dt_cg.c revision 178479
1178479Sjb/* 2178479Sjb * CDDL HEADER START 3178479Sjb * 4178479Sjb * The contents of this file are subject to the terms of the 5178479Sjb * Common Development and Distribution License, Version 1.0 only 6178479Sjb * (the "License"). You may not use this file except in compliance 7178479Sjb * with the License. 8178479Sjb * 9178479Sjb * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10178479Sjb * or http://www.opensolaris.org/os/licensing. 11178479Sjb * See the License for the specific language governing permissions 12178479Sjb * and limitations under the License. 13178479Sjb * 14178479Sjb * When distributing Covered Code, include this CDDL HEADER in each 15178479Sjb * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16178479Sjb * If applicable, add the following below this CDDL HEADER, with the 17178479Sjb * fields enclosed by brackets "[]" replaced with your own identifying 18178479Sjb * information: Portions Copyright [yyyy] [name of copyright owner] 19178479Sjb * 20178479Sjb * CDDL HEADER END 21178479Sjb */ 22178479Sjb/* 23178479Sjb * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 24178479Sjb * Use is subject to license terms. 25178479Sjb */ 26178479Sjb 27178479Sjb#pragma ident "%Z%%M% %I% %E% SMI" 28178479Sjb 29178479Sjb#include <sys/types.h> 30178479Sjb#include <sys/sysmacros.h> 31178479Sjb#include <sys/isa_defs.h> 32178479Sjb 33178479Sjb#include <strings.h> 34178479Sjb#include <stdlib.h> 35178479Sjb#include <setjmp.h> 36178479Sjb#include <assert.h> 37178479Sjb#include <errno.h> 38178479Sjb 39178479Sjb#include <dt_impl.h> 40178479Sjb#include <dt_grammar.h> 41178479Sjb#include <dt_parser.h> 42178479Sjb#include <dt_provider.h> 43178479Sjb 44178479Sjbstatic void dt_cg_node(dt_node_t *, dt_irlist_t *, dt_regset_t *); 45178479Sjb 46178479Sjbstatic dt_irnode_t * 47178479Sjbdt_cg_node_alloc(uint_t label, dif_instr_t instr) 48178479Sjb{ 49178479Sjb dt_irnode_t *dip = malloc(sizeof (dt_irnode_t)); 50178479Sjb 51178479Sjb if (dip == NULL) 52178479Sjb longjmp(yypcb->pcb_jmpbuf, EDT_NOMEM); 53178479Sjb 54178479Sjb dip->di_label = label; 55178479Sjb dip->di_instr = instr; 56178479Sjb dip->di_extern = NULL; 57178479Sjb dip->di_next = NULL; 58178479Sjb 59178479Sjb return (dip); 60178479Sjb} 61178479Sjb 62178479Sjb/* 63178479Sjb * Code generator wrapper function for ctf_member_info. If we are given a 64178479Sjb * reference to a forward declaration tag, search the entire type space for 65178479Sjb * the actual definition and then call ctf_member_info on the result. 66178479Sjb */ 67178479Sjbstatic ctf_file_t * 68178479Sjbdt_cg_membinfo(ctf_file_t *fp, ctf_id_t type, const char *s, ctf_membinfo_t *mp) 69178479Sjb{ 70178479Sjb while (ctf_type_kind(fp, type) == CTF_K_FORWARD) { 71178479Sjb char n[DT_TYPE_NAMELEN]; 72178479Sjb dtrace_typeinfo_t dtt; 73178479Sjb 74178479Sjb if (ctf_type_name(fp, type, n, sizeof (n)) == NULL || 75178479Sjb dt_type_lookup(n, &dtt) == -1 || ( 76178479Sjb dtt.dtt_ctfp == fp && dtt.dtt_type == type)) 77178479Sjb break; /* unable to improve our position */ 78178479Sjb 79178479Sjb fp = dtt.dtt_ctfp; 80178479Sjb type = ctf_type_resolve(fp, dtt.dtt_type); 81178479Sjb } 82178479Sjb 83178479Sjb if (ctf_member_info(fp, type, s, mp) == CTF_ERR) 84178479Sjb return (NULL); /* ctf_errno is set for us */ 85178479Sjb 86178479Sjb return (fp); 87178479Sjb} 88178479Sjb 89178479Sjbstatic void 90178479Sjbdt_cg_xsetx(dt_irlist_t *dlp, dt_ident_t *idp, uint_t lbl, int reg, uint64_t x) 91178479Sjb{ 92178479Sjb int flag = idp != NULL ? DT_INT_PRIVATE : DT_INT_SHARED; 93178479Sjb int intoff = dt_inttab_insert(yypcb->pcb_inttab, x, flag); 94178479Sjb dif_instr_t instr = DIF_INSTR_SETX((uint_t)intoff, reg); 95178479Sjb 96178479Sjb if (intoff == -1) 97178479Sjb longjmp(yypcb->pcb_jmpbuf, EDT_NOMEM); 98178479Sjb 99178479Sjb if (intoff > DIF_INTOFF_MAX) 100178479Sjb longjmp(yypcb->pcb_jmpbuf, EDT_INT2BIG); 101178479Sjb 102178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(lbl, instr)); 103178479Sjb 104178479Sjb if (idp != NULL) 105178479Sjb dlp->dl_last->di_extern = idp; 106178479Sjb} 107178479Sjb 108178479Sjbstatic void 109178479Sjbdt_cg_setx(dt_irlist_t *dlp, int reg, uint64_t x) 110178479Sjb{ 111178479Sjb dt_cg_xsetx(dlp, NULL, DT_LBL_NONE, reg, x); 112178479Sjb} 113178479Sjb 114178479Sjb/* 115178479Sjb * When loading bit-fields, we want to convert a byte count in the range 116178479Sjb * 1-8 to the closest power of 2 (e.g. 3->4, 5->8, etc). The clp2() function 117178479Sjb * is a clever implementation from "Hacker's Delight" by Henry Warren, Jr. 118178479Sjb */ 119178479Sjbstatic size_t 120178479Sjbclp2(size_t x) 121178479Sjb{ 122178479Sjb x--; 123178479Sjb 124178479Sjb x |= (x >> 1); 125178479Sjb x |= (x >> 2); 126178479Sjb x |= (x >> 4); 127178479Sjb x |= (x >> 8); 128178479Sjb x |= (x >> 16); 129178479Sjb 130178479Sjb return (x + 1); 131178479Sjb} 132178479Sjb 133178479Sjb/* 134178479Sjb * Lookup the correct load opcode to use for the specified node and CTF type. 135178479Sjb * We determine the size and convert it to a 3-bit index. Our lookup table 136178479Sjb * is constructed to use a 5-bit index, consisting of the 3-bit size 0-7, a 137178479Sjb * bit for the sign, and a bit for userland address. For example, a 4-byte 138178479Sjb * signed load from userland would be at the following table index: 139178479Sjb * user=1 sign=1 size=4 => binary index 11011 = decimal index 27 140178479Sjb */ 141178479Sjbstatic uint_t 142178479Sjbdt_cg_load(dt_node_t *dnp, ctf_file_t *ctfp, ctf_id_t type) 143178479Sjb{ 144178479Sjb static const uint_t ops[] = { 145178479Sjb DIF_OP_LDUB, DIF_OP_LDUH, 0, DIF_OP_LDUW, 146178479Sjb 0, 0, 0, DIF_OP_LDX, 147178479Sjb DIF_OP_LDSB, DIF_OP_LDSH, 0, DIF_OP_LDSW, 148178479Sjb 0, 0, 0, DIF_OP_LDX, 149178479Sjb DIF_OP_ULDUB, DIF_OP_ULDUH, 0, DIF_OP_ULDUW, 150178479Sjb 0, 0, 0, DIF_OP_ULDX, 151178479Sjb DIF_OP_ULDSB, DIF_OP_ULDSH, 0, DIF_OP_ULDSW, 152178479Sjb 0, 0, 0, DIF_OP_ULDX, 153178479Sjb }; 154178479Sjb 155178479Sjb ctf_encoding_t e; 156178479Sjb ssize_t size; 157178479Sjb 158178479Sjb /* 159178479Sjb * If we're loading a bit-field, the size of our load is found by 160178479Sjb * rounding cte_bits up to a byte boundary and then finding the 161178479Sjb * nearest power of two to this value (see clp2(), above). 162178479Sjb */ 163178479Sjb if ((dnp->dn_flags & DT_NF_BITFIELD) && 164178479Sjb ctf_type_encoding(ctfp, type, &e) != CTF_ERR) 165178479Sjb size = clp2(P2ROUNDUP(e.cte_bits, NBBY) / NBBY); 166178479Sjb else 167178479Sjb size = ctf_type_size(ctfp, type); 168178479Sjb 169178479Sjb if (size < 1 || size > 8 || (size & (size - 1)) != 0) { 170178479Sjb xyerror(D_UNKNOWN, "internal error -- cg cannot load " 171178479Sjb "size %ld when passed by value\n", (long)size); 172178479Sjb } 173178479Sjb 174178479Sjb size--; /* convert size to 3-bit index */ 175178479Sjb 176178479Sjb if (dnp->dn_flags & DT_NF_SIGNED) 177178479Sjb size |= 0x08; 178178479Sjb if (dnp->dn_flags & DT_NF_USERLAND) 179178479Sjb size |= 0x10; 180178479Sjb 181178479Sjb return (ops[size]); 182178479Sjb} 183178479Sjb 184178479Sjbstatic void 185178479Sjbdt_cg_ptrsize(dt_node_t *dnp, dt_irlist_t *dlp, dt_regset_t *drp, 186178479Sjb uint_t op, int dreg) 187178479Sjb{ 188178479Sjb ctf_file_t *ctfp = dnp->dn_ctfp; 189178479Sjb ctf_arinfo_t r; 190178479Sjb dif_instr_t instr; 191178479Sjb ctf_id_t type; 192178479Sjb uint_t kind; 193178479Sjb ssize_t size; 194178479Sjb int sreg; 195178479Sjb 196178479Sjb if ((sreg = dt_regset_alloc(drp)) == -1) 197178479Sjb longjmp(yypcb->pcb_jmpbuf, EDT_NOREG); 198178479Sjb 199178479Sjb type = ctf_type_resolve(ctfp, dnp->dn_type); 200178479Sjb kind = ctf_type_kind(ctfp, type); 201178479Sjb assert(kind == CTF_K_POINTER || kind == CTF_K_ARRAY); 202178479Sjb 203178479Sjb if (kind == CTF_K_ARRAY) { 204178479Sjb if (ctf_array_info(ctfp, type, &r) != 0) { 205178479Sjb yypcb->pcb_hdl->dt_ctferr = ctf_errno(ctfp); 206178479Sjb longjmp(yypcb->pcb_jmpbuf, EDT_CTF); 207178479Sjb } 208178479Sjb type = r.ctr_contents; 209178479Sjb } else 210178479Sjb type = ctf_type_reference(ctfp, type); 211178479Sjb 212178479Sjb if ((size = ctf_type_size(ctfp, type)) == 1) 213178479Sjb return; /* multiply or divide by one can be omitted */ 214178479Sjb 215178479Sjb dt_cg_setx(dlp, sreg, size); 216178479Sjb instr = DIF_INSTR_FMT(op, dreg, sreg, dreg); 217178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 218178479Sjb dt_regset_free(drp, sreg); 219178479Sjb} 220178479Sjb 221178479Sjb/* 222178479Sjb * If the result of a "." or "->" operation is a bit-field, we use this routine 223178479Sjb * to generate an epilogue to the load instruction that extracts the value. In 224178479Sjb * the diagrams below the "ld??" is the load instruction that is generated to 225178479Sjb * load the containing word that is generating prior to calling this function. 226178479Sjb * 227178479Sjb * Epilogue for unsigned fields: Epilogue for signed fields: 228178479Sjb * 229178479Sjb * ldu? [r1], r1 lds? [r1], r1 230178479Sjb * setx USHIFT, r2 setx 64 - SSHIFT, r2 231178479Sjb * srl r1, r2, r1 sll r1, r2, r1 232178479Sjb * setx (1 << bits) - 1, r2 setx 64 - bits, r2 233178479Sjb * and r1, r2, r1 sra r1, r2, r1 234178479Sjb * 235178479Sjb * The *SHIFT constants above changes value depending on the endian-ness of our 236178479Sjb * target architecture. Refer to the comments below for more details. 237178479Sjb */ 238178479Sjbstatic void 239178479Sjbdt_cg_field_get(dt_node_t *dnp, dt_irlist_t *dlp, dt_regset_t *drp, 240178479Sjb ctf_file_t *fp, const ctf_membinfo_t *mp) 241178479Sjb{ 242178479Sjb ctf_encoding_t e; 243178479Sjb dif_instr_t instr; 244178479Sjb uint64_t shift; 245178479Sjb int r1, r2; 246178479Sjb 247178479Sjb if (ctf_type_encoding(fp, mp->ctm_type, &e) != 0 || e.cte_bits > 64) { 248178479Sjb xyerror(D_UNKNOWN, "cg: bad field: off %lu type <%ld> " 249178479Sjb "bits %u\n", mp->ctm_offset, mp->ctm_type, e.cte_bits); 250178479Sjb } 251178479Sjb 252178479Sjb assert(dnp->dn_op == DT_TOK_PTR || dnp->dn_op == DT_TOK_DOT); 253178479Sjb r1 = dnp->dn_left->dn_reg; 254178479Sjb 255178479Sjb if ((r2 = dt_regset_alloc(drp)) == -1) 256178479Sjb longjmp(yypcb->pcb_jmpbuf, EDT_NOREG); 257178479Sjb 258178479Sjb /* 259178479Sjb * On little-endian architectures, ctm_offset counts from the right so 260178479Sjb * ctm_offset % NBBY itself is the amount we want to shift right to 261178479Sjb * move the value bits to the little end of the register to mask them. 262178479Sjb * On big-endian architectures, ctm_offset counts from the left so we 263178479Sjb * must subtract (ctm_offset % NBBY + cte_bits) from the size in bits 264178479Sjb * we used for the load. The size of our load in turn is found by 265178479Sjb * rounding cte_bits up to a byte boundary and then finding the 266178479Sjb * nearest power of two to this value (see clp2(), above). These 267178479Sjb * properties are used to compute shift as USHIFT or SSHIFT, below. 