408 lines
14 KiB
C
408 lines
14 KiB
C
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/*++
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Copyright (c) 2000 Microsoft Corporation
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Module Name:
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context.c
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Abstract:
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Context conversion routines for ia64 hardware to ia32 context records
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Author:
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03-Feb-2000 Charles Spriakis - Intel (v-cspira)
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Revision History:
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--*/
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#define _WOW64CPUAPI_
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#ifdef _X86_
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#include "ia6432.h"
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#else
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#include <nt.h>
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#include <ntrtl.h>
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#include <nturtl.h>
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#include "wow64.h"
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#include "wow64cpu.h"
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#include "amd64cpu.h"
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#endif
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//
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// This is to prevent this library from linking to wow64 to use wow64!Wow64LogPrint
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//
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#if defined(LOGPRINT)
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#undef LOGPRINT
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#endif
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#define LOGPRINT(_x_) CpupDebugPrint _x_
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VOID
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CpupDebugPrint(
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IN ULONG_PTR Flags,
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IN PCHAR Format,
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...);
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ASSERTNAME;
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VOID
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Wow64CtxFromIa64(
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IN ULONG Ia32ContextFlags,
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IN PCONTEXT ContextIa64,
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IN OUT PCONTEXT32 ContextX86
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)
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/*++
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Routine Description:
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This function copies the context from an ia64 context record into
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the context of an ia32 record (based on the hardware iVE register
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mappings). This function is ment to be easily usabale by various
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get/set context routines (such as those exported by wow64cpu.dll).
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Arguments:
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Ia32ContextFlags - Specifies which ia32 context to copy
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ContextIa64 - Supplies an the ia64 context buffer that is the source
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for the copy into the ia32 context area
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ContextX86 - This is an X86 context which will receive the context
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information from the ia64 context record passed in above
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Return Value:
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None.
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--*/
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{
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#if 0
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FLOAT128 tmpFloat[NUMBER_OF_387REGS];
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if (Ia32ContextFlags & CONTEXT_IA64) {
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LOGPRINT((ERRORLOG, "Wow64CtxFromIa64: Request with ia64 context flags (0x%x) FAILED\n", Ia32ContextFlags));
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ASSERT((Ia32ContextFlags & CONTEXT_IA64) == 0);
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}
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if ((Ia32ContextFlags & CONTEXT32_CONTROL) == CONTEXT32_CONTROL) {
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//
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// And the control stuff
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//
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ContextX86->Ebp = (ULONG)ContextIa64->IntTeb;
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ContextX86->SegCs = KGDT_R3_CODE|3;
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ContextX86->Eip = (ULONG)ContextIa64->StIIP;
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ContextX86->SegSs = KGDT_R3_DATA|3;
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ContextX86->Esp = (ULONG)ContextIa64->IntSp;
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ContextX86->EFlags = (ULONG)ContextIa64->Eflag;
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}
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if ((Ia32ContextFlags & CONTEXT32_INTEGER) == CONTEXT32_INTEGER) {
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//
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// Now for the integer state...
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//
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ContextX86->Edi = (ULONG)ContextIa64->IntT6;
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ContextX86->Esi = (ULONG)ContextIa64->IntT5;
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ContextX86->Ebx = (ULONG)ContextIa64->IntT4;
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ContextX86->Edx = (ULONG)ContextIa64->IntT3;
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ContextX86->Ecx = (ULONG)ContextIa64->IntT2;
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ContextX86->Eax = (ULONG)ContextIa64->IntV0;
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}
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if ((Ia32ContextFlags & CONTEXT32_SEGMENTS) == CONTEXT32_SEGMENTS) {
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//
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// These are constants (and constants are used on ia32->ia64
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// transition, not saved values) so make our life easy...
