mono/mini/tramp-sparc.c

   1 /**
   2  * \file
   3  * JIT trampoline code for Sparc
   4  *
   5  * Authors:
   6  *   Mark Crichton (crichton@gimp.org)
   7  *   Dietmar Maurer (dietmar@ximian.com)
   8  *
   9  * (C) 2003 Ximian, Inc.
  10  */
  11
  12 #include <config.h>
  13 #include <glib.h>
  14
  15 #include <mono/arch/sparc/sparc-codegen.h>
  16 #include <mono/metadata/appdomain.h>
  17 #include <mono/metadata/marshal.h>
  18 #include <mono/metadata/tabledefs.h>
  19
  20 #include "mini.h"
  21 #include "mini-sparc.h"
  22 #include "jit-icalls.h"
  23
  24 /*
  25  * mono_arch_get_unbox_trampoline:
  26  * @m: method pointer
  27  * @addr: pointer to native code for @m
  28  *
  29  * when value type methods are called through the vtable we need to unbox the
  30  * this argument. This method returns a pointer to a trampoline which does
  31  * unboxing before calling the method
  32  */
  33 gpointer
  34 mono_arch_get_unbox_trampoline (MonoMethod *m, gpointer addr)
  35 {
  36         guint8 *code, *start;
  37         int reg;
  38
  39         start = code = mono_domain_code_reserve (mono_domain_get (), 36);
  40
  41         /* This executes in the context of the caller, hence o0 */
  42         sparc_add_imm (code, 0, sparc_o0, MONO_ABI_SIZEOF (MonoObject), sparc_o0);
  43 #ifdef SPARCV9
  44         reg = sparc_g4;
  45 #else
  46         reg = sparc_g1;
  47 #endif
  48         sparc_set (code, addr, reg);
  49         sparc_jmpl (code, reg, sparc_g0, sparc_g0);
  50         sparc_nop (code);
  51
  52         g_assert ((code - start) <= 36);
  53
  54         mono_arch_flush_icache (start, code - start);
  55         MONO_PROFILER_RAISE (jit_code_buffer, (start, code - start, MONO_PROFILER_CODE_BUFFER_UNBOX_TRAMPOLINE, m));
  56
  57         mono_tramp_info_register (mono_tramp_info_create (NULL, start, code - start, NULL, NULL), NULL);
  58
  59         return start;
  60 }
  61
  62 void
  63 mono_arch_patch_callsite (guint8 *method_start, guint8 *code, guint8 *addr)
  64 {
  65         if (sparc_inst_op (*(guint32*)code) == 0x1) {
  66                 sparc_call_simple (code, (guint8*)addr - (guint8*)code);
  67         }
  68 }
  69
  70 void
  71 mono_arch_patch_plt_entry (guint8 *code, gpointer *got, host_mgreg_t *regs, guint8 *addr)
  72 {
  73         g_assert_not_reached ();
  74 }
  75
  76 guchar*
  77 mono_arch_create_generic_trampoline (MonoTrampolineType tramp_type, MonoTrampInfo **info, gboolean aot)
  78 {
  79         guint8 *buf, *code, *tramp_addr;
  80         guint32 lmf_offset, regs_offset, method_reg, i;
  81         gboolean has_caller;
  82
  83         g_assert (!aot);
  84         *info = NULL;
  85
  86         if (tramp_type == MONO_TRAMPOLINE_JUMP)
  87                 has_caller = FALSE;
  88         else
  89                 has_caller = TRUE;
  90
  91         code = buf = mono_global_codeman_reserve (1024);
  92
  93         sparc_save_imm (code, sparc_sp, -1608, sparc_sp);
  94
  95 #ifdef SPARCV9
  96         method_reg = sparc_g4;
  97 #else
  98         method_reg = sparc_g1;
  99 #endif
 100
 101         regs_offset = MONO_SPARC_STACK_BIAS + 1000;
 102
 103         /* Save r1 needed by the IMT code */
 104         sparc_sti_imm (code, sparc_g1, sparc_sp, regs_offset + (sparc_g1 * sizeof (target_mgreg_t)));
 105
 106         /*
 107          * sparc_g5 contains the return address, the trampoline argument is stored in the
 108          * instruction stream after the call.
