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)
53 if (!m->signature->ret->byref && MONO_TYPE_ISSTRUCT (m->signature->ret))
56 start = code = g_malloc (32);
58 /* This executes in the context of the caller, hence o0 */
59 sparc_add_imm (code, 0, sparc_o0, sizeof (MonoObject), sparc_o0);
60 sparc_set (code, addr, sparc_g1);
61 sparc_jmpl (code, sparc_g1, sparc_g0, sparc_g0);
64 g_assert ((code - start) <= 32);
66 mono_arch_flush_icache (start, code - start);
72 * sparc_magic_trampoline:
73 * @m: the method to translate
74 * @code: the address of the call instruction
75 * @fp: address of the stack frame for the caller
77 * This method is called by the trampoline functions for methods. It calls the
78 * JIT compiler to compile the method, then patches the calling instruction so
79 * further calls will bypass the trampoline. For virtual methods, it finds the
80 * address of the vtable slot and updates it.
83 sparc_magic_trampoline (MonoMethod *m, guint32 *code, guint32 *fp)
86 gpointer *vtable_slot;
88 addr = mono_compile_method (m);
92 * Check whenever this is a virtual call, and call an unbox trampoline if
95 if (mono_sparc_is_virtual_call (code)) {
96 if (m->klass->valuetype)
97 addr = get_unbox_trampoline (m, addr);
99 /* Compute address of vtable slot */
100 vtable_slot = mono_sparc_get_vcall_slot_addr (code, fp);
104 /* Patch calling code */
105 if (sparc_inst_op (*code) == 0x1)
106 sparc_call_simple (code, (guint8*)addr - (guint8*)code);
113 sparc_class_init_trampoline (MonoVTable *vtable, guint32 *code)
115 mono_runtime_class_init (vtable);
117 /* Patch calling code */
122 create_trampoline_code (MonoTrampolineType tramp_type)
124 guint8 *buf, *code, *tramp_addr;
126 static guint8* generic_jump_trampoline = NULL;
127 static guint8 *generic_class_init_trampoline = NULL;
129 switch (tramp_type) {
130 case MONO_TRAMPOLINE_GENERIC:
131 if (mono_generic_trampoline_code)
132 return mono_generic_trampoline_code;
134 case MONO_TRAMPOLINE_JUMP:
135 if (generic_jump_trampoline)
136 return generic_jump_trampoline;
138 case MONO_TRAMPOLINE_CLASS_INIT:
139 if (generic_class_init_trampoline)
140 return generic_class_init_trampoline;
144 code = buf = g_malloc (256);
146 /* FIXME: save lmf etc */
148 sparc_save_imm (code, sparc_sp, -200, sparc_sp);
150 /* We receive the method address in %r1, so save it here */
151 sparc_st_imm (code, sparc_g1, sparc_sp, 128);
153 /* Save lmf since compilation can raise exceptions */
154 lmf_offset = - sizeof (MonoLMF);
156 /* Save the data for the parent (managed) frame */
159 sparc_st_imm (code, sparc_i7, sparc_fp, lmf_offset + G_STRUCT_OFFSET (MonoLMF, ip));
161 sparc_st_imm (code, sparc_fp, sparc_fp, lmf_offset + G_STRUCT_OFFSET (MonoLMF, sp));
163 /* Load previous fp from the saved register window */
165 sparc_ld_imm (code, sparc_fp, (sparc_i6 - 16) * 4, sparc_o7);
166 sparc_st_imm (code, sparc_o7, sparc_fp, lmf_offset + G_STRUCT_OFFSET (MonoLMF, ebp));
168 sparc_st_imm (code, sparc_g1, sparc_fp, lmf_offset + G_STRUCT_OFFSET (MonoLMF, method));
170 sparc_call_simple (code, (guint8*)mono_get_lmf_addr - (guint8*)code);
173 code = mono_sparc_emit_save_lmf (code, lmf_offset);
175 if (tramp_type == MONO_TRAMPOLINE_CLASS_INIT)
176 tramp_addr = &sparc_class_init_trampoline;
178 tramp_addr = &sparc_magic_trampoline;
179 sparc_ld_imm (code, sparc_sp, 128, sparc_o0);