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//
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ContextX86->SegGs = KGDT_R3_DATA|3;
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ContextX86->SegEs = KGDT_R3_DATA|3;
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ContextX86->SegDs = KGDT_R3_DATA|3;
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ContextX86->SegSs = KGDT_R3_DATA|3;
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ContextX86->SegFs = KGDT_R3_TEB|3;
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ContextX86->SegCs = KGDT_R3_CODE|3;
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}
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if ((Ia32ContextFlags & CONTEXT32_EXTENDED_REGISTERS) == CONTEXT32_EXTENDED_REGISTERS) {
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PFXSAVE_FORMAT_WX86 xmmi = (PFXSAVE_FORMAT_WX86) ContextX86->ExtendedRegisters;
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LOGPRINT((TRACELOG, "Wow64CtxFromIa64: Request to convert extended fp registers\n"));
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xmmi->ControlWord = (USHORT)(ContextIa64->StFCR & 0xffff);
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xmmi->StatusWord = (USHORT)(ContextIa64->StFSR & 0xffff);
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xmmi->TagWord = (USHORT)(ContextIa64->StFSR >> 16) & 0xffff;
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xmmi->ErrorOpcode = (USHORT)(ContextIa64->StFIR >> 48);
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xmmi->ErrorOffset = (ULONG) (ContextIa64->StFIR & 0xffffffff);
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xmmi->ErrorSelector = (ULONG) (ContextIa64->StFIR >> 32);
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xmmi->DataOffset = (ULONG) (ContextIa64->StFDR & 0xffffffff);
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xmmi->DataSelector = (ULONG) (ContextIa64->StFDR >> 32);
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xmmi->MXCsr = (ULONG) (ContextIa64->StFCR >> 32) & 0xffff;
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//
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// Copy over the FP registers. Even though this is the new
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// FXSAVE format with 16-bytes for each register, need to
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// convert from spill/fill format to 80-byte double extended format
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//
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Wow64CopyIa64FromSpill((PFLOAT128) &(ContextIa64->FltT2),
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(PFLOAT128) xmmi->RegisterArea,
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NUMBER_OF_387REGS);
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//
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// Rotate the registers appropriately
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//
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Wow64RotateFpTop(ContextIa64->StFSR, (PFLOAT128) xmmi->RegisterArea);
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//
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// Finally copy the xmmi registers
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//
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Wow64CopyXMMIFromIa64Byte16(&(ContextIa64->FltS4),
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xmmi->Reserved3,
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NUMBER_OF_XMMI_REGS);
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}
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if ((Ia32ContextFlags & CONTEXT32_FLOATING_POINT) == CONTEXT32_FLOATING_POINT) {
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LOGPRINT((TRACELOG, "Wow64CtxFromIa64: Request to convert fp registers\n"));
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//
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// Copy over the floating point status/control stuff
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//
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ContextX86->FloatSave.ControlWord = (ULONG)(ContextIa64->StFCR & 0xffff);
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ContextX86->FloatSave.StatusWord = (ULONG)(ContextIa64->StFSR & 0xffff);
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ContextX86->FloatSave.TagWord = (ULONG)(ContextIa64->StFSR >> 16) & 0xffff;
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ContextX86->FloatSave.ErrorOffset = (ULONG)(ContextIa64->StFIR & 0xffffffff);
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ContextX86->FloatSave.ErrorSelector = (ULONG)(ContextIa64->StFIR >> 32);
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ContextX86->FloatSave.DataOffset = (ULONG)(ContextIa64->StFDR & 0xffffffff);
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ContextX86->FloatSave.DataSelector = (ULONG)(ContextIa64->StFDR >> 32);
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//
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// Copy over the FP registers into temporary space
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// Even though this is the new
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// FXSAVE format with 16-bytes for each register, need to
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// convert from spill/fill format to 80-byte double extended format
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//
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Wow64CopyIa64FromSpill((PFLOAT128) &(ContextIa64->FltT2),
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(PFLOAT128) tmpFloat,
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NUMBER_OF_387REGS);
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//
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// Rotate the registers appropriately
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//
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Wow64RotateFpTop(ContextIa64->StFSR, tmpFloat);
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//
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// And put them in the older FNSAVE format (packed 10 byte values)
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//
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Wow64CopyFpFromIa64Byte16(tmpFloat,
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ContextX86->FloatSave.RegisterArea,
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NUMBER_OF_387REGS);
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}
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if ((Ia32ContextFlags & CONTEXT32_DEBUG_REGISTERS) == CONTEXT32_DEBUG_REGISTERS) {
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LOGPRINT((TRACELOG, "Wow64CtxFromIa64: Request to convert debug registers\n"));
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}
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ContextX86->ContextFlags = Ia32ContextFlags;
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#endif
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}
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VOID
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Wow64CtxToIa64(
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IN ULONG Ia32ContextFlags,
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IN PCONTEXT32 ContextX86,
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IN OUT PCONTEXT ContextIa64
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)
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/*++
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Routine Description:
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This function copies the context from an ia32 context record into
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the context of an ia64 record (based on the hardware iVE register
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mappings). This function is ment to be easily usabale by various
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get/set context routines (such as those exported by wow64cpu.dll).
