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wow64: Use a .seh handler in raise_exception().

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Alexandre Julliard 2024-03-21 18:11:36 +01:00
parent e317eafe8f
commit d2c0efe163
1 changed files with 79 additions and 56 deletions
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135
dlls/wow64/syscall.c
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@ -184,7 +184,8 @@ static NTSTATUS get_context_return_value( void *wow_context )
/**********************************************************************
* call_user_exception_dispatcher
*/
static void call_user_exception_dispatcher( EXCEPTION_RECORD32 *rec, void *ctx32_ptr, void *ctx64_ptr )
static void __attribute__((used)) call_user_exception_dispatcher( EXCEPTION_RECORD32 *rec, void *ctx32_ptr,
void *ctx64_ptr )
{
switch (current_machine)
{
@ -331,40 +332,82 @@ static void call_raise_user_exception_dispatcher( ULONG code )
/* based on RtlRaiseException: call NtRaiseException with context setup to return to caller */
void WINAPI raise_exception( EXCEPTION_RECORD *rec, CONTEXT *context, BOOL first_chance );
#ifdef __x86_64__
void WINAPI raise_exception( EXCEPTION_RECORD32 *rec32, void *ctx32,
BOOL first_chance, EXCEPTION_RECORD *rec );
#ifdef __aarch64__
__ASM_GLOBAL_FUNC( raise_exception,
"sub $0x28,%rsp\n\t"
__ASM_SEH(".seh_stackalloc 0x28\n\t")
__ASM_SEH(".seh_endprologue\n\t")
__ASM_CFI(".cfi_adjust_cfa_offset 0x28\n\t")
"movq %rcx,(%rsp)\n\t"
"movq %rdx,%rcx\n\t"
"call " __ASM_NAME("RtlCaptureContext") "\n\t"
"leaq 0x30(%rsp),%rax\n\t" /* orig stack pointer */
"movq %rax,0x98(%rdx)\n\t" /* context->Rsp */
"movq (%rsp),%rcx\n\t" /* original first parameter */
"movq 0x28(%rsp),%rax\n\t" /* return address */
"movq %rax,0xf8(%rdx)\n\t" /* context->Rip */
"call " __ASM_NAME("NtRaiseException") )
#elif defined(__aarch64__)
__ASM_GLOBAL_FUNC( raise_exception,
"stp x29, x30, [sp, #-32]!\n\t"
__ASM_SEH(".seh_save_fplr_x 32\n\t")
__ASM_SEH(".seh_endprologue\n\t")
__ASM_CFI(".cfi_def_cfa x29, 32\n\t")
__ASM_CFI(".cfi_offset x30, -24\n\t")
__ASM_CFI(".cfi_offset x29, -32\n\t")
"mov x29, sp\n\t"
"sub sp, sp, #0x390\n\t" /* sizeof(context) */
".seh_stackalloc 0x390\n\t"
"stp x29, x30, [sp, #-48]!\n\t"
".seh_save_fplr_x 48\n\t"
".seh_endprologue\n\t"
".seh_handler raise_exception_handler, @except\n\t"
"stp x0, x1, [sp, #16]\n\t"
"mov x0, x1\n\t"
"bl " __ASM_NAME("RtlCaptureContext") "\n\t"
"ldp x0, x1, [sp, #16]\n\t" /* orig parameters */
"ldp x4, x5, [sp]\n\t" /* frame pointer, return address */
"stp x4, x5, [x1, #0xf0]\n\t" /* context->Fp, Lr */
"add x4, sp, #32\n\t" /* orig stack pointer */
"stp x4, x5, [x1, #0x100]\n\t" /* context->Sp, Pc */
"bl " __ASM_NAME("NtRaiseException") )
"stp x2, x3, [sp, #32]\n\t"
"add x0, sp, #48\n\t"
"bl RtlCaptureContext\n\t"
"add x1, sp, #48\n\t" /* context */
"adr x2, 1f\n\t" /* return address */
"str x2, [x1, #0x108]\n\t" /* context->Pc */
