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, see <http://www.gnu.org/licenses/>.
19 #include "qemu/osdep.h"
20 #include <machine/trap.h>
24 #include "qemu/path.h"
25 #include "qemu/help_option.h"
29 #include "qemu/timer.h"
30 #include "qemu/envlist.h"
34 unsigned long mmap_min_addr;
35 unsigned long guest_base;
37 unsigned long reserved_va;
39 static const char *interp_prefix = CONFIG_QEMU_INTERP_PREFIX;
40 const char *qemu_uname_release;
41 extern char **environ;
42 enum BSDType bsd_type;
44 /* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so
45 we allocate a bigger stack. Need a better solution, for example
46 by remapping the process stack directly at the right place */
47 unsigned long x86_stack_size = 512 * 1024;
49 void gemu_log(const char *fmt, ...)
54 vfprintf(stderr, fmt, ap);
58 #if defined(TARGET_I386)
59 int cpu_get_pic_interrupt(CPUX86State *env)
65 /* These are no-ops because we are not threadsafe. */
66 static inline void cpu_exec_start(CPUArchState *env)
70 static inline void cpu_exec_end(CPUArchState *env)
74 static inline void start_exclusive(void)
78 static inline void end_exclusive(void)
86 void fork_end(int child)
89 gdbserver_fork(thread_cpu);
93 void cpu_list_lock(void)
97 void cpu_list_unlock(void)
102 /***********************************************************/
103 /* CPUX86 core interface */
105 uint64_t cpu_get_tsc(CPUX86State *env)
107 return cpu_get_host_ticks();
110 static void write_dt(void *ptr, unsigned long addr, unsigned long limit,
115 e1 = (addr << 16) | (limit & 0xffff);
116 e2 = ((addr >> 16) & 0xff) | (addr & 0xff000000) | (limit & 0x000f0000);
123 static uint64_t *idt_table;
125 static void set_gate64(void *ptr, unsigned int type, unsigned int dpl,
126 uint64_t addr, unsigned int sel)
129 e1 = (addr & 0xffff) | (sel << 16);
130 e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
134 p[2] = tswap32(addr >> 32);
137 /* only dpl matters as we do only user space emulation */
138 static void set_idt(int n, unsigned int dpl)
140 set_gate64(idt_table + n * 2, 0, dpl, 0, 0);
143 static void set_gate(void *ptr, unsigned int type, unsigned int dpl,
144 uint32_t addr, unsigned int sel)
147 e1 = (addr & 0xffff) | (sel << 16);
148 e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
154 /* only dpl matters as we do only user space emulation */
155 static void set_idt(int n, unsigned int dpl)
157 set_gate(idt_table + n, 0, dpl, 0, 0);
161 void cpu_loop(CPUX86State *env)
163 X86CPU *cpu = x86_env_get_cpu(env);
164 CPUState *cs = CPU(cpu);
167 //target_siginfo_t info;
170 trapnr = cpu_x86_exec(cs);
173 /* syscall from int $0x80 */
174 if (bsd_type == target_freebsd) {
175 abi_ulong params = (abi_ulong) env->regs[R_ESP] +
177 int32_t syscall_nr = env->regs[R_EAX];
178 int32_t arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8;
180 if (syscall_nr == TARGET_FREEBSD_NR_syscall) {
181 get_user_s32(syscall_nr, params);
182 params += sizeof(int32_t);
183 } else if (syscall_nr == TARGET_FREEBSD_NR___syscall) {
184 get_user_s32(syscall_nr, params);
185 params += sizeof(int64_t);
187 get_user_s32(arg1, params);
188 params += sizeof(int32_t);
189 get_user_s32(arg2, params);
190 params += sizeof(int32_t);
191 get_user_s32(arg3, params);
