mirror of
https://github.com/ksherlock/mpw.git
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826 lines
17 KiB
C++
826 lines
17 KiB
C++
// clang++ -c -std=c++11 -stdlib=libc++ -Wno-deprecated-declarations loader.cpp
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/*
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* Copyright (c) 2013, Kelvin W Sherlock
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include <cstdint>
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#include <cctype>
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#include <cstring>
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#include <string>
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#include <vector>
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#include <chrono>
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#include <sysexits.h>
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#include <getopt.h>
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#include <libgen.h>
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#include <unistd.h>
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#include <sys/stat.h>
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#include <CoreServices/CoreServices.h>
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#include <cpu/defs.h>
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#include <cpu/CpuModule.h>
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#include <cpu/fmem.h>
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#include <toolbox/toolbox.h>
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#include <toolbox/mm.h>
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#include <toolbox/os.h>
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#include <mpw/mpw.h>
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#include <mplite/mplite.h>
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#include <macos/sysequ.h>
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#include <macos/traps.h>
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#include "loader.h"
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#include "debugger.h"
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Settings Flags;
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const uint32_t kGlobalSize = 0x10000;
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// retained to make debugging easier.
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uint8_t *Memory = nullptr;
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uint32_t MemorySize = 0;
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#if 0
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uint32_t EmulatedNewPtr(uint32_t size)
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{
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if (size & 0x01) size++;
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if (HighWater + size > MemorySize)
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{
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fprintf(stderr, "Insufficient Memory!\n");
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exit(EX_CONFIG);
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}
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uint32_t address = HighWater;
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HighWater += size;
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std::memset(Memory + HighWater, 0, size);
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return address;
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}
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#endif
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uint8_t ReadByte(const void *data, uint32_t offset)
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{
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offset &= 0xffffff;
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return ((uint8_t *)data)[offset];
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}
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uint16_t ReadWord(const void *data, uint32_t offset)
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{
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offset &= 0xffffff;
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return (ReadByte(data, offset) << 8) | ReadByte(data, offset+1);
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}
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uint32_t ReadLong(const void *data, uint32_t offset)
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{
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offset &= 0xffffff;
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return (ReadWord(data, offset) << 16) | ReadWord(data, offset+2);
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}
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void WriteByte(void *data, uint32_t offset, uint8_t value)
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{
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offset &= 0xffffff;
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((uint8_t *)data)[offset] = value;
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}
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void WriteWord(void *data, uint32_t offset, uint16_t value)
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{
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offset &= 0xffffff;
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((uint8_t *)data)[offset++] = value >> 8;
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((uint8_t *)data)[offset++] = value;
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}
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void WriteLong(void *data, uint32_t offset, uint32_t value)
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{
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offset &= 0xffffff;
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((uint8_t *)data)[offset++] = value >> 24;
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((uint8_t *)data)[offset++] = value >> 16;
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((uint8_t *)data)[offset++] = value >> 8;
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((uint8_t *)data)[offset++] = value;
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}
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uint32_t load(const char *file)
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{
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ResFileRefNum refNum;
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FSRef ref;
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uint32_t returnAddress = 0;
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std::vector< std::pair<uint32_t, uint32_t> > segments; // segment, address
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uint32_t a5 = 0;
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uint32_t jtStart = 0;
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uint32_t jtEnd = 0;
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// todo -- call RM::Native to open and load the Resource File.
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assert(FSPathMakeRef( (const UInt8 *)file, &ref, NULL) == noErr);
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refNum = FSOpenResFile(&ref, fsRdPerm);
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assert(refNum != -1 );
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int l = Count1Resources('CODE');
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segments.reserve(l);
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assert(l > 0);
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for (int i = 0; i < l; ++i)
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{
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ResAttributes attr;
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ResID resID;
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ResType resType;
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Str255 name;
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uint32_t size;
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uint32_t address;
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Handle h;
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const uint8_t *data;
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uint16_t error;
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h = Get1IndResource('CODE', i + 1);
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if (!h) continue;
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HLock(h);
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data = *(const uint8_t **)h;
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attr = GetResAttrs(h);
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GetResInfo(h, &resID, &resType, name);
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size = GetHandleSize(h);
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if (segments.size() <= resID) segments.resize(resID + 1);
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// can't have duplicate resIDs, so no need to check that...
