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ntdll: Reimplement KeUserModeCallback in assembly on i386.
This commit is contained in:
Alexandre Julliard
parent
1a652d2c9e
commit
d40017ecda
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@ -1571,59 +1571,107 @@ NTSTATUS call_user_exception_dispatcher( EXCEPTION_RECORD *rec, CONTEXT *context
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}
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struct user_callback_frame
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{
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struct syscall_frame frame;
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void **ret_ptr;
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ULONG *ret_len;
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__wine_jmp_buf jmpbuf;
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NTSTATUS status;
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void *teb_frame;
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};
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/***********************************************************************
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* call_user_mode_callback
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*/
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extern NTSTATUS CDECL call_user_mode_callback( void *func, void *stack, void **ret_ptr,
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ULONG *ret_len, TEB *teb );
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__ASM_GLOBAL_FUNC( call_user_mode_callback,
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"pushl %ebp\n\t"
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__ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
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__ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
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"movl %esp,%ebp\n\t"
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__ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
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"pushl %ebx\n\t"
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__ASM_CFI(".cfi_rel_offset %ebx,-4\n\t")
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"pushl %esi\n\t"
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__ASM_CFI(".cfi_rel_offset %esi,-8\n\t")
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"pushl %edi\n\t"
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__ASM_CFI(".cfi_rel_offset %edi,-12\n\t")
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"movl 0x18(%ebp),%edx\n\t" /* teb */
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"pushl 0(%edx)\n\t" /* teb->Tib.ExceptionList */
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"subl $0x384,%esp\n\t" /* sizeof(struct syscall_frame) + ebp */
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"andl $~63,%esp\n\t"
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"movl %ebp,0x380(%esp)\n\t"
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"movl 0x1f8(%edx),%ecx\n\t" /* x86_thread_data()->syscall_frame */
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"movl (%ecx),%eax\n\t" /* frame->syscall_flags */
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"movl %eax,(%esp)\n\t"
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"movl 0x38(%ecx),%eax\n\t" /* frame->syscall_table */
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"movl %eax,0x38(%esp)\n\t"
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"movl %ecx,0x3c(%esp)\n\t" /* frame->prev_frame */
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"movl %esp,0x1f8(%edx)\n\t" /* x86_thread_data()->syscall_frame */
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"movl 8(%ebp),%ecx\n\t" /* func */
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"movl 12(%ebp),%esp\n\t" /* stack */
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"xorl %ebp,%ebp\n\t"
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"jmpl *%ecx" )
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/***********************************************************************
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* user_mode_callback_return
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*/
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extern void CDECL DECLSPEC_NORETURN user_mode_callback_return( void *ret_ptr, ULONG ret_len,
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NTSTATUS status, TEB *teb );
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__ASM_GLOBAL_FUNC( user_mode_callback_return,
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"movl 16(%esp),%edx\n" /* teb */
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"movl 0x1f8(%edx),%eax\n\t" /* x86_thread_data()->syscall_frame */
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"movl 0x3c(%eax),%ecx\n\t" /* frame->prev_frame */
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"movl %ecx,0x1f8(%edx)\n\t" /* x86_thread_data()->syscall_frame */
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"movl 0x380(%eax),%ebp\n\t" /* call_user_mode_callback ebp */
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__ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
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__ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
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__ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
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__ASM_CFI(".cfi_rel_offset %ebx,-4\n\t")
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__ASM_CFI(".cfi_rel_offset %esi,-8\n\t")
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__ASM_CFI(".cfi_rel_offset %edi,-12\n\t")
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"movl 4(%esp),%esi\n\t" /* ret_ptr */
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"movl 8(%esp),%edi\n\t" /* ret_len */
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"movl 12(%esp),%eax\n\t" /* status */
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"leal -16(%ebp),%esp\n\t"
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"movl 0x10(%ebp),%ecx\n\t" /* ret_ptr */
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"movl %esi,(%ecx)\n\t"
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"movl 0x14(%ebp),%ecx\n\t" /* ret_len */
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"movl %edi,(%ecx)\n\t"
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"popl 0(%edx)\n\t" /* teb->Tib.ExceptionList */
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"popl %edi\n\t"
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__ASM_CFI(".cfi_same_value %edi\n\t")
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"popl %esi\n\t"
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__ASM_CFI(".cfi_same_value %esi\n\t")
