/* (C) 2003-2007 Willem Jan Hengeveld <itsme@xs4all.nl>
 * Web: http://www.xs4all.nl/~itsme/
 *      http://wiki.xda-developers.com/
 *
 * $Id: cever_deps.cpp 1756 2008-03-19 13:40:04Z itsme $
 */
#include <windows.h>

#include "cever_deps.h"
#include "kernelmisc.h"
#include "stringutils.h"
#include "cenk.h"
#include "debug.h"
#include "itsutils.h"
#include "MemoryUsage.h"
/*
differences in struct sizes - these are certainly different between os versions
there may be more differences.
           | 300  | 420 | 501
-----------+------+-----+----
CPUCONTEXT |  68  | 240 | 240
CALLSTACK  |  20  |  28 |  28
THREAD     | 380  | 572 | 576
e32_lite   |  72  |  72 |  84    - has extra timestamp + extra info record
PROCESS    | 176  | 216 | 240
FSMAP      |  44  |  48 |  48
Module     | 208  | 216 | 228
FreeInfo   |  12  |  16 |  16
MemBlock   |  76  |  16 |  16
EVENT      | 148  | 156 | 156
MUTEX      | 164  | 168 | 168
SEMAPHORE  | 152  | 156 | 156
CRIT       | 160  | 164 | 164
e32_rom    | 108  | 108 | 112


*/
bool test_forver()
{
    debug("%d: FILETIME=%d CPUCONTEXT=%d CALLSTACK=%d THREAD=%d openexe_t=%d info=%d e32_lite=%d o32_lite=%d PGPOOL_Q=%d PROCESS=%d CINFO=%d HDATA=%d fsopendev_t=%d fsdev_t=%d FSMAP=%d PROXY=%d Module=%d Name=%d MemoryInfo=%d FreeInfo=%d MemBlock=%d APISET=%d EVENT=%d MUTEX=%d SEMAPHORE=%d CLEANEVENT=%d CRIT=%d CRITICAL_SECTION=%d ROMHDR=%d COPYentry=%d FILESentry=%d TOCentry=%d e32_rom=%d o32_rom=%d IMAGE_DEBUG_DIRECTORY=%d e32_exe=%d o32_obj=%d\n",
        _WIN32_WCE, sizeof(FILETIME) , sizeof(CPUCONTEXT) , sizeof(CALLSTACK) , sizeof(THREAD) , sizeof(openexe_t) , sizeof(info) , sizeof(e32_lite) , sizeof(o32_lite) , sizeof(PGPOOL_Q) , sizeof(PROCESS) , sizeof(CINFO) , sizeof(HDATA)   , sizeof(fsopendev_t) , sizeof(fsdev_t)       , sizeof(FSMAP) , sizeof(PROXY) , sizeof(Module) , sizeof(Name) , sizeof(MemoryInfo) , sizeof(FreeInfo) , sizeof(MemBlock) , sizeof(APISET) , sizeof(EVENT) , sizeof(MUTEX) , sizeof(SEMAPHORE)    , sizeof(CLEANEVENT) , sizeof(CRIT) , sizeof(CRITICAL_SECTION)  , sizeof(ROMHDR) , sizeof(COPYentry) , sizeof(FILESentry) , sizeof(TOCentry) , sizeof(e32_rom) , sizeof(o32_rom) , sizeof(IMAGE_DEBUG_DIRECTORY) , sizeof(e32_exe) , sizeof(o32_obj));
    return true;
}

// c:\local\wince300\PRIVATE/WINCEOS/COREOS/NK/INC/kernel.h
//
//bool GetProcessTimes_forver(DWORD pid, DWORD *ptKernel, DWORD *ptUser)
//{
//    HDATA *hdata= cvHandle2HDataPtr((HANDLE)pid);
//
//    PROCESS *pproc= (PROCESS *)hdata->pvObj;
//
//    DWORD tKernel=0;
//    DWORD tUser=0;
//
//    THREAD *pth= pproc->pTh;
//    while(pth)
//    {
//        tKernel += pth->dwKernTime;
//        tUser   += pth->dwUserTime;
//
//        pth= pth->pNextInProc;
//    }
//    *ptKernel= tKernel;
//    *ptUser= tUser;
//    return true;
//}

//const WCHAR *GetProcessCommandLine_forver(DWORD pid)
//{
//    HDATA *hdata= cvHandle2HDataPtr((HANDLE)pid);
//
//    PROCESS *pproc= (PROCESS *)hdata->pvObj;
//
//    return pproc->pcmdline;
//}

