1 /*------------------------------------------------------------------*/
3 /* Name - exceptions-s390.c */
5 /* Function - Exception support for S/390. */
7 /* Name - Neale Ferguson (Neale.Ferguson@SoftwareAG-usa.com) */
9 /* Date - January, 2004 */
11 /* Derivation - From exceptions-x86 & exceptions-ppc */
12 /* Paolo Molaro (lupus@ximian.com) */
13 /* Dietmar Maurer (dietmar@ximian.com) */
15 /* Copyright - 2001 Ximian, Inc. */
17 /*------------------------------------------------------------------*/
19 /*------------------------------------------------------------------*/
21 /*------------------------------------------------------------------*/
23 #define S390_CALLFILTER_INTREGS S390_MINIMAL_STACK_SIZE
24 #define S390_CALLFILTER_FLTREGS (S390_CALLFILTER_INTREGS+(16*sizeof(gulong)))
25 #define S390_CALLFILTER_ACCREGS (S390_CALLFILTER_FLTREGS+(16*sizeof(gdouble)))
26 #define S390_CALLFILTER_SIZE (S390_CALLFILTER_ACCREGS+(16*sizeof(gint32)))
28 #define S390_THROWSTACK_ACCPRM S390_MINIMAL_STACK_SIZE
29 #define S390_THROWSTACK_FPCPRM (S390_THROWSTACK_ACCPRM+sizeof(gpointer))
30 #define S390_THROWSTACK_RETHROW (S390_THROWSTACK_FPCPRM+sizeof(gulong))
31 #define S390_THROWSTACK_INTREGS (S390_THROWSTACK_RETHROW+sizeof(gboolean))
32 #define S390_THROWSTACK_FLTREGS (S390_THROWSTACK_INTREGS+(16*sizeof(gulong)))
33 #define S390_THROWSTACK_ACCREGS (S390_THROWSTACK_FLTREGS+(16*sizeof(gdouble)))
34 #define S390_THROWSTACK_SIZE (S390_THROWSTACK_ACCREGS+(16*sizeof(gint32)))
36 #define S390_REG_SAVE_R13 (S390_REG_SAVE_OFFSET+(7*sizeof(gulong)))
40 #define setup_context(ctx)
42 /*========================= End of Defines =========================*/
44 /*------------------------------------------------------------------*/
46 /*------------------------------------------------------------------*/
54 #include <mono/arch/s390x/s390x-codegen.h>
55 #include <mono/metadata/appdomain.h>
56 #include <mono/metadata/tabledefs.h>
57 #include <mono/metadata/threads.h>
58 #include <mono/metadata/debug-helpers.h>
59 #include <mono/metadata/exception.h>
60 #include <mono/metadata/mono-debug.h>
63 #include "mini-s390x.h"
65 /*========================= End of Includes ========================*/
67 /*------------------------------------------------------------------*/
68 /* P r o t o t y p e s */
69 /*------------------------------------------------------------------*/
71 gboolean mono_arch_handle_exception (void *ctx,
74 /*========================= End of Prototypes ======================*/
76 /*------------------------------------------------------------------*/
77 /* G l o b a l V a r i a b l e s */
78 /*------------------------------------------------------------------*/
85 /*====================== End of Global Variables ===================*/
87 /*------------------------------------------------------------------*/
89 /* Name - mono_arch_get_call_filter */
91 /* Function - Return a pointer to a method which calls an */
92 /* exception filter. We also use this function to */
93 /* call finally handlers (we pass NULL as @exc */
94 /* object in this case). */
96 /*------------------------------------------------------------------*/
99 mono_arch_get_call_filter (MonoTrampInfo **info, gboolean aot)
101 static guint8 *start;
102 static int inited = 0;
104 int alloc_size, pos, i;
105 GSList *unwind_ops = NULL;
106 MonoJumpInfo *ji = NULL;
114 /* call_filter (MonoContext *ctx, unsigned long eip, gpointer exc) */
115 code = start = mono_global_codeman_reserve (512);
117 s390_stmg (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
118 s390_lgr (code, s390_r14, STK_BASE);
119 alloc_size = S390_ALIGN(S390_CALLFILTER_SIZE, S390_STACK_ALIGNMENT);
120 s390_aghi (code, STK_BASE, -alloc_size);
121 s390_stg (code, s390_r14, 0, STK_BASE, 0);
123 /*------------------------------------------------------*/
124 /* save general registers on stack */
125 /*------------------------------------------------------*/
126 s390_stmg (code, s390_r0, STK_BASE, STK_BASE, S390_CALLFILTER_INTREGS);
128 /*------------------------------------------------------*/
129 /* save floating point registers on stack */
