mono/mini/mini-arm.h

   1 /*
   2  * Copyright 2011 Xamarin Inc
   3  */
   4
   5 #ifndef __MONO_MINI_ARM_H__
   6 #define __MONO_MINI_ARM_H__
   7
   8 #include <mono/arch/arm/arm-codegen.h>
   9 #include <mono/utils/mono-context.h>
  10 #include <glib.h>
  11
  12 #ifdef __native_client_codegen__
  13 #define kNaClAlignmentARM 16
  14 #define kNaClAlignmentMaskARM (kNaClAlignmentARM - 1)
  15 #define kNaClLengthOfCallImm 4
  16 #endif
  17
  18 #if defined(ARM_FPU_NONE)
  19 #define MONO_ARCH_SOFT_FLOAT_FALLBACK 1
  20 #endif
  21
  22 #if defined(__ARM_EABI__)
  23 #if G_BYTE_ORDER == G_LITTLE_ENDIAN
  24 #define ARM_ARCHITECTURE "armel"
  25 #else
  26 #define ARM_ARCHITECTURE "armeb"
  27 #endif
  28 #else
  29 #define ARM_ARCHITECTURE "arm"
  30 #endif
  31
  32 #if defined(ARM_FPU_VFP)
  33 #define ARM_FP_MODEL "vfp"
  34 #elif defined(ARM_FPU_NONE)
  35 #define ARM_FP_MODEL "vfp+fallback"
  36 #elif defined(ARM_FPU_VFP_HARD)
  37 #define ARM_FP_MODEL "vfp+hard"
  38 #else
  39 #error "At least one of ARM_FPU_NONE, ARM_FPU_VFP or ARM_FPU_VFP_HARD must be defined."
  40 #endif
  41
  42 #define MONO_ARCH_ARCHITECTURE ARM_ARCHITECTURE "," ARM_FP_MODEL
  43
  44 #define MONO_ARCH_CPU_SPEC arm_cpu_desc
  45
  46 #if G_BYTE_ORDER == G_LITTLE_ENDIAN
  47 #define ARM_LSW_REG ARMREG_R0
  48 #define ARM_MSW_REG ARMREG_R1
  49 #else
  50 #define ARM_LSW_REG ARMREG_R1
  51 #define ARM_MSW_REG ARMREG_R0
  52 #endif
  53
  54 #define MONO_MAX_IREGS 16
  55
  56 #define MONO_SAVED_GREGS 10 /* r4-r11, ip, lr */
  57
  58 /* r4-r11, ip, lr: registers saved in the LMF  */
  59 #define MONO_ARM_REGSAVE_MASK 0x5ff0
  60 #define MONO_ARM_FIRST_SAVED_REG ARMREG_R4
  61 #define MONO_ARM_NUM_SAVED_REGS 10
  62
  63 /* Parameters used by the register allocator */
  64
  65 #define MONO_ARCH_CALLEE_REGS ((1<<ARMREG_R0) | (1<<ARMREG_R1) | (1<<ARMREG_R2) | (1<<ARMREG_R3) | (1<<ARMREG_IP))
  66 #define MONO_ARCH_CALLEE_SAVED_REGS ((1<<ARMREG_V1) | (1<<ARMREG_V2) | (1<<ARMREG_V3) | (1<<ARMREG_V4) | (1<<ARMREG_V5) | (1<<ARMREG_V6) | (1<<ARMREG_V7))
  67
  68 /*
  69  * TODO: Make use of VFP v3 registers d16-d31.
  70  */
  71
  72 /*
  73  * TODO: We can't use registers d8-d15 in hard float mode because the
  74  * register allocator doesn't allocate floating point registers globally.
  75  */
  76
  77 #if defined(ARM_FPU_VFP_HARD)
  78 #define MONO_SAVED_FREGS 16
  79 #define MONO_MAX_FREGS 32
  80
  81 /*
  82  * d8-d15 must be preserved across function calls. We use d14-d15 as
  83  * scratch registers in the JIT. The rest have no meaning tied to them.
  84  */
  85 #define MONO_ARCH_CALLEE_FREGS 0x00005555
  86 #define MONO_ARCH_CALLEE_SAVED_FREGS 0x55550000
  87 #else
  88 #define MONO_SAVED_FREGS 8
  89 #define MONO_MAX_FREGS 16
  90
  91 /*
  92  * No registers need to be preserved across function calls. We use d0-d1
  93  * as scratch registers in the JIT. The rest have no meaning tied to them.
