1 /* 2 * COPYRIGHT: See COPYING in the top level directory 3 * PROJECT: ReactOS system libraries 4 * PURPOSE: Rtl user thread functions 5 * FILE: lib/rtl/i386/thread.c 6 * PROGRAMERS: 7 * Alex Ionescu (alex@relsoft.net) 8 * Eric Kohl 9 * KJK::Hyperion 10 */ 11 12 /* INCLUDES *****************************************************************/ 13 14 #include <rtl.h> 15 #include "i386/ketypes.h" 16 17 #define NDEBUG 18 #include <debug.h> 19 20 /* PRIVATE FUNCTIONS *******************************************************/ 21 22 /* 23 * @implemented 24 */ 25 VOID 26 NTAPI 27 RtlInitializeContext(IN HANDLE ProcessHandle, 28 OUT PCONTEXT ThreadContext, 29 IN PVOID ThreadStartParam OPTIONAL, 30 IN PTHREAD_START_ROUTINE ThreadStartAddress, 31 IN PINITIAL_TEB InitialTeb) 32 { 33 DPRINT("RtlInitializeContext: (hProcess: %p, ThreadContext: %p, Teb: %p\n", 34 ProcessHandle, ThreadContext, InitialTeb); 35 36 /* 37 * Set the Initial Registers 38 * This is based on NT's default values -- crazy apps might expect this... 39 */ 40 ThreadContext->Ebp = 0; 41 ThreadContext->Eax = 0; 42 ThreadContext->Ebx = 1; 43 ThreadContext->Ecx = 2; 44 ThreadContext->Edx = 3; 45 ThreadContext->Esi = 4; 46 ThreadContext->Edi = 5; 47 48 /* Set the Selectors */ 49 ThreadContext->SegGs = 0; 50 ThreadContext->SegFs = KGDT_R3_TEB; 51 ThreadContext->SegEs = KGDT_R3_DATA; 52 ThreadContext->SegDs = KGDT_R3_DATA; 53 ThreadContext->SegSs = KGDT_R3_DATA; 54 ThreadContext->SegCs = KGDT_R3_CODE; 55 56 /* Enable Interrupts */ 57 ThreadContext->EFlags = EFLAGS_INTERRUPT_MASK; 58 59 /* Settings passed */ 60 ThreadContext->Eip = (ULONG)ThreadStartAddress; 61 ThreadContext->Esp = (ULONG)InitialTeb; 62 63 /* Only the basic Context is initialized */ 64 ThreadContext->ContextFlags = CONTEXT_CONTROL | 65 CONTEXT_INTEGER | 66 CONTEXT_SEGMENTS; 67 68 /* Set up ESP to the right value */ 69 ThreadContext->Esp -= sizeof(PVOID); 70 ZwWriteVirtualMemory(ProcessHandle, 71 (PVOID)ThreadContext->Esp, 72 (PVOID)&ThreadStartParam, 73 sizeof(PVOID), 74 NULL); 75 76 /* Push it down one more notch for RETEIP */ 77 ThreadContext->Esp -= sizeof(PVOID); 78 } 79 80 NTSTATUS 81 NTAPI 82 RtlQueueApcWow64Thread( 83 _In_ HANDLE ThreadHandle, 84 _In_ PKNORMAL_ROUTINE ApcRoutine, 85 _In_opt_ PVOID NormalContext, 86 _In_opt_ PVOID SystemArgument1, 87 _In_opt_ PVOID SystemArgument2) 88 { 89 return NtQueueApcThread(ThreadHandle, 90 ApcRoutine, 91 NormalContext, 92 SystemArgument1, 93 SystemArgument2); 94 } 95 96 /* EOF */ 97