winebuild: Add SEH information to relay entry points on ARM64.

dlls/ntdll/relay.c

@@ -646,10 +646,11 @@ DECLSPEC_HIDDEN void WINAPI relay_trace_exit( struct relay_descr *descr, unsigne
 extern LONGLONG CDECL call_entry_point( void *func, int nb_args, const INT_PTR *args );
 __ASM_GLOBAL_FUNC( call_entry_point,
                    "stp x29, x30, [SP,#-16]!\n\t"
-                   "stp x19, x20, [SP,#-16]!\n\t"
+                   __ASM_SEH(".seh_save_fplr_x 16\n\t")
                    "mov x29, SP\n\t"
-                   "mov x19, x2\n\t"
-                   "ldp x8, x9, [x19, #-32]\n\t"
+                   __ASM_SEH(".seh_set_fp\n\t")
+                   __ASM_SEH(".seh_endprologue\n\t")
+                   "ldr x8, [x2, #-32]\n\t"
                    "mov x9, x0\n\t"
                    "cbz w1, 2f\n\t"
                    "mov w10, w1\n\t"
@@ -682,7 +683,6 @@ __ASM_GLOBAL_FUNC( call_entry_point,
                    "cbnz w12, 1b\n\t"
                    "2: blr x9\n\t"
                    "mov SP, x29\n\t"
-                   "ldp x19, x20, [SP], #16\n\t"
                    "ldp x29, x30, [SP], #16\n\t"
                    "ret\n" )
 

tools/winebuild/spec32.c

@@ -329,28 +329,30 @@ static void output_relay_debug( DLLSPEC *spec )
         }
 
         case CPU_ARM64:
+        {
+            int stack_size = 16 * ((min(odp->u.func.nb_args, 8) + 1) / 2);
+
             output( "\t.align %d\n", get_alignment(4) );
             output( "__wine_spec_relay_entry_point_%d:\n", i );
-            output_cfi( ".cfi_startproc" );
-            switch (odp->u.func.nb_args)
+            output_cfi( ".seh_proc __wine_spec_relay_entry_point_%d", i );
+            output( "\tstp x29, x30, [sp, #-%u]!\n", stack_size + 16 );
+            output_cfi( ".seh_save_fplr_x %u", stack_size + 16 );
+            output( "\tmov x29, sp\n" );
+            output_cfi( ".seh_set_fp" );
+            output_cfi( ".seh_endprologue" );
+            switch (stack_size)
             {
-            default:
-            case 8:
-            case 7:  output( "\tstp x6, x7, [SP,#-16]!\n" );
+            case 64: output( "\tstp x6, x7, [sp, #64]\n" );
             /* fall through */
-            case 6:
-            case 5:  output( "\tstp x4, x5, [SP,#-16]!\n" );
+            case 48: output( "\tstp x4, x5, [sp, #48]\n" );
             /* fall through */
-            case 4:
-            case 3:  output( "\tstp x2, x3, [SP,#-16]!\n" );
+            case 32: output( "\tstp x2, x3, [sp, #32]\n" );
             /* fall through */
-            case 2:
-            case 1:  output( "\tstp x0, x1, [SP,#-16]!\n" );
+            case 16: output( "\tstp x0, x1, [sp, #16]\n" );
             /* fall through */
-            case 0:  break;
+            default: break;
             }
-            output( "\tmov x2, SP\n");
-            output( "\tstp x29, x30, [SP,#-16]!\n" );
+            output( "\tadd x2, sp, #16\n");
             output( "\tstp x8, x9, [SP,#-16]!\n" );
             output( "\tmov w1, #%u\n", odp->u.func.args_str_offset << 16 );
             if (i - spec->base) output( "\tadd w1, w1, #%u\n", i - spec->base );
@@ -358,13 +360,12 @@ static void output_relay_debug( DLLSPEC *spec )
             output( "\tadd x0, x0, #%s\n", arm64_pageoff(".L__wine_spec_relay_descr") );
             output( "\tldr x3, [x0, #8]\n");
             output( "\tblr x3\n");
-            output( "\tadd SP, SP, #16\n" );
-            output( "\tldp x29, x30, [SP], #16\n" );
-            if (odp->u.func.nb_args)
-                output( "\tadd SP, SP, #%u\n", 8 * ((min(odp->u.func.nb_args, 8) + 1) & ~1) );
+            output( "\tmov sp, x29\n" );
+            output( "\tldp x29, x30, [sp], #%u\n", stack_size + 16 );
             output( "\tret\n");
-            output_cfi( ".cfi_endproc" );
+            output_cfi( ".seh_endproc" );
             break;
+        }
 
         case CPU_x86_64:
             output( "\t.align %d\n", get_alignment(4) );