mirror of
https://github.com/reactos/reactos.git
synced 2024-11-09 16:20:37 +00:00
80 lines
2.4 KiB
C
80 lines
2.4 KiB
C
/*
|
|
* COPYRIGHT: See COPYING in the top level directory
|
|
* PROJECT: ReactOS system libraries
|
|
* PURPOSE: Rtl user thread functions
|
|
* FILE: lib/rtl/thread.c
|
|
* PROGRAMERS:
|
|
* Alex Ionescu (alex@relsoft.net)
|
|
* Eric Kohl
|
|
* KJK::Hyperion
|
|
*/
|
|
|
|
/* INCLUDES *****************************************************************/
|
|
|
|
#include <rtl.h>
|
|
#include "i386/ketypes.h"
|
|
|
|
#define NDEBUG
|
|
#include <debug.h>
|
|
|
|
/* PRIVATE FUNCTIONS *******************************************************/
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
VOID
|
|
NTAPI
|
|
RtlInitializeContext(IN HANDLE ProcessHandle,
|
|
OUT PCONTEXT ThreadContext,
|
|
IN PVOID ThreadStartParam OPTIONAL,
|
|
IN PTHREAD_START_ROUTINE ThreadStartAddress,
|
|
IN PINITIAL_TEB InitialTeb)
|
|
{
|
|
DPRINT("RtlInitializeContext: (hProcess: %p, ThreadContext: %p, Teb: %p\n",
|
|
ProcessHandle, ThreadContext, InitialTeb);
|
|
|
|
/*
|
|
* Set the Initial Registers
|
|
* This is based on NT's default values -- crazy apps might expect this...
|
|
*/
|
|
ThreadContext->Ebp = 0;
|
|
ThreadContext->Eax = 0;
|
|
ThreadContext->Ebx = 1;
|
|
ThreadContext->Ecx = 2;
|
|
ThreadContext->Edx = 3;
|
|
ThreadContext->Esi = 4;
|
|
ThreadContext->Edi = 5;
|
|
|
|
/* Set the Selectors */
|
|
ThreadContext->SegGs = 0;
|
|
ThreadContext->SegFs = KGDT_R3_TEB;
|
|
ThreadContext->SegEs = KGDT_R3_DATA;
|
|
ThreadContext->SegDs = KGDT_R3_DATA;
|
|
ThreadContext->SegSs = KGDT_R3_DATA;
|
|
ThreadContext->SegCs = KGDT_R3_CODE;
|
|
|
|
/* Enable Interrupts */
|
|
ThreadContext->EFlags = EFLAGS_INTERRUPT_MASK;
|
|
|
|
/* Settings passed */
|
|
ThreadContext->Eip = (ULONG)ThreadStartAddress;
|
|
ThreadContext->Esp = (ULONG)InitialTeb;
|
|
|
|
/* Only the basic Context is initialized */
|
|
ThreadContext->ContextFlags = CONTEXT_CONTROL |
|
|
CONTEXT_INTEGER |
|
|
CONTEXT_SEGMENTS;
|
|
|
|
/* Set up ESP to the right value */
|
|
ThreadContext->Esp -= sizeof(PVOID);
|
|
ZwWriteVirtualMemory(ProcessHandle,
|
|
(PVOID)ThreadContext->Esp,
|
|
(PVOID)&ThreadStartParam,
|
|
sizeof(PVOID),
|
|
NULL);
|
|
|
|
/* Push it down one more notch for RETEIP */
|
|
ThreadContext->Esp -= sizeof(PVOID);
|
|
}
|
|
|
|
/* EOF */
|