mono/mini/mini-amd64.h

   1 /**
   2  * \file
   3  */
   4
   5 #ifndef __MONO_MINI_AMD64_H__
   6 #define __MONO_MINI_AMD64_H__
   7
   8 #include <mono/arch/amd64/amd64-codegen.h>
   9 #include <mono/utils/mono-sigcontext.h>
  10 #include <mono/utils/mono-context.h>
  11 #include <glib.h>
  12
  13 #ifdef HOST_WIN32
  14 #include <windows.h>
  15 /* use SIG* defines if possible */
  16 #ifdef HAVE_SIGNAL_H
  17 #include <signal.h>
  18 #endif
  19
  20 #if !defined(_MSC_VER)
  21 /* sigcontext surrogate */
  22 struct sigcontext {
  23         guint64 eax;
  24         guint64 ebx;
  25         guint64 ecx;
  26         guint64 edx;
  27         guint64 ebp;
  28         guint64 esp;
  29     guint64 esi;
  30         guint64 edi;
  31         guint64 eip;
  32 };
  33 #endif
  34
  35 typedef void (* MonoW32ExceptionHandler) (int _dummy, EXCEPTION_POINTERS *info, void *context);
  36 void win32_seh_init(void);
  37 void win32_seh_cleanup(void);
  38 void win32_seh_set_handler(int type, MonoW32ExceptionHandler handler);
  39
  40 #ifndef SIGFPE
  41 #define SIGFPE 4
  42 #endif
  43
  44 #ifndef SIGILL
  45 #define SIGILL 8
  46 #endif
  47
  48 #ifndef SIGSEGV
  49 #define SIGSEGV 11
  50 #endif
  51
  52 LONG CALLBACK seh_handler(EXCEPTION_POINTERS* ep);
  53
  54 typedef struct {
  55         SRWLOCK lock;
  56         PVOID handle;
  57         gsize begin_range;
  58         gsize end_range;
  59         PRUNTIME_FUNCTION rt_funcs;
  60         DWORD rt_funcs_current_count;
  61         DWORD rt_funcs_max_count;
  62 } DynamicFunctionTableEntry;
  63
  64 #define MONO_UNWIND_INFO_RT_FUNC_SIZE 128
  65
  66 // On Win8/Win2012Server and later we can use dynamic growable function tables
  67 // instead of RtlInstallFunctionTableCallback. This gives us the benefit to
  68 // include all needed unwind upon registration.
  69 typedef DWORD (NTAPI* RtlAddGrowableFunctionTablePtr)(
  70     PVOID * DynamicTable,
  71     PRUNTIME_FUNCTION FunctionTable,
  72     DWORD EntryCount,
  73     DWORD MaximumEntryCount,
  74     ULONG_PTR RangeBase,
  75     ULONG_PTR RangeEnd);
  76
  77 typedef VOID (NTAPI* RtlGrowFunctionTablePtr)(
  78     PVOID DynamicTable,
  79     DWORD NewEntryCount);
  80
  81 typedef VOID (NTAPI* RtlDeleteGrowableFunctionTablePtr)(
  82     PVOID DynamicTable);
  83
  84 #endif /* HOST_WIN32 */
  85
  86 #ifdef sun    // Solaris x86
  87 #  undef SIGSEGV_ON_ALTSTACK
  88 #  define MONO_ARCH_NOMAP32BIT
  89
  90 struct sigcontext {
  91         unsigned short gs, __gsh;
  92         unsigned short fs, __fsh;
  93         unsigned short es, __esh;
  94         unsigned short ds, __dsh;
  95         unsigned long edi;
  96         unsigned long esi;
  97         unsigned long ebp;
  98         unsigned long esp;
  99         unsigned long ebx;
 100         unsigned long edx;
 101         unsigned long ecx;
 102         unsigned long eax;
 103         unsigned long trapno;
 104         unsigned long err;
 105         unsigned long eip;
