ntdll: Always allocate extra stack space for the kernel stack.

[wine.git] / dlls / ntdll / unix / thread.c

/*
 * NT threads support
 *
 * Copyright 1996, 2003 Alexandre Julliard
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 */

#if 0
#pragma makedep unix
#endif

#include "config.h"
#include "wine/port.h"

#include <assert.h>
#include <errno.h>
#include <limits.h>
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include <pthread.h>
#include <signal.h>
#include <sys/types.h>
#ifdef HAVE_SYS_MMAN_H
#include <sys/mman.h>
#endif
#ifdef HAVE_SYS_TIMES_H
#include <sys/times.h>
#endif
#ifdef HAVE_SYS_SYSCALL_H
#include <sys/syscall.h>
#endif
#ifdef HAVE_SYS_SYSCTL_H
#include <sys/sysctl.h>
#endif
#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
#ifdef HAVE_SYS_QUEUE_H
#include <sys/queue.h>
#endif
#ifdef HAVE_SYS_USER_H
#include <sys/user.h>
#endif
#ifdef HAVE_LIBPROCSTAT_H
#include <libprocstat.h>
#endif

#define NONAMELESSUNION
#define NONAMELESSSTRUCT
#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "winternl.h"
#include "ddk/wdm.h"
#include "wine/server.h"
#include "wine/debug.h"
#include "wine/exception.h"
#include "unix_private.h"

WINE_DEFAULT_DEBUG_CHANNEL(thread);
WINE_DECLARE_DEBUG_CHANNEL(seh);

#ifndef PTHREAD_STACK_MIN
#define PTHREAD_STACK_MIN 16384
#endif

static int nb_threads = 1;

static inline int get_unix_exit_code( NTSTATUS status )
{
    /* prevent a nonzero exit code to end up truncated to zero in unix */
    if (status && !(status & 0xff)) return 1;
    return status;
}


/***********************************************************************
 *           get_server_context_flags
 */
static unsigned int get_server_context_flags( const void *context, USHORT machine )
{
    unsigned int flags, ret = 0;

    switch (machine)
    {
    case IMAGE_FILE_MACHINE_I386:
        flags = ((const I386_CONTEXT *)context)->ContextFlags & ~CONTEXT_i386;
        if (flags & CONTEXT_I386_CONTROL) ret |= SERVER_CTX_CONTROL;
        if (flags & CONTEXT_I386_INTEGER) ret |= SERVER_CTX_INTEGER;
        if (flags & CONTEXT_I386_SEGMENTS) ret |= SERVER_CTX_SEGMENTS;
        if (flags & CONTEXT_I386_FLOATING_POINT) ret |= SERVER_CTX_FLOATING_POINT;
        if (flags & CONTEXT_I386_DEBUG_REGISTERS) ret |= SERVER_CTX_DEBUG_REGISTERS;
        if (flags & CONTEXT_I386_EXTENDED_REGISTERS) ret |= SERVER_CTX_EXTENDED_REGISTERS;
        if (flags & CONTEXT_I386_XSTATE) ret |= SERVER_CTX_YMM_REGISTERS;
        break;
    case IMAGE_FILE_MACHINE_AMD64:
        flags = ((const AMD64_CONTEXT *)context)->ContextFlags & ~CONTEXT_AMD64;
        if (flags & CONTEXT_AMD64_CONTROL) ret |= SERVER_CTX_CONTROL;
        if (flags & CONTEXT_AMD64_INTEGER) ret |= SERVER_CTX_INTEGER;
        if (flags & CONTEXT_AMD64_SEGMENTS) ret |= SERVER_CTX_SEGMENTS;
        if (flags & CONTEXT_AMD64_FLOATING_POINT) ret |= SERVER_CTX_FLOATING_POINT;
        if (flags & CONTEXT_AMD64_DEBUG_REGISTERS) ret |= SERVER_CTX_DEBUG_REGISTERS;
        if (flags & CONTEXT_AMD64_XSTATE) ret |= SERVER_CTX_YMM_REGISTERS;
        break;
    case IMAGE_FILE_MACHINE_ARMNT:
        flags = ((const ARM_CONTEXT *)context)->ContextFlags & ~CONTEXT_ARM;
        if (flags & CONTEXT_ARM_CONTROL) ret |= SERVER_CTX_CONTROL;
        if (flags & CONTEXT_ARM_INTEGER) ret |= SERVER_CTX_INTEGER;
        if (flags & CONTEXT_ARM_FLOATING_POINT) ret |= SERVER_CTX_FLOATING_POINT;
        if (flags & CONTEXT_ARM_DEBUG_REGISTERS) ret |= SERVER_CTX_DEBUG_REGISTERS;
        break;
    case IMAGE_FILE_MACHINE_ARM64:
        flags = ((const ARM64_NT_CONTEXT *)context)->ContextFlags & ~CONTEXT_ARM64;
        if (flags & CONTEXT_ARM64_CONTROL) ret |= SERVER_CTX_CONTROL;
        if (flags & CONTEXT_ARM64_INTEGER) ret |= SERVER_CTX_INTEGER;
        if (flags & CONTEXT_ARM64_FLOATING_POINT) ret |= SERVER_CTX_FLOATING_POINT;
        if (flags & CONTEXT_ARM64_DEBUG_REGISTERS) ret |= SERVER_CTX_DEBUG_REGISTERS;
        break;
    }
    return ret;
}


/***********************************************************************
 *           context_to_server
 *
 * Convert a register context to the server format.
 */
static NTSTATUS context_to_server( context_t *to, const void *src, USHORT machine )
{
    DWORD i, flags;

    memset( to, 0, sizeof(*to) );
    to->machine = machine;

    switch (machine)
    {
    case IMAGE_FILE_MACHINE_I386:
    {
        const I386_CONTEXT *from = src;

        flags = from->ContextFlags & ~CONTEXT_i386;
        if (flags & CONTEXT_I386_CONTROL)
        {
            to->flags |= SERVER_CTX_CONTROL;
            to->ctl.i386_regs.ebp    = from->Ebp;
            to->ctl.i386_regs.esp    = from->Esp;
            to->ctl.i386_regs.eip    = from->Eip;
            to->ctl.i386_regs.cs     = from->SegCs;
            to->ctl.i386_regs.ss     = from->SegSs;
            to->ctl.i386_regs.eflags = from->EFlags;
        }
        if (flags & CONTEXT_I386_INTEGER)
        {
            to->flags |= SERVER_CTX_INTEGER;
            to->integer.i386_regs.eax = from->Eax;
            to->integer.i386_regs.ebx = from->Ebx;
            to->integer.i386_regs.ecx = from->Ecx;
            to->integer.i386_regs.edx = from->Edx;
            to->integer.i386_regs.esi = from->Esi;
            to->integer.i386_regs.edi = from->Edi;
        }
        if (flags & CONTEXT_I386_SEGMENTS)
        {
            to->flags |= SERVER_CTX_SEGMENTS;
            to->seg.i386_regs.ds = from->SegDs;
            to->seg.i386_regs.es = from->SegEs;
            to->seg.i386_regs.fs = from->SegFs;
            to->seg.i386_regs.gs = from->SegGs;
        }
        if (flags & CONTEXT_I386_FLOATING_POINT)
        {
            to->flags |= SERVER_CTX_FLOATING_POINT;
            to->fp.i386_regs.ctrl     = from->FloatSave.ControlWord;
            to->fp.i386_regs.status   = from->FloatSave.StatusWord;
            to->fp.i386_regs.tag      = from->FloatSave.TagWord;
            to->fp.i386_regs.err_off  = from->FloatSave.ErrorOffset;
            to->fp.i386_regs.err_sel  = from->FloatSave.ErrorSelector;
            to->fp.i386_regs.data_off = from->FloatSave.DataOffset;
            to->fp.i386_regs.data_sel = from->FloatSave.DataSelector;
            to->fp.i386_regs.cr0npx   = from->FloatSave.Cr0NpxState;
            memcpy( to->fp.i386_regs.regs, from->FloatSave.RegisterArea, sizeof(to->fp.i386_regs.regs) );
        }
        if (flags & CONTEXT_I386_DEBUG_REGISTERS)
        {
            to->flags |= SERVER_CTX_DEBUG_REGISTERS;
            to->debug.i386_regs.dr0 = from->Dr0;
            to->debug.i386_regs.dr1 = from->Dr1;
            to->debug.i386_regs.dr2 = from->Dr2;
            to->debug.i386_regs.dr3 = from->Dr3;
            to->debug.i386_regs.dr6 = from->Dr6;
            to->debug.i386_regs.dr7 = from->Dr7;
        }
        if (flags & CONTEXT_I386_EXTENDED_REGISTERS)
        {
            to->flags |= SERVER_CTX_EXTENDED_REGISTERS;
            memcpy( to->ext.i386_regs, from->ExtendedRegisters, sizeof(to->ext.i386_regs) );
        }
        if (flags & CONTEXT_I386_XSTATE)
        {
            const CONTEXT_EX *xctx = (const CONTEXT_EX *)(from + 1);
            const XSTATE *xs = (const XSTATE *)((const char *)xctx + xctx->XState.Offset);

            to->flags |= SERVER_CTX_YMM_REGISTERS;
            if (xs->Mask & 4)
                memcpy( &to->ymm.ymm_high_regs.ymm_high, &xs->YmmContext, sizeof(xs->YmmContext) );
        }
        return STATUS_SUCCESS;
    }

    case IMAGE_FILE_MACHINE_AMD64:
    {
        const AMD64_CONTEXT *from = src;

