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 __GNUC__ < 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 extern uint32_t gen_opc_hflags[OPC_BUF_SIZE];
  66
  67 typedef void (GenOpFunc)(void);
  68 typedef void (GenOpFunc1)(long);
  69 typedef void (GenOpFunc2)(long, long);
  70 typedef void (GenOpFunc3)(long, long, long);
  71
  72 #if defined(TARGET_I386)
  73
  74 void optimize_flags_init(void);
  75
  76 #endif
  77
  78 extern FILE *logfile;
  79 extern int loglevel;
  80
  81 int gen_intermediate_code(CPUState *env, struct TranslationBlock *tb);
  82 int gen_intermediate_code_pc(CPUState *env, struct TranslationBlock *tb);
  83 void dump_ops(const uint16_t *opc_buf, const uint32_t *opparam_buf);
  84 int cpu_gen_code(CPUState *env, struct TranslationBlock *tb,
  85                  int max_code_size, int *gen_code_size_ptr);
  86 int cpu_restore_state(struct TranslationBlock *tb,
  87                       CPUState *env, unsigned long searched_pc,
  88                       void *puc);
  89 int cpu_gen_code_copy(CPUState *env, struct TranslationBlock *tb,
  90                       int max_code_size, int *gen_code_size_ptr);
  91 int cpu_restore_state_copy(struct TranslationBlock *tb,
  92                            CPUState *env, unsigned long searched_pc,
  93                            void *puc);
  94 void cpu_resume_from_signal(CPUState *env1, void *puc);
  95 void cpu_exec_init(CPUState *env);
  96 int page_unprotect(target_ulong address, unsigned long pc, void *puc);
  97 void tb_invalidate_phys_page_range(target_ulong start, target_ulong end,
  98                                    int is_cpu_write_access);
  99 void tb_invalidate_page_range(target_ulong start, target_ulong end);
 100 void tlb_flush_page(CPUState *env, target_ulong addr);
 101 void tlb_flush(CPUState *env, int flush_global);
 102 int tlb_set_page_exec(CPUState *env, target_ulong vaddr,
 103                       target_phys_addr_t paddr, int prot,
 104                       int is_user, int is_softmmu);
 105 static inline int tlb_set_page(CPUState *env, target_ulong vaddr,
 106                                target_phys_addr_t paddr, int prot,
 107                                int is_user, int is_softmmu)
 108 {
 109     if (prot & PAGE_READ)
 110         prot |= PAGE_EXEC;
 111     return tlb_set_page_exec(env, vaddr, paddr, prot, is_user, is_softmmu);
 112 }
 113
 114 #define CODE_GEN_MAX_SIZE        65536
 115 #define CODE_GEN_ALIGN           16 /* must be >= of the size of a icache line */
 116
 117 #define CODE_GEN_PHYS_HASH_BITS     15
 118 #define CODE_GEN_PHYS_HASH_SIZE     (1 << CODE_GEN_PHYS_HASH_BITS)
 119
 120 /* maximum total translate dcode allocated */
 121
 122 /* NOTE: the translated code area cannot be too big because on some
 123    archs the range of "fast" function calls is limited. Here is a
 124    summary of the ranges:
 125
 126    i386  : signed 32 bits
 127    arm   : signed 26 bits
 128    ppc   : signed 24 bits
 129    sparc : signed 32 bits
 130    alpha : signed 23 bits
 131 */
 132
 133 #if defined(__alpha__)
 134 #define CODE_GEN_BUFFER_SIZE     (2 * 1024 * 1024)
 135 #elif defined(__ia64)
 136 #define CODE_GEN_BUFFER_SIZE     (4 * 1024 * 1024)      /* range of addl */
 137 #elif defined(__powerpc__)
 138 #define CODE_GEN_BUFFER_SIZE     (6 * 1024 * 1024)
 139 #else
 140 #define CODE_GEN_BUFFER_SIZE     (16 * 1024 * 1024)
 141 #endif
 142
 143 //#define CODE_GEN_BUFFER_SIZE     (128 * 1024)
 144
 145 /* estimated block size for TB allocation */
 146 /* XXX: use a per code average code fragment size and modulate it
 147    according to the host CPU */
 148 #if defined(CONFIG_SOFTMMU)
 149 #define CODE_GEN_AVG_BLOCK_SIZE 128
