env->wim << (env->nwindows - 1))) &
96 ((1LL << env->nwindows) - 1);
97 save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2));
100 save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2));
106 static void restore_window(CPUSPARCState *env)
108 #ifndef TARGET_SPARC64
109 unsigned int new_wim;
111 unsigned int i, cwp1;
114 #ifndef TARGET_SPARC64
115 new_wim = ((env->wim << 1) | (env->wim >> (env->nwindows - 1))) &
116 ((1LL << env->nwindows) - 1);
119 /* restore the invalid window */
120 cwp1 = cpu_cwp_inc(env, env->cwp + 1);
121 sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)];
122 #ifdef TARGET_SPARC64
124 sp_ptr += SPARC64_STACK_BIAS;
126 #if defined(DEBUG_WIN)
127 printf("win_underflow: sp_ptr=0x" TARGET_ABI_FMT_lx " load_cwp=%d\n",
130 for(i = 0; i < 16; i++) {
131 /* FIXME - what to do if get_user() fails? */
132 get_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr);
133 sp_ptr += sizeof(abi_ulong);
135 #ifdef TARGET_SPARC64
137 if (env->cleanwin < env->nwindows - 1)
145 static void flush_windows(CPUSPARCState *env)
151 /* if restore would invoke restore_window(), then we can stop */
152 cwp1 = cpu_cwp_inc(env, env->cwp + offset);
153 #ifndef TARGET_SPARC64
154 if (env->wim & (1 << cwp1))
157 if (env->canrestore == 0)
162 save_window_offset(env, cwp1);
165 cwp1 = cpu_cwp_inc(env, env->cwp + 1);
166 #ifndef TARGET_SPARC64
167 /* set wim so that restore will reload the registers */
168 env->wim = 1 << cwp1;
170 #if defined(DEBUG_WIN)
171 printf("flush_windows: nb=%d\n", offset - 1);
175 void cpu_loop(CPUSPARCState *env, enum BSDType bsd_type)
177 int trapnr, ret, syscall_nr;
178 //target_siginfo_t info;
181 trapnr = cpu_sparc_exec (env);
184 #ifndef TARGET_SPARC64
189 syscall_nr = env->gregs[1];
190 if (bsd_type == target_freebsd)
191 ret = do_freebsd_syscall(env, syscall_nr,
192 env->regwptr[0], env->regwptr[1],
193 env->regwptr[2], env->regwptr[3],
194 env->regwptr[4], env->regwptr[5]);
195 else if (bsd_type == target_netbsd)
196 ret = do_netbsd_syscall(env, syscall_nr,
197 env->regwptr[0], env->regwptr[1],
198 env->regwptr[2], env->regwptr[3],
199 env->regwptr[4], env->regwptr[5]);
200 else { //if (bsd_type == target_openbsd)
201 #if defined(TARGET_SPARC64)
202 syscall_nr &= ~(TARGET_OPENBSD_SYSCALL_G7RFLAG |
203 TARGET_OPENBSD_SYSCALL_G2RFLAG);
205 ret = do_openbsd_syscall(env, syscall_nr,
206 env->regwptr[0], env->regwptr[1],
207 env->regwptr[2], env->regwptr[3],
208 env->regwptr[4], env->regwptr[5]);
210 if ((unsigned int)ret >= (unsigned int)(-515)) {
211 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
212 env->xcc |= PSR_CARRY;
214 env->psr |= PSR_CARRY;
217 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
218 env->xcc &= ~PSR_CARRY;
220 env->psr &= ~PSR_CARRY;
223 env->regwptr[0] = ret;
224 /* next instruction */
225 #if defined(TARGET_SPARC64)
226 if (bsd_type == target_openbsd &&
227 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G2RFLAG) {
228 env->pc = env->gregs[2];
229 env->npc = env->pc + 4;
230 } else if (bsd_type == target_openbsd &&
231 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G7RFLAG) {
232 env->pc = env->gregs[7];
233 env->npc = env->pc + 4;