        flags = from->ContextFlags & ~CONTEXT_AMD64;
        if (flags & CONTEXT_AMD64_CONTROL)
        {
            to->flags |= SERVER_CTX_CONTROL;
            to->ctl.x86_64_regs.rbp   = from->Rbp;
            to->ctl.x86_64_regs.rip   = from->Rip;
            to->ctl.x86_64_regs.rsp   = from->Rsp;
            to->ctl.x86_64_regs.cs    = from->SegCs;
            to->ctl.x86_64_regs.ss    = from->SegSs;
            to->ctl.x86_64_regs.flags = from->EFlags;
        }
        if (flags & CONTEXT_AMD64_INTEGER)
        {
            to->flags |= SERVER_CTX_INTEGER;
            to->integer.x86_64_regs.rax = from->Rax;
            to->integer.x86_64_regs.rcx = from->Rcx;
            to->integer.x86_64_regs.rdx = from->Rdx;
            to->integer.x86_64_regs.rbx = from->Rbx;
            to->integer.x86_64_regs.rsi = from->Rsi;
            to->integer.x86_64_regs.rdi = from->Rdi;
            to->integer.x86_64_regs.r8  = from->R8;
            to->integer.x86_64_regs.r9  = from->R9;
            to->integer.x86_64_regs.r10 = from->R10;
            to->integer.x86_64_regs.r11 = from->R11;
            to->integer.x86_64_regs.r12 = from->R12;
            to->integer.x86_64_regs.r13 = from->R13;
            to->integer.x86_64_regs.r14 = from->R14;
            to->integer.x86_64_regs.r15 = from->R15;
        }
        if (flags & CONTEXT_AMD64_SEGMENTS)
        {
            to->flags |= SERVER_CTX_SEGMENTS;
            to->seg.x86_64_regs.ds = from->SegDs;
            to->seg.x86_64_regs.es = from->SegEs;
            to->seg.x86_64_regs.fs = from->SegFs;
            to->seg.x86_64_regs.gs = from->SegGs;
        }
        if (flags & CONTEXT_AMD64_FLOATING_POINT)
        {
            to->flags |= SERVER_CTX_FLOATING_POINT;
            memcpy( to->fp.x86_64_regs.fpregs, &from->u.FltSave, sizeof(to->fp.x86_64_regs.fpregs) );
        }
        if (flags & CONTEXT_AMD64_DEBUG_REGISTERS)
        {
            to->flags |= SERVER_CTX_DEBUG_REGISTERS;
            to->debug.x86_64_regs.dr0 = from->Dr0;
            to->debug.x86_64_regs.dr1 = from->Dr1;
            to->debug.x86_64_regs.dr2 = from->Dr2;
            to->debug.x86_64_regs.dr3 = from->Dr3;
            to->debug.x86_64_regs.dr6 = from->Dr6;
            to->debug.x86_64_regs.dr7 = from->Dr7;
        }
        if (flags & CONTEXT_AMD64_XSTATE)
        {
            const CONTEXT_EX *xctx = (const CONTEXT_EX *)(from + 1);
            const XSTATE *xs = (const XSTATE *)((const char *)xctx + xctx->XState.Offset);

            to->flags |= SERVER_CTX_YMM_REGISTERS;
            if (xs->Mask & 4)
                memcpy( &to->ymm.ymm_high_regs.ymm_high, &xs->YmmContext, sizeof(xs->YmmContext) );
        }
        return STATUS_SUCCESS;
    }

    case IMAGE_FILE_MACHINE_ARMNT:
    {
        const ARM_CONTEXT *from = src;

        flags = from->ContextFlags & ~CONTEXT_ARM;
        if (flags & CONTEXT_ARM_CONTROL)
        {
            to->flags |= SERVER_CTX_CONTROL;
            to->ctl.arm_regs.sp   = from->Sp;
            to->ctl.arm_regs.lr   = from->Lr;
            to->ctl.arm_regs.pc   = from->Pc;
            to->ctl.arm_regs.cpsr = from->Cpsr;
        }
        if (flags & CONTEXT_ARM_INTEGER)
        {
            to->flags |= SERVER_CTX_INTEGER;
            to->integer.arm_regs.r[0]  = from->R0;
            to->integer.arm_regs.r[1]  = from->R1;
            to->integer.arm_regs.r[2]  = from->R2;
            to->integer.arm_regs.r[3]  = from->R3;
            to->integer.arm_regs.r[4]  = from->R4;
            to->integer.arm_regs.r[5]  = from->R5;
            to->integer.arm_regs.r[6]  = from->R6;
            to->integer.arm_regs.r[7]  = from->R7;
            to->integer.arm_regs.r[8]  = from->R8;
            to->integer.arm_regs.r[9]  = from->R9;
            to->integer.arm_regs.r[10] = from->R10;
            to->integer.arm_regs.r[11] = from->R11;
            to->integer.arm_regs.r[12] = from->R12;
        }
        if (flags & CONTEXT_ARM_FLOATING_POINT)
        {
            to->flags |= SERVER_CTX_FLOATING_POINT;
            for (i = 0; i < 32; i++) to->fp.arm_regs.d[i] = from->u.D[i];
            to->fp.arm_regs.fpscr = from->Fpscr;
        }
        if (flags & CONTEXT_ARM_DEBUG_REGISTERS)
        {
            to->flags |= SERVER_CTX_DEBUG_REGISTERS;
            for (i = 0; i < ARM_MAX_BREAKPOINTS; i++) to->debug.arm_regs.bvr[i] = from->Bvr[i];
            for (i = 0; i < ARM_MAX_BREAKPOINTS; i++) to->debug.arm_regs.bcr[i] = from->Bcr[i];
            for (i = 0; i < ARM_MAX_WATCHPOINTS; i++) to->debug.arm_regs.wvr[i] = from->Wvr[i];
            for (i = 0; i < ARM_MAX_WATCHPOINTS; i++) to->debug.arm_regs.wcr[i] = from->Wcr[i];
        }
        return STATUS_SUCCESS;
    }

    case IMAGE_FILE_MACHINE_ARM64:
    {
        const ARM64_NT_CONTEXT *from = src;

        flags = from->ContextFlags & ~CONTEXT_ARM64;
        if (flags & CONTEXT_ARM64_CONTROL)
        {
            to->flags |= SERVER_CTX_CONTROL;
            to->integer.arm64_regs.x[29] = from->u.s.Fp;
            to->integer.arm64_regs.x[30] = from->u.s.Lr;
            to->ctl.arm64_regs.sp     = from->Sp;
            to->ctl.arm64_regs.pc     = from->Pc;
            to->ctl.arm64_regs.pstate = from->Cpsr;
        }
        if (flags & CONTEXT_ARM64_INTEGER)
        {
            to->flags |= SERVER_CTX_INTEGER;
            for (i = 0; i <= 28; i++) to->integer.arm64_regs.x[i] = from->u.X[i];
        }
        if (flags & CONTEXT_ARM64_FLOATING_POINT)
        {
            to->flags |= SERVER_CTX_FLOATING_POINT;
            for (i = 0; i < 32; i++)
            {
                to->fp.arm64_regs.q[i].low = from->V[i].s.Low;
                to->fp.arm64_regs.q[i].high = from->V[i].s.High;
            }
            to->fp.arm64_regs.fpcr = from->Fpcr;
            to->fp.arm64_regs.fpsr = from->Fpsr;
        }
        if (flags & CONTEXT_ARM64_DEBUG_REGISTERS)
        {
            to->flags |= SERVER_CTX_DEBUG_REGISTERS;
            for (i = 0; i < ARM64_MAX_BREAKPOINTS; i++) to->debug.arm64_regs.bcr[i] = from->Bcr[i];
            for (i = 0; i < ARM64_MAX_BREAKPOINTS; i++) to->debug.arm64_regs.bvr[i] = from->Bvr[i];
            for (i = 0; i < ARM64_MAX_WATCHPOINTS; i++) to->debug.arm64_regs.wcr[i] = from->Wcr[i];
            for (i = 0; i < ARM64_MAX_WATCHPOINTS; i++) to->debug.arm64_regs.wvr[i] = from->Wvr[i];
        }
        return STATUS_SUCCESS;
    }

    default:
        return STATUS_INVALID_PARAMETER;
    }
}


/***********************************************************************
 *           context_from_server
 *
 * Convert a register context from the server format.
 */
static NTSTATUS context_from_server( void *dst, const context_t *from, USHORT machine )
{
    DWORD i;

    /* special case for WoW64 (FIXME) */
    if (machine == IMAGE_FILE_MACHINE_AMD64 && from->machine == IMAGE_FILE_MACHINE_I386)
    {
        AMD64_CONTEXT *to = dst;

        to->ContextFlags = CONTEXT_AMD64;
        if (from->flags & SERVER_CTX_CONTROL)
        {
            to->ContextFlags |= CONTEXT_AMD64_CONTROL;
            to->Rbp    = from->ctl.i386_regs.ebp;
            to->Rip    = from->ctl.i386_regs.eip;
            to->Rsp    = from->ctl.i386_regs.esp;
            to->SegCs  = from->ctl.i386_regs.cs;
            to->SegSs  = from->ctl.i386_regs.ss;
            to->EFlags = from->ctl.i386_regs.eflags;
        }

