2 * tramp-ia64.c: JIT trampoline code for ia64
5 * Zoltan Varga (vargaz@gmail.com)
7 * (C) 2001 Ximian, Inc.
13 #include <mono/metadata/appdomain.h>
14 #include <mono/metadata/marshal.h>
15 #include <mono/metadata/tabledefs.h>
16 #include <mono/arch/ia64/ia64-codegen.h>
17 #include <mono/metadata/mono-debug-debugger.h>
20 #include "mini-ia64.h"
22 #define NOT_IMPLEMENTED g_assert_not_reached ()
24 #define GP_SCRATCH_REG 31
25 #define GP_SCRATCH_REG2 30
28 * mono_arch_get_unbox_trampoline:
30 * @addr: pointer to native code for @m
32 * when value type methods are called through the vtable we need to unbox the
33 * this argument. This method returns a pointer to a trampoline which does
34 * unboxing before calling the method
37 mono_arch_get_unbox_trampoline (MonoMethod *m, gpointer addr)
40 gpointer func_addr, func_gp;
41 Ia64CodegenState code;
43 MonoDomain *domain = mono_domain_get ();
45 /* FIXME: Optimize this */
47 if (!mono_method_signature (m)->ret->byref && MONO_TYPE_ISSTRUCT (mono_method_signature (m)->ret))
50 func_addr = ((gpointer*)addr) [0];
51 func_gp = ((gpointer*)addr) [1];
53 mono_domain_lock (domain);
54 buf = mono_code_manager_reserve (domain->code_mp, 256);
55 mono_domain_unlock (domain);
57 /* Since the this reg is a stacked register, its a bit hard to access it */
58 ia64_codegen_init (code, buf);
59 ia64_alloc (code, 40, 8, 1, 0, 0);
60 ia64_adds_imm (code, 32 + this_reg, sizeof (MonoObject), 32 + this_reg);
61 ia64_mov_to_ar_i (code, IA64_PFS, 40);
62 ia64_movl (code, GP_SCRATCH_REG, func_addr);
63 ia64_mov_to_br (code, IA64_B6, GP_SCRATCH_REG);
64 ia64_br_cond_reg (code, IA64_B6);
65 ia64_codegen_close (code);
67 g_assert (code.buf - buf < 256);
71 gpointer *desc = g_malloc0 (sizeof (gpointer) * 2);
79 mono_arch_patch_callsite (guint8 *code, guint8 *addr)
81 guint8 *callsite_begin;
82 guint64 *callsite = (guint64*)(gpointer)(code - 16);
83 guint64 instructions [3];
86 gpointer func = ((gpointer*)(gpointer)addr)[0];
88 while ((ia64_bundle_template (callsite) != IA64_TEMPLATE_MLX) &&
89 (ia64_bundle_template (callsite) != IA64_TEMPLATE_MLXS))
91 callsite_begin = (guint8*)callsite;
93 /* Patch the code generated by emit_call */
95 instructions [0] = ia64_bundle_ins1 (callsite);
96 instructions [1] = ia64_bundle_ins2 (callsite);
97 instructions [2] = ia64_bundle_ins3 (callsite);
99 ia64_codegen_init (gen, (guint8*)buf);
100 ia64_movl (gen, GP_SCRATCH_REG, func);
101 instructions [1] = gen.instructions [0];
102 instructions [2] = gen.instructions [1];
104 ia64_codegen_init (gen, (guint8*)buf);
105 ia64_emit_bundle_template (&gen, ia64_bundle_template (callsite), instructions [0], instructions [1], instructions [2]);
106 ia64_codegen_close (gen);
108 /* This might not be safe, but not all itanium processors support st16 */
109 callsite [0] = buf [0];
110 callsite [1] = buf [1];
112 mono_arch_flush_icache (callsite_begin, code - callsite_begin);
116 mono_arch_nullify_class_init_trampoline (guint8 *code, gssize *regs)
118 guint8 *callsite_begin;
119 guint64 *callsite = (guint64*)(gpointer)(code - 16);
120 guint64 instructions [3];
122 Ia64CodegenState gen;
124 while ((ia64_bundle_template (callsite) != IA64_TEMPLATE_MLX) &&
125 (ia64_bundle_template (callsite) != IA64_TEMPLATE_MLXS))
127 callsite_begin = (guint8*)callsite;
129 /* Replace the code generated by emit_call with a sets of nops */
131 /* The first bundle might have other instructions in it */
132 instructions [0] = ia64_bundle_ins1 (callsite);
