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 #include "mono/utils/mono-tls-inline.h"
  24
  25 /*
  26  * mono_arch_get_unbox_trampoline:
  27  * @m: method pointer
  28  * @addr: pointer to native code for @m
  29  *
  30  * when value type methods are called through the vtable we need to unbox the
  31  * this argument. This method returns a pointer to a trampoline which does
  32  * unboxing before calling the method
  33  */
  34 gpointer
  35 mono_arch_get_unbox_trampoline (MonoMethod *m, gpointer addr)
  36 {
  37         guint8 *code, *start;
  38         int reg;
  39
  40         start = code = mono_domain_code_reserve (mono_domain_get (), 36);
  41
  42         /* This executes in the context of the caller, hence o0 */
  43         sparc_add_imm (code, 0, sparc_o0, MONO_ABI_SIZEOF (MonoObject), sparc_o0);
  44 #ifdef SPARCV9
  45         reg = sparc_g4;
  46 #else
  47         reg = sparc_g1;
  48 #endif
  49         sparc_set (code, addr, reg);
  50         sparc_jmpl (code, reg, sparc_g0, sparc_g0);
  51         sparc_nop (code);
  52
  53         g_assert ((code - start) <= 36);
  54
  55         mono_arch_flush_icache (start, code - start);
  56         MONO_PROFILER_RAISE (jit_code_buffer, (start, code - start, MONO_PROFILER_CODE_BUFFER_UNBOX_TRAMPOLINE, m));
  57
  58         mono_tramp_info_register (mono_tramp_info_create (NULL, start, code - start, NULL, NULL), NULL);
  59
  60         return start;
  61 }
  62
  63 void
  64 mono_arch_patch_callsite (guint8 *method_start, guint8 *code, guint8 *addr)
  65 {
  66         if (sparc_inst_op (*(guint32*)code) == 0x1) {
  67                 sparc_call_simple (code, (guint8*)addr - (guint8*)code);
  68         }
  69 }
  70
  71 void
  72 mono_arch_patch_plt_entry (guint8 *code, gpointer *got, host_mgreg_t *regs, guint8 *addr)
  73 {
  74         g_assert_not_reached ();
  75 }
  76
  77 guchar*
  78 mono_arch_create_generic_trampoline (MonoTrampolineType tramp_type, MonoTrampInfo **info, gboolean aot)
  79 {
  80         guint8 *buf, *code, *tramp_addr;
  81         guint32 lmf_offset, regs_offset, method_reg, i;
  82         gboolean has_caller;
  83
  84         g_assert (!aot);
  85         *info = NULL;
  86
  87         if (tramp_type == MONO_TRAMPOLINE_JUMP)
  88                 has_caller = FALSE;
  89         else
  90                 has_caller = TRUE;
  91
  92         code = buf = mono_global_codeman_reserve (1024);
  93
  94         sparc_save_imm (code, sparc_sp, -1608, sparc_sp);
  95
  96 #ifdef SPARCV9
  97         method_reg = sparc_g4;
  98 #else
  99         method_reg = sparc_g1;
 100 #endif
 101
 102         regs_offset = MONO_SPARC_STACK_BIAS + 1000;
 103
 104         /* Save r1 needed by the IMT code */
 105         sparc_sti_imm (code, sparc_g1, sparc_sp, regs_offset + (sparc_g1 * sizeof (target_mgreg_t)));
 106
 107         /*
 108          * sparc_g5 contains the return address, the trampoline argument is stored in the
 109          * instruction stream after the call.
 110          */
 111         sparc_ld_imm (code, sparc_g5, 8, method_reg);
 112
 113 #ifdef SPARCV9
 114         /* Save fp regs since they are not preserved by calls */
 115         for (i = 0; i < 16; i ++)
 116                 sparc_stdf_imm (code, sparc_f0 + (i * 2), sparc_sp, MONO_SPARC_STACK_BIAS + 320 + (i * 8));
 117 #endif
 118
 119         /* We receive the method address in %r1, so save it here */
 120         sparc_sti_imm (code, method_reg, sparc_sp, MONO_SPARC_STACK_BIAS + 200);
 121
 122         /* Save lmf since compilation can raise exceptions */
 123         lmf_offset = MONO_SPARC_STACK_BIAS - sizeof (MonoLMF);
 124
 125         /* Save the data for the parent (managed) frame */
 126
 127         /* Save ip */
 128         sparc_sti_imm (code, sparc_i7, sparc_fp, lmf_offset + G_STRUCT_OFFSET (MonoLMF, ip));
 129         /* Save sp */
 130         sparc_sti_imm (code, sparc_fp, sparc_fp, lmf_offset + G_STRUCT_OFFSET (MonoLMF, sp));
 131         /* Save fp */
 132         /* Load previous fp from the saved register window */
 133         sparc_flushw (code);
 134         sparc_ldi_imm (code, sparc_fp, MONO_SPARC_STACK_BIAS + (sparc_i6 - 16) * sizeof (target_mgreg_t), sparc_o7);
 135         sparc_sti_imm (code, sparc_o7, sparc_fp, lmf_offset + G_STRUCT_OFFSET (MonoLMF, ebp));
 136         /* Save method */
 137         sparc_sti_imm (code, method_reg, sparc_fp, lmf_offset + G_STRUCT_OFFSET (MonoLMF, method));
 138
 139         sparc_set (code, mono_get_lmf_addr, sparc_o7);
 140         sparc_jmpl (code, sparc_o7, sparc_g0, sparc_o7);
 141         sparc_nop (code);
 142
 143         code = mono_sparc_emit_save_lmf (code, lmf_offset);
 144
