883c2030d0
Based entirely off existing xbyak x86 implementation and available tests. Still needs a lot of optimization and testing on non-Windows platforms. So far passes all tests and boots at least some games on Windows.
86 lines
3.0 KiB
C++
86 lines
3.0 KiB
C++
/**
|
|
******************************************************************************
|
|
* Xenia : Xbox 360 Emulator Research Project *
|
|
******************************************************************************
|
|
* Copyright 2026 Ben Vanik. All rights reserved. *
|
|
* Released under the BSD license - see LICENSE in the root for more details. *
|
|
******************************************************************************
|
|
*/
|
|
|
|
#ifndef XENIA_CPU_BACKEND_A64_A64_STACK_LAYOUT_H_
|
|
#define XENIA_CPU_BACKEND_A64_A64_STACK_LAYOUT_H_
|
|
|
|
#include "xenia/base/vec128.h"
|
|
|
|
namespace xe {
|
|
namespace cpu {
|
|
namespace backend {
|
|
namespace a64 {
|
|
|
|
class StackLayout {
|
|
public:
|
|
/**
|
|
* ARM64 Thunk Stack Layout
|
|
* NOTE: stack must always be 16-byte aligned.
|
|
*
|
|
* Thunk (HostToGuest/GuestToHost):
|
|
* +------------------+
|
|
* | x19 | sp + 0x000
|
|
* | x20 (context) | sp + 0x008
|
|
* | x21 (membase) | sp + 0x010
|
|
* | x22 | sp + 0x018
|
|
* | x23 | sp + 0x020
|
|
* | x24 | sp + 0x028
|
|
* | x25 | sp + 0x030
|
|
* | x26 | sp + 0x038
|
|
* | x27 | sp + 0x040
|
|
* | x28 | sp + 0x048
|
|
* | x29 (fp) | sp + 0x050
|
|
* | x30 (lr) | sp + 0x058
|
|
* | d8 | sp + 0x060
|
|
* | d9 | sp + 0x068
|
|
* | d10 | sp + 0x070
|
|
* | d11 | sp + 0x078
|
|
* | d12 | sp + 0x080
|
|
* | d13 | sp + 0x088
|
|
* | d14 | sp + 0x090
|
|
* | d15 | sp + 0x098
|
|
* +------------------+
|
|
* Total: 0xA0 = 160 bytes (already 16-byte aligned)
|
|
*/
|
|
static constexpr size_t THUNK_STACK_SIZE = 160;
|
|
|
|
/**
|
|
* ARM64 Guest Stack Layout
|
|
* +------------------+
|
|
* | scratch, 48b | sp + 0x000 (3 x Q for VMX FP scratch)
|
|
* | guest ret addr | sp + 0x030 (guest PPC return address)
|
|
* | call ret addr | sp + 0x038 (next call's guest PPC return addr)
|
|
* | host ret addr | sp + 0x040 (host x30/LR, for ret instruction)
|
|
* | guest saved r1 | sp + 0x048 (guest r1 at function entry, for
|
|
* | | longjmp detection)
|
|
* | ... locals ... |
|
|
* +------------------+
|
|
*
|
|
* Minimum size: 80 bytes (aligned to 16).
|
|
*
|
|
* Convention: at guest function entry, x0 holds the guest PPC return
|
|
* address. The prolog stores it to GUEST_RET_ADDR and saves x30 (host
|
|
* LR) to HOST_RET_ADDR.
|
|
*/
|
|
static constexpr size_t GUEST_STACK_SIZE = 80; // 16-byte aligned
|
|
static constexpr size_t GUEST_SCRATCH = 0; // 48 bytes (3 x Q)
|
|
static constexpr size_t GUEST_RET_ADDR = 48;
|
|
static constexpr size_t GUEST_CALL_RET_ADDR = 56;
|
|
static constexpr size_t HOST_RET_ADDR = 64;
|
|
// Stackpoint depth after PushStackpoint in prolog, for longjmp detection.
|
|
static constexpr size_t GUEST_SAVED_STACKPOINT_DEPTH = 72;
|
|
};
|
|
|
|
} // namespace a64
|
|
} // namespace backend
|
|
} // namespace cpu
|
|
} // namespace xe
|
|
|
|
#endif // XENIA_CPU_BACKEND_A64_A64_STACK_LAYOUT_H_
|