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1.1 root 1: /*
2: * Tiny Code Generator for QEMU
3: *
4: * Copyright (c) 2008 Fabrice Bellard
5: *
6: * Permission is hereby granted, free of charge, to any person obtaining a copy
7: * of this software and associated documentation files (the "Software"), to deal
8: * in the Software without restriction, including without limitation the rights
9: * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10: * copies of the Software, and to permit persons to whom the Software is
11: * furnished to do so, subject to the following conditions:
12: *
13: * The above copyright notice and this permission notice shall be included in
14: * all copies or substantial portions of the Software.
15: *
16: * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17: * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18: * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19: * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20: * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21: * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22: * THE SOFTWARE.
23: */
24:
25: /* define it to use liveness analysis (better code) */
26: #define USE_LIVENESS_ANALYSIS
1.1.1.7 root 27: #define USE_TCG_OPTIMIZATIONS
1.1 root 28:
1.1.1.2 root 29: #include "config.h"
30:
1.1.1.8 ! root 31: /* Define to jump the ELF file used to communicate with GDB. */
! 32: #undef DEBUG_JIT
! 33:
1.1.1.4 root 34: #if !defined(CONFIG_DEBUG_TCG) && !defined(NDEBUG)
1.1.1.2 root 35: /* define it to suppress various consistency checks (faster) */
36: #define NDEBUG
37: #endif
38:
1.1 root 39: #include "qemu-common.h"
40: #include "cache-utils.h"
1.1.1.3 root 41: #include "host-utils.h"
1.1.1.4 root 42: #include "qemu-timer.h"
1.1 root 43:
44: /* Note: the long term plan is to reduce the dependancies on the QEMU
45: CPU definitions. Currently they are used for qemu_ld/st
46: instructions */
47: #define NO_CPU_IO_DEFS
48: #include "cpu.h"
49:
50: #include "tcg-op.h"
1.1.1.8 ! root 51:
! 52: #if TCG_TARGET_REG_BITS == 64
! 53: # define ELF_CLASS ELFCLASS64
! 54: #else
! 55: # define ELF_CLASS ELFCLASS32
! 56: #endif
! 57: #ifdef HOST_WORDS_BIGENDIAN
! 58: # define ELF_DATA ELFDATA2MSB
! 59: #else
! 60: # define ELF_DATA ELFDATA2LSB
! 61: #endif
! 62:
1.1 root 63: #include "elf.h"
64:
1.1.1.3 root 65: #if defined(CONFIG_USE_GUEST_BASE) && !defined(TCG_TARGET_HAS_GUEST_BASE)
66: #error GUEST_BASE not supported on this host.
67: #endif
1.1 root 68:
1.1.1.7 root 69: /* Forward declarations for functions declared in tcg-target.c and used here. */
1.1.1.4 root 70: static void tcg_target_init(TCGContext *s);
71: static void tcg_target_qemu_prologue(TCGContext *s);
1.1 root 72: static void patch_reloc(uint8_t *code_ptr, int type,
73: tcg_target_long value, tcg_target_long addend);
74:
1.1.1.8 ! root 75: static void tcg_register_jit_int(void *buf, size_t size,
! 76: void *debug_frame, size_t debug_frame_size)
! 77: __attribute__((unused));
! 78:
1.1.1.7 root 79: /* Forward declarations for functions declared and used in tcg-target.c. */
80: static int target_parse_constraint(TCGArgConstraint *ct, const char **pct_str);
81: static void tcg_out_ld(TCGContext *s, TCGType type, TCGReg ret, TCGReg arg1,
82: tcg_target_long arg2);
83: static void tcg_out_mov(TCGContext *s, TCGType type, TCGReg ret, TCGReg arg);
84: static void tcg_out_movi(TCGContext *s, TCGType type,
85: TCGReg ret, tcg_target_long arg);
86: static void tcg_out_op(TCGContext *s, TCGOpcode opc, const TCGArg *args,
87: const int *const_args);
88: static void tcg_out_st(TCGContext *s, TCGType type, TCGReg arg, TCGReg arg1,
89: tcg_target_long arg2);
90: static int tcg_target_const_match(tcg_target_long val,
91: const TCGArgConstraint *arg_ct);
92: static int tcg_target_get_call_iarg_regs_count(int flags);
93:
94: TCGOpDef tcg_op_defs[] = {
1.1.1.4 root 95: #define DEF(s, oargs, iargs, cargs, flags) { #s, oargs, iargs, cargs, iargs + oargs + cargs, flags },
1.1 root 96: #include "tcg-opc.h"
97: #undef DEF
98: };
1.1.1.7 root 99: const size_t tcg_op_defs_max = ARRAY_SIZE(tcg_op_defs);
1.1 root 100:
101: static TCGRegSet tcg_target_available_regs[2];
102: static TCGRegSet tcg_target_call_clobber_regs;
103:
104: /* XXX: move that inside the context */
105: uint16_t *gen_opc_ptr;
106: TCGArg *gen_opparam_ptr;
107:
108: static inline void tcg_out8(TCGContext *s, uint8_t v)
109: {
110: *s->code_ptr++ = v;
111: }
112:
113: static inline void tcg_out16(TCGContext *s, uint16_t v)
114: {
115: *(uint16_t *)s->code_ptr = v;
116: s->code_ptr += 2;
117: }
118:
119: static inline void tcg_out32(TCGContext *s, uint32_t v)
120: {
121: *(uint32_t *)s->code_ptr = v;
122: s->code_ptr += 4;
123: }
124:
125: /* label relocation processing */
126:
1.1.1.4 root 127: static void tcg_out_reloc(TCGContext *s, uint8_t *code_ptr, int type,
128: int label_index, long addend)
1.1 root 129: {
130: TCGLabel *l;
131: TCGRelocation *r;
132:
133: l = &s->labels[label_index];
134: if (l->has_value) {
135: /* FIXME: This may break relocations on RISC targets that
136: modify instruction fields in place. The caller may not have
137: written the initial value. */
138: patch_reloc(code_ptr, type, l->u.value, addend);
139: } else {
140: /* add a new relocation entry */
141: r = tcg_malloc(sizeof(TCGRelocation));
142: r->type = type;
143: r->ptr = code_ptr;
144: r->addend = addend;
145: r->next = l->u.first_reloc;
146: l->u.first_reloc = r;
147: }
148: }
149:
1.1.1.8 ! root 150: static void tcg_out_label(TCGContext *s, int label_index, void *ptr)
1.1 root 151: {
152: TCGLabel *l;
153: TCGRelocation *r;
1.1.1.8 ! root 154: tcg_target_long value = (tcg_target_long)ptr;
1.1 root 155:
156: l = &s->labels[label_index];
157: if (l->has_value)
158: tcg_abort();
159: r = l->u.first_reloc;
160: while (r != NULL) {
161: patch_reloc(r->ptr, r->type, value, r->addend);
162: r = r->next;
163: }
164: l->has_value = 1;
165: l->u.value = value;
166: }
167:
168: int gen_new_label(void)
169: {
170: TCGContext *s = &tcg_ctx;
171: int idx;
172: TCGLabel *l;
173:
174: if (s->nb_labels >= TCG_MAX_LABELS)
175: tcg_abort();
176: idx = s->nb_labels++;
177: l = &s->labels[idx];
178: l->has_value = 0;
179: l->u.first_reloc = NULL;
180: return idx;
181: }
182:
183: #include "tcg-target.c"
184:
185: /* pool based memory allocation */
186: void *tcg_malloc_internal(TCGContext *s, int size)
187: {
188: TCGPool *p;
189: int pool_size;
190:
191: if (size > TCG_POOL_CHUNK_SIZE) {
192: /* big malloc: insert a new pool (XXX: could optimize) */
1.1.1.7 root 193: p = g_malloc(sizeof(TCGPool) + size);
1.1 root 194: p->size = size;
1.1.1.8 ! root 195: p->next = s->pool_first_large;
! 196: s->pool_first_large = p;
! 197: return p->data;
1.1 root 198: } else {
199: p = s->pool_current;
200: if (!p) {
201: p = s->pool_first;
202: if (!p)
203: goto new_pool;
204: } else {
205: if (!p->next) {
206: new_pool:
207: pool_size = TCG_POOL_CHUNK_SIZE;
1.1.1.7 root 208: p = g_malloc(sizeof(TCGPool) + pool_size);
1.1 root 209: p->size = pool_size;
210: p->next = NULL;
211: if (s->pool_current)
212: s->pool_current->next = p;
213: else
214: s->pool_first = p;
215: } else {
216: p = p->next;
217: }
218: }
219: }
220: s->pool_current = p;
221: s->pool_cur = p->data + size;
222: s->pool_end = p->data + p->size;
223: return p->data;
224: }
225:
226: void tcg_pool_reset(TCGContext *s)
227: {
1.1.1.8 ! root 228: TCGPool *p, *t;
! 229: for (p = s->pool_first_large; p; p = t) {
! 230: t = p->next;
! 231: g_free(p);
! 232: }
! 233: s->pool_first_large = NULL;
1.1 root 234: s->pool_cur = s->pool_end = NULL;
235: s->pool_current = NULL;
236: }
237:
238: void tcg_context_init(TCGContext *s)
239: {
240: int op, total_args, n;
241: TCGOpDef *def;
242: TCGArgConstraint *args_ct;
243: int *sorted_args;
244:
245: memset(s, 0, sizeof(*s));
246: s->temps = s->static_temps;
247: s->nb_globals = 0;
248:
249: /* Count total number of arguments and allocate the corresponding
250: space */
251: total_args = 0;
252: for(op = 0; op < NB_OPS; op++) {
253: def = &tcg_op_defs[op];
254: n = def->nb_iargs + def->nb_oargs;
255: total_args += n;
256: }
257:
1.1.1.7 root 258: args_ct = g_malloc(sizeof(TCGArgConstraint) * total_args);
259: sorted_args = g_malloc(sizeof(int) * total_args);
1.1 root 260:
261: for(op = 0; op < NB_OPS; op++) {
262: def = &tcg_op_defs[op];
263: def->args_ct = args_ct;
264: def->sorted_args = sorted_args;
265: n = def->nb_iargs + def->nb_oargs;
266: sorted_args += n;
267: args_ct += n;
268: }
269:
270: tcg_target_init(s);
1.1.1.4 root 271: }
1.1 root 272:
1.1.1.4 root 273: void tcg_prologue_init(TCGContext *s)
274: {
1.1 root 275: /* init global prologue and epilogue */
276: s->code_buf = code_gen_prologue;
277: s->code_ptr = s->code_buf;
278: tcg_target_qemu_prologue(s);
1.1.1.8 ! root 279: flush_icache_range((tcg_target_ulong)s->code_buf,
! 280: (tcg_target_ulong)s->code_ptr);
1.1 root 281: }
282:
283: void tcg_set_frame(TCGContext *s, int reg,
284: tcg_target_long start, tcg_target_long size)
285: {
286: s->frame_start = start;
287: s->frame_end = start + size;
288: s->frame_reg = reg;
289: }
290:
291: void tcg_func_start(TCGContext *s)
292: {
293: int i;
294: tcg_pool_reset(s);
295: s->nb_temps = s->nb_globals;
296: for(i = 0; i < (TCG_TYPE_COUNT * 2); i++)
297: s->first_free_temp[i] = -1;
298: s->labels = tcg_malloc(sizeof(TCGLabel) * TCG_MAX_LABELS);
299: s->nb_labels = 0;
300: s->current_frame_offset = s->frame_start;
301:
302: gen_opc_ptr = gen_opc_buf;
303: gen_opparam_ptr = gen_opparam_buf;
304: }
305:
306: static inline void tcg_temp_alloc(TCGContext *s, int n)
307: {