// ... called from debugger
int AddThreadInfo_forver(char *buf, int bufsize, DWORD pid, DWORD tid)
{
    int n=0;

    HDATA *hdp= cvHandle2HDataPtr((HANDLE)pid);
    PROCESS *proc= (PROCESS *)hdp->pvObj;

    HDATA *hdt= cvHandle2HDataPtr((HANDLE)tid);
    THREAD *thread= (THREAD*)hdt->pvObj;
    CPUCONTEXT *ctx= &(thread->ctx);

    n+= _snprintf(buf+n, bufsize-n, "PC=%08lx LR=%08lx SP=%08lx R0-12: %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
            ctx->Pc, ctx->Lr, ctx->Sp,
            ctx->R0, ctx->R1, ctx->R2, ctx->R3, ctx->R4, ctx->R5,
            ctx->R6, ctx->R7, ctx->R8, ctx->R9, ctx->R10, ctx->R11, ctx->R12);
    if (isValidPtr((DWORD)MapPtrWithBits(ctx->Sp, proc->dwVMBase))) {
#if _WIN32_WCE==300
        int maxsp= thread->dwStackBase+thread->dwStackBound- ctx->Sp;
#else
        int maxsp= thread->dwOrigBase+thread->dwOrigStkSize - ctx->Sp;
#endif
        n+= _snprintf(buf+n, bufsize-n, "stack: %s\n", hexdump((BYTE*)ctx->Sp, maxsp/4, 4).c_str());
    }
    return n;
}
//----------------------------------------------------------

bool GetProcessUsageList_forver(GetProcessUsageListResult *pOut)
{
    PROCESS *procarray= (PROCESS*)KData.aInfo[KINX_PROCARRAY];

    for (int i=0 ; i<32 ; i++) {
        if (procarray[i].dwVMBase) {

            // NOTE: process->pTh->pPrevInProc == NULL
            // the list iterates over pNextInProc until NULL is found, 
            // so it is not a circular list.
            //   but i check for a circular list anyway, just to be sure
            int j=0;
            ProcSummaryInfo &ps= pOut->list[procarray[i].procnum];
            ps.nThreads= GetProcessThreadSummary(procarray+i, &ps.tKernel, &ps.tUser);
            ps.hProc= procarray[i].hProc;
        }
    }

    return true;
}

bool dumpcallstack_forver(THREAD *t)
{
    for (CALLSTACK *p = t->pcstkTop ; p ; p= p->pcstkNext) {
#if _WIN32_WCE==300
        debug("callstack(%08lx/h%08lx) addr=%08lx proc=%08lx(h%08lx)\n",
                t, t->hTh,
                p->retAddr, p->pprcLast?p->pprcLast->hProc:0);
#else
        debug("callstack(%08lx/h%08lx) addr=%08lx sp=%08lx proc=%08lx(h%08lx)\n",
                t, t->hTh,
                p->retAddr, p->dwPrevSP, p->pprcLast?p->pprcLast->hProc:0);
#endif
    }
    return true;
}
bool dump_proxy_list_forver(PROXY *proxy)
{
    bool bFirst= true;
    for (PROXY *p= proxy ; p && (bFirst || p!=proxy) ; p= p->pThLinkNext, bFirst= false) {
        if (p==(PROXY*)0xffffc800 || IsBadReadPtr((void*)p, sizeof(PROXY))) {
            debug(">???? prox=%08lx\n", p);
            break;
        }
        debug("%08lx - o=%08lx t=%d p=%02x n=%d pTH=%08lx:%08lx\n",
                p, p->pObject, p->bType, p->prio, p->wCount, p->pTh, (p->pTh) ? p->pTh->hTh : INVALID_HANDLE_VALUE);
    }
    return true;
}
bool dumplocks_forver(THREAD *t)
{
    if (t->pProxList) {
        debug("%08lx is blocking these:\n", t->hTh, t);
        dump_proxy_list(t->pProxList);
    }
    if (t->lpProxy) {
        debug("%08lx is blocked by:\n", t->hTh);
        dump_proxy_list(t->lpProxy);
    }
    if (t->lpCritProxy) {
        debug("%08lx crit proxy:\n", t->hTh);
        dump_proxy_list(t->lpCritProxy);
    }
    if (t->lpPendProxy) {
        debug("%08lx pending proxies:\n", t->hTh);
        dump_proxy_list(t->lpPendProxy);
    }
    return true;
}

bool GetThreadUsageList_forver(GetThreadUsageListResult *pOut, bool resolve_modulenames)
{
    PROCESS *procarray= (PROCESS*)KData.aInfo[KINX_PROCARRAY];

    int threadnr= 0;
    for (int i=0 ; i<32 ; i++) {
        if (procarray[i].dwVMBase) {