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"popl %ebx\n\t"
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__ASM_CFI(".cfi_same_value %ebx\n\t")
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"leave\n"
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__ASM_CFI(".cfi_def_cfa %esp,4\n\t")
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__ASM_CFI(".cfi_same_value %ebp\n\t")
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"ret" )
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/***********************************************************************
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* KeUserModeCallback
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*/
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NTSTATUS WINAPI KeUserModeCallback( ULONG id, const void *args, ULONG len, void **ret_ptr, ULONG *ret_len )
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{
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struct user_callback_frame callback_frame = { { 0 }, ret_ptr, ret_len };
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struct syscall_frame *frame = x86_thread_data()->syscall_frame;
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void *args_data = (void *)((frame->esp - len) & ~15);
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ULONG_PTR *stack = args_data;
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/* if we have no syscall frame, call the callback directly */
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if ((char *)&callback_frame < (char *)ntdll_get_thread_data()->kernel_stack ||
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(char *)&callback_frame > (char *)x86_thread_data()->syscall_frame)
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if ((char *)&frame < (char *)ntdll_get_thread_data()->kernel_stack ||
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(char *)&frame > (char *)x86_thread_data()->syscall_frame)
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{
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NTSTATUS (WINAPI *func)(const void *, ULONG) = ((void **)NtCurrentTeb()->Peb->KernelCallbackTable)[id];
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return func( args, len );
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}
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if ((char *)ntdll_get_thread_data()->kernel_stack + min_kernel_stack > (char *)&callback_frame)
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if ((char *)ntdll_get_thread_data()->kernel_stack + min_kernel_stack > (char *)&frame)
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return STATUS_STACK_OVERFLOW;
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if (!__wine_setjmpex( &callback_frame.jmpbuf, NULL ))
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{
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struct syscall_frame *frame = x86_thread_data()->syscall_frame;
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void *args_data = (void *)((frame->esp - len) & ~15);
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ULONG_PTR *stack = args_data;
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memcpy( args_data, args, len );
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*(--stack) = 0;
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*(--stack) = len;
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*(--stack) = (ULONG_PTR)args_data;
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*(--stack) = id;
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*(--stack) = 0xdeadbabe;
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memcpy( args_data, args, len );
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*(--stack) = 0;
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*(--stack) = len;
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*(--stack) = (ULONG_PTR)args_data;
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*(--stack) = id;
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*(--stack) = 0xdeadbabe;
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callback_frame.frame.esp = (ULONG_PTR)stack;
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callback_frame.frame.eip = (ULONG_PTR)pKiUserCallbackDispatcher;
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callback_frame.frame.eflags = 0x202;
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callback_frame.frame.syscall_flags = frame->syscall_flags;
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callback_frame.frame.syscall_table = frame->syscall_table;
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callback_frame.frame.prev_frame = frame;
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callback_frame.teb_frame = NtCurrentTeb()->Tib.ExceptionList;
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x86_thread_data()->syscall_frame = &callback_frame.frame;
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__wine_syscall_dispatcher_return( &callback_frame.frame, 0 );
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}
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return callback_frame.status;
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return call_user_mode_callback( pKiUserCallbackDispatcher, stack, ret_ptr, ret_len, NtCurrentTeb() );
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}
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@ -1632,16 +1680,8 @@ NTSTATUS WINAPI KeUserModeCallback( ULONG id, const void *args, ULONG len, void
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*/
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NTSTATUS WINAPI NtCallbackReturn( void *ret_ptr, ULONG ret_len, NTSTATUS status )
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{
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struct user_callback_frame *frame = (struct user_callback_frame *)x86_thread_data()->syscall_frame;
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if (!frame->frame.prev_frame) return STATUS_NO_CALLBACK_ACTIVE;
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*frame->ret_ptr = ret_ptr;
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*frame->ret_len = ret_len;
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frame->status = status;
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x86_thread_data()->syscall_frame = frame->frame.prev_frame;
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NtCurrentTeb()->Tib.ExceptionList = frame->teb_frame;
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__wine_longjmp( &frame->jmpbuf, 1 );
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if (!x86_thread_data()->syscall_frame->prev_frame) return STATUS_NO_CALLBACK_ACTIVE;
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user_mode_callback_return( ret_ptr, ret_len, status, NtCurrentTeb() );
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}
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