192 params += sizeof(int32_t);
193 get_user_s32(arg4, params);
194 params += sizeof(int32_t);
195 get_user_s32(arg5, params);
196 params += sizeof(int32_t);
197 get_user_s32(arg6, params);
198 params += sizeof(int32_t);
199 get_user_s32(arg7, params);
200 params += sizeof(int32_t);
201 get_user_s32(arg8, params);
202 env->regs[R_EAX] = do_freebsd_syscall(env,
212 } else { //if (bsd_type == target_openbsd)
213 env->regs[R_EAX] = do_openbsd_syscall(env,
222 if (((abi_ulong)env->regs[R_EAX]) >= (abi_ulong)(-515)) {
223 env->regs[R_EAX] = -env->regs[R_EAX];
226 env->eflags &= ~CC_C;
231 /* syscall from syscall instruction */
232 if (bsd_type == target_freebsd)
233 env->regs[R_EAX] = do_freebsd_syscall(env,
241 else { //if (bsd_type == target_openbsd)
242 env->regs[R_EAX] = do_openbsd_syscall(env,
251 env->eip = env->exception_next_eip;
252 if (((abi_ulong)env->regs[R_EAX]) >= (abi_ulong)(-515)) {
253 env->regs[R_EAX] = -env->regs[R_EAX];
256 env->eflags &= ~CC_C;
263 info.si_signo = SIGBUS;
265 info.si_code = TARGET_SI_KERNEL;
266 info._sifields._sigfault._addr = 0;
267 queue_signal(env, info.si_signo, &info);
270 /* XXX: potential problem if ABI32 */
271 #ifndef TARGET_X86_64
272 if (env->eflags & VM_MASK) {
273 handle_vm86_fault(env);
277 info.si_signo = SIGSEGV;
279 info.si_code = TARGET_SI_KERNEL;
280 info._sifields._sigfault._addr = 0;
281 queue_signal(env, info.si_signo, &info);
285 info.si_signo = SIGSEGV;
287 if (!(env->error_code & 1))
288 info.si_code = TARGET_SEGV_MAPERR;
290 info.si_code = TARGET_SEGV_ACCERR;
291 info._sifields._sigfault._addr = env->cr[2];
292 queue_signal(env, info.si_signo, &info);
295 #ifndef TARGET_X86_64
296 if (env->eflags & VM_MASK) {
297 handle_vm86_trap(env, trapnr);
301 /* division by zero */
302 info.si_signo = SIGFPE;
304 info.si_code = TARGET_FPE_INTDIV;
305 info._sifields._sigfault._addr = env->eip;
306 queue_signal(env, info.si_signo, &info);
311 #ifndef TARGET_X86_64
312 if (env->eflags & VM_MASK) {
313 handle_vm86_trap(env, trapnr);
317 info.si_signo = SIGTRAP;
319 if (trapnr == EXCP01_DB) {
320 info.si_code = TARGET_TRAP_BRKPT;
321 info._sifields._sigfault._addr = env->eip;
323 info.si_code = TARGET_SI_KERNEL;
324 info._sifields._sigfault._addr = 0;
326 queue_signal(env, info.si_signo, &info);
331 #ifndef TARGET_X86_64
332 if (env->eflags & VM_MASK) {
333 handle_vm86_trap(env, trapnr);
337 info.si_signo = SIGSEGV;
339 info.si_code = TARGET_SI_KERNEL;
340 info._sifields._sigfault._addr = 0;
341 queue_signal(env, info.si_signo, &info);
345 info.si_signo = SIGILL;
347 info.si_code = TARGET_ILL_ILLOPN;
348 info._sifields._sigfault._addr = env->eip;
349 queue_signal(env, info.si_signo, &info);
353 /* just indicate that signals should be handled asap */
360 sig = gdb_handlesig (env, TARGET_SIGTRAP);
365 info.si_code = TARGET_TRAP_BRKPT;
366 queue_signal(env, info.si_signo, &info);
372 pc = env->segs[R_CS].base + env->eip;
373 fprintf(stderr, "qemu: 0x%08lx: unhandled CPU exception 0x%x - aborting\n",
377 process_pending_signals(env);
383 #define SPARC64_STACK_BIAS 2047
386 /* WARNING: dealing with register windows _is_ complicated. More info
387 can be found at http://www.sics.se/~psm/sparcstack.html */