130 /*------------------------------------------------------*/
131 pos = S390_CALLFILTER_FLTREGS;
132 for (i = 0; i < 16; ++i) {
133 s390_std (code, i, 0, STK_BASE, pos);
134 pos += sizeof (gdouble);
137 /*------------------------------------------------------*/
138 /* save access registers on stack */
139 /*------------------------------------------------------*/
140 s390_stam (code, s390_a0, s390_a15, STK_BASE, S390_CALLFILTER_ACCREGS);
142 /*------------------------------------------------------*/
144 /*------------------------------------------------------*/
145 s390_lgr (code, s390_r13, s390_r2);
147 /*------------------------------------------------------*/
148 /* Get A(Handler Entry Point) */
149 /*------------------------------------------------------*/
150 s390_lgr (code, s390_r0, s390_r3);
152 /*------------------------------------------------------*/
153 /* Set parameter register with Exception */
154 /*------------------------------------------------------*/
155 s390_lgr (code, s390_r2, s390_r4);
157 /*------------------------------------------------------*/
158 /* Load all registers with values from the context */
159 /*------------------------------------------------------*/
160 s390_lmg (code, s390_r3, s390_r12, s390_r13,
161 G_STRUCT_OFFSET(MonoContext, uc_mcontext.gregs[3]));
162 pos = G_STRUCT_OFFSET(MonoContext, uc_mcontext.fpregs.fprs[0]);
163 for (i = 0; i < 16; ++i) {
164 s390_ld (code, i, 0, s390_r13, pos);
165 pos += sizeof(gdouble);
169 /*------------------------------------------------------*/
170 /* We need to preserve current SP before calling filter */
171 /* with SP from the context */
172 /*------------------------------------------------------*/
173 s390_lgr (code, s390_r14, STK_BASE);
174 s390_lg (code, STK_BASE, 0, s390_r13,
175 G_STRUCT_OFFSET(MonoContext, uc_mcontext.gregs[15]));
176 s390_lgr (code, s390_r13, s390_r14);
179 /*------------------------------------------------------*/
181 /*------------------------------------------------------*/
182 s390_lgr (code, s390_r1, s390_r0);
183 s390_basr (code, s390_r14, s390_r1);
185 /*------------------------------------------------------*/
186 /* Save return value */
187 /*------------------------------------------------------*/
188 s390_lgr (code, s390_r14, s390_r2);
191 /*------------------------------------------------------*/
192 /* Reload our stack register with value saved in context*/
193 /*------------------------------------------------------*/
194 s390_lgr (code, STK_BASE, s390_r13);
197 /*------------------------------------------------------*/
198 /* Restore all the regs from the stack */
199 /*------------------------------------------------------*/
200 s390_lmg (code, s390_r0, s390_r13, STK_BASE, S390_CALLFILTER_INTREGS);
201 pos = S390_CALLFILTER_FLTREGS;
202 for (i = 0; i < 16; ++i) {
203 s390_ld (code, i, 0, STK_BASE, pos);
204 pos += sizeof (gdouble);
207 s390_lgr (code, s390_r2, s390_r14);
208 s390_lam (code, s390_a0, s390_a15, STK_BASE, S390_CALLFILTER_ACCREGS);
209 s390_aghi (code, s390_r15, alloc_size);
210 s390_lmg (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
211 s390_br (code, s390_r14);
213 g_assert ((code - start) < SZ_THROW);
216 *info = mono_tramp_info_create ("call_filter",
217 start, code - start, ji,
223 /*========================= End of Function ========================*/
225 /*------------------------------------------------------------------*/
227 /* Name - throw_exception. */
229 /* Function - Raise an exception based on the parameters passed.*/
231 /*------------------------------------------------------------------*/
234 throw_exception (MonoObject *exc, unsigned long ip, unsigned long sp,
235 gulong *int_regs, gdouble *fp_regs, gint32 *acc_regs,
236 guint fpc, gboolean rethrow)
241 memset(&ctx, 0, sizeof(ctx));
245 /* adjust eip so that it point into the call instruction */
248 for (iReg = 0; iReg < 16; iReg++) {
249 ctx.uc_mcontext.gregs[iReg] = int_regs[iReg];
250 ctx.uc_mcontext.fpregs.fprs[iReg].d = fp_regs[iReg];
251 ctx.uc_mcontext.aregs[iReg] = acc_regs[iReg];
254 ctx.uc_mcontext.fpregs.fpc = fpc;
256 MONO_CONTEXT_SET_BP (&ctx, sp);
257 MONO_CONTEXT_SET_IP (&ctx, ip);