 106         unsigned short cs, __csh;
 107         unsigned long eflags;
 108         unsigned long esp_at_signal;
 109         unsigned short ss, __ssh;
 110         unsigned long fpstate[95];
 111       unsigned long filler[5];
 112 };
 113 #endif  // sun, Solaris x86
 114
 115 #ifndef DISABLE_SIMD
 116 #define MONO_ARCH_SIMD_INTRINSICS 1
 117 #define MONO_ARCH_NEED_SIMD_BANK 1
 118 #define MONO_ARCH_USE_SHARED_FP_SIMD_BANK 1
 119 #endif
 120
 121
 122
 123 #if defined(__APPLE__)
 124 #define MONO_ARCH_SIGNAL_STACK_SIZE MINSIGSTKSZ
 125 #else
 126 #define MONO_ARCH_SIGNAL_STACK_SIZE (16 * 1024)
 127 #endif
 128
 129 #define MONO_ARCH_HAVE_RESTORE_STACK_SUPPORT 1
 130
 131 #define MONO_ARCH_CPU_SPEC mono_amd64_desc
 132
 133 #define MONO_MAX_IREGS 16
 134
 135 #define MONO_MAX_FREGS AMD64_XMM_NREG
 136
 137 #define MONO_ARCH_FP_RETURN_REG AMD64_XMM0
 138
 139 #ifdef TARGET_WIN32
 140 /* xmm5 is used as a scratch register */
 141 #define MONO_ARCH_CALLEE_FREGS 0x1f
 142 /* xmm6:xmm15 */
 143 #define MONO_ARCH_CALLEE_SAVED_FREGS (0xffff - 0x3f)
 144 #define MONO_ARCH_FP_SCRATCH_REG AMD64_XMM5
 145 #else
 146 /* xmm15 is used as a scratch register */
 147 #define MONO_ARCH_CALLEE_FREGS 0x7fff
 148 #define MONO_ARCH_CALLEE_SAVED_FREGS 0
 149 #define MONO_ARCH_FP_SCRATCH_REG AMD64_XMM15
 150 #endif
 151
 152 #define MONO_MAX_XREGS MONO_MAX_FREGS
 153
 154 #define MONO_ARCH_CALLEE_XREGS MONO_ARCH_CALLEE_FREGS
 155 #define MONO_ARCH_CALLEE_SAVED_XREGS MONO_ARCH_CALLEE_SAVED_FREGS
 156
 157
 158 #define MONO_ARCH_CALLEE_REGS AMD64_CALLEE_REGS
 159 #define MONO_ARCH_CALLEE_SAVED_REGS AMD64_CALLEE_SAVED_REGS
 160
 161 #define MONO_ARCH_USE_FPSTACK FALSE
 162 #define MONO_ARCH_FPSTACK_SIZE 0
 163
 164 #define MONO_ARCH_INST_FIXED_REG(desc) ((desc == '\0') ? -1 : ((desc == 'i' ? -1 : ((desc == 'a') ? AMD64_RAX : ((desc == 's') ? AMD64_RCX : ((desc == 'd') ? AMD64_RDX : ((desc == 'A') ? MONO_AMD64_ARG_REG1 : -1)))))))
 165
 166 /* RDX is clobbered by the opcode implementation before accessing sreg2 */
 167 #define MONO_ARCH_INST_SREG2_MASK(ins) (((ins [MONO_INST_CLOB] == 'a') || (ins [MONO_INST_CLOB] == 'd')) ? (1 << AMD64_RDX) : 0)
 168
 169 #define MONO_ARCH_INST_IS_REGPAIR(desc) FALSE
 170 #define MONO_ARCH_INST_REGPAIR_REG2(desc,hreg1) (-1)
 171
 172 #define MONO_ARCH_FRAME_ALIGNMENT 16
 173
 174 /* fixme: align to 16byte instead of 32byte (we align to 32byte to get
 175  * reproduceable results for benchmarks */
 176 #define MONO_ARCH_CODE_ALIGNMENT 32
 177
 178 struct MonoLMF {
 179         /*
 180          * If the lowest bit is set, then this LMF has the rip field set. Otherwise,
 181          * the rip field is not set, and the rsp field points to the stack location where
 182          * the caller ip is saved.
 183          * If the second lowest bit is set, then this is a MonoLMFExt structure, and
 184          * the other fields are not valid.
 185          * If the third lowest bit is set, then this is a MonoLMFTramp structure, and
 186          * the 'rbp' field is not valid.