388 static inline int get_reg_index(CPUSPARCState *env, int cwp, int index)
390 index = (index + cwp * 16) % (16 * env->nwindows);
391 /* wrap handling : if cwp is on the last window, then we use the
392 registers 'after' the end */
393 if (index < 8 && env->cwp == env->nwindows - 1)
394 index += 16 * env->nwindows;
398 /* save the register window 'cwp1' */
399 static inline void save_window_offset(CPUSPARCState *env, int cwp1)
404 sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)];
405 #ifdef TARGET_SPARC64
407 sp_ptr += SPARC64_STACK_BIAS;
409 #if defined(DEBUG_WIN)
410 printf("win_overflow: sp_ptr=0x" TARGET_ABI_FMT_lx " save_cwp=%d\n",
413 for(i = 0; i < 16; i++) {
414 /* FIXME - what to do if put_user() fails? */
415 put_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr);
416 sp_ptr += sizeof(abi_ulong);
420 static void save_window(CPUSPARCState *env)
422 #ifndef TARGET_SPARC64
423 unsigned int new_wim;
424 new_wim = ((env->wim >> 1) | (env->wim << (env->nwindows - 1))) &
425 ((1LL << env->nwindows) - 1);
426 save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2));
429 save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2));
435 static void restore_window(CPUSPARCState *env)
437 #ifndef TARGET_SPARC64
438 unsigned int new_wim;
440 unsigned int i, cwp1;
443 #ifndef TARGET_SPARC64
444 new_wim = ((env->wim << 1) | (env->wim >> (env->nwindows - 1))) &
445 ((1LL << env->nwindows) - 1);
448 /* restore the invalid window */
449 cwp1 = cpu_cwp_inc(env, env->cwp + 1);
450 sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)];
451 #ifdef TARGET_SPARC64
453 sp_ptr += SPARC64_STACK_BIAS;
455 #if defined(DEBUG_WIN)
456 printf("win_underflow: sp_ptr=0x" TARGET_ABI_FMT_lx " load_cwp=%d\n",
459 for(i = 0; i < 16; i++) {
460 /* FIXME - what to do if get_user() fails? */
461 get_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr);
462 sp_ptr += sizeof(abi_ulong);
464 #ifdef TARGET_SPARC64
466 if (env->cleanwin < env->nwindows - 1)
474 static void flush_windows(CPUSPARCState *env)
480 /* if restore would invoke restore_window(), then we can stop */
481 cwp1 = cpu_cwp_inc(env, env->cwp + offset);
482 #ifndef TARGET_SPARC64
483 if (env->wim & (1 << cwp1))
486 if (env->canrestore == 0)
491 save_window_offset(env, cwp1);
494 cwp1 = cpu_cwp_inc(env, env->cwp + 1);
495 #ifndef TARGET_SPARC64
496 /* set wim so that restore will reload the registers */
497 env->wim = 1 << cwp1;
499 #if defined(DEBUG_WIN)
500 printf("flush_windows: nb=%d\n", offset - 1);
504 void cpu_loop(CPUSPARCState *env)
506 CPUState *cs = CPU(sparc_env_get_cpu(env));
507 int trapnr, ret, syscall_nr;
508 //target_siginfo_t info;
511 trapnr = cpu_sparc_exec(cs);
514 #ifndef TARGET_SPARC64
517 /* FreeBSD uses 0x141 for syscalls too */
519 if (bsd_type != target_freebsd)
523 syscall_nr = env->gregs[1];
524 if (bsd_type == target_freebsd)
525 ret = do_freebsd_syscall(env, syscall_nr,
526 env->regwptr[0], env->regwptr[1],
527 env->regwptr[2], env->regwptr[3],
528 env->regwptr[4], env->regwptr[5], 0, 0);
529 else if (bsd_type == target_netbsd)
530 ret = do_netbsd_syscall(env, syscall_nr,
531 env->regwptr[0], env->regwptr[1],
532 env->regwptr[2], env->regwptr[3],
533 env->regwptr[4], env->regwptr[5]);