308: if (n > TCG_MAX_TEMPS)
309: tcg_abort();
310: }
311:
312: static inline int tcg_global_reg_new_internal(TCGType type, int reg,
313: const char *name)
314: {
315: TCGContext *s = &tcg_ctx;
316: TCGTemp *ts;
317: int idx;
318:
319: #if TCG_TARGET_REG_BITS == 32
320: if (type != TCG_TYPE_I32)
321: tcg_abort();
322: #endif
323: if (tcg_regset_test_reg(s->reserved_regs, reg))
324: tcg_abort();
325: idx = s->nb_globals;
326: tcg_temp_alloc(s, s->nb_globals + 1);
327: ts = &s->temps[s->nb_globals];
328: ts->base_type = type;
329: ts->type = type;
330: ts->fixed_reg = 1;
331: ts->reg = reg;
332: ts->name = name;
333: s->nb_globals++;
334: tcg_regset_set_reg(s->reserved_regs, reg);
335: return idx;
336: }
337:
338: TCGv_i32 tcg_global_reg_new_i32(int reg, const char *name)
339: {
340: int idx;
341:
342: idx = tcg_global_reg_new_internal(TCG_TYPE_I32, reg, name);
343: return MAKE_TCGV_I32(idx);
344: }
345:
346: TCGv_i64 tcg_global_reg_new_i64(int reg, const char *name)
347: {
348: int idx;
349:
350: idx = tcg_global_reg_new_internal(TCG_TYPE_I64, reg, name);
351: return MAKE_TCGV_I64(idx);
352: }
353:
354: static inline int tcg_global_mem_new_internal(TCGType type, int reg,
355: tcg_target_long offset,
356: const char *name)
357: {
358: TCGContext *s = &tcg_ctx;
359: TCGTemp *ts;
360: int idx;
361:
362: idx = s->nb_globals;
363: #if TCG_TARGET_REG_BITS == 32
364: if (type == TCG_TYPE_I64) {
365: char buf[64];
366: tcg_temp_alloc(s, s->nb_globals + 2);
367: ts = &s->temps[s->nb_globals];
368: ts->base_type = type;
369: ts->type = TCG_TYPE_I32;
370: ts->fixed_reg = 0;
371: ts->mem_allocated = 1;
372: ts->mem_reg = reg;
373: #ifdef TCG_TARGET_WORDS_BIGENDIAN
374: ts->mem_offset = offset + 4;
375: #else
376: ts->mem_offset = offset;
377: #endif
378: pstrcpy(buf, sizeof(buf), name);
379: pstrcat(buf, sizeof(buf), "_0");
380: ts->name = strdup(buf);
381: ts++;
382:
383: ts->base_type = type;
384: ts->type = TCG_TYPE_I32;
385: ts->fixed_reg = 0;
386: ts->mem_allocated = 1;
387: ts->mem_reg = reg;
388: #ifdef TCG_TARGET_WORDS_BIGENDIAN
389: ts->mem_offset = offset;
390: #else
391: ts->mem_offset = offset + 4;
392: #endif
393: pstrcpy(buf, sizeof(buf), name);
394: pstrcat(buf, sizeof(buf), "_1");
395: ts->name = strdup(buf);
396:
397: s->nb_globals += 2;
398: } else
399: #endif
400: {
401: tcg_temp_alloc(s, s->nb_globals + 1);
402: ts = &s->temps[s->nb_globals];
403: ts->base_type = type;
404: ts->type = type;
405: ts->fixed_reg = 0;
406: ts->mem_allocated = 1;
407: ts->mem_reg = reg;
408: ts->mem_offset = offset;
409: ts->name = name;
410: s->nb_globals++;
411: }
412: return idx;
413: }
414:
415: TCGv_i32 tcg_global_mem_new_i32(int reg, tcg_target_long offset,
416: const char *name)
417: {
418: int idx;
419:
420: idx = tcg_global_mem_new_internal(TCG_TYPE_I32, reg, offset, name);
421: return MAKE_TCGV_I32(idx);
422: }
423:
424: TCGv_i64 tcg_global_mem_new_i64(int reg, tcg_target_long offset,
425: const char *name)
426: {
427: int idx;
428:
429: idx = tcg_global_mem_new_internal(TCG_TYPE_I64, reg, offset, name);
430: return MAKE_TCGV_I64(idx);
431: }
432:
433: static inline int tcg_temp_new_internal(TCGType type, int temp_local)
434: {
435: TCGContext *s = &tcg_ctx;
436: TCGTemp *ts;
437: int idx, k;
438:
439: k = type;
440: if (temp_local)
441: k += TCG_TYPE_COUNT;
442: idx = s->first_free_temp[k];
443: if (idx != -1) {
444: /* There is already an available temp with the
445: right type */
446: ts = &s->temps[idx];
447: s->first_free_temp[k] = ts->next_free_temp;
448: ts->temp_allocated = 1;
449: assert(ts->temp_local == temp_local);
450: } else {
451: idx = s->nb_temps;
452: #if TCG_TARGET_REG_BITS == 32
453: if (type == TCG_TYPE_I64) {
454: tcg_temp_alloc(s, s->nb_temps + 2);
455: ts = &s->temps[s->nb_temps];
456: ts->base_type = type;
457: ts->type = TCG_TYPE_I32;
458: ts->temp_allocated = 1;
459: ts->temp_local = temp_local;
460: ts->name = NULL;
461: ts++;
462: ts->base_type = TCG_TYPE_I32;
463: ts->type = TCG_TYPE_I32;
464: ts->temp_allocated = 1;
465: ts->temp_local = temp_local;
466: ts->name = NULL;
467: s->nb_temps += 2;
468: } else
469: #endif
470: {
471: tcg_temp_alloc(s, s->nb_temps + 1);
472: ts = &s->temps[s->nb_temps];
473: ts->base_type = type;
474: ts->type = type;
475: ts->temp_allocated = 1;
476: ts->temp_local = temp_local;
477: ts->name = NULL;
478: s->nb_temps++;
479: }
480: }
1.1.1.6 root 481:
482: #if defined(CONFIG_DEBUG_TCG)
483: s->temps_in_use++;
484: #endif
1.1 root 485: return idx;
486: }
487:
488: TCGv_i32 tcg_temp_new_internal_i32(int temp_local)
489: {
490: int idx;
491:
492: idx = tcg_temp_new_internal(TCG_TYPE_I32, temp_local);
493: return MAKE_TCGV_I32(idx);
494: }
495:
496: TCGv_i64 tcg_temp_new_internal_i64(int temp_local)
497: {
498: int idx;
499:
500: idx = tcg_temp_new_internal(TCG_TYPE_I64, temp_local);
501: return MAKE_TCGV_I64(idx);
502: }
503:
504: static inline void tcg_temp_free_internal(int idx)
505: {
506: TCGContext *s = &tcg_ctx;
507: TCGTemp *ts;
508: int k;
509:
1.1.1.6 root 510: #if defined(CONFIG_DEBUG_TCG)
511: s->temps_in_use--;
512: if (s->temps_in_use < 0) {
513: fprintf(stderr, "More temporaries freed than allocated!\n");
514: }
515: #endif
516:
1.1 root 517: assert(idx >= s->nb_globals && idx < s->nb_temps);
518: ts = &s->temps[idx];
519: assert(ts->temp_allocated != 0);
520: ts->temp_allocated = 0;
521: k = ts->base_type;
522: if (ts->temp_local)
523: k += TCG_TYPE_COUNT;
524: ts->next_free_temp = s->first_free_temp[k];
525: s->first_free_temp[k] = idx;
526: }
527:
528: void tcg_temp_free_i32(TCGv_i32 arg)
529: {
530: tcg_temp_free_internal(GET_TCGV_I32(arg));
531: }
532:
533: void tcg_temp_free_i64(TCGv_i64 arg)
534: {
535: tcg_temp_free_internal(GET_TCGV_I64(arg));
536: }
537:
538: TCGv_i32 tcg_const_i32(int32_t val)
539: {
540: TCGv_i32 t0;
541: t0 = tcg_temp_new_i32();
542: tcg_gen_movi_i32(t0, val);
543: return t0;
544: }
545:
546: TCGv_i64 tcg_const_i64(int64_t val)
547: {
548: TCGv_i64 t0;
549: t0 = tcg_temp_new_i64();
550: tcg_gen_movi_i64(t0, val);
551: return t0;
552: }
553:
554: TCGv_i32 tcg_const_local_i32(int32_t val)
555: {
556: TCGv_i32 t0;
557: t0 = tcg_temp_local_new_i32();
558: tcg_gen_movi_i32(t0, val);
559: return t0;
560: }
561:
562: TCGv_i64 tcg_const_local_i64(int64_t val)
563: {
564: TCGv_i64 t0;
565: t0 = tcg_temp_local_new_i64();
566: tcg_gen_movi_i64(t0, val);
567: return t0;
568: }
569:
1.1.1.6 root 570: #if defined(CONFIG_DEBUG_TCG)
571: void tcg_clear_temp_count(void)
572: {
573: TCGContext *s = &tcg_ctx;
574: s->temps_in_use = 0;
575: }
576:
577: int tcg_check_temp_count(void)
578: {
579: TCGContext *s = &tcg_ctx;
580: if (s->temps_in_use) {
581: /* Clear the count so that we don't give another
582: * warning immediately next time around.
583: */
584: s->temps_in_use = 0;
585: return 1;
586: }
587: return 0;
588: }
589: #endif
590:
1.1 root 591: void tcg_register_helper(void *func, const char *name)
592: {
593: TCGContext *s = &tcg_ctx;
594: int n;
595: if ((s->nb_helpers + 1) > s->allocated_helpers) {
596: n = s->allocated_helpers;
597: if (n == 0) {
598: n = 4;
599: } else {
600: n *= 2;
601: }
602: s->helpers = realloc(s->helpers, n * sizeof(TCGHelperInfo));
603: s->allocated_helpers = n;
604: }
605: s->helpers[s->nb_helpers].func = (tcg_target_ulong)func;
606: s->helpers[s->nb_helpers].name = name;
607: s->nb_helpers++;
608: }
609:
610: /* Note: we convert the 64 bit args to 32 bit and do some alignment
611: and endian swap. Maybe it would be better to do the alignment
612: and endian swap in tcg_reg_alloc_call(). */
613: void tcg_gen_callN(TCGContext *s, TCGv_ptr func, unsigned int flags,
614: int sizemask, TCGArg ret, int nargs, TCGArg *args)
615: {
616: int i;
617: int real_args;
618: int nb_rets;
619: TCGArg *nparam;
1.1.1.4 root 620:
621: #if defined(TCG_TARGET_EXTEND_ARGS) && TCG_TARGET_REG_BITS == 64
622: for (i = 0; i < nargs; ++i) {
623: int is_64bit = sizemask & (1 << (i+1)*2);
624: int is_signed = sizemask & (2 << (i+1)*2);
625: if (!is_64bit) {
626: TCGv_i64 temp = tcg_temp_new_i64();
627: TCGv_i64 orig = MAKE_TCGV_I64(args[i]);
628: if (is_signed) {
629: tcg_gen_ext32s_i64(temp, orig);
630: } else {
631: tcg_gen_ext32u_i64(temp, orig);
632: }
633: args[i] = GET_TCGV_I64(temp);
634: }
635: }
636: #endif /* TCG_TARGET_EXTEND_ARGS */
637:
1.1 root 638: *gen_opc_ptr++ = INDEX_op_call;
639: nparam = gen_opparam_ptr++;
640: if (ret != TCG_CALL_DUMMY_ARG) {
641: #if TCG_TARGET_REG_BITS < 64
642: if (sizemask & 1) {
643: #ifdef TCG_TARGET_WORDS_BIGENDIAN
644: *gen_opparam_ptr++ = ret + 1;
645: *gen_opparam_ptr++ = ret;
646: #else
647: *gen_opparam_ptr++ = ret;
648: *gen_opparam_ptr++ = ret + 1;
649: #endif
650: nb_rets = 2;
651: } else
652: #endif
653: {
654: *gen_opparam_ptr++ = ret;
655: nb_rets = 1;
656: }
657: } else {
658: nb_rets = 0;
659: }
660: real_args = 0;
661: for (i = 0; i < nargs; i++) {
662: #if TCG_TARGET_REG_BITS < 64
1.1.1.4 root 663: int is_64bit = sizemask & (1 << (i+1)*2);
664: if (is_64bit) {
1.1 root 665: #ifdef TCG_TARGET_CALL_ALIGN_ARGS
666: /* some targets want aligned 64 bit args */
667: if (real_args & 1) {
668: *gen_opparam_ptr++ = TCG_CALL_DUMMY_ARG;
669: real_args++;
670: }
671: #endif
1.1.1.4 root 672: /* If stack grows up, then we will be placing successive
673: arguments at lower addresses, which means we need to
674: reverse the order compared to how we would normally
675: treat either big or little-endian. For those arguments
676: that will wind up in registers, this still works for
677: HPPA (the only current STACK_GROWSUP target) since the
678: argument registers are *also* allocated in decreasing
