3 * JIT trampoline code for amd64
6 * Dietmar Maurer (dietmar@ximian.com)
7 * Zoltan Varga (vargaz@gmail.com)
8 * Johan Lorensson (lateralusx.github@gmail.com)
10 * (C) 2001 Ximian, Inc.
11 * Copyright 2003-2011 Novell, Inc (http://www.novell.com)
12 * Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
13 * Licensed under the MIT license. See LICENSE file in the project root for full license information.
19 #include <mono/metadata/abi-details.h>
20 #include <mono/metadata/appdomain.h>
21 #include <mono/metadata/marshal.h>
22 #include <mono/metadata/tabledefs.h>
23 #include <mono/metadata/profiler-private.h>
24 #include <mono/metadata/gc-internals.h>
25 #include <mono/arch/amd64/amd64-codegen.h>
27 #include <mono/utils/memcheck.h>
30 #include "mini-amd64.h"
31 #include "debugger-agent.h"
33 #ifdef ENABLE_INTERPRETER
34 #include "interp/interp.h"
37 #define ALIGN_TO(val,align) ((((guint64)val) + ((align) - 1)) & ~((align) - 1))
39 #define IS_REX(inst) (((inst) >= 0x40) && ((inst) <= 0x4f))
43 * mono_arch_get_unbox_trampoline:
45 * @addr: pointer to native code for @m
47 * when value type methods are called through the vtable we need to unbox the
48 * this argument. This method returns a pointer to a trampoline which does
49 * unboxing before calling the method
52 mono_arch_get_unbox_trampoline (MonoMethod *m, gpointer addr)
56 int this_reg, size = 20;
58 MonoDomain *domain = mono_domain_get ();
60 this_reg = mono_arch_get_this_arg_reg (NULL);
62 start = code = (guint8 *)mono_domain_code_reserve (domain, size + MONO_TRAMPOLINE_UNWINDINFO_SIZE(0));
64 unwind_ops = mono_arch_get_cie_program ();
66 amd64_alu_reg_imm (code, X86_ADD, this_reg, sizeof (MonoObject));
67 /* FIXME: Optimize this */
68 amd64_mov_reg_imm (code, AMD64_RAX, addr);
69 amd64_jump_reg (code, AMD64_RAX);
70 g_assert ((code - start) < size);
71 g_assert_checked (mono_arch_unwindinfo_validate_size (unwind_ops, MONO_TRAMPOLINE_UNWINDINFO_SIZE(0)));
73 mono_arch_flush_icache (start, code - start);
74 MONO_PROFILER_RAISE (jit_code_buffer, (start, code - start, MONO_PROFILER_CODE_BUFFER_UNBOX_TRAMPOLINE, m));
76 mono_tramp_info_register (mono_tramp_info_create (NULL, start, code - start, NULL, unwind_ops), domain);
82 * mono_arch_get_static_rgctx_trampoline:
84 * Create a trampoline which sets RGCTX_REG to ARG, then jumps to ADDR.
87 mono_arch_get_static_rgctx_trampoline (gpointer arg, gpointer addr)
93 MonoDomain *domain = mono_domain_get ();
95 #ifdef MONO_ARCH_NOMAP32BIT
98 /* AOTed code could still have a non-32 bit address */
99 if ((((guint64)addr) >> 32) == 0)
105 start = code = (guint8 *)mono_domain_code_reserve (domain, buf_len + MONO_TRAMPOLINE_UNWINDINFO_SIZE(0));
107 unwind_ops = mono_arch_get_cie_program ();
109 amd64_mov_reg_imm (code, MONO_ARCH_RGCTX_REG, arg);
110 amd64_jump_code (code, addr);
111 g_assert ((code - start) < buf_len);
112 g_assert_checked (mono_arch_unwindinfo_validate_size (unwind_ops, MONO_TRAMPOLINE_UNWINDINFO_SIZE(0)));
114 mono_arch_flush_icache (start, code - start);
115 MONO_PROFILER_RAISE (jit_code_buffer, (start, code - start, MONO_PROFILER_CODE_BUFFER_GENERICS_TRAMPOLINE, NULL));
117 mono_tramp_info_register (mono_tramp_info_create (NULL, start, code - start, NULL, unwind_ops), domain);
121 #endif /* !DISABLE_JIT */
124 // Workaround lack of Valgrind support for 64-bit Windows
125 #define VALGRIND_DISCARD_TRANSLATIONS(...)
129 * mono_arch_patch_callsite:
131 * Patch the callsite whose address is given by ORIG_CODE so it calls ADDR. ORIG_CODE
132 * points to the pc right after the call.
135 mono_arch_patch_callsite (guint8 *method_start, guint8 *orig_code, guint8 *addr)
139 gboolean can_write = mono_breakpoint_clean_code (method_start, orig_code, 14, buf, sizeof (buf));
143 /* mov 64-bit imm into r11 (followed by call reg?) or direct call*/
144 if (((code [-13] == 0x49) && (code [-12] == 0xbb)) || (code [-5] == 0xe8)) {
145 if (code [-5] != 0xe8) {
147 InterlockedExchangePointer ((gpointer*)(orig_code - 11), addr);
148 VALGRIND_DISCARD_TRANSLATIONS (orig_code - 11, sizeof (gpointer));
151 gboolean disp_32bit = ((((gint64)addr - (gint64)orig_code)) < (1 << 30)) && ((((gint64)addr - (gint64)orig_code)) > -(1 << 30));
153 if ((((guint64)(addr)) >> 32) != 0 && !disp_32bit) {
155 * This might happen with LLVM or when calling AOTed code. Create a thunk.
157 guint8 *thunk_start, *thunk_code;
159 thunk_start = thunk_code = (guint8 *)mono_domain_code_reserve (mono_domain_get (), 32);
160 amd64_jump_membase (thunk_code, AMD64_RIP, 0);
161 *(guint64*)thunk_code = (guint64)addr;
163 g_assert ((((guint64)(addr)) >> 32) == 0);
164 mono_arch_flush_icache (thunk_start, thunk_code - thunk_start);
165 MONO_PROFILER_RAISE (jit_code_buffer, (thunk_start, thunk_code - thunk_start, MONO_PROFILER_CODE_BUFFER_HELPER, NULL));
168 InterlockedExchange ((gint32*)(orig_code - 4), ((gint64)addr - (gint64)orig_code));
169 VALGRIND_DISCARD_TRANSLATIONS (orig_code - 5, 4);
173 else if ((code [-7] == 0x41) && (code [-6] == 0xff) && (code [-5] == 0x15)) {
174 /* call *<OFFSET>(%rip) */
175 gpointer *got_entry = (gpointer*)((guint8*)orig_code + (*(guint32*)(orig_code - 4)));
177 InterlockedExchangePointer (got_entry, addr);
178 VALGRIND_DISCARD_TRANSLATIONS (orig_code - 5, sizeof (gpointer));
185 mono_arch_create_llvm_native_thunk (MonoDomain *domain, guint8 *addr)
188 * The caller is LLVM code and the call displacement might exceed 32 bits. We can't determine the caller address, so
189 * we add a thunk every time.
