Alexandre Julliard : ntdll: Don't pass arguments on the stack for user callbacks on i386.
Module: wine Branch: master Commit: d8c39b3d5ace3a7349cb2762aad84ced5bb1563a URL: https://gitlab.winehq.org/wine/wine/-/commit/d8c39b3d5ace3a7349cb2762aad84ce...
Author: Alexandre Julliard julliard@winehq.org Date: Thu Jun 1 12:44:21 2023 +0200
ntdll: Don't pass arguments on the stack for user callbacks on i386.
---
dlls/ntdll/unix/signal_i386.c | 33 ++++++++++++++++----------------- 1 file changed, 16 insertions(+), 17 deletions(-)
diff --git a/dlls/ntdll/unix/signal_i386.c b/dlls/ntdll/unix/signal_i386.c index 748828ad99e..28cd29f4960 100644 --- a/dlls/ntdll/unix/signal_i386.c +++ b/dlls/ntdll/unix/signal_i386.c @@ -1574,8 +1574,8 @@ 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, "pushl %ebp\n\t" __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t") @@ -1588,7 +1588,7 @@ __ASM_GLOBAL_FUNC( call_user_mode_callback, __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 */ + "movl 0x20(%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" @@ -1600,8 +1600,13 @@ __ASM_GLOBAL_FUNC( call_user_mode_callback, "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 */ + "movl 0x1c(%ebp),%ecx\n\t" /* func */ + "movl 0x0c(%ebp),%edx\n\t" /* args */ + "leal -4(%edx),%esp\n\t" + "pushl 0x10(%ebp)\n\t" /* len */ + "pushl %edx\n\t" /* args */ + "pushl 0x08(%ebp)\n\t" /* id */ + "pushl $0\n\t" "xorl %ebp,%ebp\n\t" "jmpl *%ecx" )
@@ -1609,8 +1614,8 @@ __ASM_GLOBAL_FUNC( call_user_mode_callback, /*********************************************************************** * 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, "movl 16(%esp),%edx\n" /* teb */ "movl 0x1f8(%edx),%eax\n\t" /* x86_thread_data()->syscall_frame */ @@ -1627,9 +1632,9 @@ __ASM_GLOBAL_FUNC( user_mode_callback_return, "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 0x14(%ebp),%ecx\n\t" /* ret_ptr */ "movl %esi,(%ecx)\n\t" - "movl 0x14(%ebp),%ecx\n\t" /* ret_len */ + "movl 0x18(%ebp),%ecx\n\t" /* ret_len */ "movl %edi,(%ecx)\n\t" "popl 0(%edx)\n\t" /* teb->Tib.ExceptionList */ "popl %edi\n\t" @@ -1651,19 +1656,13 @@ NTSTATUS WINAPI KeUserModeCallback( ULONG id, const void *args, ULONG len, void { struct syscall_frame *frame = x86_thread_data()->syscall_frame; void *args_data = (void *)((frame->esp - 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; - *(--stack) = 0xdeadbabe; - - 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() ); }
-
Alexandre Julliard