679: order. If another such target is added, this logic may
680: have to get more complicated to differentiate between
681: stack arguments and register arguments. */
682: #if defined(TCG_TARGET_WORDS_BIGENDIAN) != defined(TCG_TARGET_STACK_GROWSUP)
1.1 root 683: *gen_opparam_ptr++ = args[i] + 1;
684: *gen_opparam_ptr++ = args[i];
685: #else
686: *gen_opparam_ptr++ = args[i];
687: *gen_opparam_ptr++ = args[i] + 1;
688: #endif
689: real_args += 2;
1.1.1.4 root 690: continue;
1.1 root 691: }
1.1.1.4 root 692: #endif /* TCG_TARGET_REG_BITS < 64 */
693:
694: *gen_opparam_ptr++ = args[i];
695: real_args++;
1.1 root 696: }
697: *gen_opparam_ptr++ = GET_TCGV_PTR(func);
698:
699: *gen_opparam_ptr++ = flags;
700:
701: *nparam = (nb_rets << 16) | (real_args + 1);
702:
703: /* total parameters, needed to go backward in the instruction stream */
704: *gen_opparam_ptr++ = 1 + nb_rets + real_args + 3;
1.1.1.4 root 705:
706: #if defined(TCG_TARGET_EXTEND_ARGS) && TCG_TARGET_REG_BITS == 64
707: for (i = 0; i < nargs; ++i) {
708: int is_64bit = sizemask & (1 << (i+1)*2);
709: if (!is_64bit) {
710: TCGv_i64 temp = MAKE_TCGV_I64(args[i]);
711: tcg_temp_free_i64(temp);
712: }
713: }
714: #endif /* TCG_TARGET_EXTEND_ARGS */
1.1 root 715: }
716:
717: #if TCG_TARGET_REG_BITS == 32
718: void tcg_gen_shifti_i64(TCGv_i64 ret, TCGv_i64 arg1,
719: int c, int right, int arith)
720: {
721: if (c == 0) {
722: tcg_gen_mov_i32(TCGV_LOW(ret), TCGV_LOW(arg1));
723: tcg_gen_mov_i32(TCGV_HIGH(ret), TCGV_HIGH(arg1));
724: } else if (c >= 32) {
725: c -= 32;
726: if (right) {
727: if (arith) {
728: tcg_gen_sari_i32(TCGV_LOW(ret), TCGV_HIGH(arg1), c);
729: tcg_gen_sari_i32(TCGV_HIGH(ret), TCGV_HIGH(arg1), 31);
730: } else {
731: tcg_gen_shri_i32(TCGV_LOW(ret), TCGV_HIGH(arg1), c);
732: tcg_gen_movi_i32(TCGV_HIGH(ret), 0);
733: }
734: } else {
735: tcg_gen_shli_i32(TCGV_HIGH(ret), TCGV_LOW(arg1), c);
736: tcg_gen_movi_i32(TCGV_LOW(ret), 0);
737: }
738: } else {
739: TCGv_i32 t0, t1;
740:
741: t0 = tcg_temp_new_i32();
742: t1 = tcg_temp_new_i32();
743: if (right) {
744: tcg_gen_shli_i32(t0, TCGV_HIGH(arg1), 32 - c);
745: if (arith)
746: tcg_gen_sari_i32(t1, TCGV_HIGH(arg1), c);
747: else
748: tcg_gen_shri_i32(t1, TCGV_HIGH(arg1), c);
749: tcg_gen_shri_i32(TCGV_LOW(ret), TCGV_LOW(arg1), c);
750: tcg_gen_or_i32(TCGV_LOW(ret), TCGV_LOW(ret), t0);
751: tcg_gen_mov_i32(TCGV_HIGH(ret), t1);
752: } else {
753: tcg_gen_shri_i32(t0, TCGV_LOW(arg1), 32 - c);
754: /* Note: ret can be the same as arg1, so we use t1 */
755: tcg_gen_shli_i32(t1, TCGV_LOW(arg1), c);
756: tcg_gen_shli_i32(TCGV_HIGH(ret), TCGV_HIGH(arg1), c);
757: tcg_gen_or_i32(TCGV_HIGH(ret), TCGV_HIGH(ret), t0);
758: tcg_gen_mov_i32(TCGV_LOW(ret), t1);
759: }
760: tcg_temp_free_i32(t0);
761: tcg_temp_free_i32(t1);
762: }
763: }
764: #endif
765:
1.1.1.4 root 766:
1.1 root 767: static void tcg_reg_alloc_start(TCGContext *s)
768: {
769: int i;
770: TCGTemp *ts;
771: for(i = 0; i < s->nb_globals; i++) {
772: ts = &s->temps[i];
773: if (ts->fixed_reg) {
774: ts->val_type = TEMP_VAL_REG;
775: } else {
776: ts->val_type = TEMP_VAL_MEM;
777: }
778: }
779: for(i = s->nb_globals; i < s->nb_temps; i++) {
780: ts = &s->temps[i];
781: ts->val_type = TEMP_VAL_DEAD;
782: ts->mem_allocated = 0;
783: ts->fixed_reg = 0;
784: }
785: for(i = 0; i < TCG_TARGET_NB_REGS; i++) {
786: s->reg_to_temp[i] = -1;
787: }
788: }
789:
790: static char *tcg_get_arg_str_idx(TCGContext *s, char *buf, int buf_size,
791: int idx)
792: {
793: TCGTemp *ts;
794:
1.1.1.7 root 795: assert(idx >= 0 && idx < s->nb_temps);
1.1 root 796: ts = &s->temps[idx];
1.1.1.7 root 797: assert(ts);
1.1 root 798: if (idx < s->nb_globals) {
799: pstrcpy(buf, buf_size, ts->name);
800: } else {
801: if (ts->temp_local)
802: snprintf(buf, buf_size, "loc%d", idx - s->nb_globals);
803: else
804: snprintf(buf, buf_size, "tmp%d", idx - s->nb_globals);
805: }
806: return buf;
807: }
808:
809: char *tcg_get_arg_str_i32(TCGContext *s, char *buf, int buf_size, TCGv_i32 arg)
810: {
811: return tcg_get_arg_str_idx(s, buf, buf_size, GET_TCGV_I32(arg));
812: }
813:
814: char *tcg_get_arg_str_i64(TCGContext *s, char *buf, int buf_size, TCGv_i64 arg)
815: {
816: return tcg_get_arg_str_idx(s, buf, buf_size, GET_TCGV_I64(arg));
817: }
818:
819: static int helper_cmp(const void *p1, const void *p2)
820: {
821: const TCGHelperInfo *th1 = p1;
822: const TCGHelperInfo *th2 = p2;
823: if (th1->func < th2->func)
824: return -1;
825: else if (th1->func == th2->func)
826: return 0;
827: else
828: return 1;
829: }
830:
831: /* find helper definition (Note: A hash table would be better) */
832: static TCGHelperInfo *tcg_find_helper(TCGContext *s, tcg_target_ulong val)
833: {
834: int m, m_min, m_max;
835: TCGHelperInfo *th;
836: tcg_target_ulong v;
837:
838: if (unlikely(!s->helpers_sorted)) {
839: qsort(s->helpers, s->nb_helpers, sizeof(TCGHelperInfo),
840: helper_cmp);
841: s->helpers_sorted = 1;
842: }
843:
844: /* binary search */
845: m_min = 0;
846: m_max = s->nb_helpers - 1;
847: while (m_min <= m_max) {
848: m = (m_min + m_max) >> 1;
849: th = &s->helpers[m];
850: v = th->func;
851: if (v == val)
852: return th;
853: else if (val < v) {
854: m_max = m - 1;
855: } else {
856: m_min = m + 1;
857: }
858: }
859: return NULL;
860: }
861:
862: static const char * const cond_name[] =
863: {
864: [TCG_COND_EQ] = "eq",
865: [TCG_COND_NE] = "ne",
866: [TCG_COND_LT] = "lt",
867: [TCG_COND_GE] = "ge",
868: [TCG_COND_LE] = "le",
869: [TCG_COND_GT] = "gt",
870: [TCG_COND_LTU] = "ltu",
871: [TCG_COND_GEU] = "geu",
872: [TCG_COND_LEU] = "leu",
873: [TCG_COND_GTU] = "gtu"
874: };
875:
876: void tcg_dump_ops(TCGContext *s, FILE *outfile)
877: {
878: const uint16_t *opc_ptr;
879: const TCGArg *args;
880: TCGArg arg;
1.1.1.4 root 881: TCGOpcode c;
882: int i, k, nb_oargs, nb_iargs, nb_cargs, first_insn;
1.1 root 883: const TCGOpDef *def;
884: char buf[128];
885:
886: first_insn = 1;
887: opc_ptr = gen_opc_buf;
888: args = gen_opparam_buf;
889: while (opc_ptr < gen_opc_ptr) {
890: c = *opc_ptr++;
891: def = &tcg_op_defs[c];
892: if (c == INDEX_op_debug_insn_start) {
893: uint64_t pc;
894: #if TARGET_LONG_BITS > TCG_TARGET_REG_BITS
895: pc = ((uint64_t)args[1] << 32) | args[0];
896: #else
897: pc = args[0];
898: #endif
899: if (!first_insn)
900: fprintf(outfile, "\n");
901: fprintf(outfile, " ---- 0x%" PRIx64, pc);
902: first_insn = 0;
903: nb_oargs = def->nb_oargs;
904: nb_iargs = def->nb_iargs;
905: nb_cargs = def->nb_cargs;
906: } else if (c == INDEX_op_call) {
907: TCGArg arg;
908:
909: /* variable number of arguments */
910: arg = *args++;
911: nb_oargs = arg >> 16;
912: nb_iargs = arg & 0xffff;
913: nb_cargs = def->nb_cargs;
914:
915: fprintf(outfile, " %s ", def->name);
916:
917: /* function name */
918: fprintf(outfile, "%s",
919: tcg_get_arg_str_idx(s, buf, sizeof(buf), args[nb_oargs + nb_iargs - 1]));
920: /* flags */
921: fprintf(outfile, ",$0x%" TCG_PRIlx,
922: args[nb_oargs + nb_iargs]);
923: /* nb out args */
924: fprintf(outfile, ",$%d", nb_oargs);
925: for(i = 0; i < nb_oargs; i++) {
926: fprintf(outfile, ",");
927: fprintf(outfile, "%s",
928: tcg_get_arg_str_idx(s, buf, sizeof(buf), args[i]));
929: }
930: for(i = 0; i < (nb_iargs - 1); i++) {
931: fprintf(outfile, ",");
932: if (args[nb_oargs + i] == TCG_CALL_DUMMY_ARG) {
933: fprintf(outfile, "<dummy>");
934: } else {
935: fprintf(outfile, "%s",
936: tcg_get_arg_str_idx(s, buf, sizeof(buf), args[nb_oargs + i]));
937: }
938: }
939: } else if (c == INDEX_op_movi_i32
940: #if TCG_TARGET_REG_BITS == 64
941: || c == INDEX_op_movi_i64
942: #endif
943: ) {
944: tcg_target_ulong val;
945: TCGHelperInfo *th;
946:
947: nb_oargs = def->nb_oargs;
948: nb_iargs = def->nb_iargs;
949: nb_cargs = def->nb_cargs;
950: fprintf(outfile, " %s %s,$", def->name,
951: tcg_get_arg_str_idx(s, buf, sizeof(buf), args[0]));
952: val = args[1];
953: th = tcg_find_helper(s, val);
954: if (th) {
955: fprintf(outfile, "%s", th->name);
956: } else {
957: if (c == INDEX_op_movi_i32)
958: fprintf(outfile, "0x%x", (uint32_t)val);
959: else
960: fprintf(outfile, "0x%" PRIx64 , (uint64_t)val);
961: }
962: } else {
963: fprintf(outfile, " %s ", def->name);
964: if (c == INDEX_op_nopn) {
965: /* variable number of arguments */
966: nb_cargs = *args;
967: nb_oargs = 0;
968: nb_iargs = 0;
969: } else {
970: nb_oargs = def->nb_oargs;
971: nb_iargs = def->nb_iargs;
972: nb_cargs = def->nb_cargs;
973: }
974:
975: k = 0;
976: for(i = 0; i < nb_oargs; i++) {
977: if (k != 0)
978: fprintf(outfile, ",");
979: fprintf(outfile, "%s",
980: tcg_get_arg_str_idx(s, buf, sizeof(buf), args[k++]));
981: }
982: for(i = 0; i < nb_iargs; i++) {
983: if (k != 0)
984: fprintf(outfile, ",");
985: fprintf(outfile, "%s",
986: tcg_get_arg_str_idx(s, buf, sizeof(buf), args[k++]));
987: }
1.1.1.4 root 988: switch (c) {
989: case INDEX_op_brcond_i32:
1.1 root 990: #if TCG_TARGET_REG_BITS == 32
1.1.1.4 root 991: case INDEX_op_brcond2_i32:
1.1 root 992: #elif TCG_TARGET_REG_BITS == 64
1.1.1.4 root 993: case INDEX_op_brcond_i64:
994: #endif
995: case INDEX_op_setcond_i32:
996: #if TCG_TARGET_REG_BITS == 32
997: case INDEX_op_setcond2_i32:
998: #elif TCG_TARGET_REG_BITS == 64
999: case INDEX_op_setcond_i64:
1.1 root 1000: #endif
1001: if (args[k] < ARRAY_SIZE(cond_name) && cond_name[args[k]])
1002: fprintf(outfile, ",%s", cond_name[args[k++]]);
1003: else
1004: fprintf(outfile, ",$0x%" TCG_PRIlx, args[k++]);
1005: i = 1;
1.1.1.4 root 1006: break;
1007: default:
1.1 root 1008: i = 0;
1.1.1.4 root 1009: break;
1010: }
1.1 root 1011: for(; i < nb_cargs; i++) {
1012: if (k != 0)
1013: fprintf(outfile, ",");
1014: arg = args[k++];
