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ntdll: Don't pass arguments on the stack for user callbacks on ARM64.

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This commit is contained in:
Alexandre Julliard 2023-06-01 11:26:22 +02:00
parent 6b0836e3f1
commit efa99eab0b
1 changed files with 18 additions and 27 deletions
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45
dlls/ntdll/unix/signal_arm64.c
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@ -1092,14 +1092,11 @@ NTSTATUS call_user_exception_dispatcher( EXCEPTION_RECORD *rec, CONTEXT *context
/***********************************************************************
* call_user_mode_callback
*/
extern NTSTATUS CDECL call_user_mode_callback( void *func, void *stack, void **ret_ptr,
ULONG *ret_len, TEB *teb ) DECLSPEC_HIDDEN;
extern NTSTATUS call_user_mode_callback( ULONG id, void *args, ULONG len, void **ret_ptr,
ULONG *ret_len, void *func, TEB *teb ) DECLSPEC_HIDDEN;
__ASM_GLOBAL_FUNC( call_user_mode_callback,
"stp x29, x30, [sp,#-0xc0]!\n\t"
"mov x29, sp\n\t"
"mov x16, x0\n\t" /* func */
"mov x17, x1\n\t" /* stack */
"mov x18, x4\n\t" /* teb */
"stp x19, x20, [x29, #0x10]\n\t"
"stp x21, x22, [x29, #0x20]\n\t"
"stp x23, x24, [x29, #0x30]\n\t"
@ -1109,29 +1106,28 @@ __ASM_GLOBAL_FUNC( call_user_mode_callback,
"stp d10, d11, [x29, #0x70]\n\t"
"stp d12, d13, [x29, #0x80]\n\t"
"stp d14, d15, [x29, #0x90]\n\t"
"stp x2, x3, [x29, #0xa0]\n\t" /* ret_ptr, ret_len */
"mrs x5, fpcr\n\t"
"mrs x6, fpsr\n\t"
"bfi x5, x6, #0, #32\n\t"
"ldr x6, [x18]\n\t" /* teb->Tib.ExceptionList */
"stp x5, x6, [x29, #0xb0]\n\t"
"stp x3, x4, [x29, #0xa0]\n\t" /* ret_ptr, ret_len */
"mov x18, x6\n\t" /* teb */
"mrs x3, fpcr\n\t"
"mrs x4, fpsr\n\t"
"bfi x3, x4, #0, #32\n\t"
"ldr x4, [x18]\n\t" /* teb->Tib.ExceptionList */
"stp x3, x4, [x29, #0xb0]\n\t"
"ldr x7, [x18, #0x2f8]\n\t" /* arm64_thread_data()->syscall_frame */
"sub x5, sp, #0x330\n\t" /* sizeof(struct syscall_frame) */
"str x5, [x18, #0x2f8]\n\t" /* arm64_thread_data()->syscall_frame */
"sub x3, sp, #0x330\n\t" /* sizeof(struct syscall_frame) */
"str x3, [x18, #0x2f8]\n\t" /* arm64_thread_data()->syscall_frame */
"ldr x8, [x7, #0x118]\n\t" /* prev_frame->syscall_table */
"ldp x0, x1, [x17]\n\t" /* id, args */
"ldr x2, [x17, #0x10]\n\t" /* len */
"mov sp, x17\n\t"
"stp x7, x8, [x5, #0x110]\n\t" /* frame->prev_frame, frame->syscall_table */
"br x16" )
"mov sp, x1\n\t" /* stack */
"stp x7, x8, [x3, #0x110]\n\t" /* frame->prev_frame, frame->syscall_table */
"br x5" )
/***********************************************************************
* user_mode_callback_return
*/
extern void CDECL DECLSPEC_NORETURN user_mode_callback_return( void *ret_ptr, ULONG ret_len,
NTSTATUS status, TEB *teb ) DECLSPEC_HIDDEN;
extern void DECLSPEC_NORETURN user_mode_callback_return( void *ret_ptr, ULONG ret_len,
NTSTATUS status, TEB *teb ) DECLSPEC_HIDDEN;
__ASM_GLOBAL_FUNC( user_mode_callback_return,
"ldr x4, [x3, #0x2f8]\n\t" /* arm64_thread_data()->syscall_frame */
"ldr x5, [x4, #0x110]\n\t" /* prev_frame */
@ -1167,18 +1163,13 @@ NTSTATUS WINAPI KeUserModeCallback( ULONG id, const void *args, ULONG len, void
{
struct syscall_frame *frame = arm64_thread_data()->syscall_frame;
void *args_data = (void *)((frame->sp - len) & ~15);
ULONG_PTR *stack = args_data;
if ((char *)ntdll_get_thread_data()->kernel_stack + min_kernel_stack > (char *)&frame)
return STATUS_STACK_OVERFLOW;
memcpy( args_data, args, len );
*(--stack) = 0;
*(--stack) = len;
*(--stack) = (ULONG_PTR)args_data;
*(--stack) = id;
return call_user_mode_callback( pKiUserCallbackDispatcher, stack, ret_ptr, ret_len, NtCurrentTeb() );
return call_user_mode_callback( id, args_data, len, ret_ptr, ret_len,
pKiUserCallbackDispatcher, NtCurrentTeb() );
}