/** @file * SELM - The Selector Monitor(/Manager). */ /* * Copyright (C) 2006 InnoTek Systemberatung GmbH * * This file is part of VirtualBox Open Source Edition (OSE), as * available from http://www.virtualbox.org. This file 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, * 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. */ #ifndef __VBox_selm_h__ #define __VBox_selm_h__ #include #include #include __BEGIN_DECLS /** @defgroup grp_selm The Selector Monitor(/Manager) API * @{ */ /** * Returns Hypervisor's Trap 08 (\#DF) selector. * * @returns Hypervisor's Trap 08 (\#DF) selector. * @param pVM VM Handle. */ SELMDECL(RTSEL) SELMGetTrap8Selector(PVM pVM); /** * Sets EIP of Hypervisor's Trap 08 (\#DF) TSS. * * @param pVM VM Handle. * @param u32EIP EIP of Trap 08 handler. */ SELMDECL(void) SELMSetTrap8EIP(PVM pVM, uint32_t u32EIP); /** * 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. */ SELMDECL(void) SELMSetRing1Stack(PVM pVM, uint32_t ss, uint32_t esp); /** * 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. */ SELMDECL(int) SELMGetRing1Stack(PVM pVM, uint32_t *pSS, uint32_t *pEsp); /** * Returns Guest TSS pointer * * @param pVM VM Handle. */ SELMDECL(RTGCPTR) SELMGetGuestTSS(PVM pVM); /** * Gets the hypervisor code selector (CS). * @returns CS selector. * @param pVM The VM handle. */ SELMDECL(RTSEL) SELMGetHyperCS(PVM pVM); /** * Gets the 64-mode hypervisor code selector (CS64). * @returns CS selector. * @param pVM The VM handle. */ SELMDECL(RTSEL) SELMGetHyperCS64(PVM pVM); /** * Gets the hypervisor data selector (DS). * @returns DS selector. * @param pVM The VM handle. */ SELMDECL(RTSEL) SELMGetHyperDS(PVM pVM); /** * Gets the hypervisor TSS selector. * @returns TSS selector. * @param pVM The VM handle. */ SELMDECL(RTSEL) SELMGetHyperTSS(PVM pVM); /** * Gets the hypervisor TSS Trap 8 selector. * @returns TSS Trap 8 selector. * @param pVM The VM handle. */ SELMDECL(RTSEL) SELMGetHyperTSSTrap08(PVM pVM); /** * 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! */ SELMDECL(RTGCPTR) SELMGetHyperGDT(PVM pVM); /** * 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); /** * 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 Addr Address part. */ SELMDECL(RTGCPTR) SELMToFlat(PVM pVM, X86EFLAGS eflags, RTSEL Sel, CPUMSELREGHID *pHiddenSel, RTGCPTR Addr); /** Flags for SELMToFlatEx(). * @{ */ /** Don't check the RPL,DPL or CPL. */ #define SELMTOFLAT_FLAGS_NO_PL BIT(8) /** Flags contains CPL information. */ #define SELMTOFLAT_FLAGS_HAVE_CPL BIT(9) /** CPL is 3. */ #define SELMTOFLAT_FLAGS_CPL3 3 /** CPL is 2. */ #define SELMTOFLAT_FLAGS_CPL2 2 /** CPL is 1. */ #define SELMTOFLAT_FLAGS_CPL1 1 /** CPL is 0. */ #define SELMTOFLAT_FLAGS_CPL0 0 /** Get the CPL from the flags. */ #define SELMTOFLAT_FLAGS_CPL(fFlags) ((fFlags) & X86_SEL_RPL) /** Allow converting using Hypervisor GDT entries. */ #define SELMTOFLAT_FLAGS_HYPER BIT(10) /** @} */ /** * 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 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, unsigned fFlags, PRTGCPTR ppvGC, uint32_t *pcb); /** * 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); /** * 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. */ SELMDECL(bool) SELMIsSelector32Bit(PVM pVM, X86EFLAGS eflags, RTSEL Sel, CPUMSELREGHID *pHiddenSel); /** * Returns flat address and limit of LDT by LDT selector. * * Fully validate selector. * * @returns VBox status. * @param pVM VM Handle. * @param SelLdt LDT selector. * @param ppvLdt Where to store the flat address of LDT. * @param pcbLimit Where to store LDT limit. */ SELMDECL(int) SELMGetLDTFromSel(PVM pVM, RTSEL SelLdt, PRTGCPTR ppvLdt, unsigned *pcbLimit); /** * Selector information structure. */ typedef struct SELMSELINFO { /** The base address. */ RTGCPTR GCPtrBase; /** The limit (-1). */ RTGCUINTPTR cbLimit; /** The raw descriptor. */ VBOXDESC Raw; /** The selector. */ RTSEL Sel; /** Set if the selector is used by the hypervisor. */ bool fHyper; /** Set if the selector is a real mode segment. */ bool fRealMode; } SELMSELINFO; /** Pointer to a SELM selector information struct. */ typedef SELMSELINFO *PSELMSELINFO; /** Pointer to a const SELM selector information struct. */ typedef const SELMSELINFO *PCSELMSELINFO; /** * 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). */ SELMDECL(int) SELMSelInfoValidateCS(PCSELMSELINFO pSelInfo, RTSEL SelCPL); #ifdef IN_RING3 /** @defgroup grp_selm_r3 The Selector Monitor(/Manager) API * @ingroup grp_selm * @{ */ /** * Initializes the SELM. * * @returns VBox status code. * @param pVM The VM to operate on. */ SELMR3DECL(int) SELMR3Init(PVM pVM); /** * Finalizes HMA page attributes. * * @returns VBox status code. * @param pVM The VM handle. */ SELMR3DECL(int) SELMR3InitFinalize(PVM pVM); /** * Applies relocations to data and code managed by this * component. This function will be called at init and * whenever the VMM need to relocate it self inside the GC. * * @param pVM The VM. */ SELMR3DECL(void) SELMR3Relocate(PVM pVM); /** * Notification callback which is called whenever there is a chance that a CR3 * value might have changed. * This is called by PGM. * * @param pVM The VM handle */ SELMR3DECL(void) SELMR3PagingModeChanged(PVM pVM); /** * Terminates the SELM. * * Termination means cleaning up and freeing all resources, * the VM it self is at this point powered off or suspended. * * @returns VBox status code. * @param pVM The VM to operate on. */ SELMR3DECL(int) SELMR3Term(PVM pVM); /** * The VM is being reset. * * For the SELM component this means that any GDT/LDT/TSS monitors * needs to be removed. * * @param pVM VM handle. */ SELMR3DECL(void) SELMR3Reset(PVM pVM); /** * Updates the Guest GDT & LDT virtualization based on current CPU state. * * @returns VBox status code. * @param pVM The VM to operate on. */ SELMR3DECL(int) SELMR3UpdateFromCPUM(PVM pVM); /** * Compares the Guest GDT and LDT with the shadow tables. * This is a VBOX_STRICT only function. * * @returns VBox status code. * @param pVM The VM Handle. */ SELMR3DECL(int) SELMR3DebugCheck(PVM pVM); #ifdef VBOX_STRICT # define SELMR3DEBUGCHECK(pVM) SELMR3DebugCheck(pVM) #else # define SELMR3DEBUGCHECK(pVM) do { } while (0) #endif /** * Check if the TSS ring 0 stack selector and pointer were updated (for now) * * @returns VBox status code. * @param pVM The VM to operate on. */ SELMR3DECL(int) SELMR3SyncTSS(PVM pVM); /** * Gets information about a selector. * Intended for the debugger mostly and will prefer the guest * descriptor tables over the shadow ones. * * @returns VINF_SUCCESS on success. * @returns VERR_INVALID_SELECTOR if the selector isn't fully inside the descriptor table. * @returns VERR_SELECTOR_NOT_PRESENT if the selector wasn't present. * @returns VERR_PAGE_TABLE_NOT_PRESENT or VERR_PAGE_NOT_PRESENT if the pagetable or page * backing the selector table wasn't present. * @returns Other VBox status code on other errros. * * @param pVM VM handle. * @param Sel The selector to get info about. * @param pSelInfo Where to store the information. */ SELMR3DECL(int) SELMR3GetSelectorInfo(PVM pVM, RTSEL Sel, PSELMSELINFO pSelInfo); /** * Gets information about a selector from the shadow tables. * * This is intended to be faster than the SELMR3GetSelectorInfo() method, but requires * that the caller ensures that the shadow tables are up to date. * * @returns VINF_SUCCESS on success. * @returns VERR_INVALID_SELECTOR if the selector isn't fully inside the descriptor table. * @returns VERR_SELECTOR_NOT_PRESENT if the selector wasn't present. * @returns VERR_PAGE_TABLE_NOT_PRESENT or VERR_PAGE_NOT_PRESENT if the pagetable or page * backing the selector table wasn't present. * @returns Other VBox status code on other errors. * * @param pVM VM handle. * @param Sel The selector to get info about. * @param pSelInfo Where to store the information. */ SELMR3DECL(int) SELMR3GetShadowSelectorInfo(PVM pVM, RTSEL Sel, PSELMSELINFO pSelInfo); /** * Validates the RawR0 TSS values against the one in the Guest TSS. * * @returns true if it matches. * @returns false and assertions on mismatch.. * @param pVM VM Handle. */ SELMR3DECL(bool) SELMR3CheckTSS(PVM pVM); /** * Disable GDT/LDT/TSS monitoring and syncing * * @param pVM The VM to operate on. */ SELMR3DECL(void) SELMR3DisableMonitoring(PVM pVM); /** * Dumps a descriptor. * * @param Desc Descriptor to dump. * @param Sel Selector number. * @param pszMsg Message to prepend the log entry with. */ SELMR3DECL(void) SELMR3DumpDescriptor(VBOXDESC Desc, RTSEL Sel, const char *pszMsg); /** * Dumps the hypervisor GDT. * * @param pVM VM handle. */ SELMR3DECL(void) SELMR3DumpHyperGDT(PVM pVM); /** * Dumps the hypervisor LDT. * * @param pVM VM handle. */ SELMR3DECL(void) SELMR3DumpHyperLDT(PVM pVM); /** * Dumps the guest GDT. * * @param pVM VM handle. */ SELMR3DECL(void) SELMR3DumpGuestGDT(PVM pVM); /** * Dumps the guest LDT. * * @param pVM VM handle. */ SELMR3DECL(void) SELMR3DumpGuestLDT(PVM pVM); /** @} */ #endif /** @} */ __END_DECLS #endif