Mon Oct 15 10:37:15 CEST 2007 Paolo Molaro <lupus@ximian.com>
[mono.git] / mono / mini / mini-s390.c
index c99388796f802cbee350146155cf5f46d8df2933..601de45185b401d3b32e29398d1f48d85cf4798f 100644 (file)
@@ -221,6 +221,7 @@ typedef struct {
 
 typedef struct {
        int nargs;
+       int lastgr;
        guint32 stack_usage;
        guint32 struct_ret;
        ArgInfo ret;
@@ -239,7 +240,6 @@ typedef struct {
 /*                   P r o t o t y p e s                            */
 /*------------------------------------------------------------------*/
 
-static guint8 * emit_memcpy (guint8 *, int, int, int, int, int);
 static void indent (int);
 static guint8 * backUpStackPtr(MonoCompile *, guint8 *, gint);
 static void decodeParm (MonoType *, void *, int);
@@ -255,6 +255,7 @@ static guchar * emit_float_to_int (MonoCompile *, guchar *, int, int, int, gbool
 static void mono_arch_break(void);
 gpointer mono_arch_get_lmf_addr (void);
 static guint8 * emit_load_volatile_registers(guint8 *, MonoCompile *);
+static void emit_sig_cookie (MonoCompile *, MonoCallInst *, CallInfo *, int);
 
 /*========================= End of Prototypes ======================*/
 
@@ -266,8 +267,6 @@ int mono_exc_esp_offset = 0;
 
 static int indent_level = 0;
 
-static const char*const * ins_spec = s390_cpu_desc;
-
 static gboolean tls_offset_inited = FALSE;
 
 static int appdomain_tls_offset = -1,
@@ -340,56 +339,6 @@ mono_arch_fregname (int reg) {
 
 /*========================= End of Function ========================*/
 
-/*------------------------------------------------------------------*/
-/*                                                                  */
-/* Name                - emit_memcpy                                       */
-/*                                                                  */
-/* Function    - Emit code to move from memory-to-memory based on  */
-/*               the size of the variable. r0 is overwritten.      */
-/*                                                                  */
-/*------------------------------------------------------------------*/
-
-static guint8 *
-emit_memcpy (guint8 *code, int size, int dreg, int doffset, int sreg, int soffset)
-{
-       switch (size) {
-               case 4 :
-                       s390_l  (code, s390_r0, 0, sreg, soffset);
-                       s390_st (code, s390_r0, 0, dreg, doffset);
-                       break;
-
-               case 3 : 
-                       s390_icm  (code, s390_r0, 14, sreg, soffset);
-                       s390_stcm (code, s390_r0, 14, dreg, doffset);
-                       break;
-
-               case 2 : 
-                       s390_lh  (code, s390_r0, 0, sreg, soffset);
-                       s390_sth (code, s390_r0, 0, dreg, doffset);
-                       break;
-
-               case 1 : 
-                       s390_ic  (code, s390_r0, 0, sreg, soffset);
-                       s390_stc (code, s390_r0, 0, dreg, doffset);
-                       break;
-       
-               default : 
-                       while (size > 0) {
-                               int len;
-
-                               if (size > 256) 
-                                       len = 256;
-                               else
-                                       len = size;
-                               s390_mvc (code, len, dreg, doffset, sreg, soffset);
-                               size -= len;
-                       }
-       }
-       return code;
-}
-
-/*========================= End of Function ========================*/
-
 /*------------------------------------------------------------------*/
 /*                                                                  */
 /* Name                - arch_get_argument_info                            */
@@ -434,7 +383,7 @@ mono_arch_get_argument_info (MonoMethodSignature *csig,
                if (csig->pinvoke)
                        size = mono_type_native_stack_size (csig->params [k], &align);
                else
-                       size = mono_type_stack_size (csig->params [k], &align);
+                       size = mini_type_stack_size (NULL, csig->params [k], &align);
 
                frame_size += pad = (align - (frame_size & (align - 1))) & (align - 1); 
                arg_info [k].pad = pad;
@@ -701,7 +650,6 @@ static void
 enter_method (MonoMethod *method, RegParm *rParm, char *sp)
 {
        int i, oParm = 0, iParm = 0;
-       MonoClass *class;
        MonoObject *obj;
        MonoMethodSignature *sig;
        char *fname;
@@ -711,15 +659,7 @@ enter_method (MonoMethod *method, RegParm *rParm, char *sp)
        size_data sz;
        void *curParm;
 
-
-lc++;
-if (lc > 5000000) {
-fseek(stdout, 0L, SEEK_SET);
-lc = 0;
-}
        fname = mono_method_full_name (method, TRUE);
-if (strcmp(fname,"NUnit.Framework.Assertion:AssertEquals (string,object,object)") == 0)
-printf("!!\n");
        indent (1);
        printf ("ENTER: %s(", fname);
        g_free (fname);
@@ -735,7 +675,7 @@ printf("!!\n");
        cinfo = calculate_sizes (sig, &sz, sig->pinvoke);
 
        if (cinfo->struct_ret) {
-               printf ("[VALUERET:%p], ", (gpointer) rParm->gr[0]);
+               printf ("[STRUCTRET:%p], ", (gpointer) rParm->gr[0]);
                iParm = 1;
        }
 
@@ -983,21 +923,39 @@ handle_enum:
                        }
 
                        size = mono_type_size (type, &align);
-                       printf ("[");
-                       for (j = 0; p && j < size; j++)
-                               printf ("%02x,", p [j]);
-                       printf ("]");
-               }
+                       switch (size) {
+                       case 1:
+                       case 2:
+                       case 4:
+                       case 8:
+                               printf ("[");
+                               for (j = 0; p && j < size; j++)
+                                       printf ("%02x,", p [j]);
+                               printf ("]\n");
+                               break;
+                       default:
+                               printf ("[VALUERET]\n");
+                       }
+               }       
                break;
        }
        case MONO_TYPE_TYPEDBYREF: {
                guint8 *p = va_arg (ap, gpointer);
                int j, size, align;
                size = mono_type_size (type, &align);
-               printf ("[");
-               for (j = 0; p && j < size; j++)
-                       printf ("%02x,", p [j]);
-               printf ("]");
+               switch (size) {
+               case 1:
+               case 2:
+               case 4:
+               case 8:
+                       printf ("[");
+                       for (j = 0; p && j < size; j++)
+                               printf ("%02x,", p [j]);
+                       printf ("]\n");
+                       break;
+               default:
+                       printf ("[TYPEDBYREF]\n");
+               }
        }
                break;
        default:
@@ -1034,6 +992,23 @@ mono_arch_cpu_init (void)
 