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if (resID == 0)
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{
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// jump table/a5
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uint32_t above = ReadLong(data, 0);
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uint32_t below = ReadLong(data, 4);
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uint32_t jtSize = ReadLong(data, 8);
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uint32_t jtOffset = ReadLong(data, 12);
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uint32_t a5size = above + below;
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// TODO -- verify numbers are on word boundary?
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error = MM::Native::NewPtr(a5size, true, address);
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if (error)
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{
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fprintf(stderr, "Memory allocation error.\n");
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return 0;
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}
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a5 = address + below;
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std::memcpy(memoryPointer(a5 + jtOffset), data + 16 , jtSize);
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segments[resID] = std::make_pair(address, a5size);
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jtStart = a5 + jtOffset;
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jtEnd = jtStart + jtSize;
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// 0x0934 - CurJTOffset (16-bit)
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memoryWriteWord(jtOffset, MacOS::CurJTOffset);
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// 0x0904 -- CurrentA5 (32-bit)
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memoryWriteLong(a5, MacOS::CurrentA5);
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cpuSetAReg(5, a5);
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}
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else
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{
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error = MM::Native::NewPtr(size, false, address);
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if (error)
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{
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fprintf(stderr, "Memory allocation error.\n");
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return 0;
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}
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std::memcpy(memoryPointer(address), data, size);
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segments[resID] = std::make_pair(address, size);
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}
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ReleaseResource(h);
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}
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// now link the segment 0 jump table...
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assert(a5);
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bool first = true;
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for (; jtStart < jtEnd; jtStart += 8)
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{
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uint16_t offset = memoryReadWord(jtStart);
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uint16_t seg = memoryReadWord(jtStart + 4);
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assert(memoryReadWord(jtStart + 2) == 0x3F3C);
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assert(memoryReadWord(jtStart + 6) == 0xA9F0);
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assert(seg < segments.size());
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auto p = segments[seg];
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assert(p.first); // missing segment?!
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assert(offset < p.second);
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// +4 for the jump table info header.
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uint32_t address = p.first + offset + 4;
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// JMP absolute long
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memoryWriteWord(0x4EF9, jtStart + 2);
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memoryWriteLong(address, jtStart + 4);
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if (first)
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{
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//cpuSetPC(address);
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returnAddress = address;
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first = false;
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}
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}
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// set pc to jump table entry 0.
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return returnAddress;
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}
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void GlobalInit()
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{
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// todo -- move this somewhere better.
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// 0x031a - Lo3Bytes
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memoryWriteLong(0x00ffffff, MacOS::Lo3Bytes);
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// 0x0a02 - OneOne
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memoryWriteLong(0x00010001, MacOS::OneOne);
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// 0x0a06 - MinusOne
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memoryWriteLong(0xffffffff, MacOS::MinusOne);
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// todo -- expects high stack, low heap.
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// the allocator currently works from the top down,
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// so put stack at top of memory?
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// 0x0130 -- ApplLimit
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memoryWriteLong(Flags.memorySize - 1, MacOS::ApplLimit);
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}
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void CreateStack()
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{
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// allocate stack, set A7...
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uint32_t address;
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uint16_t error;
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Flags.stackSize = (Flags.stackSize + 3) & ~0x03;
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error = MM::Native::NewPtr(Flags.stackSize, true, address);
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if (error)
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{
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fprintf(stderr, "Unable to allocate stack (%08x bytes)\n", Flags.stackSize);
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exit(EX_CONFIG);
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}
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Flags.stackRange.first = address;
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Flags.stackRange.second = address + Flags.stackSize;
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// TODO -- is there a global for the max (min) stack pointer?
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// address grows down
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// -4 is for the return address.
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cpuSetAReg(7, Flags.stackRange.second - 4);
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// return address.
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memoryWriteLong(MacOS::MinusOne, Flags.stackRange.second - 4); // MinusOne Global -- 0xffff ffff
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}
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void LogToolBox(uint32_t pc, uint16_t trap)
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{
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const char *name;
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name = TrapName(trap);
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if (name)
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{
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fprintf(stderr, "$%08X %-51s ; %04X\n", pc, name, trap);
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}
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else
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{
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fprintf(stderr, "$%08X Tool #$%04X ; %04X\n", pc, trap, trap);
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}
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}
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void InstructionLogger()
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{
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static char strings[4][256];
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for (unsigned j = 0; j < 4; ++j) strings[j][0] = 0;
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uint32_t pc = cpuGetPC();
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uint16_t opcode = ReadWord(Memory, pc);
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if ((opcode & 0xf000) == 0xa000)
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{
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LogToolBox(pc, opcode);
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return;
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}
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if (Flags.traceCPU)
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{
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cpuDisOpcode(pc, strings[0], strings[1], strings[2], strings[3]);
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// address, data, instruction, operand
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fprintf(stderr, "%s %-10s %-40s ; %s\n", strings[0], strings[2], strings[3], strings[1]);
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// todo -- trace registers (only print changed registers?)
