1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. 24 * Copyright (c) 2011 by Delphix. All rights reserved. 25 * Copyright (c) 2013, Joyent, Inc. All rights reserved. 26 */ 27 28 #include <sys/types.h> 29 #ifdef illumos 30 #include <sys/sysmacros.h> 31 #endif 32 33 #include <strings.h> 34 #ifdef illumos 35 #include <alloca.h> 36 #endif 37 #include <assert.h> 38 #include <stdlib.h> 39 #include <errno.h> 40 #include <limits.h> 41 42 #include <dt_impl.h> 43 #include <dt_strtab.h> 44 #include <dt_program.h> 45 #include <dt_provider.h> 46 #include <dt_xlator.h> 47 #include <dt_dof.h> 48 49 void 50 dt_dof_init(dtrace_hdl_t *dtp) 51 { 52 dt_dof_t *ddo = &dtp->dt_dof; 53 54 ddo->ddo_hdl = dtp; 55 ddo->ddo_nsecs = 0; 56 ddo->ddo_strsec = DOF_SECIDX_NONE; 57 ddo->ddo_xlimport = NULL; 58 ddo->ddo_xlexport = NULL; 59 60 dt_buf_create(dtp, &ddo->ddo_secs, "section headers", 0); 61 dt_buf_create(dtp, &ddo->ddo_strs, "string table", 0); 62 dt_buf_create(dtp, &ddo->ddo_ldata, "loadable data", 0); 63 dt_buf_create(dtp, &ddo->ddo_udata, "unloadable data", 0); 64 65 dt_buf_create(dtp, &ddo->ddo_probes, "probe data", 0); 66 dt_buf_create(dtp, &ddo->ddo_args, "probe args", 0); 67 dt_buf_create(dtp, &ddo->ddo_offs, "probe offs", 0); 68 dt_buf_create(dtp, &ddo->ddo_enoffs, "probe is-enabled offs", 0); 69 dt_buf_create(dtp, &ddo->ddo_rels, "probe rels", 0); 70 71 dt_buf_create(dtp, &ddo->ddo_xlms, "xlate members", 0); 72 } 73 74 void 75 dt_dof_fini(dtrace_hdl_t *dtp) 76 { 77 dt_dof_t *ddo = &dtp->dt_dof; 78 79 dt_free(dtp, ddo->ddo_xlimport); 80 dt_free(dtp, ddo->ddo_xlexport); 81 82 dt_buf_destroy(dtp, &ddo->ddo_secs); 83 dt_buf_destroy(dtp, &ddo->ddo_strs); 84 dt_buf_destroy(dtp, &ddo->ddo_ldata); 85 dt_buf_destroy(dtp, &ddo->ddo_udata); 86 87 dt_buf_destroy(dtp, &ddo->ddo_probes); 88 dt_buf_destroy(dtp, &ddo->ddo_args); 89 dt_buf_destroy(dtp, &ddo->ddo_offs); 90 dt_buf_destroy(dtp, &ddo->ddo_enoffs); 91 dt_buf_destroy(dtp, &ddo->ddo_rels); 92 93 dt_buf_destroy(dtp, &ddo->ddo_xlms); 94 } 95 96 static int 97 dt_dof_reset(dtrace_hdl_t *dtp, dtrace_prog_t *pgp) 98 { 99 dt_dof_t *ddo = &dtp->dt_dof; 100 uint_t i, nx = dtp->dt_xlatorid; 101 102 assert(ddo->ddo_hdl == dtp); 103 ddo->ddo_pgp = pgp; 104 105 ddo->ddo_nsecs = 0; 106 ddo->ddo_strsec = DOF_SECIDX_NONE; 107 108 dt_free(dtp, ddo->ddo_xlimport); 109 dt_free(dtp, ddo->ddo_xlexport); 110 111 ddo->ddo_xlimport = dt_alloc(dtp, sizeof (dof_secidx_t) * nx); 112 ddo->ddo_xlexport = dt_alloc(dtp, sizeof (dof_secidx_t) * nx); 113 114 if (nx != 0 && (ddo->ddo_xlimport == NULL || ddo->ddo_xlexport == NULL)) 115 return (-1); /* errno is set for us */ 116 117 for (i = 0; i < nx; i++) { 118 ddo->ddo_xlimport[i] = DOF_SECIDX_NONE; 119 ddo->ddo_xlexport[i] = DOF_SECIDX_NONE; 120 } 121 122 dt_buf_reset(dtp, &ddo->ddo_secs); 123 dt_buf_reset(dtp, &ddo->ddo_strs); 124 dt_buf_reset(dtp, &ddo->ddo_ldata); 125 dt_buf_reset(dtp, &ddo->ddo_udata); 126 127 dt_buf_reset(dtp, &ddo->ddo_probes); 128 dt_buf_reset(dtp, &ddo->ddo_args); 129 dt_buf_reset(dtp, &ddo->ddo_offs); 130 dt_buf_reset(dtp, &ddo->ddo_enoffs); 131 dt_buf_reset(dtp, &ddo->ddo_rels); 132 133 dt_buf_reset(dtp, &ddo->ddo_xlms); 134 return (0); 135 } 136 137 /* 138 * Add a loadable DOF section to the file using the specified data buffer and 139 * the specified DOF section attributes. DOF_SECF_LOAD must be set in flags. 