 /*========================= End of Function ========================*/
 
+
+/*
+ * Initialize architecture specific code.
+ */
+void
+mono_arch_init (void)
+{
+}
+
+/*
+ * Cleanup architecture specific code.
+ */
+void
+mono_arch_cleanup (void)
+{
+}
+
 /*------------------------------------------------------------------*/
 /*                                                                  */
 /* Name                - mono_arch_cpu_optimizazions                       */
@@ -1074,6 +1049,8 @@ is_regsize_var (MonoType *t) {
        case MONO_TYPE_U4:
        case MONO_TYPE_I:
        case MONO_TYPE_U:
+       case MONO_TYPE_PTR:
+       case MONO_TYPE_FNPTR:
                return TRUE;
        case MONO_TYPE_OBJECT:
        case MONO_TYPE_STRING:
@@ -1186,6 +1163,8 @@ mono_arch_flush_icache (guint8 *code, gint size)
 static void inline
 add_general (guint *gr, size_data *sz, ArgInfo *ainfo, gboolean simple)
 {
+       int disp;
+
        if (simple) {
                if (*gr > S390_LAST_ARG_REG) {
                        sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
@@ -1202,13 +1181,15 @@ add_general (guint *gr, size_data *sz, ArgInfo *ainfo, gboolean simple)
                }
        } else {
                if (*gr > S390_LAST_ARG_REG - 1) {
+                       disp            = sz->stack_size;
                        sz->stack_size  = S390_ALIGN(sz->stack_size, S390_STACK_ALIGNMENT);
+                       disp            = sz->stack_size - disp;
                        ainfo->offset   = sz->stack_size;
                        ainfo->reg      = STK_BASE;
                        ainfo->regtype  = RegTypeBase;
                        sz->stack_size += sizeof(long long);
-                       sz->local_size += sizeof(long long);
-                       sz->offStruct  += sizeof(long long);
+                       sz->local_size += (sizeof(long long) + disp);
+                       sz->offStruct  += (sizeof(long long) + disp);
                        sz->code_size  += 10;   
                } else {
                        ainfo->reg      = *gr;
@@ -1235,7 +1216,6 @@ add_stackParm (guint *gr, size_data *sz, ArgInfo *ainfo, gint size)
 {
        if (*gr > S390_LAST_ARG_REG) {
                sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
-               ainfo->offset   = sz->stack_size;
                ainfo->reg      = STK_BASE;
                sz->parm_size  += sizeof(gpointer);
                sz->offStruct  += sizeof(gpointer);
@@ -1243,13 +1223,13 @@ add_stackParm (guint *gr, size_data *sz, ArgInfo *ainfo, gint size)
                ainfo->reg      = *gr;
        }
        (*gr) ++;
+       ainfo->offset   = sz->stack_size;
        ainfo->offparm  = sz->offset;
        sz->offset      = S390_ALIGN(sz->offset+size, sizeof(long));
        ainfo->size     = size;
        ainfo->regtype  = RegTypeStructByAddr; 
        ainfo->vtsize   = size;
        sz->parm_size  += size;
-
 }
 
 /*========================= End of Function ========================*/
@@ -1356,10 +1336,17 @@ enum_retvalue:
                        cinfo->ret.reg = s390_r2;
                        sz->code_size += 4;
                        break;
+               case MONO_TYPE_GENERICINST:
+                       if (!mono_type_generic_inst_is_valuetype (sig->ret)) {
+                               cinfo->ret.reg = s390_r2;
+                               sz->code_size += 4;
+                               break;
+                       }
+                       /* Fall through */
                case MONO_TYPE_VALUETYPE: {
                        MonoClass *klass = mono_class_from_mono_type (sig->ret);
-                       if (sig->ret->data.klass->enumtype) {
-                               simpletype = sig->ret->data.klass->enum_basetype->type;
+                       if (klass->enumtype) {
+                               simpletype = klass->enum_basetype->type;
                                goto enum_retvalue;
                        }
                        if (sig->pinvoke)
@@ -1385,7 +1372,7 @@ enum_retvalue:
                case MONO_TYPE_VOID:
                        break;
                default:
-                       g_error ("Can't handle as return value 0x%x", sig->ret->type);
+                       g_error ("mini-s390: cannot handle as return value 0x%x (0x%x)", sig->ret->type,simpletype);
        }
 
        if (sig->hasthis) {
@@ -1469,6 +1456,14 @@ enum_retvalue:
                        add_float (&fr, sz, cinfo->args+nParm);
                        nParm++;
                        break;
+               case MONO_TYPE_GENERICINST:
+                       if (!mono_type_generic_inst_is_valuetype (sig->params [i])) {
+                               cinfo->args[nParm].size = sizeof(gpointer);
+                               add_general (&gr, sz, cinfo->args+nParm, TRUE);
+                               nParm++;
+                               break;
+                       }
+                       /* Fall through */
                case MONO_TYPE_VALUETYPE: {
                        MonoMarshalType *info;
                        MonoClass *klass = mono_class_from_mono_type (sig->params [i]);
@@ -1519,7 +1514,7 @@ enum_retvalue:
                                        cinfo->args[nParm].size    = sizeof(long long);
                                        cinfo->args[nParm].regtype = RegTypeStructByVal; 
                                        nParm++;
-                                       sz->local_size            += sizeof(long);
+                                       sz->local_size            += sizeof(long long);
                                        break;
                                default:
                                        add_stackParm(&gr, sz, cinfo->args+nParm, size);
@@ -1554,7 +1549,7 @@ enum_retvalue:
                                        cinfo->args[nParm].size    = sizeof(long long);
                                        cinfo->args[nParm].regtype = RegTypeStructByVal; 
                                        nParm++;
-                                       sz->local_size            += sizeof(long);
+                                       sz->local_size            += sizeof(long long);
                                        break;
                                default:
                                        add_stackParm(&gr, sz, cinfo->args+nParm, size);
@@ -1586,7 +1581,19 @@ enum_retvalue:
                }
        }
 
-       sz->stack_size  = S390_ALIGN(sz->stack_size+sz->offset, sizeof(long));
+       /*----------------------------------------------------------*/
+       /* Handle the case where there are no implicit arguments    */
+       /*----------------------------------------------------------*/
+       if ((sig->call_convention == MONO_CALL_VARARG) &&
+           (sig->param_count == sig->sentinelpos)) {
+               gr = S390_LAST_ARG_REG + 1;
+               add_general (&gr, sz, &cinfo->sigCookie, TRUE);
+       }
+
+       cinfo->lastgr   = gr;
+       sz->stack_size  = sz->stack_size + sz->local_size + sz->parm_size + 
+                         sz->offset;
+       sz->stack_size  = S390_ALIGN(sz->stack_size, sizeof(long));
 
        return (cinfo);
 }
@@ -1619,6 +1626,8 @@ mono_arch_allocate_vars (MonoCompile *cfg)
 
        header  = mono_method_get_header (cfg->method);
 
