mirror of
https://github.com/ksherlock/mpw.git
synced 2024-11-28 23:49:26 +00:00
1122 lines
19 KiB
C++
1122 lines
19 KiB
C++
#include "mm.h"
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#include "toolbox.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 <string>
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#include <deque>
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#include <vector>
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#include <map>
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#include <mplite/mplite.h>
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#include <macos/sysequ.h>
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#include <macos/errors.h>
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using ToolBox::Log;
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namespace
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{
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mplite_t pool;
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uint8_t *Memory;
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uint32_t MemorySize;
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// queue of free Handles
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std::deque<uint32_t> HandleQueue;
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// map of ptr -> size
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std::map<uint32_t, uint32_t> PtrMap;
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struct HandleInfo
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{
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uint32_t address;
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uint32_t size;
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bool locked;
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bool purgeable;
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HandleInfo(uint32_t a = 0, uint32_t s = 0) :
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address(a), size(s), locked(false), purgeable(false)
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{}
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};
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// map of handle -> size [? just use Ptr map?]
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std::map<uint32_t, HandleInfo> HandleMap;
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inline uint16_t SetMemError(uint16_t error)
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{
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memoryWriteWord(error, MacOS::MemErr);
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return error;
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}
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bool alloc_handle_block()
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{
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const unsigned HandleCount = 128; // 512 bytes of handle blocks.
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uint8_t *block = (uint8_t *)mplite_malloc(&pool,
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sizeof(uint32_t) * HandleCount);
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if (!block) return false;
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uint32_t hh = block - Memory;
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uint32_t end = hh + 128 * sizeof(uint32_t);
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for ( ; hh < end; hh += sizeof(uint32_t))
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{
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HandleQueue.push_back(hh);
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}
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return true;
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}
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}
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namespace MM
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{
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bool Init(uint8_t *memory, uint32_t memorySize, uint32_t reserved)
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{
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int ok;
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Memory = memory;
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MemorySize = memorySize;
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ok = mplite_init(&pool,
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memory + reserved,
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memorySize - reserved,
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32,
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NULL);
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if (ok != MPLITE_OK) return false;
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// allocate a handle master block...
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if (!alloc_handle_block()) return false;
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return true;
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}
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namespace Native {
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// debugger support.
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// print info on an address.
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void MemoryInfo(uint32_t address)
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{
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// 1. check if it's a pointer.
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{
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auto iter = PtrMap.find(address);
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if (iter != PtrMap.end())
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{
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printf("Pointer $%08x Size: $%08x\n", iter->first, iter->second);
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return;
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}
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}
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// 2. check if it's contained in a pointer
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for (const auto kv : PtrMap)
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{
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if (address < kv.first) continue;
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if (address >= kv.first + kv.second) continue;
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printf("Pointer $%08x Size: $%08x\n", kv.first, kv.second);
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return;
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}
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// 2. check if it's a handle.
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{
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auto iter = HandleMap.find(address);
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if (iter != HandleMap.end())
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{
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const HandleInfo &info = iter->second;
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printf("Handle $%08x Pointer: $%08x Size: $%08x Flags: %c %c\n",
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iter->first,
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info.address,
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info.size,
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info.locked ? 'L' : ' ',
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info.purgeable ? 'P' : ' '
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);
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return;
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}
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}
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// 3. check if the address is within a handle.
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{
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for (const auto kv : HandleMap)
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{
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const HandleInfo &info = kv.second;
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if (!info.address) continue;
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uint32_t begin = info.address;
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uint32_t end = info.address + info.size;
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if (!info.size) end++;
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if (address >= begin && address < end)
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{
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printf("Handle $%08x Pointer: $%08x Size: $%08x Flags: %c %c\n",
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kv.first,
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info.address,
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info.size,
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info.locked ? 'L' : ' ',
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info.purgeable ? 'P' : ' '
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);
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return;
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}
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}
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}
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}
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void PrintMemoryStats()
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{
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mplite_print_stats(&pool, std::puts);
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for (const auto & kv : HandleMap)
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{
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const auto h = kv.first;
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const auto & info = kv.second;
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fprintf(stdout, "%08x %08x %08x %c %c\n",
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h, info.address, info.size,
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info.locked? 'L' : ' ', info.purgeable? 'P' : ' ');
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}
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}
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uint16_t NewPtr(uint32_t size, bool clear, uint32_t &mcptr)
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{
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// native pointers.
