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>
20 #include "mini-sparc.h"
23 * mono_arch_get_unbox_trampoline:
25 * @addr: pointer to native code for @m
27 * when value type methods are called through the vtable we need to unbox the
28 * this argument. This method returns a pointer to a trampoline which does
29 * unboxing before calling the method
32 mono_arch_get_unbox_trampoline (MonoMethod *m, gpointer addr)
35 int this_pos = 4, reg;
37 if (!mono_method_signature (m)->ret->byref && MONO_TYPE_ISSTRUCT (mono_method_signature (m)->ret))
40 start = code = mono_global_codeman_reserve (36);
42 /* This executes in the context of the caller, hence o0 */
43 sparc_add_imm (code, 0, sparc_o0, sizeof (MonoObject), sparc_o0);
49 sparc_set (code, addr, reg);
50 sparc_jmpl (code, reg, sparc_g0, sparc_g0);
53 g_assert ((code - start) <= 36);
55 mono_arch_flush_icache (start, code - start);
61 mono_arch_patch_callsite (guint8 *method_start, guint8 *code, guint8 *addr)
63 if (sparc_inst_op (*(guint32*)code) == 0x1) {
64 sparc_call_simple (code, (guint8*)addr - (guint8*)code);
69 mono_arch_patch_plt_entry (guint8 *code, guint8 *addr)
71 g_assert_not_reached ();
75 mono_arch_nullify_class_init_trampoline (guint8 *code, gssize *regs)
77 /* Patch calling code */
82 mono_arch_nullify_plt_entry (guint8 *code)
84 g_assert_not_reached ();
87 #define ALIGN_TO(val,align) (((val) + ((align) - 1)) & ~((align) - 1))
90 mono_arch_create_trampoline_code (MonoTrampolineType tramp_type)
92 guint8 *buf, *code, *tramp_addr;
93 guint32 lmf_offset, regs_offset, method_reg, i;
96 if (tramp_type == MONO_TRAMPOLINE_JUMP)
101 code = buf = mono_global_codeman_reserve (1024);
103 sparc_save_imm (code, sparc_sp, -1608, sparc_sp);
106 method_reg = sparc_g4;
108 method_reg = sparc_g1;
111 regs_offset = MONO_SPARC_STACK_BIAS + 1000;
113 /* Save r1 needed by the IMT code */
114 sparc_sti_imm (code, sparc_g1, sparc_sp, regs_offset + (sparc_g1 * sizeof (gpointer)));
117 * sparc_g5 contains the return address, the trampoline argument is stored in the
118 * instruction stream after the call.
120 sparc_ld_imm (code, sparc_g5, 8, method_reg);
123 /* Save fp regs since they are not preserved by calls */
124 for (i = 0; i < 16; i ++)
125 sparc_stdf_imm (code, sparc_f0 + (i * 2), sparc_sp, MONO_SPARC_STACK_BIAS + 320 + (i * 8));
128 /* We receive the method address in %r1, so save it here */
129 sparc_sti_imm (code, method_reg, sparc_sp, MONO_SPARC_STACK_BIAS + 200);
131 /* Save lmf since compilation can raise exceptions */
132 lmf_offset = MONO_SPARC_STACK_BIAS - sizeof (MonoLMF);
134 /* Save the data for the parent (managed) frame */
137 sparc_sti_imm (code, sparc_i7, sparc_fp, lmf_offset + G_STRUCT_OFFSET (MonoLMF, ip));
139 sparc_sti_imm (code, sparc_fp, sparc_fp, lmf_offset + G_STRUCT_OFFSET (MonoLMF, sp));
141 /* Load previous fp from the saved register window */
143 sparc_ldi_imm (code, sparc_fp, MONO_SPARC_STACK_BIAS + (sparc_i6 - 16) * sizeof (gpointer), sparc_o7);
144 sparc_sti_imm (code, sparc_o7, sparc_fp, lmf_offset + G_STRUCT_OFFSET (MonoLMF, ebp));
146 sparc_sti_imm (code, method_reg, sparc_fp, lmf_offset + G_STRUCT_OFFSET (MonoLMF, method));
148 sparc_set (code, mono_get_lmf_addr, sparc_o7);
149 sparc_jmpl (code, sparc_o7, sparc_g0, sparc_o7);
152 code = mono_sparc_emit_save_lmf (code, lmf_offset);