534 else { //if (bsd_type == target_openbsd)
535 #if defined(TARGET_SPARC64)
536 syscall_nr &= ~(TARGET_OPENBSD_SYSCALL_G7RFLAG |
537 TARGET_OPENBSD_SYSCALL_G2RFLAG);
539 ret = do_openbsd_syscall(env, syscall_nr,
540 env->regwptr[0], env->regwptr[1],
541 env->regwptr[2], env->regwptr[3],
542 env->regwptr[4], env->regwptr[5]);
544 if ((unsigned int)ret >= (unsigned int)(-515)) {
546 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
547 env->xcc |= PSR_CARRY;
549 env->psr |= PSR_CARRY;
552 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
553 env->xcc &= ~PSR_CARRY;
555 env->psr &= ~PSR_CARRY;
558 env->regwptr[0] = ret;
559 /* next instruction */
560 #if defined(TARGET_SPARC64)
561 if (bsd_type == target_openbsd &&
562 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G2RFLAG) {
563 env->pc = env->gregs[2];
564 env->npc = env->pc + 4;
565 } else if (bsd_type == target_openbsd &&
566 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G7RFLAG) {
567 env->pc = env->gregs[7];
568 env->npc = env->pc + 4;
571 env->npc = env->npc + 4;
575 env->npc = env->npc + 4;
578 case 0x83: /* flush windows */
583 /* next instruction */
585 env->npc = env->npc + 4;
587 #ifndef TARGET_SPARC64
588 case TT_WIN_OVF: /* window overflow */
591 case TT_WIN_UNF: /* window underflow */
598 info.si_signo = SIGSEGV;
600 /* XXX: check env->error_code */
601 info.si_code = TARGET_SEGV_MAPERR;
602 info._sifields._sigfault._addr = env->mmuregs[4];
603 queue_signal(env, info.si_signo, &info);
608 case TT_SPILL: /* window overflow */
611 case TT_FILL: /* window underflow */
618 info.si_signo = SIGSEGV;
620 /* XXX: check env->error_code */
621 info.si_code = TARGET_SEGV_MAPERR;
622 if (trapnr == TT_DFAULT)
623 info._sifields._sigfault._addr = env->dmmuregs[4];
625 info._sifields._sigfault._addr = env->tsptr->tpc;
626 //queue_signal(env, info.si_signo, &info);
632 /* just indicate that signals should be handled asap */
638 sig = gdb_handlesig(cs, TARGET_SIGTRAP);
644 info.si_code = TARGET_TRAP_BRKPT;
645 //queue_signal(env, info.si_signo, &info);
651 #ifdef TARGET_SPARC64
654 printf ("Unhandled trap: 0x%x\n", trapnr);
655 cpu_dump_state(cs, stderr, fprintf, 0);
658 process_pending_signals (env);
664 static void usage(void)
666 printf("qemu-" TARGET_NAME " version " QEMU_VERSION ", Copyright (c) 2003-2008 Fabrice Bellard\n"
667 "usage: qemu-" TARGET_NAME " [options] program [arguments...]\n"
668 "BSD CPU emulator (compiled for %s emulation)\n"
670 "Standard options:\n"
671 "-h print this help\n"
672 "-g port wait gdb connection to port\n"
673 "-L path set the elf interpreter prefix (default=%s)\n"
674 "-s size set the stack size in bytes (default=%ld)\n"
675 "-cpu model select CPU (-cpu help for list)\n"
676 "-drop-ld-preload drop LD_PRELOAD for target process\n"
677 "-E var=value sets/modifies targets environment variable(s)\n"
678 "-U var unsets targets environment variable(s)\n"
679 "-B address set guest_base address to address\n"
680 "-bsd type select emulated BSD type FreeBSD/NetBSD/OpenBSD (default)\n"
683 "-d item1[,...] enable logging of specified items\n"
684 " (use '-d help' for a list of log items)\n"
685 "-D logfile write logs to 'logfile' (default stderr)\n"
686 "-p pagesize set the host page size to 'pagesize'\n"