268178479Sjb */ 269178479Sjb if (dnp->dn_flags & DT_NF_SIGNED) { 270178479Sjb#if BYTE_ORDER == _BIG_ENDIAN 271178479Sjb shift = clp2(P2ROUNDUP(e.cte_bits, NBBY) / NBBY) * NBBY - 272178479Sjb mp->ctm_offset % NBBY; 273178479Sjb#else 274178479Sjb shift = mp->ctm_offset % NBBY + e.cte_bits; 275178479Sjb#endif 276178479Sjb dt_cg_setx(dlp, r2, 64 - shift); 277178479Sjb instr = DIF_INSTR_FMT(DIF_OP_SLL, r1, r2, r1); 278178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 279178479Sjb 280178479Sjb dt_cg_setx(dlp, r2, 64 - e.cte_bits); 281178479Sjb instr = DIF_INSTR_FMT(DIF_OP_SRA, r1, r2, r1); 282178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 283178479Sjb } else { 284178479Sjb#if BYTE_ORDER == _BIG_ENDIAN 285178479Sjb shift = clp2(P2ROUNDUP(e.cte_bits, NBBY) / NBBY) * NBBY - 286178479Sjb (mp->ctm_offset % NBBY + e.cte_bits); 287178479Sjb#else 288178479Sjb shift = mp->ctm_offset % NBBY; 289178479Sjb#endif 290178479Sjb dt_cg_setx(dlp, r2, shift); 291178479Sjb instr = DIF_INSTR_FMT(DIF_OP_SRL, r1, r2, r1); 292178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 293178479Sjb 294178479Sjb dt_cg_setx(dlp, r2, (1ULL << e.cte_bits) - 1); 295178479Sjb instr = DIF_INSTR_FMT(DIF_OP_AND, r1, r2, r1); 296178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 297178479Sjb } 298178479Sjb 299178479Sjb dt_regset_free(drp, r2); 300178479Sjb} 301178479Sjb 302178479Sjb/* 303178479Sjb * If the destination of a store operation is a bit-field, we use this routine 304178479Sjb * to generate a prologue to the store instruction that loads the surrounding 305178479Sjb * bits, clears the destination field, and ORs in the new value of the field. 306178479Sjb * In the diagram below the "st?" is the store instruction that is generated to 307178479Sjb * store the containing word that is generating after calling this function. 308178479Sjb * 309178479Sjb * ld [dst->dn_reg], r1 310178479Sjb * setx ~(((1 << cte_bits) - 1) << (ctm_offset % NBBY)), r2 311178479Sjb * and r1, r2, r1 312178479Sjb * 313178479Sjb * setx (1 << cte_bits) - 1, r2 314178479Sjb * and src->dn_reg, r2, r2 315178479Sjb * setx ctm_offset % NBBY, r3 316178479Sjb * sll r2, r3, r2 317178479Sjb * 318178479Sjb * or r1, r2, r1 319178479Sjb * st? r1, [dst->dn_reg] 320178479Sjb * 321178479Sjb * This routine allocates a new register to hold the value to be stored and 322178479Sjb * returns it. The caller is responsible for freeing this register later. 323178479Sjb */ 324178479Sjbstatic int 325178479Sjbdt_cg_field_set(dt_node_t *src, dt_irlist_t *dlp, 326178479Sjb dt_regset_t *drp, dt_node_t *dst) 327178479Sjb{ 328178479Sjb uint64_t cmask, fmask, shift; 329178479Sjb dif_instr_t instr; 330178479Sjb int r1, r2, r3; 331178479Sjb 332178479Sjb ctf_membinfo_t m; 333178479Sjb ctf_encoding_t e; 334178479Sjb ctf_file_t *fp, *ofp; 335178479Sjb ctf_id_t type; 336178479Sjb 337178479Sjb assert(dst->dn_op == DT_TOK_PTR || dst->dn_op == DT_TOK_DOT); 338178479Sjb assert(dst->dn_right->dn_kind == DT_NODE_IDENT); 339178479Sjb 340178479Sjb fp = dst->dn_left->dn_ctfp; 341178479Sjb type = ctf_type_resolve(fp, dst->dn_left->dn_type); 342178479Sjb 343178479Sjb if (dst->dn_op == DT_TOK_PTR) { 344178479Sjb type = ctf_type_reference(fp, type); 345178479Sjb type = ctf_type_resolve(fp, type); 346178479Sjb } 347178479Sjb 348178479Sjb if ((fp = dt_cg_membinfo(ofp = fp, type, 349178479Sjb dst->dn_right->dn_string, &m)) == NULL) { 350178479Sjb yypcb->pcb_hdl->dt_ctferr = ctf_errno(ofp); 351178479Sjb longjmp(yypcb->pcb_jmpbuf, EDT_CTF); 352178479Sjb } 353178479Sjb 354178479Sjb if (ctf_type_encoding(fp, m.ctm_type, &e) != 0 || e.cte_bits > 64) { 355178479Sjb xyerror(D_UNKNOWN, "cg: bad field: off %lu type <%ld> " 356178479Sjb "bits %u\n", m.ctm_offset, m.ctm_type, e.cte_bits); 357178479Sjb } 358178479Sjb 359178479Sjb if ((r1 = dt_regset_alloc(drp)) == -1 || 360178479Sjb (r2 = dt_regset_alloc(drp)) == -1 || 361178479Sjb (r3 = dt_regset_alloc(drp)) == -1) 362178479Sjb longjmp(yypcb->pcb_jmpbuf, EDT_NOREG); 363178479Sjb 364178479Sjb /* 365178479Sjb * Compute shifts and masks. We need to compute "shift" as the amount 366178479Sjb * we need to shift left to position our field in the containing word. 367178479Sjb * Refer to the comments in dt_cg_field_get(), above, for more info. 368178479Sjb * We then compute fmask as the mask that truncates the value in the 369178479Sjb * input register to width cte_bits, and cmask as the mask used to 370178479Sjb * pass through the containing bits and zero the field bits. 371178479Sjb */ 372178479Sjb#if BYTE_ORDER == _BIG_ENDIAN 373178479Sjb shift = clp2(P2ROUNDUP(e.cte_bits, NBBY) / NBBY) * NBBY - 374178479Sjb (m.ctm_offset % NBBY + e.cte_bits); 375178479Sjb#else 376178479Sjb shift = m.ctm_offset % NBBY; 377178479Sjb#endif 378178479Sjb fmask = (1ULL << e.cte_bits) - 1; 379178479Sjb cmask = ~(fmask << shift); 380178479Sjb 381178479Sjb instr = DIF_INSTR_LOAD( 382178479Sjb dt_cg_load(dst, fp, m.ctm_type), dst->dn_reg, r1); 383178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 384178479Sjb 385178479Sjb dt_cg_setx(dlp, r2, cmask); 386178479Sjb instr = DIF_INSTR_FMT(DIF_OP_AND, r1, r2, r1); 387178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 388178479Sjb 389178479Sjb dt_cg_setx(dlp, r2, fmask); 390178479Sjb instr = DIF_INSTR_FMT(DIF_OP_AND, src->dn_reg, r2, r2); 391178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 392178479Sjb 393178479Sjb dt_cg_setx(dlp, r3, shift); 394178479Sjb instr = DIF_INSTR_FMT(DIF_OP_SLL, r2, r3, r2); 395178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 396178479Sjb 397178479Sjb instr = DIF_INSTR_FMT(DIF_OP_OR, r1, r2, r1); 398178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 399178479Sjb 400178479Sjb dt_regset_free(drp, r3); 401178479Sjb dt_regset_free(drp, r2); 402178479Sjb 403178479Sjb return (r1); 404178479Sjb} 405178479Sjb 406178479Sjbstatic void 407178479Sjbdt_cg_store(dt_node_t *src, dt_irlist_t *dlp, dt_regset_t *drp, dt_node_t *dst) 408178479Sjb{ 409178479Sjb ctf_encoding_t e; 410178479Sjb dif_instr_t instr; 411178479Sjb size_t size; 412178479Sjb int reg; 413178479Sjb 414178479Sjb /* 415178479Sjb * If we're loading a bit-field, the size of our store is found by 416178479Sjb * rounding dst's cte_bits up to a byte boundary and then finding the 417178479Sjb * nearest power of two to this value (see clp2(), above). 418178479Sjb */ 419178479Sjb if ((dst->dn_flags & DT_NF_BITFIELD) && 420178479Sjb ctf_type_encoding(dst->dn_ctfp, dst->dn_type, &e) != CTF_ERR) 421178479Sjb size = clp2(P2ROUNDUP(e.cte_bits, NBBY) / NBBY); 422178479Sjb else 423178479Sjb size = dt_node_type_size(src); 424178479Sjb 425178479Sjb if (src->dn_flags & DT_NF_REF) { 426178479Sjb if ((reg = dt_regset_alloc(drp)) == -1) 427178479Sjb longjmp(yypcb->pcb_jmpbuf, EDT_NOREG); 428178479Sjb dt_cg_setx(dlp, reg, size); 429178479Sjb instr = DIF_INSTR_COPYS(src->dn_reg, reg, dst->dn_reg); 430178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 431178479Sjb dt_regset_free(drp, reg); 432178479Sjb } else { 433178479Sjb if (dst->dn_flags & DT_NF_BITFIELD) 434178479Sjb reg = dt_cg_field_set(src, dlp, drp, dst); 435178479Sjb else 436178479Sjb reg = src->dn_reg; 437178479Sjb 438178479Sjb switch (size) { 439178479Sjb case 1: 440178479Sjb instr = DIF_INSTR_STORE(DIF_OP_STB, reg, dst->dn_reg); 441178479Sjb break; 442178479Sjb case 2: 443178479Sjb instr = DIF_INSTR_STORE(DIF_OP_STH, reg, dst->dn_reg); 444178479Sjb break; 445178479Sjb case 4: 446178479Sjb instr = DIF_INSTR_STORE(DIF_OP_STW, reg, dst->dn_reg); 447178479Sjb break; 448178479Sjb case 8: 449178479Sjb instr = DIF_INSTR_STORE(DIF_OP_STX, reg, dst->dn_reg); 450178479Sjb break; 451178479Sjb default: 452178479Sjb xyerror(D_UNKNOWN, "internal error -- cg cannot store " 453178479Sjb "size %lu when passed by value\n", (ulong_t)size); 454178479Sjb } 455178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 456178479Sjb 457178479Sjb if (dst->dn_flags & DT_NF_BITFIELD) 458178479Sjb dt_regset_free(drp, reg); 459178479Sjb } 460178479Sjb} 461178479Sjb 462178479Sjb/* 463178479Sjb * Generate code for a typecast or for argument promotion from the type of the 464178479Sjb * actual to the type of the formal. We need to generate code for casts when 465178479Sjb * a scalar type is being narrowed or changing signed-ness. We first shift the 466178479Sjb * desired bits high (losing excess bits if narrowing) and then shift them down 467178479Sjb * using logical shift (unsigned result) or arithmetic shift (signed result). 468178479Sjb */ 469178479Sjbstatic void 470178479Sjbdt_cg_typecast(const dt_node_t *src, const dt_node_t *dst, 471178479Sjb dt_irlist_t *dlp, dt_regset_t *drp) 472178479Sjb{ 473178479Sjb size_t srcsize = dt_node_type_size(src); 474178479Sjb size_t dstsize = dt_node_type_size(dst); 475178479Sjb 476178479Sjb dif_instr_t instr; 477178479Sjb int reg, n; 478178479Sjb 479178479Sjb if (dt_node_is_scalar(dst) && (dstsize < srcsize || 480178479Sjb (src->dn_flags & DT_NF_SIGNED) ^ (dst->dn_flags & DT_NF_SIGNED))) { 481178479Sjb if ((reg = dt_regset_alloc(drp)) == -1) 482178479Sjb longjmp(yypcb->pcb_jmpbuf, EDT_NOREG); 483178479Sjb 484178479Sjb if (dstsize < srcsize) 485178479Sjb n = sizeof (uint64_t) * NBBY - dstsize * NBBY; 486178479Sjb else 487178479Sjb n = sizeof (uint64_t) * NBBY - srcsize * NBBY; 488178479Sjb 489178479Sjb dt_cg_setx(dlp, reg, n); 490178479Sjb 491178479Sjb instr = DIF_INSTR_FMT(DIF_OP_SLL, 492178479Sjb src->dn_reg, reg, dst->dn_reg); 493178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 494178479Sjb 495178479Sjb instr = DIF_INSTR_FMT((dst->dn_flags & DT_NF_SIGNED) ? 