1015: fprintf(outfile, "$0x%" TCG_PRIlx, arg);
1016: }
1017: }
1018: fprintf(outfile, "\n");
1019: args += nb_iargs + nb_oargs + nb_cargs;
1020: }
1021: }
1022:
1023: /* we give more priority to constraints with less registers */
1024: static int get_constraint_priority(const TCGOpDef *def, int k)
1025: {
1026: const TCGArgConstraint *arg_ct;
1027:
1028: int i, n;
1029: arg_ct = &def->args_ct[k];
1030: if (arg_ct->ct & TCG_CT_ALIAS) {
1031: /* an alias is equivalent to a single register */
1032: n = 1;
1033: } else {
1034: if (!(arg_ct->ct & TCG_CT_REG))
1035: return 0;
1036: n = 0;
1037: for(i = 0; i < TCG_TARGET_NB_REGS; i++) {
1038: if (tcg_regset_test_reg(arg_ct->u.regs, i))
1039: n++;
1040: }
1041: }
1042: return TCG_TARGET_NB_REGS - n + 1;
1043: }
1044:
1045: /* sort from highest priority to lowest */
1046: static void sort_constraints(TCGOpDef *def, int start, int n)
1047: {
1048: int i, j, p1, p2, tmp;
1049:
1050: for(i = 0; i < n; i++)
1051: def->sorted_args[start + i] = start + i;
1052: if (n <= 1)
1053: return;
1054: for(i = 0; i < n - 1; i++) {
1055: for(j = i + 1; j < n; j++) {
1056: p1 = get_constraint_priority(def, def->sorted_args[start + i]);
1057: p2 = get_constraint_priority(def, def->sorted_args[start + j]);
1058: if (p1 < p2) {
1059: tmp = def->sorted_args[start + i];
1060: def->sorted_args[start + i] = def->sorted_args[start + j];
1061: def->sorted_args[start + j] = tmp;
1062: }
1063: }
1064: }
1065: }
1066:
1067: void tcg_add_target_add_op_defs(const TCGTargetOpDef *tdefs)
1068: {
1.1.1.4 root 1069: TCGOpcode op;
1.1 root 1070: TCGOpDef *def;
1071: const char *ct_str;
1072: int i, nb_args;
1073:
1074: for(;;) {
1.1.1.4 root 1075: if (tdefs->op == (TCGOpcode)-1)
1.1 root 1076: break;
1077: op = tdefs->op;
1.1.1.5 root 1078: assert((unsigned)op < NB_OPS);
1.1 root 1079: def = &tcg_op_defs[op];
1.1.1.4 root 1080: #if defined(CONFIG_DEBUG_TCG)
1081: /* Duplicate entry in op definitions? */
1082: assert(!def->used);
1083: def->used = 1;
1084: #endif
1.1 root 1085: nb_args = def->nb_iargs + def->nb_oargs;
1086: for(i = 0; i < nb_args; i++) {
1087: ct_str = tdefs->args_ct_str[i];
1.1.1.4 root 1088: /* Incomplete TCGTargetOpDef entry? */
1089: assert(ct_str != NULL);
1.1 root 1090: tcg_regset_clear(def->args_ct[i].u.regs);
1091: def->args_ct[i].ct = 0;
1092: if (ct_str[0] >= '0' && ct_str[0] <= '9') {
1093: int oarg;
1094: oarg = ct_str[0] - '0';
1095: assert(oarg < def->nb_oargs);
1096: assert(def->args_ct[oarg].ct & TCG_CT_REG);
1097: /* TCG_CT_ALIAS is for the output arguments. The input
1098: argument is tagged with TCG_CT_IALIAS. */
1099: def->args_ct[i] = def->args_ct[oarg];
1100: def->args_ct[oarg].ct = TCG_CT_ALIAS;
1101: def->args_ct[oarg].alias_index = i;
1102: def->args_ct[i].ct |= TCG_CT_IALIAS;
1103: def->args_ct[i].alias_index = oarg;
1104: } else {
1105: for(;;) {
1106: if (*ct_str == '\0')
1107: break;
1108: switch(*ct_str) {
1109: case 'i':
1110: def->args_ct[i].ct |= TCG_CT_CONST;
1111: ct_str++;
1112: break;
1113: default:
1114: if (target_parse_constraint(&def->args_ct[i], &ct_str) < 0) {
1115: fprintf(stderr, "Invalid constraint '%s' for arg %d of operation '%s'\n",
1116: ct_str, i, def->name);
1117: exit(1);
1118: }
1119: }
1120: }
1121: }
1122: }
1123:
1.1.1.4 root 1124: /* TCGTargetOpDef entry with too much information? */
1125: assert(i == TCG_MAX_OP_ARGS || tdefs->args_ct_str[i] == NULL);
1126:
1.1 root 1127: /* sort the constraints (XXX: this is just an heuristic) */
1128: sort_constraints(def, 0, def->nb_oargs);
1129: sort_constraints(def, def->nb_oargs, def->nb_iargs);
1130:
1131: #if 0
1132: {
1133: int i;
1134:
1135: printf("%s: sorted=", def->name);
1136: for(i = 0; i < def->nb_oargs + def->nb_iargs; i++)
1137: printf(" %d", def->sorted_args[i]);
1138: printf("\n");
1139: }
1140: #endif
1141: tdefs++;
1142: }
1143:
1.1.1.4 root 1144: #if defined(CONFIG_DEBUG_TCG)
1145: i = 0;
1146: for (op = 0; op < ARRAY_SIZE(tcg_op_defs); op++) {
1.1.1.7 root 1147: const TCGOpDef *def = &tcg_op_defs[op];
1148: if (op < INDEX_op_call
1149: || op == INDEX_op_debug_insn_start
1150: || (def->flags & TCG_OPF_NOT_PRESENT)) {
1.1.1.4 root 1151: /* Wrong entry in op definitions? */
1.1.1.7 root 1152: if (def->used) {
1153: fprintf(stderr, "Invalid op definition for %s\n", def->name);
1.1.1.4 root 1154: i = 1;
1155: }
1156: } else {
1157: /* Missing entry in op definitions? */
1.1.1.7 root 1158: if (!def->used) {
1159: fprintf(stderr, "Missing op definition for %s\n", def->name);
1.1.1.4 root 1160: i = 1;
1161: }
1162: }
1163: }
1164: if (i == 1) {
1165: tcg_abort();
1166: }
1167: #endif
1.1 root 1168: }
1169:
1170: #ifdef USE_LIVENESS_ANALYSIS
1171:
1172: /* set a nop for an operation using 'nb_args' */
1173: static inline void tcg_set_nop(TCGContext *s, uint16_t *opc_ptr,
1174: TCGArg *args, int nb_args)
1175: {
1176: if (nb_args == 0) {
1177: *opc_ptr = INDEX_op_nop;
1178: } else {
1179: *opc_ptr = INDEX_op_nopn;
1180: args[0] = nb_args;
1181: args[nb_args - 1] = nb_args;
1182: }
1183: }
1184:
1185: /* liveness analysis: end of function: globals are live, temps are
1186: dead. */
1187: /* XXX: at this stage, not used as there would be little gains because
1188: most TBs end with a conditional jump. */
1189: static inline void tcg_la_func_end(TCGContext *s, uint8_t *dead_temps)
1190: {
1191: memset(dead_temps, 0, s->nb_globals);
1192: memset(dead_temps + s->nb_globals, 1, s->nb_temps - s->nb_globals);
1193: }
1194:
1195: /* liveness analysis: end of basic block: globals are live, temps are
1196: dead, local temps are live. */
1197: static inline void tcg_la_bb_end(TCGContext *s, uint8_t *dead_temps)
1198: {
1199: int i;
1200: TCGTemp *ts;
1201:
1202: memset(dead_temps, 0, s->nb_globals);
1203: ts = &s->temps[s->nb_globals];
1204: for(i = s->nb_globals; i < s->nb_temps; i++) {
1205: if (ts->temp_local)
1206: dead_temps[i] = 0;
1207: else
1208: dead_temps[i] = 1;
1209: ts++;
1210: }
1211: }
1212:
1.1.1.6 root 1213: /* Liveness analysis : update the opc_dead_args array to tell if a
1.1 root 1214: given input arguments is dead. Instructions updating dead
1215: temporaries are removed. */
1216: static void tcg_liveness_analysis(TCGContext *s)
1217: {
1.1.1.4 root 1218: int i, op_index, nb_args, nb_iargs, nb_oargs, arg, nb_ops;
1219: TCGOpcode op;
1.1 root 1220: TCGArg *args;
1221: const TCGOpDef *def;
1222: uint8_t *dead_temps;
1.1.1.6 root 1223: unsigned int dead_args;
1.1 root 1224:
1225: gen_opc_ptr++; /* skip end */
1226:
1227: nb_ops = gen_opc_ptr - gen_opc_buf;
1228:
1.1.1.6 root 1229: s->op_dead_args = tcg_malloc(nb_ops * sizeof(uint16_t));
1.1 root 1230:
1231: dead_temps = tcg_malloc(s->nb_temps);
1232: memset(dead_temps, 1, s->nb_temps);
1233:
1234: args = gen_opparam_ptr;
1235: op_index = nb_ops - 1;
1236: while (op_index >= 0) {
1237: op = gen_opc_buf[op_index];
1238: def = &tcg_op_defs[op];
1239: switch(op) {
1240: case INDEX_op_call:
1241: {
1242: int call_flags;
1243:
1244: nb_args = args[-1];
1245: args -= nb_args;
1246: nb_iargs = args[0] & 0xffff;
1247: nb_oargs = args[0] >> 16;
1248: args++;
1249: call_flags = args[nb_oargs + nb_iargs];
1250:
1251: /* pure functions can be removed if their result is not
1252: used */
1253: if (call_flags & TCG_CALL_PURE) {
1254: for(i = 0; i < nb_oargs; i++) {
1255: arg = args[i];
1256: if (!dead_temps[arg])
1257: goto do_not_remove_call;
1258: }
1259: tcg_set_nop(s, gen_opc_buf + op_index,
1260: args - 1, nb_args);
1261: } else {
1262: do_not_remove_call:
1263:
1264: /* output args are dead */
1.1.1.6 root 1265: dead_args = 0;
1.1 root 1266: for(i = 0; i < nb_oargs; i++) {
1267: arg = args[i];
1.1.1.6 root 1268: if (dead_temps[arg]) {
1269: dead_args |= (1 << i);
1270: }
1.1 root 1271: dead_temps[arg] = 1;
1272: }
1273:
1.1.1.2 root 1274: if (!(call_flags & TCG_CALL_CONST)) {
1275: /* globals are live (they may be used by the call) */
1276: memset(dead_temps, 0, s->nb_globals);
1277: }
1278:
1.1 root 1279: /* input args are live */
1.1.1.6 root 1280: for(i = nb_oargs; i < nb_iargs + nb_oargs; i++) {
1281: arg = args[i];
1.1 root 1282: if (arg != TCG_CALL_DUMMY_ARG) {
1283: if (dead_temps[arg]) {
1.1.1.6 root 1284: dead_args |= (1 << i);
1.1 root 1285: }
1286: dead_temps[arg] = 0;
1287: }
1288: }
1.1.1.6 root 1289: s->op_dead_args[op_index] = dead_args;
1.1 root 1290: }
1291: args--;
1292: }
1293: break;
1294: case INDEX_op_set_label:
1295: args--;
1296: /* mark end of basic block */
1297: tcg_la_bb_end(s, dead_temps);
1298: break;
1299: case INDEX_op_debug_insn_start:
1300: args -= def->nb_args;
1301: break;
1302: case INDEX_op_nopn:
1303: nb_args = args[-1];
1304: args -= nb_args;
1305: break;
1306: case INDEX_op_discard:
1307: args--;
1308: /* mark the temporary as dead */
1309: dead_temps[args[0]] = 1;
1310: break;
1311: case INDEX_op_end:
1312: break;
1313: /* XXX: optimize by hardcoding common cases (e.g. triadic ops) */
1314: default:
1315: args -= def->nb_args;
1316: nb_iargs = def->nb_iargs;
1317: nb_oargs = def->nb_oargs;
1318:
1319: /* Test if the operation can be removed because all
1320: its outputs are dead. We assume that nb_oargs == 0
1321: implies side effects */
1322: if (!(def->flags & TCG_OPF_SIDE_EFFECTS) && nb_oargs != 0) {
1323: for(i = 0; i < nb_oargs; i++) {
1324: arg = args[i];
1325: if (!dead_temps[arg])
1326: goto do_not_remove;
1327: }
1328: tcg_set_nop(s, gen_opc_buf + op_index, args, def->nb_args);
1329: #ifdef CONFIG_PROFILER
1330: s->del_op_count++;
1331: #endif
1332: } else {
1333: do_not_remove:
1334:
1335: /* output args are dead */
1.1.1.6 root 1336: dead_args = 0;
1.1 root 1337: for(i = 0; i < nb_oargs; i++) {
1338: arg = args[i];
