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ntdll: Initialize the Wow64 context on x86-64. 

Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Alexandre Julliard 2021-07-01 11:46:05 +02:00
parent bedfb31d7c
commit 4acecd8619
1 changed files with 36 additions and 2 deletions
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38
dlls/ntdll/unix/signal_x86_64.c
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@ -362,6 +362,9 @@ static inline void context_init_xstate( CONTEXT *context, void *xstate_buffer )
context->ContextFlags |= CONTEXT_XSTATE;
}
static USHORT cs32_sel; /* selector for %cs in 32-bit mode */
static USHORT cs64_sel; /* selector for %cs in 64-bit mode */
static USHORT ds64_sel; /* selector for %ds/%es/%ss in 64-bit mode */
/***********************************************************************
* Definitions for Dwarf unwind tables
@ -2479,6 +2482,8 @@ NTSTATUS WINAPI NtSetLdtEntries( ULONG sel1, LDT_ENTRY entry1, ULONG sel2, LDT_E
*/
void signal_init_threading(void)
{
__asm__( "movw %%cs,%0" : "=m" (cs64_sel) );
__asm__( "movw %%ss,%0" : "=m" (ds64_sel) );
}
@ -2607,6 +2612,13 @@ void signal_init_process(void)
if (cpu_info.ProcessorFeatureBits & CPU_FEATURE_XSAVE) __wine_syscall_flags |= SYSCALL_HAVE_XSAVE;
if (xstate_compaction_enabled) __wine_syscall_flags |= SYSCALL_HAVE_XSAVEC;
#ifdef __linux__
if (NtCurrentTeb()->WowTebOffset)
{
cs32_sel = 0x23;
}
#endif
sig_act.sa_mask = server_block_set;
sig_act.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK;
@ -2642,17 +2654,39 @@ void DECLSPEC_HIDDEN call_init_thunk( LPTHREAD_START_ROUTINE entry, void *arg, B
struct amd64_thread_data *thread_data = (struct amd64_thread_data *)&teb->GdiTebBatch;
struct syscall_frame *frame = thread_data->syscall_frame;
CONTEXT *ctx, context = { 0 };
I386_CONTEXT *wow_context;
context.ContextFlags = CONTEXT_ALL;
context.Rcx = (ULONG_PTR)entry;
context.Rdx = (ULONG_PTR)arg;
context.Rsp = (ULONG_PTR)teb->Tib.StackBase - 0x28;
context.Rip = (ULONG_PTR)pRtlUserThreadStart;
context.SegCs = cs64_sel;
context.SegDs = ds64_sel;
context.SegEs = ds64_sel;
context.SegGs = ds64_sel;
context.SegSs = ds64_sel;
context.EFlags = 0x200;
context.u.FltSave.ControlWord = 0x27f;
context.u.FltSave.MxCsr = context.MxCsr = 0x1f80;
__asm__( "movw %%cs,%0" : "=m" (context.SegCs) );
__asm__( "movw %%ss,%0" : "=m" (context.SegSs) );
if ((wow_context = get_cpu_area( IMAGE_FILE_MACHINE_I386 )))
{
wow_context->ContextFlags = CONTEXT_I386_ALL;
wow_context->Eax = (ULONG_PTR)entry;
wow_context->Ebx = (ULONG_PTR)arg;
wow_context->Esp = get_wow_teb( teb )->Tib.StackBase - 16;
wow_context->Eip = (ULONG_PTR)pRtlUserThreadStart;
wow_context->SegCs = cs32_sel;
wow_context->SegDs = context.SegDs;
wow_context->SegEs = context.SegEs;
wow_context->SegFs = context.SegFs;
wow_context->SegGs = context.SegGs;
wow_context->SegSs = context.SegSs;
wow_context->EFlags = 0x202;
wow_context->FloatSave.ControlWord = context.u.FltSave.ControlWord;
*(XSAVE_FORMAT *)wow_context->ExtendedRegisters = context.u.FltSave;
}
if (suspend) wait_suspend( &context );