190 * Since the caller is also allocated using the domain code manager, hopefully the displacement will fit into 32 bits.
191 * FIXME: Avoid this if possible if !MONO_ARCH_NOMAP32BIT and ADDR is 32 bits.
193 guint8 *thunk_start, *thunk_code;
195 thunk_start = thunk_code = (guint8 *)mono_domain_code_reserve (mono_domain_get (), 32);
196 amd64_jump_membase (thunk_code, AMD64_RIP, 0);
197 *(guint64*)thunk_code = (guint64)addr;
199 mono_arch_flush_icache (thunk_start, thunk_code - thunk_start);
200 MONO_PROFILER_RAISE (jit_code_buffer, (thunk_start, thunk_code - thunk_start, MONO_PROFILER_CODE_BUFFER_HELPER, NULL));
203 #endif /* !DISABLE_JIT */
206 mono_arch_patch_plt_entry (guint8 *code, gpointer *got, mgreg_t *regs, guint8 *addr)
209 gpointer *plt_jump_table_entry;
211 /* A PLT entry: jmp *<DISP>(%rip) */
212 g_assert (code [0] == 0xff);
213 g_assert (code [1] == 0x25);
215 disp = *(gint32*)(code + 2);
217 plt_jump_table_entry = (gpointer*)(code + 6 + disp);
219 InterlockedExchangePointer (plt_jump_table_entry, addr);
224 stack_unaligned (MonoTrampolineType tramp_type)
226 printf ("%d\n", tramp_type);
227 g_assert_not_reached ();
231 mono_arch_create_generic_trampoline (MonoTrampolineType tramp_type, MonoTrampInfo **info, gboolean aot)
234 guint8 *buf, *code, *tramp, *br [2], *r11_save_code, *after_r11_save_code, *br_ex_check;
235 int i, lmf_offset, offset, res_offset, arg_offset, rax_offset, ex_offset, tramp_offset, ctx_offset, saved_regs_offset;
236 int r11_save_offset, saved_fpregs_offset, rbp_offset, framesize, orig_rsp_to_rbp_offset, cfa_offset;
238 GSList *unwind_ops = NULL;
239 MonoJumpInfo *ji = NULL;
240 const guint kMaxCodeSize = 630;
242 if (tramp_type == MONO_TRAMPOLINE_JUMP || tramp_type == MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD)
247 code = buf = (guint8 *)mono_global_codeman_reserve (kMaxCodeSize + MONO_MAX_TRAMPOLINE_UNWINDINFO_SIZE);
249 /* Compute stack frame size and offsets */
251 rbp_offset = -offset;
253 offset += sizeof(mgreg_t);
254 rax_offset = -offset;
256 offset += sizeof(mgreg_t);
259 offset += sizeof(mgreg_t);
260 r11_save_offset = -offset;
262 offset += sizeof(mgreg_t);
263 tramp_offset = -offset;
265 offset += sizeof(gpointer);
266 arg_offset = -offset;
268 offset += sizeof(mgreg_t);
269 res_offset = -offset;
271 offset += sizeof (MonoContext);
272 ctx_offset = -offset;
273 saved_regs_offset = ctx_offset + MONO_STRUCT_OFFSET (MonoContext, gregs);
274 saved_fpregs_offset = ctx_offset + MONO_STRUCT_OFFSET (MonoContext, fregs);
276 offset += sizeof (MonoLMFTramp);
277 lmf_offset = -offset;
280 /* Reserve space where the callee can save the argument registers */
281 offset += 4 * sizeof (mgreg_t);
284 framesize = ALIGN_TO (offset, MONO_ARCH_FRAME_ALIGNMENT);
286 // CFA = sp + 16 (the trampoline address is on the stack)
288 mono_add_unwind_op_def_cfa (unwind_ops, code, buf, AMD64_RSP, 16);
289 // IP saved at CFA - 8
290 mono_add_unwind_op_offset (unwind_ops, code, buf, AMD64_RIP, -8);
292 orig_rsp_to_rbp_offset = 0;
293 r11_save_code = code;
294 /* Reserve space for the mov_membase_reg to save R11 */
296 after_r11_save_code = code;
298 /* Pop the return address off the stack */
299 amd64_pop_reg (code, AMD64_R11);
300 orig_rsp_to_rbp_offset += sizeof(mgreg_t);
302 cfa_offset -= sizeof(mgreg_t);
303 mono_add_unwind_op_def_cfa_offset (unwind_ops, code, buf, cfa_offset);
306 * Allocate a new stack frame
308 amd64_push_reg (code, AMD64_RBP);
309 cfa_offset += sizeof(mgreg_t);
310 mono_add_unwind_op_def_cfa_offset (unwind_ops, code, buf, cfa_offset);
311 mono_add_unwind_op_offset (unwind_ops, code, buf, AMD64_RBP, - cfa_offset);
313 orig_rsp_to_rbp_offset -= sizeof(mgreg_t);
314 amd64_mov_reg_reg (code, AMD64_RBP, AMD64_RSP, sizeof(mgreg_t));
315 mono_add_unwind_op_def_cfa_reg (unwind_ops, code, buf, AMD64_RBP);
316 mono_add_unwind_op_fp_alloc (unwind_ops, code, buf, AMD64_RBP, 0);
317 amd64_alu_reg_imm (code, X86_SUB, AMD64_RSP, framesize);
319 /* Compute the trampoline address from the return address */
321 /* 7 = length of call *<offset>(rip) */
322 amd64_alu_reg_imm (code, X86_SUB, AMD64_R11, 7);
324 /* 5 = length of amd64_call_membase () */
325 amd64_alu_reg_imm (code, X86_SUB, AMD64_R11, 5);
327 amd64_mov_membase_reg (code, AMD64_RBP, tramp_offset, AMD64_R11, sizeof(gpointer));
329 /* Save all registers */
330 for (i = 0; i < AMD64_NREG; ++i) {
331 if (i == AMD64_RBP) {
332 /* RAX is already saved */
333 amd64_mov_reg_membase (code, AMD64_RAX, AMD64_RBP, rbp_offset, sizeof(mgreg_t));
334 amd64_mov_membase_reg (code, AMD64_RBP, saved_regs_offset + (i * sizeof(mgreg_t)), AMD64_RAX, sizeof(mgreg_t));
335 } else if (i == AMD64_RIP) {
337 amd64_mov_reg_membase (code, AMD64_R11, AMD64_RBP, 8, sizeof(gpointer));
339 amd64_mov_reg_imm (code, AMD64_R11, 0);
340 amd64_mov_membase_reg (code, AMD64_RBP, saved_regs_offset + (i * sizeof(mgreg_t)), AMD64_R11, sizeof(mgreg_t));
341 } else if (i == AMD64_RSP) {