        if (from->flags & SERVER_CTX_INTEGER)
        {
            to->ContextFlags |= CONTEXT_AMD64_INTEGER;
            to->Rax = from->integer.i386_regs.eax;
            to->Rcx = from->integer.i386_regs.ecx;
            to->Rdx = from->integer.i386_regs.edx;
            to->Rbx = from->integer.i386_regs.ebx;
            to->Rsi = from->integer.i386_regs.esi;
            to->Rdi = from->integer.i386_regs.edi;
            to->R8  = 0;
            to->R9  = 0;
            to->R10 = 0;
            to->R11 = 0;
            to->R12 = 0;
            to->R13 = 0;
            to->R14 = 0;
            to->R15 = 0;
        }
        if (from->flags & SERVER_CTX_SEGMENTS)
        {
            to->ContextFlags |= CONTEXT_AMD64_SEGMENTS;
            to->SegDs = from->seg.i386_regs.ds;
            to->SegEs = from->seg.i386_regs.es;
            to->SegFs = from->seg.i386_regs.fs;
            to->SegGs = from->seg.i386_regs.gs;
        }
        if (from->flags & SERVER_CTX_FLOATING_POINT)
        {
            to->ContextFlags |= CONTEXT_AMD64_FLOATING_POINT;
            memset(&to->u.FltSave, 0, sizeof(to->u.FltSave));
        }
        if (from->flags & SERVER_CTX_DEBUG_REGISTERS)
        {
            to->ContextFlags |= CONTEXT_AMD64_DEBUG_REGISTERS;
            to->Dr0 = from->debug.i386_regs.dr0;
            to->Dr1 = from->debug.i386_regs.dr1;
            to->Dr2 = from->debug.i386_regs.dr2;
            to->Dr3 = from->debug.i386_regs.dr3;
            to->Dr6 = from->debug.i386_regs.dr6;
            to->Dr7 = from->debug.i386_regs.dr7;
        }
        return STATUS_SUCCESS;
    }

    if (from->machine != machine) return STATUS_INVALID_PARAMETER;

    switch (machine)
    {
    case IMAGE_FILE_MACHINE_I386:
    {
        I386_CONTEXT *to = dst;

        to->ContextFlags = CONTEXT_i386 | (to->ContextFlags & CONTEXT_I386_XSTATE);
        if (from->flags & SERVER_CTX_CONTROL)
        {
            to->ContextFlags |= CONTEXT_I386_CONTROL;
            to->Ebp    = from->ctl.i386_regs.ebp;
            to->Esp    = from->ctl.i386_regs.esp;
            to->Eip    = from->ctl.i386_regs.eip;
            to->SegCs  = from->ctl.i386_regs.cs;
            to->SegSs  = from->ctl.i386_regs.ss;
            to->EFlags = from->ctl.i386_regs.eflags;
        }
        if (from->flags & SERVER_CTX_INTEGER)
        {
            to->ContextFlags |= CONTEXT_I386_INTEGER;
            to->Eax = from->integer.i386_regs.eax;
            to->Ebx = from->integer.i386_regs.ebx;
            to->Ecx = from->integer.i386_regs.ecx;
            to->Edx = from->integer.i386_regs.edx;
            to->Esi = from->integer.i386_regs.esi;
            to->Edi = from->integer.i386_regs.edi;
        }
        if (from->flags & SERVER_CTX_SEGMENTS)
        {
            to->ContextFlags |= CONTEXT_I386_SEGMENTS;
            to->SegDs = from->seg.i386_regs.ds;
            to->SegEs = from->seg.i386_regs.es;
            to->SegFs = from->seg.i386_regs.fs;
            to->SegGs = from->seg.i386_regs.gs;
        }
        if (from->flags & SERVER_CTX_FLOATING_POINT)
        {
            to->ContextFlags |= CONTEXT_I386_FLOATING_POINT;
            to->FloatSave.ControlWord   = from->fp.i386_regs.ctrl;
            to->FloatSave.StatusWord    = from->fp.i386_regs.status;
            to->FloatSave.TagWord       = from->fp.i386_regs.tag;
            to->FloatSave.ErrorOffset   = from->fp.i386_regs.err_off;
            to->FloatSave.ErrorSelector = from->fp.i386_regs.err_sel;
            to->FloatSave.DataOffset    = from->fp.i386_regs.data_off;
            to->FloatSave.DataSelector  = from->fp.i386_regs.data_sel;
            to->FloatSave.Cr0NpxState   = from->fp.i386_regs.cr0npx;
            memcpy( to->FloatSave.RegisterArea, from->fp.i386_regs.regs, sizeof(to->FloatSave.RegisterArea) );
        }
        if (from->flags & SERVER_CTX_DEBUG_REGISTERS)
        {
            to->ContextFlags |= CONTEXT_I386_DEBUG_REGISTERS;
            to->Dr0 = from->debug.i386_regs.dr0;
            to->Dr1 = from->debug.i386_regs.dr1;
            to->Dr2 = from->debug.i386_regs.dr2;
            to->Dr3 = from->debug.i386_regs.dr3;
            to->Dr6 = from->debug.i386_regs.dr6;
            to->Dr7 = from->debug.i386_regs.dr7;
        }
        if (from->flags & SERVER_CTX_EXTENDED_REGISTERS)
        {
            to->ContextFlags |= CONTEXT_I386_EXTENDED_REGISTERS;
            memcpy( to->ExtendedRegisters, from->ext.i386_regs, sizeof(to->ExtendedRegisters) );
        }
        if (from->flags & SERVER_CTX_YMM_REGISTERS &&
            (to->ContextFlags & CONTEXT_I386_XSTATE) == CONTEXT_I386_XSTATE)
        {
            CONTEXT_EX *xctx = (CONTEXT_EX *)(to + 1);
            XSTATE *xs = (XSTATE *)((char *)xctx + xctx->XState.Offset);

            xs->Mask &= ~4;
            if (user_shared_data->XState.CompactionEnabled) xs->CompactionMask = 0x8000000000000004;
            for (i = 0; i < ARRAY_SIZE( from->ymm.ymm_high_regs.ymm_high); i++)
            {
                if (!from->ymm.ymm_high_regs.ymm_high[i].low && !from->ymm.ymm_high_regs.ymm_high[i].high)
                    continue;
                memcpy( &xs->YmmContext, &from->ymm.ymm_high_regs, sizeof(xs->YmmContext) );
                xs->Mask |= 4;
                break;
            }
        }
        return STATUS_SUCCESS;
    }

    case IMAGE_FILE_MACHINE_AMD64:
    {
        AMD64_CONTEXT *to = dst;

        to->ContextFlags = CONTEXT_AMD64 | (to->ContextFlags & CONTEXT_AMD64_XSTATE);
        if (from->flags & SERVER_CTX_CONTROL)
        {
            to->ContextFlags |= CONTEXT_AMD64_CONTROL;
            to->Rbp    = from->ctl.x86_64_regs.rbp;
            to->Rip    = from->ctl.x86_64_regs.rip;
            to->Rsp    = from->ctl.x86_64_regs.rsp;
            to->SegCs  = from->ctl.x86_64_regs.cs;
            to->SegSs  = from->ctl.x86_64_regs.ss;
            to->EFlags = from->ctl.x86_64_regs.flags;
        }

        if (from->flags & SERVER_CTX_INTEGER)
        {
            to->ContextFlags |= CONTEXT_AMD64_INTEGER;
            to->Rax = from->integer.x86_64_regs.rax;
            to->Rcx = from->integer.x86_64_regs.rcx;
            to->Rdx = from->integer.x86_64_regs.rdx;
            to->Rbx = from->integer.x86_64_regs.rbx;
            to->Rsi = from->integer.x86_64_regs.rsi;
            to->Rdi = from->integer.x86_64_regs.rdi;
            to->R8  = from->integer.x86_64_regs.r8;
            to->R9  = from->integer.x86_64_regs.r9;
            to->R10 = from->integer.x86_64_regs.r10;
            to->R11 = from->integer.x86_64_regs.r11;
            to->R12 = from->integer.x86_64_regs.r12;
            to->R13 = from->integer.x86_64_regs.r13;
            to->R14 = from->integer.x86_64_regs.r14;
            to->R15 = from->integer.x86_64_regs.r15;
        }
        if (from->flags & SERVER_CTX_SEGMENTS)
        {
            to->ContextFlags |= CONTEXT_AMD64_SEGMENTS;
            to->SegDs = from->seg.x86_64_regs.ds;
            to->SegEs = from->seg.x86_64_regs.es;
            to->SegFs = from->seg.x86_64_regs.fs;
            to->SegGs = from->seg.x86_64_regs.gs;
        }
        if (from->flags & SERVER_CTX_FLOATING_POINT)
        {
            to->ContextFlags |= CONTEXT_AMD64_FLOATING_POINT;
            memcpy( &to->u.FltSave, from->fp.x86_64_regs.fpregs, sizeof(from->fp.x86_64_regs.fpregs) );
            to->MxCsr = to->u.FltSave.MxCsr;
        }
        if (from->flags & SERVER_CTX_DEBUG_REGISTERS)
        {
            to->ContextFlags |= CONTEXT_AMD64_DEBUG_REGISTERS;
            to->Dr0 = from->debug.x86_64_regs.dr0;
            to->Dr1 = from->debug.x86_64_regs.dr1;
            to->Dr2 = from->debug.x86_64_regs.dr2;
            to->Dr3 = from->debug.x86_64_regs.dr3;
            to->Dr6 = from->debug.x86_64_regs.dr6;
            to->Dr7 = from->debug.x86_64_regs.dr7;
        }
        if (from->flags & SERVER_CTX_YMM_REGISTERS &&
            (to->ContextFlags & CONTEXT_AMD64_XSTATE) == CONTEXT_AMD64_XSTATE)
        {
            CONTEXT_EX *xctx = (CONTEXT_EX *)(to + 1);
            XSTATE *xs = (XSTATE *)((char *)xctx + xctx->XState.Offset);

            xs->Mask &= ~4;
            if (user_shared_data->XState.CompactionEnabled) xs->CompactionMask = 0x8000000000000004;
            for (i = 0; i < ARRAY_SIZE( from->ymm.ymm_high_regs.ymm_high); i++)
            {
                if (!from->ymm.ymm_high_regs.ymm_high[i].low && !from->ymm.ymm_high_regs.ymm_high[i].high)
                    continue;
                memcpy( &xs->YmmContext, &from->ymm.ymm_high_regs, sizeof(xs->YmmContext) );
                xs->Mask |= 4;
                break;
            }
        }
        return STATUS_SUCCESS;
    }