 150 #else
 151 #define CODE_GEN_AVG_BLOCK_SIZE 64
 152 #endif
 153
 154 #define CODE_GEN_MAX_BLOCKS    (CODE_GEN_BUFFER_SIZE / CODE_GEN_AVG_BLOCK_SIZE)
 155
 156 #if defined(__powerpc__)
 157 #define USE_DIRECT_JUMP
 158 #endif
 159 #if defined(__i386__) && !defined(_WIN32)
 160 #define USE_DIRECT_JUMP
 161 #endif
 162
 163 typedef struct TranslationBlock {
 164     target_ulong pc;   /* simulated PC corresponding to this block (EIP + CS base) */
 165     target_ulong cs_base; /* CS base for this block */
 166     unsigned int flags; /* flags defining in which context the code was generated */
 167     uint16_t size;      /* size of target code for this block (1 <=
 168                            size <= TARGET_PAGE_SIZE) */
 169     uint16_t cflags;    /* compile flags */
 170 #define CF_CODE_COPY   0x0001 /* block was generated in code copy mode */
 171 #define CF_TB_FP_USED  0x0002 /* fp ops are used in the TB */
 172 #define CF_FP_USED     0x0004 /* fp ops are used in the TB or in a chained TB */
 173 #define CF_SINGLE_INSN 0x0008 /* compile only a single instruction */
 174
 175     uint8_t *tc_ptr;    /* pointer to the translated code */
 176     /* next matching tb for physical address. */
 177     struct TranslationBlock *phys_hash_next;
 178     /* first and second physical page containing code. The lower bit
 179        of the pointer tells the index in page_next[] */
 180     struct TranslationBlock *page_next[2];
 181     target_ulong page_addr[2];
 182
 183     /* the following data are used to directly call another TB from
 184        the code of this one. */
 185     uint16_t tb_next_offset[2]; /* offset of original jump target */
 186 #ifdef USE_DIRECT_JUMP
 187     uint16_t tb_jmp_offset[4]; /* offset of jump instruction */
 188 #else
 189     uint32_t tb_next[2]; /* address of jump generated code */
 190 #endif
 191     /* list of TBs jumping to this one. This is a circular list using
 192        the two least significant bits of the pointers to tell what is
 193        the next pointer: 0 = jmp_next[0], 1 = jmp_next[1], 2 =
 194        jmp_first */
 195     struct TranslationBlock *jmp_next[2];
 196     struct TranslationBlock *jmp_first;
 197 } TranslationBlock;
 198
 199 static inline unsigned int tb_jmp_cache_hash_func(target_ulong pc)
 200 {
 201     return (pc ^ (pc >> TB_JMP_CACHE_BITS)) & (TB_JMP_CACHE_SIZE - 1);
 202 }
 203
 204 static inline unsigned int tb_phys_hash_func(unsigned long pc)
 205 {
 206     return pc & (CODE_GEN_PHYS_HASH_SIZE - 1);
 207 }
 208
 209 TranslationBlock *tb_alloc(target_ulong pc);
 210 void tb_flush(CPUState *env);
 211 void tb_link_phys(TranslationBlock *tb,
 212                   target_ulong phys_pc, target_ulong phys_page2);
 213
 214 extern TranslationBlock *tb_phys_hash[CODE_GEN_PHYS_HASH_SIZE];
 215
 216 extern uint8_t code_gen_buffer[CODE_GEN_BUFFER_SIZE];
 217 extern uint8_t *code_gen_ptr;
 218
 219 #if defined(USE_DIRECT_JUMP)
 220
 221 #if defined(__powerpc__)
 222 static inline void tb_set_jmp_target1(unsigned long jmp_addr, unsigned long addr)
 223 {
 224     uint32_t val, *ptr;
 225
 226     /* patch the branch destination */
 227     ptr = (uint32_t *)jmp_addr;
 228     val = *ptr;
 229     val = (val & ~0x03fffffc) | ((addr - jmp_addr) & 0x03fffffc);
 230     *ptr = val;
 231     /* flush icache */
 232     asm volatile ("dcbst 0,%0" : : "r"(ptr) : "memory");
 233     asm volatile ("sync" : : : "memory");
 234     asm volatile ("icbi 0,%0" : : "r"(ptr) : "memory");
 235     asm volatile ("sync" : : : "memory");
 236     asm volatile ("isync" : : : "memory");
 237 }
 238 #elif defined(__i386__)
 239 static inline void tb_set_jmp_target1(unsigned long jmp_addr, unsigned long addr)