 109          */
 110         sparc_ld_imm (code, sparc_g5, 8, method_reg);
 111
 112 #ifdef SPARCV9
 113         /* Save fp regs since they are not preserved by calls */
 114         for (i = 0; i < 16; i ++)
 115                 sparc_stdf_imm (code, sparc_f0 + (i * 2), sparc_sp, MONO_SPARC_STACK_BIAS + 320 + (i * 8));
 116 #endif
 117
 118         /* We receive the method address in %r1, so save it here */
 119         sparc_sti_imm (code, method_reg, sparc_sp, MONO_SPARC_STACK_BIAS + 200);
 120
 121         /* Save lmf since compilation can raise exceptions */
 122         lmf_offset = MONO_SPARC_STACK_BIAS - sizeof (MonoLMF);
 123
 124         /* Save the data for the parent (managed) frame */
 125
 126         /* Save ip */
 127         sparc_sti_imm (code, sparc_i7, sparc_fp, lmf_offset + G_STRUCT_OFFSET (MonoLMF, ip));
 128         /* Save sp */
 129         sparc_sti_imm (code, sparc_fp, sparc_fp, lmf_offset + G_STRUCT_OFFSET (MonoLMF, sp));
 130         /* Save fp */
 131         /* Load previous fp from the saved register window */
 132         sparc_flushw (code);
 133         sparc_ldi_imm (code, sparc_fp, MONO_SPARC_STACK_BIAS + (sparc_i6 - 16) * sizeof (target_mgreg_t), sparc_o7);
 134         sparc_sti_imm (code, sparc_o7, sparc_fp, lmf_offset + G_STRUCT_OFFSET (MonoLMF, ebp));
 135         /* Save method */
 136         sparc_sti_imm (code, method_reg, sparc_fp, lmf_offset + G_STRUCT_OFFSET (MonoLMF, method));
 137
 138         sparc_set (code, mono_get_lmf_addr, sparc_o7);
 139         sparc_jmpl (code, sparc_o7, sparc_g0, sparc_o7);
 140         sparc_nop (code);
 141
 142         code = mono_sparc_emit_save_lmf (code, lmf_offset);
 143
 144         if (has_caller) {
 145                 /* Load all registers of the caller into a table inside this frame */
 146                 /* first the out registers */
 147                 for (i = 0; i < 8; ++i)
 148                         sparc_sti_imm (code, sparc_i0 + i, sparc_sp, regs_offset + ((sparc_o0 + i) * sizeof (target_mgreg_t)));
 149                 /* then the in+local registers */
 150                 for (i = 0; i < 16; i ++) {
 151                         sparc_ldi_imm (code, sparc_fp, MONO_SPARC_STACK_BIAS + (i * sizeof (target_mgreg_t)), sparc_o7);
 152                         sparc_sti_imm (code, sparc_o7, sparc_sp, regs_offset + ((sparc_l0 + i) * sizeof (target_mgreg_t)));
 153                 }
 154         }
 155
 156         tramp_addr = mono_get_trampoline_func (tramp_type);
 157         sparc_ldi_imm (code, sparc_sp, MONO_SPARC_STACK_BIAS + 200, sparc_o2);
 158         /* pass address of register table as third argument */
 159         sparc_add_imm (code, FALSE, sparc_sp, regs_offset, sparc_o0);
 160         sparc_set (code, tramp_addr, sparc_o7);
 161         /* set %o1 to caller address */
 162         if (has_caller)
 163                 sparc_mov_reg_reg (code, sparc_i7, sparc_o1);
 164         else
 165                 sparc_set (code, 0, sparc_o1);
 166         sparc_set (code, 0, sparc_o3);
 167         sparc_jmpl (code, sparc_o7, sparc_g0, sparc_o7);
 168         sparc_nop (code);
 169
 170         /* Save result */
 171         sparc_sti_imm (code, sparc_o0, sparc_sp, MONO_SPARC_STACK_BIAS + 304);