342 amd64_mov_reg_reg (code, AMD64_R11, AMD64_RSP, sizeof(mgreg_t));
343 amd64_alu_reg_imm (code, X86_ADD, AMD64_R11, framesize + 16);
344 amd64_mov_membase_reg (code, AMD64_RBP, saved_regs_offset + (i * sizeof(mgreg_t)), AMD64_R11, sizeof(mgreg_t));
345 } else if (i != AMD64_R11) {
346 amd64_mov_membase_reg (code, AMD64_RBP, saved_regs_offset + (i * sizeof(mgreg_t)), i, sizeof(mgreg_t));
348 /* We have to save R11 right at the start of
349 the trampoline code because it's used as a
351 /* This happens before the frame is set up, so it goes into the redzone */
352 amd64_mov_membase_reg (r11_save_code, AMD64_RSP, r11_save_offset + orig_rsp_to_rbp_offset, i, sizeof(mgreg_t));
353 g_assert (r11_save_code == after_r11_save_code);
355 /* Copy from the save slot into the register array slot */
356 amd64_mov_reg_membase (code, i, AMD64_RSP, r11_save_offset + orig_rsp_to_rbp_offset, sizeof(mgreg_t));
357 amd64_mov_membase_reg (code, AMD64_RBP, saved_regs_offset + (i * sizeof(mgreg_t)), i, sizeof(mgreg_t));
359 /* cfa = rbp + cfa_offset */
360 mono_add_unwind_op_offset (unwind_ops, code, buf, i, - cfa_offset + saved_regs_offset + (i * sizeof (mgreg_t)));
362 for (i = 0; i < 8; ++i)
363 amd64_movsd_membase_reg (code, AMD64_RBP, saved_fpregs_offset + (i * sizeof(mgreg_t)), i);
365 /* Check that the stack is aligned */
366 amd64_mov_reg_reg (code, AMD64_R11, AMD64_RSP, sizeof (mgreg_t));
367 amd64_alu_reg_imm (code, X86_AND, AMD64_R11, 15);
368 amd64_alu_reg_imm (code, X86_CMP, AMD64_R11, 0);
370 amd64_branch_disp (code, X86_CC_Z, 0, FALSE);
372 amd64_mov_reg_imm (code, AMD64_R11, 0);
373 amd64_mov_reg_membase (code, AMD64_R11, AMD64_R11, 0, 8);
375 amd64_mov_reg_imm (code, MONO_AMD64_ARG_REG1, tramp_type);
376 amd64_mov_reg_imm (code, AMD64_R11, stack_unaligned);
377 amd64_call_reg (code, AMD64_R11);
379 mono_amd64_patch (br [0], code);
380 //amd64_breakpoint (code);
382 if (tramp_type != MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD) {
383 /* Obtain the trampoline argument which is encoded in the instruction stream */
385 /* Load the GOT offset */
386 amd64_mov_reg_membase (code, AMD64_R11, AMD64_RBP, tramp_offset, sizeof(gpointer));
388 * r11 points to a call *<offset>(%rip) instruction, load the
389 * pc-relative offset from the instruction itself.
391 amd64_mov_reg_membase (code, AMD64_RAX, AMD64_R11, 3, 4);
392 /* 7 is the length of the call, 8 is the offset to the next got slot */
393 amd64_alu_reg_imm_size (code, X86_ADD, AMD64_RAX, 7 + sizeof (gpointer), sizeof(gpointer));
394 /* Compute the address of the GOT slot */
395 amd64_alu_reg_reg_size (code, X86_ADD, AMD64_R11, AMD64_RAX, sizeof(gpointer));
397 amd64_mov_reg_membase (code, AMD64_R11, AMD64_R11, 0, sizeof(gpointer));
399 amd64_mov_reg_membase (code, AMD64_R11, AMD64_RBP, tramp_offset, sizeof(gpointer));
400 amd64_mov_reg_membase (code, AMD64_RAX, AMD64_R11, 5, 1);
401 amd64_widen_reg (code, AMD64_RAX, AMD64_RAX, TRUE, FALSE);
402 amd64_alu_reg_imm_size (code, X86_CMP, AMD64_RAX, 4, 1);
404 x86_branch8 (code, X86_CC_NE, 6, FALSE);
405 /* 32 bit immediate */
406 amd64_mov_reg_membase (code, AMD64_R11, AMD64_R11, 6, 4);
408 x86_jump8 (code, 10);
409 /* 64 bit immediate */
410 mono_amd64_patch (br [0], code);
411 amd64_mov_reg_membase (code, AMD64_R11, AMD64_R11, 6, 8);
412 mono_amd64_patch (br [1], code);
414 amd64_mov_membase_reg (code, AMD64_RBP, arg_offset, AMD64_R11, sizeof(gpointer));
416 amd64_mov_reg_membase (code, AMD64_R11, AMD64_RBP, saved_regs_offset + (MONO_AMD64_ARG_REG1 * sizeof(mgreg_t)), sizeof(mgreg_t));
417 amd64_mov_membase_reg (code, AMD64_RBP, arg_offset, AMD64_R11, sizeof(gpointer));
424 amd64_mov_reg_membase (code, AMD64_R11, AMD64_RBP, 8, sizeof(gpointer));
426 amd64_mov_reg_imm (code, AMD64_R11, 0);
427 amd64_mov_membase_reg (code, AMD64_RBP, lmf_offset + MONO_STRUCT_OFFSET (MonoLMF, rip), AMD64_R11, sizeof(mgreg_t));
429 amd64_mov_reg_reg (code, AMD64_R11, AMD64_RSP, sizeof(mgreg_t));
430 amd64_alu_reg_imm (code, X86_ADD, AMD64_R11, framesize + 16);
431 amd64_mov_membase_reg (code, AMD64_RBP, lmf_offset + MONO_STRUCT_OFFSET (MonoLMF, rsp), AMD64_R11, sizeof(mgreg_t));
432 /* Save pointer to context */
433 amd64_lea_membase (code, AMD64_R11, AMD64_RBP, ctx_offset);
434 amd64_mov_membase_reg (code, AMD64_RBP, lmf_offset + MONO_STRUCT_OFFSET (MonoLMFTramp, ctx), AMD64_R11, sizeof(mgreg_t));
437 code = mono_arch_emit_load_aotconst (buf, code, &ji, MONO_PATCH_INFO_JIT_ICALL_ADDR, "mono_get_lmf_addr");
439 amd64_mov_reg_imm (code, AMD64_R11, mono_get_lmf_addr);
441 amd64_call_reg (code, AMD64_R11);
444 amd64_mov_membase_reg (code, AMD64_RBP, lmf_offset + MONO_STRUCT_OFFSET (MonoLMFTramp, lmf_addr), AMD64_RAX, sizeof(gpointer));
445 /* Save previous_lmf */
446 /* Set the lowest bit to signal that this LMF has the ip field set */
447 /* Set the third lowest bit to signal that this is a MonoLMFTramp structure */