    case IMAGE_FILE_MACHINE_ARMNT:
    {
        ARM_CONTEXT *to = dst;

        to->ContextFlags = CONTEXT_ARM;
        if (from->flags & SERVER_CTX_CONTROL)
        {
            to->ContextFlags |= CONTEXT_ARM_CONTROL;
            to->Sp   = from->ctl.arm_regs.sp;
            to->Lr   = from->ctl.arm_regs.lr;
            to->Pc   = from->ctl.arm_regs.pc;
            to->Cpsr = from->ctl.arm_regs.cpsr;
        }
        if (from->flags & SERVER_CTX_INTEGER)
        {
            to->ContextFlags |= CONTEXT_ARM_INTEGER;
            to->R0  = from->integer.arm_regs.r[0];
            to->R1  = from->integer.arm_regs.r[1];
            to->R2  = from->integer.arm_regs.r[2];
            to->R3  = from->integer.arm_regs.r[3];
            to->R4  = from->integer.arm_regs.r[4];
            to->R5  = from->integer.arm_regs.r[5];
            to->R6  = from->integer.arm_regs.r[6];
            to->R7  = from->integer.arm_regs.r[7];
            to->R8  = from->integer.arm_regs.r[8];
            to->R9  = from->integer.arm_regs.r[9];
            to->R10 = from->integer.arm_regs.r[10];
            to->R11 = from->integer.arm_regs.r[11];
            to->R12 = from->integer.arm_regs.r[12];
        }
        if (from->flags & SERVER_CTX_FLOATING_POINT)
        {
            to->ContextFlags |= CONTEXT_ARM_FLOATING_POINT;
            for (i = 0; i < 32; i++) to->u.D[i] = from->fp.arm_regs.d[i];
            to->Fpscr = from->fp.arm_regs.fpscr;
        }
        if (from->flags & SERVER_CTX_DEBUG_REGISTERS)
        {
            to->ContextFlags |= CONTEXT_ARM_DEBUG_REGISTERS;
            for (i = 0; i < ARM_MAX_BREAKPOINTS; i++) to->Bvr[i] = from->debug.arm_regs.bvr[i];
            for (i = 0; i < ARM_MAX_BREAKPOINTS; i++) to->Bcr[i] = from->debug.arm_regs.bcr[i];
            for (i = 0; i < ARM_MAX_WATCHPOINTS; i++) to->Wvr[i] = from->debug.arm_regs.wvr[i];
            for (i = 0; i < ARM_MAX_WATCHPOINTS; i++) to->Wcr[i] = from->debug.arm_regs.wcr[i];
        }
        return STATUS_SUCCESS;
    }

    case IMAGE_FILE_MACHINE_ARM64:
    {
        ARM64_NT_CONTEXT *to = dst;

        to->ContextFlags = CONTEXT_ARM64;
        if (from->flags & SERVER_CTX_CONTROL)
        {
            to->ContextFlags |= CONTEXT_ARM64_CONTROL;
            to->u.s.Fp = from->integer.arm64_regs.x[29];
            to->u.s.Lr = from->integer.arm64_regs.x[30];
            to->Sp     = from->ctl.arm64_regs.sp;
            to->Pc     = from->ctl.arm64_regs.pc;
            to->Cpsr   = from->ctl.arm64_regs.pstate;
        }
        if (from->flags & SERVER_CTX_INTEGER)
        {
            to->ContextFlags |= CONTEXT_ARM64_INTEGER;
            for (i = 0; i <= 28; i++) to->u.X[i] = from->integer.arm64_regs.x[i];
        }
        if (from->flags & SERVER_CTX_FLOATING_POINT)
        {
            to->ContextFlags |= CONTEXT_ARM64_FLOATING_POINT;
            for (i = 0; i < 32; i++)
            {
                to->V[i].s.Low = from->fp.arm64_regs.q[i].low;
                to->V[i].s.High = from->fp.arm64_regs.q[i].high;
            }
            to->Fpcr = from->fp.arm64_regs.fpcr;
            to->Fpsr = from->fp.arm64_regs.fpsr;
        }
        if (from->flags & SERVER_CTX_DEBUG_REGISTERS)
        {
            to->ContextFlags |= CONTEXT_ARM64_DEBUG_REGISTERS;
            for (i = 0; i < ARM64_MAX_BREAKPOINTS; i++) to->Bcr[i] = from->debug.arm64_regs.bcr[i];
            for (i = 0; i < ARM64_MAX_BREAKPOINTS; i++) to->Bvr[i] = from->debug.arm64_regs.bvr[i];
            for (i = 0; i < ARM64_MAX_WATCHPOINTS; i++) to->Wcr[i] = from->debug.arm64_regs.wcr[i];
            for (i = 0; i < ARM64_MAX_WATCHPOINTS; i++) to->Wvr[i] = from->debug.arm64_regs.wvr[i];
        }
        return STATUS_SUCCESS;
    }

    default:
        return STATUS_INVALID_PARAMETER;
    }
}


/***********************************************************************
 *           pthread_exit_wrapper
 */
static void pthread_exit_wrapper( int status )
{
    close( ntdll_get_thread_data()->wait_fd[0] );
    close( ntdll_get_thread_data()->wait_fd[1] );
    close( ntdll_get_thread_data()->reply_fd );
    close( ntdll_get_thread_data()->request_fd );
    pthread_exit( UIntToPtr(status) );
}


/***********************************************************************
 *           start_thread
 *
 * Startup routine for a newly created thread.
 */
static void start_thread( TEB *teb )
{
    struct ntdll_thread_data *thread_data = (struct ntdll_thread_data *)&teb->GdiTebBatch;
    struct debug_info debug_info;
    BOOL suspend;

    debug_info.str_pos = debug_info.out_pos = 0;
    thread_data->debug_info = &debug_info;
    thread_data->pthread_id = pthread_self();
    signal_init_thread( teb );
    server_init_thread( thread_data->start, &suspend );
    signal_start_thread( thread_data->start, thread_data->param, suspend, pLdrInitializeThunk, teb );
}


/***********************************************************************
 *           get_machine_context_size
 */
static SIZE_T get_machine_context_size( USHORT machine )
{
    switch (machine)
    {
    case IMAGE_FILE_MACHINE_I386:  return sizeof(I386_CONTEXT);
    case IMAGE_FILE_MACHINE_ARMNT: return sizeof(ARM_CONTEXT);
    case IMAGE_FILE_MACHINE_AMD64: return sizeof(AMD64_CONTEXT);
    case IMAGE_FILE_MACHINE_ARM64: return sizeof(ARM64_NT_CONTEXT);
    default: return 0;
    }
}


/***********************************************************************
 *           set_thread_id
 */
void set_thread_id( TEB *teb, DWORD pid, DWORD tid )
{
    teb->ClientId.UniqueProcess = ULongToHandle( pid );
    teb->ClientId.UniqueThread  = ULongToHandle( tid );
    if (teb->WowTebOffset)
    {
#ifdef _WIN64
        TEB32 *teb32 = (TEB32 *)((char *)teb + teb->WowTebOffset);
        teb32->ClientId.UniqueProcess = pid;
        teb32->ClientId.UniqueThread  = tid;
#else
        TEB64 *teb64 = (TEB64 *)((char *)teb + teb->WowTebOffset);
        teb64->ClientId.UniqueProcess = pid;
        teb64->ClientId.UniqueThread  = tid;
#endif
    }
}


/***********************************************************************
 *           init_thread_stack
 */
NTSTATUS init_thread_stack( TEB *teb, ULONG_PTR zero_bits, SIZE_T reserve_size, SIZE_T commit_size )
{
    struct ntdll_thread_data *thread_data = (struct ntdll_thread_data *)&teb->GdiTebBatch;
    INITIAL_TEB stack;
    NTSTATUS status;

    if (teb->WowTebOffset)
    {
        WOW64_CPURESERVED *cpu;
        SIZE_T cpusize = sizeof(WOW64_CPURESERVED) +
            ((get_machine_context_size( main_image_info.Machine ) + 7) & ~7) + sizeof(ULONG64);

#ifdef _WIN64
        TEB32 *teb32 = (TEB32 *)((char *)teb + teb->WowTebOffset);

        /* 32-bit stack */
        if ((status = virtual_alloc_thread_stack( &stack, zero_bits, reserve_size, commit_size, 0 )))
            return status;
        teb32->Tib.StackBase = PtrToUlong( stack.StackBase );
        teb32->Tib.StackLimit = PtrToUlong( stack.StackLimit );
        teb32->DeallocationStack = PtrToUlong( stack.DeallocationStack );

        /* 64-bit stack */
        if ((status = virtual_alloc_thread_stack( &stack, 0, 0x40000, 0x40000, kernel_stack_size )))
            return status;
        cpu = (WOW64_CPURESERVED *)(((ULONG_PTR)stack.StackBase - cpusize) & ~15);
        cpu->Machine = main_image_info.Machine;
        teb->Tib.StackBase = teb->TlsSlots[WOW64_TLS_CPURESERVED] = cpu;
        teb->Tib.StackLimit = stack.StackLimit;
        teb->DeallocationStack = stack.DeallocationStack;
        thread_data->kernel_stack = stack.StackBase;
        return STATUS_SUCCESS;
#else
        TEB64 *teb64 = (TEB64 *)((char *)teb + teb->WowTebOffset);

        /* 64-bit stack */
        if ((status = virtual_alloc_thread_stack( &stack, 0, 0x40000, 0x40000, 0 ))) return status;

        cpu = (WOW64_CPURESERVED *)(((ULONG_PTR)stack.StackBase - cpusize) & ~15);
        cpu->Machine = main_image_info.Machine;
        teb64->Tib.StackBase = teb64->TlsSlots[WOW64_TLS_CPURESERVED] = PtrToUlong( cpu );
        teb64->Tib.StackLimit = PtrToUlong( stack.StackLimit );
        teb64->DeallocationStack = PtrToUlong( stack.DeallocationStack );
#endif
    }

