Alexandre Julliard : ntdll: Reimplement thread initialization in assembler on ARM.
Alexandre Julliard
julliard at winehq.org
Thu Dec 14 15:31:53 CST 2017
Module: wine
Branch: master
Commit: f492efdb3c77f015247f6b73d98110a0353035b3
URL: http://source.winehq.org/git/wine.git/?a=commit;h=f492efdb3c77f015247f6b73d98110a0353035b3
Author: Alexandre Julliard <julliard at winehq.org>
Date: Thu Dec 14 18:34:46 2017 +0100
ntdll: Reimplement thread initialization in assembler on ARM.
Signed-off-by: Alexandre Julliard <julliard at winehq.org>
---
dlls/ntdll/signal_arm.c | 60 ++++++++++++++++++++++---------------------------
1 file changed, 27 insertions(+), 33 deletions(-)
diff --git a/dlls/ntdll/signal_arm.c b/dlls/ntdll/signal_arm.c
index fc65c87..23f494d 100644
--- a/dlls/ntdll/signal_arm.c
+++ b/dlls/ntdll/signal_arm.c
@@ -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() );
}
/***********************************************************************
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