+       cfg->flags |= MONO_CFG_HAS_SPILLUP;
+
        /*---------------------------------------------------------*/    
        /* We use the frame register also for any method that has  */ 
        /* filter clauses. This way, when the handlers are called, */
@@ -1677,7 +1686,7 @@ mono_arch_allocate_vars (MonoCompile *cfg)
        }
 
        if (sig->hasthis) {
-               inst = cfg->varinfo [0];
+               inst = cfg->args [0];
                if (inst->opcode != OP_REGVAR) {
                        inst->opcode       = OP_REGOFFSET;
                        inst->inst_basereg = frame_reg;
@@ -1696,7 +1705,7 @@ mono_arch_allocate_vars (MonoCompile *cfg)
                cfg->sig_cookie += S390_MINIMAL_STACK_SIZE;
 
        for (iParm = sArg; iParm < eArg; ++iParm) {
-               inst = cfg->varinfo [curinst];
+               inst = cfg->args [curinst];
                if (inst->opcode != OP_REGVAR) {
                        switch (cinfo->args[iParm].regtype) {
                                case RegTypeStructByAddr :
@@ -1706,12 +1715,14 @@ mono_arch_allocate_vars (MonoCompile *cfg)
                                        size               = abs(cinfo->args[iParm].vtsize);
                                        offset             = S390_ALIGN(offset, sizeof(long));
                                        inst->inst_offset  = offset; 
+                                       inst->backend.arg_info       = cinfo->args[iParm].offset;
                                } else {
                                        inst->opcode       = OP_S390_ARGREG;
                                        inst->inst_basereg = frame_reg;
                                        size               = sizeof(gpointer);
                                        offset             = S390_ALIGN(offset, size);
                                        inst->inst_offset  = offset;
+                                       inst->backend.arg_info       = cinfo->args[iParm].offset;
                                }
                                        break;
                                case RegTypeStructByVal :
@@ -1720,6 +1731,7 @@ mono_arch_allocate_vars (MonoCompile *cfg)
                                        size               = cinfo->args[iParm].size;
                                        offset             = S390_ALIGN(offset, size);
                                        inst->inst_offset  = offset;
+                                       inst->backend.arg_info       = cinfo->args[iParm].offset;
                                        break;
                                default :
                                if (cinfo->args[iParm].reg != STK_BASE) {
@@ -1738,7 +1750,7 @@ mono_arch_allocate_vars (MonoCompile *cfg)
                                                              : 0);
                                        inst->inst_offset  = cinfo->args[iParm].offset + 
                                                             size;
-                                       inst->unused       = 0;
+                                       inst->backend.arg_info       = 0;
                                        size               = sizeof(long);
                                } 
                        }
@@ -1760,11 +1772,11 @@ mono_arch_allocate_vars (MonoCompile *cfg)
                        continue;
 
                /*--------------------------------------------------*/
-               /* inst->unused indicates native sized value types, */
+               /* inst->backend.is_pinvoke indicates native sized value types, */
                /* this is used by the pinvoke wrappers when they   */
                /* call functions returning structure               */
                /*--------------------------------------------------*/
-               if (inst->unused && MONO_TYPE_ISSTRUCT (inst->inst_vtype))
+               if (inst->backend.is_pinvoke && MONO_TYPE_ISSTRUCT (inst->inst_vtype))
                        size = mono_class_native_size (mono_class_from_mono_type(inst->inst_vtype), &align);
                else
                        size = mono_type_size (inst->inst_vtype, &align);
@@ -1780,8 +1792,9 @@ mono_arch_allocate_vars (MonoCompile *cfg)
        /*------------------------------------------------------*/
        /* Allow space for the trace method stack area if needed*/
        /*------------------------------------------------------*/
-       if (mono_jit_trace_calls != NULL && mono_trace_eval (cfg->method)) 
+       if (mono_jit_trace_calls != NULL && mono_trace_eval (cfg->method)) {
                offset += S390_TRACE_STACK_SIZE;
+       }
 
        /*------------------------------------------------------*/
        /* Reserve space to save LMF and caller saved registers */
@@ -1817,8 +1830,9 @@ mono_arch_call_opcode (MonoCompile *cfg, MonoBasicBlock* bb,
        MonoMethodSignature *sig;
        int i, n, lParamArea;
        CallInfo *cinfo;
-       ArgInfo *ainfo;
+       ArgInfo *ainfo = NULL;
        size_data sz;
+       int stackSize;
 
        sig = call->signature;
        n = sig->param_count + sig->hasthis;
@@ -1826,8 +1840,8 @@ mono_arch_call_opcode (MonoCompile *cfg, MonoBasicBlock* bb,
        
        cinfo = calculate_sizes (sig, &sz, sig->pinvoke);
 
-       call->stack_usage = MAX((sz.stack_size + sz.local_size + sz.parm_size), 
-                               call->stack_usage);
+       stackSize         = sz.stack_size + sz.local_size + sz.parm_size + sz.offset;
+       call->stack_usage = MAX(stackSize, call->stack_usage);
        lParamArea        = MAX((call->stack_usage-S390_MINIMAL_STACK_SIZE-sz.parm_size), 0);
        cfg->param_area   = MAX(((signed) cfg->param_area), lParamArea);
        cfg->flags       |= MONO_CFG_HAS_CALLS;
@@ -1840,20 +1854,7 @@ mono_arch_call_opcode (MonoCompile *cfg, MonoBasicBlock* bb,
 
                if ((sig->call_convention == MONO_CALL_VARARG) &&
                    (i == sig->sentinelpos)) {
-                       MonoInst *sigArg;
-                       
-                       cfg->disable_aot = TRUE;
-                       MONO_INST_NEW (cfg, sigArg, OP_ICONST);
-                       sigArg->inst_p0 = call->signature;
-
-                       MONO_INST_NEW_CALL_ARG (cfg, arg, OP_OUTARG_MEMBASE);
-                       arg->ins.inst_left  = sigArg;
-                       arg->ins.inst_right = (MonoInst *) call;
-                       arg->size           = ainfo->size;
-                       arg->offset         = cinfo->sigCookie.offset;
-                       call->used_iregs   |= 1 << ainfo->reg;
-                       arg->ins.next       = call->out_args;
-                       call->out_args      = (MonoInst *) arg;
+                       emit_sig_cookie (cfg, call, cinfo, ainfo->size);
                }
 
                if (is_virtual && i == 0) {
@@ -1871,7 +1872,7 @@ mono_arch_call_opcode (MonoCompile *cfg, MonoBasicBlock* bb,
                        call->out_args      = (MonoInst *) arg;
                        arg->ins.inst_right = (MonoInst *) call;
                        if (ainfo->regtype == RegTypeGeneral) {
-                               arg->ins.unused   = ainfo->reg;
+                               arg->ins.backend.reg3   = ainfo->reg;
                                call->used_iregs |= 1 << ainfo->reg;
                                if (arg->ins.type == STACK_I8)
                                        call->used_iregs |= 1 << (ainfo->reg + 1);
@@ -1911,7 +1912,7 @@ mono_arch_call_opcode (MonoCompile *cfg, MonoBasicBlock* bb,
                                arg->offset       = ainfo->offset;
                                call->used_iregs |= 1 << ainfo->reg;
                        } else if (ainfo->regtype == RegTypeFP) {
-                               arg->ins.unused   = ainfo->reg;
+                               arg->ins.backend.reg3   = ainfo->reg;
                                call->used_fregs |= 1 << ainfo->reg;
                                if (ainfo->size == 4)
                                        arg->ins.opcode = OP_OUTARG_R4;
@@ -1922,6 +1923,15 @@ mono_arch_call_opcode (MonoCompile *cfg, MonoBasicBlock* bb,
                        }
                }
        }
+
+       /*
+        * Handle the case where there are no implicit arguments 
+        */
+       if ((sig->call_convention == MONO_CALL_VARARG) &&
+           (i == sig->sentinelpos)) {
+               emit_sig_cookie (cfg, call, cinfo, ainfo->size);
+       }
+
        /*
         * Reverse the call->out_args list.
         */
@@ -1942,6 +1952,53 @@ mono_arch_call_opcode (MonoCompile *cfg, MonoBasicBlock* bb,
 