687 "-singlestep always run in singlestep mode\n"
688 "-strace log system calls\n"
690 "Environment variables:\n"
691 "QEMU_STRACE Print system calls and arguments similar to the\n"
692 " 'strace' program. Enable by setting to any value.\n"
693 "You can use -E and -U options to set/unset environment variables\n"
694 "for target process. It is possible to provide several variables\n"
695 "by repeating the option. For example:\n"
696 " -E var1=val2 -E var2=val2 -U LD_PRELOAD -U LD_DEBUG\n"
697 "Note that if you provide several changes to single variable\n"
698 "last change will stay in effect.\n"
706 THREAD CPUState *thread_cpu;
708 /* Assumes contents are already zeroed. */
709 void init_task_state(TaskState *ts)
714 ts->first_free = ts->sigqueue_table;
715 for (i = 0; i < MAX_SIGQUEUE_SIZE - 1; i++) {
716 ts->sigqueue_table[i].next = &ts->sigqueue_table[i + 1];
718 ts->sigqueue_table[i].next = NULL;
721 int main(int argc, char **argv)
723 const char *filename;
724 const char *cpu_model;
725 const char *log_file = NULL;
726 const char *log_mask = NULL;
727 struct target_pt_regs regs1, *regs = ®s1;
728 struct image_info info1, *info = &info1;
729 TaskState ts1, *ts = &ts1;
734 int gdbstub_port = 0;
735 char **target_environ, **wrk;
736 envlist_t *envlist = NULL;
737 bsd_type = target_openbsd;
742 module_call_init(MODULE_INIT_QOM);
744 if ((envlist = envlist_create()) == NULL) {
745 (void) fprintf(stderr, "Unable to allocate envlist\n");
749 /* add current environment into the list */
750 for (wrk = environ; *wrk != NULL; wrk++) {
751 (void) envlist_setenv(envlist, *wrk);
755 #if defined(cpudef_setup)
756 cpudef_setup(); /* parse cpu definitions in target config file (TBD) */
768 if (!strcmp(r, "-")) {
770 } else if (!strcmp(r, "d")) {
771 if (optind >= argc) {
774 log_mask = argv[optind++];
775 } else if (!strcmp(r, "D")) {
776 if (optind >= argc) {
779 log_file = argv[optind++];
780 } else if (!strcmp(r, "E")) {
782 if (envlist_setenv(envlist, r) != 0)
784 } else if (!strcmp(r, "ignore-environment")) {
785 envlist_free(envlist);
786 if ((envlist = envlist_create()) == NULL) {
787 (void) fprintf(stderr, "Unable to allocate envlist\n");
790 } else if (!strcmp(r, "U")) {
792 if (envlist_unsetenv(envlist, r) != 0)
794 } else if (!strcmp(r, "s")) {
796 x86_stack_size = strtol(r, (char **)&r, 0);
797 if (x86_stack_size <= 0)
800 x86_stack_size *= 1024 * 1024;
801 else if (*r == 'k' || *r == 'K')
802 x86_stack_size *= 1024;
803 } else if (!strcmp(r, "L")) {
804 interp_prefix = argv[optind++];
805 } else if (!strcmp(r, "p")) {
806 qemu_host_page_size = atoi(argv[optind++]);
807 if (qemu_host_page_size == 0 ||
808 (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) {
809 fprintf(stderr, "page size must be a power of two\n");
812 } else if (!strcmp(r, "g")) {
813 gdbstub_port = atoi(argv[optind++]);
814 } else if (!strcmp(r, "r")) {
815 qemu_uname_release = argv[optind++];
816 } else if (!strcmp(r, "cpu")) {
817 cpu_model = argv[optind++];
818 if (is_help_option(cpu_model)) {
819 /* XXX: implement xxx_cpu_list for targets that still miss it */
820 #if defined(cpu_list)
821 cpu_list(stdout, &fprintf);
825 } else if (!strcmp(r, "B")) {
