The previous version (like the x86 one) used a combination of C and asm code, called from C code to switch the stack. This is problematic, since there is no guarantee what assumptions C code makes about the stack (i.e. it can place any kind of stack pointers into registers or on the stack itself.) The new algorithm returns back to the systemcall entry point in asm, which then calls KiConvertToGuiThread, which is also asm and calls KeSwitchKernelStack ...
To be 100% correct and not rely on assumptions, stack switching can only be done when all previous code - starting with the syscall entry point - is pure asm code, since we can't rely on the C compiler to not use stack addresses in a way that is not transparent. Therefore the new code uses the same mechanism as for normal system calls, returning the address of the asm function KiConvertToGuiThread, which is then called like an Nt* function would be called normally. KiConvertToGuiThread then allocated a new stack, switches to it (which is now fine, since all the code is asm), frees the old stack, calls PsConvertToGuiThread (which now will not try to allocate another stack, since we already have one) and then jumps into the middle of KiSystemCallEntry64, where the system call is handled again.
Also simplify KiSystemCallEntry64 a bit by copying the first parameters into the trap frame, avoiding to allocate additional stack space for the call to KiSystemCallHandler, which now overlaps with the space that is allocated for the Nt* function.
Finally fix the locations where r10 and r11 are stored, which is TrapFrame->Rcx and TrapFrame->EFlags, based on the situation in user mode.
* [COMPILER_APITEST] Import MS EH/SEH tests
Taken from https://github.com/microsoft/compiler-tests
* [CRT] Add missing declaration of _longjmpex
* [COMPILER_APITEST] Add cmake build files for MS SEH test
It is built as a static library
* [COMPILER_APITEST] Fix GCC build of MS SEH tests
There are a number of hacks in there now. Also the volatile hacks should be separated and sent upstream.
* [COMPILER_APITEST] Fix x64 build of MS SEH tests
* [COMPILER_APITEST] Fix clang build of MS SEH tests
* [COMPILER_APITEST] Include MS SEH tests
Addendum to commit 0a392b18.
The actual problem that existed all along was that the buffers being
validated with CsrValidateMessageBuffer() were not the correct ones!
What had to be checked is the string buffer **INSIDE** the UNICODE_STRING
structures! Indeed, it is these buffers that we are allocating on client side,
see https://github.com/reactos/reactos/blob/9b421af1/dll/win32/kernel32/client/dosdev.c#L324-L336
Dedicated to Pierre Schweitzer.
rapps.com will be launched when running 'rapps' from cmd or
from run, and since it is a console application, explorer/ cmd will
wait for it.
This rapps.com passes the commandline to rapps.exe,
and wait for rapps.exe to exit before closing.
CORE-17281
This avoids blocking all Ex worker threads in fastfat, thereby making Cc
unable to issue the lazy writes that would unblock those workers.
This is more or less directly taken from fastfat_new.
Instead of messing around with a file in the source tree and risk commiting it
use cmake -DUNATTENDED_BOOTCD=yes to enable it, and use the UNATTENDED_BOOTCD_* cache variables to configure