 /*========================= End of Function ========================*/
 
+/*------------------------------------------------------------------*/
+/*                                                                  */
+/* Name                - emit_sig_cookie.                                  */
+/*                                                                  */
+/* Function    - For variable length parameter lists construct a   */
+/*               signature cookie and emit it.                     */
+/*                                                                 */
+/*------------------------------------------------------------------*/
+
+static void
+emit_sig_cookie (MonoCompile *cfg, MonoCallInst *call, 
+                CallInfo *cinfo, int argSize)
+{
+       MonoCallArgParm *arg;
+       MonoMethodSignature *tmpSig;
+       MonoInst *sigArg;
+                       
+       cfg->disable_aot = TRUE;
+
+       /*----------------------------------------------------------*/
+       /* mono_ArgIterator_Setup assumes the signature cookie is   */
+       /* passed first and all the arguments which were before it  */
+       /* passed on the stack after the signature. So compensate   */
+       /* by passing a different signature.                        */
+       /*----------------------------------------------------------*/
+       tmpSig = mono_metadata_signature_dup (call->signature);
+       tmpSig->param_count -= call->signature->sentinelpos;
+       tmpSig->sentinelpos  = 0;
+       if (tmpSig->param_count > 0)
+               memcpy (tmpSig->params, 
+                       call->signature->params + call->signature->sentinelpos, 
+                       tmpSig->param_count * sizeof(MonoType *));
+
+       MONO_INST_NEW (cfg, sigArg, OP_ICONST);
+       sigArg->inst_p0 = tmpSig;
+
+       MONO_INST_NEW_CALL_ARG (cfg, arg, OP_OUTARG_MEMBASE);
+       arg->ins.inst_left   = sigArg;
+       arg->ins.inst_right  = (MonoInst *) call;
+       arg->size            = argSize;
+       arg->offset          = cinfo->sigCookie.offset;
+       arg->ins.next        = call->out_args;
+       call->out_args       = (MonoInst *) arg;
+}
+
+/*========================= End of Function ========================*/
+
 /*------------------------------------------------------------------*/
 /*                                                                  */
 /* Name                - mono_arch_instrument_mem_needs                    */
@@ -1976,31 +2033,43 @@ mono_arch_instrument_prolog (MonoCompile *cfg, void *func, void *p,
 {
        guchar  *code = p;
        int     parmOffset, 
-               fpOffset;
+               fpOffset,
+               baseReg;
 
        parmOffset = cfg->stack_usage - S390_TRACE_STACK_SIZE;
        if (cfg->method->save_lmf)
                parmOffset -= sizeof(MonoLMF);
        fpOffset   = parmOffset + (5*sizeof(gint32));
+       if (fpOffset > 4096) {
+               s390_lr (code, s390_r12, STK_BASE);
+               baseReg = s390_r12;
+               while (fpOffset > 4096) {
+                       s390_ahi (code, baseReg, 4096);
+                       fpOffset   -= 4096;
+                       parmOffset -= 4096;
+               }
+       } else {
+               baseReg = STK_BASE;
+       }       
 
-       s390_stm  (code, s390_r2, s390_r6, STK_BASE, parmOffset);
-       s390_std  (code, s390_f0, 0, STK_BASE, fpOffset);
-       s390_std  (code, s390_f1, 0, STK_BASE, fpOffset+sizeof(gdouble));
-       s390_std  (code, s390_f2, 0, STK_BASE, fpOffset+2*sizeof(gdouble));
+       s390_stm  (code, s390_r2, s390_r6, baseReg, parmOffset);
+       s390_std  (code, s390_f0, 0, baseReg, fpOffset);
+       s390_std  (code, s390_f1, 0, baseReg, fpOffset+sizeof(gdouble));
+       s390_std  (code, s390_f2, 0, baseReg, fpOffset+2*sizeof(gdouble));
        s390_basr (code, s390_r13, 0);
        s390_j    (code, 6);
        s390_word (code, cfg->method);
        s390_word (code, func);
        s390_l    (code, s390_r2, 0, s390_r13, 4);
-       s390_la   (code, s390_r3, 0, STK_BASE, parmOffset);
+       s390_la   (code, s390_r3, 0, baseReg, parmOffset);
        s390_lr   (code, s390_r4, STK_BASE);
        s390_ahi  (code, s390_r4, cfg->stack_usage);
        s390_l    (code, s390_r1, 0, s390_r13, 8);
        s390_basr (code, s390_r14, s390_r1);
-       s390_ld   (code, s390_f2, 0, STK_BASE, fpOffset+2*sizeof(gdouble));
-       s390_ld   (code, s390_f1, 0, STK_BASE, fpOffset+sizeof(gdouble));
-       s390_ld   (code, s390_f0, 0, STK_BASE, fpOffset);
-       s390_lm   (code, s390_r2, s390_r6, STK_BASE, parmOffset);
+       s390_ld   (code, s390_f2, 0, baseReg, fpOffset+2*sizeof(gdouble));
+       s390_ld   (code, s390_f1, 0, baseReg, fpOffset+sizeof(gdouble));
+       s390_ld   (code, s390_f0, 0, baseReg, fpOffset);
+       s390_lm   (code, s390_r2, s390_r6, baseReg, parmOffset);
 