448 amd64_mov_reg_membase (code, AMD64_R11, AMD64_RAX, 0, sizeof(gpointer));
449 amd64_alu_reg_imm_size (code, X86_ADD, AMD64_R11, 0x5, sizeof(gpointer));
450 amd64_mov_membase_reg (code, AMD64_RBP, lmf_offset + MONO_STRUCT_OFFSET (MonoLMF, previous_lmf), AMD64_R11, sizeof(gpointer));
452 amd64_lea_membase (code, AMD64_R11, AMD64_RBP, lmf_offset);
453 amd64_mov_membase_reg (code, AMD64_RAX, 0, AMD64_R11, sizeof(gpointer));
457 /* Arg1 is the pointer to the saved registers */
458 amd64_lea_membase (code, AMD64_ARG_REG1, AMD64_RBP, saved_regs_offset);
460 /* Arg2 is the address of the calling code */
462 amd64_mov_reg_membase (code, AMD64_ARG_REG2, AMD64_RBP, 8, sizeof(gpointer));
464 amd64_mov_reg_imm (code, AMD64_ARG_REG2, 0);
466 /* Arg3 is the method/vtable ptr */
467 amd64_mov_reg_membase (code, AMD64_ARG_REG3, AMD64_RBP, arg_offset, sizeof(gpointer));
469 /* Arg4 is the trampoline address */
470 amd64_mov_reg_membase (code, AMD64_ARG_REG4, AMD64_RBP, tramp_offset, sizeof(gpointer));
473 char *icall_name = g_strdup_printf ("trampoline_func_%d", tramp_type);
474 code = mono_arch_emit_load_aotconst (buf, code, &ji, MONO_PATCH_INFO_JIT_ICALL_ADDR, icall_name);
476 tramp = (guint8*)mono_get_trampoline_func (tramp_type);
477 amd64_mov_reg_imm (code, AMD64_R11, tramp);
479 amd64_call_reg (code, AMD64_R11);
480 amd64_mov_membase_reg (code, AMD64_RBP, res_offset, AMD64_RAX, sizeof(mgreg_t));
483 amd64_mov_reg_membase (code, AMD64_RCX, AMD64_RBP, lmf_offset + MONO_STRUCT_OFFSET (MonoLMF, previous_lmf), sizeof(gpointer));
484 amd64_alu_reg_imm_size (code, X86_SUB, AMD64_RCX, 0x5, sizeof(gpointer));
485 amd64_mov_reg_membase (code, AMD64_R11, AMD64_RBP, lmf_offset + MONO_STRUCT_OFFSET (MonoLMFTramp, lmf_addr), sizeof(gpointer));
486 amd64_mov_membase_reg (code, AMD64_R11, 0, AMD64_RCX, sizeof(gpointer));
489 * Save rax to the stack, after the leave instruction, this will become part of
492 amd64_mov_reg_membase (code, AMD64_RAX, AMD64_RBP, res_offset, sizeof(mgreg_t));
493 amd64_mov_membase_reg (code, AMD64_RBP, rax_offset, AMD64_RAX, sizeof(mgreg_t));
495 /* Check for thread interruption */
496 /* This is not perf critical code so no need to check the interrupt flag */
498 * Have to call the _force_ variant, since there could be a protected wrapper on the top of the stack.
501 code = mono_arch_emit_load_aotconst (buf, code, &ji, MONO_PATCH_INFO_JIT_ICALL_ADDR, "mono_thread_force_interruption_checkpoint_noraise");
503 amd64_mov_reg_imm (code, AMD64_R11, (guint8*)mono_thread_force_interruption_checkpoint_noraise);
505 amd64_call_reg (code, AMD64_R11);
507 amd64_test_reg_reg (code, AMD64_RAX, AMD64_RAX);
509 amd64_branch8 (code, X86_CC_Z, -1, 1);
513 * We have an exception we want to throw in the caller's frame, so pop
514 * the trampoline frame and throw from the caller.
517 amd64_lea_membase (code, AMD64_RSP, AMD64_RBP, 0);
518 amd64_pop_reg (code, AMD64_RBP);
519 mono_add_unwind_op_same_value (unwind_ops, code, buf, AMD64_RBP);
523 /* We are in the parent frame, the exception is in rax */
525 * EH is initialized after trampolines, so get the address of the variable
526 * which contains throw_exception, and load it from there.
529 /* Not really a jit icall */
530 code = mono_arch_emit_load_aotconst (buf, code, &ji, MONO_PATCH_INFO_JIT_ICALL_ADDR, "throw_exception_addr");
532 amd64_mov_reg_imm (code, AMD64_R11, (guint8*)mono_get_throw_exception_addr ());
534 amd64_mov_reg_membase (code, AMD64_R11, AMD64_R11, 0, sizeof(gpointer));
535 amd64_mov_reg_reg (code, AMD64_ARG_REG1, AMD64_RAX, sizeof(mgreg_t));
537 * We still have the original return value on the top of the stack, so the
538 * throw trampoline will use that as the throw site.
540 amd64_jump_reg (code, AMD64_R11);
543 mono_amd64_patch (br_ex_check, code);
545 /* Restore argument registers, r10 (imt method/rgxtx)
546 and rax (needed for direct calls to C vararg functions). */
547 for (i = 0; i < AMD64_NREG; ++i)
548 if (AMD64_IS_ARGUMENT_REG (i) || i == AMD64_R10 || i == AMD64_RAX)
549 amd64_mov_reg_membase (code, i, AMD64_RBP, saved_regs_offset + (i * sizeof(mgreg_t)), sizeof(mgreg_t));
550 for (i = 0; i < 8; ++i)
551 amd64_movsd_reg_membase (code, i, AMD64_RBP, saved_fpregs_offset + (i * sizeof(mgreg_t)));
555 amd64_lea_membase (code, AMD64_RSP, AMD64_RBP, 0);
556 amd64_pop_reg (code, AMD64_RBP);
557 mono_add_unwind_op_same_value (unwind_ops, code, buf, AMD64_RBP);
561 cfa_offset -= sizeof (mgreg_t);
562 mono_add_unwind_op_def_cfa (unwind_ops, code, buf, AMD64_RSP, cfa_offset);
564 if (MONO_TRAMPOLINE_TYPE_MUST_RETURN (tramp_type)) {
566 amd64_mov_reg_membase (code, AMD64_RAX, AMD64_RSP, rax_offset - sizeof(mgreg_t), sizeof(mgreg_t));
569 /* call the compiled method using the saved rax */
570 amd64_jump_membase (code, AMD64_RSP, rax_offset - sizeof(mgreg_t));
573 g_assert ((code - buf) <= kMaxCodeSize);
574 g_assert_checked (mono_arch_unwindinfo_validate_size (unwind_ops, MONO_MAX_TRAMPOLINE_UNWINDINFO_SIZE));