1.1.1.6 root 1339: if (dead_temps[arg]) {
1340: dead_args |= (1 << i);
1341: }
1.1 root 1342: dead_temps[arg] = 1;
1343: }
1344:
1345: /* if end of basic block, update */
1346: if (def->flags & TCG_OPF_BB_END) {
1347: tcg_la_bb_end(s, dead_temps);
1348: } else if (def->flags & TCG_OPF_CALL_CLOBBER) {
1349: /* globals are live */
1350: memset(dead_temps, 0, s->nb_globals);
1351: }
1352:
1353: /* input args are live */
1.1.1.6 root 1354: for(i = nb_oargs; i < nb_oargs + nb_iargs; i++) {
1355: arg = args[i];
1.1 root 1356: if (dead_temps[arg]) {
1.1.1.6 root 1357: dead_args |= (1 << i);
1.1 root 1358: }
1359: dead_temps[arg] = 0;
1360: }
1.1.1.6 root 1361: s->op_dead_args[op_index] = dead_args;
1.1 root 1362: }
1363: break;
1364: }
1365: op_index--;
1366: }
1367:
1368: if (args != gen_opparam_buf)
1369: tcg_abort();
1370: }
1371: #else
1372: /* dummy liveness analysis */
1.1.1.4 root 1373: static void tcg_liveness_analysis(TCGContext *s)
1.1 root 1374: {
1375: int nb_ops;
1376: nb_ops = gen_opc_ptr - gen_opc_buf;
1377:
1.1.1.6 root 1378: s->op_dead_args = tcg_malloc(nb_ops * sizeof(uint16_t));
1379: memset(s->op_dead_args, 0, nb_ops * sizeof(uint16_t));
1.1 root 1380: }
1381: #endif
1382:
1383: #ifndef NDEBUG
1384: static void dump_regs(TCGContext *s)
1385: {
1386: TCGTemp *ts;
1387: int i;
1388: char buf[64];
1389:
1390: for(i = 0; i < s->nb_temps; i++) {
1391: ts = &s->temps[i];
1392: printf(" %10s: ", tcg_get_arg_str_idx(s, buf, sizeof(buf), i));
1393: switch(ts->val_type) {
1394: case TEMP_VAL_REG:
1395: printf("%s", tcg_target_reg_names[ts->reg]);
1396: break;
1397: case TEMP_VAL_MEM:
1398: printf("%d(%s)", (int)ts->mem_offset, tcg_target_reg_names[ts->mem_reg]);
1399: break;
1400: case TEMP_VAL_CONST:
1401: printf("$0x%" TCG_PRIlx, ts->val);
1402: break;
1403: case TEMP_VAL_DEAD:
1404: printf("D");
1405: break;
1406: default:
1407: printf("???");
1408: break;
1409: }
1410: printf("\n");
1411: }
1412:
1413: for(i = 0; i < TCG_TARGET_NB_REGS; i++) {
1414: if (s->reg_to_temp[i] >= 0) {
1415: printf("%s: %s\n",
1416: tcg_target_reg_names[i],
1417: tcg_get_arg_str_idx(s, buf, sizeof(buf), s->reg_to_temp[i]));
1418: }
1419: }
1420: }
1421:
1422: static void check_regs(TCGContext *s)
1423: {
1424: int reg, k;
1425: TCGTemp *ts;
1426: char buf[64];
1427:
1428: for(reg = 0; reg < TCG_TARGET_NB_REGS; reg++) {
1429: k = s->reg_to_temp[reg];
1430: if (k >= 0) {
1431: ts = &s->temps[k];
1432: if (ts->val_type != TEMP_VAL_REG ||
1433: ts->reg != reg) {
1434: printf("Inconsistency for register %s:\n",
1435: tcg_target_reg_names[reg]);
1436: goto fail;
1437: }
1438: }
1439: }
1440: for(k = 0; k < s->nb_temps; k++) {
1441: ts = &s->temps[k];
1442: if (ts->val_type == TEMP_VAL_REG &&
1443: !ts->fixed_reg &&
1444: s->reg_to_temp[ts->reg] != k) {
1445: printf("Inconsistency for temp %s:\n",
1446: tcg_get_arg_str_idx(s, buf, sizeof(buf), k));
1447: fail:
1448: printf("reg state:\n");
1449: dump_regs(s);
1450: tcg_abort();
1451: }
1452: }
1453: }
1454: #endif
1455:
1456: static void temp_allocate_frame(TCGContext *s, int temp)
1457: {
1458: TCGTemp *ts;
1459: ts = &s->temps[temp];
1.1.1.6 root 1460: #ifndef __sparc_v9__ /* Sparc64 stack is accessed with offset of 2047 */
1461: s->current_frame_offset = (s->current_frame_offset +
1462: (tcg_target_long)sizeof(tcg_target_long) - 1) &
1463: ~(sizeof(tcg_target_long) - 1);
1464: #endif
1465: if (s->current_frame_offset + (tcg_target_long)sizeof(tcg_target_long) >
1466: s->frame_end) {
1.1 root 1467: tcg_abort();
1.1.1.6 root 1468: }
1.1 root 1469: ts->mem_offset = s->current_frame_offset;
1470: ts->mem_reg = s->frame_reg;
1471: ts->mem_allocated = 1;
1.1.1.6 root 1472: s->current_frame_offset += (tcg_target_long)sizeof(tcg_target_long);
1.1 root 1473: }
1474:
1475: /* free register 'reg' by spilling the corresponding temporary if necessary */
1476: static void tcg_reg_free(TCGContext *s, int reg)
1477: {
1478: TCGTemp *ts;
1479: int temp;
1480:
1481: temp = s->reg_to_temp[reg];
1482: if (temp != -1) {
1483: ts = &s->temps[temp];
1484: assert(ts->val_type == TEMP_VAL_REG);
1485: if (!ts->mem_coherent) {
1486: if (!ts->mem_allocated)
1487: temp_allocate_frame(s, temp);
1488: tcg_out_st(s, ts->type, reg, ts->mem_reg, ts->mem_offset);
1489: }
1490: ts->val_type = TEMP_VAL_MEM;
1491: s->reg_to_temp[reg] = -1;
1492: }
1493: }
1494:
1495: /* Allocate a register belonging to reg1 & ~reg2 */
1496: static int tcg_reg_alloc(TCGContext *s, TCGRegSet reg1, TCGRegSet reg2)
1497: {
1498: int i, reg;
1499: TCGRegSet reg_ct;
1500:
1501: tcg_regset_andnot(reg_ct, reg1, reg2);
1502:
1503: /* first try free registers */
1504: for(i = 0; i < ARRAY_SIZE(tcg_target_reg_alloc_order); i++) {
1505: reg = tcg_target_reg_alloc_order[i];
1506: if (tcg_regset_test_reg(reg_ct, reg) && s->reg_to_temp[reg] == -1)
1507: return reg;
1508: }
1509:
1510: /* XXX: do better spill choice */
1511: for(i = 0; i < ARRAY_SIZE(tcg_target_reg_alloc_order); i++) {
1512: reg = tcg_target_reg_alloc_order[i];
1513: if (tcg_regset_test_reg(reg_ct, reg)) {
1514: tcg_reg_free(s, reg);
1515: return reg;
1516: }
1517: }
1518:
1519: tcg_abort();
1520: }
1521:
1522: /* save a temporary to memory. 'allocated_regs' is used in case a
1523: temporary registers needs to be allocated to store a constant. */
1524: static void temp_save(TCGContext *s, int temp, TCGRegSet allocated_regs)
1525: {
1526: TCGTemp *ts;
1527: int reg;
1528:
1529: ts = &s->temps[temp];
1530: if (!ts->fixed_reg) {
1531: switch(ts->val_type) {
1532: case TEMP_VAL_REG:
1533: tcg_reg_free(s, ts->reg);
1534: break;
1535: case TEMP_VAL_DEAD:
1536: ts->val_type = TEMP_VAL_MEM;
1537: break;
1538: case TEMP_VAL_CONST:
1539: reg = tcg_reg_alloc(s, tcg_target_available_regs[ts->type],
1540: allocated_regs);
1541: if (!ts->mem_allocated)
1542: temp_allocate_frame(s, temp);
1543: tcg_out_movi(s, ts->type, reg, ts->val);
1544: tcg_out_st(s, ts->type, reg, ts->mem_reg, ts->mem_offset);
1545: ts->val_type = TEMP_VAL_MEM;
1546: break;
1547: case TEMP_VAL_MEM:
1548: break;
1549: default:
1550: tcg_abort();
1551: }
1552: }
1553: }
1554:
1.1.1.8 ! root 1555: /* save globals to their canonical location and assume they can be
1.1 root 1556: modified be the following code. 'allocated_regs' is used in case a
1557: temporary registers needs to be allocated to store a constant. */
1558: static void save_globals(TCGContext *s, TCGRegSet allocated_regs)
1559: {
1560: int i;
1561:
1562: for(i = 0; i < s->nb_globals; i++) {
1563: temp_save(s, i, allocated_regs);
1564: }
1565: }
1566:
1567: /* at the end of a basic block, we assume all temporaries are dead and
1568: all globals are stored at their canonical location. */
1569: static void tcg_reg_alloc_bb_end(TCGContext *s, TCGRegSet allocated_regs)
1570: {
1571: TCGTemp *ts;
1572: int i;
1573:
1574: for(i = s->nb_globals; i < s->nb_temps; i++) {
1575: ts = &s->temps[i];
1576: if (ts->temp_local) {
1577: temp_save(s, i, allocated_regs);
1578: } else {
1579: if (ts->val_type == TEMP_VAL_REG) {
1580: s->reg_to_temp[ts->reg] = -1;
1581: }
1582: ts->val_type = TEMP_VAL_DEAD;
1583: }
1584: }
1585:
1586: save_globals(s, allocated_regs);
1587: }
1588:
1.1.1.6 root 1589: #define IS_DEAD_ARG(n) ((dead_args >> (n)) & 1)
1.1 root 1590:
1591: static void tcg_reg_alloc_movi(TCGContext *s, const TCGArg *args)
1592: {
1593: TCGTemp *ots;
1594: tcg_target_ulong val;
1595:
1596: ots = &s->temps[args[0]];
1597: val = args[1];
1598:
1599: if (ots->fixed_reg) {
1600: /* for fixed registers, we do not do any constant
1601: propagation */
1602: tcg_out_movi(s, ots->type, ots->reg, val);
1603: } else {
1604: /* The movi is not explicitly generated here */
1605: if (ots->val_type == TEMP_VAL_REG)
1606: s->reg_to_temp[ots->reg] = -1;
1607: ots->val_type = TEMP_VAL_CONST;
1608: ots->val = val;
1609: }
1610: }
1611:
1612: static void tcg_reg_alloc_mov(TCGContext *s, const TCGOpDef *def,
1613: const TCGArg *args,
1.1.1.6 root 1614: unsigned int dead_args)
1.1 root 1615: {
1616: TCGTemp *ts, *ots;
1617: int reg;
1618: const TCGArgConstraint *arg_ct;
1619:
1620: ots = &s->temps[args[0]];
1621: ts = &s->temps[args[1]];
1622: arg_ct = &def->args_ct[0];
1623:
1.1.1.6 root 1624: /* XXX: always mark arg dead if IS_DEAD_ARG(1) */
1.1 root 1625: if (ts->val_type == TEMP_VAL_REG) {
1.1.1.6 root 1626: if (IS_DEAD_ARG(1) && !ts->fixed_reg && !ots->fixed_reg) {
1.1 root 1627: /* the mov can be suppressed */
1628: if (ots->val_type == TEMP_VAL_REG)
1629: s->reg_to_temp[ots->reg] = -1;
1630: reg = ts->reg;
1631: s->reg_to_temp[reg] = -1;
1632: ts->val_type = TEMP_VAL_DEAD;
1633: } else {
1634: if (ots->val_type == TEMP_VAL_REG) {
1635: reg = ots->reg;
1636: } else {
1637: reg = tcg_reg_alloc(s, arg_ct->u.regs, s->reserved_regs);
1638: }
1639: if (ts->reg != reg) {
1.1.1.4 root 1640: tcg_out_mov(s, ots->type, reg, ts->reg);
1.1 root 1641: }
1642: }
1643: } else if (ts->val_type == TEMP_VAL_MEM) {
1644: if (ots->val_type == TEMP_VAL_REG) {
1645: reg = ots->reg;
1646: } else {
1647: reg = tcg_reg_alloc(s, arg_ct->u.regs, s->reserved_regs);
1648: }
1649: tcg_out_ld(s, ts->type, reg, ts->mem_reg, ts->mem_offset);
1650: } else if (ts->val_type == TEMP_VAL_CONST) {
1651: if (ots->fixed_reg) {
1652: reg = ots->reg;
1653: tcg_out_movi(s, ots->type, reg, ts->val);
1654: } else {
1655: /* propagate constant */
1656: if (ots->val_type == TEMP_VAL_REG)
1657: s->reg_to_temp[ots->reg] = -1;
1658: ots->val_type = TEMP_VAL_CONST;
1659: ots->val = ts->val;
1660: return;
1661: }
1662: } else {
1663: tcg_abort();
1664: }
1665: s->reg_to_temp[reg] = args[0];
1666: ots->reg = reg;
1667: ots->val_type = TEMP_VAL_REG;
1668: ots->mem_coherent = 0;