140 * If 'data' is NULL, the caller is responsible for manipulating the ldata buf. 141 */ 142 static dof_secidx_t 143 dof_add_lsect(dt_dof_t *ddo, const void *data, uint32_t type, 144 uint32_t align, uint32_t flags, uint32_t entsize, uint64_t size) 145 { 146 dtrace_hdl_t *dtp = ddo->ddo_hdl; 147 dof_sec_t s; 148 149 s.dofs_type = type; 150 s.dofs_align = align; 151 s.dofs_flags = flags | DOF_SECF_LOAD; 152 s.dofs_entsize = entsize; 153 s.dofs_offset = dt_buf_offset(&ddo->ddo_ldata, align); 154 s.dofs_size = size; 155 156 dt_buf_write(dtp, &ddo->ddo_secs, &s, sizeof (s), sizeof (uint64_t)); 157 158 if (data != NULL) 159 dt_buf_write(dtp, &ddo->ddo_ldata, data, size, align); 160 161 return (ddo->ddo_nsecs++); 162 } 163 164 /* 165 * Add an unloadable DOF section to the file using the specified data buffer 166 * and DOF section attributes. DOF_SECF_LOAD must *not* be set in flags. 167 * If 'data' is NULL, the caller is responsible for manipulating the udata buf. 168 */ 169 static dof_secidx_t 170 dof_add_usect(dt_dof_t *ddo, const void *data, uint32_t type, 171 uint32_t align, uint32_t flags, uint32_t entsize, uint64_t size) 172 { 173 dtrace_hdl_t *dtp = ddo->ddo_hdl; 174 dof_sec_t s; 175 176 s.dofs_type = type; 177 s.dofs_align = align; 178 s.dofs_flags = flags & ~DOF_SECF_LOAD; 179 s.dofs_entsize = entsize; 180 s.dofs_offset = dt_buf_offset(&ddo->ddo_udata, align); 181 s.dofs_size = size; 182 183 dt_buf_write(dtp, &ddo->ddo_secs, &s, sizeof (s), sizeof (uint64_t)); 184 185 if (data != NULL) 186 dt_buf_write(dtp, &ddo->ddo_udata, data, size, align); 187 188 return (ddo->ddo_nsecs++); 189 } 190 191 /* 192 * Add a string to the global string table associated with the DOF. The offset 193 * of the string is returned as an index into the string table. 194 */ 195 static dof_stridx_t 196 dof_add_string(dt_dof_t *ddo, const char *s) 197 { 198 dt_buf_t *bp = &ddo->ddo_strs; 199 dof_stridx_t i = dt_buf_len(bp); 200 201 if (i != 0 && (s == NULL || *s == '\0')) 202 return (0); /* string table has \0 at offset 0 */ 203 204 dt_buf_write(ddo->ddo_hdl, bp, s, strlen(s) + 1, sizeof (char)); 205 return (i); 206 } 207 208 static dof_attr_t 209 dof_attr(const dtrace_attribute_t *ap) 210 { 211 return (DOF_ATTR(ap->dtat_name, ap->dtat_data, ap->dtat_class)); 212 } 213 214 static dof_secidx_t 215 dof_add_difo(dt_dof_t *ddo, const dtrace_difo_t *dp) 216 { 217 dof_secidx_t dsecs[5]; /* enough for all possible DIFO sections */ 218 uint_t nsecs = 0; 219 220 dof_difohdr_t *dofd; 221 dof_relohdr_t dofr; 222 dof_secidx_t relsec; 223 224 dof_secidx_t strsec = DOF_SECIDX_NONE; 225 dof_secidx_t intsec = DOF_SECIDX_NONE; 226 dof_secidx_t hdrsec = DOF_SECIDX_NONE; 227 228 if (dp->dtdo_buf != NULL) { 229 dsecs[nsecs++] = dof_add_lsect(ddo, dp->dtdo_buf, 230 DOF_SECT_DIF, sizeof (dif_instr_t), 0, 231 sizeof (dif_instr_t), sizeof (dif_instr_t) * dp->dtdo_len); 232 } 233 234 if (dp->dtdo_inttab != NULL) { 235 dsecs[nsecs++] = intsec = dof_add_lsect(ddo, dp->dtdo_inttab, 236 DOF_SECT_INTTAB, sizeof (uint64_t), 0, 237 sizeof (uint64_t), sizeof (uint64_t) * dp->dtdo_intlen); 238 } 239 240 if (dp->dtdo_strtab != NULL) { 241 dsecs[nsecs++] = strsec = dof_add_lsect(ddo, dp->dtdo_strtab, 242 DOF_SECT_STRTAB, sizeof (char), 0, 0, dp->dtdo_strlen); 243 } 244 245 if (dp->dtdo_vartab != NULL) { 246 dsecs[nsecs++] = dof_add_lsect(ddo, dp->dtdo_vartab, 247 DOF_SECT_VARTAB, sizeof (uint_t), 0, sizeof (dtrace_difv_t), 248 sizeof (dtrace_difv_t) * dp->dtdo_varlen); 249 } 250 251 if (dp->dtdo_xlmtab != NULL) { 252 dof_xlref_t *xlt, *xlp; 253 dt_node_t **pnp; 254 255 xlt = alloca(sizeof (dof_xlref_t) * dp->dtdo_xlmlen); 256 pnp = dp->dtdo_xlmtab; 257 258 /* 259 * dtdo_xlmtab contains pointers to the translator members. 260 * The translator itself is in sect ddo_xlimport[dxp->dx_id]. 261 * The XLMEMBERS entries are in order by their dn_membid, so 262 * the member section offset is the population count of bits 263 * in ddo_pgp->dp_xlrefs[] up to and not including dn_membid. 