236 env->npc = env->npc + 4;
240 env->npc = env->npc + 4;
243 case 0x83: /* flush windows */
248 /* next instruction */
250 env->npc = env->npc + 4;
252 #ifndef TARGET_SPARC64
253 case TT_WIN_OVF: /* window overflow */
256 case TT_WIN_UNF: /* window underflow */
263 info.si_signo = SIGSEGV;
265 /* XXX: check env->error_code */
266 info.si_code = TARGET_SEGV_MAPERR;
267 info._sifields._sigfault._addr = env->mmuregs[4];
268 queue_signal(env, info.si_signo, &info);
273 case TT_SPILL: /* window overflow */
276 case TT_FILL: /* window underflow */
283 info.si_signo = SIGSEGV;
285 /* XXX: check env->error_code */
286 info.si_code = TARGET_SEGV_MAPERR;
287 if (trapnr == TT_DFAULT)
288 info._sifields._sigfault._addr = env->dmmuregs[4];
290 info._sifields._sigfault._addr = env->tsptr->tpc;
291 //queue_signal(env, info.si_signo, &info);
297 /* just indicate that signals should be handled asap */
303 sig = gdb_handlesig (env, TARGET_SIGTRAP);
309 info.si_code = TARGET_TRAP_BRKPT;
310 //queue_signal(env, info.si_signo, &info);
316 printf ("Unhandled trap: 0x%x\n", trapnr);
317 cpu_dump_state(env, stderr, fprintf, 0);
320 process_pending_signals (env);
326 static void usage(void)
328 printf("qemu-" TARGET_ARCH " version " QEMU_VERSION ", Copyright (c) 2003-2008 Fabrice Bellard\n"
329 "usage: qemu-" TARGET_ARCH " [options] program [arguments...]\n"
330 "BSD CPU emulator (compiled for %s emulation)\n"
332 "Standard options:\n"
333 "-h print this help\n"
334 "-g port wait gdb connection to port\n"
335 "-L path set the elf interpreter prefix (default=%s)\n"
336 "-s size set the stack size in bytes (default=%ld)\n"
337 "-cpu model select CPU (-cpu ? for list)\n"
338 "-drop-ld-preload drop LD_PRELOAD for target process\n"
339 "-bsd type select emulated BSD type FreeBSD/NetBSD/OpenBSD (default)\n"
342 "-d options activate log (logfile=%s)\n"
343 "-p pagesize set the host page size to 'pagesize'\n"
344 "-strace log system calls\n"
346 "Environment variables:\n"
347 "QEMU_STRACE Print system calls and arguments similar to the\n"
348 " 'strace' program. Enable by setting to any value.\n"
357 THREAD CPUState *thread_env;
359 /* Assumes contents are already zeroed. */
360 void init_task_state(TaskState *ts)
365 ts->first_free = ts->sigqueue_table;
366 for (i = 0; i < MAX_SIGQUEUE_SIZE - 1; i++) {
367 ts->sigqueue_table[i].next = &ts->sigqueue_table[i + 1];
369 ts->sigqueue_table[i].next = NULL;
372 int main(int argc, char **argv)
374 const char *filename;
375 const char *cpu_model;
376 struct target_pt_regs regs1, *regs = ®s1;
377 struct image_info info1, *info = &info1;
378 TaskState ts1, *ts = &ts1;
382 int gdbstub_port = 0;
383 int drop_ld_preload = 0, environ_count = 0;
384 char **target_environ, **wrk, **dst;
385 enum BSDType bsd_type = target_openbsd;
391 cpu_set_log_filename(DEBUG_LOGFILE);
403 if (!strcmp(r, "-")) {
405 } else if (!strcmp(r, "d")) {
407 const CPULogItem *item;
413 mask = cpu_str_to_log_mask(r);
415 printf("Log items (comma separated):\n");
416 for(item = cpu_log_items; item->mask != 0; item++) {
417 printf("%-10s %s\n", item->name, item->help);
422 } else if (!strcmp(r, "s")) {
424 x86_stack_size = strtol(r, (char **)&r, 0);
