exec-all.h

   1 /*
   2  * internal execution defines for qemu
   3  *
   4  *  Copyright (c) 2003 Fabrice Bellard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library 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 GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 /* allow to see translation results - the slowdown should be negligible, so we leave it */
  22 #define DEBUG_DISAS
  23
  24 #ifndef glue
  25 #define xglue(x, y) x ## y
  26 #define glue(x, y) xglue(x, y)
  27 #define stringify(s)    tostring(s)
  28 #define tostring(s)     #s
  29 #endif
  30
  31 #if GCC_MAJOR < 3
  32 #define __builtin_expect(x, n) (x)
  33 #endif
  34
  35 #ifdef __i386__
  36 #define REGPARM(n) __attribute((regparm(n)))
  37 #else
  38 #define REGPARM(n)
  39 #endif
  40
  41 /* is_jmp field values */
  42 #define DISAS_NEXT    0 /* next instruction can be analyzed */
  43 #define DISAS_JUMP    1 /* only pc was modified dynamically */
  44 #define DISAS_UPDATE  2 /* cpu state was modified dynamically */
  45 #define DISAS_TB_JUMP 3 /* only pc was modified statically */
  46
  47 struct TranslationBlock;
  48
  49 /* XXX: make safe guess about sizes */
  50 #define MAX_OP_PER_INSTR 32
  51 #define OPC_BUF_SIZE 512
  52 #define OPC_MAX_SIZE (OPC_BUF_SIZE - MAX_OP_PER_INSTR)
  53
  54 #define OPPARAM_BUF_SIZE (OPC_BUF_SIZE * 3)
  55
  56 extern uint16_t gen_opc_buf[OPC_BUF_SIZE];
  57 extern uint32_t gen_opparam_buf[OPPARAM_BUF_SIZE];
  58 extern long gen_labels[OPC_BUF_SIZE];
  59 extern int nb_gen_labels;
  60 extern target_ulong gen_opc_pc[OPC_BUF_SIZE];
  61 extern target_ulong gen_opc_npc[OPC_BUF_SIZE];
  62 extern uint8_t gen_opc_cc_op[OPC_BUF_SIZE];
  63 extern uint8_t gen_opc_instr_start[OPC_BUF_SIZE];
  64 extern target_ulong gen_opc_jump_pc[2];
  65
  66 typedef void (GenOpFunc)(void);
  67 typedef void (GenOpFunc1)(long);
  68 typedef void (GenOpFunc2)(long, long);
  69 typedef void (GenOpFunc3)(long, long, long);
  70
  71 #if defined(TARGET_I386)
  72
  73 void optimize_flags_init(void);
  74
  75 #endif
  76
  77 extern FILE *logfile;
  78 extern int loglevel;
  79
  80 int gen_intermediate_code(CPUState *env, struct TranslationBlock *tb);
  81 int gen_intermediate_code_pc(CPUState *env, struct TranslationBlock *tb);
  82 void dump_ops(const uint16_t *opc_buf, const uint32_t *opparam_buf);
  83 int cpu_gen_code(CPUState *env, struct TranslationBlock *tb,
  84                  int max_code_size, int *gen_code_size_ptr);
  85 int cpu_restore_state(struct TranslationBlock *tb,
  86                       CPUState *env, unsigned long searched_pc,
  87                       void *puc);
  88 int cpu_gen_code_copy(CPUState *env, struct TranslationBlock *tb,
  89                       int max_code_size, int *gen_code_size_ptr);
  90 int cpu_restore_state_copy(struct TranslationBlock *tb,
  91                            CPUState *env, unsigned long searched_pc,
  92                            void *puc);
  93 void cpu_resume_from_signal(CPUState *env1, void *puc);
  94 void cpu_exec_init(void);
  95 int page_unprotect(unsigned long address, unsigned long pc, void *puc);
  96 void tb_invalidate_phys_page_range(target_ulong start, target_ulong end,
  97                                    int is_cpu_write_access);
  98 void tb_invalidate_page_range(target_ulong start, target_ulong end);
  99 void tlb_flush_page(CPUState *env, target_ulong addr);