264 */ 265 for (xlp = xlt; xlp < xlt + dp->dtdo_xlmlen; xlp++) { 266 dt_node_t *dnp = *pnp++; 267 dt_xlator_t *dxp = dnp->dn_membexpr->dn_xlator; 268 269 xlp->dofxr_xlator = ddo->ddo_xlimport[dxp->dx_id]; 270 xlp->dofxr_member = dt_popcb( 271 ddo->ddo_pgp->dp_xrefs[dxp->dx_id], dnp->dn_membid); 272 xlp->dofxr_argn = (uint32_t)dxp->dx_arg; 273 } 274 275 dsecs[nsecs++] = dof_add_lsect(ddo, xlt, DOF_SECT_XLTAB, 276 sizeof (dof_secidx_t), 0, sizeof (dof_xlref_t), 277 sizeof (dof_xlref_t) * dp->dtdo_xlmlen); 278 } 279 280 /* 281 * Copy the return type and the array of section indices that form the 282 * DIFO into a single dof_difohdr_t and then add DOF_SECT_DIFOHDR. 283 */ 284 assert(nsecs <= sizeof (dsecs) / sizeof (dsecs[0])); 285 dofd = alloca(sizeof (dtrace_diftype_t) + sizeof (dsecs)); 286 bcopy(&dp->dtdo_rtype, &dofd->dofd_rtype, sizeof (dtrace_diftype_t)); 287 bcopy(dsecs, &dofd->dofd_links, sizeof (dof_secidx_t) * nsecs); 288 289 hdrsec = dof_add_lsect(ddo, dofd, DOF_SECT_DIFOHDR, 290 sizeof (dof_secidx_t), 0, 0, 291 sizeof (dtrace_diftype_t) + sizeof (dof_secidx_t) * nsecs); 292 293 /* 294 * Add any other sections related to dtrace_difo_t. These are not 295 * referenced in dof_difohdr_t because they are not used by emulation. 296 */ 297 if (dp->dtdo_kreltab != NULL) { 298 relsec = dof_add_lsect(ddo, dp->dtdo_kreltab, DOF_SECT_RELTAB, 299 sizeof (uint64_t), 0, sizeof (dof_relodesc_t), 300 sizeof (dof_relodesc_t) * dp->dtdo_krelen); 301 302 /* 303 * This code assumes the target of all relocations is the 304 * integer table 'intsec' (DOF_SECT_INTTAB). If other sections 305 * need relocation in the future this will need to change. 306 */ 307 dofr.dofr_strtab = strsec; 308 dofr.dofr_relsec = relsec; 309 dofr.dofr_tgtsec = intsec; 310 311 (void) dof_add_lsect(ddo, &dofr, DOF_SECT_KRELHDR, 312 sizeof (dof_secidx_t), 0, 0, sizeof (dof_relohdr_t)); 313 } 314 315 if (dp->dtdo_ureltab != NULL) { 316 relsec = dof_add_lsect(ddo, dp->dtdo_ureltab, DOF_SECT_RELTAB, 317 sizeof (uint64_t), 0, sizeof (dof_relodesc_t), 318 sizeof (dof_relodesc_t) * dp->dtdo_urelen); 319 320 /* 321 * This code assumes the target of all relocations is the 322 * integer table 'intsec' (DOF_SECT_INTTAB). If other sections 323 * need relocation in the future this will need to change. 324 */ 325 dofr.dofr_strtab = strsec; 326 dofr.dofr_relsec = relsec; 327 dofr.dofr_tgtsec = intsec; 328 329 (void) dof_add_lsect(ddo, &dofr, DOF_SECT_URELHDR, 330 sizeof (dof_secidx_t), 0, 0, sizeof (dof_relohdr_t)); 331 } 332 333 return (hdrsec); 334 } 335 336 static void 337 dof_add_translator(dt_dof_t *ddo, const dt_xlator_t *dxp, uint_t type) 338 { 339 dtrace_hdl_t *dtp = ddo->ddo_hdl; 340 dof_xlmember_t dofxm; 341 dof_xlator_t dofxl; 342 dof_secidx_t *xst; 343 344 char buf[DT_TYPE_NAMELEN]; 345 dt_node_t *dnp; 346 uint_t i = 0; 347 348 assert(type == DOF_SECT_XLIMPORT || type == DOF_SECT_XLEXPORT); 349 xst = type == DOF_SECT_XLIMPORT ? ddo->ddo_xlimport : ddo->ddo_xlexport; 350 351 if (xst[dxp->dx_id] != DOF_SECIDX_NONE) 352 return; /* translator has already been emitted */ 353 354 dt_buf_reset(dtp, &ddo->ddo_xlms); 355 356 /* 357 * Generate an array of dof_xlmember_t's into ddo_xlms. If we are 358 * importing the translator, add only those members referenced by the 359 * program and set the dofxm_difo reference of each member to NONE. If 360 * we're exporting the translator, add all members and a DIFO for each. 361 */ 362 for (dnp = dxp->dx_members; dnp != NULL; dnp = dnp->dn_list, i++) { 363 if (type == DOF_SECT_XLIMPORT) { 364 if (!BT_TEST(ddo->ddo_pgp->dp_xrefs[dxp->dx_id], i)) 365 continue; /* member is not referenced */ 366 dofxm.dofxm_difo = DOF_SECIDX_NONE; 367 } else { 368 dofxm.dofxm_difo = dof_add_difo(ddo, 369 dxp->dx_membdif[dnp->dn_membid]); 370 } 371 372 dofxm.dofxm_name = dof_add_string(ddo, dnp->dn_membname); 373 dt_node_diftype(dtp, dnp, &dofxm.dofxm_type); 374 375 dt_buf_write(dtp, &ddo->ddo_xlms, 376 &dofxm, sizeof (dofxm), sizeof (uint32_t)); 377 } 378 379 dofxl.dofxl_members = dof_add_lsect(ddo, NULL, DOF_SECT_XLMEMBERS, 380 sizeof (uint32_t), 0, sizeof (dofxm), dt_buf_len(&ddo->ddo_xlms)); 381 382 dt_buf_concat(dtp, &ddo->ddo_ldata, &ddo->ddo_xlms, sizeof (uint32_t)); 383 384 dofxl.dofxl_strtab = ddo->ddo_strsec; 385 dofxl.dofxl_argv = dof_add_string(ddo, ctf_type_name( 386 dxp->dx_src_ctfp, dxp->dx_src_type, buf, sizeof (buf))); 387 dofxl.dofxl_argc = 1; 388 dofxl.dofxl_type = dof_add_string(ddo, ctf_type_name( 389 dxp->dx_dst_ctfp, dxp->dx_dst_type, buf, sizeof (buf))); 390 dofxl.dofxl_attr = dof_attr(&dxp->dx_souid.di_attr); 391 392 xst[dxp->dx_id] = dof_add_lsect(ddo, &dofxl, type, 393 sizeof (uint32_t), 0, 0, sizeof (dofxl)); 394 } 395 396 /*ARGSUSED*/ 397 static int 398 dof_add_probe(dt_idhash_t *dhp, dt_ident_t *idp, void *data) 399 { 400 dt_dof_t *ddo = data; 401 dtrace_hdl_t *dtp = ddo->ddo_hdl; 402 dt_probe_t *prp = idp->di_data; 403 404 dof_probe_t dofpr; 405 dof_relodesc_t dofr; 406 dt_probe_instance_t *pip; 407 dt_node_t *dnp; 408 409 char buf[DT_TYPE_NAMELEN]; 410 uint_t i; 411 412 dofpr.dofpr_addr = 0; 413 dofpr.dofpr_name = dof_add_string(ddo, prp->pr_name); 414 dofpr.dofpr_nargv = dt_buf_len(&ddo->ddo_strs); 415 416 for (dnp = prp->pr_nargs; dnp != NULL; dnp = dnp->dn_list) { 417 (void) dof_add_string(ddo, ctf_type_name(dnp->dn_ctfp, 418 dnp->dn_type, buf, sizeof (buf))); 419 } 420 421 dofpr.dofpr_xargv = dt_buf_len(&ddo->ddo_strs); 422 423 for (dnp = prp->pr_xargs; dnp != NULL; dnp = dnp->dn_list) { 424 (void) dof_add_string(ddo, ctf_type_name(dnp->dn_ctfp, 425 dnp->dn_type, buf, sizeof (buf))); 426 } 427 428 dofpr.dofpr_argidx = dt_buf_len(&ddo->ddo_args) / sizeof (uint8_t); 429 430 for (i = 0; i < prp->pr_xargc; i++) { 431 dt_buf_write(dtp, &ddo->ddo_args, &prp->pr_mapping[i], 432 sizeof (uint8_t), sizeof (uint8_t)); 433 } 434 435 dofpr.dofpr_nargc = prp->pr_nargc; 436 dofpr.dofpr_xargc = prp->pr_xargc; 437 dofpr.dofpr_pad1 = 0; 438 dofpr.dofpr_pad2 = 0; 439 440 for (pip = prp->pr_inst; pip != NULL; pip = pip->pi_next) { 441 dt_dprintf("adding probe for %s:%s\n", pip->pi_fname, 442 prp->pr_name); 443 444 dofpr.dofpr_func = dof_add_string(ddo, pip->pi_fname); 445 446 /* 447 * There should be one probe offset or is-enabled probe offset 448 * or else this probe instance won't have been created. The 449 * kernel will reject DOF which has a probe with no offsets. 450 */ 451 assert(pip->pi_noffs + pip->pi_nenoffs > 0); 452 453 dofpr.dofpr_offidx = 454 dt_buf_len(&ddo->ddo_offs) / sizeof (uint32_t); 455 dofpr.dofpr_noffs = pip->pi_noffs; 456 dt_buf_write(dtp, &ddo->ddo_offs, pip->pi_offs, 457 pip->pi_noffs * sizeof (uint32_t), sizeof (uint32_t)); 458 459 dofpr.dofpr_enoffidx = 460 dt_buf_len(&ddo->ddo_enoffs) / sizeof (uint32_t); 461 dofpr.dofpr_nenoffs = pip->pi_nenoffs; 462 dt_buf_write(dtp, &ddo->ddo_enoffs, pip->pi_enoffs, 463 pip->pi_nenoffs * sizeof (uint32_t), sizeof (uint32_t)); 464 465 dofr.dofr_name = dof_add_string(ddo, pip->pi_rname); 466 dofr.dofr_type = DOF_RELO_DOFREL; 467 dofr.dofr_offset = dt_buf_len(&ddo->ddo_probes); 468 dofr.dofr_data = 0; 469 470 dt_buf_write(dtp, &ddo->ddo_rels, &dofr, 471 sizeof (dofr), sizeof (uint64_t)); 472 473 dt_buf_write(dtp, &ddo->ddo_probes, &dofpr, 474 sizeof (dofpr), sizeof (uint64_t)); 475 } 476 477 return (0); 478 } 479 480 static int 481 dof_add_provider(dt_dof_t *ddo, const dt_provider_t *pvp) 482 { 483 dtrace_hdl_t *dtp = ddo->ddo_hdl; 484 dof_provider_t dofpv; 485 dof_relohdr_t dofr; 486 dof_secidx_t *dofs; 487 ulong_t xr, nxr; 488 size_t sz; 489 id_t i; 490 491 if (pvp->pv_flags & DT_PROVIDER_IMPL) { 492 /* 493 * ignore providers that are exported by dtrace(7D) 494 */ 495 return (0); 496 } 497 498 nxr = dt_popcb(pvp->pv_xrefs, pvp->pv_xrmax); 499 dofs = alloca(sizeof (dof_secidx_t) * (nxr + 1)); 500 xr = 1; /* reserve dofs[0] for the provider itself */ 501 502 /* 503 * For each translator referenced by the provider (pv_xrefs), emit an 504 * exported translator section for it if one hasn't been created yet. 505 */ 506 for (i = 0; i < pvp->pv_xrmax; i++) { 507 if (BT_TEST(pvp->pv_xrefs, i) && 508 dtp->dt_xlatemode == DT_XL_DYNAMIC) { 509 dof_add_translator(ddo, 510 dt_xlator_lookup_id(dtp, i), DOF_SECT_XLEXPORT); 511 dofs[xr++] = ddo->ddo_xlexport[i]; 512 } 513 } 514 515 dt_buf_reset(dtp, &ddo->ddo_probes); 516 dt_buf_reset(dtp, &ddo->ddo_args); 517 dt_buf_reset(dtp, &ddo->ddo_offs); 518 dt_buf_reset(dtp, &ddo->ddo_enoffs); 519 dt_buf_reset(dtp, &ddo->ddo_rels); 520 521 (void) dt_idhash_iter(pvp->pv_probes, dof_add_probe, ddo); 522 523 if (dt_buf_len(&ddo->ddo_probes) == 0) 524 return (dt_set_errno(dtp, EDT_NOPROBES)); 525 526 dofpv.dofpv_probes = dof_add_lsect(ddo, NULL, DOF_SECT_PROBES, 527 sizeof (uint64_t), 0, sizeof (dof_probe_t), 528 dt_buf_len(&ddo->ddo_probes)); 529 530 dt_buf_concat(dtp, &ddo->ddo_ldata, 531 &ddo->ddo_probes, sizeof (uint64_t)); 532 533 dofpv.dofpv_prargs = dof_add_lsect(ddo, NULL, DOF_SECT_PRARGS, 534 sizeof (uint8_t), 0, sizeof (uint8_t), dt_buf_len(&ddo->ddo_args)); 535 536 dt_buf_concat(dtp, &ddo->ddo_ldata, &ddo->ddo_args, sizeof (uint8_t)); 537 538 dofpv.dofpv_proffs = dof_add_lsect(ddo, NULL, DOF_SECT_PROFFS, 539 sizeof (uint_t), 0, sizeof (uint_t), dt_buf_len(&ddo->ddo_offs)); 540 541 dt_buf_concat(dtp, &ddo->ddo_ldata, &ddo->ddo_offs, sizeof (uint_t)); 542 543 if ((sz = dt_buf_len(&ddo->ddo_enoffs)) != 0) { 544 dofpv.dofpv_prenoffs = dof_add_lsect(ddo, NULL, 545 DOF_SECT_PRENOFFS, sizeof (uint_t), 0, sizeof (uint_t), sz); 546 } else { 547 dofpv.dofpv_prenoffs = DOF_SECT_NONE; 548 } 549 550 dt_buf_concat(dtp, &ddo->ddo_ldata, &ddo->ddo_enoffs, sizeof (uint_t)); 551 552 dofpv.dofpv_strtab = ddo->ddo_strsec; 553 dofpv.dofpv_name = dof_add_string(ddo, pvp->pv_desc.dtvd_name); 554 555 dofpv.dofpv_provattr = dof_attr(&pvp->pv_desc.dtvd_attr.dtpa_provider); 556 dofpv.dofpv_modattr = dof_attr(&pvp->pv_desc.dtvd_attr.dtpa_mod); 557 dofpv.dofpv_funcattr = dof_attr(&pvp->pv_desc.dtvd_attr.dtpa_func); 558 dofpv.dofpv_nameattr = dof_attr(&pvp->pv_desc.dtvd_attr.dtpa_name); 559 dofpv.dofpv_argsattr = dof_attr(&pvp->pv_desc.dtvd_attr.dtpa_args); 560 561 dofs[0] = dof_add_lsect(ddo, &dofpv, DOF_SECT_PROVIDER, 562 sizeof (dof_secidx_t), 0, 0, sizeof (dof_provider_t)); 563 564 dofr.dofr_strtab = dofpv.dofpv_strtab; 565 dofr.dofr_tgtsec = dofpv.dofpv_probes; 566 dofr.dofr_relsec = dof_add_lsect(ddo, NULL, DOF_SECT_RELTAB, 567 sizeof (uint64_t), 0, sizeof (dof_relodesc_t), 568 dt_buf_len(&ddo->ddo_rels)); 569 570 dt_buf_concat(dtp, &ddo->ddo_ldata, &ddo->ddo_rels, sizeof (uint64_t)); 571 572 (void) dof_add_lsect(ddo, &dofr, DOF_SECT_URELHDR, 573 sizeof (dof_secidx_t), 0, 0, sizeof (dof_relohdr_t)); 574 575 if (nxr != 0 && dtp->dt_xlatemode == DT_XL_DYNAMIC) { 576 (void) dof_add_lsect(ddo, dofs, DOF_SECT_PREXPORT, 577 sizeof (dof_secidx_t), 0, sizeof (dof_secidx_t), 578 sizeof (dof_secidx_t) * (nxr + 1)); 579 } 580 581 return (0); 582 } 583 584 static int 585 dof_hdr(dtrace_hdl_t *dtp, uint8_t dofversion, dof_hdr_t *hp) 586 { 587 /* 588 * If our config values cannot fit in a uint8_t, we can't generate a 589 * DOF header since the values won't fit. This can only happen if the 590 * user forcibly compiles a program with an artificial configuration. 