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#if 0
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if (pc >= 0x00010E94 && pc <= 0x00010FC0)
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{
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fprintf(stderr, "d7 = %08x\n", cpuGetDReg(7));
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}
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#endif
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}
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int mboffset = 0;
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switch (opcode)
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{
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case 0x4E75: // rts
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case 0x4ED0: // jmp (a0)
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mboffset = 2;
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break;
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case 0x4E74: // rtd #
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mboffset = 4;
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break;
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}
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if (mboffset) // RTS or JMP (A0)
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{
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pc += mboffset;
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// check for MacsBug name after rts.
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std::string s;
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unsigned b = memoryReadByte(pc);
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if (b > 0x80 && b < 0xa0)
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{
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b -= 0x80;
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pc++;
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s.reserve(b);
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for (unsigned i = 0; i < b; ++i)
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{
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s.push_back(memoryReadByte(pc++));
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}
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fprintf(stderr, "%s\n\n", s.c_str());
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}
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}
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}
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void MemoryLogger(uint32_t address, int size, int readWrite, uint32_t value)
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{
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if (address < kGlobalSize)
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{
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const char *name = GlobalName(address);
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if (!name) name = "unknown";
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fprintf(stderr, "%-20s %08x - ", name, address);
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if (!readWrite)
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{
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switch(size)
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{
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case 1:
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value = ReadByte(Memory, address);
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break;
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case 2:
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value = ReadWord(Memory, address);
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break;
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case 4:
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value = ReadLong(Memory, address);
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break;
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}
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}
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// todo -- for write, display previous value?
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fprintf(stderr, " %s %d bytes", readWrite ? "write" : "read ", size);
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switch(size)
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{
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case 1:
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fprintf(stderr, " [%02x]\n", value);
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break;
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case 2:
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fprintf(stderr, " [%04x]\n", value);
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break;
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case 3:
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fprintf(stderr, " [%06x]\n", value);
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break;
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case 4:
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fprintf(stderr, " [%08x]\n", value);
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break;
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default:
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fprintf(stderr, "\n");
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break;
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}
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}
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}
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#define MPW_VERSION "0.7.1 [kf]"
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void help()
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{
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printf("MPW " MPW_VERSION "\n");
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printf("Usage: mpw [options] utility ...\n");
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printf("\n");
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printf(" --help display usage information\n");
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printf(" --trace-cpu print cpu information\n");
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printf(" --trace-macsbug print macsbug names\n");
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printf(" --trace-toolbox print toolbox calls\n");
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printf(" --trace-mpw print mpw calls\n");
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printf(" --memory-stats print memory usage information\n");
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printf(" --ram=<number> set the ram size. Default=16M\n");
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printf(" --stack=<number> set the stack size. Default=8K\n");
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printf("\n");
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}
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bool parse_number(const char *input, uint32_t *dest)
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{
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char *end;
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long value;
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int base = 0;
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// octal is dumb so don't allow it.
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while (isspace(*input)) ++input;
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if (*input == '0' && isdigit(input[1])) base = 10;
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errno = 0;
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value = strtol(input, &end, base);
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if (errno || value < 0 || input == end)
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{
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fprintf(stderr, "%s - invalid input\n", input);
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return false;
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}
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// M/K
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if (*end)
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{
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int old = value;
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if (strcasecmp(end, "M") == 0)
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value *= 1024 * 1024;
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else if (strcasecmp(end, "K") == 0)
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value *= 1024;
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else
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{
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fprintf(stderr, "%s - invalid input\n", input);
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return false;
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}
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if (value < old)
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{
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// overflow
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fprintf(stderr, "%s - invalid input\n", input);
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return false;
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}
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}
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if (dest) *dest = value;
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return true;
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}
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bool file_exists(const std::string & name)
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{
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struct stat st;
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return ::stat(name.c_str(), &st) == 0 && S_ISREG(st.st_mode);
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}
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std::string find_exe(const std::string &name)
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{
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if (file_exists(name)) return name;
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// if name is a path, then it doesn't exist.