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mcptr = 0;
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if (size == 0) return 0;
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uint8_t *ptr = nullptr;
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ptr = (uint8_t *)mplite_malloc(&pool, size);
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if (!ptr)
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{
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return SetMemError(MacOS::memFullErr);
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}
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if (clear)
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std::memset(ptr, 0, size);
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mcptr = ptr - Memory;
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PtrMap.emplace(std::make_pair(mcptr, size));
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return SetMemError(0);
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}
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uint16_t DisposePtr(uint32_t mcptr)
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{
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auto iter = PtrMap.find(mcptr);
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if (iter == PtrMap.end()) return SetMemError(MacOS::memWZErr);
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PtrMap.erase(iter);
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uint8_t *ptr = mcptr + Memory;
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mplite_free(&pool, ptr);
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return SetMemError(0);
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}
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uint16_t NewHandle(uint32_t size, bool clear, uint32_t &handle, uint32_t &mcptr)
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{
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uint8_t *ptr;
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uint32_t hh;
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handle = 0;
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mcptr = 0;
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if (!HandleQueue.size())
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{
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if (!alloc_handle_block())
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{
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return SetMemError(MacOS::memFullErr);
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}
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}
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hh = HandleQueue.front();
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HandleQueue.pop_front();
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ptr = nullptr;
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if (size)
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{
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ptr = (uint8_t *)mplite_malloc(&pool, size);
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if (!ptr)
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{
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HandleQueue.push_back(hh);
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return SetMemError(MacOS::memFullErr);
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}
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mcptr = ptr - Memory;
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if (clear)
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std::memset(ptr, 0, size);
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}
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// need a handle -> ptr map?
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HandleMap.emplace(std::make_pair(hh, HandleInfo(mcptr, size)));
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memoryWriteLong(mcptr, hh);
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handle = hh;
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return SetMemError(0);
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}
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uint16_t NewHandle(uint32_t size, bool clear, uint32_t &handle)
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{
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uint32_t ptr;
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return NewHandle(size, clear, handle, ptr);
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}
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uint16_t DisposeHandle(uint32_t handle)
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{
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auto iter = HandleMap.find(handle);
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if (iter == HandleMap.end()) return SetMemError(MacOS::memWZErr);
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HandleInfo info = iter->second;
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HandleMap.erase(iter);
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if (info.address)
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{
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uint8_t *ptr = info.address + Memory;
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mplite_free(&pool, ptr);
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}
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HandleQueue.push_back(handle);
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return SetMemError(0);
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}
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uint16_t GetHandleSize(uint32_t handle, uint32_t &handleSize)
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{
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handleSize = 0;
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const auto iter = HandleMap.find(handle);
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if (iter == HandleMap.end()) return SetMemError(MacOS::memWZErr);
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handleSize = iter->second.size;
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return SetMemError(0);
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}
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}
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uint16_t BlockMove(uint16_t trap)
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{
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/*
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* on entry:
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* A0 Pointer to source
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* A1 Pointer to destination
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* D0 Number of bytes to copy
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*
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* on exit:
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* A0 Address of the new block or NIL
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* D0 Result code
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*
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*/
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uint32_t source = cpuGetAReg(0);
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uint32_t dest = cpuGetAReg(1);
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uint32_t count = cpuGetDReg(0);
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Log("%04x BlockMove(%08x, %08x, %08x)\n",
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trap, source, dest, count);
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// TODO -- 32-bit clean?
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// TODO -- verify within MemorySize?
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#if 0
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if (source == 0 || dest == 0 || count == 0)
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return 0;
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#endif
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std::memmove(Memory + dest, Memory + source, count);
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return 0;
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}
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uint32_t CompactMem(uint16_t trap)
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{
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// todo -- add function to check pool for largest block?