 187          */
 188         gpointer    previous_lmf;
 189         guint64     rip;
 190         guint64     rbp;
 191         guint64     rsp;
 192 };
 193
 194 /* LMF structure used by the JIT trampolines */
 195 typedef struct {
 196         struct MonoLMF lmf;
 197         MonoContext *ctx;
 198         gpointer lmf_addr;
 199 } MonoLMFTramp;
 200
 201 typedef struct MonoCompileArch {
 202         gint32 localloc_offset;
 203         gint32 reg_save_area_offset;
 204         gint32 stack_alloc_size;
 205         gint32 sp_fp_offset;
 206         guint32 saved_iregs;
 207         gboolean omit_fp, omit_fp_computed;
 208         gpointer cinfo;
 209         gint32 async_point_count;
 210         gpointer vret_addr_loc;
 211 #ifdef HOST_WIN32
 212         gpointer unwindinfo;
 213 #endif
 214         gpointer seq_point_info_var;
 215         gpointer ss_trigger_page_var;
 216         gpointer ss_tramp_var;
 217         gpointer bp_tramp_var;
 218         gpointer lmf_var;
 219 } MonoCompileArch;
 220
 221 #ifdef TARGET_WIN32
 222
 223 static AMD64_Reg_No param_regs [] = { AMD64_RCX, AMD64_RDX, AMD64_R8, AMD64_R9 };
 224
 225 static AMD64_XMM_Reg_No float_param_regs [] = { AMD64_XMM0, AMD64_XMM1, AMD64_XMM2, AMD64_XMM3 };
 226
 227 static AMD64_Reg_No return_regs [] = { AMD64_RAX };
 228
 229 static AMD64_XMM_Reg_No float_return_regs [] = { AMD64_XMM0 };
 230
 231 #define PARAM_REGS G_N_ELEMENTS(param_regs)
 232 #define FLOAT_PARAM_REGS G_N_ELEMENTS(float_param_regs)
 233 #define RETURN_REGS G_N_ELEMENTS(return_regs)
 234 #define FLOAT_RETURN_REGS G_N_ELEMENTS(float_return_regs)
 235
 236 #else
 237 #define PARAM_REGS 6
 238 #define FLOAT_PARAM_REGS 8
 239
 240 static const AMD64_Reg_No param_regs [] = {AMD64_RDI, AMD64_RSI, AMD64_RDX,
 241                                            AMD64_RCX, AMD64_R8,  AMD64_R9};
 242
 243 static const AMD64_Reg_No return_regs [] = {AMD64_RAX, AMD64_RDX};
 244 #endif
 245
 246 typedef struct {
 247         /* Method address to call */
 248         gpointer addr;
 249         /* The trampoline reads this, so keep the size explicit */
 250         int ret_marshal;
 251         /* If ret_marshal != NONE, this is the reg of the vret arg, else -1 (used in out case) */
 252         /* Equivalent of vret_arg_slot in the x86 implementation. */
 253         int vret_arg_reg;
 254         /* The stack slot where the return value will be stored (used in in case) */
 255         int vret_slot;
 256         int stack_usage, map_count;
 257         /* If not -1, then make a virtual call using this vtable offset */
 258         int vcall_offset;
 259         /* If 1, make an indirect call to the address in the rgctx reg */
 260         int calli;
 261         /* Whenever this is a in or an out call */
 262         int gsharedvt_in;
 263         /* Maps stack slots/registers in the caller to the stack slots/registers in the callee */
 264         int map [MONO_ZERO_LEN_ARRAY];
 265 } GSharedVtCallInfo;
 266
 267 /* Structure used by the sequence points in AOTed code */
 268 typedef struct {
 269         gpointer ss_tramp_addr;
 270         gpointer bp_addrs [MONO_ZERO_LEN_ARRAY];
 271 } SeqPointInfo;
 272
 273 typedef struct {
 274         mgreg_t res;
 275         guint8 *ret;
 276         double fregs [8];
 277         mgreg_t has_fp;
 278         mgreg_t nstack_args;
 279         guint8 buffer [256];
 280         /* This should come last as the structure is dynamically extended */
 281         mgreg_t regs [PARAM_REGS];
 282 } DynCallArgs;
 283
 284 typedef enum {
 285         ArgInIReg,
 286         ArgInFloatSSEReg,
 287         ArgInDoubleSSEReg,
 288         ArgOnStack,
 289         ArgValuetypeInReg,
 290         ArgValuetypeAddrInIReg,
 291         ArgValuetypeAddrOnStack,
 292         /* gsharedvt argument passed by addr */
 293         ArgGSharedVtInReg,
 294         ArgGSharedVtOnStack,
 295         /* Variable sized gsharedvt argument passed/returned by addr */
 296         ArgGsharedvtVariableInReg,
 297         ArgNone /* only in pair_storage */
 298 } ArgStorage;
 299
 300 typedef struct {
 301         gint16 offset;
 302         gint8  reg;
 303         ArgStorage storage : 8;
 304
 305         /* Only if storage == ArgValuetypeInReg */
 306         ArgStorage pair_storage [2];
 307         gint8 pair_regs [2];
 308         /* The size of each pair (bytes) */
 309         int pair_size [2];
 310         int nregs;
 311         /* Only if storage == ArgOnStack */
 312         int arg_size; // Bytes, will always be rounded up/aligned to 8 byte boundary
 313         // Size in bytes for small arguments
 314         int byte_arg_size;
 315         guint8 pass_empty_struct : 1; // Set in scenarios when empty structs needs to be represented as argument.