 100 void tlb_flush(CPUState *env, int flush_global);
 101 int tlb_set_page(CPUState *env, target_ulong vaddr,
 102                  target_phys_addr_t paddr, int prot,
 103                  int is_user, int is_softmmu);
 104
 105 #define CODE_GEN_MAX_SIZE        65536
 106 #define CODE_GEN_ALIGN           16 /* must be >= of the size of a icache line */
 107
 108 #define CODE_GEN_HASH_BITS     15
 109 #define CODE_GEN_HASH_SIZE     (1 << CODE_GEN_HASH_BITS)
 110
 111 #define CODE_GEN_PHYS_HASH_BITS     15
 112 #define CODE_GEN_PHYS_HASH_SIZE     (1 << CODE_GEN_PHYS_HASH_BITS)
 113
 114 /* maximum total translate dcode allocated */
 115
 116 /* NOTE: the translated code area cannot be too big because on some
 117    archs the range of "fast" function calls is limited. Here is a
 118    summary of the ranges:
 119
 120    i386  : signed 32 bits
 121    arm   : signed 26 bits
 122    ppc   : signed 24 bits
 123    sparc : signed 32 bits
 124    alpha : signed 23 bits
 125 */
 126
 127 #if defined(__alpha__)
 128 #define CODE_GEN_BUFFER_SIZE     (2 * 1024 * 1024)
 129 #elif defined(__ia64)
 130 #define CODE_GEN_BUFFER_SIZE     (4 * 1024 * 1024)      /* range of addl */
 131 #elif defined(__powerpc__)
 132 #define CODE_GEN_BUFFER_SIZE     (6 * 1024 * 1024)
 133 #else
 134 #define CODE_GEN_BUFFER_SIZE     (8 * 1024 * 1024)
 135 #endif
 136
 137 //#define CODE_GEN_BUFFER_SIZE     (128 * 1024)
 138
 139 /* estimated block size for TB allocation */
 140 /* XXX: use a per code average code fragment size and modulate it
 141    according to the host CPU */
 142 #if defined(CONFIG_SOFTMMU)
 143 #define CODE_GEN_AVG_BLOCK_SIZE 128
 144 #else
 145 #define CODE_GEN_AVG_BLOCK_SIZE 64
 146 #endif
 147
 148 #define CODE_GEN_MAX_BLOCKS    (CODE_GEN_BUFFER_SIZE / CODE_GEN_AVG_BLOCK_SIZE)
 149
 150 #if defined(__powerpc__)
 151 #define USE_DIRECT_JUMP
 152 #endif
 153 #if defined(__i386__) && !defined(_WIN32)
 154 #define USE_DIRECT_JUMP
 155 #endif
 156
 157 typedef struct TranslationBlock {
 158     target_ulong pc;   /* simulated PC corresponding to this block (EIP + CS base) */
 159     target_ulong cs_base; /* CS base for this block */
 160     unsigned int flags; /* flags defining in which context the code was generated */
 161     uint16_t size;      /* size of target code for this block (1 <=
 162                            size <= TARGET_PAGE_SIZE) */
 163     uint16_t cflags;    /* compile flags */
 164 #define CF_CODE_COPY   0x0001 /* block was generated in code copy mode */
 165 #define CF_TB_FP_USED  0x0002 /* fp ops are used in the TB */
 166 #define CF_FP_USED     0x0004 /* fp ops are used in the TB or in a chained TB */
 167 #define CF_SINGLE_INSN 0x0008 /* compile only a single instruction */
 168
 169     uint8_t *tc_ptr;    /* pointer to the translated code */
 170     struct TranslationBlock *hash_next; /* next matching tb for virtual address */
 171     /* next matching tb for physical address. */
 172     struct TranslationBlock *phys_hash_next;
 173     /* first and second physical page containing code. The lower bit
 174        of the pointer tells the index in page_next[] */
 175     struct TranslationBlock *page_next[2];
 176     target_ulong page_addr[2];
 177
 178     /* the following data are used to directly call another TB from
 179        the code of this one. */
 180     uint16_t tb_next_offset[2]; /* offset of original jump target */
