获取线程信息/环境块（TIB / TEB）的官方方式

Question

In Windows, it's long been common, if undocumented, knowledge that the Thread Information Block (TIB) of the current thread can be found at FS:0. But that only works on Intel CPUs, where the FS register exists in the first place. Now I wanna get to the TIB on an ARM-based Windows system (Windows Phone and maybe Windows RT). Is there an API for that, please?

EDIT: I want to get the thread stack base for crash reporting purposes.

Information about TIB/TEB: http://www.microsoft.com/msj/archive/S2CE.aspx

Answer 1

The macro NtCurrentTeb() is available in winnt.h for all supported architectures, including ARM (Windows RT):

#if defined(_M_ARM) && !defined(__midl) && !defined(_M_CEE_PURE)

__forceinline
struct _TEB *
NtCurrentTeb (
    VOID
    )
{
    return (struct _TEB *)(ULONG_PTR)_MoveFromCoprocessor(CP15_TPIDRURW);
}

Answer 2

要回答您发布的问题，您可以使用NtQueryInformationThread()来检索THREAD_BASIC_INFORMATION结构，该结构包含指向其TebBaseAddress成员中线程的TIB的指针。

Answer 3

Igor nailed it. But FYI, in ARM assembly it goes like this:

mrc p15, 0, r12, c13, c0, 2 ; r12 now points at TEB/TIB
ldr r12, [r12, #4] ; r12 now holds stack base