"ldp x2, x0, [sp, #32]\n\t" /* first_chance, rec */
"bl NtRaiseException\n"
"raise_exception_ret:\n\t"
"ldp x0, x1, [sp, #16]\n\t" /* rec32, ctx32 */
"add x2, sp, #48\n\t" /* context */
"bl call_user_exception_dispatcher\n"
"1:\tnop\n\t"
"ldp x29, x30, [sp], #48\n\t"
"add sp, sp, #0x390\n\t"
"ret" )
__ASM_GLOBAL_FUNC( raise_exception_handler,
"stp x29, x30, [sp, #-16]!\n\t"
".seh_save_fplr_x 16\n\t"
".seh_endprologue\n\t"
"ldr w4, [x0, #4]\n\t" /* record->ExceptionFlags */
"tst w4, #6\n\t" /* EXCEPTION_UNWINDING | EXCEPTION_EXIT_UNWIND */
"b.ne 1f\n\t"
"mov x2, x0\n\t" /* rec */
"mov x0, x1\n\t" /* frame */
"adr x1, raise_exception_ret\n\t"
"bl RtlUnwind\n"
"1:\tmov w0, #1\n\t" /* ExceptionContinueSearch */
"ldp x29, x30, [sp], #16\n\t"
"ret" )
#else
__ASM_GLOBAL_FUNC( raise_exception,
"sub $0x4d8,%rsp\n\t" /* sizeof(context) + alignment */
".seh_stackalloc 0x4d8\n\t"
".seh_endprologue\n\t"
".seh_handler raise_exception_handler, @except\n\t"
"movq %rcx,0x4e0(%rsp)\n\t"
"movq %rdx,0x4e8(%rsp)\n\t"
"movq %r8,0x4f0(%rsp)\n\t"
"movq %r9,0x4f8(%rsp)\n\t"
"movq %rsp,%rcx\n\t"
"call RtlCaptureContext\n\t"
"movq %rsp,%rdx\n\t" /* context */
"leaq 1f(%rip),%rax\n\t" /* return address */
"movq %rax,0xf8(%rdx)\n\t" /* context->Rip */
"movq 0x4f8(%rsp),%rcx\n\t" /* rec */
"movq 0x4f0(%rsp),%r8\n\t" /* first_chance */
"call NtRaiseException\n"
"raise_exception_ret:\n\t"
"mov 0x4e0(%rsp),%rcx\n\t" /* rec32 */
"mov 0x4e8(%rsp),%rdx\n\t" /* ctx32 */
"movq %rsp,%r8\n\t" /* context */
"call call_user_exception_dispatcher\n"
"1:\tnop\n\t"
"add $0x4d8,%rsp\n\t"
"ret" )
__ASM_GLOBAL_FUNC( raise_exception_handler,
"sub $0x28,%rsp\n\t"
".seh_stackalloc 0x28\n\t"
".seh_endprologue\n\t"
"movq %rcx,%r8\n\t" /* rec */
"movq %rdx,%rcx\n\t" /* frame */
"leaq raise_exception_ret(%rip),%rdx\n\t"
"call RtlUnwind\n\t"
"int3" )
#endif
@ -563,20 +606,8 @@ NTSTATUS WINAPI wow64_NtRaiseException( UINT *args )
void *context32 = get_ptr( &args );
BOOL first_chance = get_ulong( &args );
EXCEPTION_RECORD *rec = exception_record_32to64( rec32 );
CONTEXT context;
pBTCpuSetContext( GetCurrentThread(), GetCurrentProcess(), NULL, context32 );
__TRY
{
raise_exception( rec, &context, first_chance );
}
__EXCEPT_ALL
{
call_user_exception_dispatcher( rec32, context32, &context );
}
__ENDTRY
raise_exception( rec32, context32, first_chance, exception_record_32to64( rec32 ));
return STATUS_SUCCESS;
}
@ -1357,7 +1388,6 @@ void WINAPI Wow64ProcessPendingCrossProcessItems(void)
NTSTATUS WINAPI Wow64RaiseException( int code, EXCEPTION_RECORD *rec )
{
EXCEPTION_RECORD32 rec32;
CONTEXT context;
BOOL first_chance = TRUE;
union
{
@ -1441,14 +1471,7 @@ NTSTATUS WINAPI Wow64RaiseException( int code, EXCEPTION_RECORD *rec )
}
exception_record_64to32( &rec32, rec );
__TRY
{
raise_exception( rec, &context, first_chance );
}
__EXCEPT_ALL
{
call_user_exception_dispatcher( &rec32, &ctx32, NULL );
}
__ENDTRY
raise_exception( &rec32, &ctx32, first_chance, rec );
return STATUS_SUCCESS;
}