 181 #ifdef USE_DIRECT_JUMP
 182     uint16_t tb_jmp_offset[4]; /* offset of jump instruction */
 183 #else
 184     uint32_t tb_next[2]; /* address of jump generated code */
 185 #endif
 186     /* list of TBs jumping to this one. This is a circular list using
 187        the two least significant bits of the pointers to tell what is
 188        the next pointer: 0 = jmp_next[0], 1 = jmp_next[1], 2 =
 189        jmp_first */
 190     struct TranslationBlock *jmp_next[2];
 191     struct TranslationBlock *jmp_first;
 192 } TranslationBlock;
 193
 194 static inline unsigned int tb_hash_func(target_ulong pc)
 195 {
 196     return pc & (CODE_GEN_HASH_SIZE - 1);
 197 }
 198
 199 static inline unsigned int tb_phys_hash_func(unsigned long pc)
 200 {
 201     return pc & (CODE_GEN_PHYS_HASH_SIZE - 1);
 202 }
 203
 204 TranslationBlock *tb_alloc(target_ulong pc);
 205 void tb_flush(CPUState *env);
 206 void tb_link(TranslationBlock *tb);
 207 void tb_link_phys(TranslationBlock *tb,
 208                   target_ulong phys_pc, target_ulong phys_page2);
 209
 210 extern TranslationBlock *tb_hash[CODE_GEN_HASH_SIZE];
 211 extern TranslationBlock *tb_phys_hash[CODE_GEN_PHYS_HASH_SIZE];
 212
 213 extern uint8_t code_gen_buffer[CODE_GEN_BUFFER_SIZE];
 214 extern uint8_t *code_gen_ptr;
 215
 216 /* find a translation block in the translation cache. If not found,
 217    return NULL and the pointer to the last element of the list in pptb */
 218 static inline TranslationBlock *tb_find(TranslationBlock ***pptb,
 219                                         target_ulong pc,
 220                                         target_ulong cs_base,
 221                                         unsigned int flags)
 222 {
 223     TranslationBlock **ptb, *tb;
 224     unsigned int h;
 225
 226     h = tb_hash_func(pc);
 227     ptb = &tb_hash[h];
 228     for(;;) {
 229         tb = *ptb;
 230         if (!tb)
 231             break;
 232         if (tb->pc == pc && tb->cs_base == cs_base && tb->flags == flags)
 233             return tb;
 234         ptb = &tb->hash_next;
 235     }
 236     *pptb = ptb;
 237     return NULL;
 238 }
 239
 240
 241 #if defined(USE_DIRECT_JUMP)
 242
 243 #if defined(__powerpc__)
 244 static inline void tb_set_jmp_target1(unsigned long jmp_addr, unsigned long addr)
 245 {
 246     uint32_t val, *ptr;
 247
 248     /* patch the branch destination */
 249     ptr = (uint32_t *)jmp_addr;
 250     val = *ptr;
 251     val = (val & ~0x03fffffc) | ((addr - jmp_addr) & 0x03fffffc);
 252     *ptr = val;
 253     /* flush icache */
 254     asm volatile ("dcbst 0,%0" : : "r"(ptr) : "memory");
 255     asm volatile ("sync" : : : "memory");
 256     asm volatile ("icbi 0,%0" : : "r"(ptr) : "memory");
 257     asm volatile ("sync" : : : "memory");
 258     asm volatile ("isync" : : : "memory");
 259 }
 260 #elif defined(__i386__)
 261 static inline void tb_set_jmp_target1(unsigned long jmp_addr, unsigned long addr)
 262 {
 263     /* patch the branch destination */
 264     *(uint32_t *)jmp_addr = addr - (jmp_addr + 4);
 265     /* no need to flush icache explicitely */
 266 }
 267 #endif
 268
 269 static inline void tb_set_jmp_target(TranslationBlock *tb,
 270                                      int n, unsigned long addr)
 271 {
 272     unsigned long offset;
 273
 274     offset = tb->tb_jmp_offset[n];