 316 } ArgInfo;
 317
 318 typedef struct {
 319         int nargs;
 320         guint32 stack_usage;
 321         guint32 reg_usage;
 322         guint32 freg_usage;
 323         gboolean need_stack_align;
 324         gboolean gsharedvt;
 325         /* The index of the vret arg in the argument list */
 326         int vret_arg_index;
 327         ArgInfo ret;
 328         ArgInfo sig_cookie;
 329         ArgInfo args [1];
 330 } CallInfo;
 331
 332
 333 #define MONO_CONTEXT_SET_LLVM_EXC_REG(ctx, exc) do { (ctx)->gregs [AMD64_RAX] = (gsize)exc; } while (0)
 334 #define MONO_CONTEXT_SET_LLVM_EH_SELECTOR_REG(ctx, sel) do { (ctx)->gregs [AMD64_RDX] = (gsize)(sel); } while (0)
 335
 336 #define MONO_ARCH_INIT_TOP_LMF_ENTRY(lmf)
 337
 338 #ifdef _MSC_VER
 339
 340 #define MONO_INIT_CONTEXT_FROM_FUNC(ctx, start_func) do { \
 341     guint64 stackptr; \
 342         mono_arch_flush_register_windows (); \
 343         stackptr = ((guint64)_AddressOfReturnAddress () - sizeof (void*));\
 344         MONO_CONTEXT_SET_IP ((ctx), (start_func)); \
 345         MONO_CONTEXT_SET_BP ((ctx), stackptr); \
 346         MONO_CONTEXT_SET_SP ((ctx), stackptr); \
 347 } while (0)
 348
 349 #else
 350
 351 /*
 352  * __builtin_frame_address () is broken on some older gcc versions in the presence of
 353  * frame pointer elimination, see bug #82095.
 354  */
 355 #define MONO_INIT_CONTEXT_FROM_FUNC(ctx,start_func) do {        \
 356         int tmp; \
 357         guint64 stackptr = (guint64)&tmp; \
 358                 mono_arch_flush_register_windows ();    \
 359                 MONO_CONTEXT_SET_IP ((ctx), (start_func));      \
 360                 MONO_CONTEXT_SET_BP ((ctx), stackptr);  \
 361                 MONO_CONTEXT_SET_SP ((ctx), stackptr);  \
 362         } while (0)
 363
 364 #endif
 365
 366 /*
 367  * some icalls like mono_array_new_va needs to be called using a different
 368  * calling convention.
