reactos/lib/rtl/i386/thread.c
Amine Khaldi 527f2f9057 [SHELL/EXPERIMENTS]
* Create a branch for some evul shell experiments.

svn path=/branches/shell-experiments/; revision=61927
2014-02-02 19:37:27 +00:00

81 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 */