    /* native stack */
    if ((status = virtual_alloc_thread_stack( &stack, zero_bits, reserve_size,
                                              commit_size, kernel_stack_size )))
        return status;
    teb->Tib.StackBase = stack.StackBase;
    teb->Tib.StackLimit = stack.StackLimit;
    teb->DeallocationStack = stack.DeallocationStack;
    thread_data->kernel_stack = stack.StackBase;
    return STATUS_SUCCESS;
}


/***********************************************************************
 *           update_attr_list
 *
 * Update the output attributes.
 */
static void update_attr_list( PS_ATTRIBUTE_LIST *attr, const CLIENT_ID *id, TEB *teb )
{
    SIZE_T i, count = (attr->TotalLength - sizeof(attr->TotalLength)) / sizeof(PS_ATTRIBUTE);

    for (i = 0; i < count; i++)
    {
        if (attr->Attributes[i].Attribute == PS_ATTRIBUTE_CLIENT_ID)
        {
            SIZE_T size = min( attr->Attributes[i].Size, sizeof(*id) );
            memcpy( attr->Attributes[i].ValuePtr, id, size );
            if (attr->Attributes[i].ReturnLength) *attr->Attributes[i].ReturnLength = size;
        }
        else if (attr->Attributes[i].Attribute == PS_ATTRIBUTE_TEB_ADDRESS)
        {
            SIZE_T size = min( attr->Attributes[i].Size, sizeof(teb) );
            memcpy( attr->Attributes[i].ValuePtr, &teb, size );
            if (attr->Attributes[i].ReturnLength) *attr->Attributes[i].ReturnLength = size;
        }
    }
}

/***********************************************************************
 *              NtCreateThread   (NTDLL.@)
 */
NTSTATUS WINAPI NtCreateThread( HANDLE *handle, ACCESS_MASK access, OBJECT_ATTRIBUTES *attr,
                                HANDLE process, CLIENT_ID *id, CONTEXT *ctx, INITIAL_TEB *teb,
                                BOOLEAN suspended )
{
    FIXME( "%p %d %p %p %p %p %p %d, stub!\n", handle, access, attr, process, id, ctx, teb, suspended );
    return STATUS_NOT_IMPLEMENTED;
}

/***********************************************************************
 *              NtCreateThreadEx   (NTDLL.@)
 */
NTSTATUS WINAPI NtCreateThreadEx( HANDLE *handle, ACCESS_MASK access, OBJECT_ATTRIBUTES *attr,
                                  HANDLE process, PRTL_THREAD_START_ROUTINE start, void *param,
                                  ULONG flags, ULONG_PTR zero_bits, SIZE_T stack_commit,
                                  SIZE_T stack_reserve, PS_ATTRIBUTE_LIST *attr_list )
{
    sigset_t sigset;
    pthread_t pthread_id;
    pthread_attr_t pthread_attr;
    data_size_t len;
    struct object_attributes *objattr;
    struct ntdll_thread_data *thread_data;
    DWORD tid = 0;
    int request_pipe[2];
    TEB *teb;
    NTSTATUS status;

    if (zero_bits > 21 && zero_bits < 32) return STATUS_INVALID_PARAMETER_3;
#ifndef _WIN64
    if (!is_wow64 && zero_bits >= 32) return STATUS_INVALID_PARAMETER_3;
#endif

    if (process != NtCurrentProcess())
    {
        apc_call_t call;
        apc_result_t result;

        memset( &call, 0, sizeof(call) );

        call.create_thread.type      = APC_CREATE_THREAD;
        call.create_thread.flags     = flags;
        call.create_thread.func      = wine_server_client_ptr( start );
        call.create_thread.arg       = wine_server_client_ptr( param );
        call.create_thread.zero_bits = zero_bits;
        call.create_thread.reserve   = stack_reserve;
        call.create_thread.commit    = stack_commit;
        status = server_queue_process_apc( process, &call, &result );
        if (status != STATUS_SUCCESS) return status;

        if (result.create_thread.status == STATUS_SUCCESS)
        {
            CLIENT_ID client_id;
            TEB *teb = wine_server_get_ptr( result.create_thread.teb );
            *handle = wine_server_ptr_handle( result.create_thread.handle );
            client_id.UniqueProcess = ULongToHandle( result.create_thread.pid );
            client_id.UniqueThread  = ULongToHandle( result.create_thread.tid );
            if (attr_list) update_attr_list( attr_list, &client_id, teb );
        }
        return result.create_thread.status;
    }

    if ((status = alloc_object_attributes( attr, &objattr, &len ))) return status;

    if (server_pipe( request_pipe ) == -1)
    {
        free( objattr );
        return STATUS_TOO_MANY_OPENED_FILES;
    }
    wine_server_send_fd( request_pipe[0] );

    if (!access) access = THREAD_ALL_ACCESS;

    SERVER_START_REQ( new_thread )
    {
        req->process    = wine_server_obj_handle( process );
        req->access     = access;
        req->suspend    = flags & THREAD_CREATE_FLAGS_CREATE_SUSPENDED;
        req->request_fd = request_pipe[0];
        wine_server_add_data( req, objattr, len );
        if (!(status = wine_server_call( req )))
        {
            *handle = wine_server_ptr_handle( reply->handle );
            tid = reply->tid;
        }
        close( request_pipe[0] );
    }
    SERVER_END_REQ;

    free( objattr );
    if (status)
    {
        close( request_pipe[1] );
        return status;
    }

    pthread_sigmask( SIG_BLOCK, &server_block_set, &sigset );

    if ((status = virtual_alloc_teb( &teb ))) goto done;

    if ((status = init_thread_stack( teb, zero_bits, stack_reserve, stack_commit )))
    {
        virtual_free_teb( teb );
        goto done;
    }

    set_thread_id( teb, GetCurrentProcessId(), tid );

    thread_data = (struct ntdll_thread_data *)&teb->GdiTebBatch;
    thread_data->request_fd  = request_pipe[1];
    thread_data->start = start;
    thread_data->param = param;

    pthread_attr_init( &pthread_attr );
    pthread_attr_setstack( &pthread_attr, teb->DeallocationStack,
                           (char *)thread_data->kernel_stack + kernel_stack_size - (char *)teb->DeallocationStack );
    pthread_attr_setguardsize( &pthread_attr, 0 );
    pthread_attr_setscope( &pthread_attr, PTHREAD_SCOPE_SYSTEM ); /* force creating a kernel thread */
    InterlockedIncrement( &nb_threads );
    if (pthread_create( &pthread_id, &pthread_attr, (void * (*)(void *))start_thread, teb ))
    {
        InterlockedDecrement( &nb_threads );
        virtual_free_teb( teb );
        status = STATUS_NO_MEMORY;
    }
    pthread_attr_destroy( &pthread_attr );

done:
    pthread_sigmask( SIG_SETMASK, &sigset, NULL );
    if (status)
    {
        NtClose( *handle );
        close( request_pipe[1] );
        return status;
    }
    if (attr_list) update_attr_list( attr_list, &teb->ClientId, teb );
    return STATUS_SUCCESS;
}


/***********************************************************************
 *           abort_thread
 */
void abort_thread( int status )
{
    pthread_sigmask( SIG_BLOCK, &server_block_set, NULL );
    if (InterlockedDecrement( &nb_threads ) <= 0) abort_process( status );
    signal_exit_thread( status, pthread_exit_wrapper );
}


/***********************************************************************
 *           abort_process
 */
void abort_process( int status )
{
    _exit( get_unix_exit_code( status ));
}


/***********************************************************************
 *           exit_thread
 */
static DECLSPEC_NORETURN void exit_thread( int status )
{
    static void *prev_teb;
    TEB *teb;

    pthread_sigmask( SIG_BLOCK, &server_block_set, NULL );

    if ((teb = InterlockedExchangePointer( &prev_teb, NtCurrentTeb() )))
    {
        struct ntdll_thread_data *thread_data = (struct ntdll_thread_data *)&teb->GdiTebBatch;

        if (thread_data->pthread_id)
        {
            pthread_join( thread_data->pthread_id, NULL );
            virtual_free_teb( teb );
        }
    }
    signal_exit_thread( status, pthread_exit_wrapper );
}


/***********************************************************************
 *           exit_process
 */
void exit_process( int status )
{
    pthread_sigmask( SIG_BLOCK, &server_block_set, NULL );
    signal_exit_thread( get_unix_exit_code( status ), process_exit_wrapper );
}


/**********************************************************************
 *           wait_suspend
 *
 * Wait until the thread is no longer suspended.
 */
void wait_suspend( CONTEXT *context )
{
    int saved_errno = errno;
    context_t server_context;

    context_to_server( &server_context, context, current_machine );
    /* wait with 0 timeout, will only return once the thread is no longer suspended */
    server_select( NULL, 0, SELECT_INTERRUPTIBLE, 0, &server_context, NULL, NULL );
    context_from_server( context, &server_context, current_machine );
    errno = saved_errno;
}


/**********************************************************************
 *           send_debug_event
 *
 * Send an EXCEPTION_DEBUG_EVENT event to the debugger.
 */
NTSTATUS send_debug_event( EXCEPTION_RECORD *rec, CONTEXT *context, BOOL first_chance )
{
    NTSTATUS ret;
    DWORD i;
    obj_handle_t handle = 0;
    client_ptr_t params[EXCEPTION_MAXIMUM_PARAMETERS];
    select_op_t select_op;
    sigset_t old_set;

    if (!NtCurrentTeb()->Peb->BeingDebugged) return 0;  /* no debugger present */

    pthread_sigmask( SIG_BLOCK, &server_block_set, &old_set );

    for (i = 0; i < min( rec->NumberParameters, EXCEPTION_MAXIMUM_PARAMETERS ); i++)
        params[i] = rec->ExceptionInformation[i];