826 guest_base = strtol(argv[optind++], NULL, 0);
828 } else if (!strcmp(r, "drop-ld-preload")) {
829 (void) envlist_unsetenv(envlist, "LD_PRELOAD");
830 } else if (!strcmp(r, "bsd")) {
831 if (!strcasecmp(argv[optind], "freebsd")) {
832 bsd_type = target_freebsd;
833 } else if (!strcasecmp(argv[optind], "netbsd")) {
834 bsd_type = target_netbsd;
835 } else if (!strcasecmp(argv[optind], "openbsd")) {
836 bsd_type = target_openbsd;
841 } else if (!strcmp(r, "singlestep")) {
843 } else if (!strcmp(r, "strace")) {
852 qemu_set_log_filename(log_file);
856 mask = qemu_str_to_log_mask(log_mask);
858 qemu_print_log_usage(stdout);
864 if (optind >= argc) {
867 filename = argv[optind];
870 memset(regs, 0, sizeof(struct target_pt_regs));
872 /* Zero out image_info */
873 memset(info, 0, sizeof(struct image_info));
875 /* Scan interp_prefix dir for replacement files. */
876 init_paths(interp_prefix);
878 if (cpu_model == NULL) {
879 #if defined(TARGET_I386)
881 cpu_model = "qemu64";
883 cpu_model = "qemu32";
885 #elif defined(TARGET_SPARC)
886 #ifdef TARGET_SPARC64
887 cpu_model = "TI UltraSparc II";
889 cpu_model = "Fujitsu MB86904";
896 /* NOTE: we need to init the CPU at this stage to get
897 qemu_host_page_size */
898 cpu = cpu_init(cpu_model);
900 fprintf(stderr, "Unable to find CPU definition\n");
904 #if defined(TARGET_SPARC) || defined(TARGET_PPC)
909 if (getenv("QEMU_STRACE")) {
913 target_environ = envlist_to_environ(envlist, NULL);
914 envlist_free(envlist);
917 * Now that page sizes are configured in cpu_init() we can do
918 * proper page alignment for guest_base.
920 guest_base = HOST_PAGE_ALIGN(guest_base);
923 * Read in mmap_min_addr kernel parameter. This value is used
924 * When loading the ELF image to determine whether guest_base
927 * When user has explicitly set the quest base, we skip this
930 if (!have_guest_base) {
933 if ((fp = fopen("/proc/sys/vm/mmap_min_addr", "r")) != NULL) {
935 if (fscanf(fp, "%lu", &tmp) == 1) {
937 qemu_log_mask(CPU_LOG_PAGE, "host mmap_min_addr=0x%lx\n", mmap_min_addr);
943 if (loader_exec(filename, argv+optind, target_environ, regs, info) != 0) {
944 printf("Error loading %s\n", filename);
948 for (wrk = target_environ; *wrk; wrk++) {
952 free(target_environ);
954 if (qemu_loglevel_mask(CPU_LOG_PAGE)) {
955 qemu_log("guest_base 0x%lx\n", guest_base);
958 qemu_log("start_brk 0x" TARGET_ABI_FMT_lx "\n", info->start_brk);
959 qemu_log("end_code 0x" TARGET_ABI_FMT_lx "\n", info->end_code);
960 qemu_log("start_code 0x" TARGET_ABI_FMT_lx "\n",
962 qemu_log("start_data 0x" TARGET_ABI_FMT_lx "\n",
964 qemu_log("end_data 0x" TARGET_ABI_FMT_lx "\n", info->end_data);
965 qemu_log("start_stack 0x" TARGET_ABI_FMT_lx "\n",
967 qemu_log("brk 0x" TARGET_ABI_FMT_lx "\n", info->brk);
968 qemu_log("entry 0x" TARGET_ABI_FMT_lx "\n", info->entry);
971 target_set_brk(info->brk);
975 /* Now that we've loaded the binary, GUEST_BASE is fixed. Delay
976 generating the prologue until now so that the prologue can take
977 the real value of GUEST_BASE into account. */
978 tcg_prologue_init(&tcg_ctx);
980 /* build Task State */
981 memset(ts, 0, sizeof(TaskState));
986 #if defined(TARGET_I386)
987 env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK;