496178479Sjb DIF_OP_SRA : DIF_OP_SRL, dst->dn_reg, reg, dst->dn_reg); 497178479Sjb 498178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 499178479Sjb dt_regset_free(drp, reg); 500178479Sjb } 501178479Sjb} 502178479Sjb 503178479Sjb/* 504178479Sjb * Generate code to push the specified argument list on to the tuple stack. 505178479Sjb * We use this routine for handling subroutine calls and associative arrays. 506178479Sjb * We must first generate code for all subexpressions before loading the stack 507178479Sjb * because any subexpression could itself require the use of the tuple stack. 508178479Sjb * This holds a number of registers equal to the number of arguments, but this 509178479Sjb * is not a huge problem because the number of arguments can't exceed the 510178479Sjb * number of tuple register stack elements anyway. At most one extra register 511178479Sjb * is required (either by dt_cg_typecast() or for dtdt_size, below). This 512178479Sjb * implies that a DIF implementation should offer a number of general purpose 513178479Sjb * registers at least one greater than the number of tuple registers. 514178479Sjb */ 515178479Sjbstatic void 516178479Sjbdt_cg_arglist(dt_ident_t *idp, dt_node_t *args, 517178479Sjb dt_irlist_t *dlp, dt_regset_t *drp) 518178479Sjb{ 519178479Sjb const dt_idsig_t *isp = idp->di_data; 520178479Sjb dt_node_t *dnp; 521178479Sjb int i = 0; 522178479Sjb 523178479Sjb for (dnp = args; dnp != NULL; dnp = dnp->dn_list) 524178479Sjb dt_cg_node(dnp, dlp, drp); 525178479Sjb 526178479Sjb dt_irlist_append(dlp, 527178479Sjb dt_cg_node_alloc(DT_LBL_NONE, DIF_INSTR_FLUSHTS)); 528178479Sjb 529178479Sjb for (dnp = args; dnp != NULL; dnp = dnp->dn_list, i++) { 530178479Sjb dtrace_diftype_t t; 531178479Sjb dif_instr_t instr; 532178479Sjb uint_t op; 533178479Sjb int reg; 534178479Sjb 535178479Sjb dt_node_diftype(yypcb->pcb_hdl, dnp, &t); 536178479Sjb 537178479Sjb isp->dis_args[i].dn_reg = dnp->dn_reg; /* re-use register */ 538178479Sjb dt_cg_typecast(dnp, &isp->dis_args[i], dlp, drp); 539178479Sjb isp->dis_args[i].dn_reg = -1; 540178479Sjb 541178479Sjb if (t.dtdt_flags & DIF_TF_BYREF) 542178479Sjb op = DIF_OP_PUSHTR; 543178479Sjb else 544178479Sjb op = DIF_OP_PUSHTV; 545178479Sjb 546178479Sjb if (t.dtdt_size != 0) { 547178479Sjb if ((reg = dt_regset_alloc(drp)) == -1) 548178479Sjb longjmp(yypcb->pcb_jmpbuf, EDT_NOREG); 549178479Sjb dt_cg_setx(dlp, reg, t.dtdt_size); 550178479Sjb } else 551178479Sjb reg = DIF_REG_R0; 552178479Sjb 553178479Sjb instr = DIF_INSTR_PUSHTS(op, t.dtdt_kind, reg, dnp->dn_reg); 554178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 555178479Sjb dt_regset_free(drp, dnp->dn_reg); 556178479Sjb 557178479Sjb if (reg != DIF_REG_R0) 558178479Sjb dt_regset_free(drp, reg); 559178479Sjb } 560178479Sjb 561178479Sjb if (i > yypcb->pcb_hdl->dt_conf.dtc_diftupregs) 562178479Sjb longjmp(yypcb->pcb_jmpbuf, EDT_NOTUPREG); 563178479Sjb} 564178479Sjb 565178479Sjbstatic void 566178479Sjbdt_cg_arithmetic_op(dt_node_t *dnp, dt_irlist_t *dlp, 567178479Sjb dt_regset_t *drp, uint_t op) 568178479Sjb{ 569178479Sjb int is_ptr_op = (dnp->dn_op == DT_TOK_ADD || dnp->dn_op == DT_TOK_SUB || 570178479Sjb dnp->dn_op == DT_TOK_ADD_EQ || dnp->dn_op == DT_TOK_SUB_EQ); 571178479Sjb 572178479Sjb int lp_is_ptr = dt_node_is_pointer(dnp->dn_left); 573178479Sjb int rp_is_ptr = dt_node_is_pointer(dnp->dn_right); 574178479Sjb 575178479Sjb dif_instr_t instr; 576178479Sjb 577178479Sjb if (lp_is_ptr && rp_is_ptr) { 578178479Sjb assert(dnp->dn_op == DT_TOK_SUB); 579178479Sjb is_ptr_op = 0; 580178479Sjb } 581178479Sjb 582178479Sjb dt_cg_node(dnp->dn_left, dlp, drp); 583178479Sjb if (is_ptr_op && rp_is_ptr) 584178479Sjb dt_cg_ptrsize(dnp, dlp, drp, DIF_OP_MUL, dnp->dn_left->dn_reg); 585178479Sjb 586178479Sjb dt_cg_node(dnp->dn_right, dlp, drp); 587178479Sjb if (is_ptr_op && lp_is_ptr) 588178479Sjb dt_cg_ptrsize(dnp, dlp, drp, DIF_OP_MUL, dnp->dn_right->dn_reg); 589178479Sjb 590178479Sjb instr = DIF_INSTR_FMT(op, dnp->dn_left->dn_reg, 591178479Sjb dnp->dn_right->dn_reg, dnp->dn_left->dn_reg); 592178479Sjb 593178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 594178479Sjb dt_regset_free(drp, dnp->dn_right->dn_reg); 595178479Sjb dnp->dn_reg = dnp->dn_left->dn_reg; 596178479Sjb 597178479Sjb if (lp_is_ptr && rp_is_ptr) 598178479Sjb dt_cg_ptrsize(dnp->dn_right, 599178479Sjb dlp, drp, DIF_OP_UDIV, dnp->dn_reg); 600178479Sjb} 601178479Sjb 602178479Sjbstatic uint_t 603178479Sjbdt_cg_stvar(const dt_ident_t *idp) 604178479Sjb{ 605178479Sjb static const uint_t aops[] = { DIF_OP_STGAA, DIF_OP_STTAA, DIF_OP_NOP }; 606178479Sjb static const uint_t sops[] = { DIF_OP_STGS, DIF_OP_STTS, DIF_OP_STLS }; 607178479Sjb 608178479Sjb uint_t i = (((idp->di_flags & DT_IDFLG_LOCAL) != 0) << 1) | 609178479Sjb ((idp->di_flags & DT_IDFLG_TLS) != 0); 610178479Sjb 611178479Sjb return (idp->di_kind == DT_IDENT_ARRAY ? aops[i] : sops[i]); 612178479Sjb} 613178479Sjb 614178479Sjbstatic void 615178479Sjbdt_cg_prearith_op(dt_node_t *dnp, dt_irlist_t *dlp, dt_regset_t *drp, uint_t op) 616178479Sjb{ 617178479Sjb ctf_file_t *ctfp = dnp->dn_ctfp; 618178479Sjb dif_instr_t instr; 619178479Sjb ctf_id_t type; 620178479Sjb ssize_t size = 1; 621178479Sjb int reg; 622178479Sjb 623178479Sjb if (dt_node_is_pointer(dnp)) { 624178479Sjb type = ctf_type_resolve(ctfp, dnp->dn_type); 625178479Sjb assert(ctf_type_kind(ctfp, type) == CTF_K_POINTER); 626178479Sjb size = ctf_type_size(ctfp, ctf_type_reference(ctfp, type)); 627178479Sjb } 628178479Sjb 629178479Sjb dt_cg_node(dnp->dn_child, dlp, drp); 630178479Sjb dnp->dn_reg = dnp->dn_child->dn_reg; 631178479Sjb 632178479Sjb if ((reg = dt_regset_alloc(drp)) == -1) 633178479Sjb longjmp(yypcb->pcb_jmpbuf, EDT_NOREG); 634178479Sjb 635178479Sjb dt_cg_setx(dlp, reg, size); 636178479Sjb 637178479Sjb instr = DIF_INSTR_FMT(op, dnp->dn_reg, reg, dnp->dn_reg); 638178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 639178479Sjb dt_regset_free(drp, reg); 640178479Sjb 641178479Sjb /* 642178479Sjb * If we are modifying a variable, generate an stv instruction from 643178479Sjb * the variable specified by the identifier. If we are storing to a 644178479Sjb * memory address, generate code again for the left-hand side using 645178479Sjb * DT_NF_REF to get the address, and then generate a store to it. 646178479Sjb * In both paths, we store the value in dnp->dn_reg (the new value). 647178479Sjb */ 648178479Sjb if (dnp->dn_child->dn_kind == DT_NODE_VAR) { 649178479Sjb dt_ident_t *idp = dt_ident_resolve(dnp->dn_child->dn_ident); 650178479Sjb 651178479Sjb idp->di_flags |= DT_IDFLG_DIFW; 652178479Sjb instr = DIF_INSTR_STV(dt_cg_stvar(idp), 653178479Sjb idp->di_id, dnp->dn_reg); 654178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 655178479Sjb } else { 656178479Sjb uint_t rbit = dnp->dn_child->dn_flags & DT_NF_REF; 657178479Sjb 658178479Sjb assert(dnp->dn_child->dn_flags & DT_NF_WRITABLE); 659178479Sjb assert(dnp->dn_child->dn_flags & DT_NF_LVALUE); 660178479Sjb 661178479Sjb dnp->dn_child->dn_flags |= DT_NF_REF; /* force pass-by-ref */ 662178479Sjb dt_cg_node(dnp->dn_child, dlp, drp); 663178479Sjb 664178479Sjb dt_cg_store(dnp, dlp, drp, dnp->dn_child); 665178479Sjb dt_regset_free(drp, dnp->dn_child->dn_reg); 666178479Sjb 667178479Sjb dnp->dn_left->dn_flags &= ~DT_NF_REF; 668178479Sjb dnp->dn_left->dn_flags |= rbit; 669178479Sjb } 670178479Sjb} 671178479Sjb 672178479Sjbstatic void 673178479Sjbdt_cg_postarith_op(dt_node_t *dnp, dt_irlist_t *dlp, 674178479Sjb dt_regset_t *drp, uint_t op) 675178479Sjb{ 676178479Sjb ctf_file_t *ctfp = dnp->dn_ctfp; 677178479Sjb dif_instr_t instr; 678178479Sjb ctf_id_t type; 679178479Sjb ssize_t size = 1; 680178479Sjb int nreg; 681178479Sjb 682178479Sjb if (dt_node_is_pointer(dnp)) { 683178479Sjb type = ctf_type_resolve(ctfp, dnp->dn_type); 684178479Sjb assert(ctf_type_kind(ctfp, type) == CTF_K_POINTER); 685178479Sjb size = ctf_type_size(ctfp, ctf_type_reference(ctfp, type)); 686178479Sjb } 687178479Sjb 688178479Sjb dt_cg_node(dnp->dn_child, dlp, drp); 689178479Sjb dnp->dn_reg = dnp->dn_child->dn_reg; 690178479Sjb 691178479Sjb if ((nreg = dt_regset_alloc(drp)) == -1) 692178479Sjb longjmp(yypcb->pcb_jmpbuf, EDT_NOREG); 693178479Sjb 694178479Sjb dt_cg_setx(dlp, nreg, size); 695178479Sjb instr = DIF_INSTR_FMT(op, dnp->dn_reg, nreg, nreg); 696178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 697178479Sjb 698178479Sjb /* 699178479Sjb * If we are modifying a variable, generate an stv instruction from 700178479Sjb * the variable specified by the identifier. If we are storing to a 701178479Sjb * memory address, generate code again for the left-hand side using 702178479Sjb * DT_NF_REF to get the address, and then generate a store to it. 703178479Sjb * In both paths, we store the value from 'nreg' (the new value). 704178479Sjb */ 705178479Sjb if (dnp->dn_child->dn_kind == DT_NODE_VAR) { 706178479Sjb dt_ident_t *idp = dt_ident_resolve(dnp->dn_child->dn_ident); 707178479Sjb 708178479Sjb idp->di_flags |= DT_IDFLG_DIFW; 709178479Sjb instr = DIF_INSTR_STV(dt_cg_stvar(idp), idp->di_id, nreg); 710178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 711178479Sjb } else { 712178479Sjb uint_t rbit = dnp->dn_child->dn_flags & DT_NF_REF; 713178479Sjb int oreg = dnp->dn_reg; 714178479Sjb 715178479Sjb assert(dnp->dn_child->dn_flags & DT_NF_WRITABLE); 716178479Sjb assert(dnp->dn_child->dn_flags & DT_NF_LVALUE); 717178479Sjb 718178479Sjb dnp->dn_child->dn_flags |= DT_NF_REF; /* force pass-by-ref */ 719178479Sjb dt_cg_node(dnp->dn_child, dlp, drp); 720178479Sjb 721178479Sjb dnp->dn_reg = nreg; 722178479Sjb dt_cg_store(dnp, dlp, drp, dnp->dn_child); 723178479Sjb dnp->dn_reg = oreg; 724178479Sjb 725178479Sjb dt_regset_free(drp, dnp->dn_child->dn_reg); 726178479Sjb dnp->dn_left->dn_flags &= ~DT_NF_REF; 727178479Sjb dnp->dn_left->dn_flags |= rbit; 728178479Sjb } 729178479Sjb 730178479Sjb dt_regset_free(drp, nreg); 731178479Sjb} 732178479Sjb 733178479Sjb/* 734178479Sjb * Determine if we should perform signed or unsigned comparison for an OP2. 735178479Sjb * If both operands are of arithmetic type, perform the usual arithmetic 736178479Sjb * conversions to determine the common real type for comparison [ISOC 6.5.8.3]. 