        return code;
 }
@@ -2225,15 +2294,8 @@ peephole_pass (MonoCompile *cfg, MonoBasicBlock *bb)
                        if (last_ins && (last_ins->opcode == OP_STOREI1_MEMBASE_REG) &&
                                        ins->inst_basereg == last_ins->inst_destbasereg &&
                                        ins->inst_offset == last_ins->inst_offset) {
-                               if (ins->dreg == last_ins->sreg1) {
-                                       last_ins->next = ins->next;                             
-                                       ins = ins->next;                                
-                                       continue;
-                               } else {
-                                       //static int c = 0; printf ("MATCHX %s %d\n", cfg->method->name,c++);
-                                       ins->opcode = OP_MOVE;
-                                       ins->sreg1 = last_ins->sreg1;
-                               }
+                               ins->opcode = (ins->opcode == OP_LOADI1_MEMBASE) ? CEE_CONV_I1 : CEE_CONV_U1;
+                               ins->sreg1 = last_ins->sreg1;                           
                        }
                        break;
                case OP_LOADU2_MEMBASE:
@@ -2241,14 +2303,8 @@ peephole_pass (MonoCompile *cfg, MonoBasicBlock *bb)
                        if (last_ins && (last_ins->opcode == OP_STOREI2_MEMBASE_REG) &&
                                        ins->inst_basereg == last_ins->inst_destbasereg &&
                                        ins->inst_offset == last_ins->inst_offset) {
-                               if (ins->dreg == last_ins->sreg1) {
-                                       last_ins->next = ins->next;                             
-                                       ins = ins->next;                                
-                                       continue;
-                               } else {
-                                       ins->opcode = OP_MOVE;
-                                       ins->sreg1 = last_ins->sreg1;
-                               }
+                               ins->opcode = (ins->opcode == OP_LOADI2_MEMBASE) ? CEE_CONV_I2 : CEE_CONV_U2;
+                               ins->sreg1 = last_ins->sreg1;                           
                        }
                        break;
                case CEE_CONV_I4:
@@ -2333,16 +2389,18 @@ emit_float_to_int (MonoCompile *cfg, guchar *code, int dreg, int sreg, int size,
                                break;
                }
        } else {
+               short *o[1];
                s390_basr   (code, s390_r13, 0);
                s390_j      (code, 10);
                s390_llong  (code, 0x41e0000000000000);
                s390_llong  (code, 0x41f0000000000000);
                s390_ldr    (code, s390_f15, sreg);
-               s390_cdb    (code, s390_f15, 0, s390_r13, 0);
-               s390_jl     (code, 10);
-               s390_sdb    (code, s390_f15, 0, s390_r13, 8);
+               s390_cdb    (code, s390_f15, 0, s390_r13, 4);
+               s390_jl     (code, 0); CODEPTR(code, o[0]);
+               s390_sdb    (code, s390_f15, 0, s390_r13, 12);
                s390_cfdbr  (code, dreg, 7, s390_f15);
                s390_j      (code, 4);
+               PTRSLOT(code, o[0]);
                s390_cfdbr  (code, dreg, 5, sreg);
                switch (size) {
                        case 1: 
@@ -2406,7 +2464,7 @@ mono_arch_output_basic_block (MonoCompile *cfg, MonoBasicBlock *bb)
        while (ins) {
                offset = code - cfg->native_code;
 
-               max_len = ((guint8 *)ins_spec [ins->opcode])[MONO_INST_LEN];
+               max_len = ((guint8 *)ins_get_spec (ins->opcode))[MONO_INST_LEN];
 
                if (offset > (cfg->code_size - max_len - 16)) {
                        cfg->code_size *= 2;
@@ -2682,11 +2740,7 @@ mono_arch_output_basic_block (MonoCompile *cfg, MonoBasicBlock *bb)
                        }
                }
                        break;
-               case OP_X86_TEST_NULL: {
-                       s390_ltr (code, ins->sreg1, ins->sreg1);
-               }
-                       break;
-               case CEE_BREAK: {
+               case OP_BREAK: {
                        mono_add_patch_info (cfg, offset, MONO_PATCH_INFO_ABS, mono_arch_break);
                         s390_brasl (code, s390_r14, 0);
                }
@@ -2707,28 +2761,22 @@ mono_arch_output_basic_block (MonoCompile *cfg, MonoBasicBlock *bb)
                }
                        break;
                case OP_ADD_IMM: {
+                       if (ins->dreg != ins->sreg1) {
+                               s390_lr   (code, ins->dreg, ins->sreg1);
+                       }
                        if ((ins->next) &&
                            (ins->next->opcode == OP_ADC_IMM)) {
                                s390_basr (code, s390_r13, 0);
                                s390_j    (code, 4);
                                s390_word (code, ins->inst_imm);
-                               if (ins->dreg != ins->sreg1) {
-                                       s390_lr   (code, ins->dreg, ins->sreg1);
-                               }
                                s390_a (code, ins->dreg, 0, s390_r13, 4);
                        } else {
                                if (s390_is_imm16 (ins->inst_imm)) {
-                                       if (ins->dreg != ins->sreg1) {
-                                               s390_lr   (code, ins->dreg, ins->sreg1);
-                                       }
                                        s390_ahi  (code, ins->dreg, ins->inst_imm);
                                } else {
                                        s390_basr (code, s390_r13, 0);
                                        s390_j    (code, 4);
                                        s390_word (code, ins->inst_imm);
-                                       if (ins->dreg != ins->sreg1) {
-                                               s390_lr   (code, ins->dreg, ins->sreg1);
-                                       }
                                        s390_a (code, ins->dreg, 0, s390_r13, 4);
                                }
                        }
@@ -2791,23 +2839,34 @@ mono_arch_output_basic_block (MonoCompile *cfg, MonoBasicBlock *bb)
                        EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
                }
                        break;
+               case OP_LADD: {
+                       s390_alr  (code, s390_r0, ins->sreg1);
+                       s390_jnc  (code, 4);
+                       s390_ahi  (code, s390_r1, 1);
+                       s390_ar   (code, s390_r1, ins->sreg2);
+                       s390_lr   (code, ins->dreg, s390_r0);
+                       s390_lr   (code, ins->dreg+1, s390_r1);
+               }
+                       break;
                case OP_LADD_OVF: {
                        short int *o[1];
-                       CHECK_SRCDST_COM;
-                       s390_alr  (code, ins->dreg, src2);
+                       s390_alr  (code, s390_r0, ins->sreg1);
                        s390_jnc  (code, 0); CODEPTR(code, o[0]);
-                       s390_ahi  (code, ins->dreg+1, 1);
+                       s390_ahi  (code, s390_r1, 1);
                        EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
                        PTRSLOT   (code, o[0]);
-                       s390_ar   (code, ins->dreg+1, src2+1);
+                       s390_ar   (code, s390_r1, ins->sreg2);
                        EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
+                       s390_lr   (code, ins->dreg, s390_r0);
+                       s390_lr   (code, ins->dreg+1, s390_r1);
                }
                        break;
                case OP_LADD_OVF_UN: {
-                       CHECK_SRCDST_COM;
-                       s390_alr  (code, ins->dreg, src2);
-                       s390_alcr (code, ins->dreg+1, src2+1);
+                       s390_alr  (code, s390_r0, ins->sreg1);
+                       s390_alcr (code, s390_r1, ins->sreg2);
                        EMIT_COND_SYSTEM_EXCEPTION (S390_CC_CY, "OverflowException");
+                       s390_lr   (code, ins->dreg, s390_r0);
+                       s390_lr   (code, ins->dreg+1, s390_r1);
                }
                        break;
                case OP_ADD_OVF_CARRY: {
@@ -2904,24 +2963,36 @@ mono_arch_output_basic_block (MonoCompile *cfg, MonoBasicBlock *bb)
                        EMIT_COND_SYSTEM_EXCEPTION (S390_CC_NC, "OverflowException");
                }
                        break;
+               case OP_LSUB: {
+                       s390_lr   (code, s390_r14, ins->sreg2);
+                       s390_slr  (code, s390_r0, ins->sreg1);
+                       s390_jnl  (code, 4);
+                       s390_ahi  (code, s390_r14, 1);
+                       s390_sr   (code, s390_r1, s390_r14);
+                       s390_lr   (code, ins->dreg, s390_r0);
+                       s390_lr   (code, ins->dreg+1, s390_r1);
+               }
+                       break;
                case OP_LSUB_OVF: {
-                       short int *o[3];
-                       CHECK_SRCDST_COM;
-                       s390_lr   (code, s390_r1, src2+1);
-                       s390_slr  (code, ins->dreg, src2);
+                       short int *o[1];
+                       s390_lr   (code, s390_r14, ins->sreg2);
+                       s390_slr  (code, s390_r0, ins->sreg1);
                        s390_jnl  (code, 0); CODEPTR(code, o[0]);
-                       s390_ahi  (code, s390_r1, 1);
+                       s390_ahi  (code, s390_r14, 1);
                        EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
                        PTRSLOT   (code, o[0]);
-                       s390_sr   (code, ins->dreg+1, s390_r1);
+                       s390_sr   (code, s390_r1, s390_r14);
                        EMIT_COND_SYSTEM_EXCEPTION (S390_CC_OV, "OverflowException");
+                       s390_lr   (code, ins->dreg, s390_r0);
+                       s390_lr   (code, ins->dreg+1, s390_r1);
                }
                        break;
                case OP_LSUB_OVF_UN: {
-                       CHECK_SRCDST_COM;
-                       s390_slr  (code, ins->dreg, src2);
-                       s390_slbr (code, ins->dreg+1, src2+1);
+                       s390_slr  (code, s390_r0, ins->sreg1);
+                       s390_slbr (code, s390_r1, ins->sreg2);
                        EMIT_COND_SYSTEM_EXCEPTION (S390_CC_LT, "OverflowException");
+                       s390_lr   (code, ins->dreg, s390_r0);
+                       s390_lr   (code, ins->dreg+1, s390_r1);
                }
                        break;
                case OP_SUB_OVF_CARRY: {
@@ -3290,13 +3361,14 @@ mono_arch_output_basic_block (MonoCompile *cfg, MonoBasicBlock *bb)
                }
                        break;
                case OP_FCONV_TO_R4: {
+                       NOT_IMPLEMENTED("OP_FCONV_TO_R4");
                        if ((ins->next) &&
                             (ins->next->opcode != OP_FMOVE) &&
                             (ins->next->opcode != OP_STORER4_MEMBASE_REG))
                                s390_ledbr (code, ins->dreg, ins->sreg1);
                }
                        break;
-               case CEE_JMP: {
+               case OP_JMP: {
                        if (cfg->method->save_lmf)
                                restoreLMF(code, cfg->frame_reg, cfg->stack_usage);
 