576 mono_arch_flush_icache (buf, code - buf);
577 MONO_PROFILER_RAISE (jit_code_buffer, (buf, code - buf, MONO_PROFILER_CODE_BUFFER_HELPER, NULL));
579 tramp_name = mono_get_generic_trampoline_name (tramp_type);
580 *info = mono_tramp_info_create (tramp_name, buf, code - buf, ji, unwind_ops);
587 mono_arch_create_specific_trampoline (gpointer arg1, MonoTrampolineType tramp_type, MonoDomain *domain, guint32 *code_len)
589 guint8 *code, *buf, *tramp;
591 gboolean far_addr = FALSE;
593 tramp = mono_get_trampoline_code (tramp_type);
595 if ((((guint64)arg1) >> 32) == 0)
600 code = buf = (guint8 *)mono_domain_code_reserve_align (domain, size, 1);
602 if (((gint64)tramp - (gint64)code) >> 31 != 0 && ((gint64)tramp - (gint64)code) >> 31 != -1) {
603 #ifndef MONO_ARCH_NOMAP32BIT
604 g_assert_not_reached ();
608 code = buf = (guint8 *)mono_domain_code_reserve_align (domain, size, 1);
612 amd64_mov_reg_imm (code, AMD64_R11, tramp);
613 amd64_call_reg (code, AMD64_R11);
615 amd64_call_code (code, tramp);
617 /* The trampoline code will obtain the argument from the instruction stream */
618 if ((((guint64)arg1) >> 32) == 0) {
620 *(guint32*)(code + 1) = (gint64)arg1;
624 *(guint64*)(code + 1) = (gint64)arg1;
628 g_assert ((code - buf) <= size);
633 mono_arch_flush_icache (buf, size);
634 MONO_PROFILER_RAISE (jit_code_buffer, (buf, code - buf, MONO_PROFILER_CODE_BUFFER_SPECIFIC_TRAMPOLINE, mono_get_generic_trampoline_simple_name (tramp_type)));
640 mono_arch_create_rgctx_lazy_fetch_trampoline (guint32 slot, MonoTrampInfo **info, gboolean aot)
644 guint8 **rgctx_null_jumps;
649 MonoJumpInfo *ji = NULL;
652 mrgctx = MONO_RGCTX_SLOT_IS_MRGCTX (slot);
653 index = MONO_RGCTX_SLOT_INDEX (slot);
655 index += MONO_SIZEOF_METHOD_RUNTIME_GENERIC_CONTEXT / sizeof (gpointer);
656 for (depth = 0; ; ++depth) {
657 int size = mono_class_rgctx_get_array_size (depth, mrgctx);
659 if (index < size - 1)
664 tramp_size = 64 + 8 * depth;
666 code = buf = (guint8 *)mono_global_codeman_reserve (tramp_size + MONO_TRAMPOLINE_UNWINDINFO_SIZE(0));
668 unwind_ops = mono_arch_get_cie_program ();
670 rgctx_null_jumps = (guint8 **)g_malloc (sizeof (guint8*) * (depth + 2));
674 amd64_mov_reg_reg (code, AMD64_RAX, AMD64_ARG_REG1, 8);
676 /* load rgctx ptr from vtable */
677 amd64_mov_reg_membase (code, AMD64_RAX, AMD64_ARG_REG1, MONO_STRUCT_OFFSET (MonoVTable, runtime_generic_context), sizeof(gpointer));
678 /* is the rgctx ptr null? */
679 amd64_test_reg_reg (code, AMD64_RAX, AMD64_RAX);
680 /* if yes, jump to actual trampoline */
681 rgctx_null_jumps [0] = code;
682 amd64_branch8 (code, X86_CC_Z, -1, 1);
685 for (i = 0; i < depth; ++i) {
686 /* load ptr to next array */
687 if (mrgctx && i == 0)
688 amd64_mov_reg_membase (code, AMD64_RAX, AMD64_RAX, MONO_SIZEOF_METHOD_RUNTIME_GENERIC_CONTEXT, sizeof(gpointer));
690 amd64_mov_reg_membase (code, AMD64_RAX, AMD64_RAX, 0, sizeof(gpointer));
691 /* is the ptr null? */
692 amd64_test_reg_reg (code, AMD64_RAX, AMD64_RAX);
693 /* if yes, jump to actual trampoline */
694 rgctx_null_jumps [i + 1] = code;
695 amd64_branch8 (code, X86_CC_Z, -1, 1);
699 amd64_mov_reg_membase (code, AMD64_RAX, AMD64_RAX, sizeof (gpointer) * (index + 1), sizeof(gpointer));
700 /* is the slot null? */
701 amd64_test_reg_reg (code, AMD64_RAX, AMD64_RAX);
702 /* if yes, jump to actual trampoline */
703 rgctx_null_jumps [depth + 1] = code;
704 amd64_branch8 (code, X86_CC_Z, -1, 1);
705 /* otherwise return */
708 for (i = mrgctx ? 1 : 0; i <= depth + 1; ++i)
709 mono_amd64_patch (rgctx_null_jumps [i], code);
711 g_free (rgctx_null_jumps);
713 /* move the rgctx pointer to the VTABLE register */
714 amd64_mov_reg_reg (code, MONO_ARCH_VTABLE_REG, AMD64_ARG_REG1, sizeof(gpointer));
717 code = mono_arch_emit_load_aotconst (buf, code, &ji, MONO_PATCH_INFO_JIT_ICALL_ADDR, g_strdup_printf ("specific_trampoline_lazy_fetch_%u", slot));
718 amd64_jump_reg (code, AMD64_R11);
720 tramp = (guint8 *)mono_arch_create_specific_trampoline (GUINT_TO_POINTER (slot), MONO_TRAMPOLINE_RGCTX_LAZY_FETCH, mono_get_root_domain (), NULL);
722 /* jump to the actual trampoline */
723 amd64_jump_code (code, tramp);
726 mono_arch_flush_icache (buf, code - buf);
727 MONO_PROFILER_RAISE (jit_code_buffer, (buf, code - buf, MONO_PROFILER_CODE_BUFFER_GENERICS_TRAMPOLINE, NULL));
729 g_assert (code - buf <= tramp_size);
730 g_assert_checked (mono_arch_unwindinfo_validate_size (unwind_ops, MONO_TRAMPOLINE_UNWINDINFO_SIZE(0)));
732 char *name = mono_get_rgctx_fetch_trampoline_name (slot);
733 *info = mono_tramp_info_create (name, buf, code - buf, ji, unwind_ops);
740 mono_arch_create_general_rgctx_lazy_fetch_trampoline (MonoTrampInfo **info, gboolean aot)
744 MonoJumpInfo *ji = NULL;
750 code = buf = (guint8 *)mono_global_codeman_reserve (tramp_size + MONO_TRAMPOLINE_UNWINDINFO_SIZE(0));
752 unwind_ops = mono_arch_get_cie_program ();
754 // FIXME: Currently, we always go to the slow path.