737178479Sjb */ 738178479Sjbstatic int 739178479Sjbdt_cg_compare_signed(dt_node_t *dnp) 740178479Sjb{ 741178479Sjb dt_node_t dn; 742178479Sjb 743178479Sjb if (dt_node_is_string(dnp->dn_left) || 744178479Sjb dt_node_is_string(dnp->dn_right)) 745178479Sjb return (1); /* strings always compare signed */ 746178479Sjb else if (!dt_node_is_arith(dnp->dn_left) || 747178479Sjb !dt_node_is_arith(dnp->dn_right)) 748178479Sjb return (0); /* non-arithmetic types always compare unsigned */ 749178479Sjb 750178479Sjb bzero(&dn, sizeof (dn)); 751178479Sjb dt_node_promote(dnp->dn_left, dnp->dn_right, &dn); 752178479Sjb return (dn.dn_flags & DT_NF_SIGNED); 753178479Sjb} 754178479Sjb 755178479Sjbstatic void 756178479Sjbdt_cg_compare_op(dt_node_t *dnp, dt_irlist_t *dlp, dt_regset_t *drp, uint_t op) 757178479Sjb{ 758178479Sjb uint_t lbl_true = dt_irlist_label(dlp); 759178479Sjb uint_t lbl_post = dt_irlist_label(dlp); 760178479Sjb 761178479Sjb dif_instr_t instr; 762178479Sjb uint_t opc; 763178479Sjb 764178479Sjb dt_cg_node(dnp->dn_left, dlp, drp); 765178479Sjb dt_cg_node(dnp->dn_right, dlp, drp); 766178479Sjb 767178479Sjb if (dt_node_is_string(dnp->dn_left) || dt_node_is_string(dnp->dn_right)) 768178479Sjb opc = DIF_OP_SCMP; 769178479Sjb else 770178479Sjb opc = DIF_OP_CMP; 771178479Sjb 772178479Sjb instr = DIF_INSTR_CMP(opc, dnp->dn_left->dn_reg, dnp->dn_right->dn_reg); 773178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 774178479Sjb dt_regset_free(drp, dnp->dn_right->dn_reg); 775178479Sjb dnp->dn_reg = dnp->dn_left->dn_reg; 776178479Sjb 777178479Sjb instr = DIF_INSTR_BRANCH(op, lbl_true); 778178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 779178479Sjb 780178479Sjb instr = DIF_INSTR_MOV(DIF_REG_R0, dnp->dn_reg); 781178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 782178479Sjb 783178479Sjb instr = DIF_INSTR_BRANCH(DIF_OP_BA, lbl_post); 784178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 785178479Sjb 786178479Sjb dt_cg_xsetx(dlp, NULL, lbl_true, dnp->dn_reg, 1); 787178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(lbl_post, DIF_INSTR_NOP)); 788178479Sjb} 789178479Sjb 790178479Sjb/* 791178479Sjb * Code generation for the ternary op requires some trickery with the assembler 792178479Sjb * in order to conserve registers. We generate code for dn_expr and dn_left 793178479Sjb * and free their registers so they do not have be consumed across codegen for 794178479Sjb * dn_right. We insert a dummy MOV at the end of dn_left into the destination 795178479Sjb * register, which is not yet known because we haven't done dn_right yet, and 796178479Sjb * save the pointer to this instruction node. We then generate code for 797178479Sjb * dn_right and use its register as our output. Finally, we reach back and 798178479Sjb * patch the instruction for dn_left to move its output into this register. 799178479Sjb */ 800178479Sjbstatic void 801178479Sjbdt_cg_ternary_op(dt_node_t *dnp, dt_irlist_t *dlp, dt_regset_t *drp) 802178479Sjb{ 803178479Sjb uint_t lbl_false = dt_irlist_label(dlp); 804178479Sjb uint_t lbl_post = dt_irlist_label(dlp); 805178479Sjb 806178479Sjb dif_instr_t instr; 807178479Sjb dt_irnode_t *dip; 808178479Sjb 809178479Sjb dt_cg_node(dnp->dn_expr, dlp, drp); 810178479Sjb instr = DIF_INSTR_TST(dnp->dn_expr->dn_reg); 811178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 812178479Sjb dt_regset_free(drp, dnp->dn_expr->dn_reg); 813178479Sjb 814178479Sjb instr = DIF_INSTR_BRANCH(DIF_OP_BE, lbl_false); 815178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 816178479Sjb 817178479Sjb dt_cg_node(dnp->dn_left, dlp, drp); 818178479Sjb instr = DIF_INSTR_MOV(dnp->dn_left->dn_reg, DIF_REG_R0); 819178479Sjb dip = dt_cg_node_alloc(DT_LBL_NONE, instr); /* save dip for below */ 820178479Sjb dt_irlist_append(dlp, dip); 821178479Sjb dt_regset_free(drp, dnp->dn_left->dn_reg); 822178479Sjb 823178479Sjb instr = DIF_INSTR_BRANCH(DIF_OP_BA, lbl_post); 824178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 825178479Sjb 826178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(lbl_false, DIF_INSTR_NOP)); 827178479Sjb dt_cg_node(dnp->dn_right, dlp, drp); 828178479Sjb dnp->dn_reg = dnp->dn_right->dn_reg; 829178479Sjb 830178479Sjb /* 831178479Sjb * Now that dn_reg is assigned, reach back and patch the correct MOV 832178479Sjb * instruction into the tail of dn_left. We know dn_reg was unused 833178479Sjb * at that point because otherwise dn_right couldn't have allocated it. 834178479Sjb */ 835178479Sjb dip->di_instr = DIF_INSTR_MOV(dnp->dn_left->dn_reg, dnp->dn_reg); 836178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(lbl_post, DIF_INSTR_NOP)); 837178479Sjb} 838178479Sjb 839178479Sjbstatic void 840178479Sjbdt_cg_logical_and(dt_node_t *dnp, dt_irlist_t *dlp, dt_regset_t *drp) 841178479Sjb{ 842178479Sjb uint_t lbl_false = dt_irlist_label(dlp); 843178479Sjb uint_t lbl_post = dt_irlist_label(dlp); 844178479Sjb 845178479Sjb dif_instr_t instr; 846178479Sjb 847178479Sjb dt_cg_node(dnp->dn_left, dlp, drp); 848178479Sjb instr = DIF_INSTR_TST(dnp->dn_left->dn_reg); 849178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 850178479Sjb dt_regset_free(drp, dnp->dn_left->dn_reg); 851178479Sjb 852178479Sjb instr = DIF_INSTR_BRANCH(DIF_OP_BE, lbl_false); 853178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 854178479Sjb 855178479Sjb dt_cg_node(dnp->dn_right, dlp, drp); 856178479Sjb instr = DIF_INSTR_TST(dnp->dn_right->dn_reg); 857178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 858178479Sjb dnp->dn_reg = dnp->dn_right->dn_reg; 859178479Sjb 860178479Sjb instr = DIF_INSTR_BRANCH(DIF_OP_BE, lbl_false); 861178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 862178479Sjb 863178479Sjb dt_cg_setx(dlp, dnp->dn_reg, 1); 864178479Sjb 865178479Sjb instr = DIF_INSTR_BRANCH(DIF_OP_BA, lbl_post); 866178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 867178479Sjb 868178479Sjb instr = DIF_INSTR_MOV(DIF_REG_R0, dnp->dn_reg); 869178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(lbl_false, instr)); 870178479Sjb 871178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(lbl_post, DIF_INSTR_NOP)); 872178479Sjb} 873178479Sjb 874178479Sjbstatic void 875178479Sjbdt_cg_logical_xor(dt_node_t *dnp, dt_irlist_t *dlp, dt_regset_t *drp) 876178479Sjb{ 877178479Sjb uint_t lbl_next = dt_irlist_label(dlp); 878178479Sjb uint_t lbl_tail = dt_irlist_label(dlp); 879178479Sjb 880178479Sjb dif_instr_t instr; 881178479Sjb 882178479Sjb dt_cg_node(dnp->dn_left, dlp, drp); 883178479Sjb instr = DIF_INSTR_TST(dnp->dn_left->dn_reg); 884178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 885178479Sjb 886178479Sjb instr = DIF_INSTR_BRANCH(DIF_OP_BE, lbl_next); 887178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 888178479Sjb dt_cg_setx(dlp, dnp->dn_left->dn_reg, 1); 889178479Sjb 890178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(lbl_next, DIF_INSTR_NOP)); 891178479Sjb dt_cg_node(dnp->dn_right, dlp, drp); 892178479Sjb 893178479Sjb instr = DIF_INSTR_TST(dnp->dn_right->dn_reg); 894178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 895178479Sjb 896178479Sjb instr = DIF_INSTR_BRANCH(DIF_OP_BE, lbl_tail); 897178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 898178479Sjb dt_cg_setx(dlp, dnp->dn_right->dn_reg, 1); 899178479Sjb 900178479Sjb instr = DIF_INSTR_FMT(DIF_OP_XOR, dnp->dn_left->dn_reg, 901178479Sjb dnp->dn_right->dn_reg, dnp->dn_left->dn_reg); 902178479Sjb 903178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(lbl_tail, instr)); 904178479Sjb 905178479Sjb dt_regset_free(drp, dnp->dn_right->dn_reg); 906178479Sjb dnp->dn_reg = dnp->dn_left->dn_reg; 907178479Sjb} 908178479Sjb 909178479Sjbstatic void 910178479Sjbdt_cg_logical_or(dt_node_t *dnp, dt_irlist_t *dlp, dt_regset_t *drp) 911178479Sjb{ 912178479Sjb uint_t lbl_true = dt_irlist_label(dlp); 913178479Sjb uint_t lbl_false = dt_irlist_label(dlp); 914178479Sjb uint_t lbl_post = dt_irlist_label(dlp); 915178479Sjb 916178479Sjb dif_instr_t instr; 917178479Sjb 918178479Sjb dt_cg_node(dnp->dn_left, dlp, drp); 919178479Sjb instr = DIF_INSTR_TST(dnp->dn_left->dn_reg); 920178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 921178479Sjb dt_regset_free(drp, dnp->dn_left->dn_reg); 922178479Sjb 923178479Sjb instr = DIF_INSTR_BRANCH(DIF_OP_BNE, lbl_true); 924178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 925178479Sjb 926178479Sjb dt_cg_node(dnp->dn_right, dlp, drp); 927178479Sjb instr = DIF_INSTR_TST(dnp->dn_right->dn_reg); 928178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 929178479Sjb dnp->dn_reg = dnp->dn_right->dn_reg; 930178479Sjb 931178479Sjb instr = DIF_INSTR_BRANCH(DIF_OP_BE, lbl_false); 932178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 933178479Sjb 934178479Sjb dt_cg_xsetx(dlp, NULL, lbl_true, dnp->dn_reg, 1); 935178479Sjb 936178479Sjb instr = DIF_INSTR_BRANCH(DIF_OP_BA, lbl_post); 937178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 938178479Sjb 939178479Sjb instr = DIF_INSTR_MOV(DIF_REG_R0, dnp->dn_reg); 940178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(lbl_false, instr)); 941178479Sjb 942178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(lbl_post, DIF_INSTR_NOP)); 943178479Sjb} 944178479Sjb 945178479Sjbstatic void 946178479Sjbdt_cg_logical_neg(dt_node_t *dnp, dt_irlist_t *dlp, dt_regset_t *drp) 947178479Sjb{ 948178479Sjb uint_t lbl_zero = dt_irlist_label(dlp); 949178479Sjb uint_t lbl_post = dt_irlist_label(dlp); 950178479Sjb 951178479Sjb dif_instr_t instr; 952178479Sjb 953178479Sjb dt_cg_node(dnp->dn_child, dlp, drp); 954178479Sjb dnp->dn_reg = dnp->dn_child->dn_reg; 955178479Sjb 956178479Sjb instr = DIF_INSTR_TST(dnp->dn_reg); 957178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 958178479Sjb 959178479Sjb instr = DIF_INSTR_BRANCH(DIF_OP_BE, lbl_zero); 960178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 961178479Sjb 962178479Sjb instr = DIF_INSTR_MOV(DIF_REG_R0, dnp->dn_reg); 963178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 964178479Sjb 965178479Sjb instr = DIF_INSTR_BRANCH(DIF_OP_BA, lbl_post); 966178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 967178479Sjb 968178479Sjb dt_cg_xsetx(dlp, NULL, lbl_zero, dnp->dn_reg, 1); 969178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(lbl_post, DIF_INSTR_NOP)); 970178479Sjb} 971178479Sjb 972178479Sjbstatic void 973178479Sjbdt_cg_asgn_op(dt_node_t *dnp, dt_irlist_t *dlp, dt_regset_t *drp) 974178479Sjb{ 975178479Sjb dif_instr_t instr; 976178479Sjb dt_ident_t *idp; 977178479Sjb 978178479Sjb /* 979178479Sjb * If we are performing a structure assignment of a translated type, 980178479Sjb * we must instantiate all members and create a snapshot of the object 981178479Sjb * in scratch space. We allocs a chunk of memory, generate code for 982178479Sjb * each member, and then set dnp->dn_reg to the scratch object address. 