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ntdll: Reimplement thread initialization in assembler on ARM. 

Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Alexandre Julliard 2017-12-14 18:34:46 +01:00
parent 8a07ee48fa
commit f492efdb3c
1 changed files with 27 additions and 33 deletions
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60
dlls/ntdll/signal_arm.c
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@ -1220,35 +1220,31 @@ static void call_thread_entry_point( LPTHREAD_START_ROUTINE entry, void *arg )
abort(); /* should not be reached */
}
typedef void (WINAPI *thread_start_func)(LPTHREAD_START_ROUTINE,void *);
struct startup_info
{
thread_start_func start;
LPTHREAD_START_ROUTINE entry;
void *arg;
BOOL suspend;
};
/***********************************************************************
* thread_startup
*/
static void thread_startup( void *param )
{
CONTEXT context = { 0 };
struct startup_info *info = param;
/* build the initial context */
context.ContextFlags = CONTEXT_FULL;
context.R0 = (DWORD)info->entry;
context.R1 = (DWORD)info->arg;
context.Sp = (DWORD)NtCurrentTeb()->Tib.StackBase;
context.Pc = (DWORD)info->start;
attach_dlls( &context, info->suspend );
set_cpu_context( &context );
}
extern void DECLSPEC_NORETURN start_thread( LPTHREAD_START_ROUTINE entry, void *arg, BOOL suspend,
void *relay, TEB *teb );
__ASM_GLOBAL_FUNC( start_thread,
".arm\n\t"
"push {r4-r12,lr}\n\t"
/* build initial context on thread stack */
"ldr r4, [sp, #40]\n\t" /* teb */
"ldr r4, [r4, #4]\n\t" /* teb->Tib.StackBase */
"sub r5, r4, #0x1a0\n\t" /* sizeof(CONTEXT) */
"mov ip, #0x0200000\n\t" /* CONTEXT_ARM */
"add ip, #0x3\n\t" /* CONTEXT_FULL */
"str ip, [r5]\n\t" /* context->ContextFlags */
"str r0, [r5, #0x4]\n\t" /* context->R0 = entry */
"str r1, [r5, #0x8]\n\t" /* context->R1 = arg */
"str r4, [r5, #0x38]\n\t" /* context->Sp = stack */
"str r3, [r5, #0x40]\n\t" /* context->Pc = relay */
/* switch to thread stack */
"mov sp, r5\n\t"
/* attach dlls */
"mov r0, r5\n\t" /* context */
"mov r1, r2\n\t" /* suspend */
"bl " __ASM_NAME("attach_dlls") "\n\t"
/* switch to the initial context */
"mov r0, r5\n\t"
"b " __ASM_NAME("set_cpu_context") )
/***********************************************************************
* signal_start_thread
@ -1260,8 +1256,7 @@ static void thread_startup( void *param )
*/
void signal_start_thread( LPTHREAD_START_ROUTINE entry, void *arg, BOOL suspend )
{
struct startup_info info = { call_thread_entry_point, entry, arg, suspend };
wine_switch_to_stack( thread_startup, &info, NtCurrentTeb()->Tib.StackBase );
start_thread( entry, arg, suspend, call_thread_entry_point, NtCurrentTeb() );
}
/**********************************************************************
@ -1274,8 +1269,7 @@ void signal_start_thread( LPTHREAD_START_ROUTINE entry, void *arg, BOOL suspend
*/
void signal_start_process( LPTHREAD_START_ROUTINE entry, BOOL suspend )
{
struct startup_info info = { kernel32_start_process, entry, NtCurrentTeb()->Peb, suspend };
wine_switch_to_stack( thread_startup, &info, NtCurrentTeb()->Tib.StackBase );
start_thread( entry, NtCurrentTeb()->Peb, suspend, kernel32_start_process, NtCurrentTeb() );
}
/***********************************************************************