755 /* This receives a <slot, trampoline> in the rgctx arg reg. */
756 /* Load trampoline addr */
757 amd64_mov_reg_membase (code, AMD64_R11, MONO_ARCH_RGCTX_REG, 8, 8);
758 /* move the rgctx pointer to the VTABLE register */
759 amd64_mov_reg_reg (code, MONO_ARCH_VTABLE_REG, AMD64_ARG_REG1, sizeof(gpointer));
760 /* Jump to the trampoline */
761 amd64_jump_reg (code, AMD64_R11);
763 mono_arch_flush_icache (buf, code - buf);
764 MONO_PROFILER_RAISE (jit_code_buffer, (buf, code - buf, MONO_PROFILER_CODE_BUFFER_GENERICS_TRAMPOLINE, NULL));
766 g_assert (code - buf <= tramp_size);
767 g_assert_checked (mono_arch_unwindinfo_validate_size (unwind_ops, MONO_TRAMPOLINE_UNWINDINFO_SIZE(0)));
770 *info = mono_tramp_info_create ("rgctx_fetch_trampoline_general", buf, code - buf, ji, unwind_ops);
776 mono_arch_invalidate_method (MonoJitInfo *ji, void *func, gpointer func_arg)
778 /* FIXME: This is not thread safe */
779 guint8 *code = (guint8 *)ji->code_start;
781 amd64_mov_reg_imm (code, AMD64_ARG_REG1, func_arg);
782 amd64_mov_reg_imm (code, AMD64_R11, func);
784 x86_push_imm (code, (guint64)func_arg);
785 amd64_call_reg (code, AMD64_R11);
787 #endif /* !DISABLE_JIT */
790 mono_amd64_handler_block_trampoline_helper (void)
792 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_tls_get_jit_tls ();
793 return jit_tls->handler_block_return_address;
798 mono_arch_create_handler_block_trampoline (MonoTrampInfo **info, gboolean aot)
802 MonoJumpInfo *ji = NULL;
805 code = buf = (guint8 *)mono_global_codeman_reserve (tramp_size + MONO_TRAMPOLINE_UNWINDINFO_SIZE(0));
807 unwind_ops = mono_arch_get_cie_program ();
810 * This trampoline restore the call chain of the handler block then jumps into the code that deals with it.
811 * We get here from the ret emitted by CEE_ENDFINALLY.
812 * The stack is misaligned.
814 /* Align the stack before the call to mono_amd64_handler_block_trampoline_helper() */
816 /* Also make room for the "register parameter stack area" as specified by the Windows x64 ABI (4 64-bit registers) */
817 amd64_alu_reg_imm (code, X86_SUB, AMD64_RSP, 8 + 4 * 8);
819 amd64_alu_reg_imm (code, X86_SUB, AMD64_RSP, 8);
822 code = mono_arch_emit_load_aotconst (buf, code, &ji, MONO_PATCH_INFO_JIT_ICALL_ADDR, "mono_amd64_handler_block_trampoline_helper");
823 amd64_call_reg (code, AMD64_R11);
825 amd64_mov_reg_imm (code, AMD64_RAX, mono_amd64_handler_block_trampoline_helper);
826 amd64_call_reg (code, AMD64_RAX);
828 /* Undo stack alignment */
830 amd64_alu_reg_imm (code, X86_ADD, AMD64_RSP, 8 + 4 * 8);
832 amd64_alu_reg_imm (code, X86_ADD, AMD64_RSP, 8);
834 /* Save the result to the stack */
835 amd64_push_reg (code, AMD64_RAX);
837 /* Make room for the "register parameter stack area" as specified by the Windows x64 ABI (4 64-bit registers) */
838 amd64_alu_reg_imm (code, X86_SUB, AMD64_RSP, 4 * 8);
841 char *name = g_strdup_printf ("trampoline_func_%d", MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD);
842 code = mono_arch_emit_load_aotconst (buf, code, &ji, MONO_PATCH_INFO_JIT_ICALL_ADDR, name);
843 amd64_mov_reg_reg (code, AMD64_RAX, AMD64_R11, 8);
845 amd64_mov_reg_imm (code, AMD64_RAX, mono_get_trampoline_func (MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD));
847 /* The stack is aligned */
848 amd64_call_reg (code, AMD64_RAX);
850 amd64_alu_reg_imm (code, X86_ADD, AMD64_RSP, 4 * 8);
852 /* Load return address */
853 amd64_pop_reg (code, AMD64_RAX);
854 /* The stack is misaligned, thats what the code we branch to expects */
855 amd64_jump_reg (code, AMD64_RAX);
857 mono_arch_flush_icache (buf, code - buf);
858 MONO_PROFILER_RAISE (jit_code_buffer, (buf, code - buf, MONO_PROFILER_CODE_BUFFER_HELPER, NULL));
859 g_assert (code - buf <= tramp_size);
860 g_assert_checked (mono_arch_unwindinfo_validate_size (unwind_ops, MONO_TRAMPOLINE_UNWINDINFO_SIZE(0)));
862 *info = mono_tramp_info_create ("handler_block_trampoline", buf, code - buf, ji, unwind_ops);
866 #endif /* !DISABLE_JIT */
869 * mono_arch_get_call_target:
871 * Return the address called by the code before CODE if exists.
874 mono_arch_get_call_target (guint8 *code)
876 if (code [-5] == 0xe8) {
877 gint32 disp = *(gint32*)(code - 4);
878 guint8 *target = code + disp;
887 * mono_arch_get_plt_info_offset:
889 * Return the PLT info offset belonging to the plt entry PLT_ENTRY.
892 mono_arch_get_plt_info_offset (guint8 *plt_entry, mgreg_t *regs, guint8 *code)
894 return *(guint32*)(plt_entry + 6);
899 * mono_arch_create_sdb_trampoline:
901 * Return a trampoline which captures the current context, passes it to
902 * debugger_agent_single_step_from_context ()/debugger_agent_breakpoint_from_context (),
903 * then restores the (potentially changed) context.
906 mono_arch_create_sdb_trampoline (gboolean single_step, MonoTrampInfo **info, gboolean aot)
908 int tramp_size = 512;
909 int i, framesize, ctx_offset, cfa_offset, gregs_offset;
911 GSList *unwind_ops = NULL;
912 MonoJumpInfo *ji = NULL;
914 code = buf = (guint8 *)mono_global_codeman_reserve (tramp_size + MONO_MAX_TRAMPOLINE_UNWINDINFO_SIZE);
918 /* Reserve space where the callee can save the argument registers */
919 framesize += 4 * sizeof (mgreg_t);
922 ctx_offset = framesize;
923 framesize += sizeof (MonoContext);
925 framesize = ALIGN_TO (framesize, MONO_ARCH_FRAME_ALIGNMENT);
929 mono_add_unwind_op_def_cfa (unwind_ops, code, buf, AMD64_RSP, 8);
930 // IP saved at CFA - 8
931 mono_add_unwind_op_offset (unwind_ops, code, buf, AMD64_RIP, -cfa_offset);
