SELMAll.cpp revision c97989161fbe75bc14cea477a5443bbf474dd3ad
/* $Id$ */
/** @file
* SELM All contexts.
*/
/*
* Copyright (C) 2006-2007 innotek GmbH
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* General Public License as published by the Free Software Foundation,
* in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
* distribution. VirtualBox OSE is distributed in the hope that it will
* be useful, but WITHOUT ANY WARRANTY of any kind.
*
* If you received this file as part of a commercial VirtualBox
* distribution, then only the terms of your commercial VirtualBox
* license agreement apply instead of the previous paragraph.
*/
/*******************************************************************************
* Header Files *
*******************************************************************************/
#define LOG_GROUP LOG_GROUP_SELM
#include "SELMInternal.h"
/**
* Converts a GC selector based address to a flat address.
*
* No limit checks are done. Use the SELMToFlat*() or SELMValidate*() functions
* for that.
*
* @returns Flat address.
* @param pVM VM Handle.
* @param Sel Selector part.
* @param Addr Address part.
*/
{
/** @todo check the limit. */
if (!(Sel & X86_SEL_LDT))
else
{
/** @todo handle LDT pages not present! */
#ifdef IN_GC
#else
#endif
}
}
/**
* Converts a GC selector based address to a flat address.
*
* No limit checks are done. Use the SELMToFlat*() or SELMValidate*() functions
* for that.
*
* @returns Flat address.
* @param pVM VM Handle.
* @param eflags Current eflags
* @param Sel Selector part.
* @param pHiddenSel Hidden selector register
* @param Addr Address part.
*/
SELMDECL(RTGCPTR) SELMToFlat(PVM pVM, X86EFLAGS eflags, RTSEL Sel, CPUMSELREGHID *pHiddenSel, RTGCPTR Addr)
{
/*
* Deal with real & v86 mode first.
*/
if ( CPUMIsGuestInRealMode(pVM)
{
if (CPUMAreHiddenSelRegsValid(pVM))
else
}
/** @todo when we're in 16 bits mode, we should cut off the address as well.. */
if (!CPUMAreHiddenSelRegsValid(pVM))
}
/**
* Converts a GC selector based address to a flat address.
*
* Some basic checking is done, but not all kinds yet.
*
* @returns VBox status
* @param pVM VM Handle.
* @param eflags Current eflags
* @param Sel Selector part.
* @param Addr Address part.
* @param pHiddenSel Hidden selector register (can be NULL)
* @param fFlags SELMTOFLAT_FLAGS_*
* GDT entires are valid.
* @param ppvGC Where to store the GC flat address.
* @param pcb Where to store the bytes from *ppvGC which can be accessed according to
* the selector. NULL is allowed.
*/
SELMDECL(int) SELMToFlatEx(PVM pVM, X86EFLAGS eflags, RTSEL Sel, RTGCPTR Addr, CPUMSELREGHID *pHiddenSel, unsigned fFlags, PRTGCPTR ppvGC, uint32_t *pcb)
{
/*
* Deal with real & v86 mode first.
*/
if ( CPUMIsGuestInRealMode(pVM)
{
if (ppvGC)
{
if ( pHiddenSel
else
}
if (pcb)
return VINF_SUCCESS;
}
/** @todo when we're in 16 bits mode, we should cut off the address as well.. */
if ( pHiddenSel
{
}
else
{
if (!(Sel & X86_SEL_LDT))
{
if ( !(fFlags & SELMTOFLAT_FLAGS_HYPER)
return VERR_INVALID_SELECTOR;
}
else
{
return VERR_INVALID_SELECTOR;
/** @todo handle LDT page(s) not present! */
#ifdef IN_GC
#else
#endif
}
/* calc limit. */
/* calc address assuming straight stuff. */
);
}
/*
* Check if present.
*/
if (u1Present)
{
/*
* Type check.