591 */ 592 if (dtp->dt_conf.dtc_difversion > UINT8_MAX || 593 dtp->dt_conf.dtc_difintregs > UINT8_MAX || 594 dtp->dt_conf.dtc_diftupregs > UINT8_MAX) 595 return (dt_set_errno(dtp, EOVERFLOW)); 596 597 bzero(hp, sizeof (dof_hdr_t)); 598 599 hp->dofh_ident[DOF_ID_MAG0] = DOF_MAG_MAG0; 600 hp->dofh_ident[DOF_ID_MAG1] = DOF_MAG_MAG1; 601 hp->dofh_ident[DOF_ID_MAG2] = DOF_MAG_MAG2; 602 hp->dofh_ident[DOF_ID_MAG3] = DOF_MAG_MAG3; 603 604 if (dtp->dt_conf.dtc_ctfmodel == CTF_MODEL_LP64) 605 hp->dofh_ident[DOF_ID_MODEL] = DOF_MODEL_LP64; 606 else 607 hp->dofh_ident[DOF_ID_MODEL] = DOF_MODEL_ILP32; 608 609 hp->dofh_ident[DOF_ID_ENCODING] = DOF_ENCODE_NATIVE; 610 hp->dofh_ident[DOF_ID_VERSION] = dofversion; 611 hp->dofh_ident[DOF_ID_DIFVERS] = dtp->dt_conf.dtc_difversion; 612 hp->dofh_ident[DOF_ID_DIFIREG] = dtp->dt_conf.dtc_difintregs; 613 hp->dofh_ident[DOF_ID_DIFTREG] = dtp->dt_conf.dtc_diftupregs; 614 615 hp->dofh_hdrsize = sizeof (dof_hdr_t); 616 hp->dofh_secsize = sizeof (dof_sec_t); 617 hp->dofh_secoff = sizeof (dof_hdr_t); 618 619 return (0); 620 } 621 622 void * 623 dtrace_dof_create(dtrace_hdl_t *dtp, dtrace_prog_t *pgp, uint_t flags) 624 { 625 dt_dof_t *ddo = &dtp->dt_dof; 626 627 const dtrace_ecbdesc_t *edp, *last; 628 const dtrace_probedesc_t *pdp; 629 const dtrace_actdesc_t *ap; 630 const dt_stmt_t *stp; 631 632 uint_t maxacts = 0; 633 uint_t maxfmt = 0; 634 635 dt_provider_t *pvp; 636 dt_xlator_t *dxp; 637 dof_actdesc_t *dofa; 638 dof_sec_t *sp; 639 size_t ssize, lsize; 640 dof_hdr_t h; 641 642 dt_buf_t dof; 643 char *fmt; 644 uint_t i; 645 646 if (flags & ~DTRACE_D_MASK) { 647 (void) dt_set_errno(dtp, EINVAL); 648 return (NULL); 649 } 650 651 flags |= dtp->dt_dflags; 652 653 if (dof_hdr(dtp, pgp->dp_dofversion, &h) != 0) 654 return (NULL); 655 656 if (dt_dof_reset(dtp, pgp) != 0) 657 return (NULL); 658 659 /* 660 * Iterate through the statement list computing the maximum number of 661 * actions and the maximum format string for allocating local buffers. 662 */ 663 for (last = NULL, stp = dt_list_next(&pgp->dp_stmts); 664 stp != NULL; stp = dt_list_next(stp), last = edp) { 665 666 dtrace_stmtdesc_t *sdp = stp->ds_desc; 667 dtrace_actdesc_t *ap = sdp->dtsd_action; 668 669 if (sdp->dtsd_fmtdata != NULL) { 670 i = dtrace_printf_format(dtp, 671 sdp->dtsd_fmtdata, NULL, 0); 672 maxfmt = MAX(maxfmt, i); 673 } 674 675 if ((edp = sdp->dtsd_ecbdesc) == last) 676 continue; /* same ecb as previous statement */ 677 678 for (i = 0, ap = edp->dted_action; ap; ap = ap->dtad_next) 679 i++; 680 681 maxacts = MAX(maxacts, i); 682 } 683 684 dofa = alloca(sizeof (dof_actdesc_t) * maxacts); 685 fmt = alloca(maxfmt + 1); 686 687 ddo->ddo_strsec = dof_add_lsect(ddo, NULL, DOF_SECT_STRTAB, 1, 0, 0, 0); 688 (void) dof_add_string(ddo, ""); 689 690 /* 691 * If there are references to dynamic translators in the program, add 692 * an imported translator table entry for each referenced translator. 693 */ 694 if (pgp->dp_xrefslen != 0) { 695 for (dxp = dt_list_next(&dtp->dt_xlators); 696 dxp != NULL; dxp = dt_list_next(dxp)) { 697 if (dxp->dx_id < pgp->dp_xrefslen && 698 pgp->dp_xrefs[dxp->dx_id] != NULL) 699 dof_add_translator(ddo, dxp, DOF_SECT_XLIMPORT); 700 } 701 } 702 703 /* 704 * Now iterate through the statement list, creating the DOF section 705 * headers and data for each one and adding them to our buffers. 706 */ 707 for (last = NULL, stp = dt_list_next(&pgp->dp_stmts); 708 stp != NULL; stp = dt_list_next(stp), last = edp) { 709 710 dof_secidx_t probesec = DOF_SECIDX_NONE; 711 dof_secidx_t prdsec = DOF_SECIDX_NONE; 712 dof_secidx_t actsec = DOF_SECIDX_NONE; 713 714 const dt_stmt_t *next = stp; 715 dtrace_stmtdesc_t *sdp = stp->ds_desc; 716 dof_stridx_t strndx = 0; 717 dof_probedesc_t dofp; 718 dof_ecbdesc_t dofe; 719 uint_t i; 720 721 if ((edp = stp->ds_desc->dtsd_ecbdesc) == last) 722 continue; /* same ecb as previous statement */ 723 724 pdp = &edp->dted_probe; 725 726 /* 727 * Add a DOF_SECT_PROBEDESC for the ECB's probe description, 728 * and copy the probe description strings into the string table. 