2 * tramp-sparc.c: JIT trampoline code for Sparc
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_arch_get_unbox_trampoline:
26 * @addr: pointer to native code for @m
28 * when value type methods are called through the vtable we need to unbox the
29 * this argument. This method returns a pointer to a trampoline which does
30 * unboxing before calling the method
33 mono_arch_get_unbox_trampoline (MonoMethod *m, gpointer addr)
36 int this_pos = 4, reg;
38 if (!mono_method_signature (m)->ret->byref && MONO_TYPE_ISSTRUCT (mono_method_signature (m)->ret))
41 start = code = mono_global_codeman_reserve (36);
43 /* This executes in the context of the caller, hence o0 */
44 sparc_add_imm (code, 0, sparc_o0, sizeof (MonoObject), sparc_o0);
50 sparc_set (code, addr, reg);
51 sparc_jmpl (code, reg, sparc_g0, sparc_g0);
54 g_assert ((code - start) <= 36);
56 mono_arch_flush_icache (start, code - start);
62 mono_arch_patch_callsite (guint8 *code, guint8 *addr)
64 if (sparc_inst_op (*code) == 0x1) {
65 sparc_call_simple (code, (guint8*)addr - (guint8*)code);
70 mono_arch_nullify_class_init_trampoline (guint8 *code, gssize *regs)
72 /* Patch calling code */
76 #define ALIGN_TO(val,align) (((val) + ((align) - 1)) & ~((align) - 1))
79 mono_arch_create_trampoline_code (MonoTrampolineType tramp_type)
81 guint8 *buf, *code, *tramp_addr;
82 guint32 lmf_offset, regs_offset, method_reg, i;
85 if (tramp_type == MONO_TRAMPOLINE_JUMP)
90 code = buf = mono_global_codeman_reserve (1024);
92 sparc_save_imm (code, sparc_sp, -1608, sparc_sp);
95 method_reg = sparc_g4;
97 method_reg = sparc_g1;
101 /* Save fp regs since they are not preserved by calls */
102 for (i = 0; i < 16; i ++)
103 sparc_stdf_imm (code, sparc_f0 + (i * 2), sparc_sp, MONO_SPARC_STACK_BIAS + 320 + (i * 8));
106 /* We receive the method address in %r1, so save it here */
107 sparc_sti_imm (code, method_reg, sparc_sp, MONO_SPARC_STACK_BIAS + 200);
109 /* Save lmf since compilation can raise exceptions */
110 lmf_offset = MONO_SPARC_STACK_BIAS - sizeof (MonoLMF);
112 /* Save the data for the parent (managed) frame */
115 sparc_sti_imm (code, sparc_i7, sparc_fp, lmf_offset + G_STRUCT_OFFSET (MonoLMF, ip));
117 sparc_sti_imm (code, sparc_fp, sparc_fp, lmf_offset + G_STRUCT_OFFSET (MonoLMF, sp));
119 /* Load previous fp from the saved register window */
121 sparc_ldi_imm (code, sparc_fp, MONO_SPARC_STACK_BIAS + (sparc_i6 - 16) * sizeof (gpointer), sparc_o7);
122 sparc_sti_imm (code, sparc_o7, sparc_fp, lmf_offset + G_STRUCT_OFFSET (MonoLMF, ebp));
124 sparc_sti_imm (code, method_reg, sparc_fp, lmf_offset + G_STRUCT_OFFSET (MonoLMF, method));
126 sparc_set (code, mono_get_lmf_addr, sparc_o7);
127 sparc_jmpl (code, sparc_o7, sparc_g0, sparc_o7);
130 code = mono_sparc_emit_save_lmf (code, lmf_offset);
132 regs_offset = MONO_SPARC_STACK_BIAS + 1000;
135 /* Load all registers of the caller into a table inside this frame */
136 /* first the out registers */
137 for (i = 0; i < 8; ++i)
138 sparc_sti_imm (code, sparc_i0 + i, sparc_sp, regs_offset + (i * sizeof (gpointer)));
139 /* then the in+local registers */
140 for (i = 0; i < 16; i ++) {
141 sparc_ldi_imm (code, sparc_fp, MONO_SPARC_STACK_BIAS + (i * sizeof (gpointer)), sparc_o7);
142 sparc_sti_imm (code, sparc_o7, sparc_sp, regs_offset + ((i + 8) * sizeof (gpointer)));
146 if (tramp_type == MONO_TRAMPOLINE_CLASS_INIT)
147 tramp_addr = &mono_class_init_trampoline;
149 tramp_addr = &mono_magic_trampoline;
150 sparc_ldi_imm (code, sparc_sp, MONO_SPARC_STACK_BIAS + 200, sparc_o0);
151 /* pass address of register table as third argument */