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Arguments:
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Ia32ContextFlags - Specifies which ia32 context to copy
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ContextX86 - Supplies an the X86 context buffer that is the source
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for the copy into the ia64 context area
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ContextIa64 - This is an ia64 context which will receive the context
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information from the x86 context record passed in above
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Return Value:
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None.
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--*/
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{
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#if 0
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FLOAT128 tmpFloat[NUMBER_OF_387REGS];
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if (Ia32ContextFlags & CONTEXT_IA64) {
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LOGPRINT((ERRORLOG, "Wow64CtxToIa64: Request with ia64 context flags (0x%x) FAILED\n", Ia32ContextFlags));
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ASSERT((Ia32ContextFlags & CONTEXT_IA64) == 0);
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}
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if ((Ia32ContextFlags & CONTEXT32_CONTROL) == CONTEXT32_CONTROL) {
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//
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// And the control stuff
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//
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ContextIa64->IntTeb = ContextX86->Ebp;
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ContextIa64->StIIP = ContextX86->Eip;
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ContextIa64->IntSp = ContextX86->Esp;
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ContextIa64->Eflag = ContextX86->EFlags;
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//
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// The segments (cs and ds) are a constant, so reset them.
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// gr17 has LDT and TSS, so might as well reset
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// all of them while we're at it...
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// These values are forced in during a transition (see simulate.s)
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// so there is no point to trying to get cute and actually
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// pass in the values from the X86 context record
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//
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ContextIa64->IntT8 = ((KGDT_LDT|3) << 32)
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| ((KGDT_R3_DATA|3) << 16)
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| (KGDT_R3_CODE|3);
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}
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if ((Ia32ContextFlags & CONTEXT32_INTEGER) == CONTEXT32_INTEGER) {
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//
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// Now for the integer state...
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//
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ContextIa64->IntT6 = ContextX86->Edi;
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ContextIa64->IntT5 = ContextX86->Esi;
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ContextIa64->IntT4 = ContextX86->Ebx;
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ContextIa64->IntT3 = ContextX86->Edx;
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ContextIa64->IntT2 = ContextX86->Ecx;
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ContextIa64->IntV0 = ContextX86->Eax;
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}
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if ((Ia32ContextFlags & CONTEXT32_SEGMENTS) == CONTEXT32_SEGMENTS) {
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//
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// These are constants (and constants are used on ia32->ia64
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// transition, not saved values) so make our life easy...