983178479Sjb */ 984178479Sjb if ((idp = dt_node_resolve(dnp->dn_right, DT_IDENT_XLSOU)) != NULL) { 985178479Sjb ctf_membinfo_t ctm; 986178479Sjb dt_xlator_t *dxp = idp->di_data; 987178479Sjb dt_node_t *mnp, dn, mn; 988178479Sjb int r1, r2; 989178479Sjb 990178479Sjb /* 991178479Sjb * Create two fake dt_node_t's representing operator "." and a 992178479Sjb * right-hand identifier child node. These will be repeatedly 993178479Sjb * modified according to each instantiated member so that we 994178479Sjb * can pass them to dt_cg_store() and effect a member store. 995178479Sjb */ 996178479Sjb bzero(&dn, sizeof (dt_node_t)); 997178479Sjb dn.dn_kind = DT_NODE_OP2; 998178479Sjb dn.dn_op = DT_TOK_DOT; 999178479Sjb dn.dn_left = dnp; 1000178479Sjb dn.dn_right = &mn; 1001178479Sjb 1002178479Sjb bzero(&mn, sizeof (dt_node_t)); 1003178479Sjb mn.dn_kind = DT_NODE_IDENT; 1004178479Sjb mn.dn_op = DT_TOK_IDENT; 1005178479Sjb 1006178479Sjb /* 1007178479Sjb * Allocate a register for our scratch data pointer. First we 1008178479Sjb * set it to the size of our data structure, and then replace 1009178479Sjb * it with the result of an allocs of the specified size. 1010178479Sjb */ 1011178479Sjb if ((r1 = dt_regset_alloc(drp)) == -1) 1012178479Sjb longjmp(yypcb->pcb_jmpbuf, EDT_NOREG); 1013178479Sjb 1014178479Sjb dt_cg_setx(dlp, r1, 1015178479Sjb ctf_type_size(dxp->dx_dst_ctfp, dxp->dx_dst_base)); 1016178479Sjb 1017178479Sjb instr = DIF_INSTR_ALLOCS(r1, r1); 1018178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 1019178479Sjb 1020178479Sjb /* 1021178479Sjb * When dt_cg_asgn_op() is called, we have already generated 1022178479Sjb * code for dnp->dn_right, which is the translator input. We 1023178479Sjb * now associate this register with the translator's input 1024178479Sjb * identifier so it can be referenced during our member loop. 1025178479Sjb */ 1026178479Sjb dxp->dx_ident->di_flags |= DT_IDFLG_CGREG; 1027178479Sjb dxp->dx_ident->di_id = dnp->dn_right->dn_reg; 1028178479Sjb 1029178479Sjb for (mnp = dxp->dx_members; mnp != NULL; mnp = mnp->dn_list) { 1030178479Sjb /* 1031178479Sjb * Generate code for the translator member expression, 1032178479Sjb * and then cast the result to the member type. 1033178479Sjb */ 1034178479Sjb dt_cg_node(mnp->dn_membexpr, dlp, drp); 1035178479Sjb mnp->dn_reg = mnp->dn_membexpr->dn_reg; 1036178479Sjb dt_cg_typecast(mnp->dn_membexpr, mnp, dlp, drp); 1037178479Sjb 1038178479Sjb /* 1039178479Sjb * Ask CTF for the offset of the member so we can store 1040178479Sjb * to the appropriate offset. This call has already 1041178479Sjb * been done once by the parser, so it should succeed. 1042178479Sjb */ 1043178479Sjb if (ctf_member_info(dxp->dx_dst_ctfp, dxp->dx_dst_base, 1044178479Sjb mnp->dn_membname, &ctm) == CTF_ERR) { 1045178479Sjb yypcb->pcb_hdl->dt_ctferr = 1046178479Sjb ctf_errno(dxp->dx_dst_ctfp); 1047178479Sjb longjmp(yypcb->pcb_jmpbuf, EDT_CTF); 1048178479Sjb } 1049178479Sjb 1050178479Sjb /* 1051178479Sjb * If the destination member is at offset 0, store the 1052178479Sjb * result directly to r1 (the scratch buffer address). 1053178479Sjb * Otherwise allocate another temporary for the offset 1054178479Sjb * and add r1 to it before storing the result. 1055178479Sjb */ 1056178479Sjb if (ctm.ctm_offset != 0) { 1057178479Sjb if ((r2 = dt_regset_alloc(drp)) == -1) 1058178479Sjb longjmp(yypcb->pcb_jmpbuf, EDT_NOREG); 1059178479Sjb 1060178479Sjb /* 1061178479Sjb * Add the member offset rounded down to the 1062178479Sjb * nearest byte. If the offset was not aligned 1063178479Sjb * on a byte boundary, this member is a bit- 1064178479Sjb * field and dt_cg_store() will handle masking. 1065178479Sjb */ 1066178479Sjb dt_cg_setx(dlp, r2, ctm.ctm_offset / NBBY); 1067178479Sjb instr = DIF_INSTR_FMT(DIF_OP_ADD, r1, r2, r2); 1068178479Sjb dt_irlist_append(dlp, 1069178479Sjb dt_cg_node_alloc(DT_LBL_NONE, instr)); 1070178479Sjb 1071178479Sjb dt_node_type_propagate(mnp, &dn); 1072178479Sjb dn.dn_right->dn_string = mnp->dn_membname; 1073178479Sjb dn.dn_reg = r2; 1074178479Sjb 1075178479Sjb dt_cg_store(mnp, dlp, drp, &dn); 1076178479Sjb dt_regset_free(drp, r2); 1077178479Sjb 1078178479Sjb } else { 1079178479Sjb dt_node_type_propagate(mnp, &dn); 1080178479Sjb dn.dn_right->dn_string = mnp->dn_membname; 1081178479Sjb dn.dn_reg = r1; 1082178479Sjb 1083178479Sjb dt_cg_store(mnp, dlp, drp, &dn); 1084178479Sjb } 1085178479Sjb 1086178479Sjb dt_regset_free(drp, mnp->dn_reg); 1087178479Sjb } 1088178479Sjb 1089178479Sjb dxp->dx_ident->di_flags &= ~DT_IDFLG_CGREG; 1090178479Sjb dxp->dx_ident->di_id = 0; 1091178479Sjb 1092178479Sjb if (dnp->dn_right->dn_reg != -1) 1093178479Sjb dt_regset_free(drp, dnp->dn_right->dn_reg); 1094178479Sjb 1095178479Sjb assert(dnp->dn_reg == dnp->dn_right->dn_reg); 1096178479Sjb dnp->dn_reg = r1; 1097178479Sjb } 1098178479Sjb 1099178479Sjb /* 1100178479Sjb * If we are storing to a variable, generate an stv instruction from 1101178479Sjb * the variable specified by the identifier. If we are storing to a 1102178479Sjb * memory address, generate code again for the left-hand side using 1103178479Sjb * DT_NF_REF to get the address, and then generate a store to it. 1104178479Sjb * In both paths, we assume dnp->dn_reg already has the new value. 1105178479Sjb */ 1106178479Sjb if (dnp->dn_left->dn_kind == DT_NODE_VAR) { 1107178479Sjb idp = dt_ident_resolve(dnp->dn_left->dn_ident); 1108178479Sjb 1109178479Sjb if (idp->di_kind == DT_IDENT_ARRAY) 1110178479Sjb dt_cg_arglist(idp, dnp->dn_left->dn_args, dlp, drp); 1111178479Sjb 1112178479Sjb idp->di_flags |= DT_IDFLG_DIFW; 1113178479Sjb instr = DIF_INSTR_STV(dt_cg_stvar(idp), 1114178479Sjb idp->di_id, dnp->dn_reg); 1115178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 1116178479Sjb } else { 1117178479Sjb uint_t rbit = dnp->dn_left->dn_flags & DT_NF_REF; 1118178479Sjb 1119178479Sjb assert(dnp->dn_left->dn_flags & DT_NF_WRITABLE); 1120178479Sjb assert(dnp->dn_left->dn_flags & DT_NF_LVALUE); 1121178479Sjb 1122178479Sjb dnp->dn_left->dn_flags |= DT_NF_REF; /* force pass-by-ref */ 1123178479Sjb 1124178479Sjb dt_cg_node(dnp->dn_left, dlp, drp); 1125178479Sjb dt_cg_store(dnp, dlp, drp, dnp->dn_left); 1126178479Sjb dt_regset_free(drp, dnp->dn_left->dn_reg); 1127178479Sjb 1128178479Sjb dnp->dn_left->dn_flags &= ~DT_NF_REF; 1129178479Sjb dnp->dn_left->dn_flags |= rbit; 1130178479Sjb } 1131178479Sjb} 1132178479Sjb 1133178479Sjbstatic void 1134178479Sjbdt_cg_assoc_op(dt_node_t *dnp, dt_irlist_t *dlp, dt_regset_t *drp) 1135178479Sjb{ 1136178479Sjb dif_instr_t instr; 1137178479Sjb uint_t op; 1138178479Sjb 1139178479Sjb assert(dnp->dn_kind == DT_NODE_VAR); 1140178479Sjb assert(!(dnp->dn_ident->di_flags & DT_IDFLG_LOCAL)); 1141178479Sjb assert(dnp->dn_args != NULL); 1142178479Sjb 1143178479Sjb dt_cg_arglist(dnp->dn_ident, dnp->dn_args, dlp, drp); 1144178479Sjb 1145178479Sjb if ((dnp->dn_reg = dt_regset_alloc(drp)) == -1) 1146178479Sjb longjmp(yypcb->pcb_jmpbuf, EDT_NOREG); 1147178479Sjb 1148178479Sjb if (dnp->dn_ident->di_flags & DT_IDFLG_TLS) 1149178479Sjb op = DIF_OP_LDTAA; 1150178479Sjb else 1151178479Sjb op = DIF_OP_LDGAA; 1152178479Sjb 1153178479Sjb dnp->dn_ident->di_flags |= DT_IDFLG_DIFR; 1154178479Sjb instr = DIF_INSTR_LDV(op, dnp->dn_ident->di_id, dnp->dn_reg); 1155178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 1156178479Sjb 1157178479Sjb /* 1158178479Sjb * If the associative array is a pass-by-reference type, then we are 1159178479Sjb * loading its value as a pointer to either load or store through it. 1160178479Sjb * The array element in question may not have been faulted in yet, in 1161178479Sjb * which case DIF_OP_LD*AA will return zero. We append an epilogue 1162178479Sjb * of instructions similar to the following: 1163178479Sjb * 1164178479Sjb * ld?aa id, %r1 ! base ld?aa instruction above 1165178479Sjb * tst %r1 ! start of epilogue 1166178479Sjb * +--- bne label 1167178479Sjb * | setx size, %r1 1168178479Sjb * | allocs %r1, %r1 1169178479Sjb * | st?aa id, %r1 1170178479Sjb * | ld?aa id, %r1 1171178479Sjb * v 1172178479Sjb * label: < rest of code > 1173178479Sjb * 1174178479Sjb * The idea is that we allocs a zero-filled chunk of scratch space and 1175178479Sjb * do a DIF_OP_ST*AA to fault in and initialize the array element, and 1176178479Sjb * then reload it to get the faulted-in address of the new variable 1177178479Sjb * storage. This isn't cheap, but pass-by-ref associative array values 1178178479Sjb * are (thus far) uncommon and the allocs cost only occurs once. If 1179178479Sjb * this path becomes important to DTrace users, we can improve things 1180178479Sjb * by adding a new DIF opcode to fault in associative array elements. 1181178479Sjb */ 1182178479Sjb if (dnp->dn_flags & DT_NF_REF) { 1183178479Sjb uint_t stvop = op == DIF_OP_LDTAA ? DIF_OP_STTAA : DIF_OP_STGAA; 1184178479Sjb uint_t label = dt_irlist_label(dlp); 1185178479Sjb 1186178479Sjb instr = DIF_INSTR_TST(dnp->dn_reg); 1187178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 1188178479Sjb 1189178479Sjb instr = DIF_INSTR_BRANCH(DIF_OP_BNE, label); 1190178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 1191178479Sjb 1192178479Sjb dt_cg_setx(dlp, dnp->dn_reg, dt_node_type_size(dnp)); 1193178479Sjb instr = DIF_INSTR_ALLOCS(dnp->dn_reg, dnp->dn_reg); 1194178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 1195178479Sjb 1196178479Sjb dnp->dn_ident->di_flags |= DT_IDFLG_DIFW; 1197178479Sjb instr = DIF_INSTR_STV(stvop, dnp->dn_ident->di_id, dnp->dn_reg); 1198178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 1199178479Sjb 1200178479Sjb instr = DIF_INSTR_LDV(op, dnp->dn_ident->di_id, dnp->dn_reg); 1201178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 1202178479Sjb 1203178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(label, DIF_INSTR_NOP)); 1204178479Sjb } 1205178479Sjb} 1206178479Sjb 1207178479Sjbstatic void 1208178479Sjbdt_cg_array_op(dt_node_t *dnp, dt_irlist_t *dlp, dt_regset_t *drp) 1209178479Sjb{ 1210178479Sjb dt_probe_t *prp = yypcb->pcb_probe; 1211178479Sjb uintmax_t saved = dnp->dn_args->dn_value; 1212178479Sjb dt_ident_t *idp = dnp->dn_ident; 1213178479Sjb 1214178479Sjb dif_instr_t instr; 1215178479Sjb uint_t op; 1216178479Sjb size_t size; 1217178479Sjb int reg, n; 1218178479Sjb 1219178479Sjb assert(dnp->dn_kind == DT_NODE_VAR); 1220178479Sjb assert(!