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Alexey Alyaev
wine
Commits
d40017ec
Commit
d40017ec
authored
2 years ago
by
Alexandre Julliard
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ntdll: Reimplement KeUserModeCallback in assembly on i386.
parent
1a652d2c
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1 changed file
dlls/ntdll/unix/signal_i386.c
+88
-48
88 additions, 48 deletions
dlls/ntdll/unix/signal_i386.c
with
88 additions
and
48 deletions
dlls/ntdll/unix/signal_i386.c
+
88
−
48
View file @
d40017ec
...
...
@@ -1571,59 +1571,107 @@ NTSTATUS call_user_exception_dispatcher( EXCEPTION_RECORD *rec, CONTEXT *context
}
struct
user_callback_frame
{
struct
syscall_frame
frame
;
void
**
ret_ptr
;
ULONG
*
ret_len
;
__wine_jmp_buf
jmpbuf
;
NTSTATUS
status
;
void
*
teb_frame
;
};
/***********************************************************************
* call_user_mode_callback
*/
extern
NTSTATUS
CDECL
call_user_mode_callback
(
void
*
func
,
void
*
stack
,
void
**
ret_ptr
,
ULONG
*
ret_len
,
TEB
*
teb
);
__ASM_GLOBAL_FUNC
(
call_user_mode_callback
,
"pushl %ebp
\n\t
"
__ASM_CFI
(
".cfi_adjust_cfa_offset 4
\n\t
"
)
__ASM_CFI
(
".cfi_rel_offset %ebp,0
\n\t
"
)
"movl %esp,%ebp
\n\t
"
__ASM_CFI
(
".cfi_def_cfa_register %ebp
\n\t
"
)
"pushl %ebx
\n\t
"
__ASM_CFI
(
".cfi_rel_offset %ebx,-4
\n\t
"
)
"pushl %esi
\n\t
"
__ASM_CFI
(
".cfi_rel_offset %esi,-8
\n\t
"
)
"pushl %edi
\n\t
"
__ASM_CFI
(
".cfi_rel_offset %edi,-12
\n\t
"
)
"movl 0x18(%ebp),%edx
\n\t
"
/* teb */
"pushl 0(%edx)
\n\t
"
/* teb->Tib.ExceptionList */
"subl $0x384,%esp
\n\t
"
/* sizeof(struct syscall_frame) + ebp */
"andl $~63,%esp
\n\t
"
"movl %ebp,0x380(%esp)
\n\t
"
"movl 0x1f8(%edx),%ecx
\n\t
"
/* x86_thread_data()->syscall_frame */
"movl (%ecx),%eax
\n\t
"
/* frame->syscall_flags */
"movl %eax,(%esp)
\n\t
"
"movl 0x38(%ecx),%eax
\n\t
"
/* frame->syscall_table */
"movl %eax,0x38(%esp)
\n\t
"
"movl %ecx,0x3c(%esp)
\n\t
"
/* frame->prev_frame */
"movl %esp,0x1f8(%edx)
\n\t
"
/* x86_thread_data()->syscall_frame */
"movl 8(%ebp),%ecx
\n\t
"
/* func */
"movl 12(%ebp),%esp
\n\t
"
/* stack */
"xorl %ebp,%ebp
\n\t
"
"jmpl *%ecx"
)
/***********************************************************************
* user_mode_callback_return
*/
extern
void
CDECL
DECLSPEC_NORETURN
user_mode_callback_return
(
void
*
ret_ptr
,
ULONG
ret_len
,
NTSTATUS
status
,
TEB
*
teb
);
__ASM_GLOBAL_FUNC
(
user_mode_callback_return
,
"movl 16(%esp),%edx
\n
"
/* teb */
"movl 0x1f8(%edx),%eax
\n\t
"
/* x86_thread_data()->syscall_frame */
"movl 0x3c(%eax),%ecx
\n\t
"
/* frame->prev_frame */
"movl %ecx,0x1f8(%edx)
\n\t
"
/* x86_thread_data()->syscall_frame */
"movl 0x380(%eax),%ebp
\n\t
"
/* call_user_mode_callback ebp */
__ASM_CFI
(
".cfi_adjust_cfa_offset 4
\n\t
"
)
__ASM_CFI
(
".cfi_rel_offset %ebp,0
\n\t
"
)
__ASM_CFI
(
".cfi_def_cfa_register %ebp
\n\t
"
)
__ASM_CFI
(
".cfi_rel_offset %ebx,-4
\n\t
"
)
__ASM_CFI
(
".cfi_rel_offset %esi,-8
\n\t
"
)
__ASM_CFI
(
".cfi_rel_offset %edi,-12
\n\t
"
)
"movl 4(%esp),%esi
\n\t
"
/* ret_ptr */
"movl 8(%esp),%edi
\n\t
"
/* ret_len */
"movl 12(%esp),%eax
\n\t
"
/* status */
"leal -16(%ebp),%esp
\n\t
"
"movl 0x10(%ebp),%ecx
\n\t
"
/* ret_ptr */
"movl %esi,(%ecx)
\n\t
"
"movl 0x14(%ebp),%ecx
\n\t
"
/* ret_len */
"movl %edi,(%ecx)
\n\t
"
"popl 0(%edx)
\n\t
"
/* teb->Tib.ExceptionList */
"popl %edi
\n\t
"
__ASM_CFI
(
".cfi_same_value %edi
\n\t
"
)
"popl %esi
\n\t
"
__ASM_CFI
(
".cfi_same_value %esi
\n\t
"
)
"popl %ebx
\n\t
"
__ASM_CFI
(
".cfi_same_value %ebx
