| 1 | /* $Id: k32ProcessReadWrite.cpp,v 1.2 2001-02-10 11:11:44 bird Exp $
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| 2 | *
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| 3 | * k32ProcessReadWrite - Read or write to another process.
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| 4 | *
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| 5 | * Copyright (c) 2000 knut st. osmundsen (knut.stange.osmundsen@mynd.no)
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| 6 | *
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| 7 | * Project Odin Software License can be found in LICENSE.TXT
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| 8 | *
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| 9 | */
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| 10 |
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| 11 |
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| 12 | /*******************************************************************************
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| 13 | * Defined Constants And Macros *
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| 14 | *******************************************************************************/
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| 15 | #define INCL_DOSMEMMGR
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| 16 | #define INCL_DOSERRORS
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| 17 |
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| 18 | #define INCL_OS2KRNL_TK
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| 19 | #define INCL_OS2KRNL_PTDA
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| 20 | #define INCL_OS2KRNL_VM
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| 21 | #define INCL_OS2KRNL_SEM
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| 22 | #define INCL_OS2KRNL_LDR
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| 23 | #define NO_WIN32K_LIB_FUNCTIONS
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| 24 |
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| 25 | /*******************************************************************************
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| 26 | * Header Files *
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| 27 | *******************************************************************************/
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| 28 | #include <os2.h>
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| 29 |
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| 30 | #include "devSegDf.h" /* Win32k segment definitions. */
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| 31 | #include "OS2Krnl.h"
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| 32 | #include "win32k.h"
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| 33 | #include "k32.h"
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| 34 | #include "options.h"
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| 35 | #include "dev32.h"
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| 36 | #include "log.h"
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| 37 |
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| 38 |
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| 39 | /**
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| 40 | * Reads or write memory in another process.
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| 41 | * @returns OS2 returncode.
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| 42 | * @param pid Process ID which is to be written to.
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| 43 | * @param cb Number of bytes to write.
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| 44 | * @param pvSource Pointer to data to read.
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| 45 | * @param pvTarget Pointer to where to write.
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| 46 | * @param fRead TRUE: pvSource is within pid while pvTarget is ours.
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| 47 | * FALSE: pvTarget is within pid while pvSource is ours.
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| 48 | * @status completely implelemented.
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| 49 | * @author knut st. osmundsen (knut.stange.osmundsen@mynd.no)
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| 50 | * @remark
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| 51 | */
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| 52 | APIRET k32ProcessReadWrite(PID pid, ULONG cb, PVOID pvSource, PVOID pvTarget, BOOL fRead)
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| 53 | {
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| 54 | ULONG ulAddrAlias;
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| 55 | ULONG cbAlias;
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| 56 | APIRET rc;
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| 57 | PPTDA pPTDA;
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| 58 | HPTDA hPTDA;
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| 59 | VMAC vmac;
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| 60 |
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| 61 | /*
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| 62 | * Find alias address and size and validate them a little.
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| 63 | */
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| 64 | ulAddrAlias = (ULONG)(fRead ? pvSource : pvTarget) & ~0xfffUL;
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| 65 | cbAlias = (cb + 0xfffUL) & ~0xfffUL;
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| 66 | if (cbAlias - 1 + ulAddrAlias < ulAddrAlias)
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| 67 | return ERROR_INVALID_ACCESS;
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| 68 |
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| 69 | /*
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| 70 | * Find the PTDA for the given PID.
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| 71 | */
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| 72 | pPTDA = NULL;
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| 73 | rc = TKPidToPTDA(pid, (PPPTDA)SSToDS(&pPTDA));
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| 74 | if (rc != NO_ERROR || pPTDA == NULL ||
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| 75 | (hPTDA = ptdaGet_ptda_handle(pPTDA)) == 0 || hPTDA == (USHORT)-1
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| 76 | )
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| 77 | {
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| 78 | kprintf(("k32ProcessReadWrite: Failed with invalid PID.\n"));
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| 79 | return rc != NO_ERROR ? rc : ERROR_INVALID_PARAMETER;
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| 80 | }
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| 81 |
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| 82 | /*
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| 83 | * Take loader semaphore before calling VMMapDebugAlias.
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| 84 | */
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| 85 | rc = LDRRequestSem();
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| 86 | if (rc != NO_ERROR)
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| 87 | {
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| 88 | kprintf(("k32ProcessReadWrite: LDRRequestSem failed with rc=%d\n", rc));
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| 89 | return rc;
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| 90 | }
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| 91 |
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| 92 | /*
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| 93 | * Allocate alias.
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| 94 | */
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| 95 | rc = VMMapDebugAlias(VMMDA_ARENASYSTEM | (fRead ? VMMDA_READONLY : 0),
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| 96 | ulAddrAlias,
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| 97 | cbAlias,
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| 98 | hPTDA,
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| 99 | (PVMAC)SSToDS(&vmac));
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| 100 | LDRClearSem();
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| 101 | if (rc != NO_ERROR)
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| 102 | {
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| 103 | kprintf(("k32ProcessReadWrite: VMMapDebugAlias failed with rc=%d\n"));
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| 104 | return rc;
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| 105 | }
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| 106 |
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| 107 | /*
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| 108 | * Copy data.
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| 109 | */
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| 110 | if (fRead)
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| 111 | pvSource = (PVOID)(vmac.ac_va + ((ULONG)pvSource & 0xfff));
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| 112 | else
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| 113 | pvTarget = (PVOID)(vmac.ac_va + ((ULONG)pvTarget & 0xfff));
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| 114 | rc = TKSuFuBuff(pvTarget,
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| 115 | pvSource,
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| 116 | cb,
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| 117 | TK_FUSU_NONFATAL | TK_FUSU_USER_SRC | TK_FUSU_USER_DST);
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| 118 | if (rc != NO_ERROR)
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| 119 | kprintf(("k32ProcessReadWrite: TKSuFuBuff failed with rc=%d\n"));
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| 120 |
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| 121 | /*
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| 122 | * Cleanup and exit.
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| 123 | */
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| 124 | pPTDA = ptdaGetCur();
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| 125 | if (pPTDA == NULL || (hPTDA = ptdaGet_ptda_handle(pPTDA)) == 0 || hPTDA == (USHORT)-1)
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| 126 | kprintf(("k32ProcessReadWrite: Failed to get hPTDA of current process\n"));
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| 127 | if (VMFreeMem(vmac.ac_va, hPTDA, 0))
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| 128 | kprintf(("k32ProcessReadWrite: VMFreeMem failed!\n"));
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| 129 |
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| 130 | return rc;
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| 131 | }
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| 132 |
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| 133 |
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