1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* 23*0Sstevel@tonic-gate * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 24*0Sstevel@tonic-gate * Use is subject to license terms. 25*0Sstevel@tonic-gate */ 26*0Sstevel@tonic-gate 27*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 28*0Sstevel@tonic-gate 29*0Sstevel@tonic-gate #include <sys/modctl.h> 30*0Sstevel@tonic-gate #include <sys/sunddi.h> 31*0Sstevel@tonic-gate #include <sys/dtrace.h> 32*0Sstevel@tonic-gate #include <sys/kobj.h> 33*0Sstevel@tonic-gate #include <sys/stat.h> 34*0Sstevel@tonic-gate #include <sys/conf.h> 35*0Sstevel@tonic-gate #include <vm/seg_kmem.h> 36*0Sstevel@tonic-gate #include <sys/stack.h> 37*0Sstevel@tonic-gate #include <sys/sdt_impl.h> 38*0Sstevel@tonic-gate 39*0Sstevel@tonic-gate #define SDT_PATCHVAL 0xf0 40*0Sstevel@tonic-gate #define SDT_ADDR2NDX(addr) ((((uintptr_t)(addr)) >> 4) & sdt_probetab_mask) 41*0Sstevel@tonic-gate #define SDT_PROBETAB_SIZE 0x1000 /* 4k entries -- 16K total */ 42*0Sstevel@tonic-gate 43*0Sstevel@tonic-gate static dev_info_t *sdt_devi; 44*0Sstevel@tonic-gate static int sdt_verbose = 0; 45*0Sstevel@tonic-gate static sdt_probe_t **sdt_probetab; 46*0Sstevel@tonic-gate static int sdt_probetab_size; 47*0Sstevel@tonic-gate static int sdt_probetab_mask; 48*0Sstevel@tonic-gate 49*0Sstevel@tonic-gate /*ARGSUSED*/ 50*0Sstevel@tonic-gate static int 51*0Sstevel@tonic-gate sdt_invop(uintptr_t addr, uintptr_t *stack, uintptr_t eax) 52*0Sstevel@tonic-gate { 53*0Sstevel@tonic-gate uintptr_t stack0, stack1, stack2, stack3, stack4; 54*0Sstevel@tonic-gate int i = 0; 55*0Sstevel@tonic-gate sdt_probe_t *sdt = sdt_probetab[SDT_ADDR2NDX(addr)]; 56*0Sstevel@tonic-gate 57*0Sstevel@tonic-gate #ifdef __amd64 58*0Sstevel@tonic-gate /* 59*0Sstevel@tonic-gate * On amd64, stack[0] contains the dereferenced stack pointer, 60*0Sstevel@tonic-gate * stack[1] contains savfp, stack[2] contains savpc. We want 61*0Sstevel@tonic-gate * to step over these entries. 62*0Sstevel@tonic-gate */ 63*0Sstevel@tonic-gate i += 3; 64*0Sstevel@tonic-gate #endif 65*0Sstevel@tonic-gate 66*0Sstevel@tonic-gate for (; sdt != NULL; sdt = sdt->sdp_hashnext) { 67*0Sstevel@tonic-gate if ((uintptr_t)sdt->sdp_patchpoint == addr) { 68*0Sstevel@tonic-gate /* 69*0Sstevel@tonic-gate * When accessing the arguments on the stack, we must 70*0Sstevel@tonic-gate * protect against accessing beyond the stack. We can 71*0Sstevel@tonic-gate * safely set NOFAULT here -- we know that interrupts 72*0Sstevel@tonic-gate * are already disabled. 