729 */ 730 dofp.dofp_strtab = ddo->ddo_strsec; 731 dofp.dofp_provider = dof_add_string(ddo, pdp->dtpd_provider); 732 dofp.dofp_mod = dof_add_string(ddo, pdp->dtpd_mod); 733 dofp.dofp_func = dof_add_string(ddo, pdp->dtpd_func); 734 dofp.dofp_name = dof_add_string(ddo, pdp->dtpd_name); 735 dofp.dofp_id = pdp->dtpd_id; 736 737 probesec = dof_add_lsect(ddo, &dofp, DOF_SECT_PROBEDESC, 738 sizeof (dof_secidx_t), 0, 739 sizeof (dof_probedesc_t), sizeof (dof_probedesc_t)); 740 741 /* 742 * If there is a predicate DIFO associated with the ecbdesc, 743 * write out the DIFO sections and save the DIFO section index. 744 */ 745 if (edp->dted_pred.dtpdd_difo != NULL) 746 prdsec = dof_add_difo(ddo, edp->dted_pred.dtpdd_difo); 747 748 /* 749 * Now iterate through the action list generating DIFOs as 750 * referenced therein and adding action descriptions to 'dofa'. 751 */ 752 for (i = 0, ap = edp->dted_action; 753 ap != NULL; ap = ap->dtad_next, i++) { 754 755 if (ap->dtad_difo != NULL) { 756 dofa[i].dofa_difo = 757 dof_add_difo(ddo, ap->dtad_difo); 758 } else 759 dofa[i].dofa_difo = DOF_SECIDX_NONE; 760 761 /* 762 * If the first action in a statement has string data, 763 * add the string to the global string table. This can 764 * be due either to a printf() format string 765 * (dtsd_fmtdata) or a print() type string 766 * (dtsd_strdata). 767 */ 768 if (sdp != NULL && ap == sdp->dtsd_action) { 769 if (sdp->dtsd_fmtdata != NULL) { 770 (void) dtrace_printf_format(dtp, 771 sdp->dtsd_fmtdata, fmt, maxfmt + 1); 772 strndx = dof_add_string(ddo, fmt); 773 } else if (sdp->dtsd_strdata != NULL) { 774 strndx = dof_add_string(ddo, 775 sdp->dtsd_strdata); 776 } else { 777 strndx = 0; /* use dtad_arg instead */ 778 } 779 780 if ((next = dt_list_next(next)) != NULL) 781 sdp = next->ds_desc; 782 else 783 sdp = NULL; 784 } 785 786 if (strndx != 0) { 787 dofa[i].dofa_arg = strndx; 788 dofa[i].dofa_strtab = ddo->ddo_strsec; 789 } else { 790 dofa[i].dofa_arg = ap->dtad_arg; 791 dofa[i].dofa_strtab = DOF_SECIDX_NONE; 792 } 793 794 dofa[i].dofa_kind = ap->dtad_kind; 795 dofa[i].dofa_ntuple = ap->dtad_ntuple; 796 dofa[i].dofa_uarg = ap->dtad_uarg; 797 } 798 799 if (i > 0) { 800 actsec = dof_add_lsect(ddo, dofa, DOF_SECT_ACTDESC, 801 sizeof (uint64_t), 0, sizeof (dof_actdesc_t), 802 sizeof (dof_actdesc_t) * i); 803 } 804 805 /* 806 * Now finally, add the DOF_SECT_ECBDESC referencing all the 807 * previously created sub-sections. 808 */ 809 dofe.dofe_probes = probesec; 810 dofe.dofe_pred = prdsec; 811 dofe.dofe_actions = actsec; 812 dofe.dofe_pad = 0; 813 dofe.dofe_uarg = edp->dted_uarg; 814 815 (void) dof_add_lsect(ddo, &dofe, DOF_SECT_ECBDESC, 816 sizeof (uint64_t), 0, 0, sizeof (dof_ecbdesc_t)); 817 } 818 819 /* 820 * If any providers are user-defined, output DOF sections corresponding 821 * to the providers and the probes and arguments that they define. 822 */ 823 if (flags & DTRACE_D_PROBES) { 824 for (pvp = dt_list_next(&dtp->dt_provlist); 825 pvp != NULL; pvp = dt_list_next(pvp)) { 826 if (dof_add_provider(ddo, pvp) != 0) 827 return (NULL); 828 } 829 } 830 831 /* 832 * If we're not stripping unloadable sections, generate compiler 833 * comments and any other unloadable miscellany. 834 */ 835 if (!(flags & DTRACE_D_STRIP)) { 836 (void) dof_add_usect(ddo, _dtrace_version, DOF_SECT_COMMENTS, 837 sizeof (char), 0, 0, strlen(_dtrace_version) + 1); 838 (void) dof_add_usect(ddo, &dtp->dt_uts, DOF_SECT_UTSNAME, 839 sizeof (char), 0, 0, sizeof (struct utsname)); 840 } 841 842 /* 843 * Compute and fill in the appropriate values for the dof_hdr_t's 844 * dofh_secnum, dofh_loadsz, and dofh_filez values. 