1669: }
1670:
1671: static void tcg_reg_alloc_op(TCGContext *s,
1.1.1.4 root 1672: const TCGOpDef *def, TCGOpcode opc,
1.1 root 1673: const TCGArg *args,
1.1.1.6 root 1674: unsigned int dead_args)
1.1 root 1675: {
1676: TCGRegSet allocated_regs;
1677: int i, k, nb_iargs, nb_oargs, reg;
1678: TCGArg arg;
1679: const TCGArgConstraint *arg_ct;
1680: TCGTemp *ts;
1681: TCGArg new_args[TCG_MAX_OP_ARGS];
1682: int const_args[TCG_MAX_OP_ARGS];
1683:
1684: nb_oargs = def->nb_oargs;
1685: nb_iargs = def->nb_iargs;
1686:
1687: /* copy constants */
1688: memcpy(new_args + nb_oargs + nb_iargs,
1689: args + nb_oargs + nb_iargs,
1690: sizeof(TCGArg) * def->nb_cargs);
1691:
1692: /* satisfy input constraints */
1693: tcg_regset_set(allocated_regs, s->reserved_regs);
1694: for(k = 0; k < nb_iargs; k++) {
1695: i = def->sorted_args[nb_oargs + k];
1696: arg = args[i];
1697: arg_ct = &def->args_ct[i];
1698: ts = &s->temps[arg];
1699: if (ts->val_type == TEMP_VAL_MEM) {
1700: reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs);
1701: tcg_out_ld(s, ts->type, reg, ts->mem_reg, ts->mem_offset);
1702: ts->val_type = TEMP_VAL_REG;
1703: ts->reg = reg;
1704: ts->mem_coherent = 1;
1705: s->reg_to_temp[reg] = arg;
1706: } else if (ts->val_type == TEMP_VAL_CONST) {
1707: if (tcg_target_const_match(ts->val, arg_ct)) {
1708: /* constant is OK for instruction */
1709: const_args[i] = 1;
1710: new_args[i] = ts->val;
1711: goto iarg_end;
1712: } else {
1713: /* need to move to a register */
1714: reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs);
1715: tcg_out_movi(s, ts->type, reg, ts->val);
1716: ts->val_type = TEMP_VAL_REG;
1717: ts->reg = reg;
1718: ts->mem_coherent = 0;
1719: s->reg_to_temp[reg] = arg;
1720: }
1721: }
1722: assert(ts->val_type == TEMP_VAL_REG);
1723: if (arg_ct->ct & TCG_CT_IALIAS) {
1724: if (ts->fixed_reg) {
1725: /* if fixed register, we must allocate a new register
1726: if the alias is not the same register */
1727: if (arg != args[arg_ct->alias_index])
1728: goto allocate_in_reg;
1729: } else {
1730: /* if the input is aliased to an output and if it is
1731: not dead after the instruction, we must allocate
1732: a new register and move it */
1.1.1.6 root 1733: if (!IS_DEAD_ARG(i)) {
1.1 root 1734: goto allocate_in_reg;
1.1.1.6 root 1735: }
1.1 root 1736: }
1737: }
1738: reg = ts->reg;
1739: if (tcg_regset_test_reg(arg_ct->u.regs, reg)) {
1740: /* nothing to do : the constraint is satisfied */
1741: } else {
1742: allocate_in_reg:
1743: /* allocate a new register matching the constraint
1744: and move the temporary register into it */
1745: reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs);
1.1.1.4 root 1746: tcg_out_mov(s, ts->type, reg, ts->reg);
1.1 root 1747: }
1748: new_args[i] = reg;
1749: const_args[i] = 0;
1750: tcg_regset_set_reg(allocated_regs, reg);
1751: iarg_end: ;
1752: }
1753:
1754: if (def->flags & TCG_OPF_BB_END) {
1755: tcg_reg_alloc_bb_end(s, allocated_regs);
1756: } else {
1757: /* mark dead temporaries and free the associated registers */
1.1.1.6 root 1758: for(i = nb_oargs; i < nb_oargs + nb_iargs; i++) {
1759: arg = args[i];
1760: if (IS_DEAD_ARG(i)) {
1.1 root 1761: ts = &s->temps[arg];
1762: if (!ts->fixed_reg) {
1763: if (ts->val_type == TEMP_VAL_REG)
1764: s->reg_to_temp[ts->reg] = -1;
1765: ts->val_type = TEMP_VAL_DEAD;
1766: }
1767: }
1768: }
1769:
1770: if (def->flags & TCG_OPF_CALL_CLOBBER) {
1771: /* XXX: permit generic clobber register list ? */
1772: for(reg = 0; reg < TCG_TARGET_NB_REGS; reg++) {
1773: if (tcg_regset_test_reg(tcg_target_call_clobber_regs, reg)) {
1774: tcg_reg_free(s, reg);
1775: }
1776: }
1777: /* XXX: for load/store we could do that only for the slow path
1778: (i.e. when a memory callback is called) */
1779:
1780: /* store globals and free associated registers (we assume the insn
1781: can modify any global. */
1782: save_globals(s, allocated_regs);
1783: }
1784:
1785: /* satisfy the output constraints */
1786: tcg_regset_set(allocated_regs, s->reserved_regs);
1787: for(k = 0; k < nb_oargs; k++) {
1788: i = def->sorted_args[k];
1789: arg = args[i];
1790: arg_ct = &def->args_ct[i];
1791: ts = &s->temps[arg];
1792: if (arg_ct->ct & TCG_CT_ALIAS) {
1793: reg = new_args[arg_ct->alias_index];
1794: } else {
1795: /* if fixed register, we try to use it */
1796: reg = ts->reg;
1797: if (ts->fixed_reg &&
1798: tcg_regset_test_reg(arg_ct->u.regs, reg)) {
1799: goto oarg_end;
1800: }
1801: reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs);
1802: }
1803: tcg_regset_set_reg(allocated_regs, reg);
1804: /* if a fixed register is used, then a move will be done afterwards */
1805: if (!ts->fixed_reg) {
1806: if (ts->val_type == TEMP_VAL_REG)
1807: s->reg_to_temp[ts->reg] = -1;
1.1.1.6 root 1808: if (IS_DEAD_ARG(i)) {
1809: ts->val_type = TEMP_VAL_DEAD;
1810: } else {
1811: ts->val_type = TEMP_VAL_REG;
1812: ts->reg = reg;
1813: /* temp value is modified, so the value kept in memory is
1814: potentially not the same */
1815: ts->mem_coherent = 0;
1816: s->reg_to_temp[reg] = arg;
1817: }
1.1 root 1818: }
1819: oarg_end:
1820: new_args[i] = reg;
1821: }
1822: }
1823:
1824: /* emit instruction */
1825: tcg_out_op(s, opc, new_args, const_args);
1826:
1827: /* move the outputs in the correct register if needed */
1828: for(i = 0; i < nb_oargs; i++) {
1829: ts = &s->temps[args[i]];
1830: reg = new_args[i];
1831: if (ts->fixed_reg && ts->reg != reg) {
1.1.1.4 root 1832: tcg_out_mov(s, ts->type, ts->reg, reg);
1.1 root 1833: }
1834: }
1835: }
1836:
1837: #ifdef TCG_TARGET_STACK_GROWSUP
1838: #define STACK_DIR(x) (-(x))
1839: #else
1840: #define STACK_DIR(x) (x)
1841: #endif
1842:
1843: static int tcg_reg_alloc_call(TCGContext *s, const TCGOpDef *def,
1.1.1.4 root 1844: TCGOpcode opc, const TCGArg *args,
1.1.1.6 root 1845: unsigned int dead_args)
1.1 root 1846: {
1847: int nb_iargs, nb_oargs, flags, nb_regs, i, reg, nb_params;
1848: TCGArg arg, func_arg;
1849: TCGTemp *ts;
1850: tcg_target_long stack_offset, call_stack_size, func_addr;
1851: int const_func_arg, allocate_args;
1852: TCGRegSet allocated_regs;
1853: const TCGArgConstraint *arg_ct;
1854:
1855: arg = *args++;
1856:
1857: nb_oargs = arg >> 16;
1858: nb_iargs = arg & 0xffff;
1859: nb_params = nb_iargs - 1;
1860:
1861: flags = args[nb_oargs + nb_iargs];
1862:
1863: nb_regs = tcg_target_get_call_iarg_regs_count(flags);
1864: if (nb_regs > nb_params)
1865: nb_regs = nb_params;
1866:
1867: /* assign stack slots first */
1868: call_stack_size = (nb_params - nb_regs) * sizeof(tcg_target_long);
1869: call_stack_size = (call_stack_size + TCG_TARGET_STACK_ALIGN - 1) &
1870: ~(TCG_TARGET_STACK_ALIGN - 1);
1871: allocate_args = (call_stack_size > TCG_STATIC_CALL_ARGS_SIZE);
1872: if (allocate_args) {
1.1.1.6 root 1873: /* XXX: if more than TCG_STATIC_CALL_ARGS_SIZE is needed,
1874: preallocate call stack */
1875: tcg_abort();
1.1 root 1876: }
1877:
1878: stack_offset = TCG_TARGET_CALL_STACK_OFFSET;
1879: for(i = nb_regs; i < nb_params; i++) {
1880: arg = args[nb_oargs + i];
1881: #ifdef TCG_TARGET_STACK_GROWSUP
1882: stack_offset -= sizeof(tcg_target_long);
1883: #endif
1884: if (arg != TCG_CALL_DUMMY_ARG) {
1885: ts = &s->temps[arg];
1886: if (ts->val_type == TEMP_VAL_REG) {
1887: tcg_out_st(s, ts->type, ts->reg, TCG_REG_CALL_STACK, stack_offset);
1888: } else if (ts->val_type == TEMP_VAL_MEM) {
1889: reg = tcg_reg_alloc(s, tcg_target_available_regs[ts->type],
1890: s->reserved_regs);
1891: /* XXX: not correct if reading values from the stack */
1892: tcg_out_ld(s, ts->type, reg, ts->mem_reg, ts->mem_offset);
1893: tcg_out_st(s, ts->type, reg, TCG_REG_CALL_STACK, stack_offset);
1894: } else if (ts->val_type == TEMP_VAL_CONST) {
1895: reg = tcg_reg_alloc(s, tcg_target_available_regs[ts->type],
1896: s->reserved_regs);
1897: /* XXX: sign extend may be needed on some targets */
1898: tcg_out_movi(s, ts->type, reg, ts->val);
1899: tcg_out_st(s, ts->type, reg, TCG_REG_CALL_STACK, stack_offset);
1900: } else {
1901: tcg_abort();
1902: }
1903: }
1904: #ifndef TCG_TARGET_STACK_GROWSUP
1905: stack_offset += sizeof(tcg_target_long);
1906: #endif
1907: }
1908:
1909: /* assign input registers */
1910: tcg_regset_set(allocated_regs, s->reserved_regs);
1911: for(i = 0; i < nb_regs; i++) {
1912: arg = args[nb_oargs + i];
1913: if (arg != TCG_CALL_DUMMY_ARG) {
1914: ts = &s->temps[arg];
1915: reg = tcg_target_call_iarg_regs[i];
1916: tcg_reg_free(s, reg);
1917: if (ts->val_type == TEMP_VAL_REG) {
1918: if (ts->reg != reg) {
1.1.1.4 root 1919: tcg_out_mov(s, ts->type, reg, ts->reg);
1.1 root 1920: }
1921: } else if (ts->val_type == TEMP_VAL_MEM) {
1922: tcg_out_ld(s, ts->type, reg, ts->mem_reg, ts->mem_offset);
1923: } else if (ts->val_type == TEMP_VAL_CONST) {
1924: /* XXX: sign extend ? */
1925: tcg_out_movi(s, ts->type, reg, ts->val);
1926: } else {
1927: tcg_abort();
1928: }
1929: tcg_regset_set_reg(allocated_regs, reg);
1930: }
1931: }
1932:
1933: /* assign function address */
1934: func_arg = args[nb_oargs + nb_iargs - 1];
1935: arg_ct = &def->args_ct[0];
1936: ts = &s->temps[func_arg];
1937: func_addr = ts->val;
1938: const_func_arg = 0;
1939: if (ts->val_type == TEMP_VAL_MEM) {
1940: reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs);
1941: tcg_out_ld(s, ts->type, reg, ts->mem_reg, ts->mem_offset);
1942: func_arg = reg;
1943: tcg_regset_set_reg(allocated_regs, reg);
1944: } else if (ts->val_type == TEMP_VAL_REG) {
1945: reg = ts->reg;
1946: if (!tcg_regset_test_reg(arg_ct->u.regs, reg)) {
1947: reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs);
1.1.1.4 root 1948: tcg_out_mov(s, ts->type, reg, ts->reg);
1.1 root 1949: }