 172
 173         /* Check for thread interruption */
 174         sparc_set (code, (guint8*)mono_interruption_checkpoint_from_trampoline_deprecated, sparc_o7);
 175         sparc_jmpl (code, sparc_o7, sparc_g0, sparc_o7);
 176         sparc_nop (code);
 177
 178         /* Restore lmf */
 179         code = mono_sparc_emit_restore_lmf (code, lmf_offset);
 180
 181         /* Reload result */
 182         sparc_ldi_imm (code, sparc_sp, MONO_SPARC_STACK_BIAS + 304, sparc_o0);
 183
 184 #ifdef SPARCV9
 185         /* Reload fp regs */
 186         for (i = 0; i < 16; i ++)
 187                 sparc_lddf_imm (code, sparc_sp, MONO_SPARC_STACK_BIAS + 320 + (i * 8), sparc_f0 + (i * 2));
 188 #endif
 189
 190         sparc_jmpl (code, sparc_o0, sparc_g0, sparc_g0);
 191
 192         /* restore previous frame in delay slot */
 193         sparc_restore_simple (code);
 194
 195 /*
 196 {
 197         gpointer addr;
 198
 199         sparc_save_imm (code, sparc_sp, -608, sparc_sp);
 200         addr = code;
 201         sparc_call_simple (code, 16);
 202         sparc_nop (code);
 203         sparc_rett_simple (code);
 204         sparc_nop (code);
 205
 206         sparc_save_imm (code, sparc_sp, -608, sparc_sp);
 207         sparc_ta (code, 1);
 208         tramp_addr = &sparc_magic_trampoline;
 209         sparc_call_simple (code, tramp_addr - code);
 210         sparc_nop (code);
 211         sparc_rett_simple (code);
 212         sparc_nop (code);
 213 }
 214 */
 215
 216         g_assert ((code - buf) <= 512);
 217
 218         mono_arch_flush_icache (buf, code - buf);
 219         MONO_PROFILER_RAISE (jit_code_buffer, (buf, code - buf, MONO_PROFILER_CODE_BUFFER_HELPER, NULL));
 220
 221         return buf;
 222 }
 223
 224 #define TRAMPOLINE_SIZE (SPARC_SET_MAX_SIZE + 3)
 225
 226 gpointer
 227 mono_arch_create_specific_trampoline (gpointer arg1, MonoTrampolineType tramp_type, MonoDomain *domain, guint32 *code_len)
 228 {
 229         guint32 *code, *buf, *tramp;
 230
 231         tramp = mono_get_trampoline_code (tramp_type);
 232
 233         code = buf = mono_domain_code_reserve (domain, TRAMPOLINE_SIZE * 4);
 234
 235         /* We have to use g5 here because there is no other free register */
 236         sparc_set (code, tramp, sparc_g5);
 237         sparc_jmpl (code, sparc_g5, sparc_g0, sparc_g5);
 238         sparc_nop (code);
 239 #ifdef SPARCV9
 240         g_assert_not_reached ();
 241 #else
 242         *code = (guint32)arg1;
 243         code ++;
 244 #endif
 245
 246         g_assert ((code - buf) <= TRAMPOLINE_SIZE);
 247
 248         if (code_len)
 249                 *code_len = (code - buf);
 250
 251         mono_arch_flush_icache ((guint8*)buf, (code - buf));
 252         MONO_PROFILER_RAISE (jit_code_buffer, (buf, code - buf, MONO_PROFILER_CODE_BUFFER_SPECIFIC_TRAMPOLINE, mono_get_generic_trampoline_simple_name (tramp_type)));
 253
 254         return buf;
 255 }
 256
 257 gpointer
 258 mono_arch_create_rgctx_lazy_fetch_trampoline (guint32 slot, MonoTrampInfo **info, gboolean aot)
 259 {
 260         /* FIXME: implement! */
 261         g_assert_not_reached ();
 262         return NULL;
 263 }