    SERVER_START_REQ( queue_exception_event )
    {
        req->first   = first_chance;
        req->code    = rec->ExceptionCode;
        req->flags   = rec->ExceptionFlags;
        req->record  = wine_server_client_ptr( rec->ExceptionRecord );
        req->address = wine_server_client_ptr( rec->ExceptionAddress );
        req->len     = i * sizeof(params[0]);
        wine_server_add_data( req, params, req->len );
        if (!(ret = wine_server_call( req ))) handle = reply->handle;
    }
    SERVER_END_REQ;

    if (handle)
    {
        context_t server_context;

        select_op.wait.op = SELECT_WAIT;
        select_op.wait.handles[0] = handle;

        context_to_server( &server_context, context, current_machine );

        server_select( &select_op, offsetof( select_op_t, wait.handles[1] ), SELECT_INTERRUPTIBLE,
                       TIMEOUT_INFINITE, &server_context, NULL, NULL );

        SERVER_START_REQ( get_exception_status )
        {
            req->handle = handle;
            ret = wine_server_call( req );
        }
        SERVER_END_REQ;
        if (ret >= 0) context_from_server( context, &server_context, current_machine );
    }

    pthread_sigmask( SIG_SETMASK, &old_set, NULL );
    return ret;
}


/*******************************************************************
 *              NtRaiseException (NTDLL.@)
 */
NTSTATUS WINAPI NtRaiseException( EXCEPTION_RECORD *rec, CONTEXT *context, BOOL first_chance )
{
    NTSTATUS status = send_debug_event( rec, context, first_chance );

    if (status == DBG_CONTINUE || status == DBG_EXCEPTION_HANDLED)
        return NtContinue( context, FALSE );

    if (first_chance) return call_user_exception_dispatcher( rec, context, pKiUserExceptionDispatcher );

    if (rec->ExceptionFlags & EH_STACK_INVALID)
        ERR_(seh)("Exception frame is not in stack limits => unable to dispatch exception.\n");
    else if (rec->ExceptionCode == STATUS_NONCONTINUABLE_EXCEPTION)
        ERR_(seh)("Process attempted to continue execution after noncontinuable exception.\n");
    else
        ERR_(seh)("Unhandled exception code %x flags %x addr %p\n",
                  rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress );

    NtTerminateProcess( NtCurrentProcess(), rec->ExceptionCode );
    return STATUS_SUCCESS;
}


/***********************************************************************
 *              NtOpenThread   (NTDLL.@)
 */
NTSTATUS WINAPI NtOpenThread( HANDLE *handle, ACCESS_MASK access,
                              const OBJECT_ATTRIBUTES *attr, const CLIENT_ID *id )
{
    NTSTATUS ret;

    SERVER_START_REQ( open_thread )
    {
        req->tid        = HandleToULong(id->UniqueThread);
        req->access     = access;
        req->attributes = attr ? attr->Attributes : 0;
        ret = wine_server_call( req );
        *handle = wine_server_ptr_handle( reply->handle );
    }
    SERVER_END_REQ;
    return ret;
}


/******************************************************************************
 *              NtSuspendThread   (NTDLL.@)
 */
NTSTATUS WINAPI NtSuspendThread( HANDLE handle, ULONG *count )
{
    NTSTATUS ret;

    SERVER_START_REQ( suspend_thread )
    {
        req->handle = wine_server_obj_handle( handle );
        if (!(ret = wine_server_call( req )))
        {
            if (count) *count = reply->count;
        }
    }
    SERVER_END_REQ;
    return ret;
}


/******************************************************************************
 *              NtResumeThread   (NTDLL.@)
 */
NTSTATUS WINAPI NtResumeThread( HANDLE handle, ULONG *count )
{
    NTSTATUS ret;

    SERVER_START_REQ( resume_thread )
    {
        req->handle = wine_server_obj_handle( handle );
        if (!(ret = wine_server_call( req )))
        {
            if (count) *count = reply->count;
        }
    }
    SERVER_END_REQ;
    return ret;
}


/******************************************************************************
 *              NtAlertResumeThread   (NTDLL.@)
 */
NTSTATUS WINAPI NtAlertResumeThread( HANDLE handle, ULONG *count )
{
    FIXME( "stub: should alert thread %p\n", handle );
    return NtResumeThread( handle, count );
}


/******************************************************************************
 *              NtAlertThread   (NTDLL.@)
 */
NTSTATUS WINAPI NtAlertThread( HANDLE handle )
{
    FIXME( "stub: %p\n", handle );
    return STATUS_NOT_IMPLEMENTED;
}


/******************************************************************************
 *              NtTerminateThread  (NTDLL.@)
 */
NTSTATUS WINAPI NtTerminateThread( HANDLE handle, LONG exit_code )
{
    NTSTATUS ret;
    BOOL self = (handle == GetCurrentThread());

    if (!self || exit_code)
    {
        SERVER_START_REQ( terminate_thread )
        {
            req->handle    = wine_server_obj_handle( handle );
            req->exit_code = exit_code;
            ret = wine_server_call( req );
            self = !ret && reply->self;
        }
        SERVER_END_REQ;
    }
    if (self) exit_thread( exit_code );
    return ret;
}


/******************************************************************************
 *              NtQueueApcThread  (NTDLL.@)
 */
NTSTATUS WINAPI NtQueueApcThread( HANDLE handle, PNTAPCFUNC func, ULONG_PTR arg1,
                                  ULONG_PTR arg2, ULONG_PTR arg3 )
{
    NTSTATUS ret;

    SERVER_START_REQ( queue_apc )
    {
        req->handle = wine_server_obj_handle( handle );
        if (func)
        {
            req->call.type         = APC_USER;
            req->call.user.func    = wine_server_client_ptr( func );
            req->call.user.args[0] = arg1;
            req->call.user.args[1] = arg2;
            req->call.user.args[2] = arg3;
        }
        else req->call.type = APC_NONE;  /* wake up only */
        ret = wine_server_call( req );
    }
    SERVER_END_REQ;
    return ret;
}


/***********************************************************************
 *              set_thread_context
 */
NTSTATUS set_thread_context( HANDLE handle, const void *context, BOOL *self, USHORT machine )
{
    context_t server_context;
    NTSTATUS ret;

    context_to_server( &server_context, context, machine );
    SERVER_START_REQ( set_thread_context )
    {
        req->handle  = wine_server_obj_handle( handle );
        wine_server_add_data( req, &server_context, sizeof(server_context) );
        ret = wine_server_call( req );
        *self = reply->self;
    }
    SERVER_END_REQ;

    return ret;
}


/***********************************************************************
 *              get_thread_context
 */
NTSTATUS get_thread_context( HANDLE handle, void *context, BOOL *self, USHORT machine )
{
    NTSTATUS ret;
    context_t server_context;
    unsigned int flags = get_server_context_flags( context, machine );

    SERVER_START_REQ( get_thread_context )
    {
        req->handle  = wine_server_obj_handle( handle );
        req->flags   = flags;
        wine_server_set_reply( req, &server_context, sizeof(server_context) );
        ret = wine_server_call( req );
        *self = reply->self;
        handle = wine_server_ptr_handle( reply->handle );
    }
    SERVER_END_REQ;

    if (ret == STATUS_PENDING)
    {
        NtWaitForSingleObject( handle, FALSE, NULL );

        SERVER_START_REQ( get_thread_context )
        {
            req->handle  = wine_server_obj_handle( handle );
            req->flags   = flags;
            wine_server_set_reply( req, &server_context, sizeof(server_context) );
            ret = wine_server_call( req );
        }
        SERVER_END_REQ;
    }
    if (!ret) ret = context_from_server( context, &server_context, machine );
    return ret;
}


BOOL get_thread_times(int unix_pid, int unix_tid, LARGE_INTEGER *kernel_time, LARGE_INTEGER *user_time)
{
#ifdef linux
    unsigned long clocks_per_sec = sysconf( _SC_CLK_TCK );
    unsigned long usr, sys;
    const char *pos;
    char buf[512];
    FILE *f;
    int i;

    if (unix_tid == -1)
        sprintf( buf, "/proc/%u/stat", unix_pid );
    else
        sprintf( buf, "/proc/%u/task/%u/stat", unix_pid, unix_tid );
    if (!(f = fopen( buf, "r" )))
    {
        WARN("Failed to open %s: %s\n", buf, strerror(errno));
        return FALSE;
    }

    pos = fgets( buf, sizeof(buf), f );
    fclose( f );

    /* the process name is printed unescaped, so we have to skip to the last ')'
     * to avoid misinterpreting the string */
    if (pos) pos = strrchr( pos, ')' );
    if (pos) pos = strchr( pos + 1, ' ' );
    if (pos) pos++;

    /* skip over the following fields: state, ppid, pgid, sid, tty_nr, tty_pgrp,
     * task->flags, min_flt, cmin_flt, maj_flt, cmaj_flt */
    for (i = 0; i < 11 && pos; i++)
    {
        pos = strchr( pos + 1, ' ' );
        if (pos) pos++;
    }

    /* the next two values are user and system time */
    if (pos && (sscanf( pos, "%lu %lu", &usr, &sys ) == 2))
    {
        kernel_time->QuadPart = (ULONGLONG)sys * 10000000 / clocks_per_sec;
        user_time->QuadPart = (ULONGLONG)usr * 10000000 / clocks_per_sec;
        return TRUE;
    }