1950: func_arg = reg;
1951: tcg_regset_set_reg(allocated_regs, reg);
1952: } else if (ts->val_type == TEMP_VAL_CONST) {
1953: if (tcg_target_const_match(func_addr, arg_ct)) {
1954: const_func_arg = 1;
1955: func_arg = func_addr;
1956: } else {
1957: reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs);
1958: tcg_out_movi(s, ts->type, reg, func_addr);
1959: func_arg = reg;
1960: tcg_regset_set_reg(allocated_regs, reg);
1961: }
1962: } else {
1963: tcg_abort();
1964: }
1965:
1966:
1967: /* mark dead temporaries and free the associated registers */
1.1.1.6 root 1968: for(i = nb_oargs; i < nb_iargs + nb_oargs; i++) {
1969: arg = args[i];
1970: if (IS_DEAD_ARG(i)) {
1.1 root 1971: ts = &s->temps[arg];
1972: if (!ts->fixed_reg) {
1973: if (ts->val_type == TEMP_VAL_REG)
1974: s->reg_to_temp[ts->reg] = -1;
1975: ts->val_type = TEMP_VAL_DEAD;
1976: }
1977: }
1978: }
1979:
1980: /* clobber call registers */
1981: for(reg = 0; reg < TCG_TARGET_NB_REGS; reg++) {
1982: if (tcg_regset_test_reg(tcg_target_call_clobber_regs, reg)) {
1983: tcg_reg_free(s, reg);
1984: }
1985: }
1986:
1987: /* store globals and free associated registers (we assume the call
1988: can modify any global. */
1.1.1.2 root 1989: if (!(flags & TCG_CALL_CONST)) {
1990: save_globals(s, allocated_regs);
1991: }
1.1 root 1992:
1993: tcg_out_op(s, opc, &func_arg, &const_func_arg);
1994:
1995: /* assign output registers and emit moves if needed */
1996: for(i = 0; i < nb_oargs; i++) {
1997: arg = args[i];
1998: ts = &s->temps[arg];
1999: reg = tcg_target_call_oarg_regs[i];
2000: assert(s->reg_to_temp[reg] == -1);
2001: if (ts->fixed_reg) {
2002: if (ts->reg != reg) {
1.1.1.4 root 2003: tcg_out_mov(s, ts->type, ts->reg, reg);
1.1 root 2004: }
2005: } else {
2006: if (ts->val_type == TEMP_VAL_REG)
2007: s->reg_to_temp[ts->reg] = -1;
1.1.1.6 root 2008: if (IS_DEAD_ARG(i)) {
2009: ts->val_type = TEMP_VAL_DEAD;
2010: } else {
2011: ts->val_type = TEMP_VAL_REG;
2012: ts->reg = reg;
2013: ts->mem_coherent = 0;
2014: s->reg_to_temp[reg] = arg;
2015: }
1.1 root 2016: }
2017: }
2018:
2019: return nb_iargs + nb_oargs + def->nb_cargs + 1;
2020: }
2021:
2022: #ifdef CONFIG_PROFILER
2023:
2024: static int64_t tcg_table_op_count[NB_OPS];
2025:
1.1.1.3 root 2026: static void dump_op_count(void)
1.1 root 2027: {
2028: int i;
2029: FILE *f;
2030: f = fopen("/tmp/op.log", "w");
2031: for(i = INDEX_op_end; i < NB_OPS; i++) {
2032: fprintf(f, "%s %" PRId64 "\n", tcg_op_defs[i].name, tcg_table_op_count[i]);
2033: }
2034: fclose(f);
2035: }
2036: #endif
2037:
2038:
2039: static inline int tcg_gen_code_common(TCGContext *s, uint8_t *gen_code_buf,
2040: long search_pc)
2041: {
1.1.1.4 root 2042: TCGOpcode opc;
2043: int op_index;
1.1 root 2044: const TCGOpDef *def;
1.1.1.6 root 2045: unsigned int dead_args;
1.1 root 2046: const TCGArg *args;
2047:
2048: #ifdef DEBUG_DISAS
2049: if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP))) {
2050: qemu_log("OP:\n");
2051: tcg_dump_ops(s, logfile);
2052: qemu_log("\n");
2053: }
2054: #endif
2055:
1.1.1.7 root 2056: #ifdef USE_TCG_OPTIMIZATIONS
2057: gen_opparam_ptr =
2058: tcg_optimize(s, gen_opc_ptr, gen_opparam_buf, tcg_op_defs);
2059: #endif
2060:
1.1 root 2061: #ifdef CONFIG_PROFILER
2062: s->la_time -= profile_getclock();
2063: #endif
2064: tcg_liveness_analysis(s);
2065: #ifdef CONFIG_PROFILER
2066: s->la_time += profile_getclock();
2067: #endif
2068:
2069: #ifdef DEBUG_DISAS
2070: if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP_OPT))) {
1.1.1.3 root 2071: qemu_log("OP after liveness analysis:\n");
1.1 root 2072: tcg_dump_ops(s, logfile);
2073: qemu_log("\n");
2074: }
2075: #endif
2076:
2077: tcg_reg_alloc_start(s);
2078:
2079: s->code_buf = gen_code_buf;
2080: s->code_ptr = gen_code_buf;
2081:
2082: args = gen_opparam_buf;
2083: op_index = 0;
2084:
2085: for(;;) {
2086: opc = gen_opc_buf[op_index];
2087: #ifdef CONFIG_PROFILER
2088: tcg_table_op_count[opc]++;
2089: #endif
2090: def = &tcg_op_defs[opc];
2091: #if 0
2092: printf("%s: %d %d %d\n", def->name,
2093: def->nb_oargs, def->nb_iargs, def->nb_cargs);
2094: // dump_regs(s);
2095: #endif
2096: switch(opc) {
2097: case INDEX_op_mov_i32:
2098: #if TCG_TARGET_REG_BITS == 64
2099: case INDEX_op_mov_i64:
2100: #endif
1.1.1.6 root 2101: dead_args = s->op_dead_args[op_index];
2102: tcg_reg_alloc_mov(s, def, args, dead_args);
1.1 root 2103: break;
2104: case INDEX_op_movi_i32:
2105: #if TCG_TARGET_REG_BITS == 64
2106: case INDEX_op_movi_i64:
2107: #endif
2108: tcg_reg_alloc_movi(s, args);
2109: break;
2110: case INDEX_op_debug_insn_start:
2111: /* debug instruction */
2112: break;
2113: case INDEX_op_nop:
2114: case INDEX_op_nop1:
2115: case INDEX_op_nop2:
2116: case INDEX_op_nop3:
2117: break;
2118: case INDEX_op_nopn:
2119: args += args[0];
2120: goto next;
2121: case INDEX_op_discard:
2122: {
2123: TCGTemp *ts;
2124: ts = &s->temps[args[0]];
2125: /* mark the temporary as dead */
2126: if (!ts->fixed_reg) {
2127: if (ts->val_type == TEMP_VAL_REG)
2128: s->reg_to_temp[ts->reg] = -1;
2129: ts->val_type = TEMP_VAL_DEAD;
2130: }
2131: }
2132: break;
2133: case INDEX_op_set_label:
2134: tcg_reg_alloc_bb_end(s, s->reserved_regs);
1.1.1.8 ! root 2135: tcg_out_label(s, args[0], s->code_ptr);
1.1 root 2136: break;
2137: case INDEX_op_call:
1.1.1.6 root 2138: dead_args = s->op_dead_args[op_index];
2139: args += tcg_reg_alloc_call(s, def, opc, args, dead_args);
1.1 root 2140: goto next;
2141: case INDEX_op_end:
2142: goto the_end;
2143: default:
1.1.1.7 root 2144: /* Sanity check that we've not introduced any unhandled opcodes. */
2145: if (def->flags & TCG_OPF_NOT_PRESENT) {
2146: tcg_abort();
2147: }
1.1 root 2148: /* Note: in order to speed up the code, it would be much
2149: faster to have specialized register allocator functions for
2150: some common argument patterns */
1.1.1.6 root 2151: dead_args = s->op_dead_args[op_index];
2152: tcg_reg_alloc_op(s, def, opc, args, dead_args);
1.1 root 2153: break;
2154: }
2155: args += def->nb_args;
2156: next:
2157: if (search_pc >= 0 && search_pc < s->code_ptr - gen_code_buf) {
2158: return op_index;
2159: }
2160: op_index++;
2161: #ifndef NDEBUG
2162: check_regs(s);
2163: #endif
2164: }
2165: the_end:
2166: return -1;
2167: }
2168:
2169: int tcg_gen_code(TCGContext *s, uint8_t *gen_code_buf)
2170: {
2171: #ifdef CONFIG_PROFILER
2172: {
2173: int n;
2174: n = (gen_opc_ptr - gen_opc_buf);
2175: s->op_count += n;
2176: if (n > s->op_count_max)
2177: s->op_count_max = n;
2178:
2179: s->temp_count += s->nb_temps;
2180: if (s->nb_temps > s->temp_count_max)
2181: s->temp_count_max = s->nb_temps;
2182: }
2183: #endif
2184:
2185: tcg_gen_code_common(s, gen_code_buf, -1);
2186:
2187: /* flush instruction cache */
1.1.1.8 ! root 2188: flush_icache_range((tcg_target_ulong)gen_code_buf,
! 2189: (tcg_target_ulong)s->code_ptr);
! 2190:
1.1 root 2191: return s->code_ptr - gen_code_buf;
2192: }
2193:
2194: /* Return the index of the micro operation such as the pc after is <
2195: offset bytes from the start of the TB. The contents of gen_code_buf must
2196: not be changed, though writing the same values is ok.
2197: Return -1 if not found. */
2198: int tcg_gen_code_search_pc(TCGContext *s, uint8_t *gen_code_buf, long offset)
2199: {
2200: return tcg_gen_code_common(s, gen_code_buf, offset);
2201: }
2202:
2203: #ifdef CONFIG_PROFILER
1.1.1.5 root 2204: void tcg_dump_info(FILE *f, fprintf_function cpu_fprintf)
1.1 root 2205: {
2206: TCGContext *s = &tcg_ctx;
2207: int64_t tot;
2208:
2209: tot = s->interm_time + s->code_time;
2210: cpu_fprintf(f, "JIT cycles %" PRId64 " (%0.3f s at 2.4 GHz)\n",
2211: tot, tot / 2.4e9);
2212: cpu_fprintf(f, "translated TBs %" PRId64 " (aborted=%" PRId64 " %0.1f%%)\n",
2213: s->tb_count,
2214: s->tb_count1 - s->tb_count,
2215: s->tb_count1 ? (double)(s->tb_count1 - s->tb_count) / s->tb_count1 * 100.0 : 0);
2216: cpu_fprintf(f, "avg ops/TB %0.1f max=%d\n",
2217: s->tb_count ? (double)s->op_count / s->tb_count : 0, s->op_count_max);
2218: cpu_fprintf(f, "deleted ops/TB %0.2f\n",
2219: s->tb_count ?
2220: (double)s->del_op_count / s->tb_count : 0);
2221: cpu_fprintf(f, "avg temps/TB %0.2f max=%d\n",
2222: s->tb_count ?
2223: (double)s->temp_count / s->tb_count : 0,
2224: s->temp_count_max);
2225:
2226: cpu_fprintf(f, "cycles/op %0.1f\n",
2227: s->op_count ? (double)tot / s->op_count : 0);
2228: cpu_fprintf(f, "cycles/in byte %0.1f\n",
2229: s->code_in_len ? (double)tot / s->code_in_len : 0);
2230: cpu_fprintf(f, "cycles/out byte %0.1f\n",
2231: s->code_out_len ? (double)tot / s->code_out_len : 0);
2232: if (tot == 0)
2233: tot = 1;
2234: cpu_fprintf(f, " gen_interm time %0.1f%%\n",
2235: (double)s->interm_time / tot * 100.0);
2236: cpu_fprintf(f, " gen_code time %0.1f%%\n",
2237: (double)s->code_time / tot * 100.0);
2238: cpu_fprintf(f, "liveness/code time %0.1f%%\n",
2239: (double)s->la_time / (s->code_time ? s->code_time : 1) * 100.0);
2240: cpu_fprintf(f, "cpu_restore count %" PRId64 "\n",
2241: s->restore_count);
2242: cpu_fprintf(f, " avg cycles %0.1f\n",
2243: s->restore_count ? (double)s->restore_time / s->restore_count : 0);
1.1.1.3 root 2244:
2245: dump_op_count();
1.1 root 2246: }
2247: #else
1.1.1.5 root 2248: void tcg_dump_info(FILE *f, fprintf_function cpu_fprintf)
1.1 root 2249: {
2250: cpu_fprintf(f, "[TCG profiler not compiled]\n");
2251: }
2252: #endif
1.1.1.8 ! root 2253:
! 2254: #ifdef ELF_HOST_MACHINE
! 2255: /* In order to use this feature, the backend needs to do three things:
! 2256:
! 2257: (1) Define ELF_HOST_MACHINE to indicate both what value to
! 2258: put into the ELF image and to indicate support for the feature.