73*0Sstevel@tonic-gate */ 74*0Sstevel@tonic-gate DTRACE_CPUFLAG_SET(CPU_DTRACE_NOFAULT); 75*0Sstevel@tonic-gate stack0 = stack[i++]; 76*0Sstevel@tonic-gate stack1 = stack[i++]; 77*0Sstevel@tonic-gate stack2 = stack[i++]; 78*0Sstevel@tonic-gate stack3 = stack[i++]; 79*0Sstevel@tonic-gate stack4 = stack[i++]; 80*0Sstevel@tonic-gate DTRACE_CPUFLAG_CLEAR(CPU_DTRACE_NOFAULT | 81*0Sstevel@tonic-gate CPU_DTRACE_BADADDR); 82*0Sstevel@tonic-gate 83*0Sstevel@tonic-gate dtrace_probe(sdt->sdp_id, stack0, stack1, 84*0Sstevel@tonic-gate stack2, stack3, stack4); 85*0Sstevel@tonic-gate 86*0Sstevel@tonic-gate return (DTRACE_INVOP_NOP); 87*0Sstevel@tonic-gate } 88*0Sstevel@tonic-gate } 89*0Sstevel@tonic-gate 90*0Sstevel@tonic-gate return (0); 91*0Sstevel@tonic-gate } 92*0Sstevel@tonic-gate 93*0Sstevel@tonic-gate /*ARGSUSED*/ 94*0Sstevel@tonic-gate static void 95*0Sstevel@tonic-gate sdt_provide_module(void *arg, struct modctl *ctl) 96*0Sstevel@tonic-gate { 97*0Sstevel@tonic-gate struct module *mp = ctl->mod_mp; 98*0Sstevel@tonic-gate char *modname = ctl->mod_modname; 99*0Sstevel@tonic-gate sdt_probedesc_t *sdpd; 100*0Sstevel@tonic-gate sdt_probe_t *sdp, *old; 101*0Sstevel@tonic-gate sdt_provider_t *prov; 102*0Sstevel@tonic-gate int len; 103*0Sstevel@tonic-gate 104*0Sstevel@tonic-gate /* 105*0Sstevel@tonic-gate * One for all, and all for one: if we haven't yet registered all of 106*0Sstevel@tonic-gate * our providers, we'll refuse to provide anything. 107*0Sstevel@tonic-gate */ 108*0Sstevel@tonic-gate for (prov = sdt_providers; prov->sdtp_name != NULL; prov++) { 109*0Sstevel@tonic-gate if (prov->sdtp_id == DTRACE_PROVNONE) 110*0Sstevel@tonic-gate return; 111*0Sstevel@tonic-gate } 112*0Sstevel@tonic-gate 113*0Sstevel@tonic-gate if (mp->sdt_nprobes != 0 || (sdpd = mp->sdt_probes) == NULL) 114*0Sstevel@tonic-gate return; 115*0Sstevel@tonic-gate 116*0Sstevel@tonic-gate for (sdpd = mp->sdt_probes; sdpd != NULL; sdpd = sdpd->sdpd_next) { 117*0Sstevel@tonic-gate char *name = sdpd->sdpd_name, *func, *nname; 118*0Sstevel@tonic-gate int i, j; 119*0Sstevel@tonic-gate sdt_provider_t *prov; 120*0Sstevel@tonic-gate ulong_t offs; 121*0Sstevel@tonic-gate dtrace_id_t id; 122*0Sstevel@tonic-gate 123*0Sstevel@tonic-gate for (prov = sdt_providers; prov->sdtp_prefix != NULL; prov++) { 124*0Sstevel@tonic-gate char *prefix = prov->sdtp_prefix; 125*0Sstevel@tonic-gate 126*0Sstevel@tonic-gate if (strncmp(name, prefix, strlen(prefix)) == 0) { 127*0Sstevel@tonic-gate name += strlen(prefix); 128*0Sstevel@tonic-gate break; 129*0Sstevel@tonic-gate } 130*0Sstevel@tonic-gate } 131*0Sstevel@tonic-gate 132*0Sstevel@tonic-gate nname = kmem_alloc(len = strlen(name) + 1, KM_SLEEP); 133*0Sstevel@tonic-gate 134*0Sstevel@tonic-gate for (i = 0, j = 0; name[j] != '\0'; i++) { 135*0Sstevel@tonic-gate if (name[j] == '_' && name[j + 1] == '_') { 136*0Sstevel@tonic-gate nname[i] = '-'; 137*0Sstevel@tonic-gate j += 2; 138*0Sstevel@tonic-gate } else { 139*0Sstevel@tonic-gate nname[i] = name[j++]; 140*0Sstevel@tonic-gate } 141*0Sstevel@tonic-gate } 142*0Sstevel@tonic-gate 143*0Sstevel@tonic-gate nname[i] = '\0'; 144*0Sstevel@tonic-gate 145*0Sstevel@tonic-gate sdp = kmem_zalloc(sizeof (sdt_probe_t), KM_SLEEP); 146*0Sstevel@tonic-gate sdp->sdp_loadcnt = ctl->mod_loadcnt; 147*0Sstevel@tonic-gate sdp->sdp_ctl = ctl; 148*0Sstevel@tonic-gate sdp->sdp_name = nname; 149*0Sstevel@tonic-gate sdp->sdp_namelen = len; 150*0Sstevel@tonic-gate sdp->sdp_provider = prov; 151*0Sstevel@tonic-gate 152*0Sstevel@tonic-gate func = kobj_searchsym(mp, sdpd->sdpd_offset, &offs); 153*0Sstevel@tonic-gate 154*0Sstevel@tonic-gate if (func == NULL) 155*0Sstevel@tonic-gate func = "<unknown>"; 156*0Sstevel@tonic-gate 157*0Sstevel@tonic-gate /* 158*0Sstevel@tonic-gate * We have our provider. Now create the probe. 