845 */ 846 h.dofh_secnum = ddo->ddo_nsecs; 847 ssize = sizeof (h) + dt_buf_len(&ddo->ddo_secs); 848 849 h.dofh_loadsz = ssize + 850 dt_buf_len(&ddo->ddo_ldata) + 851 dt_buf_len(&ddo->ddo_strs); 852 853 if (dt_buf_len(&ddo->ddo_udata) != 0) { 854 lsize = roundup(h.dofh_loadsz, sizeof (uint64_t)); 855 h.dofh_filesz = lsize + dt_buf_len(&ddo->ddo_udata); 856 } else { 857 lsize = h.dofh_loadsz; 858 h.dofh_filesz = lsize; 859 } 860 861 /* 862 * Set the global DOF_SECT_STRTAB's offset to be after the header, 863 * section headers, and other loadable data. Since we're going to 864 * iterate over the buffer data directly, we must check for errors. 865 */ 866 if ((i = dt_buf_error(&ddo->ddo_secs)) != 0) { 867 (void) dt_set_errno(dtp, i); 868 return (NULL); 869 } 870 871 sp = dt_buf_ptr(&ddo->ddo_secs); 872 assert(sp[ddo->ddo_strsec].dofs_type == DOF_SECT_STRTAB); 873 assert(ssize == sizeof (h) + sizeof (dof_sec_t) * ddo->ddo_nsecs); 874 875 sp[ddo->ddo_strsec].dofs_offset = ssize + dt_buf_len(&ddo->ddo_ldata); 876 sp[ddo->ddo_strsec].dofs_size = dt_buf_len(&ddo->ddo_strs); 877 878 /* 879 * Now relocate all the other section headers by adding the appropriate 880 * delta to their respective dofs_offset values. 881 */ 882 for (i = 0; i < ddo->ddo_nsecs; i++, sp++) { 883 if (i == ddo->ddo_strsec) 884 continue; /* already relocated above */ 885 886 if (sp->dofs_flags & DOF_SECF_LOAD) 887 sp->dofs_offset += ssize; 888 else 889 sp->dofs_offset += lsize; 890 } 891 892 /* 893 * Finally, assemble the complete in-memory DOF buffer by writing the 894 * header and then concatenating all our buffers. dt_buf_concat() will 895 * propagate any errors and cause dt_buf_claim() to return NULL. 896 */ 897 dt_buf_create(dtp, &dof, "dof", h.dofh_filesz); 898 899 dt_buf_write(dtp, &dof, &h, sizeof (h), sizeof (uint64_t)); 900 dt_buf_concat(dtp, &dof, &ddo->ddo_secs, sizeof (uint64_t)); 901 dt_buf_concat(dtp, &dof, &ddo->ddo_ldata, sizeof (uint64_t)); 902 dt_buf_concat(dtp, &dof, &ddo->ddo_strs, sizeof (char)); 903 dt_buf_concat(dtp, &dof, &ddo->ddo_udata, sizeof (uint64_t)); 904 905 return (dt_buf_claim(dtp, &dof)); 906 } 907 908 void 909 dtrace_dof_destroy(dtrace_hdl_t *dtp, void *dof) 910 { 911 dt_free(dtp, dof); 912 } 913 914 void * 915 dtrace_getopt_dof(dtrace_hdl_t *dtp) 916 { 917 dof_hdr_t *dof; 918 dof_sec_t *sec; 919 dof_optdesc_t *dofo; 920 int i, nopts = 0, len = sizeof (dof_hdr_t) + 921 roundup(sizeof (dof_sec_t), sizeof (uint64_t)); 922 923 for (i = 0; i < DTRACEOPT_MAX; i++) { 924 if (dtp->dt_options[i] != DTRACEOPT_UNSET) 925 nopts++; 926 } 927 928 len += sizeof (dof_optdesc_t) * nopts; 929 930 if ((dof = dt_zalloc(dtp, len)) == NULL || 931 dof_hdr(dtp, DOF_VERSION, dof) != 0) { 932 dt_free(dtp, dof); 933 return (NULL); 934 } 935 936 dof->dofh_secnum = 1; /* only DOF_SECT_OPTDESC */ 937 dof->dofh_loadsz = len; 938 dof->dofh_filesz = len; 939 940 /* 941 * Fill in the option section header... 942 */ 943 sec = (dof_sec_t *)((uintptr_t)dof + sizeof (dof_hdr_t)); 944 sec->dofs_type = DOF_SECT_OPTDESC; 945 sec->dofs_align = sizeof (uint64_t); 946 sec->dofs_flags = DOF_SECF_LOAD; 947 sec->dofs_entsize = sizeof (dof_optdesc_t); 948 949 dofo = (dof_optdesc_t *)((uintptr_t)sec + 950 roundup(sizeof (dof_sec_t), sizeof (uint64_t))); 951 952 sec->dofs_offset = (uintptr_t)dofo - (uintptr_t)dof; 953 sec->dofs_size = sizeof (dof_optdesc_t) * nopts; 954 955 for (i = 0; i < DTRACEOPT_MAX; i++) { 956 if (dtp->dt_options[i] == DTRACEOPT_UNSET) 957 continue; 958 959 dofo->dofo_option = i; 960 dofo->dofo_strtab = DOF_SECIDX_NONE; 961 dofo->dofo_value = dtp->dt_options[i]; 962 dofo++; 963 } 964 965 return (dof); 966 } 967 968 void * 969 dtrace_geterr_dof(dtrace_hdl_t *dtp) 970 { 971 if (dtp->dt_errprog != NULL) 972 return (dtrace_dof_create(dtp, dtp->dt_errprog, 0)); 973 974 (void) dt_set_errno(dtp, EDT_BADERROR); 975 return (NULL); 976 } 977
Indexes created Tue Feb 24 08:35:24 UTC 2026