133 instructions [1] = IA64_NOP_X;
134 instructions [2] = IA64_NOP_X;
136 ia64_codegen_init (gen, (guint8*)buf);
137 ia64_emit_bundle_template (&gen, ia64_bundle_template (callsite), instructions [0], instructions [1], instructions [2]);
138 ia64_codegen_close (gen);
140 /* This might not be safe, but not all itanium processors support st16 */
141 callsite [0] = buf [0];
142 callsite [1] = buf [1];
146 /* The other bundles can be full replaced with nops */
148 ia64_codegen_init (gen, (guint8*)buf);
149 ia64_emit_bundle_template (&gen, IA64_TEMPLATE_MII, IA64_NOP_M, IA64_NOP_I, IA64_NOP_I);
150 ia64_codegen_close (gen);
152 while ((guint8*)callsite < code) {
153 callsite [0] = buf [0];
154 callsite [1] = buf [1];
158 mono_arch_flush_icache (callsite_begin, code - callsite_begin);
162 mono_arch_patch_delegate_trampoline (guint8 *code, guint8 *tramp, gssize *regs, guint8 *addr)
165 * This is called by the code generated by OP_CALL_REG:
170 * br.call.sptk.few b0=b6
173 /* We patch the function descriptor instead of delegate->method_ptr */
174 //g_assert (((gpointer*)(regs [8] - 8))[0] == tramp);
175 ((gpointer*)(regs [8] - 8))[0] = mono_get_addr_from_ftnptr (addr);
176 ((gpointer*)(regs [8] - 8))[1] = NULL;
180 mono_arch_create_trampoline_code (MonoTrampolineType tramp_type)
183 int i, offset, saved_regs_offset, saved_fpregs_offset, last_offset, framesize;
184 int in0, local0, out0, l0, l1, l2, l3, l4, l5, l6, l7, l8, o0, o1, o2, o3;
186 Ia64CodegenState code;
188 unw_dyn_region_info_t *r_pro;
191 * Since jump trampolines are not patched, this trampoline is executed every
192 * time a call is made to a jump trampoline. So we try to keep things faster
195 if (tramp_type == MONO_TRAMPOLINE_JUMP)
200 buf = mono_global_codeman_reserve (2048);
202 ia64_codegen_init (code, buf);
204 /* FIXME: Save/restore lmf */
206 /* Stacked Registers */
215 l5 = 45; /* saved ar.pfs */
218 l8 = 48; /* saved sp */
219 o0 = out0 + 0; /* regs */
220 o1 = out0 + 1; /* code */
221 o2 = out0 + 2; /* arg */
222 o3 = out0 + 3; /* tramp */
224 framesize = (128 * 8) + 1024;
225 framesize = (framesize + (MONO_ARCH_FRAME_ALIGNMENT - 1)) & ~ (MONO_ARCH_FRAME_ALIGNMENT - 1);
228 * Allocate a new register+memory stack frame.
229 * 8 input registers (the max used by the ABI)
231 * 4 output (number of parameters passed to trampoline)
233 ia64_unw_save_reg (code, UNW_IA64_AR_PFS, UNW_IA64_GR + l5);
234 ia64_alloc (code, l5, local0 - in0, out0 - local0, 4, 0);
235 ia64_unw_save_reg (code, UNW_IA64_SP, UNW_IA64_GR + l8);
236 ia64_mov (code, l8, IA64_SP);
237 ia64_adds_imm (code, IA64_SP, (-framesize), IA64_SP);
239 offset = 16; /* scratch area */
241 /* Save the argument received from the specific trampoline */
242 ia64_mov (code, l6, GP_SCRATCH_REG);
244 /* Save the calling address */
245 ia64_unw_save_reg (code, UNW_IA64_RP, UNW_IA64_GR + local0 + 7);
246 ia64_mov_from_br (code, l7, IA64_B0);
248 /* Create unwind info for the prolog */
249 ia64_begin_bundle (code);
250 r_pro = mono_ia64_create_unwind_region (&code);
253 /* Not needed for jump trampolines */
254 if (tramp_type != MONO_TRAMPOLINE_JUMP) {
255 saved_regs_offset = offset;
258 * Only the registers which are needed for computing vtable slots need
262 for (i = 0; i < 64; ++i)
263 if ((1 << i) & MONO_ARCH_CALLEE_REGS) {
264 if (last_offset != i * 8)
265 ia64_adds_imm (code, l1, saved_regs_offset + (i * 8), IA64_SP);
266 ia64_st8_spill_inc_imm_hint (code, l1, i, 8, 0);
267 last_offset = (i + 1) * 8;