@@ -3407,6 +3479,26 @@ mono_arch_output_basic_block (MonoCompile *cfg, MonoBasicBlock *bb)
                        s390_ahi  (code, s390_r1, 14);
                        s390_srl  (code, s390_r1, 0, 3);
                        s390_sll  (code, s390_r1, 0, 3);
+                       if (cfg->method->save_lmf) {
+                               /*----------------------------------*/
+                               /* we have to adjust lmf ebp value  */ 
+                               /*----------------------------------*/
+                               int lmfOffset = cfg->stack_usage - sizeof(MonoLMF);     
+                                                                                       
+                               s390_lr (code, s390_r13, cfg->frame_reg);
+                               if (s390_is_uimm16(lmfOffset))
+                                       s390_ahi   (code, s390_r13, lmfOffset); 
+                               else {
+                                       s390_basr (code, s390_r14, 0);
+                                       s390_j    (code, 4);
+                                       s390_word (code, lmfOffset);
+                                       s390_a    (code, s390_r13, 0, s390_r14, 4);
+                               }
+                               s390_lr (code, s390_r14, STK_BASE);
+                               s390_sr (code, s390_r14, s390_r1);
+                               s390_st (code, s390_r14, 0, s390_r13, 
+                                        G_STRUCT_OFFSET(MonoLMF, ebp));        
+                       }
                        s390_l    (code, s390_r13, 0, STK_BASE, 0);
                        s390_sr   (code, STK_BASE, s390_r1);
                        s390_st   (code, s390_r13, 0, STK_BASE, 0);
@@ -3428,7 +3520,7 @@ mono_arch_output_basic_block (MonoCompile *cfg, MonoBasicBlock *bb)
                        s390_br  (code, s390_r14);
                }
                        break;
-               case CEE_THROW: {
+               case OP_THROW: {
                        s390_lr (code, s390_r2, ins->sreg1);
                        mono_add_patch_info (cfg, code-cfg->native_code, MONO_PATCH_INFO_INTERNAL_METHOD, 
                                             (gpointer)"mono_arch_throw_exception");
@@ -3474,7 +3566,7 @@ mono_arch_output_basic_block (MonoCompile *cfg, MonoBasicBlock *bb)
                        s390_br  (code, s390_r14);
                }
                        break;
-               case CEE_ENDFINALLY: {
+               case OP_ENDFINALLY: {
                        if (s390_is_uimm12 (ins->inst_left->inst_offset)) {
                                s390_l  (code, s390_r14, 0, ins->inst_left->inst_basereg,
                                         ins->inst_left->inst_offset);
@@ -3499,7 +3591,7 @@ mono_arch_output_basic_block (MonoCompile *cfg, MonoBasicBlock *bb)
                        ins->inst_c0 = code - cfg->native_code;
                }
                        break;
-               case CEE_BR: 
+               case OP_BR: 
                        EMIT_UNCOND_BRANCH(ins);
                        break;
                case OP_BR_REG: {
@@ -3813,37 +3905,57 @@ mono_arch_output_basic_block (MonoCompile *cfg, MonoBasicBlock *bb)
                        s390_lhi   (code, ins->dreg, 0);
                }
                        break;
-               case OP_FBEQ:
-                       EMIT_COND_BRANCH (ins, S390_CC_EQ|S390_CC_OV);
+               case OP_FBEQ: {
+                       short *o;
+                       s390_jo (code, 0); CODEPTR(code, o);
+                       EMIT_COND_BRANCH (ins, S390_CC_EQ);
+                       PTRSLOT(code, o);
+               }
                        break;
                case OP_FBNE_UN:
                        EMIT_COND_BRANCH (ins, S390_CC_NE|S390_CC_OV);
                        break;
-               case OP_FBLT:
+               case OP_FBLT: {
+                       short *o;
+                       s390_jo (code, 0); CODEPTR(code, o);
                        EMIT_COND_BRANCH (ins, S390_CC_LT);
+                       PTRSLOT(code, o);
+               }
                        break;
                case OP_FBLT_UN:
                        EMIT_COND_BRANCH (ins, S390_CC_LT|S390_CC_OV);
                        break;
-               case OP_FBGT:
+               case OP_FBGT: {
+                       short *o;
+                       s390_jo (code, 0); CODEPTR(code, o);
                        EMIT_COND_BRANCH (ins, S390_CC_GT);
+                       PTRSLOT(code, o);
+               }
                        break;
                case OP_FBGT_UN:
                        EMIT_COND_BRANCH (ins, S390_CC_GT|S390_CC_OV);
                        break;
-               case OP_FBGE:
+               case OP_FBGE: {
+                       short *o;
+                       s390_jo (code, 0); CODEPTR(code, o);
                        EMIT_COND_BRANCH (ins, S390_CC_GE);
+                       PTRSLOT(code, o);
+               }
                        break;
                case OP_FBGE_UN:
                        EMIT_COND_BRANCH (ins, S390_CC_GE|S390_CC_OV);
                        break;
-               case OP_FBLE:
+               case OP_FBLE: {
+                       short *o;
+                       s390_jo (code, 0); CODEPTR(code, o);
                        EMIT_COND_BRANCH (ins, S390_CC_LE);
+                       PTRSLOT(code, o);
+               }
                        break;
                case OP_FBLE_UN:
                        EMIT_COND_BRANCH (ins, S390_CC_LE|S390_CC_OV);
                        break;
-               case CEE_CKFINITE: {
+               case OP_CKFINITE: {
                        short *o;
                        s390_lhi  (code, s390_r13, 0x7f);
                        s390_tcdb (code, ins->sreg1, 0, s390_r13, 0);
@@ -3855,9 +3967,9 @@ mono_arch_output_basic_block (MonoCompile *cfg, MonoBasicBlock *bb)
                }
                        break;
                case OP_S390_MOVE: {
-                       if (ins->unused > 0) {
-                               if (ins->unused <= 256) {
-                                       s390_mvc  (code, ins->unused, ins->dreg, 
+                       if (ins->backend.size > 0) {
+                               if (ins->backend.size <= 256) {
+                                       s390_mvc  (code, ins->backend.size, ins->dreg, 
                                                   ins->inst_offset, ins->sreg1, ins->inst_imm);
                                } else {
                                        s390_lr   (code, s390_r0, ins->dreg);
@@ -3911,6 +4023,20 @@ mono_arch_output_basic_block (MonoCompile *cfg, MonoBasicBlock *bb)
                        s390_cs  (code, s390_r0, ins->sreg2, ins->inst_basereg, ins->inst_offset);
                        s390_jnz (code, -4);
                        s390_lr  (code, ins->dreg, s390_r0);
+               }
+                       break;  
+               case OP_S390_BKCHAIN: {
+                       s390_lr  (code, ins->dreg, ins->sreg1);
+                       if (s390_is_imm16 (cfg->stack_offset)) {
+                               s390_ahi (code, ins->dreg, cfg->stack_offset);
+                       } else {
+                               s390_basr (code, s390_r13, 0);
+                               s390_j    (code, 6);
+                               s390_word (code, cfg->stack_offset);
+                               s390_a    (code, ins->dreg, 0, s390_r13, 4);
+                       }
+               }
+               case OP_MEMORY_BARRIER: {
                }
                        break;  
                default:
@@ -4069,7 +4195,7 @@ emit_load_volatile_registers(guint8 * code, MonoCompile *cfg)
 