259 if (mono_object_isinst (exc, mono_defaults.exception_class)) {
260 MonoException *mono_ex = (MonoException*)exc;
262 mono_ex->stack_trace = NULL;
264 // mono_arch_handle_exception (&ctx, exc, FALSE);
265 mono_handle_exception (&ctx, exc);
266 mono_restore_context(&ctx);
268 g_assert_not_reached ();
271 /*========================= End of Function ========================*/
273 /*------------------------------------------------------------------*/
275 /* Name - get_throw_exception_generic */
277 /* Function - Return a function pointer which can be used to */
278 /* raise exceptions. The returned function has the */
279 /* following signature: */
280 /* void (*func) (MonoException *exc); or, */
281 /* void (*func) (char *exc_name); */
283 /*------------------------------------------------------------------*/
286 mono_arch_get_throw_exception_generic (int size, MonoTrampInfo **info,
287 int corlib, gboolean rethrow, gboolean aot)
289 guint8 *code, *start;
290 int alloc_size, pos, i;
291 MonoJumpInfo *ji = NULL;
292 GSList *unwind_ops = NULL;
294 code = start = mono_global_codeman_reserve(size);
296 s390_stmg (code, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET);
297 alloc_size = S390_ALIGN(S390_THROWSTACK_SIZE, S390_STACK_ALIGNMENT);
298 s390_lgr (code, s390_r14, STK_BASE);
299 s390_aghi (code, STK_BASE, -alloc_size);
300 s390_stg (code, s390_r14, 0, STK_BASE, 0);
301 s390_lgr (code, s390_r3, s390_r2);
303 s390_basr (code, s390_r13, 0);
305 s390_llong(code, mono_defaults.exception_class->image);
306 s390_llong(code, mono_exception_from_token);
307 s390_lg (code, s390_r2, 0, s390_r13, 4);
308 s390_lg (code, s390_r1, 0, s390_r13, 12);
309 s390_basr (code, s390_r14, s390_r1);
312 /*------------------------------------------------------*/
313 /* save the general registers on the stack */
314 /*------------------------------------------------------*/
315 s390_stmg (code, s390_r0, s390_r13, STK_BASE, S390_THROWSTACK_INTREGS);
317 s390_lgr (code, s390_r1, STK_BASE);
318 s390_aghi (code, s390_r1, alloc_size);
319 /*------------------------------------------------------*/
320 /* save the return address in the parameter register */
321 /*------------------------------------------------------*/
322 s390_lg (code, s390_r3, 0, s390_r1, S390_RET_ADDR_OFFSET);
324 /*------------------------------------------------------*/
325 /* save the floating point registers */
326 /*------------------------------------------------------*/
327 pos = S390_THROWSTACK_FLTREGS;
328 for (i = 0; i < 16; ++i) {
329 s390_std (code, i, 0, STK_BASE, pos);
330 pos += sizeof (gdouble);
332 /*------------------------------------------------------*/
333 /* save the access registers */
334 /*------------------------------------------------------*/
335 s390_stam (code, s390_r0, s390_r15, STK_BASE, S390_THROWSTACK_ACCREGS);
337 /*------------------------------------------------------*/
338 /* call throw_exception (tkn, ip, sp, gr, fr, ar, re) */
339 /* - r2 already contains *exc */
340 /*------------------------------------------------------*/
341 s390_lgr (code, s390_r4, s390_r1); /* caller sp */
343 /*------------------------------------------------------*/
344 /* pointer to the saved int regs */
345 /*------------------------------------------------------*/
346 s390_la (code, s390_r5, 0, STK_BASE, S390_THROWSTACK_INTREGS);
347 s390_la (code, s390_r6, 0, STK_BASE, S390_THROWSTACK_FLTREGS);
348 s390_la (code, s390_r7, 0, STK_BASE, S390_THROWSTACK_ACCREGS);
349 s390_stg (code, s390_r7, 0, STK_BASE, S390_THROWSTACK_ACCPRM);
350 s390_stfpc(code, STK_BASE, S390_THROWSTACK_FPCPRM+4);
351 s390_lghi (code, s390_r7, rethrow);
352 s390_stg (code, s390_r7, 0, STK_BASE, S390_THROWSTACK_RETHROW);
353 s390_basr (code, s390_r13, 0);
355 s390_llong(code, throw_exception);
356 s390_lg (code, s390_r1, 0, s390_r13, 4);
357 s390_basr (code, s390_r14, s390_r1);
358 /* we should never reach this breakpoint */
360 g_assert ((code - start) < size);
363 *info = mono_tramp_info_create (corlib ? "throw_corlib_exception"
364 : (rethrow ? "rethrow_exception"
365 : "throw_exception"),
366 start, code - start, ji, unwind_ops);