 275     tb_set_jmp_target1((unsigned long)(tb->tc_ptr + offset), addr);
 276     offset = tb->tb_jmp_offset[n + 2];
 277     if (offset != 0xffff)
 278         tb_set_jmp_target1((unsigned long)(tb->tc_ptr + offset), addr);
 279 }
 280
 281 #else
 282
 283 /* set the jump target */
 284 static inline void tb_set_jmp_target(TranslationBlock *tb,
 285                                      int n, unsigned long addr)
 286 {
 287     tb->tb_next[n] = addr;
 288 }
 289
 290 #endif
 291
 292 static inline void tb_add_jump(TranslationBlock *tb, int n,
 293                                TranslationBlock *tb_next)
 294 {
 295     /* NOTE: this test is only needed for thread safety */
 296     if (!tb->jmp_next[n]) {
 297         /* patch the native jump address */
 298         tb_set_jmp_target(tb, n, (unsigned long)tb_next->tc_ptr);
 299
 300         /* add in TB jmp circular list */
 301         tb->jmp_next[n] = tb_next->jmp_first;
 302         tb_next->jmp_first = (TranslationBlock *)((long)(tb) | (n));
 303     }
 304 }
 305
 306 TranslationBlock *tb_find_pc(unsigned long pc_ptr);
 307
 308 #ifndef offsetof
 309 #define offsetof(type, field) ((size_t) &((type *)0)->field)
 310 #endif
 311
 312 #if defined(_WIN32)
 313 #define ASM_DATA_SECTION ".section \".data\"\n"
 314 #define ASM_PREVIOUS_SECTION ".section .text\n"
 315 #elif defined(__APPLE__)
 316 #define ASM_DATA_SECTION ".data\n"
 317 #define ASM_PREVIOUS_SECTION ".text\n"
 318 #else
 319 #define ASM_DATA_SECTION ".section \".data\"\n"
 320 #define ASM_PREVIOUS_SECTION ".previous\n"
 321 #endif
 322
 323 #if defined(__powerpc__)
 324
 325 /* we patch the jump instruction directly */
 326 #define GOTO_TB(opname, tbparam, n)\
 327 do {\
 328     asm volatile (ASM_DATA_SECTION\
 329                   ASM_NAME(__op_label) #n "." ASM_NAME(opname) ":\n"\
 330                   ".long 1f\n"\
 331                   ASM_PREVIOUS_SECTION \
 332                   "b " ASM_NAME(__op_jmp) #n "\n"\
 333                   "1:\n");\
 334 } while (0)
 335
 336 #elif defined(__i386__) && defined(USE_DIRECT_JUMP)
 337
 338 /* we patch the jump instruction directly */
 339 #define GOTO_TB(opname, tbparam, n)\
 340 do {\
 341     asm volatile (".section .data\n"\
 342                   ASM_NAME(__op_label) #n "." ASM_NAME(opname) ":\n"\
 343                   ".long 1f\n"\
 344                   ASM_PREVIOUS_SECTION \
 345                   "jmp " ASM_NAME(__op_jmp) #n "\n"\
 346                   "1:\n");\
 347 } while (0)
 348
 349 #else
 350
 351 /* jump to next block operations (more portable code, does not need
 352    cache flushing, but slower because of indirect jump) */
 353 #define GOTO_TB(opname, tbparam, n)\
 354 do {\
 355     static void __attribute__((unused)) *dummy ## n = &&dummy_label ## n;\
 356     static void __attribute__((unused)) *__op_label ## n = &&label ## n;\
 357     goto *(void *)(((TranslationBlock *)tbparam)->tb_next[n]);\
 358 label ## n: ;\
 359 dummy_label ## n: ;\
 360 } while (0)
 361
 362 #endif
 363
 364 /* XXX: will be suppressed */
 365 #define JUMP_TB(opname, tbparam, n, eip)\
 366 do {\
 367     GOTO_TB(opname, tbparam, n);\
 368     T0 = (long)(tbparam) + (n);\
 369     EIP = (int32_t)eip;\
 370     EXIT_TB();\
 371 } while (0)
 372
 373 extern CPUWriteMemoryFunc *io_mem_write[IO_MEM_NB_ENTRIES][4];
 374 extern CPUReadMemoryFunc *io_mem_read[IO_MEM_NB_ENTRIES][4];