271 /* Save fp registers */
272 saved_fpregs_offset = offset;
274 ia64_adds_imm (code, l1, saved_fpregs_offset, IA64_SP);
275 for (i = 0; i < 8; ++i)
276 ia64_stfd_inc_imm_hint (code, l1, i + 8, 8, 0);
278 g_assert (offset < framesize);
280 /* Arg1 is the pointer to the saved registers */
281 ia64_adds_imm (code, o0, saved_regs_offset, IA64_SP);
283 /* Arg2 is the address of the calling code */
285 ia64_mov (code, o1, l7);
287 ia64_mov (code, o1, 0);
289 /* Arg3 is the method/vtable ptr */
290 ia64_mov (code, o2, l6);
292 /* Arg4 is the trampoline address */
294 ia64_mov (code, o3, 0);
296 if (tramp_type == MONO_TRAMPOLINE_CLASS_INIT)
297 tramp = (guint8*)mono_class_init_trampoline;
298 else if (tramp_type == MONO_TRAMPOLINE_AOT)
299 tramp = (guint8*)mono_aot_trampoline;
300 else if (tramp_type == MONO_TRAMPOLINE_DELEGATE)
301 tramp = (guint8*)mono_delegate_trampoline;
303 tramp = (guint8*)mono_magic_trampoline;
305 /* Call the trampoline using an indirect call */
306 ia64_movl (code, l0, tramp);
307 ia64_ld8_inc_imm (code, l1, l0, 8);
308 ia64_mov_to_br (code, IA64_B6, l1);
309 ia64_ld8 (code, IA64_GP, l0);
310 ia64_br_call_reg (code, 0, IA64_B6);
312 /* Restore fp regs */
313 ia64_adds_imm (code, l1, saved_fpregs_offset, IA64_SP);
314 for (i = 0; i < 8; ++i)
315 ia64_ldfd_inc_imm (code, i + 8, l1, 8);
317 /* FIXME: Handle NATs in fp regs / scratch regs */
319 if (tramp_type != MONO_TRAMPOLINE_CLASS_INIT) {
320 /* Load method address from function descriptor */
321 ia64_ld8 (code, l0, IA64_R8);
322 ia64_mov_to_br (code, IA64_B6, l0);
325 /* Clean up register/memory stack frame */
326 ia64_adds_imm (code, IA64_SP, framesize, IA64_SP);
327 ia64_mov_to_ar_i (code, IA64_PFS, l5);
329 if (tramp_type == MONO_TRAMPOLINE_CLASS_INIT) {
330 ia64_mov_ret_to_br (code, IA64_B0, l7);
331 ia64_br_ret_reg (code, IA64_B0);
334 /* Call the compiled method */
335 ia64_mov_to_br (code, IA64_B0, l7);
336 ia64_br_cond_reg (code, IA64_B6);
339 ia64_codegen_close (code);
341 g_assert ((code.buf - buf) <= 2048);
343 /* FIXME: emit unwind info for epilog */
344 di = g_malloc0 (sizeof (unw_dyn_info_t));
345 di->start_ip = (unw_word_t) buf;
346 di->end_ip = (unw_word_t) code.buf;
348 di->format = UNW_INFO_FORMAT_DYNAMIC;
349 di->u.pi.name_ptr = (unw_word_t)"ia64_generic_trampoline";
350 di->u.pi.regions = r_pro;
352 _U_dyn_register (di);
354 mono_arch_flush_icache (buf, code.buf - buf);
359 #define TRAMPOLINE_SIZE 128
362 mono_arch_create_specific_trampoline (gpointer arg1, MonoTrampolineType tramp_type, MonoDomain *domain, guint32 *code_len)
366 Ia64CodegenState code;
368 tramp = mono_get_trampoline_code (tramp_type);
370 mono_domain_lock (domain);
371 buf = mono_code_manager_reserve (domain->code_mp, TRAMPOLINE_SIZE);
372 mono_domain_unlock (domain);
374 /* FIXME: Optimize this */
376 ia64_codegen_init (code, buf);
378 ia64_movl (code, GP_SCRATCH_REG, arg1);
380 ia64_begin_bundle (code);
381 disp = (tramp - code.buf) >> 4;
382 if (ia64_is_imm21 (disp)) {
383 ia64_br_cond (code, disp);
386 ia64_movl (code, GP_SCRATCH_REG2, tramp);
387 ia64_mov_to_br (code, IA64_B6, GP_SCRATCH_REG2);
388 ia64_br_cond_reg (code, IA64_B6);
391 ia64_codegen_close (code);
393 g_assert (code.buf - buf <= TRAMPOLINE_SIZE);
395 mono_arch_flush_icache (buf, code.buf - buf);
398 *code_len = code.buf - buf;
404 mono_arch_invalidate_method (MonoJitInfo *ji, void *func, gpointer func_arg)
410 mono_debugger_create_notification_function (gpointer *notification_address)