mirror of
https://github.com/pound-emu/pound.git
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71 lines
1.6 KiB
C++
71 lines
1.6 KiB
C++
// Copyright 2025 Pound Emulator Project. All rights reserved.
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#include "jit.h"
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#include <rem.h>
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#ifdef WIN32
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#include <Windows.h>
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#else
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#include <sys/mman.h>
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#endif
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#include <vector>
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using JitFunc = void (*)();
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void JIT::translate_and_run(CPU& cpu)
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{
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// TODO: Create REM Context
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create_rem_context(nullptr, nullptr, nullptr, nullptr, nullptr);
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#ifdef WIN32
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u8* code = (u8*)VirtualAlloc(NULL, 64, MEM_COMMIT | MEM_RESERVE, PAGE_EXECUTE_READWRITE);
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#else
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u8* code = (u8*)mmap(nullptr, 64, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANON, -1, 0);
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#endif
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size_t offset = 0;
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// Decode mock instructions from cpu.memory
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if (cpu.memory[0] == 0x05)
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{ // MOVZ placeholder
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code[offset++] = 0x48; // mov rax, imm64
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code[offset++] = 0xB8;
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u64 imm = 5;
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std::memcpy(&code[offset], &imm, sizeof(imm));
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offset += 8;
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}
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if (cpu.memory[4] == 0x03)
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{ // ADD placeholder
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code[offset++] = 0x48; // add rax, imm32
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code[offset++] = 0x05;
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u32 addval = 3;
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std::memcpy(&code[offset], &addval, sizeof(addval));
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offset += 4;
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}
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code[offset++] = 0xC3; // ret
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JitFunc fn = reinterpret_cast<JitFunc>(code);
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u64 result;
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#if defined(__x86_64__)
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asm volatile(
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"call *%1\n"
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"mov %%rax, %0\n"
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: "=r"(result)
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: "r"(fn)
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: "%rax");
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#elif defined(__aarch64__)
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asm volatile("blr %1\n"
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"mov %0, x0\n"
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: "=r"(result)
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: "r"(fn)
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: "x0");
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#endif
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cpu.regs[0] = result;
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}
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