 369  */
 370 #define MONO_ARCH_VARARG_ICALLS 1
 371
 372 #if !defined( HOST_WIN32 ) && defined (HAVE_SIGACTION)
 373
 374 #define MONO_ARCH_USE_SIGACTION 1
 375
 376 #ifdef HAVE_WORKING_SIGALTSTACK
 377
 378 #define MONO_ARCH_SIGSEGV_ON_ALTSTACK
 379
 380 #endif
 381
 382 #endif /* !HOST_WIN32 */
 383
 384 #if !defined(__linux__)
 385 #define MONO_ARCH_NOMAP32BIT 1
 386 #endif
 387
 388 #ifdef TARGET_WIN32
 389 #define MONO_AMD64_ARG_REG1 AMD64_RCX
 390 #define MONO_AMD64_ARG_REG2 AMD64_RDX
 391 #define MONO_AMD64_ARG_REG3 AMD64_R8
 392 #define MONO_AMD64_ARG_REG4 AMD64_R9
 393 #else
 394 #define MONO_AMD64_ARG_REG1 AMD64_RDI
 395 #define MONO_AMD64_ARG_REG2 AMD64_RSI
 396 #define MONO_AMD64_ARG_REG3 AMD64_RDX
 397 #define MONO_AMD64_ARG_REG4 AMD64_RCX
 398 #endif
 399
 400 #define MONO_ARCH_NO_EMULATE_LONG_SHIFT_OPS
 401 #define MONO_ARCH_NO_EMULATE_LONG_MUL_OPTS
 402
 403 #define MONO_ARCH_EMULATE_CONV_R8_UN    1
 404 #define MONO_ARCH_EMULATE_FREM 1
 405 #define MONO_ARCH_HAVE_IS_INT_OVERFLOW 1
 406 #define MONO_ARCH_HAVE_INVALIDATE_METHOD 1
 407 #define MONO_ARCH_HAVE_FULL_AOT_TRAMPOLINES 1
 408 #define MONO_ARCH_IMT_REG AMD64_R10
 409 #define MONO_ARCH_IMT_SCRATCH_REG AMD64_R11
 410 #define MONO_ARCH_VTABLE_REG MONO_AMD64_ARG_REG1
 411 /*
 412  * We use r10 for the imt/rgctx register rather than r11 because r11 is
 413  * used by the trampoline as a scratch register and hence might be
 414  * clobbered across method call boundaries.
 415  */
 416 #define MONO_ARCH_RGCTX_REG MONO_ARCH_IMT_REG
 417 #define MONO_ARCH_EXC_REG AMD64_RAX
 418 #define MONO_ARCH_HAVE_CMOV_OPS 1
 419 #define MONO_ARCH_HAVE_EXCEPTIONS_INIT 1
 420 #define MONO_ARCH_HAVE_GENERALIZED_IMT_TRAMPOLINE 1
 421 #define MONO_ARCH_HAVE_LIVERANGE_OPS 1
 422 #define MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX 1
 423 #define MONO_ARCH_HAVE_GET_TRAMPOLINES 1
 424
 425 #define MONO_ARCH_AOT_SUPPORTED 1
 426 #define MONO_ARCH_SOFT_DEBUG_SUPPORTED 1
 427
 428 #define MONO_ARCH_SUPPORT_TASKLETS 1
 429
 430 #define MONO_ARCH_GSHARED_SUPPORTED 1
 431 #define MONO_ARCH_DYN_CALL_SUPPORTED 1
 432 #define MONO_ARCH_DYN_CALL_PARAM_AREA 0
 433
 434 #define MONO_ARCH_LLVM_SUPPORTED 1
 435 #define MONO_ARCH_HAVE_CARD_TABLE_WBARRIER 1
 436 #define MONO_ARCH_HAVE_SETUP_RESUME_FROM_SIGNAL_HANDLER_CTX 1
 437 #define MONO_ARCH_GC_MAPS_SUPPORTED 1
 438 #define MONO_ARCH_HAVE_CONTEXT_SET_INT_REG 1
 439 #define MONO_ARCH_HAVE_SETUP_ASYNC_CALLBACK 1
 440 #define MONO_ARCH_HAVE_CREATE_LLVM_NATIVE_THUNK 1
 441 #define MONO_ARCH_HAVE_OP_TAIL_CALL 1
 442 #define MONO_ARCH_HAVE_TRANSLATE_TLS_OFFSET 1
 443 #define MONO_ARCH_HAVE_DUMMY_INIT 1
 444 #define MONO_ARCH_HAVE_SDB_TRAMPOLINES 1
 445 #define MONO_ARCH_HAVE_PATCH_CODE_NEW 1
 446 #define MONO_ARCH_HAVE_OP_GENERIC_CLASS_INIT 1
 447 #define MONO_ARCH_HAVE_GENERAL_RGCTX_LAZY_FETCH_TRAMPOLINE 1
 448 #define MONO_ARCH_HAVE_INIT_LMF_EXT 1
 449
 450 #if defined(TARGET_OSX) || defined(__linux__)
 451 #define MONO_ARCH_HAVE_UNWIND_BACKTRACE 1
 452 #endif
 453
 454 #define MONO_ARCH_GSHAREDVT_SUPPORTED 1
 455
 456
 457 #if defined(TARGET_APPLETVOS)
 458 /* No signals */
 459 #define MONO_ARCH_NEED_DIV_CHECK 1
 460 #endif
 461
 462 /* Used for optimization, not complete */
 463 #define MONO_ARCH_IS_OP_MEMBASE(opcode) ((opcode) == OP_X86_PUSH_MEMBASE)
 464
 465 #define MONO_ARCH_EMIT_BOUNDS_CHECK(cfg, array_reg, offset, index_reg) do { \
 466             MonoInst *inst; \
 467             MONO_INST_NEW ((cfg), inst, OP_AMD64_ICOMPARE_MEMBASE_REG); \
 468             inst->inst_basereg = array_reg; \
 469             inst->inst_offset = offset; \
 470             inst->sreg2 = index_reg; \
 471             MONO_ADD_INS ((cfg)->cbb, inst); \