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/*
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* on entry:
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* D0: cbNeeded (long word)
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*
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* on exit:
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* D0: function result (long word)
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*
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*/
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uint32_t cbNeeded = cpuGetDReg(0);
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Log("%04x CompactMem(%08x)\n", trap, cbNeeded);
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SetMemError(0);
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return mplite_maxmem(&pool);
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}
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uint32_t MaxMem(uint16_t trap)
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{
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// return largest contiguous free block size.
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/*
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* on entry:
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* (nothing)
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*
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* on exit:
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* D0: function result (long word)
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*
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*/
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Log("%04x MaxMem()\n", trap);
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SetMemError(0);
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return mplite_maxmem(&pool);
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}
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uint32_t MaxBlock(uint16_t trap)
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{
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/*
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* The MaxBlock function returns the maximum contiguous space, in bytes, that you
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* could obtain after compacting the current heap zone. MaxBlock does not actually
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* do the compaction.
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*/
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/*
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* on entry:
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* (nothing)
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*
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* on exit:
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* D0: function result (long word)
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*
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*/
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Log("%04x MaxBlock()\n", trap);
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SetMemError(0);
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return mplite_maxmem(&pool);
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}
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uint32_t FreeMem(uint16_t trap)
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{
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// total free memory.
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/*
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* on entry:
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* (nothing)
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*
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* on exit:
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* D0: function result (long word)
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*
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*/
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Log("%04x FreeMem()\n", trap);
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SetMemError(0);
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return mplite_freemem(&pool);
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}
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uint16_t ReserveMem(uint16_t trap)
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{
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/*
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* on entry:
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* D0: cbNeeded (long word)
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*
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* on exit:
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* D0: Result code.
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*
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*/
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uint32_t cbNeeded = cpuGetDReg(0);
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uint32_t available;
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Log("%04x ReserveMem($%08x)\n", trap, cbNeeded);
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available = mplite_maxmem(&pool);
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// TODO -- if available < cbNeeded, purge handle and retry?
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if (available < cbNeeded) return SetMemError(MacOS::memFullErr);
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return SetMemError(0);
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}
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uint16_t MoveHHi(uint16_t trap)
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{
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/*
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* on entry:
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* A0: Handle to move
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*
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* on exit:
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* D0: Result code.
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*
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*/
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uint32_t theHandle = cpuGetAReg(0);
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Log("%04x MoveHHi(%08x)\n", trap, theHandle);
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// check if it's valid.
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auto iter = HandleMap.find(theHandle);
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if (iter == HandleMap.end()) return SetMemError(MacOS::memWZErr);
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return SetMemError(0);
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}
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uint32_t StackSpace(uint16_t trap)
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{
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/*
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* on entry:
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*
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* on exit:
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* D0: Number of bytes between stack and heap
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*
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*/
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uint32_t sp = cpuGetAReg(7);
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Log("%04x StackSpace(%08x)\n", trap);
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SetMemError(0);
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// find the pointer base...
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// todo -- call lower bound, then iter-- ?
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for (const auto & iter : PtrMap)
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{
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if (sp >= iter.first && sp < iter.first + iter.second)
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{
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return sp - iter.first;
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}
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}
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return 0;
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}
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#pragma mark Pointers
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uint16_t NewPtr(uint16_t trap)
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{
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/*
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* on entry:
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* D0 Number of logical bytes requested
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*
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* on exit:
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* A0 Address of the new block or NIL
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* D0 Result code
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*
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*/
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bool clear = trap & (1 << 9);
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//bool sys = trap & (1 << 10);
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uint32_t size = cpuGetDReg(0);
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Log("%04x NewPtr(%08x)\n", trap, size);
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// todo -- separate pools for sys vs non-sys?
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// todo -- NewPtr(0) -- null or empty ptr?