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if (name.find('/') != name.npos) return std::string();
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std::string path = MPW::RootDir();
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if (path.empty()) return path;
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if (path.back() != '/') path.push_back('/');
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path.append("Tools/");
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path.append(name);
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if (file_exists(path)) return path;
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return std::string();
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}
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void MainLoop()
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{
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#if 0
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auto begin_emu_time = std::chrono::high_resolution_clock::now();
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fprintf(stderr, "Begin Emulation Time: %20lld\n", (begin_emu_time - start_time).count());
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#endif
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uint64_t cycles = 0;
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for (;;)
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{
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uint32_t pc = cpuGetPC();
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uint32_t sp = cpuGetAReg(7);
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if (pc == 0x00000000)
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{
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fprintf(stderr, "Exiting - PC = 0\n");
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exit(EX_SOFTWARE);
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}
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if (sp < Flags.stackRange.first)
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{
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|
fprintf(stderr, "Stack overflow error - please increase the stack size (--stack=size)\n");
|
|
fprintf(stderr, "Current stack size is 0x%06x\n", Flags.stackSize);
|
|
exit(EX_SOFTWARE);
|
|
}
|
|
|
|
if (sp > Flags.stackRange.second)
|
|
{
|
|
fprintf(stderr, "Stack underflow error\n");
|
|
exit(EX_SOFTWARE);
|
|
}
|
|
|
|
|
|
if (cpuGetStop()) break; // will this also be set by an interrupt?
|
|
|
|
|
|
#ifndef CPU_INSTRUCTION_LOGGING
|
|
if (Flags.traceCPU || Flags.traceMacsbug)
|
|
{
|
|
InstructionLogger();
|
|
}
|
|
#endif
|
|
|
|
cycles += cpuExecuteInstruction();
|
|
}
|
|
|
|
#if 0
|
|
auto end_emu_time = std::chrono::high_resolution_clock::now();
|
|
fprintf(stderr, " End Emulation Time: %20lld\n", (end_emu_time - start_time).count());
|
|
fprintf(stderr, " Cycles: %20lld\n", cycles);
|
|
#endif
|
|
|
|
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
// getopt...
|
|
|
|
enum
|
|
{
|
|
kTraceCPU = 1,
|
|
kTraceMacsBug,
|
|
kTraceGlobals,
|
|
kTraceToolBox,
|
|
kTraceMPW,
|
|
kDebugger,
|
|
kMemoryStats,
|
|
};
|
|
static struct option LongOpts[] =
|
|
{
|
|
{ "ram",required_argument, NULL, 'r' },
|
|
{ "stack", required_argument, NULL, 's' },
|
|
{ "machine", required_argument, NULL, 'm' },
|
|
{ "trace-cpu", no_argument, NULL, kTraceCPU },
|
|
{ "trace-macsbug", no_argument, NULL, kTraceMacsBug },
|
|
{ "trace-globals", no_argument, NULL, kTraceGlobals },
|
|
{ "trace-toolbox", no_argument, NULL, kTraceToolBox },
|
|
{ "trace-tools", no_argument, NULL, kTraceToolBox },
