2 * tramp-sparc.c: JIT trampoline code for Sparc 64
5 * Mark Crichton (crichton@gimp.org)
6 * Dietmar Maurer (dietmar@ximian.com)
8 * (C) 2003 Ximian, Inc.
14 #include <mono/arch/sparc/sparc-codegen.h>
15 #include <mono/metadata/appdomain.h>
16 #include <mono/metadata/marshal.h>
17 #include <mono/metadata/tabledefs.h>
18 #include <mono/metadata/mono-debug-debugger.h>
21 #include "mini-sparc.h"
24 MONO_TRAMPOLINE_GENERIC,
26 MONO_TRAMPOLINE_CLASS_INIT
29 /* adapt to mini later... */
30 #define mono_jit_share_code (1)
33 * Address of the Sparc trampoline code. This is used by the debugger to check
34 * whether a method is a trampoline.
36 guint8 *mono_generic_trampoline_code = NULL;
39 * get_unbox_trampoline:
41 * @addr: pointer to native code for @m
43 * when value type methods are called through the vtable we need to unbox the
44 * this argument. This method returns a pointer to a trampoline which does
45 * unboxing before calling the method
48 get_unbox_trampoline (MonoMethod *m, gpointer addr)
51 int this_pos = 4, reg;
53 if (!m->signature->ret->byref && MONO_TYPE_ISSTRUCT (m->signature->ret))
56 start = code = g_malloc (36);
58 /* This executes in the context of the caller, hence o0 */
59 sparc_add_imm (code, 0, sparc_o0, sizeof (MonoObject), sparc_o0);
65 sparc_set (code, addr, reg);
66 sparc_jmpl (code, reg, sparc_g0, sparc_g0);
69 g_assert ((code - start) <= 36);
71 mono_arch_flush_icache (start, code - start);
77 * sparc_magic_trampoline:
78 * @m: the method to translate
79 * @code: the address of the call instruction
80 * @fp: address of the stack frame for the caller
82 * This method is called by the trampoline functions for methods. It calls the
83 * JIT compiler to compile the method, then patches the calling instruction so
84 * further calls will bypass the trampoline. For virtual methods, it finds the
85 * address of the vtable slot and updates it.
88 sparc_magic_trampoline (MonoMethod *m, guint32 *code, guint32 *fp)
91 gpointer *vtable_slot;
93 addr = mono_compile_method (m);
97 * Check whenever this is a virtual call, and call an unbox trampoline if
100 if (mono_sparc_is_virtual_call (code)) {
101 if (m->klass->valuetype)
102 addr = get_unbox_trampoline (m, addr);
104 /* Compute address of vtable slot */
105 vtable_slot = mono_sparc_get_vcall_slot_addr (code, fp);
109 /* Patch calling code */
110 if (sparc_inst_op (*code) == 0x1) {
112 mono_jit_info_table_find (mono_domain_get (), code);
113 MonoJitInfo *target_ji =
114 mono_jit_info_table_find (mono_domain_get (), addr);
116 /* The first part of the condition means an icall without a wrapper */
117 if ((!target_ji && m->addr) || mono_method_same_domain (ji, target_ji)) {
118 sparc_call_simple (code, (guint8*)addr - (guint8*)code);
127 sparc_class_init_trampoline (MonoVTable *vtable, guint32 *code)
129 mono_runtime_class_init (vtable);
131 /* Patch calling code */
135 #define ALIGN_TO(val,align) (((val) + ((align) - 1)) & ~((align) - 1))
138 create_trampoline_code (MonoTrampolineType tramp_type)
140 guint8 *buf, *code, *tramp_addr;
141 guint32 lmf_offset, method_reg, i;
142 static guint8* generic_jump_trampoline = NULL;
143 static guint8 *generic_class_init_trampoline = NULL;
145 switch (tramp_type) {
146 case MONO_TRAMPOLINE_GENERIC:
147 if (mono_generic_trampoline_code)
148 return mono_generic_trampoline_code;
150 case MONO_TRAMPOLINE_JUMP:
151 if (generic_jump_trampoline)
152 return generic_jump_trampoline;
154 case MONO_TRAMPOLINE_CLASS_INIT:
155 if (generic_class_init_trampoline)
156 return generic_class_init_trampoline;
160 code = buf = g_malloc (512);
162 sparc_save_imm (code, sparc_sp, -608, sparc_sp);
165 method_reg = sparc_g4;
167 method_reg = sparc_g1;
171 /* Save fp regs since they are not preserved by calls */
172 for (i = 0; i < 16; i ++)
173 sparc_stdf_imm (code, sparc_f0 + (i * 2), sparc_sp, MONO_SPARC_STACK_BIAS + 320 + (i * 8));
176 /* We receive the method address in %r1, so save it here */
177 sparc_sti_imm (code, method_reg, sparc_sp, MONO_SPARC_STACK_BIAS + 200);
179 /* Save lmf since compilation can raise exceptions */
180 lmf_offset = MONO_SPARC_STACK_BIAS - sizeof (MonoLMF);
182 /* Save the data for the parent (managed) frame */
185 sparc_sti_imm (code, sparc_i7, sparc_fp, lmf_offset + G_STRUCT_OFFSET (MonoLMF, ip));
187 sparc_sti_imm (code, sparc_fp, sparc_fp, lmf_offset + G_STRUCT_OFFSET (MonoLMF, sp));
189 /* Load previous fp from the saved register window */
191 sparc_ldi_imm (code, sparc_fp, MONO_SPARC_STACK_BIAS + (sparc_i6 - 16) * sizeof (gpointer), sparc_o7);