        for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
                ArgInfo *ainfo = cinfo->args + i;
-               inst = cfg->varinfo [pos];
+               inst = cfg->args [pos];
                
                if (inst->opcode == OP_REGVAR) {
                        if (ainfo->regtype == RegTypeGeneral)
@@ -4213,7 +4339,7 @@ mono_arch_emit_prolog (MonoCompile *cfg)
                        max_offset += 6; 
 
                while (ins) {
-                       max_offset += ((guint8 *)ins_spec [ins->opcode])[MONO_INST_LEN];
+                       max_offset += ((guint8 *)ins_get_spec (ins->opcode))[MONO_INST_LEN];
                        ins = ins->next;
                }
        }
@@ -4227,13 +4353,13 @@ mono_arch_emit_prolog (MonoCompile *cfg)
        if (cinfo->struct_ret) {
                ArgInfo *ainfo = &cinfo->ret;
                inst         = cfg->ret;
-               inst->unused = ainfo->vtsize;
+               inst->backend.size = ainfo->vtsize;
                s390_st (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
        }
 
        for (i = 0; i < sig->param_count + sig->hasthis; ++i) {
                ArgInfo *ainfo = cinfo->args + i;
-               inst = cfg->varinfo [pos];
+               inst = cfg->args [pos];
                
                if (inst->opcode == OP_REGVAR) {
                        if (ainfo->regtype == RegTypeGeneral)
@@ -4316,7 +4442,8 @@ mono_arch_emit_prolog (MonoCompile *cfg)
                                                break;
                                }
                        } else if (ainfo->regtype == RegTypeStructByAddr) {
-                               s390_st  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
+                               if (ainfo->reg != STK_BASE) 
+                                       s390_st  (code, ainfo->reg, 0, inst->inst_basereg, inst->inst_offset);
                        } else
                                g_assert_not_reached ();
                }
@@ -4330,7 +4457,14 @@ mono_arch_emit_prolog (MonoCompile *cfg)
                lmfOffset = alloc_size - sizeof(MonoLMF);       
                                                                                        
                s390_lr    (code, s390_r13, cfg->frame_reg);            
-               s390_ahi   (code, s390_r13, lmfOffset);                                 
+               if (s390_is_uimm16(lmfOffset))
+                       s390_ahi   (code, s390_r13, lmfOffset); 
+               else {
+                       s390_basr (code, s390_r14, 0);
+                       s390_j    (code, 4);
+                       s390_word (code, lmfOffset);
+                       s390_a    (code, s390_r13, 0, s390_r14, 4);
+               }
                                                                                        
                /*---------------------------------------------------------------*/
                /* Preserve the parameter registers while we fix up the lmf      */
@@ -4381,8 +4515,7 @@ mono_arch_emit_prolog (MonoCompile *cfg)
                /*---------------------------------------------------------------*/     
                /* save the current IP                                           */     
                /*---------------------------------------------------------------*/     
-               s390_lr    (code, s390_r1, cfg->frame_reg);
-               s390_st    (code, s390_r1, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, ebp)); 
+               s390_st    (code, STK_BASE, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, ebp));
                s390_basr  (code, s390_r1, 0);
                s390_la    (code, s390_r1, 0, s390_r1, 0);                              
                s390_st    (code, s390_r1, 0, s390_r13, G_STRUCT_OFFSET(MonoLMF, eip)); 
@@ -4490,8 +4623,7 @@ mono_arch_emit_exceptions (MonoCompile *cfg)
                        iExc;
        guint32         code_size;
        MonoClass       *exc_classes [MAX_EXC];
-       guint8          *exc_throw_start [MAX_EXC], 
-                       *exc_throw_end [MAX_EXC];
+       guint8          *exc_throw_start [MAX_EXC];
 
        for (patch_info = cfg->patch_info; 
             patch_info; 
@@ -4592,13 +4724,6 @@ mono_arch_emit_exceptions (MonoCompile *cfg)
 void
 mono_arch_setup_jit_tls_data (MonoJitTlsData *tls)
 {
-#ifdef MONO_ARCH_SIGSEGV_ON_ALTSTACK
-       pthread_t       self = pthread_self();
-       pthread_attr_t  attr;
-       void            *stAddr = NULL;
-       size_t          stSize  = 0;
-       struct sigaltstack sa;
-#endif
 
        if (!tls_offset_inited) {
                tls_offset_inited = TRUE;
@@ -4623,35 +4748,6 @@ mono_arch_setup_jit_tls_data (MonoJitTlsData *tls)
 #endif
        }               
 
