Alexandre Julliard : ntdll: Reimplement thread initialization in assembler on ARM64.
Module: wine Branch: master Commit: e91e6cc9bdb484643cb73665170a3f91ce6278ba URL: https://source.winehq.org/git/wine.git/?a=commit;h=e91e6cc9bdb484643cb736651... Author: Alexandre Julliard <julliard(a)winehq.org> Date: Tue Aug 6 10:08:41 2019 +0200 ntdll: Reimplement thread initialization in assembler on ARM64. Signed-off-by: Alexandre Julliard <julliard(a)winehq.org> --- dlls/ntdll/signal_arm64.c | 128 +++++++++++++++++++++++++++++++++++----------- 1 file changed, 98 insertions(+), 30 deletions(-) diff --git a/dlls/ntdll/signal_arm64.c b/dlls/ntdll/signal_arm64.c index d2d43b3..900fd3b 100644 --- a/dlls/ntdll/signal_arm64.c +++ b/dlls/ntdll/signal_arm64.c @@ -94,6 +94,20 @@ typedef int (*wine_signal_handler)(unsigned int sig); static wine_signal_handler handlers[256]; +struct arm64_thread_data +{ + void *exit_frame; /* exit frame pointer */ + CONTEXT *context; /* context to set with SIGUSR2 */ +}; + +C_ASSERT( sizeof(struct arm64_thread_data) <= sizeof(((TEB *)0)->SystemReserved2) ); +C_ASSERT( offsetof( TEB, SystemReserved2 ) + offsetof( struct arm64_thread_data, exit_frame ) == 0x300 ); + +static inline struct arm64_thread_data *arm64_thread_data(void) +{ + return (struct arm64_thread_data *)NtCurrentTeb()->SystemReserved2; +} + /*********************************************************************** * dispatch_signal */ @@ -1084,35 +1098,91 @@ static void WINAPI call_thread_entry_point( LPTHREAD_START_ROUTINE entry, void * abort(); /* should not be reached */ } -typedef void (WINAPI *thread_start_func)(LPTHREAD_START_ROUTINE,void *); +extern void DECLSPEC_NORETURN start_thread( LPTHREAD_START_ROUTINE entry, void *arg, BOOL suspend, + void *relay, TEB *teb ); +__ASM_GLOBAL_FUNC( start_thread, + "stp x29, x30, [sp,#-16]!\n\t" + "mov x18, x4\n\t" /* teb */ + /* store exit frame */ + "mov x29, sp\n\t" + "str x29, [x4, #0x300]\n\t" /* arm64_thread_data()->exit_frame */ + /* switch to thread stack */ + "ldr x5, [x4, #8]\n\t" /* teb->Tib.StackBase */ + "sub sp, x5, #0x1000\n\t" + /* attach dlls */ + "bl " __ASM_NAME("attach_thread") "\n\t" + "mov sp, x0\n\t" + /* clear the stack */ + "and x0, x0, #~0xfff\n\t" /* round down to page size */ + "bl " __ASM_NAME("virtual_clear_thread_stack") "\n\t" + /* switch to the initial context */ + "mov x0, sp\n\t" + "ldp x1, x2, [x0, #0x10]\n\t" /* context->X1,2 */ + "ldp x3, x4, [x0, #0x20]\n\t" /* context->X3,4 */ + "ldp x5, x6, [x0, #0x30]\n\t" /* context->X5,6 */ + "ldp x7, x8, [x0, #0x40]\n\t" /* context->X7,8 */ + "ldp x9, x10, [x0, #0x50]\n\t" /* context->X9,10 */ + "ldp x11, x12, [x0, #0x60]\n\t" /* context->X11,12 */ + "ldp x13, x14, [x0, #0x70]\n\t" /* context->X13,14 */ + "ldp x15, x16, [x0, #0x80]\n\t" /* context->X15,16 */ + "ldp x17, x18, [x0, #0x90]\n\t" /* context->X17,18 */ + "ldp x19, x20, [x0, #0xa0]\n\t" /* context->X19,20 */ + "ldp x21, x22, [x0, #0xb0]\n\t" /* context->X21,22 */ + "ldp x23, x24, [x0, #0xc0]\n\t" /* context->X23,24 */ + "ldp x25, x26, [x0, #0xd0]\n\t" /* context->X25,26 */ + "ldp x27, x28, [x0, #0xe0]\n\t" /* context->X27,28 */ + "ldp x29, x30, [x0, #0xf0]\n\t" /* context->Fp,Lr */ + "ldr x17, [x0, #0x100]\n\t" /* context->Sp */ + "mov sp, x17\n\t" + "ldr x17, [x0, #0x108]\n\t" /* context->Pc */ + "ldr x0, [x0, #0x8]\n\t" /* context->X0 */ + "br x17" ) + +extern void DECLSPEC_NORETURN call_thread_exit_func( int status, void (*func)(int), TEB *teb ); +__ASM_GLOBAL_FUNC( call_thread_exit_func, + "ldr x3, [x2, #0x300]\n\t" /* arm64_thread_data()->exit_frame */ + "str xzr, [x2, #0x300]\n\t" + "cbz x3, 1f\n\t" + "mov sp, x3\n" + "1:\tblr x1" ) -struct startup_info +/*********************************************************************** + * init_thread_context + */ +static void init_thread_context( CONTEXT *context, LPTHREAD_START_ROUTINE entry, void *arg, void *relay ) { - thread_start_func start; - LPTHREAD_START_ROUTINE entry; - void *arg; - BOOL suspend; -}; + context->u.s.X0 = (DWORD64)entry; + context->u.s.X1 = (DWORD64)arg; + context->u.s.X18 = (DWORD64)NtCurrentTeb(); + context->Sp = (DWORD64)NtCurrentTeb()->Tib.StackBase; + context->Pc = (DWORD64)relay; +} /*********************************************************************** - * thread_startup + * attach_thread */ -static void thread_startup( void *param ) +PCONTEXT DECLSPEC_HIDDEN attach_thread( LPTHREAD_START_ROUTINE entry, void *arg, + BOOL suspend, void *relay ) { - CONTEXT context = { 0 }; - struct startup_info *info = param; - - /* build the initial context */ - context.ContextFlags = CONTEXT_FULL; - context.u.s.X0 = (DWORD_PTR)info->entry; - context.u.s.X1 = (DWORD_PTR)info->arg; - context.Sp = (DWORD_PTR)NtCurrentTeb()->Tib.StackBase; - context.Pc = (DWORD_PTR)info->start; + CONTEXT *ctx; - if (info->suspend) wait_suspend( &context ); - LdrInitializeThunk( &context, (void **)&context.u.s.X0, 0, 0 ); + if (suspend) + { + CONTEXT context = { CONTEXT_ALL }; - ((thread_start_func)context.Pc)( (LPTHREAD_START_ROUTINE)context.u.s.X0, (void *)context.u.s.X1 ); + init_thread_context( &context, entry, arg, relay ); + wait_suspend( &context ); + ctx = (CONTEXT *)((ULONG_PTR)context.Sp & ~15) - 1; + *ctx = context; + } + else + { + ctx = (CONTEXT *)NtCurrentTeb()->Tib.StackBase - 1; + init_thread_context( ctx, entry, arg, relay ); + } + ctx->ContextFlags = CONTEXT_FULL; + LdrInitializeThunk( ctx, (void **)&ctx->u.s.X0, 0, 0 ); + return ctx; } /*********************************************************************** @@ -1120,13 +1190,12 @@ static void thread_startup( void *param ) * * Thread startup sequence: * signal_start_thread() - * -> thread_startup() - * -> call_thread_entry_point() + * -> start_thread() + * -> call_thread_func() */ 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() ); } /********************************************************************** @@ -1134,13 +1203,12 @@ void signal_start_thread( LPTHREAD_START_ROUTINE entry, void *arg, BOOL suspend * * Process startup sequence: * signal_start_process() - * -> thread_startup() + * -> start_thread() * -> kernel32_start_process() */ 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() ); } /*********************************************************************** @@ -1148,7 +1216,7 @@ void signal_start_process( LPTHREAD_START_ROUTINE entry, BOOL suspend ) */ void signal_exit_thread( int status ) { - exit_thread( status ); + call_thread_exit_func( status, exit_thread, NtCurrentTeb() ); } /*********************************************************************** @@ -1156,7 +1224,7 @@ void signal_exit_thread( int status ) */ void signal_exit_process( int status ) { - exit( status ); + call_thread_exit_func( status, exit, NtCurrentTeb() ); } /**********************************************************************
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Alexandre Julliard