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
76 * This method is called by the trampoline functions for methods. It calls the
77 * JIT compiler to compile the method, then patches the calling instruction so
78 * further calls will bypass the trampoline. For virtual methods, it finds the
79 * address of the vtable slot and updates it.
82 sparc_magic_trampoline (MonoMethod *m, guint32 *code)
86 addr = mono_compile_method (m);
89 /* FIXME: patch calling code and vtable */
90 if ((sparc_inst_op (*code) == 0x2) && (sparc_inst_op3 (*code) == 0x38)) {
91 /* FIXME: is this allways a vcall ? */
92 /* indirect call through a vtable */
94 if (m->klass->valuetype)
95 addr = get_unbox_trampoline (m, addr);
102 sparc_class_init_trampoline (MonoVTable *vtable, guint32 *code)
104 mono_runtime_class_init (vtable);
106 /* FIXME: patch calling code */
110 create_trampoline_code (MonoTrampolineType tramp_type)
112 guint8 *buf, *code, *tramp_addr;
113 static guint8* generic_jump_trampoline = NULL;
114 static guint8 *generic_class_init_trampoline = NULL;
116 switch (tramp_type) {
117 case MONO_TRAMPOLINE_GENERIC:
118 if (mono_generic_trampoline_code)
119 return mono_generic_trampoline_code;
121 case MONO_TRAMPOLINE_JUMP:
122 if (generic_jump_trampoline)
123 return generic_jump_trampoline;
125 case MONO_TRAMPOLINE_CLASS_INIT:
126 if (generic_class_init_trampoline)
127 return generic_class_init_trampoline;
131 code = buf = g_malloc (256);
133 /* FIXME: save lmf etc */
135 sparc_save_imm (code, sparc_sp, -200, sparc_sp);
137 /* We receive the method address in %r1 */
138 sparc_mov_reg_reg (code, sparc_g1, sparc_o0);
140 if (tramp_type == MONO_TRAMPOLINE_CLASS_INIT)
141 tramp_addr = &sparc_class_init_trampoline;
143 tramp_addr = &sparc_magic_trampoline;
144 sparc_call_simple (code, tramp_addr - code);
145 /* set %o1 to caller address in delay slot */
146 sparc_mov_reg_reg (code, sparc_i7, sparc_o1);
148 if (tramp_type == MONO_TRAMPOLINE_CLASS_INIT)
151 sparc_jmpl (code, sparc_o0, sparc_g0, sparc_g0);
153 /* restore previous frame in delay slot */
154 sparc_restore_simple (code);
156 g_assert ((code - buf) <= 256);
158 switch (tramp_type) {
159 case MONO_TRAMPOLINE_GENERIC:
160 mono_generic_trampoline_code = buf;
162 case MONO_TRAMPOLINE_JUMP:
163 generic_jump_trampoline = buf;
165 case MONO_TRAMPOLINE_CLASS_INIT:
166 generic_class_init_trampoline = buf;
170 /* FIXME: flush icache */
175 #define TRAMPOLINE_SIZE (((SPARC_SET_MAX_SIZE >> 2) * 2) + 2)
178 create_specific_trampoline (gpointer arg1, MonoTrampolineType tramp_type)
181 guint32 *code, *buf, *tramp;
183 tramp = create_trampoline_code (tramp_type);
185 code = buf = g_malloc (TRAMPOLINE_SIZE * 4);
187 /* %l0 is caller saved so we can use it */
188 sparc_set (code, tramp, sparc_l0);
189 sparc_set (code, arg1, sparc_r1);
190 sparc_jmpl (code, sparc_l0, sparc_g0, sparc_g0);
193 g_assert ((code - buf) <= TRAMPOLINE_SIZE);
195 ji = g_new0 (MonoJitInfo, 1);
196 ji->code_start = buf;
197 ji->code_size = (code - buf) * 4;
199 mono_jit_stats.method_trampolines++;
201 /* FIXME: flush icache */
207 mono_arch_create_jump_trampoline (MonoMethod *method)
209 MonoJitInfo *ji = create_specific_trampoline (method, MONO_TRAMPOLINE_GENERIC);
216 * mono_arch_create_jit_trampoline:
217 * @method: pointer to the method info
219 * Creates a trampoline function for virtual methods. If the created
220 * code is called it first starts JIT compilation of method,
221 * and then calls the newly created method. I also replaces the
222 * corresponding vtable entry (see sparc_magic_trampoline).
224 * Returns: a pointer to the newly created code
227 mono_arch_create_jit_trampoline (MonoMethod *method)
231 /* previously created trampoline code */
235 if (method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED)
236 return mono_arch_create_jit_trampoline (mono_marshal_get_synchronized_wrapper (method));
238 ji = create_specific_trampoline (method, MONO_TRAMPOLINE_GENERIC);
239 method->info = ji->code_start;
246 * mono_arch_create_class_init_trampoline:
247 * @vtable: the type to initialize
249 * Creates a trampoline function to run a type initializer.
250 * If the trampoline is called, it calls mono_runtime_class_init with the
251 * given vtable, then patches the caller code so it does not get called any
254 * Returns: a pointer to the newly created code
257 mono_arch_create_class_init_trampoline (MonoVTable *vtable)
262 ji = create_specific_trampoline (vtable, MONO_TRAMPOLINE_CLASS_INIT);
263 code = ji->code_start;
270 * This method is only called when running in the Mono Debugger.
273 mono_debugger_create_notification_function (gpointer *notification_address)
277 ptr = buf = g_malloc0 (16);
278 //x86_breakpoint (buf);
279 if (notification_address)
280 *notification_address = buf;