            // NOTE: process->pTh->pPrevInProc == NULL
            // the list iterates over pNextInProc until NULL is found, 
            // so it is not a circular list.
            //   but i check for a circular list anyway, just to be sure
            int j=0;
            THREAD *pt;
            for (pt=procarray[i].pTh ; (threadnr<MAX_THREADS) && pt && (j==0 || pt!=procarray[i].pTh) ; pt= pt->pNextInProc, j++) {
/*
#if _WIN32_WCE==300
                debug("thread %08lx - %08lx: stack=%08lx-%08lx\n", 
                        pt->hTh, pt, 
                        pt->dwStackBase, pt->dwStackBase+pt->dwStackBound);
#else
                debug("thread %08lx - %08lx: stack=%08lx-%08lx\n", 
                        pt->hTh, pt, 
                        pt->dwOrigBase, pt->dwOrigBase+pt->dwOrigStkSize);
#endif
                dumplocks(pt);
                dumpcallstack(pt);
*/
                ThreadSummaryInfo &ts= pOut->list[threadnr++];

                if (pt->pOwnerProc==NULL) {
                    debug("ownerproc==NULL\n");
                }
                else {
                    ts.hProc   = pt->pOwnerProc->hProc;
                }
                ts.hThread = pt->hTh;
                ts.tKernel = pt->dwKernTime;
                ts.tUser   = pt->dwUserTime;
                ts.dwStartAddr= pt->dwStartAddr;
                ts.dwCurPC= pt->ctx.Pc;
                ts.dwCurLR= pt->ctx.Lr;
                ts.dwCurSP= pt->ctx.Sp;
                ts.szModname[0]= 0;

                ts.baseprio= pt->bBPrio;
                ts.curprio= pt->bCPrio;
            }
            if (threadnr>=MAX_THREADS) {
                debug("too many threads, itsutils can handle max %d threads\n", MAX_THREADS);
                break;
            }
            else if (pt)
                debug("GetThreadUsageList:NOTE: this device uses a circular list for threads\n");
        }
//      else
//          debug("ignoring process %d : num %d h %08lx\n", i, procarray[i].procnum, procarray[i].hProc);
    }
    pOut->nThreads= threadnr;

    if (resolve_modulenames) {
        ModuleInfoMap mimap;
        if (CreateModuleInfoMap(mimap))
            for (int i=0 ; i<threadnr ; i++) {
                ThreadSummaryInfo &ts= pOut->list[i];
                FindModuleNameForProcessAddress(mimap, (DWORD)ts.hProc, ts.dwStartAddr, ts.szModname, 255);
            }
    }

    return true;
}


/*

at 0xffffc8a0 there is a list of 64 section pointers
unused sections all contain the same ptr to a special 'NullSection', containing only NULs

each section is a list of 512 ptrs to MEMBLOCKs
  there are 2 special memblock ptr values:
     0x00000000  - null
     0x00000001  - reserved

each memblock contains 12 bytes of info + a ptr to a pagelist

each pagelist contains 16 pagetable entries
  there are 2 special pagetable entries:
     0x00000000 - unused
     0xfffffff0 - BAD_PAGE
  of each entry bits 31-12 point to a physical memory page
  the low 12 bits can contain the following values:
      0x00e   - readonly
      0xffe   - readwrite

*/

// this function is different is os version dependent,
// since the nksection/securesection was introduced in wince4
// and aPages was an array in wince3, and a ptr to a memblock array in wince4
DWORD VirtToPhys_forver(DWORD dwAddr)
{
    if (dwAddr==0)
        return INVALID_PHYSICAL_ADDRESS;

    if ((dwAddr<0x80000000)
#if _WIN32_WCE>=400
            || (IsSecureVa(dwAddr)) // IsSecureVa from pkfuncs.h
#endif
            )
    {
        //  fedcba9876543210fedcba9876543210
        //  0ssssssbbbbbbbbbpppp............
        // 
        //  sectiontable[sssssss]->memblock[bbbbbbbbb]->page[pppp]
        //     
        SECTION *pscn = 
#if _WIN32_WCE>=400
            (dwAddr & 0x80000000) ? (SECTION*)KInfoTable[KINX_NKSECTION] :
#endif
                SectionTable[dwAddr>>VA_SECTION];
        DWORD ixBlock = (dwAddr >> VA_BLOCK) & BLOCK_MASK;
        DWORD ixPage = (dwAddr >> VA_PAGE) & PAGE_MASK;
        MEMBLOCK *pmb = (*pscn)[ixBlock];