\n\t
"
)
"leave
\n
"
__ASM_CFI
(
".cfi_def_cfa %esp,4
\n\t
"
)
__ASM_CFI
(
".cfi_same_value %ebp
\n\t
"
)
"ret"
)
/***********************************************************************
* KeUserModeCallback
*/
NTSTATUS
WINAPI
KeUserModeCallback
(
ULONG
id
,
const
void
*
args
,
ULONG
len
,
void
**
ret_ptr
,
ULONG
*
ret_len
)
{
struct
user_callback_frame
callback_frame
=
{
{
0
},
ret_ptr
,
ret_len
};
struct
syscall_frame
*
frame
=
x86_thread_data
()
->
syscall_frame
;
void
*
args_data
=
(
void
*
)((
frame
->
esp
-
len
)
&
~
15
);
ULONG_PTR
*
stack
=
args_data
;
/* if we have no syscall frame, call the callback directly */
if
((
char
*
)
&
callback_
frame
<
(
char
*
)
ntdll_get_thread_data
()
->
kernel_stack
||
(
char
*
)
&
callback_
frame
>
(
char
*
)
x86_thread_data
()
->
syscall_frame
)
if
((
char
*
)
&
frame
<
(
char
*
)
ntdll_get_thread_data
()
->
kernel_stack
||
(
char
*
)
&
frame
>
(
char
*
)
x86_thread_data
()
->
syscall_frame
)
{
NTSTATUS
(
WINAPI
*
func
)(
const
void
*
,
ULONG
)
=
((
void
**
)
NtCurrentTeb
()
->
Peb
->
KernelCallbackTable
)[
id
];
return
func
(
args
,
len
);
}
if
((
char
*
)
ntdll_get_thread_data
()
->
kernel_stack
+
min_kernel_stack
>
(
char
*
)
&
callback_
frame
)
if
((
char
*
)
ntdll_get_thread_data
()
->
kernel_stack
+
min_kernel_stack
>
(
char
*
)
&
frame
)
return
STATUS_STACK_OVERFLOW
;
if
(
!
__wine_setjmpex
(
&
callback_frame
.
jmpbuf
,
NULL
))
{
struct
syscall_frame
*
frame
=
x86_thread_data
()
->
syscall_frame
;
void
*
args_data
=
(
void
*
)((
frame
->
esp
-
len
)
&
~
15
);
ULONG_PTR
*
stack
=
args_data
;
memcpy
(
args_data
,
args
,
len
);
*
(
--
stack
)
=
0
;
*
(
--
stack
)
=
len
;
*
(
--
stack
)
=
(
ULONG_PTR
)
args_data
;
*
(
--
stack
)
=
id
;
*
(
--
stack
)
=
0xdeadbabe
;
callback_frame
.
frame
.
esp
=
(
ULONG_PTR
)
stack
;
callback_frame
.
frame
.
eip
=
(
ULONG_PTR
)
pKiUserCallbackDispatcher
;
callback_frame
.
frame
.
eflags
=
0x202
;
callback_frame
.
frame
.
syscall_flags
=
frame
->
syscall_flags
;
callback_frame
.
frame
.
syscall_table
=
frame
->
syscall_table
;
callback_frame
.
frame
.
prev_frame
=
frame
;
callback_frame
.
teb_frame
=
NtCurrentTeb
()
->
Tib
.
ExceptionList
;
x86_thread_data
()
->
syscall_frame
=
&
callback_frame
.
frame
;
__wine_syscall_dispatcher_return
(
&
callback_frame
.
frame
,
0
);
}
return
callback_frame
.
status
;
memcpy
(
args_data
,
args
,
len
);
*
(
--
stack
)
=
0
;
*
(
--
stack
)
=
len
;
*
(
--
stack
)
=
(
ULONG_PTR
)
args_data
;
*
(
--
stack
)
=
id
;
*
(
--
stack
)
=
0xdeadbabe
;
return
call_user_mode_callback
(
pKiUserCallbackDispatcher
,
stack
,
ret_ptr
,
ret_len
,
NtCurrentTeb
()
);
}
...
...
@@ -1632,16 +1680,8 @@ NTSTATUS WINAPI KeUserModeCallback( ULONG id, const void *args, ULONG len, void
*/
NTSTATUS
WINAPI
NtCallbackReturn
(
void
*
ret_ptr
,
ULONG
ret_len
,
NTSTATUS
status
)
{
struct
user_callback_frame
*
frame
=
(
struct
user_callback_frame
*
)
x86_thread_data
()
->
syscall_frame
;
if
(
!
frame
->
frame
.
prev_frame
)
return
STATUS_NO_CALLBACK_ACTIVE
;
*
frame
->
ret_ptr
=
ret_ptr
;
*
frame
->
ret_len
=
ret_len
;
frame
->
status
=
status
;
x86_thread_data
()
->
syscall_frame
=
frame
->
frame
.
prev_frame
;
NtCurrentTeb
()
->
Tib
.
ExceptionList
=
frame
->
teb_frame
;
__wine_longjmp
(
&
frame
->
jmpbuf
,
1
);
if
(
!
x86_thread_data
()
->
syscall_frame
->
prev_frame
)
return
STATUS_NO_CALLBACK_ACTIVE
;
user_mode_callback_return
(
ret_ptr
,
ret_len
,
status
,
NtCurrentTeb
()
);
}
...
...
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