*/
#define BOTH(a, b) ((a << 16) | b)
{
/** Read only selector type. */
if (!(fFlags & SELMTOFLAT_FLAGS_NO_PL))
{
/** @todo fix this mess */
}
/* check limit. */
return VERR_OUT_OF_SELECTOR_BOUNDS;
/* ok */
if (ppvGC)
if (pcb)
return VINF_SUCCESS;
if (!(fFlags & SELMTOFLAT_FLAGS_NO_PL))
{
/** @todo fix this mess */
}
/* check limit. */
return VERR_OUT_OF_SELECTOR_BOUNDS;
/* ok */
if (ppvGC)
if (pcb)
return VINF_SUCCESS;
if (!(fFlags & SELMTOFLAT_FLAGS_NO_PL))
{
/** @todo fix this mess */
}
/* check limit. */
return VERR_OUT_OF_SELECTOR_BOUNDS;
return VERR_OUT_OF_SELECTOR_BOUNDS;
/* ok */
if (ppvGC)
if (pcb)
return VINF_SUCCESS;
case BOTH(0,X86_SEL_TYPE_SYS_286_TSS_AVAIL):
case BOTH(0,X86_SEL_TYPE_SYS_LDT):
case BOTH(0,X86_SEL_TYPE_SYS_286_TSS_BUSY):
case BOTH(0,X86_SEL_TYPE_SYS_286_CALL_GATE):
case BOTH(0,X86_SEL_TYPE_SYS_TASK_GATE):
case BOTH(0,X86_SEL_TYPE_SYS_286_INT_GATE):
case BOTH(0,X86_SEL_TYPE_SYS_286_TRAP_GATE):
case BOTH(0,X86_SEL_TYPE_SYS_386_TSS_AVAIL):
case BOTH(0,X86_SEL_TYPE_SYS_386_TSS_BUSY):
case BOTH(0,X86_SEL_TYPE_SYS_386_CALL_GATE):
case BOTH(0,X86_SEL_TYPE_SYS_386_INT_GATE):
case BOTH(0,X86_SEL_TYPE_SYS_386_TRAP_GATE):
if (!(fFlags & SELMTOFLAT_FLAGS_NO_PL))
{
/** @todo fix this mess */
}
/* check limit. */
return VERR_OUT_OF_SELECTOR_BOUNDS;
/* ok */
if (ppvGC)
if (pcb)
return VINF_SUCCESS;
default:
return VERR_INVALID_SELECTOR;
}
}
return VERR_SELECTOR_NOT_PRESENT;
}
/**
* Validates and converts a GC selector based code address to a flat address.
*
* @returns Flat address.
* @param pVM VM Handle.
* @param SelCPL Current privilege level. Get this from SS - CS might be conforming!
* A full selector can be passed, we'll only use the RPL part.
* @param SelCS Selector part.
* @param Addr Address part.
* @param ppvFlat Where to store the flat address.
*/
static int selmValidateAndConvertCSAddr(PVM pVM, RTSEL SelCPL, RTSEL SelCS, RTGCPTR Addr, PRTGCPTR ppvFlat)
{
/** @todo validate limit! */
if (!(SelCS & X86_SEL_LDT))
else
{
/** @todo handle LDT page(s) not present! */
#ifdef IN_GC
#else
#endif
}
/*
* Check if present.
*/
{
/*
* Type check.
*/
{
/*
* Check level.
*/
)
{
/*
* Limit check.
*/
{
if (ppvFlat)
);
return VINF_SUCCESS;
}
return VERR_OUT_OF_SELECTOR_BOUNDS;
}
return VERR_INVALID_RPL;
}
return VERR_NOT_CODE_SELECTOR;
}
return VERR_SELECTOR_NOT_PRESENT;
}
/**
* Validates and converts a GC selector based code address to a flat address.
*
* @returns Flat address.
* @param pVM VM Handle.
* @param eflags Current eflags
* @param SelCPL Current privilege level. Get this from SS - CS might be conforming!
* A full selector can be passed, we'll only use the RPL part.
* @param SelCS Selector part.
* @param pHiddenSel The hidden CS selector register.
* @param Addr Address part.
* @param ppvFlat Where to store the flat address.
*/
SELMDECL(int) SELMValidateAndConvertCSAddr(PVM pVM, X86EFLAGS eflags, RTSEL SelCPL, RTSEL SelCS, CPUMSELREGHID *pHiddenCSSel, RTGCPTR Addr, PRTGCPTR ppvFlat)
{
/*
* Deal with real & v86 mode first.
*/
if ( CPUMIsGuestInRealMode(pVM)
{
if (ppvFlat)
{
if (!CPUMAreHiddenSelRegsValid(pVM))
else
}
return VINF_SUCCESS;
}
/** @todo when we're in 16 bits mode, we should cut off the address as well.. */
if (!CPUMAreHiddenSelRegsValid(pVM))
/*
* Check if present.
*/
{
/*
* Type check.
*/
{
/*
* Check level.
*/
)
{
/*
* Limit check.
*/
/** @todo correct with hidden limit value?? */
{
if (ppvFlat)
return VINF_SUCCESS;
}
return VERR_OUT_OF_SELECTOR_BOUNDS;
}
return VERR_INVALID_RPL;
}
return VERR_NOT_CODE_SELECTOR;
}
return VERR_SELECTOR_NOT_PRESENT;
}
/**
* Checks if a selector is 32-bit or 16-bit.
*
* @returns True if it is 32-bit.
* @returns False if it is 16-bit.
* @param pVM VM Handle.
* @param Sel The selector.
*/
{
/** @todo validate limit! */
if (!(Sel & X86_SEL_LDT))
else
{
/** @todo handle LDT page(s) not present! */
}
}
/**
* Checks if a selector is 32-bit or 16-bit.
*
* @returns True if it is 32-bit.
* @returns False if it is 16-bit.
* @param pVM VM Handle.