155 /* Load all registers of the caller into a table inside this frame */
156 /* first the out registers */
157 for (i = 0; i < 8; ++i)
158 sparc_sti_imm (code, sparc_i0 + i, sparc_sp, regs_offset + ((sparc_o0 + i) * sizeof (gpointer)));
159 /* then the in+local registers */
160 for (i = 0; i < 16; i ++) {
161 sparc_ldi_imm (code, sparc_fp, MONO_SPARC_STACK_BIAS + (i * sizeof (gpointer)), sparc_o7);
162 sparc_sti_imm (code, sparc_o7, sparc_sp, regs_offset + ((sparc_l0 + i) * sizeof (gpointer)));
166 tramp_addr = mono_get_trampoline_func (tramp_type);
167 sparc_ldi_imm (code, sparc_sp, MONO_SPARC_STACK_BIAS + 200, sparc_o2);
168 /* pass address of register table as third argument */
169 sparc_add_imm (code, FALSE, sparc_sp, regs_offset, sparc_o0);
170 sparc_set (code, tramp_addr, sparc_o7);
171 /* set %o1 to caller address */
173 sparc_mov_reg_reg (code, sparc_i7, sparc_o1);
175 sparc_set (code, 0, sparc_o1);
176 sparc_set (code, 0, sparc_o3);
177 sparc_jmpl (code, sparc_o7, sparc_g0, sparc_o7);
181 sparc_sti_imm (code, sparc_o0, sparc_sp, MONO_SPARC_STACK_BIAS + 304);
183 /* Check for thread interruption */
184 sparc_set (code, (guint8*)mono_thread_interruption_checkpoint, sparc_o7);
185 sparc_jmpl (code, sparc_o7, sparc_g0, sparc_o7);
189 code = mono_sparc_emit_restore_lmf (code, lmf_offset);
192 sparc_ldi_imm (code, sparc_sp, MONO_SPARC_STACK_BIAS + 304, sparc_o0);
196 for (i = 0; i < 16; i ++)
197 sparc_lddf_imm (code, sparc_sp, MONO_SPARC_STACK_BIAS + 320 + (i * 8), sparc_f0 + (i * 2));
200 if (tramp_type == MONO_TRAMPOLINE_CLASS_INIT)
203 sparc_jmpl (code, sparc_o0, sparc_g0, sparc_g0);
205 /* restore previous frame in delay slot */
206 sparc_restore_simple (code);
212 sparc_save_imm (code, sparc_sp, -608, sparc_sp);
214 sparc_call_simple (code, 16);
216 sparc_rett_simple (code);
219 sparc_save_imm (code, sparc_sp, -608, sparc_sp);
221 tramp_addr = &sparc_magic_trampoline;
222 sparc_call_simple (code, tramp_addr - code);
224 sparc_rett_simple (code);
229 g_assert ((code - buf) <= 512);
231 mono_arch_flush_icache (buf, code - buf);
236 #define TRAMPOLINE_SIZE (SPARC_SET_MAX_SIZE + 3)
239 mono_arch_create_specific_trampoline (gpointer arg1, MonoTrampolineType tramp_type, MonoDomain *domain, guint32 *code_len)
241 guint32 *code, *buf, *tramp;
243 tramp = mono_get_trampoline_code (tramp_type);
245 mono_domain_lock (domain);
246 code = buf = mono_code_manager_reserve (domain->code_mp, TRAMPOLINE_SIZE * 4);
247 mono_domain_unlock (domain);
249 /* We have to use g5 here because there is no other free register */
250 sparc_set (code, tramp, sparc_g5);
251 sparc_jmpl (code, sparc_g5, sparc_g0, sparc_g5);
254 g_assert_not_reached ();
256 *code = (guint32)arg1;
260 g_assert ((code - buf) <= TRAMPOLINE_SIZE);
263 *code_len = (code - buf) * 4;
265 mono_jit_stats.method_trampolines++;
267 mono_arch_flush_icache ((guint8*)buf, (code - buf) * 4);
273 * This method is only called when running in the Mono Debugger.
276 mono_debugger_create_notification_function (void)
280 ptr = buf = mono_global_codeman_reserve (16);
282 g_assert_not_reached ();
288 mono_arch_create_rgctx_lazy_fetch_trampoline (guint32 encoded_offset)
290 /* FIXME: implement! */
291 g_assert_not_reached ();
296 mono_arch_get_rgctx_lazy_fetch_offset (gpointer *regs)
298 /* FIXME: implement! */
299 g_assert_not_reached ();