  94  */
  95 #define MONO_ARCH_CALLEE_FREGS 0x55555550
  96 #define MONO_ARCH_CALLEE_SAVED_FREGS 0x00000000
  97 #endif
  98
  99 #define MONO_ARCH_USE_FPSTACK FALSE
 100 #define MONO_ARCH_FPSTACK_SIZE 0
 101
 102 #define MONO_ARCH_INST_SREG2_MASK(ins) (0)
 103
 104 #define MONO_ARCH_INST_FIXED_REG(desc) \
 105         (mono_arch_is_soft_float () ? \
 106         ((desc) == 'l' || (desc) == 'f' || (desc) == 'g' ? ARM_LSW_REG : (desc) == 'a' ? ARMREG_R0 : -1) : \
 107         ((desc) == 'l' ? ARM_LSW_REG : (desc) == 'a' ? ARMREG_R0 : -1))
 108
 109 #define MONO_ARCH_INST_IS_REGPAIR(desc) \
 110         (mono_arch_is_soft_float () ? \
 111         ((desc) == 'l' || (desc) == 'L' || (desc) == 'f' || (desc) == 'g') : \
 112         ((desc) == 'l' || (desc) == 'L'))
 113
 114 #define MONO_ARCH_INST_IS_FLOAT(desc) \
 115         (mono_arch_is_soft_float () ? \
 116         (FALSE) : \
 117         ((desc) == 'f' || (desc) == 'g'))
 118
 119 #define MONO_ARCH_INST_REGPAIR_REG2(desc,hreg1) ((desc) == 'l' || (desc) == 'f' || (desc) == 'g' ? ARM_MSW_REG : -1)
 120
 121 #define MONO_ARCH_FRAME_ALIGNMENT 8
 122
 123 /* fixme: align to 16byte instead of 32byte (we align to 32byte to get
 124  * reproduceable results for benchmarks */
 125 #define MONO_ARCH_CODE_ALIGNMENT 32
 126
 127 /* Argument marshallings for calls between gsharedvt and normal code */
 128 typedef enum {
 129         GSHAREDVT_ARG_NONE = 0,
 130         GSHAREDVT_ARG_BYVAL_TO_BYREF = 1,
 131         GSHAREDVT_ARG_BYREF_TO_BYVAL = 2,
 132         GSHAREDVT_ARG_BYREF_TO_BYVAL_I1 = 3,
 133         GSHAREDVT_ARG_BYREF_TO_BYVAL_I2 = 4,
 134         GSHAREDVT_ARG_BYREF_TO_BYVAL_U1 = 5,
 135         GSHAREDVT_ARG_BYREF_TO_BYVAL_U2 = 6
 136 } GSharedVtArgMarshal;
 137
 138 /* Return value marshalling for calls between gsharedvt and normal code */
 139 typedef enum {
 140         GSHAREDVT_RET_NONE = 0,
 141         GSHAREDVT_RET_IREG = 1,
 142         GSHAREDVT_RET_IREGS = 2,
 143         GSHAREDVT_RET_I1 = 3,
 144         GSHAREDVT_RET_U1 = 4,
 145         GSHAREDVT_RET_I2 = 5,
 146         GSHAREDVT_RET_U2 = 6
 147 } GSharedVtRetMarshal;
 148
 149 typedef struct {
 150         /* Method address to call */
 151         gpointer addr;
 152         /* The trampoline reads this, so keep the size explicit */
 153         int ret_marshal;
 154         /* If ret_marshal != NONE, this is the reg of the vret arg, else -1 */
 155         int vret_arg_reg;
 156         /* The stack slot where the return value will be stored */
 157         int vret_slot;
 158         int stack_usage, map_count;
 159         /* If not -1, then make a virtual call using this vtable offset */
 160         int vcall_offset;
 161         /* If 1, make an indirect call to the address in the rgctx reg */
 162         int calli;
 163         /* Whenever this is a in or an out call */
 164         int gsharedvt_in;
 165         /* Maps stack slots/registers in the caller to the stack slots/registers in the callee */
 166         /* A negative value means a register, i.e. -1=r0, -2=r1 etc. */
 167         int map [MONO_ZERO_LEN_ARRAY];
 168 } GSharedVtCallInfo;
 169
 170 /* Structure used by the sequence points in AOTed code */
 171 typedef struct {
 172         gpointer ss_trigger_page;
 173         gpointer bp_trigger_page;
 174         guint8* bp_addrs [MONO_ZERO_LEN_ARRAY];
 175 } SeqPointInfo;
 176
 177
 178 #define PARAM_REGS 4
 179 #define DYN_CALL_STACK_ARGS 6
 180
 181 typedef struct {
 182         mgreg_t regs [PARAM_REGS + DYN_CALL_STACK_ARGS];
 183         mgreg_t res, res2;
 184         guint8 *ret;
 185 } DynCallArgs;
 186
 187 void arm_patch (guchar *code, const guchar *target);
 188 guint8* mono_arm_emit_load_imm (guint8 *code, int dreg, guint32 val);
 189 int mono_arm_is_rotated_imm8 (guint32 val, gint *rot_amount);
 190
 191 void
 192 mono_arm_throw_exception_by_token (guint32 type_token, mgreg_t pc, mgreg_t sp, mgreg_t *int_regs, gdouble *fp_regs);
 193
 194 gpointer
 195 mono_arm_start_gsharedvt_call (GSharedVtCallInfo *info, gpointer *caller, gpointer *callee, gpointer mrgctx_reg) MONO_INTERNAL;
 196
 197 typedef enum {
 198         MONO_ARM_FPU_NONE = 0,
 199         MONO_ARM_FPU_VFP = 1,
 200         MONO_ARM_FPU_VFP_HARD = 2
 201 } MonoArmFPU;
 202
 203 /* keep the size of the structure a multiple of 8 */
 204 struct MonoLMF {
 205         /*
 206          * If the second lowest bit is set to 1, then this is a MonoLMFExt structure, and
 207          * the other fields are not valid.