* @param eflags Current eflags register
* @param Sel The selector.
* @param pHiddenSel The hidden selector register.
*/
{
if (!CPUMAreHiddenSelRegsValid(pVM))
{
/*
* Deal with real & v86 mode first.
*/
if ( CPUMIsGuestInRealMode(pVM)
return false;
}
}
/**
* Returns Hypervisor's Trap 08 (\#DF) selector.
*
* @returns Hypervisor's Trap 08 (\#DF) selector.
* @param pVM VM Handle.
*/
{
}
/**
* Sets EIP of Hypervisor's Trap 08 (\#DF) TSS.
*
* @param pVM VM Handle.
* @param u32EIP EIP of Trap 08 handler.
*/
{
}
/**
* Sets ss:esp for ring1 in main Hypervisor's TSS.
*
* @param pVM VM Handle.
* @param ss Ring1 SS register value.
* @param esp Ring1 ESP register value.
*/
{
}
/**
* Gets ss:esp for ring1 in main Hypervisor's TSS.
*
* @returns VBox status code.
* @param pVM VM Handle.
* @param pSS Ring1 SS register value.
* @param pEsp Ring1 ESP register value.
*/
{
{
int rc;
#ifdef IN_GC
bool fTriedAlready = false;
#ifdef DEBUG
rc |= MMGCRamRead(pVM, &tss.offIoBitmap, GCPtrTss + RT_OFFSETOF(VBOXTSS, offIoBitmap), sizeof(tss.offIoBitmap));
#endif
if (VBOX_FAILURE(rc))
{
if (!fTriedAlready)
{
/* Shadow page might be out of sync. Sync and try again */
/** @todo might cross page boundary */
fTriedAlready = true;
if (rc != VINF_SUCCESS)
return rc;
goto l_tryagain;
}
return rc;
}
#else /* !IN_GC */
/* Reading too much. Could be cheaper than two seperate calls though. */
if (VBOX_FAILURE(rc))
{
return rc;
}
#endif /* !IN_GC */
#ifdef LOG_ENABLED
ssr0 &= ~1;
#endif
/* Update our TSS structure for the guest's ring 1 stack */
}
return VINF_SUCCESS;
}
/**
* Returns Guest TSS pointer
*
* @param pVM VM Handle.
*/
{
}
/**
* Validates a CS selector.
*
* @returns VBox status code.
* @param pSelInfo Pointer to the selector information for the CS selector.
* @param SelCPL The selector defining the CPL (SS).
*/
{
/*
* Check if present.
*/
{
/*
* Type check.
*/
{
/*
* Check level.
*/
)
return VINF_SUCCESS;
return VERR_INVALID_RPL;
}
return VERR_NOT_CODE_SELECTOR;
}
return VERR_SELECTOR_NOT_PRESENT;
}
/**
* Gets the hypervisor code selector (CS).
* @returns CS selector.
* @param pVM The VM handle.
*/
{
}
/**
* Gets the 64-mode hypervisor code selector (CS64).
* @returns CS selector.
* @param pVM The VM handle.
*/
{
}
/**
* Gets the hypervisor data selector (DS).
* @returns DS selector.
* @param pVM The VM handle.
*/
{
}
/**
* Gets the hypervisor TSS selector.
* @returns TSS selector.
* @param pVM The VM handle.
*/
{
}
/**
* Gets the hypervisor TSS Trap 8 selector.
* @returns TSS Trap 8 selector.
* @param pVM The VM handle.
*/
{
}
/**
* Gets the address for the hypervisor GDT.
*
* @returns The GDT address.
* @param pVM The VM handle.
* @remark This is intended only for very special use, like in the world
* switchers. Don't exploit this API!
*/
{
/*
* Always convert this from the HC pointer since. We're can be
* called before the first relocation and have to work correctly
* without having dependencies on the relocation order.
*/
}
/**
* Gets info about the current TSS.
*
* @returns VBox status code.
* @retval VINF_SUCCESS if we've got a TSS loaded.
* @retval VERR_SELM_NO_TSS if we haven't got a TSS (rather unlikely).
*
* @param pVM The VM handle.
* @param pGCPtrTss Where to store the TSS address.
* @param pcbTss Where to store the TSS size limit.
* @param pfCanHaveIOBitmap Where to store the can-have-I/O-bitmap indicator. (optional)
*/
SELMDECL(int) SELMGetTSSInfo(PVM pVM, PRTGCUINTPTR pGCPtrTss, PRTGCUINTPTR pcbTss, bool *pfCanHaveIOBitmap)
{
if (!CPUMAreHiddenSelRegsValid(pVM))
{
/*
* Do we have a valid TSS?
*/
return VERR_SELM_NO_TSS;
/*
* Fill in return values.
*/
if (pfCanHaveIOBitmap)
}
else
{
if (pfCanHaveIOBitmap)
}
return VINF_SUCCESS;
}