|
|
{ "trace-mpw", no_argument, NULL, kTraceMPW },
|
|
|
|
{ "debug", no_argument, NULL, kDebugger },
|
|
{ "debugger", no_argument, NULL, kDebugger },
|
|
|
|
{ "memory-stats", no_argument, NULL, kMemoryStats },
|
|
|
|
{ "help", no_argument, NULL, 'h' },
|
|
{ "version", no_argument, NULL, 'V' },
|
|
{ NULL, 0, NULL, 0 }
|
|
};
|
|
|
|
//auto start_time = std::chrono::high_resolution_clock::now();
|
|
|
|
int c;
|
|
while ((c = getopt_long(argc, argv, "+hVm:r:s:", LongOpts, NULL)) != -1)
|
|
{
|
|
switch(c)
|
|
{
|
|
case kTraceCPU:
|
|
Flags.traceCPU = true;
|
|
break;
|
|
|
|
case kTraceMacsBug:
|
|
Flags.traceMacsbug = true;
|
|
break;
|
|
|
|
case kTraceGlobals:
|
|
Flags.traceGlobals = true;
|
|
break;
|
|
|
|
case kTraceToolBox:
|
|
Flags.traceToolBox = true;
|
|
break;
|
|
|
|
case kTraceMPW:
|
|
Flags.traceMPW = true;
|
|
break;
|
|
|
|
case kMemoryStats:
|
|
Flags.memoryStats = true;
|
|
break;
|
|
|
|
case kDebugger:
|
|
Flags.debugger = true;
|
|
break;
|
|
|
|
case 'm':
|
|
if (!parse_number(optarg, &Flags.machine))
|
|
exit(EX_CONFIG);
|
|
break;
|
|
|
|
case 'r':
|
|
if (!parse_number(optarg, &Flags.memorySize))
|
|
exit(EX_CONFIG);
|
|
break;
|
|
|
|
case 's':
|
|
if (!parse_number(optarg, &Flags.stackSize))
|
|
exit(EX_CONFIG);
|
|
break;
|
|
|
|
case ':':
|
|
case '?':
|
|
help();
|
|
exit(EX_USAGE);
|
|
break;
|
|
|
|
case 'h':
|
|
help();
|
|
exit(EX_OK);
|
|
break;
|
|
|
|
case 'V':
|
|
printf("mpw version " MPW_VERSION "\n");
|
|
exit(EX_OK);
|
|
break;
|
|
}
|
|
|
|
}
|
|
|
|
argc -= optind;
|
|
argv += optind;
|
|
|
|
if (!argc)
|
|
{
|
|
help();
|
|
exit(EX_USAGE);
|
|
}
|
|
|
|
if (Flags.stackSize < 0x100)
|
|
{
|
|
fprintf(stderr, "Invalid stack size\n");
|
|
exit(EX_CONFIG);
|
|
}
|
|
|
|
if (Flags.memorySize < 0x200)
|
|
{
|
|
fprintf(stderr, "Invalid ram size\n");
|
|
exit(EX_CONFIG);
|
|
}
|
|
|
|
|
|
std::string command(argv[0]); // InitMPW updates argv...
|
|
|
|
command = find_exe(command);
|
|
if (command.empty())
|
|
{
|
|
std::string mpw = MPW::RootDir();
|
|
fprintf(stderr, "Unable to find command %s\n", argv[0]);
|
|
fprintf(stderr, "$MPW = %s\n", mpw.c_str());
|
|
exit(EX_USAGE);
|
|
}
|
|
argv[0] = ::strdup(command.c_str()); // hmm.. could setenv(mpw_command) instead.
|
|
|
|
|
|
// move to CreateRam()
|
|
Memory = Flags.memory = new uint8_t[Flags.memorySize];
|
|
MemorySize = Flags.memorySize;
|
|
|
|
|
|
/// ahhh... need to set PC after memory.
|
|
// for pre-fetch.
|
|
memorySetMemory(Memory, MemorySize);
|
|
|
|
// should we subtract memory from the top
|
|
// for the stack vs allocating it?
|
|
|
|
MM::Init(Memory, MemorySize, kGlobalSize);
|
|
OS::Init();
|
|
MPW::Init(argc, argv);
|
|
|
|
|
|
cpuStartup();
|
|
cpuSetModel(3,0);
|
|
|
|
|
|
CreateStack();
|
|
|
|
|
|
uint32_t address = load(command.c_str());
|
|
if (!address) exit(EX_CONFIG);
|
|
|
|
GlobalInit();
|
|
|
|
|
|
cpuSetALineExceptionFunc(ToolBox::dispatch);
|
|
cpuSetFLineExceptionFunc(MPW::dispatch);
|
|
|
|
|
|
if (Flags.traceGlobals) //memorySetGlobalLog(kGlobalSize);
|
|
memorySetLoggingFunc(MemoryLogger);
|
|
|
|
MPW::Trace = Flags.traceMPW;
|
|
ToolBox::Trace = Flags.traceToolBox;
|
|
|
|
|
|
if (Flags.traceCPU || Flags.traceMacsbug)
|
|
{
|
|
#ifdef CPU_INSTRUCTION_LOGGING
|
|
cpuSetInstructionLoggingFunc(InstructionLogger);
|
|
#endif
|
|
// else do it manually below.
|
|
}
|
|
|
|
|
|
cpuInitializeFromNewPC(address);
|
|
|
|
|
|
if (Flags.debugger) Debug::Shell();
|
|
else MainLoop();
|
|
|
|
|
|
|
|
if (Flags.memoryStats)
|
|
{
|
|
MM::Native::PrintMemoryStats();
|
|
}
|
|
|
|
uint32_t rv = MPW::ExitStatus();
|
|
if (rv > 0xff) rv = 0xff;
|
|
|
|
|
|
|
|
exit(rv);
|
|
} |