(idp->di_flags & DT_IDFLG_LOCAL)); 1221178479Sjb 1222178479Sjb assert(dnp->dn_args->dn_kind == DT_NODE_INT); 1223178479Sjb assert(dnp->dn_args->dn_list == NULL); 1224178479Sjb 1225178479Sjb /* 1226178479Sjb * If this is a reference in the args[] array, temporarily modify the 1227178479Sjb * array index according to the static argument mapping (if any), 1228178479Sjb * unless the argument reference is provided by a dynamic translator. 1229178479Sjb * If we're using a dynamic translator for args[], then just set dn_reg 1230178479Sjb * to an invalid reg and return: DIF_OP_XLARG will fetch the arg later. 1231178479Sjb */ 1232178479Sjb if (idp->di_id == DIF_VAR_ARGS) { 1233178479Sjb if ((idp->di_kind == DT_IDENT_XLPTR || 1234178479Sjb idp->di_kind == DT_IDENT_XLSOU) && 1235178479Sjb dt_xlator_dynamic(idp->di_data)) { 1236178479Sjb dnp->dn_reg = -1; 1237178479Sjb return; 1238178479Sjb } 1239178479Sjb dnp->dn_args->dn_value = prp->pr_mapping[saved]; 1240178479Sjb } 1241178479Sjb 1242178479Sjb dt_cg_node(dnp->dn_args, dlp, drp); 1243178479Sjb dnp->dn_args->dn_value = saved; 1244178479Sjb 1245178479Sjb dnp->dn_reg = dnp->dn_args->dn_reg; 1246178479Sjb 1247178479Sjb if (idp->di_flags & DT_IDFLG_TLS) 1248178479Sjb op = DIF_OP_LDTA; 1249178479Sjb else 1250178479Sjb op = DIF_OP_LDGA; 1251178479Sjb 1252178479Sjb idp->di_flags |= DT_IDFLG_DIFR; 1253178479Sjb 1254178479Sjb instr = DIF_INSTR_LDA(op, idp->di_id, 1255178479Sjb dnp->dn_args->dn_reg, dnp->dn_reg); 1256178479Sjb 1257178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 1258178479Sjb 1259178479Sjb /* 1260178479Sjb * If this is a reference to the args[] array, we need to take the 1261178479Sjb * additional step of explicitly eliminating any bits larger than the 1262178479Sjb * type size: the DIF interpreter in the kernel will always give us 1263178479Sjb * the raw (64-bit) argument value, and any bits larger than the type 1264178479Sjb * size may be junk. As a practical matter, this arises only on 64-bit 1265178479Sjb * architectures and only when the argument index is larger than the 1266178479Sjb * number of arguments passed directly to DTrace: if a 8-, 16- or 1267178479Sjb * 32-bit argument must be retrieved from the stack, it is possible 1268178479Sjb * (and it some cases, likely) that the upper bits will be garbage. 1269178479Sjb */ 1270178479Sjb if (idp->di_id != DIF_VAR_ARGS || !dt_node_is_scalar(dnp)) 1271178479Sjb return; 1272178479Sjb 1273178479Sjb if ((size = dt_node_type_size(dnp)) == sizeof (uint64_t)) 1274178479Sjb return; 1275178479Sjb 1276178479Sjb if ((reg = dt_regset_alloc(drp)) == -1) 1277178479Sjb longjmp(yypcb->pcb_jmpbuf, EDT_NOREG); 1278178479Sjb 1279178479Sjb assert(size < sizeof (uint64_t)); 1280178479Sjb n = sizeof (uint64_t) * NBBY - size * NBBY; 1281178479Sjb 1282178479Sjb dt_cg_setx(dlp, reg, n); 1283178479Sjb 1284178479Sjb instr = DIF_INSTR_FMT(DIF_OP_SLL, dnp->dn_reg, reg, dnp->dn_reg); 1285178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 1286178479Sjb 1287178479Sjb instr = DIF_INSTR_FMT((dnp->dn_flags & DT_NF_SIGNED) ? 1288178479Sjb DIF_OP_SRA : DIF_OP_SRL, dnp->dn_reg, reg, dnp->dn_reg); 1289178479Sjb 1290178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 1291178479Sjb dt_regset_free(drp, reg); 1292178479Sjb} 1293178479Sjb 1294178479Sjb/* 1295178479Sjb * Generate code for an inlined variable reference. Inlines can be used to 1296178479Sjb * define either scalar or associative array substitutions. For scalars, we 1297178479Sjb * simply generate code for the parse tree saved in the identifier's din_root, 1298178479Sjb * and then cast the resulting expression to the inline's declaration type. 1299178479Sjb * For arrays, we take the input parameter subtrees from dnp->dn_args and 1300178479Sjb * temporarily store them in the din_root of each din_argv[i] identifier, 1301178479Sjb * which are themselves inlines and were set up for us by the parser. The 1302178479Sjb * result is that any reference to the inlined parameter inside the top-level 1303178479Sjb * din_root will turn into a recursive call to dt_cg_inline() for a scalar 1304178479Sjb * inline whose din_root will refer to the subtree pointed to by the argument. 1305178479Sjb */ 1306178479Sjbstatic void 1307178479Sjbdt_cg_inline(dt_node_t *dnp, dt_irlist_t *dlp, dt_regset_t *drp) 1308178479Sjb{ 1309178479Sjb dt_ident_t *idp = dnp->dn_ident; 1310178479Sjb dt_idnode_t *inp = idp->di_iarg; 1311178479Sjb 1312178479Sjb dt_idnode_t *pinp; 1313178479Sjb dt_node_t *pnp; 1314178479Sjb int i; 1315178479Sjb 1316178479Sjb assert(idp->di_flags & DT_IDFLG_INLINE); 1317178479Sjb assert(idp->di_ops == &dt_idops_inline); 1318178479Sjb 1319178479Sjb if (idp->di_kind == DT_IDENT_ARRAY) { 1320178479Sjb for (i = 0, pnp = dnp->dn_args; 1321178479Sjb pnp != NULL; pnp = pnp->dn_list, i++) { 1322178479Sjb if (inp->din_argv[i] != NULL) { 1323178479Sjb pinp = inp->din_argv[i]->di_iarg; 1324178479Sjb pinp->din_root = pnp; 1325178479Sjb } 1326178479Sjb } 1327178479Sjb } 1328178479Sjb 1329178479Sjb dt_cg_node(inp->din_root, dlp, drp); 1330178479Sjb dnp->dn_reg = inp->din_root->dn_reg; 1331178479Sjb dt_cg_typecast(inp->din_root, dnp, dlp, drp); 1332178479Sjb 1333178479Sjb if (idp->di_kind == DT_IDENT_ARRAY) { 1334178479Sjb for (i = 0; i < inp->din_argc; i++) { 1335178479Sjb pinp = inp->din_argv[i]->di_iarg; 1336178479Sjb pinp->din_root = NULL; 1337178479Sjb } 1338178479Sjb } 1339178479Sjb} 1340178479Sjb 1341178479Sjbstatic void 1342178479Sjbdt_cg_func_typeref(dtrace_hdl_t *dtp, dt_node_t *dnp) 1343178479Sjb{ 1344178479Sjb dtrace_typeinfo_t dtt; 1345178479Sjb dt_node_t *addr = dnp->dn_args; 1346178479Sjb dt_node_t *nelm = addr->dn_list; 1347178479Sjb dt_node_t *strp = nelm->dn_list; 1348178479Sjb dt_node_t *typs = strp->dn_list; 1349178479Sjb char buf[DT_TYPE_NAMELEN]; 1350178479Sjb char *p; 1351178479Sjb 1352178479Sjb ctf_type_name(addr->dn_ctfp, addr->dn_type, buf, sizeof (buf)); 1353178479Sjb 1354178479Sjb /* 1355178479Sjb * XXX Hack alert! XXX 1356178479Sjb * The prototype has two dummy args that we munge to represent 1357178479Sjb * the type string and the type size. 1358178479Sjb * 1359178479Sjb * Yes, I hear your grumble, but it works for now. We'll come 1360178479Sjb * up with a more elegant implementation later. :-) 1361178479Sjb */ 1362178479Sjb free(strp->dn_string); 1363178479Sjb 1364178479Sjb if ((p = strchr(buf, '*')) != NULL) 1365178479Sjb *p = '\0'; 1366178479Sjb 1367178479Sjb strp->dn_string = strdup(buf); 1368178479Sjb 1369178479Sjb if (dtrace_lookup_by_type(dtp, DTRACE_OBJ_EVERY, buf, &dtt) < 0) 1370178479Sjb return; 1371178479Sjb 1372178479Sjb typs->dn_value = ctf_type_size(dtt.dtt_ctfp, dtt.dtt_type); 1373178479Sjb} 1374178479Sjb 1375178479Sjbstatic void 1376178479Sjbdt_cg_node(dt_node_t *dnp, dt_irlist_t *dlp, dt_regset_t *drp) 1377178479Sjb{ 1378178479Sjb ctf_file_t *ctfp = dnp->dn_ctfp; 1379178479Sjb ctf_file_t *octfp; 1380178479Sjb ctf_membinfo_t m; 1381178479Sjb ctf_id_t type; 1382178479Sjb 1383178479Sjb dif_instr_t instr; 1384178479Sjb dt_ident_t *idp; 1385178479Sjb ssize_t stroff; 1386178479Sjb uint_t op; 1387178479Sjb int reg; 1388178479Sjb 1389178479Sjb switch (dnp->dn_op) { 1390178479Sjb case DT_TOK_COMMA: 1391178479Sjb dt_cg_node(dnp->dn_left, dlp, drp); 1392178479Sjb dt_regset_free(drp, dnp->dn_left->dn_reg); 1393178479Sjb dt_cg_node(dnp->dn_right, dlp, drp); 1394178479Sjb dnp->dn_reg = dnp->dn_right->dn_reg; 1395178479Sjb break; 1396178479Sjb 1397178479Sjb case DT_TOK_ASGN: 1398178479Sjb dt_cg_node(dnp->dn_right, dlp, drp); 1399178479Sjb dnp->dn_reg = dnp->dn_right->dn_reg; 1400178479Sjb dt_cg_asgn_op(dnp, dlp, drp); 1401178479Sjb break; 1402178479Sjb 1403178479Sjb case DT_TOK_ADD_EQ: 1404178479Sjb dt_cg_arithmetic_op(dnp, dlp, drp, DIF_OP_ADD); 1405178479Sjb dt_cg_asgn_op(dnp, dlp, drp); 1406178479Sjb break; 1407178479Sjb 1408178479Sjb case DT_TOK_SUB_EQ: 1409178479Sjb dt_cg_arithmetic_op(dnp, dlp, drp, DIF_OP_SUB); 1410178479Sjb dt_cg_asgn_op(dnp, dlp, drp); 1411178479Sjb break; 1412178479Sjb 1413178479Sjb case DT_TOK_MUL_EQ: 1414178479Sjb dt_cg_arithmetic_op(dnp, dlp, drp, DIF_OP_MUL); 1415178479Sjb dt_cg_asgn_op(dnp, dlp, drp); 1416178479Sjb break; 1417178479Sjb 1418178479Sjb case DT_TOK_DIV_EQ: 1419178479Sjb dt_cg_arithmetic_op(dnp, dlp, drp, 1420178479Sjb (dnp->dn_flags & DT_NF_SIGNED) ? DIF_OP_SDIV : DIF_OP_UDIV); 1421178479Sjb dt_cg_asgn_op(dnp, dlp, drp); 1422178479Sjb break; 1423178479Sjb 1424178479Sjb case DT_TOK_MOD_EQ: 1425178479Sjb dt_cg_arithmetic_op(dnp, dlp, drp, 1426178479Sjb (dnp->dn_flags & DT_NF_SIGNED) ? DIF_OP_SREM : DIF_OP_UREM); 1427178479Sjb dt_cg_asgn_op(dnp, dlp, drp); 1428178479Sjb break; 1429178479Sjb 1430178479Sjb case DT_TOK_AND_EQ: 1431178479Sjb dt_cg_arithmetic_op(dnp, dlp, drp, DIF_OP_AND); 1432178479Sjb dt_cg_asgn_op(dnp, dlp, drp); 1433178479Sjb break; 1434178479Sjb 1435178479Sjb case DT_TOK_XOR_EQ: 1436178479Sjb dt_cg_arithmetic_op(dnp, dlp, drp, DIF_OP_XOR); 1437178479Sjb dt_cg_asgn_op(dnp, dlp, drp); 1438178479Sjb break; 1439178479Sjb 1440178479Sjb case DT_TOK_OR_EQ: 1441178479Sjb dt_cg_arithmetic_op(dnp, dlp, drp, DIF_OP_OR); 1442178479Sjb dt_cg_asgn_op(dnp, dlp, drp); 1443178479Sjb break; 1444178479Sjb 1445178479Sjb case DT_TOK_LSH_EQ: 1446178479Sjb dt_cg_arithmetic_op(dnp, dlp, drp, DIF_OP_SLL); 1447178479Sjb dt_cg_asgn_op(dnp, dlp, drp); 1448178479Sjb break; 1449178479Sjb 1450178479Sjb case DT_TOK_RSH_EQ: 1451178479Sjb dt_cg_arithmetic_op(dnp, dlp, drp, 1452178479Sjb (dnp->dn_flags & DT_NF_SIGNED) ? DIF_OP_SRA : DIF_OP_SRL); 1453178479Sjb dt_cg_asgn_op(dnp, dlp, drp); 1454178479Sjb break; 1455178479Sjb 1456178479Sjb case DT_TOK_QUESTION: 1457178479Sjb dt_cg_ternary_op(dnp, dlp, drp); 1458178479Sjb break; 1459178479Sjb 1460178479Sjb case DT_TOK_LOR: 1461178479Sjb dt_cg_logical_or(dnp, dlp, drp); 1462178479Sjb break; 1463178479Sjb 