    ERR("Failed to parse %s\n", debugstr_a(buf));
    return FALSE;
#elif defined(HAVE_LIBPROCSTAT)
    struct procstat *pstat;
    struct kinfo_proc *kip;
    unsigned int proc_count;
    BOOL ret = FALSE;

    pstat = procstat_open_sysctl();
    if (!pstat)
        return FALSE;
    if (unix_tid == -1)
        kip = procstat_getprocs(pstat, KERN_PROC_PID, unix_pid, &proc_count);
    else
        kip = procstat_getprocs(pstat, KERN_PROC_PID | KERN_PROC_INC_THREAD, unix_pid, &proc_count);
    if (kip)
    {
        unsigned int i;
        for (i = 0; i < proc_count; i++)
        {
            if (unix_tid == -1 || kip[i].ki_tid == unix_tid)
            {
                kernel_time->QuadPart = 10000000 * (ULONGLONG)kip[i].ki_rusage.ru_stime.tv_sec +
                    10 * (ULONGLONG)kip[i].ki_rusage.ru_stime.tv_usec;
                user_time->QuadPart = 10000000 * (ULONGLONG)kip[i].ki_rusage.ru_utime.tv_sec +
                    10 * (ULONGLONG)kip[i].ki_rusage.ru_utime.tv_usec;
                ret = TRUE;
                break;
            }
        }
        procstat_freeprocs(pstat, kip);
    }
    procstat_close(pstat);
    return ret;
#else
    static int once;
    if (!once++) FIXME("not implemented on this platform\n");
    return FALSE;
#endif
}

#ifndef _WIN64
static BOOL is_process_wow64( const CLIENT_ID *id )
{
    HANDLE handle;
    ULONG_PTR info;
    BOOL ret = FALSE;

    if (id->UniqueProcess == ULongToHandle(GetCurrentProcessId())) return is_wow64;
    if (!NtOpenProcess( &handle, PROCESS_QUERY_LIMITED_INFORMATION, NULL, id ))
    {
        if (!NtQueryInformationProcess( handle, ProcessWow64Information, &info, sizeof(info), NULL ))
            ret = !!info;
        NtClose( handle );
    }
    return ret;
}
#endif

/******************************************************************************
 *              NtQueryInformationThread  (NTDLL.@)
 */
NTSTATUS WINAPI NtQueryInformationThread( HANDLE handle, THREADINFOCLASS class,
                                          void *data, ULONG length, ULONG *ret_len )
{
    NTSTATUS status;

    TRACE("(%p,%d,%p,%x,%p)\n", handle, class, data, length, ret_len);

    switch (class)
    {
    case ThreadBasicInformation:
    {
        THREAD_BASIC_INFORMATION info;
        const ULONG_PTR affinity_mask = get_system_affinity_mask();

        SERVER_START_REQ( get_thread_info )
        {
            req->handle = wine_server_obj_handle( handle );
            if (!(status = wine_server_call( req )))
            {
                info.ExitStatus             = reply->exit_code;
                info.TebBaseAddress         = wine_server_get_ptr( reply->teb );
                info.ClientId.UniqueProcess = ULongToHandle(reply->pid);
                info.ClientId.UniqueThread  = ULongToHandle(reply->tid);
                info.AffinityMask           = reply->affinity & affinity_mask;
                info.Priority               = reply->priority;
                info.BasePriority           = reply->priority;  /* FIXME */
            }
        }
        SERVER_END_REQ;
        if (status == STATUS_SUCCESS)
        {
#ifndef _WIN64
            if (is_wow64)
            {
                if (is_process_wow64( &info.ClientId ))
                    info.TebBaseAddress = (char *)info.TebBaseAddress + teb_offset;
                else
                    info.TebBaseAddress = NULL;
            }
#endif
            if (data) memcpy( data, &info, min( length, sizeof(info) ));
            if (ret_len) *ret_len = min( length, sizeof(info) );
        }
        return status;
    }

    case ThreadAffinityMask:
    {
        const ULONG_PTR affinity_mask = get_system_affinity_mask();
        ULONG_PTR affinity = 0;

        SERVER_START_REQ( get_thread_info )
        {
            req->handle = wine_server_obj_handle( handle );
            req->access = THREAD_QUERY_INFORMATION;
            if (!(status = wine_server_call( req ))) affinity = reply->affinity & affinity_mask;
        }
        SERVER_END_REQ;
        if (status == STATUS_SUCCESS)
        {
            if (data) memcpy( data, &affinity, min( length, sizeof(affinity) ));
            if (ret_len) *ret_len = min( length, sizeof(affinity) );
        }
        return status;
    }

    case ThreadTimes:
    {
        KERNEL_USER_TIMES kusrt;
        int unix_pid, unix_tid;

        SERVER_START_REQ( get_thread_times )
        {
            req->handle = wine_server_obj_handle( handle );
            status = wine_server_call( req );
            if (status == STATUS_SUCCESS)
            {
                kusrt.CreateTime.QuadPart = reply->creation_time;
                kusrt.ExitTime.QuadPart = reply->exit_time;
                unix_pid = reply->unix_pid;
                unix_tid = reply->unix_tid;
            }
        }
        SERVER_END_REQ;
        if (status == STATUS_SUCCESS)
        {
            BOOL ret = FALSE;

            kusrt.KernelTime.QuadPart = kusrt.UserTime.QuadPart = 0;
            if (unix_pid != -1 && unix_tid != -1)
                ret = get_thread_times( unix_pid, unix_tid, &kusrt.KernelTime, &kusrt.UserTime );
            if (!ret && handle == GetCurrentThread())
            {
                /* fall back to process times */
                struct tms time_buf;
                long clocks_per_sec = sysconf(_SC_CLK_TCK);

                times(&time_buf);
                kusrt.KernelTime.QuadPart = (ULONGLONG)time_buf.tms_stime * 10000000 / clocks_per_sec;
                kusrt.UserTime.QuadPart = (ULONGLONG)time_buf.tms_utime * 10000000 / clocks_per_sec;
            }
            if (data) memcpy( data, &kusrt, min( length, sizeof(kusrt) ));
            if (ret_len) *ret_len = min( length, sizeof(kusrt) );
        }
        return status;
    }

    case ThreadDescriptorTableEntry:
        return get_thread_ldt_entry( handle, data, length, ret_len );

    case ThreadAmILastThread:
    {
        if (length != sizeof(ULONG)) return STATUS_INFO_LENGTH_MISMATCH;
        SERVER_START_REQ( get_thread_info )
        {
            req->handle = wine_server_obj_handle( handle );
            status = wine_server_call( req );
            if (status == STATUS_SUCCESS)
            {
                ULONG last = reply->last;
                if (data) memcpy( data, &last, sizeof(last) );
                if (ret_len) *ret_len = sizeof(last);
            }
        }
        SERVER_END_REQ;
        return status;
    }

    case ThreadQuerySetWin32StartAddress:
    {
        SERVER_START_REQ( get_thread_info )
        {
            req->handle = wine_server_obj_handle( handle );
            req->access = THREAD_QUERY_INFORMATION;
            status = wine_server_call( req );
            if (status == STATUS_SUCCESS)
            {
                PRTL_THREAD_START_ROUTINE entry = wine_server_get_ptr( reply->entry_point );
                if (data) memcpy( data, &entry, min( length, sizeof(entry) ) );
                if (ret_len) *ret_len = min( length, sizeof(entry) );
            }
        }
        SERVER_END_REQ;
        return status;
    }

    case ThreadGroupInformation:
    {
        const ULONG_PTR affinity_mask = get_system_affinity_mask();
        GROUP_AFFINITY affinity;

        memset( &affinity, 0, sizeof(affinity) );
        affinity.Group = 0; /* Wine only supports max 64 processors */

        SERVER_START_REQ( get_thread_info )
        {
            req->handle = wine_server_obj_handle( handle );
            if (!(status = wine_server_call( req ))) affinity.Mask = reply->affinity & affinity_mask;
        }
        SERVER_END_REQ;
        if (status == STATUS_SUCCESS)
        {
            if (data) memcpy( data, &affinity, min( length, sizeof(affinity) ));
            if (ret_len) *ret_len = min( length, sizeof(affinity) );
        }
        return status;
    }

    case ThreadIsIoPending:
        FIXME( "ThreadIsIoPending info class not supported yet\n" );
        if (length != sizeof(BOOL)) return STATUS_INFO_LENGTH_MISMATCH;
        if (!data) return STATUS_ACCESS_DENIED;
        *(BOOL*)data = FALSE;
        if (ret_len) *ret_len = sizeof(BOOL);
        return STATUS_SUCCESS;

    case ThreadSuspendCount:
        if (length != sizeof(ULONG)) return STATUS_INFO_LENGTH_MISMATCH;
        if (!data) return STATUS_ACCESS_VIOLATION;

        SERVER_START_REQ( get_thread_info )
        {
            req->handle = wine_server_obj_handle( handle );
            if (!(status = wine_server_call( req ))) *(ULONG *)data = reply->suspend_count;
        }
        SERVER_END_REQ;
        return status;

    case ThreadDescription:
    {
        THREAD_DESCRIPTION_INFORMATION *info = data;
        data_size_t len, desc_len = 0;
        WCHAR *ptr;

        len = length >= sizeof(*info) ? length - sizeof(*info) : 0;
        ptr = info ? (WCHAR *)(info + 1) : NULL;