 240 {
 241     /* patch the branch destination */
 242     *(uint32_t *)jmp_addr = addr - (jmp_addr + 4);
 243     /* no need to flush icache explicitely */
 244 }
 245 #endif
 246
 247 static inline void tb_set_jmp_target(TranslationBlock *tb,
 248                                      int n, unsigned long addr)
 249 {
 250     unsigned long offset;
 251
 252     offset = tb->tb_jmp_offset[n];
 253     tb_set_jmp_target1((unsigned long)(tb->tc_ptr + offset), addr);
 254     offset = tb->tb_jmp_offset[n + 2];
 255     if (offset != 0xffff)
 256         tb_set_jmp_target1((unsigned long)(tb->tc_ptr + offset), addr);
 257 }
 258
 259 #else
 260
 261 /* set the jump target */
 262 static inline void tb_set_jmp_target(TranslationBlock *tb,
 263                                      int n, unsigned long addr)
 264 {
 265     tb->tb_next[n] = addr;
 266 }
 267
 268 #endif
 269
 270 static inline void tb_add_jump(TranslationBlock *tb, int n,
 271                                TranslationBlock *tb_next)
 272 {
 273     /* NOTE: this test is only needed for thread safety */
 274     if (!tb->jmp_next[n]) {
 275         /* patch the native jump address */
 276         tb_set_jmp_target(tb, n, (unsigned long)tb_next->tc_ptr);
 277
 278         /* add in TB jmp circular list */
 279         tb->jmp_next[n] = tb_next->jmp_first;
 280         tb_next->jmp_first = (TranslationBlock *)((long)(tb) | (n));
 281     }
 282 }
 283
 284 TranslationBlock *tb_find_pc(unsigned long pc_ptr);
 285
 286 #ifndef offsetof
 287 #define offsetof(type, field) ((size_t) &((type *)0)->field)
 288 #endif
 289
 290 #if defined(_WIN32)
 291 #define ASM_DATA_SECTION ".section \".data\"\n"
 292 #define ASM_PREVIOUS_SECTION ".section .text\n"
 293 #elif defined(__APPLE__)
 294 #define ASM_DATA_SECTION ".data\n"
 295 #define ASM_PREVIOUS_SECTION ".text\n"
 296 #else
 297 #define ASM_DATA_SECTION ".section \".data\"\n"
 298 #define ASM_PREVIOUS_SECTION ".previous\n"
 299 #endif
 300
 301 #define ASM_OP_LABEL_NAME(n, opname) \
 302     ASM_NAME(__op_label) #n "." ASM_NAME(opname)
 303
 304 #if defined(__powerpc__)
 305
 306 /* we patch the jump instruction directly */
 307 #define GOTO_TB(opname, tbparam, n)\
 308 do {\
 309     asm volatile (ASM_DATA_SECTION\
 310                   ASM_OP_LABEL_NAME(n, opname) ":\n"\
 311                   ".long 1f\n"\
 312                   ASM_PREVIOUS_SECTION \
 313                   "b " ASM_NAME(__op_jmp) #n "\n"\
 314                   "1:\n");\
 315 } while (0)
 316
 317 #elif defined(__i386__) && defined(USE_DIRECT_JUMP)
 318
 319 /* we patch the jump instruction directly */
 320 #define GOTO_TB(opname, tbparam, n)\
 321 do {\
 322     asm volatile (".section .data\n"\
 323                   ASM_OP_LABEL_NAME(n, opname) ":\n"\
 324                   ".long 1f\n"\
 325                   ASM_PREVIOUS_SECTION \
 326                   "jmp " ASM_NAME(__op_jmp) #n "\n"\
 327                   "1:\n");\
 328 } while (0)
 329
 330 #else
 331
 332 /* jump to next block operations (more portable code, does not need
 333    cache flushing, but slower because of indirect jump) */
 334 #define GOTO_TB(opname, tbparam, n)\
 335 do {\
 336     static void __attribute__((unused)) *dummy ## n = &&dummy_label ## n;\
 337     static void __attribute__((unused)) *__op_label ## n \
 338         __asm__(ASM_OP_LABEL_NAME(n, opname)) = &&label ## n;\
 339     goto *(void *)(((TranslationBlock *)tbparam)->tb_next[n]);\
 340 label ## n: ;\
 341 dummy_label ## n: ;\
 342 } while (0)
 343
 344 #endif
 345
 346 extern CPUWriteMemoryFunc *io_mem_write[IO_MEM_NB_ENTRIES][4];
 347 extern CPUReadMemoryFunc *io_mem_read[IO_MEM_NB_ENTRIES][4];
 348 extern void *io_mem_opaque[IO_MEM_NB_ENTRIES];
