Hacking together proper stack saving. Can't get >128b frames working.

2014-01-31 22:16:05 -08:00
parent f85b83709e
commit 009a6d0745
14 changed files with 424 additions and 80 deletions
--- a/src/alloy/backend/x64/x64_thunk_emitter.cc
+++ b/src/alloy/backend/x64/x64_thunk_emitter.cc
@@ -0,0 +1,139 @@
+/**
+ ******************************************************************************
+ * Xenia : Xbox 360 Emulator Research Project                                 *
+ ******************************************************************************
+ * Copyright 2014 Ben Vanik. All rights reserved.                             *
+ * Released under the BSD license - see LICENSE in the root for more details. *
+ ******************************************************************************
+ */
+
+#include <alloy/backend/x64/x64_thunk_emitter.h>
+
+#include <third_party/xbyak/xbyak/xbyak.h>
+
+
+using namespace alloy;
+using namespace alloy::backend;
+using namespace alloy::backend::x64;
+
+using namespace Xbyak;
+
+
+X64ThunkEmitter::X64ThunkEmitter(
+    X64Backend* backend, XbyakAllocator* allocator) :
+    X64Emitter(backend, allocator) {
+}
+
+X64ThunkEmitter::~X64ThunkEmitter() {
+}
+
+HostToGuestThunk X64ThunkEmitter::EmitHostToGuestThunk() {
+  // rcx = target
+  // rdx = arg0
+  // r8 = arg1
+
+  const size_t stack_size = StackLayout::THUNK_STACK_SIZE;
+  // rsp + 0 = return address
+  mov(qword[rsp + 8 * 2], rdx);
+  mov(qword[rsp + 8 * 1], rcx);
+  sub(rsp, stack_size);
+
+  mov(qword[rsp + 56], rbx);
+  mov(qword[rsp + 64], rbp);
+  mov(qword[rsp + 72], rsi);
+  mov(qword[rsp + 80], rdi);
+  mov(qword[rsp + 88], r12);
+  mov(qword[rsp + 96], r13);
+  mov(qword[rsp + 104], r14);
+  mov(qword[rsp + 112], r15);
+
+  /*movaps(ptr[rsp + 128], xmm6);
+  movaps(ptr[rsp + 144], xmm7);
+  movaps(ptr[rsp + 160], xmm8);
+  movaps(ptr[rsp + 176], xmm9);
+  movaps(ptr[rsp + 192], xmm10);
+  movaps(ptr[rsp + 208], xmm11);
+  movaps(ptr[rsp + 224], xmm12);
+  movaps(ptr[rsp + 240], xmm13);
+  movaps(ptr[rsp + 256], xmm14);
+  movaps(ptr[rsp + 272], xmm15);*/
+
+  mov(rax, rcx);
+  mov(rcx, rdx);
+  mov(rdx, r8);
+  call(rax);
+
+  /*movaps(xmm6, ptr[rsp + 128]);
+  movaps(xmm7, ptr[rsp + 144]);
+  movaps(xmm8, ptr[rsp + 160]);
+  movaps(xmm9, ptr[rsp + 176]);
+  movaps(xmm10, ptr[rsp + 192]);
+  movaps(xmm11, ptr[rsp + 208]);
+  movaps(xmm12, ptr[rsp + 224]);
+  movaps(xmm13, ptr[rsp + 240]);
+  movaps(xmm14, ptr[rsp + 256]);
+  movaps(xmm15, ptr[rsp + 272]);*/
+
+  mov(rbx, qword[rsp + 56]);
+  mov(rbp, qword[rsp + 64]);
+  mov(rsi, qword[rsp + 72]);
+  mov(rdi, qword[rsp + 80]);
+  mov(r12, qword[rsp + 88]);
+  mov(r13, qword[rsp + 96]);
+  mov(r14, qword[rsp + 104]);
+  mov(r15, qword[rsp + 112]);
+
+  add(rsp, stack_size);
+  mov(rcx, qword[rsp + 8 * 1]);
+  mov(rdx, qword[rsp + 8 * 2]);
+  ret();
+
+  void* fn = Emplace(stack_size);
+  return (HostToGuestThunk)fn;
+}
+
+GuestToHostThunk X64ThunkEmitter::EmitGuestToHostThunk() {
+  // rcx = context
+  // rdx = target function
+  // r8  = arg0
+  // r9  = arg1
+  
+  const size_t stack_size = StackLayout::THUNK_STACK_SIZE;
+  // rsp + 0 = return address
+  mov(qword[rsp + 8 * 2], rdx);
+  mov(qword[rsp + 8 * 1], rcx);
+  sub(rsp, stack_size);
+
+  mov(qword[rsp + 56], rbx);
+  mov(qword[rsp + 64], rbp);
+  mov(qword[rsp + 72], rsi);
+  mov(qword[rsp + 80], rdi);
+  mov(qword[rsp + 88], r12);
+  mov(qword[rsp + 96], r13);
+  mov(qword[rsp + 104], r14);
+  mov(qword[rsp + 112], r15);
+
+  // TODO(benvanik): save things? XMM0-5?
+
+  mov(rax, rdx);
+  mov(rdx, r8);
+  mov(r8, r9);
+  call(rax);
+
+  mov(rbx, qword[rsp + 56]);
+  mov(rbp, qword[rsp + 64]);
+  mov(rsi, qword[rsp + 72]);
+  mov(rdi, qword[rsp + 80]);
+  mov(r12, qword[rsp + 88]);
+  mov(r13, qword[rsp + 96]);
+  mov(r14, qword[rsp + 104]);
+  mov(r15, qword[rsp + 112]);
+  
+  add(rsp, stack_size);
+  mov(rcx, qword[rsp + 8 * 1]);
+  mov(rdx, qword[rsp + 8 * 2]);
+  ret();
+
+  void* fn = Emplace(stack_size);
+  return (HostToGuestThunk)fn;
+}