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// These values are forced in during a transition (see simulate.s)
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// so there is no point to trying to get cute and actually
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// pass in the values from the X86 context record
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//
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ContextIa64->IntT7 = ((KGDT_R3_DATA|3) << 48)
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| ((KGDT_R3_TEB|3) << 32)
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| ((KGDT_R3_DATA|3) << 16)
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| (KGDT_R3_DATA|3);
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}
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if ((Ia32ContextFlags & CONTEXT32_EXTENDED_REGISTERS) == CONTEXT32_EXTENDED_REGISTERS) {
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PFXSAVE_FORMAT_WX86 xmmi = (PFXSAVE_FORMAT_WX86) ContextX86->ExtendedRegisters;
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LOGPRINT((TRACELOG, "Wow64CtxToIa64: Request to convert extended fp registers\n"));
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//
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// And copy over the floating point status/control stuff
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//
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ContextIa64->StFCR = (ContextIa64->StFCR & 0xffffffffffffe040i64) |
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(xmmi->ControlWord & 0xffff) |
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((xmmi->MXCsr & 0xffff) << 32);
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ContextIa64->StFSR = (ContextIa64->StFSR & 0xffffffff00000000i64) |
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(xmmi->StatusWord & 0xffff) |
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((xmmi->TagWord & 0xffff) << 16);
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ContextIa64->StFIR = (xmmi->ErrorOffset & 0xffffffff) |
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(xmmi->ErrorSelector << 32);
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ContextIa64->StFDR = (xmmi->DataOffset & 0xffffffff) |
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(xmmi->DataSelector << 32);
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//
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// Rotate registers back
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//
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{
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ULONGLONG RotateFSR = (NUMBER_OF_387REGS -
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((ContextIa64->StFSR >> 11) & 0x7)) << 11;
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Wow64RotateFpTop(RotateFSR, (PFLOAT128) xmmi->RegisterArea);
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}
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// Copy over the FP registers. Even though this is the new
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// FXSAVE format with 16-bytes for each register, need to
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// convert to spill/fill format from 80-byte double extended format
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//
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Wow64CopyIa64ToFill((PFLOAT128) xmmi->RegisterArea,
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(PFLOAT128) &(ContextIa64->FltT2),
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NUMBER_OF_387REGS);
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//
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// Copy over the xmmi registers and convert them into a format
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// that spill/fill can use
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//
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Wow64CopyXMMIToIa64Byte16(xmmi->Reserved3,
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&(ContextIa64->FltS4),
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NUMBER_OF_XMMI_REGS);
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}
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if ((Ia32ContextFlags & CONTEXT32_FLOATING_POINT) == CONTEXT32_FLOATING_POINT) {
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LOGPRINT((TRACELOG, "Wow64CtxToIa64: Request to convert fp registers\n"));
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//
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// Copy over the floating point status/control stuff
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// Leave the MXCSR stuff alone
|
||
|
|
//
|
||
|
|
ContextIa64->StFCR = (ContextIa64->StFCR & 0xffffffffffffe040i64) |
|
||
|
|
(ContextX86->FloatSave.ControlWord & 0xffff);
|
||
|
|
|
||
|
|
ContextIa64->StFSR = (ContextIa64->StFSR & 0xffffffff00000000i64) |
|
||
|
|
(ContextX86->FloatSave.StatusWord & 0xffff) |
|
||
|
|
((ContextX86->FloatSave.TagWord & 0xffff) << 16);
|
||
|
|
|
||
|
|
ContextIa64->StFIR = (ContextX86->FloatSave.ErrorOffset & 0xffffffff) |
|
||
|
|
(ContextX86->FloatSave.ErrorSelector << 32);
|
||
|
|
|
||
|
|
ContextIa64->StFDR = (ContextX86->FloatSave.DataOffset & 0xffffffff) |
|
||
|
|
(ContextX86->FloatSave.DataSelector << 32);
|
||
|
|
|
||
|
|
|
||
|
|
//
|
||
|
|
// Copy over the FP registers from packed 10-byte format
|
||
|
|
// to 16-byte format
|
||
|
|
//
|
||
|
|
Wow64CopyFpToIa64Byte16(ContextX86->FloatSave.RegisterArea,
|
||
|
|
tmpFloat,
|
||
|
|
NUMBER_OF_387REGS);
|
||
|
|
|
||
|
|
//
|
||
|
|
// Rotate registers back
|
||
|
|
//
|
||
|
|
{
|
||
|
|
ULONGLONG RotateFSR = (NUMBER_OF_387REGS -
|
||
|
|
((ContextIa64->StFSR >> 11) & 0x7)) << 11;
|
||
|
|
Wow64RotateFpTop(RotateFSR, tmpFloat);
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Now convert from 80 byte extended format to fill/spill format
|
||
|
|
//
|
||
|
|
Wow64CopyIa64ToFill((PFLOAT128) tmpFloat,
|
||
|
|
(PFLOAT128) &(ContextIa64->FltT2),
|
||
|
|
NUMBER_OF_387REGS);
|
||
|
|
}
|
||
|
|
|
||
|
|
if ((Ia32ContextFlags & CONTEXT32_DEBUG_REGISTERS) == CONTEXT32_DEBUG_REGISTERS) {
|
||
|
|
LOGPRINT((TRACELOG, "Wow64CtxToIa64: Request to convert debug registers\n"));
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
}
|