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uint32_t mcptr;
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uint16_t error;
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error = Native::NewPtr(size, clear, mcptr);
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cpuSetAReg(0, mcptr);
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return error; //SetMemError(error);
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}
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uint16_t DisposePtr(uint16_t trap)
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{
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/*
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* on entry:
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* A0 Pointer to the nonrelocatable block to be disposed of
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*
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* on exit:
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* D0 Result code
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*
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*/
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uint32_t mcptr = cpuGetAReg(0);
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Log("%04x DisposePtr(%08x)\n", trap, mcptr);
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uint16_t error;
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error = Native::DisposePtr(mcptr);
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return error; //SetMemError(error);
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}
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uint32_t GetPtrSize(uint16_t trap)
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{
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/*
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* on entry:
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* A0 pointer
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*
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* on exit:
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* D0 size (32-bit) or error code
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*
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*/
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uint32_t mcptr = cpuGetAReg(0);
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Log("%08x GetPtrSize(%08x)\n", trap, mcptr);
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auto iter = PtrMap.find(mcptr);
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if (iter == PtrMap.end()) return SetMemError(MacOS::memWZErr);
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return iter->second;
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}
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uint16_t SetPtrSize(uint16_t trap)
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{
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/*
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* on entry:
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* A0 pointer
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* D0 new size
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*
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* on exit:
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* D0 Result code
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*
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*/
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uint32_t mcptr = cpuGetAReg(0);
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uint32_t newSize = cpuGetDReg(0);
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Log("%08x SetPtrSize(%08x, %08x)\n", trap, mcptr, newSize);
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auto iter = PtrMap.find(mcptr);
|
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|
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if (iter == PtrMap.end()) return SetMemError(MacOS::memWZErr);
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||
|
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uint8_t *ptr = mcptr + Memory;
|
||
|
||
if (mplite_resize(&pool, ptr, newSize) < 0)
|
||
{
|
||
return SetMemError(MacOS::memFullErr);
|
||
}
|
||
|
||
// update the size.
|
||
iter->second = newSize;
|
||
|
||
return SetMemError(0);
|
||
}
|
||
|
||
#pragma mark Handles
|
||
|
||
uint16_t NewHandle(uint16_t trap)
|
||
{
|
||
/*
|
||
* on entry:
|
||
* D0 Number of logical bytes requested
|
||
*
|
||
* on exit:
|
||
* A0 Address of the new handle or NIL
|
||
* D0 Result code
|
||
*
|
||
*/
|
||
|
||
uint32_t hh = 0;
|
||
uint16_t error;
|
||
|
||
bool clear = trap & (1 << 9);
|
||
//bool sys = trap & (1 << 10);
|
||
|
||
uint32_t size = cpuGetDReg(0);
|
||
|
||
Log("%04x NewHandle(%08x)\n", trap, size);
|
||
|
||
error = Native::NewHandle(size, clear, hh);
|
||
|
||
cpuSetAReg(0, hh);
|
||
return error;
|
||
}
|
||
|
||
uint16_t DisposeHandle(uint16_t trap)
|
||
{
|
||
/*
|
||
* on entry:
|
||
* A0 Handle to be disposed of
|
||
*
|
||
* on exit:
|
||
* D0 Result code
|
||
*
|
||
*/
|
||
|
||
uint32_t hh = cpuGetAReg(0);
|
||
|
||
Log("%04x DisposeHandle(%08x)\n", trap, hh);
|
||
|
||
return Native::DisposeHandle(hh);
|
||
}
|
||
|
||
uint16_t EmptyHandle(uint16_t trap)
|
||
{
|
||
/*
|
||
* on entry:
|
||
* A0 Handle to be disposed of
|
||
*
|
||
* on exit:
|
||
* D0 Result code
|
||
*
|
||
*/
|
||
|
||
uint32_t hh = cpuGetAReg(0);
|
||
Log("%04x EmptyHandle(%08x)\n", trap, hh);
|
||
|
||
auto iter = HandleMap.find(hh);
|
||
|
||
if (iter == HandleMap.end()) return SetMemError(MacOS::memWZErr);
|
||
|
||
auto &info = iter->second;
|
||
if (info.address == 0) return SetMemError(0);
|
||
if (info.locked) return SetMemError(MacOS::memLockedErr); // ?
|
||
|
||
void *address = Memory + info.address;
|
||
|
||
mplite_free(&pool, address);
|
||
|
||
info.address = 0;
|
||
info.size = 0;
|
||
|
||
memoryWriteLong(0, hh);
|
||
return 0;
|
||
}
|
||
|
||
/*
|
||
* ReallocHandle (h: Handle; logicalSize: Size);
|
||
*
|
||
* ReallocHandle allocates a new relocatable block with a logical
|
||
* size of logicalSize bytes. It then updates handle h by setting
|
||
* its master pointer to point to the new block. The main use of
|
||
* this procedure is to reallocate space for a block that has
|
||
* been purged. Normally h is an empty handle, but it need not
|
||
* be: If it points to an existing block, that block is released
|
||
* before the new block is created.