 208          */
 209         gpointer    previous_lmf;
 210         gpointer    lmf_addr;
 211         /* This is only set in trampoline LMF frames */
 212         MonoMethod *method;
 213         mgreg_t    sp;
 214         mgreg_t    ip;
 215         mgreg_t    fp;
 216         /* Currently only used in trampolines on armhf to hold d0-d15. We don't really
 217          * need to put d0-d7 in the LMF, but it simplifies the trampoline code.
 218          */
 219         double     fregs [16];
 220         /* all but sp and pc: matches the PUSH instruction layout in the trampolines
 221          * 0-4 should be considered undefined (execpt in the magic tramp)
 222          * sp is saved at IP.
 223          */
 224         mgreg_t    iregs [14];
 225 };
 226
 227 typedef struct MonoCompileArch {
 228         gpointer seq_point_info_var, ss_trigger_page_var;
 229         gpointer seq_point_read_var, seq_point_ss_method_var;
 230         gpointer seq_point_bp_method_var;
 231         gboolean omit_fp, omit_fp_computed;
 232         gpointer cinfo;
 233         gpointer *vfp_scratch_slots [2];
 234         int atomic_tmp_offset;
 235 } MonoCompileArch;
 236
 237 #define MONO_ARCH_EMULATE_FCONV_TO_I8 1
 238 #define MONO_ARCH_EMULATE_LCONV_TO_R8 1
 239 #define MONO_ARCH_EMULATE_LCONV_TO_R4 1
 240 #define MONO_ARCH_EMULATE_LCONV_TO_R8_UN 1
 241 #define MONO_ARCH_EMULATE_FREM 1
 242 #define MONO_ARCH_EMULATE_DIV 1
 243 #define MONO_ARCH_EMULATE_CONV_R8_UN 1
 244 #define MONO_ARCH_EMULATE_MUL_OVF 1
 245 //#define MONO_ARCH_BIGMUL_INTRINS 1
 246
 247 #define ARM_FIRST_ARG_REG 0
 248 #define ARM_LAST_ARG_REG 3
 249
 250 #define MONO_ARCH_USE_SIGACTION 1
 251
 252 #if defined(__native_client__)
 253 #undef MONO_ARCH_USE_SIGACTION
 254 #endif
 255
 256 #define MONO_ARCH_NEED_DIV_CHECK 1
 257
 258 #define MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
 259 #define MONO_ARCH_HAVE_XP_UNWIND 1
 260 #define MONO_ARCH_HAVE_GENERALIZED_IMT_THUNK 1
 261
 262 #define ARM_NUM_REG_ARGS (ARM_LAST_ARG_REG-ARM_FIRST_ARG_REG+1)
 263 #define ARM_NUM_REG_FPARGS 0
 264
 265 #define MONO_ARCH_HAVE_FULL_AOT_TRAMPOLINES 1
 266 #define MONO_ARCH_HAVE_DECOMPOSE_LONG_OPTS 1
 267
 268 #define MONO_ARCH_AOT_SUPPORTED 1
 269 #define MONO_ARCH_LLVM_SUPPORTED 1
 270 #define MONO_ARCH_THIS_AS_FIRST_ARG 1
 271
 272 #define MONO_ARCH_GSHARED_SUPPORTED 1
 273 #define MONO_ARCH_DYN_CALL_SUPPORTED 1
 274 #define MONO_ARCH_DYN_CALL_PARAM_AREA 24
 275
 276 #ifndef MONO_CROSS_COMPILE
 277 #define MONO_ARCH_SOFT_DEBUG_SUPPORTED 1
 278 #endif
 279
 280 #define MONO_ARCH_HAVE_EXCEPTIONS_INIT 1
 281 #define MONO_ARCH_HAVE_GET_TRAMPOLINES 1
 282 #define MONO_ARCH_HAVE_CONTEXT_SET_INT_REG 1
 283 #define MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX 1
