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 #if defined(ARM_FPU_NONE) || (defined(__ARM_EABI__) && !defined(ARM_FPU_VFP) && !defined(ARM_FPU_VFP_HARD))
  13 #define MONO_ARCH_SOFT_FLOAT 1
  14 #endif
  15
  16 #ifdef ARM_FPU_VFP_HARD
  17 #error "hardfp-abi not yet supported."
  18 #endif
  19
  20 #if defined(__ARM_EABI__)
  21 #if G_BYTE_ORDER == G_LITTLE_ENDIAN
  22 #define ARM_ARCHITECTURE "armel"
  23 #else
  24 #define ARM_ARCHITECTURE "armeb"
  25 #endif
  26 #else
  27 #define ARM_ARCHITECTURE "arm"
  28 #endif
  29
  30 #if defined(ARM_FPU_FPA)
  31 #define ARM_FP_MODEL "fpa"
  32 #elif defined(ARM_FPU_VFP)
  33 #define ARM_FP_MODEL "vfp"
  34 #elif defined(ARM_FPU_NONE)
  35 #define ARM_FP_MODEL "soft-float"
  36 #elif defined(ARM_FPU_VFP_HARD)
  37 #define ARM_FP_MODEL "vfp(hardfp-abi)"
  38 #else
  39 #error "At least one of ARM_FPU_NONE, ARM_FPU_FPA, 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 #define MONO_MAX_FREGS 16
  56
  57 #define MONO_SAVED_GREGS 10 /* r4-r11, ip, lr */
  58 #define MONO_SAVED_FREGS 8
  59
  60 /* r4-r11, ip, lr: registers saved in the LMF  */
  61 #define MONO_ARM_REGSAVE_MASK 0x5ff0
  62 #define MONO_ARM_FIRST_SAVED_REG ARMREG_R4
  63 #define MONO_ARM_NUM_SAVED_REGS 10
  64
  65 /* Parameters used by the register allocator */
  66
  67 #define MONO_ARCH_CALLEE_REGS ((1<<ARMREG_R0) | (1<<ARMREG_R1) | (1<<ARMREG_R2) | (1<<ARMREG_R3) | (1<<ARMREG_IP))
  68 #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))
  69
  70 #if defined(ARM_FPU_VFP) || defined(ARM_FPU_VFP_HARD)
  71 /* Every double precision vfp register, d0/d1 is reserved for a scratch reg */
  72 #define MONO_ARCH_CALLEE_FREGS 0x55555550
  73 #else
  74 #define MONO_ARCH_CALLEE_FREGS 0xf
  75 #endif
  76 #define MONO_ARCH_CALLEE_SAVED_FREGS 0
  77
  78 #define MONO_ARCH_USE_FPSTACK FALSE
  79 #define MONO_ARCH_FPSTACK_SIZE 0
  80
  81 #define MONO_ARCH_INST_SREG2_MASK(ins) (0)
  82
  83 #ifdef MONO_ARCH_SOFT_FLOAT
  84 #define MONO_ARCH_INST_FIXED_REG(desc) (((desc) == 'l' || (desc == 'f') || (desc == 'g')) ? ARM_LSW_REG: (((desc) == 'a') ? ARMREG_R0 : -1))
  85 #define MONO_ARCH_INST_IS_REGPAIR(desc) ((desc) == 'l' || (desc) == 'L' || (desc) == 'f' || (desc) == 'g')
  86 #define MONO_ARCH_INST_IS_FLOAT(desc) (FALSE)
  87 #else
  88 #define MONO_ARCH_INST_FIXED_REG(desc) (((desc) == 'l')? ARM_LSW_REG: (((desc) == 'a') ? ARMREG_R0 : -1))
  89 #define MONO_ARCH_INST_IS_REGPAIR(desc) (desc == 'l' || desc == 'L')
  90 #define MONO_ARCH_INST_IS_FLOAT(desc) ((desc == 'f') || (desc == 'g'))
  91 #endif
  92 #define MONO_ARCH_INST_REGPAIR_REG2(desc,hreg1) (desc == 'l'  || (desc == 'f') || (desc == 'g')? ARM_MSW_REG : -1)
  93
  94 #define MONO_ARCH_FRAME_ALIGNMENT 8
  95
  96 /* fixme: align to 16byte instead of 32byte (we align to 32byte to get
  97  * reproduceable results for benchmarks */
  98 #define MONO_ARCH_CODE_ALIGNMENT 32
  99
 100 void arm_patch (guchar *code, const guchar *target);
 101 guint8* mono_arm_emit_load_imm (guint8 *code, int dreg, guint32 val);
 102 int mono_arm_is_rotated_imm8 (guint32 val, gint *rot_amount);
 103
 104 void
 105 mono_arm_throw_exception_by_token (guint32 type_token, mgreg_t pc, mgreg_t sp, mgreg_t *int_regs, gdouble *fp_regs);
 106
 107 typedef enum {
 108         MONO_ARM_FPU_NONE = 0,
 109         MONO_ARM_FPU_FPA = 1,
 110         MONO_ARM_FPU_VFP = 2,
 111         MONO_ARM_FPU_VFP_HARD = 3
 112 } MonoArmFPU;
 113
 114 /* keep the size of the structure a multiple of 8 */
 115 struct MonoLMF {
 116         /*
 117          * If the second lowest bit is set to 1, then this is a MonoLMFExt structure, and
 118          * the other fields are not valid.
 119          */
 120         gpointer    previous_lmf;
 121         gpointer    lmf_addr;
 122         /* This is only set in trampoline LMF frames */
 123         MonoMethod *method;
 124         mgreg_t    sp;
 125         mgreg_t    ip;
 126         mgreg_t    fp;
 127         /* all but sp and pc: matches the PUSH instruction layout in the trampolines
 128          * 0-4 should be considered undefined (execpt in the magic tramp)
 129          * sp is saved at IP.