|
||
*
|
||
* In case of an error, no new block is allocated and handle h is
|
||
* left unchanged.
|
||
*/
|
||
uint16_t ReallocHandle(uint16_t trap)
|
||
{
|
||
/*
|
||
* on entry:
|
||
* A0 Handle to be disposed of
|
||
* D0 Logical Size
|
||
*
|
||
* on exit:
|
||
* D0 Result code
|
||
*
|
||
*/
|
||
|
||
uint32_t hh = cpuGetAReg(0);
|
||
uint32_t logicalSize = cpuGetDReg(0);
|
||
|
||
Log("%04x ReallocHandle(%08x, %08x)\n", trap, hh, logicalSize);
|
||
|
||
auto iter = HandleMap.find(hh);
|
||
|
||
if (iter == HandleMap.end()) return SetMemError(MacOS::memWZErr);
|
||
|
||
auto& info = iter->second;
|
||
|
||
if (info.locked) return SetMemError(MacOS::memLockedErr);
|
||
|
||
if (info.address)
|
||
{
|
||
void *address = Memory + info.address;
|
||
|
||
mplite_free(&pool, address);
|
||
|
||
info.address = 0;
|
||
info.size = 0;
|
||
memoryWriteLong(0, hh);
|
||
}
|
||
|
||
// allocate a new block...
|
||
if (logicalSize == 0) return SetMemError(0);
|
||
|
||
void *address = mplite_malloc(&pool, logicalSize);
|
||
if (!address) return SetMemError(MacOS::memFullErr);
|
||
|
||
uint32_t mcptr = (uint8_t *)address - Memory;
|
||
|
||
info.size = logicalSize;
|
||
info.address = mcptr;
|
||
|
||
memoryWriteLong(mcptr, hh);
|
||
|
||
// lock? clear purged flag?
|
||
|
||
return 0;
|
||
}
|
||
|
||
|
||
uint32_t GetHandleSize(uint16_t trap)
|
||
{
|
||
/*
|
||
* on entry:
|
||
* A0 handle
|
||
*
|
||
* on exit:
|
||
* D0 size (32-bit) or error code
|
||
*
|
||
*/
|
||
|
||
uint32_t hh = cpuGetAReg(0);
|
||
|
||
Log("%08x GetHandleSize(%08x)\n", trap, hh);
|
||
|
||
auto iter = HandleMap.find(hh);
|
||
|
||
if (iter == HandleMap.end()) return SetMemError(MacOS::memWZErr);
|
||
|
||
return iter->second.size;
|
||
}
|
||
|
||
uint16_t SetHandleSize(uint16_t trap)
|
||
{
|
||
|
||
/*
|
||
* on entry:
|
||
* A0 pointer
|
||
* D0 new size
|
||
*
|
||
* on exit:
|
||
* D0 Result code
|
||
*
|
||
*/
|
||
|
||
|
||
uint32_t hh = cpuGetAReg(0);
|
||
uint32_t newSize = cpuGetDReg(0);
|
||
|
||
Log("%04x SetHandleSize(%08x, %08x)\n", trap, hh, newSize);
|
||
|
||
auto iter = HandleMap.find(hh);
|
||
|
||
if (iter == HandleMap.end()) return SetMemError(MacOS::memWZErr);
|
||
// todo -- if handle ptr is null, other logic?
|
||
// todo -- if locked, can't move.
|
||
|
||
auto &info = iter->second;
|
||
|
||
// 0 - no change in size.
|
||
if (info.size == newSize) return SetMemError(0);
|
||
|
||
uint32_t mcptr = info.address;
|
||
uint8_t *ptr = mcptr + Memory;
|
||
|
||
|
||
// 1. - resizing to 0.
|
||
if (!newSize)
|
||
{
|
||
if (info.locked) return SetMemError(MacOS::memLockedErr);
|
||
|
||
mplite_free(&pool, ptr);
|
||
info.address = 0;
|
||
info.size = 0;
|
||
|
||
memoryWriteLong(info.address, hh);
|
||
return SetMemError(0);
|
||
}
|
||
|
||
// 2. - resizing from 0.