 145         if (has_caller) {
 146                 /* Load all registers of the caller into a table inside this frame */
 147                 /* first the out registers */
 148                 for (i = 0; i < 8; ++i)
 149                         sparc_sti_imm (code, sparc_i0 + i, sparc_sp, regs_offset + ((sparc_o0 + i) * sizeof (target_mgreg_t)));
 150                 /* then the in+local registers */
 151                 for (i = 0; i < 16; i ++) {
 152                         sparc_ldi_imm (code, sparc_fp, MONO_SPARC_STACK_BIAS + (i * sizeof (target_mgreg_t)), sparc_o7);
 153                         sparc_sti_imm (code, sparc_o7, sparc_sp, regs_offset + ((sparc_l0 + i) * sizeof (target_mgreg_t)));
 154                 }
 155         }
 156
 157         tramp_addr = mono_get_trampoline_func (tramp_type);
 158         sparc_ldi_imm (code, sparc_sp, MONO_SPARC_STACK_BIAS + 200, sparc_o2);
 159         /* pass address of register table as third argument */
 160         sparc_add_imm (code, FALSE, sparc_sp, regs_offset, sparc_o0);
 161         sparc_set (code, tramp_addr, sparc_o7);
 162         /* set %o1 to caller address */
 163         if (has_caller)
 164                 sparc_mov_reg_reg (code, sparc_i7, sparc_o1);
 165         else
 166                 sparc_set (code, 0, sparc_o1);
 167         sparc_set (code, 0, sparc_o3);
 168         sparc_jmpl (code, sparc_o7, sparc_g0, sparc_o7);
 169         sparc_nop (code);
 170
 171         /* Save result */
 172         sparc_sti_imm (code, sparc_o0, sparc_sp, MONO_SPARC_STACK_BIAS + 304);
 173
 174         /* Check for thread interruption */
 175         sparc_set (code, (guint8*)mono_interruption_checkpoint_from_trampoline_deprecated, sparc_o7);
 176         sparc_jmpl (code, sparc_o7, sparc_g0, sparc_o7);
 177         sparc_nop (code);
 178
 179         /* Restore lmf */
 180         code = mono_sparc_emit_restore_lmf (code, lmf_offset);
 181
 182         /* Reload result */
 183         sparc_ldi_imm (code, sparc_sp, MONO_SPARC_STACK_BIAS + 304, sparc_o0);
 184
 185 #ifdef SPARCV9
 186         /* Reload fp regs */
 187         for (i = 0; i < 16; i ++)
 188                 sparc_lddf_imm (code, sparc_sp, MONO_SPARC_STACK_BIAS + 320 + (i * 8), sparc_f0 + (i * 2));
 189 #endif
 190
 191         sparc_jmpl (code, sparc_o0, sparc_g0, sparc_g0);
 192
 193         /* restore previous frame in delay slot */
 194         sparc_restore_simple (code);
 195
 196 /*
 197 {
 198         gpointer addr;
 199
 200         sparc_save_imm (code, sparc_sp, -608, sparc_sp);
 201         addr = code;
 202         sparc_call_simple (code, 16);
 203         sparc_nop (code);
 204         sparc_rett_simple (code);
 205         sparc_nop (code);
 206
 207         sparc_save_imm (code, sparc_sp, -608, sparc_sp);
 208         sparc_ta (code, 1);
 209         tramp_addr = &sparc_magic_trampoline;
 210         sparc_call_simple (code, tramp_addr - code);
 211         sparc_nop (code);
 212         sparc_rett_simple (code);
 213         sparc_nop (code);
 214 }
 215 */
 216
 217         g_assert ((code - buf) <= 512);
 218
 219         mono_arch_flush_icache (buf, code - buf);
 220         MONO_PROFILER_RAISE (jit_code_buffer, (buf, code - buf, MONO_PROFILER_CODE_BUFFER_HELPER, NULL));
 221
 222         return buf;
 223 }
 224
 225 #define TRAMPOLINE_SIZE (SPARC_SET_MAX_SIZE + 3)
 226
 227 gpointer
 228 mono_arch_create_specific_trampoline (gpointer arg1, MonoTrampolineType tramp_type, MonoDomain *domain, guint32 *code_len)
 229 {
 230         guint32 *code, *buf, *tramp;
 231
 232         tramp = mono_get_trampoline_code (tramp_type);
 233
 234         code = buf = mono_domain_code_reserve (domain, TRAMPOLINE_SIZE * 4);
 235
 236         /* We have to use g5 here because there is no other free register */
 237         sparc_set (code, tramp, sparc_g5);
 238         sparc_jmpl (code, sparc_g5, sparc_g0, sparc_g5);
 239         sparc_nop (code);
 240 #ifdef SPARCV9
 241         g_assert_not_reached ();
 242 #else
 243         *code = (guint32)arg1;
 244         code ++;
 245 #endif
 246
 247         g_assert ((code - buf) <= TRAMPOLINE_SIZE);
 248
 249         if (code_len)
 250                 *code_len = (code - buf);
 251
 252         mono_arch_flush_icache ((guint8*)buf, (code - buf));
 253         MONO_PROFILER_RAISE (jit_code_buffer, (buf, code - buf, MONO_PROFILER_CODE_BUFFER_SPECIFIC_TRAMPOLINE, mono_get_generic_trampoline_simple_name (tramp_type)));
 254
 255         return buf;
 256 }
 257
 258 gpointer
 259 mono_arch_create_rgctx_lazy_fetch_trampoline (guint32 slot, MonoTrampInfo **info, gboolean aot)
 260 {
 261         /* FIXME: implement! */
 262         g_assert_not_reached ();
 263         return NULL;
 264 }