192 sparc_sti_imm (code, sparc_o7, sparc_fp, lmf_offset + G_STRUCT_OFFSET (MonoLMF, ebp));
194 sparc_sti_imm (code, method_reg, sparc_fp, lmf_offset + G_STRUCT_OFFSET (MonoLMF, method));
196 sparc_set (code, mono_get_lmf_addr, sparc_o7);
197 sparc_jmpl (code, sparc_o7, sparc_g0, sparc_o7);
200 code = mono_sparc_emit_save_lmf (code, lmf_offset);
202 if (tramp_type == MONO_TRAMPOLINE_CLASS_INIT)
203 tramp_addr = &sparc_class_init_trampoline;
205 tramp_addr = &sparc_magic_trampoline;
206 sparc_ldi_imm (code, sparc_sp, MONO_SPARC_STACK_BIAS + 200, sparc_o0);
207 /* pass parent frame address as third argument */
208 sparc_mov_reg_reg (code, sparc_fp, sparc_o2);
209 sparc_set (code, tramp_addr, sparc_o7);
210 /* set %o1 to caller address */
211 sparc_mov_reg_reg (code, sparc_i7, sparc_o1);
212 sparc_jmpl (code, sparc_o7, sparc_g0, sparc_o7);
216 sparc_sti_imm (code, sparc_o0, sparc_sp, MONO_SPARC_STACK_BIAS + 304);
219 code = mono_sparc_emit_restore_lmf (code, lmf_offset);
222 sparc_ldi_imm (code, sparc_sp, MONO_SPARC_STACK_BIAS + 304, sparc_o0);
226 for (i = 0; i < 16; i ++)
227 sparc_lddf_imm (code, sparc_sp, MONO_SPARC_STACK_BIAS + 320 + (i * 8), sparc_f0 + (i * 2));
230 if (tramp_type == MONO_TRAMPOLINE_CLASS_INIT)
233 sparc_jmpl (code, sparc_o0, sparc_g0, sparc_g0);
235 /* restore previous frame in delay slot */
236 sparc_restore_simple (code);
242 sparc_save_imm (code, sparc_sp, -608, sparc_sp);
244 sparc_call_simple (code, 16);
246 sparc_rett_simple (code);
249 sparc_save_imm (code, sparc_sp, -608, sparc_sp);
251 tramp_addr = &sparc_magic_trampoline;
252 sparc_call_simple (code, tramp_addr - code);
254 sparc_rett_simple (code);
259 g_assert ((code - buf) <= 512);
261 switch (tramp_type) {
262 case MONO_TRAMPOLINE_GENERIC:
263 mono_generic_trampoline_code = buf;
265 case MONO_TRAMPOLINE_JUMP:
266 generic_jump_trampoline = buf;
268 case MONO_TRAMPOLINE_CLASS_INIT:
269 generic_class_init_trampoline = buf;
273 mono_arch_flush_icache (buf, code - buf);
278 #define TRAMPOLINE_SIZE (((SPARC_SET_MAX_SIZE >> 2) * 2) + 2)
281 create_specific_trampoline (gpointer arg1, MonoTrampolineType tramp_type, MonoDomain *domain)
284 guint32 *code, *buf, *tramp;
286 tramp = create_trampoline_code (tramp_type);
288 mono_domain_lock (domain);
289 code = buf = mono_code_manager_reserve (domain->code_mp, TRAMPOLINE_SIZE * 4);
290 mono_domain_unlock (domain);
292 /* We have to use g5 here because there is no other free register */
293 sparc_set (code, tramp, sparc_g5);
295 sparc_set (code, arg1, sparc_g4);
297 sparc_set (code, arg1, sparc_g1);
299 sparc_jmpl (code, sparc_g5, sparc_g0, sparc_g0);
302 g_assert ((code - buf) <= TRAMPOLINE_SIZE);
304 ji = g_new0 (MonoJitInfo, 1);
305 ji->code_start = buf;
306 ji->code_size = (code - buf) * 4;
308 mono_jit_stats.method_trampolines++;
310 mono_arch_flush_icache (ji->code_start, ji->code_size);
316 mono_arch_create_jump_trampoline (MonoMethod *method)
318 MonoJitInfo *ji = create_specific_trampoline (method, MONO_TRAMPOLINE_JUMP, mono_domain_get ());
325 * mono_arch_create_jit_trampoline:
326 * @method: pointer to the method info
328 * Creates a trampoline function for virtual methods. If the created
329 * code is called it first starts JIT compilation of method,
330 * and then calls the newly created method. I also replaces the
331 * corresponding vtable entry (see sparc_magic_trampoline).
333 * Returns: a pointer to the newly created code
336 mono_arch_create_jit_trampoline (MonoMethod *method)
340 /* previously created trampoline code */
344 if (method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED)
345 return mono_arch_create_jit_trampoline (mono_marshal_get_synchronized_wrapper (method));
347 ji = create_specific_trampoline (method, MONO_TRAMPOLINE_GENERIC, mono_domain_get ());
348 method->info = ji->code_start;
355 * mono_arch_create_class_init_trampoline:
356 * @vtable: the type to initialize
358 * Creates a trampoline function to run a type initializer.
359 * If the trampoline is called, it calls mono_runtime_class_init with the
360 * given vtable, then patches the caller code so it does not get called any
363 * Returns: a pointer to the newly created code
366 mono_arch_create_class_init_trampoline (MonoVTable *vtable)
371 ji = create_specific_trampoline (vtable, MONO_TRAMPOLINE_CLASS_INIT, vtable->domain);
372 code = ji->code_start;
379 * This method is only called when running in the Mono Debugger.
382 mono_debugger_create_notification_function (gpointer *notification_address)
386 ptr = buf = g_malloc0 (16);
387 if (notification_address)
388 *notification_address = buf;
390 g_assert_not_reached ();