Palm OS Emulator v3.5HEADmain

Check in the Palm OS Emulator, version 3.5 (2001). These files come from
the tarball present in the Debian archives [1]. The SHA-256 digest of
the tarball, c5e0d23424e88525bfba0ecdf0a432a8d93c885d04740df06a9eeee44e5f25e4,
matches the digest preserved in the FreeBSD ports tree [2], giving
further confidence that these files are as distributed by upstream.

[1] http://archive.debian.org/debian/pool/contrib/p/pose/
[2] https://svnweb.freebsd.org/ports/head/palm/pose/distinfo?revision=271305&view=markup&pathrev=282162

1 files changed, 273 insertions, 0 deletions

diff --git a/SrcShared/EmLowMem.cpp b/SrcShared/EmLowMem.cpp
new file mode 100644
index 0000000..da7b366
--- /dev/null
+++ b/SrcShared/EmLowMem.cpp
@@ -0,0 +1,273 @@
+/* -*- mode: C++; tab-width: 4 -*- */
+/* ===================================================================== *\
+	Copyright (c) 2000-2001 Palm, Inc. or its subsidiaries.
+	All rights reserved.
+
+	This file is part of the Palm OS Emulator.
+
+	This program is free software; you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation; either version 2 of the License, or
+	(at your option) any later version.
+\* ===================================================================== */
+
+#include "EmCommon.h"
+#include "EmLowMem.h"
+
+#include "EmMemory.h"			// CEnableFullAccess
+#include "EmPalmFunction.h"		// SysTrapIndex
+#include "EmPatchState.h"		// EmPatchState::OSMajorVersion
+
+
+#include "PalmPack.h"
+#define NON_PORTABLE
+#include "SysEvtPrv.h"			// SysEvtMgrGlobalsType
+#undef NON_PORTABLE
+#include "PalmPackPop.h"
+
+
+EmAliasLowMemHdrType<PAS>	EmLowMem::fgLowMem (EmMemNULL);	
+
+
+#pragma mark -
+
+// ===========================================================================
+//		¥ EmLowMem
+// ===========================================================================
+
+static uint16		gSysDispatchTableSize;
+
+/***********************************************************************
+ *
+ * FUNCTION:	EmLowMem::Initialize
+ *
+ * DESCRIPTION: Standard initialization function.  Responsible for
+ *				initializing this sub-system when a new session is
+ *				created.  Will be followed by at least one call to
+ *				Reset or Load.
+ *
+ * PARAMETERS:	None.
+ *
+ * RETURNED:	Nothing.
+ *
+ ***********************************************************************/
+
+void EmLowMem::Initialize (void)
+{
+	gSysDispatchTableSize = 0;
+}
+
+
+/***********************************************************************
+ *
+ * FUNCTION:	EmLowMem::Reset
+ *
+ * DESCRIPTION: Standard reset function.  Sets the sub-system to a
+ *				default state.	This occurs not only on a Reset (as
+ *				from the menu item), but also when the sub-system
+ *				is first initialized (Reset is called after Initialize)
+ *				as well as when the system is re-loaded from an
+ *				insufficient session file.
+ *
+ * PARAMETERS:	None.
+ *
+ * RETURNED:	Nothing.
+ *
+ ***********************************************************************/
+
+void EmLowMem::Reset (void)
+{
+}
+
+
+/***********************************************************************
+ *
+ * FUNCTION:	EmLowMem::Save
+ *
+ * DESCRIPTION: Standard save function.  Saves any sub-system state to
+ *				the given session file.
+ *
+ * PARAMETERS:	None.
+ *
+ * RETURNED:	Nothing.
+ *
+ ***********************************************************************/
+
+void EmLowMem::Save (SessionFile&)
+{
+}
+
+
+/***********************************************************************
+ *
+ * FUNCTION:	EmLowMem::Load
+ *
+ * DESCRIPTION: Standard load function.  Loads any sub-system state
+ *				from the given session file.
+ *
+ * PARAMETERS:	None.
+ *
+ * RETURNED:	Nothing.
+ *
+ ***********************************************************************/
+
+void EmLowMem::Load (SessionFile&)
+{
+}
+
+
+/***********************************************************************
+ *
+ * FUNCTION:	EmLowMem::Dispose
+ *