 130          */
 131         mgreg_t    iregs [14];
 132 };
 133
 134 typedef struct MonoCompileArch {
 135         gpointer seq_point_info_var, ss_trigger_page_var;
 136         gpointer seq_point_read_var, seq_point_ss_method_var;
 137         gpointer seq_point_bp_method_var;
 138         gboolean omit_fp, omit_fp_computed;
 139         gpointer cinfo;
 140 } MonoCompileArch;
 141
 142 #define MONO_ARCH_EMULATE_FCONV_TO_I8 1
 143 #define MONO_ARCH_EMULATE_LCONV_TO_R8 1
 144 #define MONO_ARCH_EMULATE_LCONV_TO_R4 1
 145 #define MONO_ARCH_EMULATE_LCONV_TO_R8_UN 1
 146 #define MONO_ARCH_EMULATE_FREM 1
 147 #define MONO_ARCH_EMULATE_DIV 1
 148 #define MONO_ARCH_EMULATE_CONV_R8_UN 1
 149 #define MONO_ARCH_EMULATE_MUL_OVF 1
 150 //#define MONO_ARCH_BIGMUL_INTRINS 1
 151
 152 #define ARM_FIRST_ARG_REG 0
 153 #define ARM_LAST_ARG_REG 3
 154
 155 #define MONO_ARCH_USE_SIGACTION 1
 156 #define MONO_ARCH_NEED_DIV_CHECK 1
 157
 158 #define MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
 159 #define MONO_ARCH_HAVE_XP_UNWIND 1
 160 #define MONO_ARCH_HAVE_GENERALIZED_IMT_THUNK 1
 161
 162 #define ARM_NUM_REG_ARGS (ARM_LAST_ARG_REG-ARM_FIRST_ARG_REG+1)
 163 #define ARM_NUM_REG_FPARGS 0
 164
 165 #define MONO_ARCH_HAVE_FULL_AOT_TRAMPOLINES 1
 166 #define MONO_ARCH_HAVE_IMT 1
 167 #define MONO_ARCH_HAVE_DECOMPOSE_LONG_OPTS 1
 168
 169 #define MONO_ARCH_AOT_SUPPORTED 1
 170 #define MONO_ARCH_LLVM_SUPPORTED 1
 171 #define MONO_ARCH_THIS_AS_FIRST_ARG 1
 172
 173 #define MONO_ARCH_GSHARED_SUPPORTED 1
 174 #define MONO_ARCH_DYN_CALL_SUPPORTED 1
 175 #define MONO_ARCH_DYN_CALL_PARAM_AREA 24
 176
 177 #define MONO_ARCH_SOFT_DEBUG_SUPPORTED 1
 178 #define MONO_ARCH_HAVE_EXCEPTIONS_INIT 1
 179 #define MONO_ARCH_HAVE_GET_TRAMPOLINES 1
 180 #define MONO_ARCH_HAVE_CONTEXT_SET_INT_REG 1
 181 #define MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX 1
 182 #define MONO_ARCH_GC_MAPS_SUPPORTED 1
 183 #define MONO_ARCH_HAVE_SETUP_ASYNC_CALLBACK 1
 184 #define MONO_ARCH_HAVE_CONTEXT_SET_INT_REG 1
 185 #define MONO_ARCH_HAVE_SETUP_RESUME_FROM_SIGNAL_HANDLER_CTX 1
 186
 187 /* Matches the HAVE_AEABI_READ_TP define in mini-arm.c */
 188 #if defined(__ARM_EABI__) && defined(__linux__) && !defined(TARGET_ANDROID)
 189 #define MONO_ARCH_HAVE_TLS_GET 1
 190 #endif
 191
 192 /* ARM doesn't have too many registers, so we have to use a callee saved one */
 193 #define MONO_ARCH_RGCTX_REG ARMREG_V5
 194 /* First argument reg */
 195 #define MONO_ARCH_VTABLE_REG ARMREG_R0
 196
 197 #define MONO_CONTEXT_SET_LLVM_EXC_REG(ctx, exc) do { (ctx)->regs [0] = (gsize)exc; } while (0)
 198
 199 #define MONO_INIT_CONTEXT_FROM_FUNC(ctx,func) do {      \
 200                 MONO_CONTEXT_SET_BP ((ctx), __builtin_frame_address (0));       \
 201                 MONO_CONTEXT_SET_SP ((ctx), __builtin_frame_address (0));       \
 202                 MONO_CONTEXT_SET_IP ((ctx), (func));    \
 203         } while (0)
 204
 205 #define MONO_ARCH_INIT_TOP_LMF_ENTRY(lmf)
 206
 207 void
 208 mono_arm_throw_exception (MonoObject *exc, mgreg_t pc, mgreg_t sp, mgreg_t *int_regs, gdouble *fp_regs);
 209
 210 void
 211 mono_arm_throw_exception_by_token (guint32 type_token, mgreg_t pc, mgreg_t sp, mgreg_t *int_regs, gdouble *fp_regs);
 212
 213 void
 214 mono_arm_resume_unwind (guint32 dummy1, mgreg_t pc, mgreg_t sp, mgreg_t *int_regs, gdouble *fp_regs);
 215
 216 gboolean
 217 mono_arm_thumb_supported (void);
 218
 219 GSList*
 220 mono_arm_get_exception_trampolines (gboolean aot) MONO_INTERNAL;
 221
 222 guint8*
 223 mono_arm_get_thumb_plt_entry (guint8 *code) MONO_INTERNAL;
 224
 225 #endif /* __MONO_MINI_ARM_H__ */
 226