 284 #define MONO_ARCH_GC_MAPS_SUPPORTED 1
 285 #define MONO_ARCH_HAVE_SETUP_ASYNC_CALLBACK 1
 286 #define MONO_ARCH_HAVE_CONTEXT_SET_INT_REG 1
 287 #define MONO_ARCH_HAVE_SETUP_RESUME_FROM_SIGNAL_HANDLER_CTX 1
 288 #define MONO_ARCH_GSHAREDVT_SUPPORTED 1
 289 #define MONO_ARCH_HAVE_GENERAL_RGCTX_LAZY_FETCH_TRAMPOLINE 1
 290 #define MONO_ARCH_HAVE_OPCODE_NEEDS_EMULATION 1
 291 #define MONO_ARCH_HAVE_OBJC_GET_SELECTOR 1
 292 #ifdef __linux__
 293 #define MONO_ARCH_HAVE_OP_TAIL_CALL 1
 294 #endif
 295 #define MONO_ARCH_HAVE_DUMMY_INIT 1
 296
 297 #if defined(__native_client__)
 298 #undef MONO_ARCH_SOFT_DEBUG_SUPPORTED
 299 #undef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
 300 #undef MONO_ARCH_HAVE_CONTEXT_SET_INT_REG
 301 #endif
 302
 303 /* Matches the HAVE_AEABI_READ_TP define in mini-arm.c */
 304 #if defined(__ARM_EABI__) && defined(__linux__) && !defined(TARGET_ANDROID) && !defined(__native_client__)
 305 #define MONO_ARCH_HAVE_TLS_GET 1
 306 #endif
 307
 308 /* ARM doesn't have too many registers, so we have to use a callee saved one */
 309 #define MONO_ARCH_RGCTX_REG ARMREG_V5
 310 /* First argument reg */
 311 #define MONO_ARCH_VTABLE_REG ARMREG_R0
 312
 313 #define MONO_CONTEXT_SET_LLVM_EXC_REG(ctx, exc) do { (ctx)->regs [0] = (gsize)exc; } while (0)
 314
 315 #define MONO_INIT_CONTEXT_FROM_FUNC(ctx,func) do {      \
 316                 MONO_CONTEXT_SET_BP ((ctx), __builtin_frame_address (0));       \
 317                 MONO_CONTEXT_SET_SP ((ctx), __builtin_frame_address (0));       \
 318                 MONO_CONTEXT_SET_IP ((ctx), (func));    \
 319         } while (0)
 320
 321 #define MONO_ARCH_INIT_TOP_LMF_ENTRY(lmf)
 322
 323 void
 324 mono_arm_throw_exception (MonoObject *exc, mgreg_t pc, mgreg_t sp, mgreg_t *int_regs, gdouble *fp_regs);
 325
 326 void
 327 mono_arm_throw_exception_by_token (guint32 type_token, mgreg_t pc, mgreg_t sp, mgreg_t *int_regs, gdouble *fp_regs);
 328
 329 void
 330 mono_arm_resume_unwind (guint32 dummy1, mgreg_t pc, mgreg_t sp, mgreg_t *int_regs, gdouble *fp_regs);
 331
 332 gboolean
 333 mono_arm_thumb_supported (void);
 334
 335 GSList*
 336 mono_arm_get_exception_trampolines (gboolean aot) MONO_INTERNAL;
 337
 338 guint8*
 339 mono_arm_get_thumb_plt_entry (guint8 *code) MONO_INTERNAL;
 340
 341 guint8*
 342 mono_arm_patchable_b (guint8 *code, int cond);
 343
 344 guint8*
 345 mono_arm_patchable_bl (guint8 *code, int cond);
 346
 347 #ifdef USE_JUMP_TABLES
 348 guint8*
 349 mono_arm_load_jumptable_entry_addr (guint8 *code, gpointer *jte, ARMReg reg) MONO_INTERNAL;
 350
 351 guint8*
 352 mono_arm_load_jumptable_entry (guint8 *code, gpointer *jte, ARMReg reg) MONO_INTERNAL;
 353 #endif
 354
 355 gboolean
 356 mono_arm_is_hard_float (void) MONO_INTERNAL;
 357
 358 #endif /* __MONO_MINI_ARM_H__ */