 375 extern void *io_mem_opaque[IO_MEM_NB_ENTRIES];
 376
 377 #ifdef __powerpc__
 378 static inline int testandset (int *p)
 379 {
 380     int ret;
 381     __asm__ __volatile__ (
 382                           "0:    lwarx %0,0,%1\n"
 383                           "      xor. %0,%3,%0\n"
 384                           "      bne 1f\n"
 385                           "      stwcx. %2,0,%1\n"
 386                           "      bne- 0b\n"
 387                           "1:    "
 388                           : "=&r" (ret)
 389                           : "r" (p), "r" (1), "r" (0)
 390                           : "cr0", "memory");
 391     return ret;
 392 }
 393 #endif
 394
 395 #ifdef __i386__
 396 static inline int testandset (int *p)
 397 {
 398     long int readval = 0;
 399
 400     __asm__ __volatile__ ("lock; cmpxchgl %2, %0"
 401                           : "+m" (*p), "+a" (readval)
 402                           : "r" (1)
 403                           : "cc");
 404     return readval;
 405 }
 406 #endif
 407
 408 #ifdef __x86_64__
 409 static inline int testandset (int *p)
 410 {
 411     long int readval = 0;
 412
 413     __asm__ __volatile__ ("lock; cmpxchgl %2, %0"
 414                           : "+m" (*p), "+a" (readval)
 415                           : "r" (1)
 416                           : "cc");
 417     return readval;
 418 }
 419 #endif
 420
 421 #ifdef __s390__
 422 static inline int testandset (int *p)
 423 {
 424     int ret;
 425
 426     __asm__ __volatile__ ("0: cs    %0,%1,0(%2)\n"
 427                           "   jl    0b"
 428                           : "=&d" (ret)
 429                           : "r" (1), "a" (p), "0" (*p)
 430                           : "cc", "memory" );
 431     return ret;
 432 }
 433 #endif
 434
 435 #ifdef __alpha__
 436 static inline int testandset (int *p)
 437 {
 438     int ret;
 439     unsigned long one;
 440
 441     __asm__ __volatile__ ("0:   mov 1,%2\n"
 442                           "     ldl_l %0,%1\n"
 443                           "     stl_c %2,%1\n"
 444                           "     beq %2,1f\n"
 445                           ".subsection 2\n"
 446                           "1:   br 0b\n"
 447                           ".previous"
 448                           : "=r" (ret), "=m" (*p), "=r" (one)
 449                           : "m" (*p));
 450     return ret;
 451 }
 452 #endif
 453
 454 #ifdef __sparc__
 455 static inline int testandset (int *p)
 456 {
 457         int ret;
 458
 459         __asm__ __volatile__("ldstub    [%1], %0"
 460                              : "=r" (ret)
 461                              : "r" (p)
 462                              : "memory");
 463
 464         return (ret ? 1 : 0);
 465 }
 466 #endif
 467
 468 #ifdef __arm__
 469 static inline int testandset (int *spinlock)
 470 {
 471     register unsigned int ret;
 472     __asm__ __volatile__("swp %0, %1, [%2]"
 473                          : "=r"(ret)
 474                          : "0"(1), "r"(spinlock));
 475
 476     return ret;
 477 }
 478 #endif
 479
 480 #ifdef __mc68000
 481 static inline int testandset (int *p)
 482 {
 483     char ret;
 484     __asm__ __volatile__("tas %1; sne %0"
 485                          : "=r" (ret)
 486                          : "m" (p)
 487                          : "cc","memory");
 488     return ret;
 489 }
 490 #endif
 491
 492 #ifdef __ia64