152 sparc_add_imm (code, FALSE, sparc_sp, regs_offset, sparc_o2);
153 sparc_set (code, tramp_addr, sparc_o7);
154 /* set %o1 to caller address */
156 sparc_mov_reg_reg (code, sparc_i7, sparc_o1);
158 sparc_set (code, 0, sparc_o1);
159 sparc_jmpl (code, sparc_o7, sparc_g0, sparc_o7);
163 sparc_sti_imm (code, sparc_o0, sparc_sp, MONO_SPARC_STACK_BIAS + 304);
166 code = mono_sparc_emit_restore_lmf (code, lmf_offset);
169 sparc_ldi_imm (code, sparc_sp, MONO_SPARC_STACK_BIAS + 304, sparc_o0);
173 for (i = 0; i < 16; i ++)
174 sparc_lddf_imm (code, sparc_sp, MONO_SPARC_STACK_BIAS + 320 + (i * 8), sparc_f0 + (i * 2));
177 if (tramp_type == MONO_TRAMPOLINE_CLASS_INIT)
180 sparc_jmpl (code, sparc_o0, sparc_g0, sparc_g0);
182 /* restore previous frame in delay slot */
183 sparc_restore_simple (code);
189 sparc_save_imm (code, sparc_sp, -608, sparc_sp);
191 sparc_call_simple (code, 16);
193 sparc_rett_simple (code);
196 sparc_save_imm (code, sparc_sp, -608, sparc_sp);
198 tramp_addr = &sparc_magic_trampoline;
199 sparc_call_simple (code, tramp_addr - code);
201 sparc_rett_simple (code);
206 g_assert ((code - buf) <= 512);
208 mono_arch_flush_icache (buf, code - buf);
213 #define TRAMPOLINE_SIZE (((SPARC_SET_MAX_SIZE >> 2) * 2) + 2)
216 create_specific_trampoline (gpointer arg1, MonoTrampolineType tramp_type, MonoDomain *domain)
219 guint32 *code, *buf, *tramp;
221 tramp = mono_get_trampoline_code (tramp_type);
223 mono_domain_lock (domain);
224 code = buf = mono_code_manager_reserve (domain->code_mp, TRAMPOLINE_SIZE * 4);
225 mono_domain_unlock (domain);
227 /* We have to use g5 here because there is no other free register */
228 sparc_set (code, tramp, sparc_g5);
230 sparc_set (code, arg1, sparc_g4);
232 sparc_set (code, arg1, sparc_g1);
234 sparc_jmpl (code, sparc_g5, sparc_g0, sparc_g0);
237 g_assert ((code - buf) <= TRAMPOLINE_SIZE);
239 ji = g_new0 (MonoJitInfo, 1);
240 ji->code_start = buf;
241 ji->code_size = (code - buf) * 4;
243 mono_jit_stats.method_trampolines++;
245 mono_arch_flush_icache (ji->code_start, ji->code_size);
251 mono_arch_create_jump_trampoline (MonoMethod *method)
253 MonoJitInfo *ji = create_specific_trampoline (method, MONO_TRAMPOLINE_JUMP, mono_domain_get ());
260 * mono_arch_create_jit_trampoline:
261 * @method: pointer to the method info
263 * Creates a trampoline function for virtual methods. If the created
264 * code is called it first starts JIT compilation of method,
265 * and then calls the newly created method. I also replaces the
266 * corresponding vtable entry (see sparc_magic_trampoline).
268 * Returns: a pointer to the newly created code
271 mono_arch_create_jit_trampoline (MonoMethod *method)
276 ji = create_specific_trampoline (method, MONO_TRAMPOLINE_GENERIC, mono_domain_get ());
277 code_start = ji->code_start;
284 * mono_arch_create_class_init_trampoline:
285 * @vtable: the type to initialize
287 * Creates a trampoline function to run a type initializer.
288 * If the trampoline is called, it calls mono_runtime_class_init with the
289 * given vtable, then patches the caller code so it does not get called any
292 * Returns: a pointer to the newly created code
295 mono_arch_create_class_init_trampoline (MonoVTable *vtable)
300 ji = create_specific_trampoline (vtable, MONO_TRAMPOLINE_CLASS_INIT, vtable->domain);
301 code = ji->code_start;
308 * This method is only called when running in the Mono Debugger.
311 mono_debugger_create_notification_function (gpointer *notification_address)
315 ptr = buf = mono_global_codeman_reserve (16);
316 if (notification_address)
317 *notification_address = buf;
319 g_assert_not_reached ();