        if (pmb==NULL_BLOCK || pmb==RESERVED_BLOCK)
            return INVALID_PHYSICAL_ADDRESS;
        if (pmb->aPages[ixPage]==0 || pmb->aPages[ixPage]==BAD_PAGE)
            return INVALID_PHYSICAL_ADDRESS;

        return (pmb->aPages[ixPage]&0xfffff000) | (dwAddr&0xfff);
    }
    else {
        DWORD ixPage= (dwAddr>>20)&0xfff;
        DWORD dwEntry= FirstPT[ixPage]; // FirstPT is defined in nkarm.h
        if ((dwEntry&3)==2) {
            //  fedcba9876543210fedcba9876543210
            //  ssssssssssss.................... index in 1st ptbl
            //
            // section descriptor
            return (dwEntry&0xfff00000)|(dwAddr&0xfffff);
        }
        else if ((dwEntry&0xfffff)==0) {
            return INVALID_PHYSICAL_ADDRESS;
        }
        else if ((dwEntry&3)==1) {
            //  fedcba9876543210fedcba9876543210
            //  ............22222222............  index in 2nd ptbl
            // coarse page table entry
            DWORD phys_2nd_tlb= dwEntry&~0x3f;
            DWORD virt_2nd_tlb= PhysToVirtUC(phys_2nd_tlb);

            DWORD ix2ndPage= (dwAddr>>12)&0xff;
            DWORD dw2ndEntry= ((DWORD*)virt_2nd_tlb)[ix2ndPage];
            if ((dw2ndEntry&3)==1) {
                // large page
                //
                //  fedcba9876543210fedcba9876543210
                //  ............22222222............  index in 2nd ptbl
                //  ................llllllllllllllll  large page adress mask
                //
                // note that there is an overlap between used addressbits here
                // and used bits to index ix2ndpage.
                // -> virt_2nd_tlb[ix2ndPage&~0xf+i] for i= 0 ..15 must be equal
                return (dw2ndEntry&0xffff0000)|(dwAddr&0xffff);
            }
            else if ((dw2ndEntry&3)==2) {
                // small page
                //
                //  fedcba9876543210fedcba9876543210
                //  ............22222222............  index in 2nd ptbl
                //  ....................ssssssssssss  small page adress mask
                //
                return (dw2ndEntry&0xfffff000)|(dwAddr&0xfff);;
            }
            // tiny pages should only occur in fine 2nd level pages
            return INVALID_PHYSICAL_ADDRESS;
        }
        else if ((dwEntry&3)==3) {
            //  fedcba9876543210fedcba9876543210
            //  ............2222222222..........  index in 2nd ptbl
            // fine page table entry
            DWORD phys_2nd_tlb= dwEntry&~0xfff;
            DWORD virt_2nd_tlb= PhysToVirtUC(phys_2nd_tlb);

            DWORD ix2ndPage= (dwAddr>>10)&0x3ff;
            DWORD dw2ndEntry= ((DWORD*)virt_2nd_tlb)[ix2ndPage];
            if ((dw2ndEntry&3)==1) {
                // large page
                //
                //  fedcba9876543210fedcba9876543210
                //  ............2222222222..........  index in 2nd ptbl
                //  ................llllllllllllllll  large page adress mask
                //
                return (dw2ndEntry&0xffff0000)|(dwAddr&0xffff);
            }
            else if ((dw2ndEntry&3)==2) {
                // small page
                //
                //  fedcba9876543210fedcba9876543210
                //  ............2222222222..........  index in 2nd ptbl
                //  ....................ssssssssssss  small page adress mask
                //
                return (dw2ndEntry&0xfffff000)|(dwAddr&0xfff);;
            }
            else if ((dw2ndEntry&3)==3) {
                // tiny page
                //
                //  fedcba9876543210fedcba9876543210
                //  ............2222222222..........  index in 2nd ptbl
                //  ......................tttttttttt  tiny page address mask
                //
                return (dw2ndEntry&0xfffffc00)|(dwAddr&0x3ff);;

            }
            return INVALID_PHYSICAL_ADDRESS;
        }
        return INVALID_PHYSICAL_ADDRESS;
    }
}

static bool match_process_name(const TCHAR *a, const TCHAR *b)
{
    while (*a && *b && *a!='.' && *b!='.' && tolower(*a)==tolower(*b)) {
        a++;
        b++;
    }
    return (*a==0 || *a=='.') && (*b==0 || *b=='.');
}
int FindProcessSlotForName_forver(const TCHAR *procname)
{
    PROCESS *procarray= (PROCESS*)KData.aInfo[KINX_PROCARRAY];

    for (int i=0 ; i<32 ; i++) {
        if (procarray[i].dwVMBase) {
            if (match_process_name(procarray[i].lpszProcName, procname)) {
                return i;
            }
        }
    }
    return -1;
}