! 2259:
! 2260: (2) Define tcg_register_jit. This should create a buffer containing
! 2261: the contents of a .debug_frame section that describes the post-
! 2262: prologue unwind info for the tcg machine.
! 2263:
! 2264: (3) Call tcg_register_jit_int, with the constructed .debug_frame.
! 2265: */
! 2266:
! 2267: /* Begin GDB interface. THE FOLLOWING MUST MATCH GDB DOCS. */
! 2268: typedef enum {
! 2269: JIT_NOACTION = 0,
! 2270: JIT_REGISTER_FN,
! 2271: JIT_UNREGISTER_FN
! 2272: } jit_actions_t;
! 2273:
! 2274: struct jit_code_entry {
! 2275: struct jit_code_entry *next_entry;
! 2276: struct jit_code_entry *prev_entry;
! 2277: const void *symfile_addr;
! 2278: uint64_t symfile_size;
! 2279: };
! 2280:
! 2281: struct jit_descriptor {
! 2282: uint32_t version;
! 2283: uint32_t action_flag;
! 2284: struct jit_code_entry *relevant_entry;
! 2285: struct jit_code_entry *first_entry;
! 2286: };
! 2287:
! 2288: void __jit_debug_register_code(void) __attribute__((noinline));
! 2289: void __jit_debug_register_code(void)
! 2290: {
! 2291: asm("");
! 2292: }
! 2293:
! 2294: /* Must statically initialize the version, because GDB may check
! 2295: the version before we can set it. */
! 2296: struct jit_descriptor __jit_debug_descriptor = { 1, 0, 0, 0 };
! 2297:
! 2298: /* End GDB interface. */
! 2299:
! 2300: static int find_string(const char *strtab, const char *str)
! 2301: {
! 2302: const char *p = strtab + 1;
! 2303:
! 2304: while (1) {
! 2305: if (strcmp(p, str) == 0) {
! 2306: return p - strtab;
! 2307: }
! 2308: p += strlen(p) + 1;
! 2309: }
! 2310: }
! 2311:
! 2312: static void tcg_register_jit_int(void *buf_ptr, size_t buf_size,
! 2313: void *debug_frame, size_t debug_frame_size)
! 2314: {
! 2315: struct __attribute__((packed)) DebugInfo {
! 2316: uint32_t len;
! 2317: uint16_t version;
! 2318: uint32_t abbrev;
! 2319: uint8_t ptr_size;
! 2320: uint8_t cu_die;
! 2321: uint16_t cu_lang;
! 2322: uintptr_t cu_low_pc;
! 2323: uintptr_t cu_high_pc;
! 2324: uint8_t fn_die;
! 2325: char fn_name[16];
! 2326: uintptr_t fn_low_pc;
! 2327: uintptr_t fn_high_pc;
! 2328: uint8_t cu_eoc;
! 2329: };
! 2330:
! 2331: struct ElfImage {
! 2332: ElfW(Ehdr) ehdr;
! 2333: ElfW(Phdr) phdr;
! 2334: ElfW(Shdr) shdr[7];
! 2335: ElfW(Sym) sym[2];
! 2336: struct DebugInfo di;
! 2337: uint8_t da[24];
! 2338: char str[80];
! 2339: };
! 2340:
! 2341: struct ElfImage *img;
! 2342:
! 2343: static const struct ElfImage img_template = {
! 2344: .ehdr = {
! 2345: .e_ident[EI_MAG0] = ELFMAG0,
! 2346: .e_ident[EI_MAG1] = ELFMAG1,
! 2347: .e_ident[EI_MAG2] = ELFMAG2,
! 2348: .e_ident[EI_MAG3] = ELFMAG3,
! 2349: .e_ident[EI_CLASS] = ELF_CLASS,
! 2350: .e_ident[EI_DATA] = ELF_DATA,
! 2351: .e_ident[EI_VERSION] = EV_CURRENT,
! 2352: .e_type = ET_EXEC,
! 2353: .e_machine = ELF_HOST_MACHINE,
! 2354: .e_version = EV_CURRENT,
! 2355: .e_phoff = offsetof(struct ElfImage, phdr),
! 2356: .e_shoff = offsetof(struct ElfImage, shdr),
! 2357: .e_ehsize = sizeof(ElfW(Shdr)),
! 2358: .e_phentsize = sizeof(ElfW(Phdr)),
! 2359: .e_phnum = 1,
! 2360: .e_shentsize = sizeof(ElfW(Shdr)),
! 2361: .e_shnum = ARRAY_SIZE(img->shdr),
! 2362: .e_shstrndx = ARRAY_SIZE(img->shdr) - 1,
! 2363: #ifdef ELF_HOST_FLAGS
! 2364: .e_flags = ELF_HOST_FLAGS,
! 2365: #endif
! 2366: #ifdef ELF_OSABI
! 2367: .e_ident[EI_OSABI] = ELF_OSABI,
! 2368: #endif
! 2369: },
! 2370: .phdr = {
! 2371: .p_type = PT_LOAD,
! 2372: .p_flags = PF_X,
! 2373: },
! 2374: .shdr = {
! 2375: [0] = { .sh_type = SHT_NULL },
! 2376: /* Trick: The contents of code_gen_buffer are not present in
! 2377: this fake ELF file; that got allocated elsewhere. Therefore
! 2378: we mark .text as SHT_NOBITS (similar to .bss) so that readers
! 2379: will not look for contents. We can record any address. */
! 2380: [1] = { /* .text */
! 2381: .sh_type = SHT_NOBITS,
! 2382: .sh_flags = SHF_EXECINSTR | SHF_ALLOC,
! 2383: },
! 2384: [2] = { /* .debug_info */
! 2385: .sh_type = SHT_PROGBITS,
! 2386: .sh_offset = offsetof(struct ElfImage, di),
! 2387: .sh_size = sizeof(struct DebugInfo),
! 2388: },
! 2389: [3] = { /* .debug_abbrev */
! 2390: .sh_type = SHT_PROGBITS,
! 2391: .sh_offset = offsetof(struct ElfImage, da),
! 2392: .sh_size = sizeof(img->da),
! 2393: },
! 2394: [4] = { /* .debug_frame */
! 2395: .sh_type = SHT_PROGBITS,
! 2396: .sh_offset = sizeof(struct ElfImage),
! 2397: },
! 2398: [5] = { /* .symtab */
! 2399: .sh_type = SHT_SYMTAB,
! 2400: .sh_offset = offsetof(struct ElfImage, sym),
! 2401: .sh_size = sizeof(img->sym),
! 2402: .sh_info = 1,
! 2403: .sh_link = ARRAY_SIZE(img->shdr) - 1,
! 2404: .sh_entsize = sizeof(ElfW(Sym)),
! 2405: },
! 2406: [6] = { /* .strtab */
! 2407: .sh_type = SHT_STRTAB,
! 2408: .sh_offset = offsetof(struct ElfImage, str),
! 2409: .sh_size = sizeof(img->str),
! 2410: }
! 2411: },
! 2412: .sym = {
! 2413: [1] = { /* code_gen_buffer */
! 2414: .st_info = ELF_ST_INFO(STB_GLOBAL, STT_FUNC),
! 2415: .st_shndx = 1,
! 2416: }
! 2417: },
! 2418: .di = {
! 2419: .len = sizeof(struct DebugInfo) - 4,
! 2420: .version = 2,
! 2421: .ptr_size = sizeof(void *),
! 2422: .cu_die = 1,
! 2423: .cu_lang = 0x8001, /* DW_LANG_Mips_Assembler */
! 2424: .fn_die = 2,
! 2425: .fn_name = "code_gen_buffer"
! 2426: },
! 2427: .da = {
! 2428: 1, /* abbrev number (the cu) */
! 2429: 0x11, 1, /* DW_TAG_compile_unit, has children */
! 2430: 0x13, 0x5, /* DW_AT_language, DW_FORM_data2 */
! 2431: 0x11, 0x1, /* DW_AT_low_pc, DW_FORM_addr */
! 2432: 0x12, 0x1, /* DW_AT_high_pc, DW_FORM_addr */
! 2433: 0, 0, /* end of abbrev */
! 2434: 2, /* abbrev number (the fn) */
! 2435: 0x2e, 0, /* DW_TAG_subprogram, no children */
! 2436: 0x3, 0x8, /* DW_AT_name, DW_FORM_string */
! 2437: 0x11, 0x1, /* DW_AT_low_pc, DW_FORM_addr */
! 2438: 0x12, 0x1, /* DW_AT_high_pc, DW_FORM_addr */
! 2439: 0, 0, /* end of abbrev */
! 2440: 0 /* no more abbrev */
! 2441: },
! 2442: .str = "\0" ".text\0" ".debug_info\0" ".debug_abbrev\0"
! 2443: ".debug_frame\0" ".symtab\0" ".strtab\0" "code_gen_buffer",
! 2444: };
! 2445:
! 2446: /* We only need a single jit entry; statically allocate it. */
! 2447: static struct jit_code_entry one_entry;
! 2448:
! 2449: uintptr_t buf = (uintptr_t)buf_ptr;
! 2450: size_t img_size = sizeof(struct ElfImage) + debug_frame_size;
! 2451:
! 2452: img = g_malloc(img_size);
! 2453: *img = img_template;
! 2454: memcpy(img + 1, debug_frame, debug_frame_size);
! 2455:
! 2456: img->phdr.p_vaddr = buf;
! 2457: img->phdr.p_paddr = buf;
! 2458: img->phdr.p_memsz = buf_size;
! 2459:
! 2460: img->shdr[1].sh_name = find_string(img->str, ".text");
! 2461: img->shdr[1].sh_addr = buf;
! 2462: img->shdr[1].sh_size = buf_size;
! 2463:
! 2464: img->shdr[2].sh_name = find_string(img->str, ".debug_info");
! 2465: img->shdr[3].sh_name = find_string(img->str, ".debug_abbrev");
! 2466:
! 2467: img->shdr[4].sh_name = find_string(img->str, ".debug_frame");
! 2468: img->shdr[4].sh_size = debug_frame_size;
! 2469:
! 2470: img->shdr[5].sh_name = find_string(img->str, ".symtab");
! 2471: img->shdr[6].sh_name = find_string(img->str, ".strtab");
! 2472:
! 2473: img->sym[1].st_name = find_string(img->str, "code_gen_buffer");
! 2474: img->sym[1].st_value = buf;
! 2475: img->sym[1].st_size = buf_size;
! 2476:
! 2477: img->di.cu_low_pc = buf;
! 2478: img->di.cu_high_pc = buf_size;
! 2479: img->di.fn_low_pc = buf;
! 2480: img->di.fn_high_pc = buf_size;
! 2481:
! 2482: #ifdef DEBUG_JIT
! 2483: /* Enable this block to be able to debug the ELF image file creation.
! 2484: One can use readelf, objdump, or other inspection utilities. */
! 2485: {
! 2486: FILE *f = fopen("/tmp/qemu.jit", "w+b");
! 2487: if (f) {
! 2488: if (fwrite(img, img_size, 1, f) != img_size) {
! 2489: /* Avoid stupid unused return value warning for fwrite. */
! 2490: }
! 2491: fclose(f);
! 2492: }
! 2493: }
! 2494: #endif
! 2495:
! 2496: one_entry.symfile_addr = img;
! 2497: one_entry.symfile_size = img_size;
! 2498:
! 2499: __jit_debug_descriptor.action_flag = JIT_REGISTER_FN;
! 2500: __jit_debug_descriptor.relevant_entry = &one_entry;
! 2501: __jit_debug_descriptor.first_entry = &one_entry;
! 2502: __jit_debug_register_code();
! 2503: }
! 2504: #else
! 2505: /* No support for the feature. Provide the entry point expected by exec.c,
! 2506: and implement the internal function we declared earlier. */
! 2507:
! 2508: static void tcg_register_jit_int(void *buf, size_t size,
! 2509: void *debug_frame, size_t debug_frame_size)
! 2510: {
! 2511: }
! 2512:
! 2513: void tcg_register_jit(void *buf, size_t buf_size)
! 2514: {
! 2515: }
! 2516: #endif /* ELF_HOST_MACHINE */
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