+ * DESCRIPTION: Standard dispose function.	Completely release any
+ *				resources acquired or allocated in Initialize and/or
+ *				Load.
+ *
+ * PARAMETERS:	None.
+ *
+ * RETURNED:	Nothing.
+ *
+ ***********************************************************************/
+
+void EmLowMem::Dispose (void)
+{
+}
+
+
+/***********************************************************************
+ *
+ * FUNCTION:	EmLowMem::GetEvtMgrIdle
+ *
+ * DESCRIPTION: .
+ *
+ * PARAMETERS:	None.
+ *
+ * RETURNED:	Nothing.
+ *
+ ***********************************************************************/
+
+uint8 EmLowMem::GetEvtMgrIdle (void)
+{
+	CEnableFullAccess	munge;	// Remove blocks on memory access.
+
+	// First, get sysEvtMgrGlobalsP, which is a pointer in low-memory.
+
+	emuptr sysEvtMgrGlobalsP	= EmLowMem_GetGlobal (sysEvtMgrGlobalsP);
+
+	/*
+	**	Next look at the "idle" boolean in the SysEvtMgrGlobalsPtr
+	**	contained in sysEvtMgrGlobalsP:
+	**
+	**	struct SysEvtMgrGlobalsType
+	**	{
+	**		...
+	**		Boolean 		idle;
+	**		...
+	**	};
+	*/
+
+	size_t	idleOffset = offsetof (SysEvtMgrGlobalsType, idle);
+
+	// Under Palm OS 1.0, there was an extra 4-byte value at the
+	// location currently holding "gremlinsFlag", which is before
+	// the "idle" field.  Under that version of the OS, we therefore
+	// have to add 4 to get the right offset.
+
+	if (EmPatchState::OSMajorVersion () == 1)
+	{
+		idleOffset += sizeof (Int32);
+	}
+
+	uint8	idle = EmMemGet8 (sysEvtMgrGlobalsP + idleOffset);
+
+	return idle;
+}
+
+
+/***********************************************************************
+ *
+ * FUNCTION:	EmLowMem::TrapExists
+ *
+ * DESCRIPTION: .
+ *
+ * PARAMETERS:	None.
+ *
+ * RETURNED:	Nothing.
+ *
+ ***********************************************************************/
+
+Bool EmLowMem::TrapExists (uint16 iATrap)
+{
+#if 0
+	// No longer cache the dispatch table size.  Handspring changes the
+	// size of the dispatch table after the first system call, resulting
+	// in Poser caching the old table size, and thus complaining that
+	// some functions are not implemented when in fact they are.
+
+	// If we haven't already, get the number of traps in this system.
+
+	if (gSysDispatchTableSize == 0)
+	{
+		CEnableFullAccess	munge;	// Remove blocks on memory access.
+
+		gSysDispatchTableSize = EmLowMem_GetGlobal (sysDispatchTableSize);
+	}
+
+	return (::SysTrapIndex (iATrap) == ::SysTrapIndex (sysTrapHostControl)) ||
+			::SysTrapIndex (iATrap) < gSysDispatchTableSize;
+#else
+	CEnableFullAccess	munge;	// Remove blocks on memory access.
+	uint16				sysDispatchTableSize = EmLowMem_GetGlobal (sysDispatchTableSize);
+	return (::SysTrapIndex (iATrap) == ::SysTrapIndex (sysTrapHostControl)) ||
+			::SysTrapIndex (iATrap) < sysDispatchTableSize;
+#endif
+}
+
+
+/***********************************************************************
+ *
+ * FUNCTION:	EmLowMem::GetTrapAddress
+ *
+ * DESCRIPTION: .
+ *
+ * PARAMETERS:	None.
+ *
+ * RETURNED:	Nothing.
+ *
+ ***********************************************************************/
+
+emuptr EmLowMem::GetTrapAddress (uint16 iATrap)
+{
+	emuptr address = EmMemNULL;
+
+	CEnableFullAccess	munge;	// Remove blocks on memory access.
+
+	// If the trap number is not in range, just return NULL to signal
+	// that normal process of the TRAP $F should occur.
+
+//	uint16	sysDispatchTableSize = EmLowMem_GetGlobal (sysDispatchTableSize);
+	uint16	sysDispatchTableSize = EmMemGet16 (256 + 62);
+
+	iATrap = ::SysTrapIndex (iATrap);
+
+	if ((iATrap == ::SysTrapIndex (sysTrapHostControl)) ||
+		(iATrap < sysDispatchTableSize))
+	{
+		// Get sysDispatchTableP, which is a pointer in low-memory.
+
+//		uint32 sysDispatchTableP	= EmLowMem_GetGlobal (sysDispatchTableP);
+		uint32 sysDispatchTableP	= EmMemGet32 (256 + 34);
+
+		// If it's NULL, return NULL.
+
+		if (sysDispatchTableP != EmMemNULL)
+		{
+			// Next, get the right guy from its contents.
+
+			address = EmMemGet32 (sysDispatchTableP + iATrap * 4);
+		}
+	}
+
+	return address;
+}