159*0Sstevel@tonic-gate */ 160*0Sstevel@tonic-gate if ((id = dtrace_probe_lookup(prov->sdtp_id, modname, 161*0Sstevel@tonic-gate func, nname)) != DTRACE_IDNONE) { 162*0Sstevel@tonic-gate old = dtrace_probe_arg(prov->sdtp_id, id); 163*0Sstevel@tonic-gate ASSERT(old != NULL); 164*0Sstevel@tonic-gate 165*0Sstevel@tonic-gate sdp->sdp_next = old->sdp_next; 166*0Sstevel@tonic-gate sdp->sdp_id = id; 167*0Sstevel@tonic-gate old->sdp_next = sdp; 168*0Sstevel@tonic-gate } else { 169*0Sstevel@tonic-gate sdp->sdp_id = dtrace_probe_create(prov->sdtp_id, 170*0Sstevel@tonic-gate modname, func, nname, 3, sdp); 171*0Sstevel@tonic-gate 172*0Sstevel@tonic-gate mp->sdt_nprobes++; 173*0Sstevel@tonic-gate } 174*0Sstevel@tonic-gate 175*0Sstevel@tonic-gate sdp->sdp_hashnext = 176*0Sstevel@tonic-gate sdt_probetab[SDT_ADDR2NDX(sdpd->sdpd_offset)]; 177*0Sstevel@tonic-gate sdt_probetab[SDT_ADDR2NDX(sdpd->sdpd_offset)] = sdp; 178*0Sstevel@tonic-gate 179*0Sstevel@tonic-gate sdp->sdp_patchval = SDT_PATCHVAL; 180*0Sstevel@tonic-gate sdp->sdp_patchpoint = (uint8_t *)sdpd->sdpd_offset; 181*0Sstevel@tonic-gate sdp->sdp_savedval = *sdp->sdp_patchpoint; 182*0Sstevel@tonic-gate } 183*0Sstevel@tonic-gate } 184*0Sstevel@tonic-gate 185*0Sstevel@tonic-gate /*ARGSUSED*/ 186*0Sstevel@tonic-gate static void 187*0Sstevel@tonic-gate sdt_destroy(void *arg, dtrace_id_t id, void *parg) 188*0Sstevel@tonic-gate { 189*0Sstevel@tonic-gate sdt_probe_t *sdp = parg, *old, *last, *hash; 190*0Sstevel@tonic-gate struct modctl *ctl = sdp->sdp_ctl; 191*0Sstevel@tonic-gate int ndx; 192*0Sstevel@tonic-gate 193*0Sstevel@tonic-gate if (ctl != NULL && ctl->mod_loadcnt == sdp->sdp_loadcnt) { 194*0Sstevel@tonic-gate if ((ctl->mod_loadcnt == sdp->sdp_loadcnt && 195*0Sstevel@tonic-gate ctl->mod_loaded)) { 196*0Sstevel@tonic-gate ((struct module *)(ctl->mod_mp))->sdt_nprobes--; 197*0Sstevel@tonic-gate } 198*0Sstevel@tonic-gate } 199*0Sstevel@tonic-gate 200*0Sstevel@tonic-gate while (sdp != NULL) { 201*0Sstevel@tonic-gate old = sdp; 202*0Sstevel@tonic-gate 203*0Sstevel@tonic-gate /* 204*0Sstevel@tonic-gate * Now we need to remove this probe from the sdt_probetab. 