        SERVER_START_REQ( get_thread_info )
        {
            req->handle = wine_server_obj_handle( handle );
            if (ptr) wine_server_set_reply( req, ptr, len );
            status = wine_server_call( req );
            desc_len = reply->desc_len;
        }
        SERVER_END_REQ;

        if (!info) status = STATUS_BUFFER_TOO_SMALL;
        else if (status == STATUS_SUCCESS)
        {
            info->Description.Length = info->Description.MaximumLength = desc_len;
            info->Description.Buffer = ptr;
        }

        if (ret_len && (status == STATUS_SUCCESS || status == STATUS_BUFFER_TOO_SMALL))
            *ret_len = sizeof(*info) + desc_len;
        return status;
    }

    case ThreadWow64Context:
        return get_thread_wow64_context( handle, data, length );

    case ThreadHideFromDebugger:
        if (length != sizeof(BOOLEAN)) return STATUS_INFO_LENGTH_MISMATCH;
        if (!data) return STATUS_ACCESS_VIOLATION;
        SERVER_START_REQ( get_thread_info )
        {
            req->handle = wine_server_obj_handle( handle );
            req->access = THREAD_QUERY_INFORMATION;
            if ((status = wine_server_call( req ))) return status;
            *(BOOLEAN*)data = reply->dbg_hidden;
        }
        SERVER_END_REQ;
        if (ret_len) *ret_len = sizeof(BOOLEAN);
        return STATUS_SUCCESS;

    case ThreadEnableAlignmentFaultFixup:
        return STATUS_INVALID_INFO_CLASS;

    case ThreadPriority:
    case ThreadBasePriority:
    case ThreadImpersonationToken:
    case ThreadEventPair_Reusable:
    case ThreadZeroTlsCell:
    case ThreadPerformanceCount:
    case ThreadIdealProcessor:
    case ThreadPriorityBoost:
    case ThreadSetTlsArrayAddress:
    default:
        FIXME( "info class %d not supported yet\n", class );
        return STATUS_NOT_IMPLEMENTED;
    }
}


/******************************************************************************
 *              NtSetInformationThread  (NTDLL.@)
 */
NTSTATUS WINAPI NtSetInformationThread( HANDLE handle, THREADINFOCLASS class,
                                        const void *data, ULONG length )
{
    NTSTATUS status;

    TRACE("(%p,%d,%p,%x)\n", handle, class, data, length);

    switch (class)
    {
    case ThreadZeroTlsCell:
        if (handle == GetCurrentThread())
        {
            if (length != sizeof(DWORD)) return STATUS_INVALID_PARAMETER;
            return virtual_clear_tls_index( *(const ULONG *)data );
        }
        FIXME( "ZeroTlsCell not supported on other threads\n" );
        return STATUS_NOT_IMPLEMENTED;

    case ThreadImpersonationToken:
    {
        const HANDLE *token = data;

        if (length != sizeof(HANDLE)) return STATUS_INVALID_PARAMETER;
        TRACE("Setting ThreadImpersonationToken handle to %p\n", *token );
        SERVER_START_REQ( set_thread_info )
        {
            req->handle   = wine_server_obj_handle( handle );
            req->token    = wine_server_obj_handle( *token );
            req->mask     = SET_THREAD_INFO_TOKEN;
            status = wine_server_call( req );
        }
        SERVER_END_REQ;
        return status;
    }

    case ThreadBasePriority:
    {
        const DWORD *pprio = data;
        if (length != sizeof(DWORD)) return STATUS_INVALID_PARAMETER;
        SERVER_START_REQ( set_thread_info )
        {
            req->handle   = wine_server_obj_handle( handle );
            req->priority = *pprio;
            req->mask     = SET_THREAD_INFO_PRIORITY;
            status = wine_server_call( req );
        }
        SERVER_END_REQ;
        return status;
    }

    case ThreadAffinityMask:
    {
        const ULONG_PTR affinity_mask = get_system_affinity_mask();
        ULONG_PTR req_aff;

        if (length != sizeof(ULONG_PTR)) return STATUS_INVALID_PARAMETER;
        req_aff = *(const ULONG_PTR *)data & affinity_mask;
        if (!req_aff) return STATUS_INVALID_PARAMETER;

        SERVER_START_REQ( set_thread_info )
        {
            req->handle   = wine_server_obj_handle( handle );
            req->affinity = req_aff;
            req->mask     = SET_THREAD_INFO_AFFINITY;
            status = wine_server_call( req );
        }
        SERVER_END_REQ;
        return status;
    }

    case ThreadHideFromDebugger:
        if (length) return STATUS_INFO_LENGTH_MISMATCH;
        SERVER_START_REQ( set_thread_info )
        {
            req->handle = wine_server_obj_handle( handle );
            req->mask   = SET_THREAD_INFO_DBG_HIDDEN;
            status = wine_server_call( req );
        }
        SERVER_END_REQ;
        return status;

    case ThreadQuerySetWin32StartAddress:
    {
        const PRTL_THREAD_START_ROUTINE *entry = data;
        if (length != sizeof(PRTL_THREAD_START_ROUTINE)) return STATUS_INVALID_PARAMETER;
        SERVER_START_REQ( set_thread_info )
        {
            req->handle   = wine_server_obj_handle( handle );
            req->mask     = SET_THREAD_INFO_ENTRYPOINT;
            req->entry_point = wine_server_client_ptr( *entry );
            status = wine_server_call( req );
        }
        SERVER_END_REQ;
        return status;
    }

    case ThreadGroupInformation:
    {
        const ULONG_PTR affinity_mask = get_system_affinity_mask();
        const GROUP_AFFINITY *req_aff;

        if (length != sizeof(*req_aff)) return STATUS_INVALID_PARAMETER;
        if (!data) return STATUS_ACCESS_VIOLATION;
        req_aff = data;

        /* On Windows the request fails if the reserved fields are set */
        if (req_aff->Reserved[0] || req_aff->Reserved[1] || req_aff->Reserved[2])
            return STATUS_INVALID_PARAMETER;

        /* Wine only supports max 64 processors */
        if (req_aff->Group) return STATUS_INVALID_PARAMETER;
        if (req_aff->Mask & ~affinity_mask) return STATUS_INVALID_PARAMETER;
        if (!req_aff->Mask) return STATUS_INVALID_PARAMETER;
        SERVER_START_REQ( set_thread_info )
        {
            req->handle   = wine_server_obj_handle( handle );
            req->affinity = req_aff->Mask;
            req->mask     = SET_THREAD_INFO_AFFINITY;
            status = wine_server_call( req );
        }
        SERVER_END_REQ;
        return status;
    }

    case ThreadDescription:
    {
        const THREAD_DESCRIPTION_INFORMATION *info = data;

        if (length != sizeof(*info)) return STATUS_INFO_LENGTH_MISMATCH;
        if (!info) return STATUS_ACCESS_VIOLATION;
        if (info->Description.Length != info->Description.MaximumLength) return STATUS_INVALID_PARAMETER;
        if (info->Description.Length && !info->Description.Buffer) return STATUS_ACCESS_VIOLATION;

        SERVER_START_REQ( set_thread_info )
        {
            req->handle = wine_server_obj_handle( handle );
            req->mask   = SET_THREAD_INFO_DESCRIPTION;
            wine_server_add_data( req, info->Description.Buffer, info->Description.Length );
            status = wine_server_call( req );
        }
        SERVER_END_REQ;
        return status;
    }

    case ThreadWow64Context:
        return set_thread_wow64_context( handle, data, length );

    case ThreadEnableAlignmentFaultFixup:
        if (length != sizeof(BOOLEAN)) return STATUS_INFO_LENGTH_MISMATCH;
        if (!data) return STATUS_ACCESS_VIOLATION;
        FIXME( "ThreadEnableAlignmentFaultFixup stub!\n" );
        return STATUS_SUCCESS;

    case ThreadBasicInformation:
    case ThreadTimes:
    case ThreadPriority:
    case ThreadDescriptorTableEntry:
    case ThreadEventPair_Reusable:
    case ThreadPerformanceCount:
    case ThreadAmILastThread:
    case ThreadIdealProcessor:
    case ThreadPriorityBoost:
    case ThreadSetTlsArrayAddress:
    case ThreadIsIoPending:
    default:
        FIXME( "info class %d not supported yet\n", class );
        return STATUS_NOT_IMPLEMENTED;
    }
}


/******************************************************************************
 *              NtGetCurrentProcessorNumber  (NTDLL.@)
 */
ULONG WINAPI NtGetCurrentProcessorNumber(void)
{
    ULONG processor;

#if defined(__linux__) && defined(__NR_getcpu)
    int res = syscall(__NR_getcpu, &processor, NULL, NULL);
    if (res != -1) return processor;
#endif

    if (NtCurrentTeb()->Peb->NumberOfProcessors > 1)
    {
        ULONG_PTR thread_mask, processor_mask;

        if (!NtQueryInformationThread( GetCurrentThread(), ThreadAffinityMask,
                                       &thread_mask, sizeof(thread_mask), NULL ))
        {
            for (processor = 0; processor < NtCurrentTeb()->Peb->NumberOfProcessors; processor++)
            {
                processor_mask = (1 << processor);
                if (thread_mask & processor_mask)
                {
                    if (thread_mask != processor_mask)
                        FIXME( "need multicore support (%d processors)\n",
                               NtCurrentTeb()->Peb->NumberOfProcessors );
                    return processor;
                }
            }
        }
    }
    /* fallback to the first processor */
    return 0;
}


/******************************************************************************
 *              NtGetNextThread  (NTDLL.@)
 */
NTSTATUS WINAPI NtGetNextThread( HANDLE process, HANDLE thread, ACCESS_MASK access, ULONG attributes,
                                 ULONG flags, HANDLE *handle )
{
    HANDLE ret_handle = 0;
    NTSTATUS ret;

    TRACE( "process %p, thread %p, access %#x, attributes %#x, flags %#x, handle %p.\n",
            process, thread, access, attributes, flags, handle );

    SERVER_START_REQ( get_next_thread )
    {
        req->process = wine_server_obj_handle( process );
        req->last = wine_server_obj_handle( thread );
        req->access = access;
        req->attributes = attributes;
        req->flags = flags;
        if (!(ret = wine_server_call( req ))) ret_handle = wine_server_ptr_handle( reply->handle );
    }
    SERVER_END_REQ;

    *handle = ret_handle;
    return ret;
}