 349
 350 #ifdef __powerpc__
 351 static inline int testandset (int *p)
 352 {
 353     int ret;
 354     __asm__ __volatile__ (
 355                           "0:    lwarx %0,0,%1\n"
 356                           "      xor. %0,%3,%0\n"
 357                           "      bne 1f\n"
 358                           "      stwcx. %2,0,%1\n"
 359                           "      bne- 0b\n"
 360                           "1:    "
 361                           : "=&r" (ret)
 362                           : "r" (p), "r" (1), "r" (0)
 363                           : "cr0", "memory");
 364     return ret;
 365 }
 366 #endif
 367
 368 #ifdef __i386__
 369 static inline int testandset (int *p)
 370 {
 371     long int readval = 0;
 372
 373     __asm__ __volatile__ ("lock; cmpxchgl %2, %0"
 374                           : "+m" (*p), "+a" (readval)
 375                           : "r" (1)
 376                           : "cc");
 377     return readval;
 378 }
 379 #endif
 380
 381 #ifdef __x86_64__
 382 static inline int testandset (int *p)
 383 {
 384     long int readval = 0;
 385
 386     __asm__ __volatile__ ("lock; cmpxchgl %2, %0"
 387                           : "+m" (*p), "+a" (readval)
 388                           : "r" (1)
 389                           : "cc");
 390     return readval;
 391 }
 392 #endif
 393
 394 #ifdef __s390__
 395 static inline int testandset (int *p)
 396 {
 397     int ret;
 398
 399     __asm__ __volatile__ ("0: cs    %0,%1,0(%2)\n"
 400                           "   jl    0b"
 401                           : "=&d" (ret)
 402                           : "r" (1), "a" (p), "0" (*p)
 403                           : "cc", "memory" );
 404     return ret;
 405 }
 406 #endif
 407
 408 #ifdef __alpha__
 409 static inline int testandset (int *p)
 410 {
 411     int ret;
 412     unsigned long one;
 413
 414     __asm__ __volatile__ ("0:   mov 1,%2\n"
 415                           "     ldl_l %0,%1\n"
 416                           "     stl_c %2,%1\n"
 417                           "     beq %2,1f\n"
 418                           ".subsection 2\n"
 419                           "1:   br 0b\n"
 420                           ".previous"
 421                           : "=r" (ret), "=m" (*p), "=r" (one)
 422                           : "m" (*p));
 423     return ret;
 424 }
 425 #endif
 426
 427 #ifdef __sparc__
 428 static inline int testandset (int *p)
 429 {
 430         int ret;
 431
 432         __asm__ __volatile__("ldstub    [%1], %0"
 433                              : "=r" (ret)
 434                              : "r" (p)
 435                              : "memory");
 436
 437         return (ret ? 1 : 0);
 438 }
 439 #endif
 440
 441 #ifdef __arm__
 442 static inline int testandset (int *spinlock)
 443 {
 444     register unsigned int ret;
 445     __asm__ __volatile__("swp %0, %1, [%2]"
 446                          : "=r"(ret)
 447                          : "0"(1), "r"(spinlock));
 448
 449     return ret;
 450 }
 451 #endif
 452
 453 #ifdef __mc68000
 454 static inline int testandset (int *p)
 455 {
 456     char ret;
 457     __asm__ __volatile__("tas %1; sne %0"
 458                          : "=r" (ret)
 459                          : "m" (p)
 460                          : "cc","memory");
 461     return ret;
 462 }
 463 #endif
 464
 465 #ifdef __ia64
 466 #include <ia64intrin.h>
 467
 468 static inline int testandset (int *p)
 469 {
 470     return __sync_lock_test_and_set (p, 1);
 471 }
 472 #endif
 473
 474 typedef int spinlock_t;
 475
 476 #define SPIN_LOCK_UNLOCKED 0
 477
 478 #if defined(CONFIG_USER_ONLY)
 479 static inline void spin_lock(spinlock_t *lock)
 480 {
 481     while (testandset(lock));