1464178479Sjb case DT_TOK_LXOR: 1465178479Sjb dt_cg_logical_xor(dnp, dlp, drp); 1466178479Sjb break; 1467178479Sjb 1468178479Sjb case DT_TOK_LAND: 1469178479Sjb dt_cg_logical_and(dnp, dlp, drp); 1470178479Sjb break; 1471178479Sjb 1472178479Sjb case DT_TOK_BOR: 1473178479Sjb dt_cg_arithmetic_op(dnp, dlp, drp, DIF_OP_OR); 1474178479Sjb break; 1475178479Sjb 1476178479Sjb case DT_TOK_XOR: 1477178479Sjb dt_cg_arithmetic_op(dnp, dlp, drp, DIF_OP_XOR); 1478178479Sjb break; 1479178479Sjb 1480178479Sjb case DT_TOK_BAND: 1481178479Sjb dt_cg_arithmetic_op(dnp, dlp, drp, DIF_OP_AND); 1482178479Sjb break; 1483178479Sjb 1484178479Sjb case DT_TOK_EQU: 1485178479Sjb dt_cg_compare_op(dnp, dlp, drp, DIF_OP_BE); 1486178479Sjb break; 1487178479Sjb 1488178479Sjb case DT_TOK_NEQ: 1489178479Sjb dt_cg_compare_op(dnp, dlp, drp, DIF_OP_BNE); 1490178479Sjb break; 1491178479Sjb 1492178479Sjb case DT_TOK_LT: 1493178479Sjb dt_cg_compare_op(dnp, dlp, drp, 1494178479Sjb dt_cg_compare_signed(dnp) ? DIF_OP_BL : DIF_OP_BLU); 1495178479Sjb break; 1496178479Sjb 1497178479Sjb case DT_TOK_LE: 1498178479Sjb dt_cg_compare_op(dnp, dlp, drp, 1499178479Sjb dt_cg_compare_signed(dnp) ? DIF_OP_BLE : DIF_OP_BLEU); 1500178479Sjb break; 1501178479Sjb 1502178479Sjb case DT_TOK_GT: 1503178479Sjb dt_cg_compare_op(dnp, dlp, drp, 1504178479Sjb dt_cg_compare_signed(dnp) ? DIF_OP_BG : DIF_OP_BGU); 1505178479Sjb break; 1506178479Sjb 1507178479Sjb case DT_TOK_GE: 1508178479Sjb dt_cg_compare_op(dnp, dlp, drp, 1509178479Sjb dt_cg_compare_signed(dnp) ? DIF_OP_BGE : DIF_OP_BGEU); 1510178479Sjb break; 1511178479Sjb 1512178479Sjb case DT_TOK_LSH: 1513178479Sjb dt_cg_arithmetic_op(dnp, dlp, drp, DIF_OP_SLL); 1514178479Sjb break; 1515178479Sjb 1516178479Sjb case DT_TOK_RSH: 1517178479Sjb dt_cg_arithmetic_op(dnp, dlp, drp, 1518178479Sjb (dnp->dn_flags & DT_NF_SIGNED) ? DIF_OP_SRA : DIF_OP_SRL); 1519178479Sjb break; 1520178479Sjb 1521178479Sjb case DT_TOK_ADD: 1522178479Sjb dt_cg_arithmetic_op(dnp, dlp, drp, DIF_OP_ADD); 1523178479Sjb break; 1524178479Sjb 1525178479Sjb case DT_TOK_SUB: 1526178479Sjb dt_cg_arithmetic_op(dnp, dlp, drp, DIF_OP_SUB); 1527178479Sjb break; 1528178479Sjb 1529178479Sjb case DT_TOK_MUL: 1530178479Sjb dt_cg_arithmetic_op(dnp, dlp, drp, DIF_OP_MUL); 1531178479Sjb break; 1532178479Sjb 1533178479Sjb case DT_TOK_DIV: 1534178479Sjb dt_cg_arithmetic_op(dnp, dlp, drp, 1535178479Sjb (dnp->dn_flags & DT_NF_SIGNED) ? DIF_OP_SDIV : DIF_OP_UDIV); 1536178479Sjb break; 1537178479Sjb 1538178479Sjb case DT_TOK_MOD: 1539178479Sjb dt_cg_arithmetic_op(dnp, dlp, drp, 1540178479Sjb (dnp->dn_flags & DT_NF_SIGNED) ? DIF_OP_SREM : DIF_OP_UREM); 1541178479Sjb break; 1542178479Sjb 1543178479Sjb case DT_TOK_LNEG: 1544178479Sjb dt_cg_logical_neg(dnp, dlp, drp); 1545178479Sjb break; 1546178479Sjb 1547178479Sjb case DT_TOK_BNEG: 1548178479Sjb dt_cg_node(dnp->dn_child, dlp, drp); 1549178479Sjb dnp->dn_reg = dnp->dn_child->dn_reg; 1550178479Sjb instr = DIF_INSTR_NOT(dnp->dn_reg, dnp->dn_reg); 1551178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 1552178479Sjb break; 1553178479Sjb 1554178479Sjb case DT_TOK_PREINC: 1555178479Sjb dt_cg_prearith_op(dnp, dlp, drp, DIF_OP_ADD); 1556178479Sjb break; 1557178479Sjb 1558178479Sjb case DT_TOK_POSTINC: 1559178479Sjb dt_cg_postarith_op(dnp, dlp, drp, DIF_OP_ADD); 1560178479Sjb break; 1561178479Sjb 1562178479Sjb case DT_TOK_PREDEC: 1563178479Sjb dt_cg_prearith_op(dnp, dlp, drp, DIF_OP_SUB); 1564178479Sjb break; 1565178479Sjb 1566178479Sjb case DT_TOK_POSTDEC: 1567178479Sjb dt_cg_postarith_op(dnp, dlp, drp, DIF_OP_SUB); 1568178479Sjb break; 1569178479Sjb 1570178479Sjb case DT_TOK_IPOS: 1571178479Sjb dt_cg_node(dnp->dn_child, dlp, drp); 1572178479Sjb dnp->dn_reg = dnp->dn_child->dn_reg; 1573178479Sjb break; 1574178479Sjb 1575178479Sjb case DT_TOK_INEG: 1576178479Sjb dt_cg_node(dnp->dn_child, dlp, drp); 1577178479Sjb dnp->dn_reg = dnp->dn_child->dn_reg; 1578178479Sjb 1579178479Sjb instr = DIF_INSTR_FMT(DIF_OP_SUB, DIF_REG_R0, 1580178479Sjb dnp->dn_reg, dnp->dn_reg); 1581178479Sjb 1582178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 1583178479Sjb break; 1584178479Sjb 1585178479Sjb case DT_TOK_DEREF: 1586178479Sjb dt_cg_node(dnp->dn_child, dlp, drp); 1587178479Sjb dnp->dn_reg = dnp->dn_child->dn_reg; 1588178479Sjb 1589178479Sjb if (!(dnp->dn_flags & DT_NF_REF)) { 1590178479Sjb uint_t ubit = dnp->dn_flags & DT_NF_USERLAND; 1591178479Sjb 1592178479Sjb /* 1593178479Sjb * Save and restore DT_NF_USERLAND across dt_cg_load(): 1594178479Sjb * we need the sign bit from dnp and the user bit from 1595178479Sjb * dnp->dn_child in order to get the proper opcode. 1596178479Sjb */ 1597178479Sjb dnp->dn_flags |= 1598178479Sjb (dnp->dn_child->dn_flags & DT_NF_USERLAND); 1599178479Sjb 1600178479Sjb instr = DIF_INSTR_LOAD(dt_cg_load(dnp, ctfp, 1601178479Sjb dnp->dn_type), dnp->dn_reg, dnp->dn_reg); 1602178479Sjb 1603178479Sjb dnp->dn_flags &= ~DT_NF_USERLAND; 1604178479Sjb dnp->dn_flags |= ubit; 1605178479Sjb 1606178479Sjb dt_irlist_append(dlp, 1607178479Sjb dt_cg_node_alloc(DT_LBL_NONE, instr)); 1608178479Sjb } 1609178479Sjb break; 1610178479Sjb 1611178479Sjb case DT_TOK_ADDROF: { 1612178479Sjb uint_t rbit = dnp->dn_child->dn_flags & DT_NF_REF; 1613178479Sjb 1614178479Sjb dnp->dn_child->dn_flags |= DT_NF_REF; /* force pass-by-ref */ 1615178479Sjb dt_cg_node(dnp->dn_child, dlp, drp); 1616178479Sjb dnp->dn_reg = dnp->dn_child->dn_reg; 1617178479Sjb 1618178479Sjb dnp->dn_child->dn_flags &= ~DT_NF_REF; 1619178479Sjb dnp->dn_child->dn_flags |= rbit; 1620178479Sjb break; 1621178479Sjb } 1622178479Sjb 1623178479Sjb case DT_TOK_SIZEOF: { 1624178479Sjb size_t size = dt_node_sizeof(dnp->dn_child); 1625178479Sjb 1626178479Sjb if ((dnp->dn_reg = dt_regset_alloc(drp)) == -1) 1627178479Sjb longjmp(yypcb->pcb_jmpbuf, EDT_NOREG); 1628178479Sjb 1629178479Sjb assert(size != 0); 1630178479Sjb dt_cg_setx(dlp, dnp->dn_reg, size); 1631178479Sjb break; 1632178479Sjb } 1633178479Sjb 1634178479Sjb case DT_TOK_STRINGOF: 1635178479Sjb dt_cg_node(dnp->dn_child, dlp, drp); 1636178479Sjb dnp->dn_reg = dnp->dn_child->dn_reg; 1637178479Sjb break; 1638178479Sjb 1639178479Sjb case DT_TOK_XLATE: 1640178479Sjb /* 1641178479Sjb * An xlate operator appears in either an XLATOR, indicating a 1642178479Sjb * reference to a dynamic translator, or an OP2, indicating 1643178479Sjb * use of the xlate operator in the user's program. For the 1644178479Sjb * dynamic case, generate an xlate opcode with a reference to 1645178479Sjb * the corresponding member, pre-computed for us in dn_members. 1646178479Sjb */ 1647178479Sjb if (dnp->dn_kind == DT_NODE_XLATOR) { 1648178479Sjb dt_xlator_t *dxp = dnp->dn_xlator; 1649178479Sjb 1650178479Sjb assert(dxp->dx_ident->di_flags & DT_IDFLG_CGREG); 1651178479Sjb assert(dxp->dx_ident->di_id != 0); 1652178479Sjb 1653178479Sjb if ((dnp->dn_reg = dt_regset_alloc(drp)) == -1) 1654178479Sjb longjmp(yypcb->pcb_jmpbuf, EDT_NOREG); 1655178479Sjb 1656178479Sjb if (dxp->dx_arg == -1) { 1657178479Sjb instr = DIF_INSTR_MOV( 1658178479Sjb dxp->dx_ident->di_id, dnp->dn_reg); 1659178479Sjb dt_irlist_append(dlp, 1660178479Sjb dt_cg_node_alloc(DT_LBL_NONE, instr)); 1661178479Sjb op = DIF_OP_XLATE; 1662178479Sjb } else 1663178479Sjb op = DIF_OP_XLARG; 1664178479Sjb 1665178479Sjb instr = DIF_INSTR_XLATE(op, 0, dnp->dn_reg); 1666178479Sjb dt_irlist_append(dlp, 1667178479Sjb dt_cg_node_alloc(DT_LBL_NONE, instr)); 1668178479Sjb 1669178479Sjb dlp->dl_last->di_extern = dnp->dn_xmember; 1670178479Sjb break; 1671178479Sjb } 1672178479Sjb 1673178479Sjb assert(dnp->dn_kind == DT_NODE_OP2); 1674178479Sjb dt_cg_node(dnp->dn_right, dlp, drp); 1675178479Sjb dnp->dn_reg = dnp->dn_right->dn_reg; 1676178479Sjb break; 1677178479Sjb 1678178479Sjb case DT_TOK_LPAR: 1679178479Sjb dt_cg_node(dnp->dn_right, dlp, drp); 1680178479Sjb dnp->dn_reg = dnp->dn_right->dn_reg; 1681178479Sjb dt_cg_typecast(dnp->dn_right, dnp, dlp, drp); 1682178479Sjb break; 1683178479Sjb 1684178479Sjb case DT_TOK_PTR: 1685178479Sjb case DT_TOK_DOT: 1686178479Sjb assert(dnp->dn_right->dn_kind == DT_NODE_IDENT); 1687178479Sjb dt_cg_node(dnp->dn_left, dlp, drp); 1688178479Sjb 1689178479Sjb /* 1690178479Sjb * If the left-hand side of PTR or DOT is a dynamic variable, 1691178479Sjb * we expect it to be the output of a D translator. In this 1692178479Sjb * case, we look up the parse tree corresponding to the member 1693178479Sjb * that is being accessed and run the code generator over it. 1694178479Sjb * We then cast the result as if by the assignment operator. 1695178479Sjb */ 1696178479Sjb if ((idp = dt_node_resolve( 1697178479Sjb dnp->dn_left, DT_IDENT_XLSOU)) != NULL || 1698178479Sjb (idp = dt_node_resolve( 1699178479Sjb dnp->dn_left, DT_IDENT_XLPTR)) != NULL) { 1700178479Sjb 1701178479Sjb dt_xlator_t *dxp; 1702178479Sjb dt_node_t *mnp; 1703178479Sjb 1704178479Sjb dxp = idp->di_data; 1705178479Sjb mnp = dt_xlator_member(dxp, dnp->dn_right->dn_string); 1706178479Sjb assert(mnp != NULL); 1707178479Sjb 1708178479Sjb dxp->dx_ident->di_flags |= DT_IDFLG_CGREG; 1709178479Sjb dxp->dx_ident->di_id = dnp->dn_left->dn_reg; 1710178479Sjb 1711178479Sjb dt_cg_node(mnp->dn_membexpr, dlp, drp); 1712178479Sjb dnp->dn_reg = mnp->dn_membexpr->dn_reg; 1713178479Sjb dt_cg_typecast(mnp->dn_membexpr, dnp, dlp, drp); 1714178479Sjb 1715178479Sjb dxp->dx_ident->di_flags &= ~DT_IDFLG_CGREG; 1716178479Sjb dxp->dx_ident->di_id = 0; 1717178479Sjb 1718178479Sjb if (dnp->dn_left->dn_reg != -1) 1719178479Sjb dt_regset_free(drp, dnp->dn_left->dn_reg); 1720178479Sjb break; 1721178479Sjb } 1722178479Sjb 1723178479Sjb ctfp = dnp->dn_left->dn_ctfp; 1724178479Sjb type = ctf_type_resolve(ctfp, dnp->dn_left->dn_type); 1725178479Sjb 1726178479Sjb if (dnp->dn_op == DT_TOK_PTR) { 1727178479Sjb type = ctf_type_reference(ctfp, type); 1728178479Sjb type = ctf_type_resolve(ctfp, type); 1729178479Sjb } 1730178479Sjb 1731178479Sjb if ((ctfp = dt_cg_membinfo(octfp = ctfp, type, 1732178479Sjb dnp->dn_right->dn_string, &m)) == NULL) { 1733178479Sjb yypcb->pcb_hdl->dt_ctferr = ctf_errno(octfp); 1734178479Sjb longjmp(yypcb->pcb_jmpbuf, EDT_CTF); 1735178479Sjb } 1736178479Sjb 1737178479Sjb if (m.ctm_offset != 0) { 1738178479Sjb if ((reg = dt_regset_alloc(drp)) == -1) 1739178479Sjb longjmp(yypcb->pcb_jmpbuf, EDT_NOREG); 1740178479Sjb 1741178479Sjb /* 1742178479Sjb * If the offset is not aligned on a byte boundary, it 1743178479Sjb * is a bit-field member and we will extract the value 1744178479Sjb * bits below after we generate the appropriate load. 1745178479Sjb */ 1746178479Sjb dt_cg_setx(dlp, reg, m.ctm_offset / NBBY); 1747178479Sjb 1748178479Sjb instr = DIF_INSTR_FMT(DIF_OP_ADD, 1749178479Sjb dnp->dn_left->dn_reg, reg, dnp->dn_left->dn_reg); 1750178479Sjb 1751178479Sjb dt_irlist_append(dlp, 1752178479Sjb dt_cg_node_alloc(DT_LBL_NONE, instr)); 1753178479Sjb dt_regset_free(drp, reg); 1754178479Sjb } 1755178479Sjb 1756178479Sjb if (!