180 /* pass parent frame address as third argument */
181 sparc_mov_reg_reg (code, sparc_fp, sparc_o2);
182 sparc_call_simple (code, tramp_addr - code);
183 /* set %o1 to caller address in delay slot */
184 sparc_mov_reg_reg (code, sparc_i7, sparc_o1);
187 sparc_st_imm (code, sparc_o0, sparc_sp, 128);
190 code = mono_sparc_emit_restore_lmf (code, lmf_offset);
193 sparc_ld_imm (code, sparc_sp, 128, sparc_o0);
195 if (tramp_type == MONO_TRAMPOLINE_CLASS_INIT)
198 sparc_jmpl (code, sparc_o0, sparc_g0, sparc_g0);
200 /* restore previous frame in delay slot */
201 sparc_restore_simple (code);
203 g_assert ((code - buf) <= 256);
205 switch (tramp_type) {
206 case MONO_TRAMPOLINE_GENERIC:
207 mono_generic_trampoline_code = buf;
209 case MONO_TRAMPOLINE_JUMP:
210 generic_jump_trampoline = buf;
212 case MONO_TRAMPOLINE_CLASS_INIT:
213 generic_class_init_trampoline = buf;
217 mono_arch_flush_icache (buf, code - buf);
222 #define TRAMPOLINE_SIZE (((SPARC_SET_MAX_SIZE >> 2) * 2) + 2)
225 create_specific_trampoline (gpointer arg1, MonoTrampolineType tramp_type)
228 guint32 *code, *buf, *tramp;
230 tramp = create_trampoline_code (tramp_type);
232 code = buf = g_malloc (TRAMPOLINE_SIZE * 4);
234 /* We have to use g5 here because there is no other free register */
235 sparc_set (code, tramp, sparc_g5);
236 sparc_set (code, arg1, sparc_r1);
237 sparc_jmpl (code, sparc_g5, sparc_g0, sparc_g0);
240 g_assert ((code - buf) <= TRAMPOLINE_SIZE);
242 ji = g_new0 (MonoJitInfo, 1);
243 ji->code_start = buf;
244 ji->code_size = (code - buf) * 4;
246 mono_jit_stats.method_trampolines++;
248 mono_arch_flush_icache (ji->code_start, ji->code_size);
254 mono_arch_create_jump_trampoline (MonoMethod *method)
256 MonoJitInfo *ji = create_specific_trampoline (method, MONO_TRAMPOLINE_JUMP);
263 * mono_arch_create_jit_trampoline:
264 * @method: pointer to the method info
266 * Creates a trampoline function for virtual methods. If the created
267 * code is called it first starts JIT compilation of method,
268 * and then calls the newly created method. I also replaces the
269 * corresponding vtable entry (see sparc_magic_trampoline).
271 * Returns: a pointer to the newly created code
274 mono_arch_create_jit_trampoline (MonoMethod *method)
278 /* previously created trampoline code */
282 if (method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED)
283 return mono_arch_create_jit_trampoline (mono_marshal_get_synchronized_wrapper (method));
285 ji = create_specific_trampoline (method, MONO_TRAMPOLINE_GENERIC);
286 method->info = ji->code_start;
293 * mono_arch_create_class_init_trampoline:
294 * @vtable: the type to initialize
296 * Creates a trampoline function to run a type initializer.
297 * If the trampoline is called, it calls mono_runtime_class_init with the
298 * given vtable, then patches the caller code so it does not get called any
301 * Returns: a pointer to the newly created code
304 mono_arch_create_class_init_trampoline (MonoVTable *vtable)
309 ji = create_specific_trampoline (vtable, MONO_TRAMPOLINE_CLASS_INIT);
310 code = ji->code_start;
317 * This method is only called when running in the Mono Debugger.
320 mono_debugger_create_notification_function (gpointer *notification_address)
324 ptr = buf = g_malloc0 (16);
325 //x86_breakpoint (buf);
326 if (notification_address)
327 *notification_address = buf;