371 /*========================= End of Function ========================*/
373 /*------------------------------------------------------------------*/
375 /* Name - arch_get_throw_exception */
377 /* Function - Return a function pointer which can be used to */
378 /* raise exceptions. The returned function has the */
379 /* following signature: */
380 /* void (*func) (MonoException *exc); */
382 /*------------------------------------------------------------------*/
385 mono_arch_get_throw_exception (MonoTrampInfo **info, gboolean aot)
392 return (mono_arch_get_throw_exception_generic (SZ_THROW, info, FALSE, FALSE, aot));
395 /*========================= End of Function ========================*/
397 /*------------------------------------------------------------------*/
399 /* Name - arch_get_rethrow_exception */
401 /* Function - Return a function pointer which can be used to */
402 /* raise exceptions. The returned function has the */
403 /* following signature: */
404 /* void (*func) (MonoException *exc); */
406 /*------------------------------------------------------------------*/
409 mono_arch_get_rethrow_exception (MonoTrampInfo **info, gboolean aot)
415 return (mono_arch_get_throw_exception_generic (SZ_THROW, info, FALSE, FALSE, aot));
418 /*========================= End of Function ========================*/
420 /*------------------------------------------------------------------*/
422 /* Name - arch_get_corlib_exception */
424 /* Function - Return a function pointer which can be used to */
425 /* raise corlib exceptions. The return function has */
426 /* the following signature: */
427 /* void (*func) (guint32 token, guint32 offset) */
429 /*------------------------------------------------------------------*/
432 mono_arch_get_throw_corlib_exception (MonoTrampInfo **info, gboolean aot)
438 return (mono_arch_get_throw_exception_generic (SZ_THROW, info, TRUE, FALSE, aot));
441 /*========================= End of Function ========================*/
443 /*------------------------------------------------------------------*/
445 /* Name - mono_arch_find_jit_info */
447 /* Function - See exceptions-amd64.c for docs. */
449 /*------------------------------------------------------------------*/
452 mono_arch_find_jit_info (MonoDomain *domain, MonoJitTlsData *jit_tls,
453 MonoJitInfo *ji, MonoContext *ctx,
454 MonoContext *new_ctx, MonoLMF **lmf,
455 mgreg_t **save_locations,
456 StackFrameInfo *frame)
458 gpointer ip = (gpointer) MONO_CONTEXT_GET_IP (ctx);
459 MonoS390StackFrame *sframe;
461 memset (frame, 0, sizeof (StackFrameInfo));
469 guint32 unwind_info_len;
473 frame->type = FRAME_TYPE_MANAGED;
476 unwind_info = mono_aot_get_unwind_info(ji, &unwind_info_len);
478 unwind_info = mono_get_cached_unwind_info(ji->used_regs, &unwind_info_len);
480 if (*lmf && ((*lmf) != jit_tls->first_lmf) &&
481 (MONO_CONTEXT_GET_SP (ctx) >= (gpointer)(*lmf)->ebp)) {
482 /* remove any unused lmf */
483 *lmf = (*lmf)->previous_lmf;
486 address = (char *)ip - (char *)ji->code_start;
488 memcpy(®s, &ctx->uc_mcontext.gregs, sizeof(regs));
489 mono_unwind_frame (unwind_info, unwind_info_len, ji->code_start,
490 (guint8 *) ji->code_start + ji->code_size,
491 ip, regs, 16, save_locations,
492 MONO_MAX_IREGS, &cfa);
493 memcpy (&new_ctx->uc_mcontext.gregs, ®s, sizeof(regs));
494 MONO_CONTEXT_SET_IP(new_ctx, regs[14] - 2);
495 MONO_CONTEXT_SET_BP(new_ctx, cfa);
497 if (*lmf && (MONO_CONTEXT_GET_SP (ctx) >= (gpointer)(*lmf)->ebp)) {
498 /* remove any unused lmf */
499 *lmf = (*lmf)->previous_lmf;
504 ji = mini_jit_info_table_find (domain, (gpointer)(*lmf)->eip, NULL);
509 frame->method = (*lmf)->method;
513 frame->type = FRAME_TYPE_MANAGED_TO_NATIVE;
515 memcpy(new_ctx->uc_mcontext.gregs, (*lmf)->gregs, sizeof((*lmf)->gregs));
516 memcpy(new_ctx->uc_mcontext.fpregs.fprs, (*lmf)->fregs, sizeof((*lmf)->fregs));
517 MONO_CONTEXT_SET_BP (new_ctx, (*lmf)->ebp);
518 MONO_CONTEXT_SET_IP (new_ctx, (*lmf)->eip - 2);
519 *lmf = (*lmf)->previous_lmf;
527 /*========================= End of Function ========================*/
529 /*------------------------------------------------------------------*/