 493 #include <ia64intrin.h>
 494
 495 static inline int testandset (int *p)
 496 {
 497     return __sync_lock_test_and_set (p, 1);
 498 }
 499 #endif
 500
 501 typedef int spinlock_t;
 502
 503 #define SPIN_LOCK_UNLOCKED 0
 504
 505 #if defined(CONFIG_USER_ONLY)
 506 static inline void spin_lock(spinlock_t *lock)
 507 {
 508     while (testandset(lock));
 509 }
 510
 511 static inline void spin_unlock(spinlock_t *lock)
 512 {
 513     *lock = 0;
 514 }
 515
 516 static inline int spin_trylock(spinlock_t *lock)
 517 {
 518     return !testandset(lock);
 519 }
 520 #else
 521 static inline void spin_lock(spinlock_t *lock)
 522 {
 523 }
 524
 525 static inline void spin_unlock(spinlock_t *lock)
 526 {
 527 }
 528
 529 static inline int spin_trylock(spinlock_t *lock)
 530 {
 531     return 1;
 532 }
 533 #endif
 534
 535 extern spinlock_t tb_lock;
 536
 537 extern int tb_invalidated_flag;
 538
 539 #if !defined(CONFIG_USER_ONLY)
 540
 541 void tlb_fill(target_ulong addr, int is_write, int is_user,
 542               void *retaddr);
 543
 544 #define ACCESS_TYPE 3
 545 #define MEMSUFFIX _code
 546 #define env cpu_single_env
 547
 548 #define DATA_SIZE 1
 549 #include "softmmu_header.h"
 550
 551 #define DATA_SIZE 2
 552 #include "softmmu_header.h"
 553
 554 #define DATA_SIZE 4
 555 #include "softmmu_header.h"
 556
 557 #define DATA_SIZE 8
 558 #include "softmmu_header.h"
 559
 560 #undef ACCESS_TYPE
 561 #undef MEMSUFFIX
 562 #undef env
 563
 564 #endif
 565
 566 #if defined(CONFIG_USER_ONLY)
 567 static inline target_ulong get_phys_addr_code(CPUState *env, target_ulong addr)
 568 {
 569     return addr;
 570 }
 571 #else
 572 /* NOTE: this function can trigger an exception */
 573 /* NOTE2: the returned address is not exactly the physical address: it
 574    is the offset relative to phys_ram_base */
 575 /* XXX: i386 target specific */
 576 static inline target_ulong get_phys_addr_code(CPUState *env, target_ulong addr)
 577 {
 578     int is_user, index, pd;
 579
 580     index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
 581 #if defined(TARGET_I386)
 582     is_user = ((env->hflags & HF_CPL_MASK) == 3);
 583 #elif defined (TARGET_PPC)
 584     is_user = msr_pr;
 585 #elif defined (TARGET_SPARC)
 586     is_user = (env->psrs == 0);
 587 #else
 588 #error "Unimplemented !"
 589 #endif
 590     if (__builtin_expect(env->tlb_read[is_user][index].address !=
 591                          (addr & TARGET_PAGE_MASK), 0)) {
 592         ldub_code(addr);
 593     }
 594     pd = env->tlb_read[is_user][index].address & ~TARGET_PAGE_MASK;
 595     if (pd > IO_MEM_ROM) {
 596         cpu_abort(env, "Trying to execute code outside RAM or ROM at 0x%08lx\n", addr);
 597     }
 598     return addr + env->tlb_read[is_user][index].addend - (unsigned long)phys_ram_base;
 599 }
 600 #endif
 601
 602
 603 #ifdef USE_KQEMU
 604 int kqemu_init(CPUState *env);
 605 int kqemu_cpu_exec(CPUState *env);
 606 void kqemu_flush_page(CPUState *env, target_ulong addr);
 607 void kqemu_flush(CPUState *env, int global);
 608
 609 static inline int kqemu_is_ok(CPUState *env)
 610 {
 611     return(env->kqemu_enabled &&
 612            (env->hflags & HF_CPL_MASK) == 3 &&
 613            (env->eflags & IOPL_MASK) != IOPL_MASK &&
 614            (env->cr[0] & CR0_PE_MASK) &&
 615            (env->eflags & IF_MASK) &&
 616            !(env->eflags & VM_MASK));
 617 }
 618
 619 #endif