933 amd64_push_reg (code, AMD64_RBP);
934 cfa_offset += sizeof(mgreg_t);
935 mono_add_unwind_op_def_cfa_offset (unwind_ops, code, buf, cfa_offset);
936 mono_add_unwind_op_offset (unwind_ops, code, buf, AMD64_RBP, - cfa_offset);
938 amd64_mov_reg_reg (code, AMD64_RBP, AMD64_RSP, sizeof(mgreg_t));
939 mono_add_unwind_op_def_cfa_reg (unwind_ops, code, buf, AMD64_RBP);
940 mono_add_unwind_op_fp_alloc (unwind_ops, code, buf, AMD64_RBP, 0);
941 amd64_alu_reg_imm (code, X86_SUB, AMD64_RSP, framesize);
943 gregs_offset = ctx_offset + MONO_STRUCT_OFFSET (MonoContext, gregs);
945 /* Initialize a MonoContext structure on the stack */
946 for (i = 0; i < AMD64_NREG; ++i) {
947 if (i != AMD64_RIP && i != AMD64_RSP && i != AMD64_RBP)
948 amd64_mov_membase_reg (code, AMD64_RSP, gregs_offset + (i * sizeof (mgreg_t)), i, sizeof (mgreg_t));
950 amd64_mov_reg_membase (code, AMD64_R11, AMD64_RBP, 0, sizeof (mgreg_t));
951 amd64_mov_membase_reg (code, AMD64_RSP, gregs_offset + (AMD64_RBP * sizeof (mgreg_t)), AMD64_R11, sizeof (mgreg_t));
952 amd64_lea_membase (code, AMD64_R11, AMD64_RBP, 2 * sizeof (mgreg_t));
953 amd64_mov_membase_reg (code, AMD64_RSP, gregs_offset + (AMD64_RSP * sizeof (mgreg_t)), AMD64_R11, sizeof (mgreg_t));
954 amd64_mov_reg_membase (code, AMD64_R11, AMD64_RBP, sizeof (mgreg_t), sizeof (mgreg_t));
955 amd64_mov_membase_reg (code, AMD64_RSP, gregs_offset + (AMD64_RIP * sizeof (mgreg_t)), AMD64_R11, sizeof (mgreg_t));
957 /* Call the single step/breakpoint function in sdb */
958 amd64_lea_membase (code, AMD64_ARG_REG1, AMD64_RSP, ctx_offset);
962 code = mono_arch_emit_load_aotconst (buf, code, &ji, MONO_PATCH_INFO_JIT_ICALL_ADDR, "debugger_agent_single_step_from_context");
964 code = mono_arch_emit_load_aotconst (buf, code, &ji, MONO_PATCH_INFO_JIT_ICALL_ADDR, "debugger_agent_breakpoint_from_context");
967 amd64_mov_reg_imm (code, AMD64_R11, debugger_agent_single_step_from_context);
969 amd64_mov_reg_imm (code, AMD64_R11, debugger_agent_breakpoint_from_context);
971 amd64_call_reg (code, AMD64_R11);
973 /* Restore registers from ctx */
974 for (i = 0; i < AMD64_NREG; ++i) {
975 if (i != AMD64_RIP && i != AMD64_RSP && i != AMD64_RBP)
976 amd64_mov_reg_membase (code, i, AMD64_RSP, gregs_offset + (i * sizeof (mgreg_t)), sizeof (mgreg_t));
978 amd64_mov_reg_membase (code, AMD64_R11, AMD64_RSP, gregs_offset + (AMD64_RBP * sizeof (mgreg_t)), sizeof (mgreg_t));
979 amd64_mov_membase_reg (code, AMD64_RBP, 0, AMD64_R11, sizeof (mgreg_t));
980 amd64_mov_reg_membase (code, AMD64_R11, AMD64_RSP, gregs_offset + (AMD64_RIP * sizeof (mgreg_t)), sizeof (mgreg_t));
981 amd64_mov_membase_reg (code, AMD64_RBP, sizeof (mgreg_t), AMD64_R11, sizeof (mgreg_t));
984 amd64_lea_membase (code, AMD64_RSP, AMD64_RBP, 0);
985 amd64_pop_reg (code, AMD64_RBP);
986 mono_add_unwind_op_same_value (unwind_ops, code, buf, AMD64_RBP);
990 cfa_offset -= sizeof (mgreg_t);
991 mono_add_unwind_op_def_cfa (unwind_ops, code, buf, AMD64_RSP, cfa_offset);
994 mono_arch_flush_icache (code, code - buf);
995 MONO_PROFILER_RAISE (jit_code_buffer, (buf, code - buf, MONO_PROFILER_CODE_BUFFER_HELPER, NULL));
996 g_assert (code - buf <= tramp_size);
997 g_assert_checked (mono_arch_unwindinfo_validate_size (unwind_ops, MONO_MAX_TRAMPOLINE_UNWINDINFO_SIZE));
999 const char *tramp_name = single_step ? "sdb_single_step_trampoline" : "sdb_breakpoint_trampoline";
1000 *info = mono_tramp_info_create (tramp_name, buf, code - buf, ji, unwind_ops);
1006 * mono_arch_get_enter_icall_trampoline:
1008 * A trampoline that handles the transition from interpreter into native
1009 * world. It requiers to set up a descriptor (InterpMethodArguments), so the
1010 * trampoline can translate the arguments into the native calling convention.
1012 * See also `build_args_from_sig ()` in interp.c.
1015 mono_arch_get_enter_icall_trampoline (MonoTrampInfo **info)
1017 #ifdef ENABLE_INTERPRETER
1018 const int gregs_num = INTERP_ICALL_TRAMP_IARGS;
1019 const int fregs_num = INTERP_ICALL_TRAMP_FARGS;
1020 guint8 *start = NULL, *code, *label_gexits [gregs_num], *label_fexits [fregs_num], *label_leave_tramp [3], *label_is_float_ret;
1021 MonoJumpInfo *ji = NULL;
1022 GSList *unwind_ops = NULL;
1023 static int farg_regs[] = {AMD64_XMM0, AMD64_XMM1, AMD64_XMM2};
1024 int buf_len, i, framesize = 0, off_rbp, off_methodargs, off_targetaddr;
1026 buf_len = 512 + MONO_TRAMPOLINE_UNWINDINFO_SIZE(0);
1027 start = code = (guint8 *) mono_global_codeman_reserve (buf_len);
1029 off_rbp = -framesize;
1031 framesize += sizeof (mgreg_t);
1032 off_methodargs = -framesize;
1034 framesize += sizeof (mgreg_t);
1035 off_targetaddr = -framesize;
1037 framesize += (gregs_num - PARAM_REGS) * sizeof (mgreg_t);
1039 amd64_push_reg (code, AMD64_RBP);
1040 amd64_mov_reg_reg (code, AMD64_RBP, AMD64_RSP, sizeof (mgreg_t));
1041 amd64_alu_reg_imm (code, X86_SUB, AMD64_RSP, ALIGN_TO (framesize, MONO_ARCH_FRAME_ALIGNMENT));
1043 /* save InterpMethodArguments* onto stack */
1044 amd64_mov_membase_reg (code, AMD64_RBP, off_methodargs, AMD64_ARG_REG2, sizeof (mgreg_t));
1046 /* save target address on stack */
1047 amd64_mov_membase_reg (code, AMD64_RBP, off_targetaddr, AMD64_ARG_REG1, sizeof (mgreg_t));
1049 /* load pointer to InterpMethodArguments* into R11 */
1050 amd64_mov_reg_reg (code, AMD64_R11, AMD64_ARG_REG2, 8);
1052 /* move flen into RAX */
1053 amd64_mov_reg_membase (code, AMD64_RAX, AMD64_R11, MONO_STRUCT_OFFSET (InterpMethodArguments, flen), sizeof (mgreg_t));