425 if (x86_stack_size <= 0)
428 x86_stack_size *= 1024 * 1024;
429 else if (*r == 'k' || *r == 'K')
430 x86_stack_size *= 1024;
431 } else if (!strcmp(r, "L")) {
432 interp_prefix = argv[optind++];
433 } else if (!strcmp(r, "p")) {
434 qemu_host_page_size = atoi(argv[optind++]);
435 if (qemu_host_page_size == 0 ||
436 (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) {
437 fprintf(stderr, "page size must be a power of two\n");
440 } else if (!strcmp(r, "g")) {
441 gdbstub_port = atoi(argv[optind++]);
442 } else if (!strcmp(r, "r")) {
443 qemu_uname_release = argv[optind++];
444 } else if (!strcmp(r, "cpu")) {
445 cpu_model = argv[optind++];
446 if (strcmp(cpu_model, "?") == 0) {
447 /* XXX: implement xxx_cpu_list for targets that still miss it */
448 #if defined(cpu_list)
449 cpu_list(stdout, &fprintf);
453 } else if (!strcmp(r, "drop-ld-preload")) {
455 } else if (!strcmp(r, "bsd")) {
456 if (!strcasecmp(argv[optind], "freebsd")) {
457 bsd_type = target_freebsd;
458 } else if (!strcasecmp(argv[optind], "netbsd")) {
459 bsd_type = target_netbsd;
460 } else if (!strcasecmp(argv[optind], "openbsd")) {
461 bsd_type = target_openbsd;
466 } else if (!strcmp(r, "strace")) {
475 filename = argv[optind];
478 memset(regs, 0, sizeof(struct target_pt_regs));
480 /* Zero out image_info */
481 memset(info, 0, sizeof(struct image_info));
483 /* Scan interp_prefix dir for replacement files. */
484 init_paths(interp_prefix);
486 if (cpu_model == NULL) {
487 #if defined(TARGET_SPARC)
488 #ifdef TARGET_SPARC64
489 cpu_model = "TI UltraSparc II";
491 cpu_model = "Fujitsu MB86904";
497 cpu_exec_init_all(0);
498 /* NOTE: we need to init the CPU at this stage to get
499 qemu_host_page_size */
500 env = cpu_init(cpu_model);
502 fprintf(stderr, "Unable to find CPU definition\n");
507 if (getenv("QEMU_STRACE")) {
515 target_environ = malloc((environ_count + 1) * sizeof(char *));
518 for (wrk = environ, dst = target_environ; *wrk; wrk++) {
519 if (drop_ld_preload && !strncmp(*wrk, "LD_PRELOAD=", 11))
521 *(dst++) = strdup(*wrk);
523 *dst = NULL; /* NULL terminate target_environ */
525 if (loader_exec(filename, argv+optind, target_environ, regs, info) != 0) {
526 printf("Error loading %s\n", filename);
530 for (wrk = target_environ; *wrk; wrk++) {
534 free(target_environ);
538 qemu_log("start_brk 0x" TARGET_ABI_FMT_lx "\n", info->start_brk);
539 qemu_log("end_code 0x" TARGET_ABI_FMT_lx "\n", info->end_code);
540 qemu_log("start_code 0x" TARGET_ABI_FMT_lx "\n",
542 qemu_log("start_data 0x" TARGET_ABI_FMT_lx "\n",
544 qemu_log("end_data 0x" TARGET_ABI_FMT_lx "\n", info->end_data);
545 qemu_log("start_stack 0x" TARGET_ABI_FMT_lx "\n",
547 qemu_log("brk 0x" TARGET_ABI_FMT_lx "\n", info->brk);
548 qemu_log("entry 0x" TARGET_ABI_FMT_lx "\n", info->entry);
550 target_set_brk(info->brk);
554 /* build Task State */
555 memset(ts, 0, sizeof(TaskState));
560 #if defined(TARGET_SPARC)
564 env->npc = regs->npc;
566 for(i = 0; i < 8; i++)
567 env->gregs[i] = regs->u_regs[i];
568 for(i = 0; i < 8; i++)
569 env->regwptr[i] = regs->u_regs[i + 8];
572 #error unsupported target CPU
576 gdbserver_start (gdbstub_port);
577 gdb_handlesig(env, 0);
579 cpu_loop(env, bsd_type);