 472             MONO_EMIT_NEW_COND_EXC (cfg, LE_UN, "IndexOutOfRangeException"); \
 473        } while (0)
 474
 475 void
 476 mono_amd64_patch (unsigned char* code, gpointer target);
 477
 478 void
 479 mono_amd64_throw_exception (guint64 dummy1, guint64 dummy2, guint64 dummy3, guint64 dummy4,
 480                                                         guint64 dummy5, guint64 dummy6,
 481                                                         MonoContext *mctx, MonoObject *exc, gboolean rethrow);
 482
 483 void
 484 mono_amd64_throw_corlib_exception (guint64 dummy1, guint64 dummy2, guint64 dummy3, guint64 dummy4,
 485                                                                    guint64 dummy5, guint64 dummy6,
 486                                                                    MonoContext *mctx, guint32 ex_token_index, gint64 pc_offset);
 487
 488 void
 489 mono_amd64_resume_unwind (guint64 dummy1, guint64 dummy2, guint64 dummy3, guint64 dummy4,
 490                                                   guint64 dummy5, guint64 dummy6,
 491                                                   MonoContext *mctx, guint32 dummy7, gint64 dummy8);
 492
 493 gpointer
 494 mono_amd64_start_gsharedvt_call (GSharedVtCallInfo *info, gpointer *caller, gpointer *callee, gpointer mrgctx_reg);
 495
 496 guint64
 497 mono_amd64_get_original_ip (void);
 498
 499 GSList*
 500 mono_amd64_get_exception_trampolines (gboolean aot);
 501
 502 int
 503 mono_amd64_get_tls_gs_offset (void) MONO_LLVM_INTERNAL;
 504
 505 #if defined(TARGET_WIN32) && !defined(DISABLE_JIT)
 506
 507 #if G_HAVE_API_SUPPORT(HAVE_CLASSIC_WINAPI_SUPPORT)
 508 #define MONO_ARCH_HAVE_UNWIND_TABLE 1
 509 #define MONO_ARCH_HAVE_CODE_CHUNK_TRACKING 1
 510
 511 #ifdef ENABLE_CHECKED_BUILD
 512 #define ENABLE_CHECKED_BUILD_UNWINDINFO
 513 #endif
 514
 515 #define MONO_MAX_UNWIND_CODES 22
 516
 517 typedef enum _UNWIND_OP_CODES {
 518     UWOP_PUSH_NONVOL = 0, /* info == register number */
 519     UWOP_ALLOC_LARGE,     /* no info, alloc size in next 2 slots */
 520     UWOP_ALLOC_SMALL,     /* info == size of allocation / 8 - 1 */
 521     UWOP_SET_FPREG,       /* no info, FP = RSP + UNWIND_INFO.FPRegOffset*16 */
 522     UWOP_SAVE_NONVOL,     /* info == register number, offset in next slot */
 523     UWOP_SAVE_NONVOL_FAR, /* info == register number, offset in next 2 slots */
 524     UWOP_SAVE_XMM128,     /* info == XMM reg number, offset in next slot */
 525     UWOP_SAVE_XMM128_FAR, /* info == XMM reg number, offset in next 2 slots */
 526     UWOP_PUSH_MACHFRAME   /* info == 0: no error-code, 1: error-code */
 527 } UNWIND_CODE_OPS;
 528
 529 typedef union _UNWIND_CODE {
 530     struct {
 531         guchar CodeOffset;
 532         guchar UnwindOp : 4;
 533         guchar OpInfo   : 4;
 534     };
 535     gushort FrameOffset;
 536 } UNWIND_CODE, *PUNWIND_CODE;
 537
 538 typedef struct _UNWIND_INFO {
 539         guchar Version       : 3;
 540         guchar Flags         : 5;
 541         guchar SizeOfProlog;
 542         guchar CountOfCodes;
 543         guchar FrameRegister : 4;
 544         guchar FrameOffset   : 4;
 545         UNWIND_CODE UnwindCode[MONO_MAX_UNWIND_CODES];
 546 /*      UNWIND_CODE MoreUnwindCode[((CountOfCodes + 1) & ~1) - 1];
 547  *      union {
 548  *              OPTIONAL ULONG ExceptionHandler;
 549  *              OPTIONAL ULONG FunctionEntry;
 550  *      };
 551  *      OPTIONAL ULONG ExceptionData[]; */
 552 } UNWIND_INFO, *PUNWIND_INFO;
 553
 554 static inline guint
 555 mono_arch_unwindinfo_get_size (guchar code_count)
 556 {
 557         // Returned size will be used as the allocated size for unwind data trailing the memory used by compiled method.