1054 /* load pointer to fargs into R11 */
1055 amd64_mov_reg_membase (code, AMD64_R11, AMD64_R11, MONO_STRUCT_OFFSET (InterpMethodArguments, fargs), sizeof (mgreg_t));
1057 for (i = 0; i < fregs_num; ++i) {
1058 amd64_test_reg_reg (code, AMD64_RAX, AMD64_RAX);
1059 label_fexits [i] = code;
1060 x86_branch8 (code, X86_CC_Z, 0, FALSE);
1062 amd64_sse_movsd_reg_membase (code, farg_regs [i], AMD64_R11, i * sizeof (double));
1063 amd64_dec_reg_size (code, AMD64_RAX, 1);
1066 for (i = 0; i < fregs_num; i++)
1067 x86_patch (label_fexits [i], code);
1069 /* load pointer to InterpMethodArguments* into R11 */
1070 amd64_mov_reg_reg (code, AMD64_R11, AMD64_ARG_REG2, sizeof (mgreg_t));
1071 /* move ilen into RAX */
1072 amd64_mov_reg_membase (code, AMD64_RAX, AMD64_R11, MONO_STRUCT_OFFSET (InterpMethodArguments, ilen), sizeof (mgreg_t));
1074 int stack_offset = 0;
1075 for (i = 0; i < gregs_num; i++) {
1076 amd64_test_reg_reg (code, AMD64_RAX, AMD64_RAX);
1077 label_gexits [i] = code;
1078 x86_branch32 (code, X86_CC_Z, 0, FALSE);
1080 /* load pointer to InterpMethodArguments* into R11 */
1081 amd64_mov_reg_membase (code, AMD64_R11, AMD64_RBP, off_methodargs, sizeof (mgreg_t));
1082 /* load pointer to iargs into R11 */
1083 amd64_mov_reg_membase (code, AMD64_R11, AMD64_R11, MONO_STRUCT_OFFSET (InterpMethodArguments, iargs), sizeof (mgreg_t));
1085 if (i < PARAM_REGS) {
1086 amd64_mov_reg_membase (code, param_regs [i], AMD64_R11, i * sizeof (mgreg_t), sizeof (mgreg_t));
1088 amd64_mov_reg_membase (code, AMD64_R11, AMD64_R11, i * sizeof (mgreg_t), sizeof (mgreg_t));
1089 amd64_mov_membase_reg (code, AMD64_RSP, stack_offset, AMD64_R11, sizeof (mgreg_t));
1090 stack_offset += sizeof (mgreg_t);
1092 amd64_dec_reg_size (code, AMD64_RAX, 1);
1095 for (i = 0; i < gregs_num; i++)
1096 x86_patch (label_gexits [i], code);
1098 /* load target addr */
1099 amd64_mov_reg_membase (code, AMD64_R11, AMD64_RBP, off_targetaddr, sizeof (mgreg_t));
1101 /* call into native function */
1102 amd64_call_reg (code, AMD64_R11);
1104 /* load InterpMethodArguments */
1105 amd64_mov_reg_membase (code, AMD64_R11, AMD64_RBP, off_methodargs, sizeof (mgreg_t));
1107 /* load is_float_ret */
1108 amd64_mov_reg_membase (code, AMD64_R11, AMD64_R11, MONO_STRUCT_OFFSET (InterpMethodArguments, is_float_ret), sizeof (mgreg_t));
1110 /* check if a float return value is expected */
1111 amd64_test_reg_reg (code, AMD64_R11, AMD64_R11);
1113 label_is_float_ret = code;
1114 x86_branch8 (code, X86_CC_NZ, 0, FALSE);
1117 /* load InterpMethodArguments */
1118 amd64_mov_reg_membase (code, AMD64_R11, AMD64_RBP, off_methodargs, sizeof (mgreg_t));
1120 amd64_mov_reg_membase (code, AMD64_R11, AMD64_R11, MONO_STRUCT_OFFSET (InterpMethodArguments, retval), sizeof (mgreg_t));
1122 amd64_test_reg_reg (code, AMD64_R11, AMD64_R11);
1123 label_leave_tramp [0] = code;
1124 x86_branch8 (code, X86_CC_Z, 0, FALSE);
1126 amd64_mov_membase_reg (code, AMD64_R11, 0, AMD64_RAX, sizeof (mgreg_t));
1128 label_leave_tramp [1] = code;
1129 x86_jump8 (code, 0);
1132 x86_patch (label_is_float_ret, code);
1133 /* load InterpMethodArguments */
1134 amd64_mov_reg_membase (code, AMD64_R11, AMD64_RBP, off_methodargs, sizeof (mgreg_t));
1136 amd64_mov_reg_membase (code, AMD64_R11, AMD64_R11, MONO_STRUCT_OFFSET (InterpMethodArguments, retval), sizeof (mgreg_t));
1138 amd64_test_reg_reg (code, AMD64_R11, AMD64_R11);
1139 label_leave_tramp [2] = code;
1140 x86_branch8 (code, X86_CC_Z, 0, FALSE);
1142 amd64_sse_movsd_membase_reg (code, AMD64_R11, 0, AMD64_XMM0);
1144 for (i = 0; i < 3; i++)
1145 x86_patch (label_leave_tramp [i], code);
1147 amd64_alu_reg_imm (code, X86_ADD, AMD64_RSP, ALIGN_TO (framesize, MONO_ARCH_FRAME_ALIGNMENT));
1148 amd64_pop_reg (code, AMD64_RBP);
1151 g_assert (code - start < buf_len);
1153 mono_arch_flush_icache (start, code - start);
1154 MONO_PROFILER_RAISE (jit_code_buffer, (start, code - start, MONO_PROFILER_CODE_BUFFER_EXCEPTION_HANDLING, NULL));
1157 *info = mono_tramp_info_create ("enter_icall_trampoline", start, code - start, ji, unwind_ops);
1161 g_assert_not_reached ();
1163 #endif /* ENABLE_INTERPRETER */
1165 #endif /* !DISABLE_JIT */
1169 mono_arch_get_unbox_trampoline (MonoMethod *m, gpointer addr)
1171 g_assert_not_reached ();
1176 mono_arch_get_static_rgctx_trampoline (gpointer arg, gpointer addr)
1178 g_assert_not_reached ();
1183 mono_arch_create_rgctx_lazy_fetch_trampoline (guint32 slot, MonoTrampInfo **info, gboolean aot)
1185 g_assert_not_reached ();
1190 mono_arch_create_generic_trampoline (MonoTrampolineType tramp_type, MonoTrampInfo **info, gboolean aot)
1192 g_assert_not_reached ();
1197 mono_arch_create_specific_trampoline (gpointer arg1, MonoTrampolineType tramp_type, MonoDomain *domain, guint32 *code_len)
1199 g_assert_not_reached ();
1204 mono_arch_create_general_rgctx_lazy_fetch_trampoline (MonoTrampInfo **info, gboolean aot)
1206 g_assert_not_reached ();
1211 mono_arch_create_handler_block_trampoline (MonoTrampInfo **info, gboolean aot)
1213 g_assert_not_reached ();
1218 mono_arch_invalidate_method (MonoJitInfo *ji, void *func, gpointer func_arg)
1220 g_assert_not_reached ();
1225 mono_arch_create_sdb_trampoline (gboolean single_step, MonoTrampInfo **info, gboolean aot)
1227 g_assert_not_reached ();
1232 mono_arch_get_enter_icall_trampoline (MonoTrampInfo **info)
1234 g_assert_not_reached ();
1237 #endif /* DISABLE_JIT */