|
||
|
||
if (!mcptr)
|
||
{
|
||
if (info.locked) return SetMemError(MacOS::memLockedErr);
|
||
|
||
ptr = (uint8_t *)mplite_malloc(&pool, newSize);
|
||
if (!ptr) return SetMemError(MacOS::memFullErr);
|
||
|
||
mcptr = ptr - Memory;
|
||
info.address = mcptr;
|
||
info.size = newSize;
|
||
|
||
memoryWriteLong(info.address, hh);
|
||
return SetMemError(0);
|
||
}
|
||
|
||
for (unsigned i = 0; i < 2; ++i)
|
||
{
|
||
|
||
// 3. - locked
|
||
if (info.locked)
|
||
{
|
||
if (mplite_resize(&pool, ptr, mplite_roundup(&pool, newSize)) == MPLITE_OK)
|
||
{
|
||
info.size = newSize;
|
||
return SetMemError(0);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
|
||
// 4. - resize.
|
||
|
||
ptr = (uint8_t *)mplite_realloc(&pool, ptr, mplite_roundup(&pool, newSize));
|
||
|
||
if (ptr)
|
||
{
|
||
mcptr = ptr - Memory;
|
||
info.address = mcptr;
|
||
info.size = newSize;
|
||
|
||
memoryWriteLong(info.address, hh);
|
||
return SetMemError(0);
|
||
}
|
||
|
||
}
|
||
|
||
fprintf(stderr, "mplite_realloc failed.\n");
|
||
Native::PrintMemoryStats();
|
||
|
||
|
||
if (i > 0) return SetMemError(MacOS::memFullErr);
|
||
|
||
// purge...
|
||
for (auto & kv : HandleMap)
|
||
{
|
||
uint32_t handle = kv.first;
|
||
auto &info = kv.second;
|
||
|
||
if (handle == hh) continue;
|
||
if (info.size && info.purgeable && !info.locked)
|
||
{
|
||
mplite_free(&pool, Memory + info.address);
|
||
info.size = 0;
|
||
info.address = 0;
|
||
|
||
// also need to update memory
|
||
memoryWriteLong(0, handle);
|
||
}
|
||
}
|
||
|
||
}
|
||
|
||
return SetMemError(MacOS::memFullErr);
|
||
}
|
||
|
||
|
||
#pragma mark Handle attributes
|
||
|
||
// these are all nops for now.
|
||
|
||
uint16_t HPurge(uint16_t trap)
|
||
{
|
||
/*
|
||
* on entry:
|
||
* A0 Handle
|
||
*
|
||
* on exit:
|
||
* D0 Result code
|
||
*
|
||
*/
|
||
|
||
|
||
uint32_t hh = cpuGetAReg(0);
|
||
|
||
Log("%04x HPurge(%08x)\n", trap, hh);
|
||
|
||
auto iter = HandleMap.find(hh);
|
||
|
||
if (iter == HandleMap.end()) return SetMemError(MacOS::memWZErr);
|
||
iter->second.purgeable = true;
|
||
|
||
return SetMemError(0);
|
||
}
|
||
|
||
uint16_t HLock(uint16_t trap)
|
||
{
|
||
/*
|
||
* on entry:
|
||
* A0 Handle
|
||
*
|
||
* on exit:
|
||
* D0 Result code
|
||
*
|
||
*/
|
||
|
||
uint32_t hh = cpuGetAReg(0);
|
||
|
||
Log("%04x HLock(%08x)\n", trap, hh);
|
||
|
||
auto iter = HandleMap.find(hh);
|
||
|
||
if (iter == HandleMap.end()) return SetMemError(MacOS::memWZErr);
|
||
|
||
iter->second.locked = true;
|
||
return SetMemError(0);
|
||
}
|
||
|
||
uint16_t HUnlock(uint16_t trap)
|
||
{
|
||
/*
|
||
* on entry:
|
||
* A0 Handle
|
||
*
|
||
* on exit:
|
||
* D0 Result code
|
||
*