-#ifdef MONO_ARCH_SIGSEGV_ON_ALTSTACK
-
-       /*----------------------------------------------------------*/
-       /* Determine stack boundaries                               */
-       /*----------------------------------------------------------*/
-       if (!mono_running_on_valgrind ()) {
-#ifdef HAVE_PTHREAD_GETATTR_NP
-               pthread_getattr_np( self, &attr );
-#elif HAVE_PTHREAD_ATTR_GET_NP
-               pthread_attr_get_np( self, &attr );
-#endif
-               pthread_attr_getstack( &attr, &stAddr, &stSize );
-       }
-
-
-       /*----------------------------------------------------------*/
-       /* Setup an alternate signal stack                          */
-       /*----------------------------------------------------------*/
-       tls->stack_size        = stSize;
-       tls->signal_stack      = mmap (0, SIGNAL_STACK_SIZE, 
-                                      PROT_READ|PROT_WRITE|PROT_EXEC, 
-                                      MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
-       tls->signal_stack_size = SIGNAL_STACK_SIZE;
-
-       sa.ss_sp    = tls->signal_stack;
-       sa.ss_size  = SIGNAL_STACK_SIZE;
-       sa.ss_flags = SS_ONSTACK;
-       sigaltstack (&sa, NULL);
-#endif
        if (!lmf_addr_key_inited) {
                lmf_addr_key_inited = TRUE;
                pthread_key_create (&lmf_addr_key, NULL);
@@ -4673,17 +4769,6 @@ mono_arch_setup_jit_tls_data (MonoJitTlsData *tls)
 void
 mono_arch_free_jit_tls_data (MonoJitTlsData *tls)
 {
-#ifdef MONO_ARCH_SIGSEGV_ON_ALTSTACK
-       struct sigaltstack sa;
-
-       sa.ss_sp    = tls->signal_stack;
-       sa.ss_size  = SIGNAL_STACK_SIZE;
-       sa.ss_flags = SS_DISABLE;
-       sigaltstack (&sa, NULL);
-
-       if (tls->signal_stack)
-               munmap(tls->signal_stack, SIGNAL_STACK_SIZE);
-#endif
 
 }
 
@@ -4713,7 +4798,7 @@ mono_arch_emit_this_vret_args (MonoCompile *cfg, MonoCallInst *inst, int this_re
                this->sreg1 = this_reg;
                this->dreg  = mono_regstate_next_int (cfg->rs);
                mono_bblock_add_inst (cfg->cbb, this);
-               mono_call_inst_add_outarg_reg (inst, this->dreg, this_dreg, FALSE);
+               mono_call_inst_add_outarg_reg (cfg, inst, this->dreg, this_dreg, FALSE);
        }
 
        if (vt_reg != -1) {
@@ -4723,7 +4808,7 @@ mono_arch_emit_this_vret_args (MonoCompile *cfg, MonoCallInst *inst, int this_re
                vtarg->sreg1 = vt_reg;
                vtarg->dreg  = mono_regstate_next_int (cfg->rs);
                mono_bblock_add_inst (cfg->cbb, vtarg);
-               mono_call_inst_add_outarg_reg (inst, vtarg->dreg, s390_r2, FALSE);
+               mono_call_inst_add_outarg_reg (cfg, inst, vtarg->dreg, s390_r2, FALSE);
        }
 }
 
@@ -4749,6 +4834,9 @@ mono_arch_get_inst_for_method (MonoCompile *cfg, MonoMethod *cmethod,
                        MONO_INST_NEW (cfg, ins, OP_SQRT);
                        ins->inst_i0 = args [0];
                }
+       } else if (cmethod->klass == mono_defaults.thread_class &&
+                          strcmp (cmethod->name, "MemoryBarrier") == 0) {
+               MONO_INST_NEW (cfg, ins, OP_MEMORY_BARRIER);
        } else if(cmethod->klass->image == mono_defaults.corlib &&
                           (strcmp (cmethod->klass->name_space, "System.Threading") == 0) &&
                           (strcmp (cmethod->klass->name, "Interlocked") == 0)) {
@@ -4823,15 +4911,15 @@ mono_arch_print_tree (MonoInst *tree, int arity)
                        break;
                case OP_S390_MOVE:
                        printf ("[0x%lx(%d,%s),0x%lx(%s)]",
-                               tree->inst_offset, tree->unused,
+                               tree->inst_offset, tree->backend.size,
                                mono_arch_regname(tree->dreg), tree->inst_imm, 
                                mono_arch_regname(tree->sreg1));
                        done = 1;
                        break;
                case OP_S390_SETF4RET:
-                       printf ("[f%ld,f%ld]", 
-                               mono_arch_regname (tree->dreg),
-                               mono_arch_regname (tree->sreg1));
+                       printf ("[%s,%s]", 
+                               mono_arch_fregname (tree->dreg),
+                               mono_arch_fregname (tree->sreg1));
                        done = 1;
                        break;
                case OP_TLS_GET:
@@ -4839,6 +4927,12 @@ mono_arch_print_tree (MonoInst *tree, int arity)
                                tree->inst_imm,
                                mono_arch_regname (tree->sreg1));
                        done = 1;
+                       break;
+               case OP_S390_BKCHAIN:
+                       printf ("[previous_frame(%s)]", 
+                               mono_arch_regname (tree->sreg1));
+                       done = 1;
+                       break;
                default:
                        done = 0;
        }
@@ -4953,4 +5047,22 @@ mono_arch_get_lmf_addr (void)
 }
 
 
+/*========================= End of Function ========================*/
+
+/*------------------------------------------------------------------*/
+/*                                                                  */
+/* Name                - mono_arch_get_patch_offset                        */
+/*                                                                  */
+/* Function    - Dummy entry point until s390x supports aot.       */
+/*                                                                 */
+/* Returns     - Offset for patch.                                 */
+/*                                                                  */
+/*------------------------------------------------------------------*/
+
+guint32
+mono_arch_get_patch_offset (guint8 *code)
+{
+       return 0;
+}
+
 /*========================= End of Function ========================*/