 482 }
 483
 484 static inline void spin_unlock(spinlock_t *lock)
 485 {
 486     *lock = 0;
 487 }
 488
 489 static inline int spin_trylock(spinlock_t *lock)
 490 {
 491     return !testandset(lock);
 492 }
 493 #else
 494 static inline void spin_lock(spinlock_t *lock)
 495 {
 496 }
 497
 498 static inline void spin_unlock(spinlock_t *lock)
 499 {
 500 }
 501
 502 static inline int spin_trylock(spinlock_t *lock)
 503 {
 504     return 1;
 505 }
 506 #endif
 507
 508 extern spinlock_t tb_lock;
 509
 510 extern int tb_invalidated_flag;
 511
 512 #if !defined(CONFIG_USER_ONLY)
 513
 514 void tlb_fill(target_ulong addr, int is_write, int is_user,
 515               void *retaddr);
 516
 517 #define ACCESS_TYPE 3
 518 #define MEMSUFFIX _code
 519 #define env cpu_single_env
 520
 521 #define DATA_SIZE 1
 522 #include "softmmu_header.h"
 523
 524 #define DATA_SIZE 2
 525 #include "softmmu_header.h"
 526
 527 #define DATA_SIZE 4
 528 #include "softmmu_header.h"
 529
 530 #define DATA_SIZE 8
 531 #include "softmmu_header.h"
 532
 533 #undef ACCESS_TYPE
 534 #undef MEMSUFFIX
 535 #undef env
 536
 537 #endif
 538
 539 #if defined(CONFIG_USER_ONLY)
 540 static inline target_ulong get_phys_addr_code(CPUState *env, target_ulong addr)
 541 {
 542     return addr;
 543 }
 544 #else
 545 /* NOTE: this function can trigger an exception */
 546 /* NOTE2: the returned address is not exactly the physical address: it
 547    is the offset relative to phys_ram_base */
 548 static inline target_ulong get_phys_addr_code(CPUState *env, target_ulong addr)
 549 {
 550     int is_user, index, pd;
 551
 552     index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
 553 #if defined(TARGET_I386)
 554     is_user = ((env->hflags & HF_CPL_MASK) == 3);
 555 #elif defined (TARGET_PPC)
 556     is_user = msr_pr;
 557 #elif defined (TARGET_MIPS)
 558     is_user = ((env->hflags & MIPS_HFLAG_MODE) == MIPS_HFLAG_UM);
 559 #elif defined (TARGET_SPARC)
 560     is_user = (env->psrs == 0);
 561 #elif defined (TARGET_ARM)
 562     is_user = ((env->uncached_cpsr & CPSR_M) == ARM_CPU_MODE_USR);
 563 #elif defined (TARGET_SH4)
 564     is_user = ((env->sr & SR_MD) == 0);
 565 #else
 566 #error unimplemented CPU
 567 #endif
 568     if (__builtin_expect(env->tlb_table[is_user][index].addr_code !=
 569                          (addr & TARGET_PAGE_MASK), 0)) {
 570         ldub_code(addr);
 571     }
 572     pd = env->tlb_table[is_user][index].addr_code & ~TARGET_PAGE_MASK;
 573     if (pd > IO_MEM_ROM) {
 574         cpu_abort(env, "Trying to execute code outside RAM or ROM at 0x%08lx\n", addr);
 575     }
 576     return addr + env->tlb_table[is_user][index].addend - (unsigned long)phys_ram_base;
 577 }
 578 #endif
 579
 580
 581 #ifdef USE_KQEMU
 582 #define KQEMU_MODIFY_PAGE_MASK (0xff & ~(VGA_DIRTY_FLAG | CODE_DIRTY_FLAG))
 583
 584 int kqemu_init(CPUState *env);
 585 int kqemu_cpu_exec(CPUState *env);
 586 void kqemu_flush_page(CPUState *env, target_ulong addr);
 587 void kqemu_flush(CPUState *env, int global);
 588 void kqemu_set_notdirty(CPUState *env, ram_addr_t ram_addr);
 589 void kqemu_modify_page(CPUState *env, ram_addr_t ram_addr);
 590 void kqemu_cpu_interrupt(CPUState *env);
 591 void kqemu_record_dump(void);
 592
 593 static inline int kqemu_is_ok(CPUState *env)
 594 {
 595     return(env->kqemu_enabled &&
 596            (env->cr[0] & CR0_PE_MASK) &&
 597            !(env->hflags & HF_INHIBIT_IRQ_MASK) &&
 598            (env->eflags & IF_MASK) &&
 599            !(env->eflags & VM_MASK) &&
 600            (env->kqemu_enabled == 2 ||
 601             ((env->hflags & HF_CPL_MASK) == 3 &&
 602              (env->eflags & IOPL_MASK) != IOPL_MASK)));
 603 }
 604
 605 #endif