531 /* Name - mono_arch_handle_exception */
533 /* Function - Handle an exception raised by the JIT code. */
535 /* Parameters - ctx - Saved processor state */
536 /* obj - The exception object */
538 /*------------------------------------------------------------------*/
541 mono_arch_handle_exception (void *uc, gpointer obj)
543 return mono_handle_exception (uc, obj);
546 /*========================= End of Function ========================*/
548 /*------------------------------------------------------------------*/
550 /* Name - mono_arch_sigctx_to_monoctx. */
552 /* Function - Called from the signal handler to convert signal */
553 /* context to MonoContext. */
555 /*------------------------------------------------------------------*/
558 mono_arch_sigctx_to_monoctx (void *ctx, MonoContext *mctx)
560 mono_sigctx_to_monoctx(ctx, mctx);
563 /*========================= End of Function ========================*/
565 /*------------------------------------------------------------------*/
567 /* Name - mono_arch_monoctx_to_sigctx. */
569 /* Function - Convert MonoContext structure to signal context. */
571 /*------------------------------------------------------------------*/
574 mono_arch_monoctx_to_sigctx (MonoContext *mctx, void *ctx)
576 mono_monoctx_to_sigctx(mctx, ctx);
579 /*========================= End of Function ========================*/
581 /*------------------------------------------------------------------*/
583 /* Name - mono_arch_ip_from_context */
585 /* Function - Return the instruction pointer from the context. */
587 /* Parameters - sigctx - Saved processor state */
589 /*------------------------------------------------------------------*/
592 mono_arch_ip_from_context (void *sigctx)
594 return ((gpointer) MONO_CONTEXT_GET_IP(((MonoContext *) sigctx)));
598 /*========================= End of Function ========================*/
600 /*------------------------------------------------------------------*/
602 /* Name - mono_arch_get_restore_context */
604 /* Function - Return the address of the routine that will rest- */
605 /* ore the context. */
607 /*------------------------------------------------------------------*/
610 mono_arch_get_restore_context (MonoTrampInfo **info, gboolean aot)
619 /*========================= End of Function ========================*/
621 /*------------------------------------------------------------------*/
623 /* Name - mono_arch_is_int_overflow */
625 /* Function - Inspect the code that raised the SIGFPE signal */
626 /* to see if the DivideByZero or Arithmetic exception*/
627 /* should be raised. */
629 /*------------------------------------------------------------------*/
632 mono_arch_is_int_overflow (void *uc, void *info)
637 gboolean arithExc = TRUE;
642 ctx = (MonoContext *) uc;
643 code = (guint8 *) ((siginfo_t *)info)->si_addr;
644 /*----------------------------------------------------------*/
645 /* Divide operations are the only ones that will give the */
646 /* divide by zero exception so just check for these ops. */
647 /*----------------------------------------------------------*/
649 case 0x1d : /* Divide Register */
650 regNo = code[1] & 0x0f;
651 if (ctx->uc_mcontext.gregs[regNo] == 0)
654 case 0x5d : /* Divide */
655 regNo = (code[2] & 0xf0 >> 8);
656 idxNo = (code[1] & 0x0f);
657 offset = *((guint16 *) code+2) & 0x0fff;
658 operand = (guint64*)(ctx->uc_mcontext.gregs[regNo] + offset);
660 operand += ctx->uc_mcontext.gregs[idxNo];
664 case 0xb9 : /* DL[GR] or DS[GR] */
665 if ((code[1] == 0x97) || (code[1] == 0x87) ||
666 (code[1] == 0x0d) || (code[1] == 0x1d)) {
667 regNo = (code[3] & 0x0f);
668 if (ctx->uc_mcontext.gregs[regNo] == 0)
672 case 0xe3 : /* DL[G] | DS[G] */
673 if ((code[5] == 0x97) || (code[5] == 0x87) ||
674 (code[5] == 0x0d) || (code[5] == 0x1d)) {
675 regNo = (code[2] & 0xf0 >> 8);
676 idxNo = (code[1] & 0x0f);
677 offset = (code[2] & 0x0f << 8) +
678 code[3] + (code[4] << 12);
679 operand = (guint64*)(ctx->uc_mcontext.gregs[regNo] + offset);
681 operand += ctx->uc_mcontext.gregs[idxNo];
689 ctx->uc_mcontext.psw.addr = (guint64)code;
693 /*========================= End of Function ========================*/