DWORD getProcessSlotVMBase_forver(int slot)
{
    PROCESS *procarray= (PROCESS*)KData.aInfo[KINX_PROCARRAY];

    return procarray[slot].dwVMBase;
}
HANDLE getProcessSlotHandle_forver(int slot)
{
    PROCESS *procarray= (PROCESS*)KData.aInfo[KINX_PROCARRAY];

    return procarray[slot].hProc;
}


DWORD GetModuleMembase_forver(const struct Module *m)
{
    DWORD base= (DWORD)m->BasePtr;
    if (base>=0xc2000000 && base<0xc4000000)
        base-=0xc2000000;
    return base;
}
bool FillModuleInfo_forver(ModuleInfo &mi, const struct Module *m)
{
    mi.csegbase= m->e32.e32_vbase;
    mi.csegsize= m->e32.e32_vsize;
    mi.name= ToString(m->lpszModName);

    mi.membase= (DWORD)m->BasePtr;
    mi.usagemask= m->inuse;

    // find largest read/write data page
    mi.dsegbase= 0;
    mi.dsegsize= 0;
    //debug("module %08lx %ls\n", ent->dwVBase, ent->szModuleName);
    for (size_t i=0 ; i<m->e32.e32_objcnt ; i++) {
        struct o32_lite *o32= &(m->o32_ptr[i]);
        //debug("o32 VA%08lx RA%08lx DP%08lx  A%08lx F%08lx l=%08lx\n", o32->o32_rva, o32->o32_realaddr, o32->o32_dataptr, o32->o32_access, o32->o32_flags, o32->o32_vsize);
        if (o32->o32_access==PAGE_READWRITE && (mi.dsegsize==0 || mi.dsegsize < o32->o32_vsize)) {
            mi.dsegbase= o32->o32_realaddr;
            mi.dsegsize= o32->o32_vsize;
        }
    }

    //debug("mod %08lx %08lx-%08lx  %08lx-%08lx  %hs\n", mi.membase, mi.csegbase, mi.csegbase+mi.csegsize, mi.dsegbase, mi.dsegbase+mi.dsegsize, mi.name.c_str());

    return true;
}

bool GetProcessList_forver(CeProcessList& list)
{
    PROCESS *procarray= (PROCESS*)KData.aInfo[KINX_PROCARRAY];

    for (int i=0 ; i<32 ; i++) {
        if (procarray[i].dwVMBase) {
            PROCESS *pp= procarray+i;
            list.resize(list.size()+1);
            CEPROCESSENTRY *cepe= &list.back();

            //cepe->cntUsage= pp->cntUsage; 
            cepe->dwProcessID= (DWORD)pp->hProc; 
            //cepe->dwDefaultHeapID= pp->th32DefaultHeapID; 
            //cepe->dwModuleID= pp->th32ModuleID; 
            //cepe->cntThreads= GetProcessThreadSummary(pp, &cepe->dwKernelTime, &cepe->dwUserTime); 
            //cepe->dwParentProcessID= pp->th32ParentProcessID; 
            //cepe->dwFlags= pp->dwFlags; 
            cepe->dwMemoryBase= pp->dwVMBase;
            cepe->dwAccessKey= pp->aky;

            wcsncpy(cepe->szExeFile, pp->lpszProcName, MAX_PATH); 
            wcsncpy(cepe->szCmdLine, pp->pcmdline, MAX_PATH);

            // this is optional, since the the heap of gwes.exe may take upto 5 seconds to scan.
//            if (pbInput->bIncludeHeapUsage)
                cepe->dwMemoryUsage= CalcMemoryUsageForSection(pp->dwVMBase>>25);
        }
    }
    return true;
}
int GetProcessThreadSummary_forver(PROCESS *pp, DWORD *ptKernel, DWORD *ptUser)
{
    int count=0;
    DWORD tKernel=0;
    DWORD tUser=0;
    for (THREAD *pt= pp->pTh ; pt && (count==0 || pt!=pp->pTh) ; pt=pt->pNextInProc) {
        tKernel += pt->dwKernTime;
        tUser   += pt->dwUserTime;
        count++;
    }
    *ptKernel= tKernel;
    *ptUser= tUser;
    return count;
}