988 env->hflags |= HF_PE_MASK | HF_CPL_MASK;
989 if (env->features[FEAT_1_EDX] & CPUID_SSE) {
990 env->cr[4] |= CR4_OSFXSR_MASK;
991 env->hflags |= HF_OSFXSR_MASK;
994 /* enable 64 bit mode if possible */
995 if (!(env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_LM)) {
996 fprintf(stderr, "The selected x86 CPU does not support 64 bit mode\n");
999 env->cr[4] |= CR4_PAE_MASK;
1000 env->efer |= MSR_EFER_LMA | MSR_EFER_LME;
1001 env->hflags |= HF_LMA_MASK;
1004 /* flags setup : we activate the IRQs by default as in user mode */
1005 env->eflags |= IF_MASK;
1007 /* linux register setup */
1008 #ifndef TARGET_ABI32
1009 env->regs[R_EAX] = regs->rax;
1010 env->regs[R_EBX] = regs->rbx;
1011 env->regs[R_ECX] = regs->rcx;
1012 env->regs[R_EDX] = regs->rdx;
1013 env->regs[R_ESI] = regs->rsi;
1014 env->regs[R_EDI] = regs->rdi;
1015 env->regs[R_EBP] = regs->rbp;
1016 env->regs[R_ESP] = regs->rsp;
1017 env->eip = regs->rip;
1019 env->regs[R_EAX] = regs->eax;
1020 env->regs[R_EBX] = regs->ebx;
1021 env->regs[R_ECX] = regs->ecx;
1022 env->regs[R_EDX] = regs->edx;
1023 env->regs[R_ESI] = regs->esi;
1024 env->regs[R_EDI] = regs->edi;
1025 env->regs[R_EBP] = regs->ebp;
1026 env->regs[R_ESP] = regs->esp;
1027 env->eip = regs->eip;
1030 /* linux interrupt setup */
1031 #ifndef TARGET_ABI32
1032 env->idt.limit = 511;
1034 env->idt.limit = 255;
1036 env->idt.base = target_mmap(0, sizeof(uint64_t) * (env->idt.limit + 1),
1037 PROT_READ|PROT_WRITE,
1038 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
1039 idt_table = g2h(env->idt.base);
1062 /* linux segment setup */
1064 uint64_t *gdt_table;
1065 env->gdt.base = target_mmap(0, sizeof(uint64_t) * TARGET_GDT_ENTRIES,
1066 PROT_READ|PROT_WRITE,
1067 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
1068 env->gdt.limit = sizeof(uint64_t) * TARGET_GDT_ENTRIES - 1;
1069 gdt_table = g2h(env->gdt.base);
1071 write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff,
1072 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1073 (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
1075 /* 64 bit code segment */
1076 write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff,
1077 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1079 (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
1081 write_dt(&gdt_table[__USER_DS >> 3], 0, 0xfffff,
1082 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1083 (3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT));
1086 cpu_x86_load_seg(env, R_CS, __USER_CS);
1087 cpu_x86_load_seg(env, R_SS, __USER_DS);
1089 cpu_x86_load_seg(env, R_DS, __USER_DS);
1090 cpu_x86_load_seg(env, R_ES, __USER_DS);
1091 cpu_x86_load_seg(env, R_FS, __USER_DS);
1092 cpu_x86_load_seg(env, R_GS, __USER_DS);
1093 /* This hack makes Wine work... */
1094 env->segs[R_FS].selector = 0;
1096 cpu_x86_load_seg(env, R_DS, 0);
1097 cpu_x86_load_seg(env, R_ES, 0);
1098 cpu_x86_load_seg(env, R_FS, 0);
1099 cpu_x86_load_seg(env, R_GS, 0);
1101 #elif defined(TARGET_SPARC)
1105 env->npc = regs->npc;
1107 for(i = 0; i < 8; i++)
1108 env->gregs[i] = regs->u_regs[i];
1109 for(i = 0; i < 8; i++)
1110 env->regwptr[i] = regs->u_regs[i + 8];
1113 #error unsupported target CPU
1117 gdbserver_start (gdbstub_port);
1118 gdb_handlesig(cpu, 0);