 558         // Windows x64 ABI have some requirements on the data written into this memory. Both the RUNTIME_FUNCTION
 559         // and UNWIND_INFO struct needs to be DWORD aligned and the number of elements in unwind codes array
 560         // should have an even number of entries, while the count stored in UNWIND_INFO struct should hold the real number
 561         // of unwind codes. Adding extra bytes to the total size will make sure we can properly align the RUNTIME_FUNCTION
 562         // struct. Since our UNWIND_INFO follows RUNTIME_FUNCTION struct in memory, it will automatically be DWORD aligned
 563         // as well. Also make sure to allocate room for a padding UNWIND_CODE, if needed.
 564         return (sizeof (mgreg_t) + sizeof (UNWIND_INFO)) -
 565                 (sizeof (UNWIND_CODE) * ((MONO_MAX_UNWIND_CODES - ((code_count + 1) & ~1))));
 566 }
 567
 568 guchar
 569 mono_arch_unwindinfo_get_code_count (GSList *unwind_ops);
 570
 571 guint
 572 mono_arch_unwindinfo_init_method_unwind_info (gpointer cfg);
 573
 574 void
 575 mono_arch_unwindinfo_install_method_unwind_info (gpointer *monoui, gpointer code, guint code_size);
 576
 577 void
 578 mono_arch_unwindinfo_install_tramp_unwind_info (GSList *unwind_ops, gpointer code, guint code_size);
 579
 580 void
 581 mono_arch_code_chunk_new (void *chunk, int size);
 582
 583 void
 584 mono_arch_code_chunk_destroy (void *chunk);
 585
 586 #endif /* G_HAVE_API_SUPPORT(HAVE_CLASSIC_WINAPI_SUPPORT) */
 587 #endif /* defined(TARGET_WIN32) && !defined(DISABLE_JIT) */
 588
 589 #ifdef MONO_ARCH_HAVE_UNWIND_TABLE
 590 // Allocate additional size for max 3 unwind ops (push + fp or sp small|large) + unwind info struct trailing code buffer.
 591 #define MONO_TRAMPOLINE_UNWINDINFO_SIZE(max_code_count) (mono_arch_unwindinfo_get_size (max_code_count))
 592 #define MONO_MAX_TRAMPOLINE_UNWINDINFO_SIZE (MONO_TRAMPOLINE_UNWINDINFO_SIZE(3))
 593
 594 static inline gboolean
 595 mono_arch_unwindinfo_validate_size (GSList *unwind_ops, guint max_size)
 596 {
 597         guint current_size = mono_arch_unwindinfo_get_size (mono_arch_unwindinfo_get_code_count (unwind_ops));
 598         return current_size <= max_size;
 599 }
 600
 601 #else
 602
 603 #define MONO_TRAMPOLINE_UNWINDINFO_SIZE(max_code_count) 0
 604 #define MONO_MAX_TRAMPOLINE_UNWINDINFO_SIZE 0
 605
 606 static inline gboolean
 607 mono_arch_unwindinfo_validate_size (GSList *unwind_ops, guint max_size)
 608 {
 609         return TRUE;
 610 }
 611 #endif
 612
 613 CallInfo* mono_arch_get_call_info (MonoMemPool *mp, MonoMethodSignature *sig);
 614
 615 #endif /* __MONO_MINI_AMD64_H__ */
 616