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/* |
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* thunks.h - Thunks to share data and code with MacOS |
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* |
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* SheepShaver (C) 1997-2002 Christian Bauer and Marc Hellwig |
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* SheepShaver (C) 1997-2008 Christian Bauer and Marc Hellwig |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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NATIVE_VIDEO_INSTALL_ACCEL, |
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NATIVE_VIDEO_VBL, |
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NATIVE_VIDEO_DO_DRIVER_IO, |
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NATIVE_ETHER_AO_GET_HWADDR, |
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NATIVE_ETHER_AO_ADD_MULTI, |
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NATIVE_ETHER_AO_DEL_MULTI, |
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NATIVE_ETHER_AO_SEND_PACKET, |
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NATIVE_ETHER_IRQ, |
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NATIVE_ETHER_INIT, |
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NATIVE_ETHER_TERM, |
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NATIVE_R_GET_RESOURCE, |
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NATIVE_MAKE_EXECUTABLE, |
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NATIVE_CHECK_LOAD_INVOC, |
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NATIVE_SYNC_HOOK, |
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NATIVE_BITBLT_HOOK, |
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NATIVE_FILLRECT_HOOK, |
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NATIVE_BITBLT, |
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NATIVE_INVRECT, |
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NATIVE_FILLRECT, |
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NATIVE_NQD_SYNC_HOOK, |
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NATIVE_NQD_BITBLT_HOOK, |
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NATIVE_NQD_FILLRECT_HOOK, |
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NATIVE_NQD_UNKNOWN_HOOK, |
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NATIVE_NQD_BITBLT, |
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NATIVE_NQD_INVRECT, |
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NATIVE_NQD_FILLRECT, |
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NATIVE_NAMED_CHECK_LOAD_INVOC, |
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NATIVE_GET_NAMED_RESOURCE, |
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NATIVE_GET_1_NAMED_RESOURCE, |
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NATIVE_OP_MAX |
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}; |
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/* |
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* Helpers to share 32-bit addressable data with MacOS |
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* |
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* There are two distinct allocatable regions: |
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* |
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* - The Data region is used to share data between MacOS and |
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* SheepShaver. This is stack-like allocation since it is |
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* meant to only hold temporary data which dies at the end |
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* of the current function scope. |
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* |
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* - The Procedure region is used to hold permanent M68K or |
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* PowerPC code to assist native routine implementations. |
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* |
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* - The Procedure region grows up whereas the Data region |
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* grows down. They may intersect into the ZeroPage, which |
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* is a read-only page with all bits set to zero. In practise, |
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* the intersection is unlikely since the Procedure region is |
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* static and the Data region is meant to be small (< 256 KB). |
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*/ |
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class SheepMem { |
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static uint32 page_size; |
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static uintptr zero_page; |
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static uintptr base; |
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static uintptr top; |
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static const uint32 size = 0x40000; // 256 KB |
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static uintptr data; |
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static uintptr proc; |
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static const uint32 size = 0x80000; // 512 KB |
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public: |
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static bool Init(void); |
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static void Exit(void); |
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static uint32 ZeroPage(); |
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static uint32 Reserve(uint32 size); |
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static void Release(uint32 size); |
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static uint32 ReserveProc(uint32 size); |
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friend class SheepVar; |
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}; |
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inline uint32 SheepMem::Reserve(uint32 size) |
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{ |
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top -= align(size); |
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assert(top >= base); |
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return top; |
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data -= align(size); |
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assert(data >= proc); |
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return data; |
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} |
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inline void SheepMem::Release(uint32 size) |
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{ |
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top += align(size); |
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data += align(size); |
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} |
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inline uint32 SheepMem::ReserveProc(uint32 size) |
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{ |
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uint32 mproc = proc; |
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proc += align(size); |
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assert(proc < data); |
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return mproc; |
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} |
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|
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static inline uint32 SheepProc(const uint8 *proc, uint32 proc_size) |
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{ |
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uint32 mac_proc = SheepMem::ReserveProc(proc_size); |
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Host2Mac_memcpy(mac_proc, proc, proc_size); |
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return mac_proc; |
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} |
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|
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#define BUILD_SHEEPSHAVER_PROCEDURE(PROC) \ |
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static uint32 PROC = 0; \ |
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if (PROC == 0) \ |
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PROC = SheepProc(PROC##_template, sizeof(PROC##_template)) |
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|
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class SheepVar |
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{ |
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uint32 m_base; |