|
||
*/
|
||
|
||
uint32_t hh = cpuGetAReg(0);
|
||
|
||
Log("%04x HUnlock(%08x)\n", trap, hh);
|
||
|
||
auto iter = HandleMap.find(hh);
|
||
|
||
if (iter == HandleMap.end()) return SetMemError(MacOS::memWZErr);
|
||
|
||
iter->second.locked = false;
|
||
return SetMemError(0);
|
||
}
|
||
|
||
#pragma mark - OS Utility Routines
|
||
|
||
uint16_t PtrToHand(uint16_t trap)
|
||
{
|
||
/*
|
||
* on entry:
|
||
* A0 source Pointer
|
||
* D0 size
|
||
*
|
||
* on exit:
|
||
* A0 destination pointer
|
||
* D0 Result code
|
||
*
|
||
*/
|
||
|
||
uint32_t mcptr = cpuGetAReg(0);
|
||
uint32_t size = cpuGetDReg(0);
|
||
|
||
Log("%04x PtrToHand(%08x, %08x)\n", trap, mcptr, size);
|
||
|
||
uint32_t destHandle;
|
||
uint32_t destPtr;
|
||
uint32_t d0 = Native::NewHandle(size, false, destHandle, destPtr);
|
||
if (d0 == 0)
|
||
{
|
||
std::memmove(memoryPointer(destPtr), memoryPointer(mcptr), size);
|
||
}
|
||
|
||
cpuSetAReg(0, destHandle);
|
||
return d0; // SetMemError called by Native::NewHandle.
|
||
}
|
||
|
||
|
||
#pragma mark -
|
||
uint32_t StripAddress(uint16_t trap)
|
||
{
|
||
/*
|
||
* on entry:
|
||
* d0 Address to strip
|
||
*
|
||
* on exit:
|
||
* D0 Address that has been stripped.
|
||
*
|
||
*/
|
||
|
||
// TODO -- in 32-bit mode, this is a nop.
|
||
// have a --24 / --32 flag?
|
||
|
||
uint32_t address = cpuGetDReg(0);
|
||
|
||
Log("%04x StripAddress(%08x)\n", trap, address);
|
||
|
||
address &= 0x00ffffff;
|
||
return address;
|
||
}
|
||
|
||
#pragma mark - zone
|
||
uint16_t HandleZone(uint16_t trap)
|
||
{
|
||
// FUNCTION HandleZone (h: Handle): THz;
|
||
/*
|
||
* on entry:
|
||
* A0 Handle whose zone is to be found
|
||
*
|
||
* on exit:
|
||
* A0 Pointer to handle’s heap zone
|
||
* D0 Result code
|
||
*
|
||
*/
|
||
|
||
uint32_t h = cpuGetAReg(0);
|
||
|
||
Log("%04x HandleZone(%08x)\n", trap, h);
|
||
|
||
|
||
if (HandleMap.find(h) == HandleMap.end())
|
||
{
|
||
cpuSetAReg(0, 0);
|
||
return SetMemError(MacOS::memWZErr);
|
||
}
|
||
|
||
cpuSetAReg(0, 0);
|
||
return SetMemError(0);
|
||
}
|
||
|
||
|
||
uint16_t GetZone(uint16_t trap)
|
||
{
|
||
// FUNCTION GetZone: THz;
|
||
|
||
/*
|
||
* on entry:
|
||
*
|
||
* on exit:
|
||
* A0 Pointer to current heap zone
|
||
* D0 Result code
|
||
*/
|
||
|
||
Log("%04x GetZone()\n", trap);
|
||
|
||
cpuSetAReg(0, 0);
|
||
return 0;
|
||
}
|
||
|
||
uint16_t SetZone(uint16_t trap)
|
||
{
|
||
// PROCEDURE SetZone (hz: THz);
|
||
|
||
/*
|
||
* on entry:
|
||
* A0 Pointer to new current heap zone
|
||
*
|
||
* on exit:
|
||
* D0 Result code
|
||
*/
|
||
|
||
uint32_t THz = cpuGetAReg(0);
|
||
Log("%04x SetZone(%08x)\n", trap, THz);
|
||
|
||
return 0;
|
||
}
|
||
|
||
} |