(dnp->dn_flags & DT_NF_REF)) { 1757178479Sjb uint_t ubit = dnp->dn_flags & DT_NF_USERLAND; 1758178479Sjb 1759178479Sjb /* 1760178479Sjb * Save and restore DT_NF_USERLAND across dt_cg_load(): 1761178479Sjb * we need the sign bit from dnp and the user bit from 1762178479Sjb * dnp->dn_left in order to get the proper opcode. 1763178479Sjb */ 1764178479Sjb dnp->dn_flags |= 1765178479Sjb (dnp->dn_left->dn_flags & DT_NF_USERLAND); 1766178479Sjb 1767178479Sjb instr = DIF_INSTR_LOAD(dt_cg_load(dnp, 1768178479Sjb ctfp, m.ctm_type), dnp->dn_left->dn_reg, 1769178479Sjb dnp->dn_left->dn_reg); 1770178479Sjb 1771178479Sjb dnp->dn_flags &= ~DT_NF_USERLAND; 1772178479Sjb dnp->dn_flags |= ubit; 1773178479Sjb 1774178479Sjb dt_irlist_append(dlp, 1775178479Sjb dt_cg_node_alloc(DT_LBL_NONE, instr)); 1776178479Sjb 1777178479Sjb if (dnp->dn_flags & DT_NF_BITFIELD) 1778178479Sjb dt_cg_field_get(dnp, dlp, drp, ctfp, &m); 1779178479Sjb } 1780178479Sjb 1781178479Sjb dnp->dn_reg = dnp->dn_left->dn_reg; 1782178479Sjb break; 1783178479Sjb 1784178479Sjb case DT_TOK_STRING: 1785178479Sjb if ((dnp->dn_reg = dt_regset_alloc(drp)) == -1) 1786178479Sjb longjmp(yypcb->pcb_jmpbuf, EDT_NOREG); 1787178479Sjb 1788178479Sjb assert(dnp->dn_kind == DT_NODE_STRING); 1789178479Sjb stroff = dt_strtab_insert(yypcb->pcb_strtab, dnp->dn_string); 1790178479Sjb 1791178479Sjb if (stroff == -1L) 1792178479Sjb longjmp(yypcb->pcb_jmpbuf, EDT_NOMEM); 1793178479Sjb if (stroff > DIF_STROFF_MAX) 1794178479Sjb longjmp(yypcb->pcb_jmpbuf, EDT_STR2BIG); 1795178479Sjb 1796178479Sjb instr = DIF_INSTR_SETS((ulong_t)stroff, dnp->dn_reg); 1797178479Sjb dt_irlist_append(dlp, dt_cg_node_alloc(DT_LBL_NONE, instr)); 1798178479Sjb break; 1799178479Sjb 1800178479Sjb case DT_TOK_IDENT: 1801178479Sjb /* 1802178479Sjb * If the specified identifier is a variable on which we have 1803178479Sjb * set the code generator register flag, then this variable 1804178479Sjb * has already had code generated for it and saved in di_id. 1805178479Sjb * Allocate a new register and copy the existing value to it. 1806178479Sjb */ 1807178479Sjb if (dnp->dn_kind == DT_NODE_VAR && 1808178479Sjb (dnp->dn_ident->di_flags & DT_IDFLG_CGREG)) { 1809178479Sjb if ((dnp->dn_reg = dt_regset_alloc(drp)) == -1) 1810178479Sjb longjmp(yypcb->pcb_jmpbuf, EDT_NOREG); 1811178479Sjb instr = DIF_INSTR_MOV(dnp->dn_ident->di_id, 1812178479Sjb dnp->dn_reg); 1813178479Sjb dt_irlist_append(dlp, 1814178479Sjb dt_cg_node_alloc(DT_LBL_NONE, instr)); 1815178479Sjb break; 1816178479Sjb } 1817178479Sjb 1818178479Sjb /* 1819178479Sjb * Identifiers can represent function calls, variable refs, or 1820178479Sjb * symbols. First we check for inlined variables, and handle 1821178479Sjb * them by generating code for the inline parse tree. 1822178479Sjb */ 1823178479Sjb if (dnp->dn_kind == DT_NODE_VAR && 1824178479Sjb (dnp->dn_ident->di_flags & DT_IDFLG_INLINE)) { 1825178479Sjb dt_cg_inline(dnp, dlp, drp); 1826178479Sjb break; 1827178479Sjb } 1828178479Sjb 1829178479Sjb switch (dnp->dn_kind) { 1830178479Sjb case DT_NODE_FUNC: { 1831178479Sjb dtrace_hdl_t *dtp = yypcb->pcb_hdl; 1832178479Sjb 1833178479Sjb if ((idp = dnp->dn_ident)->di_kind != DT_IDENT_FUNC) { 1834178479Sjb dnerror(dnp, D_CG_EXPR, "%s %s( ) may not be " 1835178479Sjb "called from a D expression (D program " 1836178479Sjb "context required)\n", 1837178479Sjb dt_idkind_name(idp->di_kind), idp->di_name); 1838178479Sjb } 1839178479Sjb 1840178479Sjb switch (idp->di_id) { 1841178479Sjb case DIF_SUBR_TYPEREF: 1842178479Sjb dt_cg_func_typeref(dtp, dnp); 1843178479Sjb break; 1844178479Sjb 1845178479Sjb default: 1846178479Sjb break; 1847178479Sjb } 1848178479Sjb 1849178479Sjb dt_cg_arglist(dnp->dn_ident, dnp->dn_args, dlp, drp); 1850178479Sjb 1851178479Sjb if ((dnp->dn_reg = dt_regset_alloc(drp)) == -1) 1852178479Sjb longjmp(yypcb->pcb_jmpbuf, EDT_NOREG); 1853178479Sjb 1854178479Sjb instr = DIF_INSTR_CALL( 1855178479Sjb dnp->dn_ident->di_id, dnp->dn_reg); 1856178479Sjb 1857178479Sjb dt_irlist_append(dlp, 1858178479Sjb dt_cg_node_alloc(DT_LBL_NONE, instr)); 1859178479Sjb 1860178479Sjb break; 1861178479Sjb } 1862178479Sjb 1863178479Sjb case DT_NODE_VAR: 1864178479Sjb if (dnp->dn_ident->di_kind == DT_IDENT_XLSOU || 1865178479Sjb dnp->dn_ident->di_kind == DT_IDENT_XLPTR) { 1866178479Sjb /* 1867178479Sjb * This can only happen if we have translated 1868178479Sjb * args[]. See dt_idcook_args() for details. 1869178479Sjb */ 1870178479Sjb assert(dnp->dn_ident->di_id == DIF_VAR_ARGS); 1871178479Sjb dt_cg_array_op(dnp, dlp, drp); 1872178479Sjb break; 1873178479Sjb } 1874178479Sjb 1875178479Sjb if (dnp->dn_ident->di_kind == DT_IDENT_ARRAY) { 1876178479Sjb if (dnp->dn_ident->di_id > DIF_VAR_ARRAY_MAX) 1877178479Sjb dt_cg_assoc_op(dnp, dlp, drp); 1878178479Sjb else 1879178479Sjb dt_cg_array_op(dnp, dlp, drp); 1880178479Sjb break; 1881178479Sjb } 1882178479Sjb 1883178479Sjb if ((dnp->dn_reg = dt_regset_alloc(drp)) == -1) 1884178479Sjb longjmp(yypcb->pcb_jmpbuf, EDT_NOREG); 1885178479Sjb 1886178479Sjb if (dnp->dn_ident->di_flags & DT_IDFLG_LOCAL) 1887178479Sjb op = DIF_OP_LDLS; 1888178479Sjb else if (dnp->dn_ident->di_flags & DT_IDFLG_TLS) 1889178479Sjb op = DIF_OP_LDTS; 1890178479Sjb else 1891178479Sjb op = DIF_OP_LDGS; 1892178479Sjb 1893178479Sjb dnp->dn_ident->di_flags |= DT_IDFLG_DIFR; 1894178479Sjb 1895178479Sjb instr = DIF_INSTR_LDV(op, 1896178479Sjb dnp->dn_ident->di_id, dnp->dn_reg); 1897178479Sjb 1898178479Sjb dt_irlist_append(dlp, 1899178479Sjb dt_cg_node_alloc(DT_LBL_NONE, instr)); 1900178479Sjb break; 1901178479Sjb 1902178479Sjb case DT_NODE_SYM: { 1903178479Sjb dtrace_hdl_t *dtp = yypcb->pcb_hdl; 1904178479Sjb dtrace_syminfo_t *sip = dnp->dn_ident->di_data; 1905178479Sjb GElf_Sym sym; 1906178479Sjb 1907178479Sjb if (dtrace_lookup_by_name(dtp, 1908178479Sjb sip->dts_object, sip->dts_name, &sym, NULL) == -1) { 1909178479Sjb xyerror(D_UNKNOWN, "cg failed for symbol %s`%s:" 1910178479Sjb " %s\n", sip->dts_object, sip->dts_name, 1911178479Sjb dtrace_errmsg(dtp, dtrace_errno(dtp))); 1912178479Sjb } 1913178479Sjb 1914178479Sjb if ((dnp->dn_reg = dt_regset_alloc(drp)) == -1) 1915178479Sjb longjmp(yypcb->pcb_jmpbuf, EDT_NOREG); 1916178479Sjb 1917178479Sjb dt_cg_xsetx(dlp, dnp->dn_ident, 1918178479Sjb DT_LBL_NONE, dnp->dn_reg, sym.st_value); 1919178479Sjb 1920178479Sjb if (!(dnp->dn_flags & DT_NF_REF)) { 1921178479Sjb instr = DIF_INSTR_LOAD(dt_cg_load(dnp, ctfp, 1922178479Sjb dnp->dn_type), dnp->dn_reg, dnp->dn_reg); 1923178479Sjb dt_irlist_append(dlp, 1924178479Sjb dt_cg_node_alloc(DT_LBL_NONE, instr)); 1925178479Sjb } 1926178479Sjb break; 1927178479Sjb } 1928178479Sjb 1929178479Sjb default: 1930178479Sjb xyerror(D_UNKNOWN, "internal error -- node type %u is " 1931178479Sjb "not valid for an identifier\n", dnp->dn_kind); 1932178479Sjb } 1933178479Sjb break; 1934178479Sjb 1935178479Sjb case DT_TOK_INT: 1936178479Sjb if ((dnp->dn_reg = dt_regset_alloc(drp)) == -1) 1937178479Sjb longjmp(yypcb->pcb_jmpbuf, EDT_NOREG); 1938178479Sjb 1939178479Sjb dt_cg_setx(dlp, dnp->dn_reg, dnp->dn_value); 1940178479Sjb break; 1941178479Sjb 1942178479Sjb default: 1943178479Sjb xyerror(D_UNKNOWN, "internal error -- token type %u is not a " 1944178479Sjb "valid D compilation token\n", dnp->dn_op); 1945178479Sjb } 1946178479Sjb} 1947178479Sjb 1948178479Sjbvoid 1949178479Sjbdt_cg(dt_pcb_t *pcb, dt_node_t *dnp) 1950178479Sjb{ 1951178479Sjb dif_instr_t instr; 1952178479Sjb dt_xlator_t *dxp; 1953178479Sjb 1954178479Sjb if (pcb->pcb_regs == NULL && (pcb->pcb_regs = 1955178479Sjb dt_regset_create(pcb->pcb_hdl->dt_conf.dtc_difintregs)) == NULL) 1956178479Sjb longjmp(pcb->pcb_jmpbuf, EDT_NOMEM); 1957178479Sjb 1958178479Sjb dt_regset_reset(pcb->pcb_regs); 1959178479Sjb (void) dt_regset_alloc(pcb->pcb_regs); /* allocate %r0 */ 1960178479Sjb 1961178479Sjb if (pcb->pcb_inttab != NULL) 1962178479Sjb dt_inttab_destroy(pcb->pcb_inttab); 1963178479Sjb 1964178479Sjb if ((pcb->pcb_inttab = dt_inttab_create(yypcb->pcb_hdl)) == NULL) 1965178479Sjb longjmp(pcb->pcb_jmpbuf, EDT_NOMEM); 1966178479Sjb 1967178479Sjb if (pcb->pcb_strtab != NULL) 1968178479Sjb dt_strtab_destroy(pcb->pcb_strtab); 1969178479Sjb 1970178479Sjb if ((pcb->pcb_strtab = dt_strtab_create(BUFSIZ)) == NULL) 1971178479Sjb longjmp(pcb->pcb_jmpbuf, EDT_NOMEM); 1972178479Sjb 1973178479Sjb dt_irlist_destroy(&pcb->pcb_ir); 1974178479Sjb dt_irlist_create(&pcb->pcb_ir); 1975178479Sjb 1976178479Sjb assert(pcb->pcb_dret == NULL); 1977178479Sjb pcb->pcb_dret = dnp; 1978178479Sjb 1979178479Sjb if (dt_node_is_dynamic(dnp)) { 1980178479Sjb dnerror(dnp, D_CG_DYN, "expression cannot evaluate to result " 1981178479Sjb "of dynamic type\n"); 1982178479Sjb } 1983178479Sjb 1984178479Sjb /* 1985178479Sjb * If we're generating code for a translator body, assign the input 1986178479Sjb * parameter to the first available register (i.e. caller passes %r1). 1987178479Sjb */ 1988178479Sjb if (dnp->dn_kind == DT_NODE_MEMBER) { 1989178479Sjb dxp = dnp->dn_membxlator; 1990178479Sjb dnp = dnp->dn_membexpr; 1991178479Sjb 1992178479Sjb dxp->dx_ident->di_flags |= DT_IDFLG_CGREG; 1993178479Sjb dxp->dx_ident->di_id = dt_regset_alloc(pcb->pcb_regs); 1994178479Sjb } 1995178479Sjb 1996178479Sjb dt_cg_node(dnp, &pcb->pcb_ir, pcb->pcb_regs); 1997178479Sjb instr = DIF_INSTR_RET(dnp->dn_reg); 1998178479Sjb dt_regset_free(pcb->pcb_regs, dnp->dn_reg); 1999178479Sjb dt_irlist_append(&pcb->pcb_ir, dt_cg_node_alloc(DT_LBL_NONE, instr)); 2000178479Sjb 2001178479Sjb if (dnp->dn_kind == DT_NODE_MEMBER) { 2002178479Sjb dt_regset_free(pcb->pcb_regs, dxp->dx_ident->di_id); 2003178479Sjb dxp->dx_ident->di_id = 0; 2004178479Sjb dxp->dx_ident->di_flags &= ~DT_IDFLG_CGREG; 2005178479Sjb } 2006178479Sjb} 2007