205*0Sstevel@tonic-gate */ 206*0Sstevel@tonic-gate ndx = SDT_ADDR2NDX(sdp->sdp_patchpoint); 207*0Sstevel@tonic-gate last = NULL; 208*0Sstevel@tonic-gate hash = sdt_probetab[ndx]; 209*0Sstevel@tonic-gate 210*0Sstevel@tonic-gate while (hash != sdp) { 211*0Sstevel@tonic-gate ASSERT(hash != NULL); 212*0Sstevel@tonic-gate last = hash; 213*0Sstevel@tonic-gate hash = hash->sdp_hashnext; 214*0Sstevel@tonic-gate } 215*0Sstevel@tonic-gate 216*0Sstevel@tonic-gate if (last != NULL) { 217*0Sstevel@tonic-gate last->sdp_hashnext = sdp->sdp_hashnext; 218*0Sstevel@tonic-gate } else { 219*0Sstevel@tonic-gate sdt_probetab[ndx] = sdp->sdp_hashnext; 220*0Sstevel@tonic-gate } 221*0Sstevel@tonic-gate 222*0Sstevel@tonic-gate kmem_free(sdp->sdp_name, sdp->sdp_namelen); 223*0Sstevel@tonic-gate sdp = sdp->sdp_next; 224*0Sstevel@tonic-gate kmem_free(old, sizeof (sdt_probe_t)); 225*0Sstevel@tonic-gate } 226*0Sstevel@tonic-gate } 227*0Sstevel@tonic-gate 228*0Sstevel@tonic-gate /*ARGSUSED*/ 229*0Sstevel@tonic-gate static void 230*0Sstevel@tonic-gate sdt_enable(void *arg, dtrace_id_t id, void *parg) 231*0Sstevel@tonic-gate { 232*0Sstevel@tonic-gate sdt_probe_t *sdp = parg; 233*0Sstevel@tonic-gate struct modctl *ctl = sdp->sdp_ctl; 234*0Sstevel@tonic-gate 235*0Sstevel@tonic-gate ctl->mod_nenabled++; 236*0Sstevel@tonic-gate 237*0Sstevel@tonic-gate /* 238*0Sstevel@tonic-gate * If this module has disappeared since we discovered its probes, 239*0Sstevel@tonic-gate * refuse to enable it. 240*0Sstevel@tonic-gate */ 241*0Sstevel@tonic-gate if (!ctl->mod_loaded) { 242*0Sstevel@tonic-gate if (sdt_verbose) { 243*0Sstevel@tonic-gate cmn_err(CE_NOTE, "sdt is failing for probe %s " 244*0Sstevel@tonic-gate "(module %s unloaded)", 245*0Sstevel@tonic-gate sdp->sdp_name, ctl->mod_modname); 246*0Sstevel@tonic-gate } 247*0Sstevel@tonic-gate goto err; 248*0Sstevel@tonic-gate } 249*0Sstevel@tonic-gate 250*0Sstevel@tonic-gate /* 251*0Sstevel@tonic-gate * Now check that our modctl has the expected load count. If it 252*0Sstevel@tonic-gate * doesn't, this module must have been unloaded and reloaded -- and 253*0Sstevel@tonic-gate * we're not going to touch it. 254*0Sstevel@tonic-gate */ 255*0Sstevel@tonic-gate if (ctl->mod_loadcnt != sdp->sdp_loadcnt) { 256*0Sstevel@tonic-gate if (sdt_verbose) { 257*0Sstevel@tonic-gate cmn_err(CE_NOTE, "sdt is failing for probe %s " 258*0Sstevel@tonic-gate "(module %s reloaded)", 259*0Sstevel@tonic-gate sdp->sdp_name, ctl->mod_modname); 260*0Sstevel@tonic-gate } 261*0Sstevel@tonic-gate goto err; 262*0Sstevel@tonic-gate } 263*0Sstevel@tonic-gate 264*0Sstevel@tonic-gate while (sdp != NULL) { 265*0Sstevel@tonic-gate *sdp->sdp_patchpoint = sdp->sdp_patchval; 266*0Sstevel@tonic-gate sdp = sdp->sdp_next; 267*0Sstevel@tonic-gate } 268*0Sstevel@tonic-gate err: 269*0Sstevel@tonic-gate ; 270*0Sstevel@tonic-gate } 271*0Sstevel@tonic-gate 272*0Sstevel@tonic-gate /*ARGSUSED*/ 273*0Sstevel@tonic-gate static void 274*0Sstevel@tonic-gate sdt_disable(void *arg, dtrace_id_t id, void *parg) 275*0Sstevel@tonic-gate { 276*0Sstevel@tonic-gate sdt_probe_t *sdp = parg; 277*0Sstevel@tonic-gate struct modctl *ctl = sdp->sdp_ctl; 278*0Sstevel@tonic-gate 279*0Sstevel@tonic-gate ctl->mod_nenabled--; 280*0Sstevel@tonic-gate 281*0Sstevel@tonic-gate if (!ctl->mod_loaded || ctl->mod_loadcnt != sdp->sdp_loadcnt) 282*0Sstevel@tonic-gate goto err; 283*0Sstevel@tonic-gate 284*0Sstevel@tonic-gate while (sdp != NULL) { 285*0Sstevel@tonic-gate *sdp->sdp_patchpoint = sdp->sdp_savedval; 286*0Sstevel@tonic-gate sdp = sdp->sdp_next; 287*0Sstevel@tonic-gate } 288*0Sstevel@tonic-gate 289*0Sstevel@tonic-gate err: 290*0Sstevel@tonic-gate ; 291*0Sstevel@tonic-gate } 292*0Sstevel@tonic-gate 293*0Sstevel@tonic-gate static dtrace_pops_t sdt_pops = { 294*0Sstevel@tonic-gate NULL, 295*0Sstevel@tonic-gate sdt_provide_module, 296*0Sstevel@tonic-gate sdt_enable, 297*0Sstevel@tonic-gate sdt_disable, 298*0Sstevel@tonic-gate NULL, 299*0Sstevel@tonic-gate NULL, 300*0Sstevel@tonic-gate sdt_getargdesc, 301*0Sstevel@tonic-gate NULL, 302*0Sstevel@tonic-gate NULL, 303*0Sstevel@tonic-gate sdt_destroy 304*0Sstevel@tonic-gate }; 305*0Sstevel@tonic-gate 306*0Sstevel@tonic-gate /*ARGSUSED*/ 307*0Sstevel@tonic-gate static int 308*0Sstevel@tonic-gate sdt_attach(dev_info_t *devi, ddi_attach_cmd_t cmd) 309*0Sstevel@tonic-gate { 310*0Sstevel@tonic-gate sdt_provider_t *prov; 311*0Sstevel@tonic-gate 312*0Sstevel@tonic-gate if (ddi_create_minor_node(devi, "sdt", S_IFCHR, 313*0Sstevel@tonic-gate 0, DDI_PSEUDO, NULL) == DDI_FAILURE) { 314*0Sstevel@tonic-gate cmn_err(CE_NOTE, "/dev/sdt couldn't create minor node"); 315*0Sstevel@tonic-gate ddi_remove_minor_node(devi, NULL); 316*0Sstevel@tonic-gate return (DDI_FAILURE); 317*0Sstevel@tonic-gate } 318*0Sstevel@tonic-gate 319*0Sstevel@tonic-gate ddi_report_dev(devi); 320*0Sstevel@tonic-gate sdt_devi = devi; 321*0Sstevel@tonic-gate 322*0Sstevel@tonic-gate if (sdt_probetab_size == 0) 323*0Sstevel@tonic-gate sdt_probetab_size = SDT_PROBETAB_SIZE; 324*0Sstevel@tonic-gate 325*0Sstevel@tonic-gate sdt_probetab_mask = sdt_probetab_size - 1; 326*0Sstevel@tonic-gate sdt_probetab = 327*0Sstevel@tonic-gate kmem_zalloc(sdt_probetab_size * sizeof (sdt_probe_t *), KM_SLEEP); 328*0Sstevel@tonic-gate dtrace_invop_add(sdt_invop); 329*0Sstevel@tonic-gate 330*0Sstevel@tonic-gate for (prov = sdt_providers; prov->sdtp_name != NULL; prov++) { 331*0Sstevel@tonic-gate if (dtrace_register(prov->sdtp_name, prov->sdtp_attr, 332*0Sstevel@tonic-gate DTRACE_PRIV_KERNEL, 0, 333*0Sstevel@tonic-gate &sdt_pops, prov, &prov->sdtp_id) != 0) { 334*0Sstevel@tonic-gate cmn_err(CE_WARN, "failed to register sdt provider %s", 335*0Sstevel@tonic-gate prov->sdtp_name); 336*0Sstevel@tonic-gate } 337*0Sstevel@tonic-gate } 338*0Sstevel@tonic-gate 339*0Sstevel@tonic-gate return (DDI_SUCCESS); 340*0Sstevel@tonic-gate } 341*0Sstevel@tonic-gate 342*0Sstevel@tonic-gate /*ARGSUSED*/ 343*0Sstevel@tonic-gate static int 344*0Sstevel@tonic-gate sdt_detach(dev_info_t *dip, ddi_detach_cmd_t cmd) 345*0Sstevel@tonic-gate { 346*0Sstevel@tonic-gate sdt_provider_t *prov; 347*0Sstevel@tonic-gate 348*0Sstevel@tonic-gate switch (cmd) { 349*0Sstevel@tonic-gate case DDI_DETACH: 350*0Sstevel@tonic-gate break; 351*0Sstevel@tonic-gate 352*0Sstevel@tonic-gate case DDI_SUSPEND: 353*0Sstevel@tonic-gate return (DDI_SUCCESS); 354*0Sstevel@tonic-gate 355*0Sstevel@tonic-gate default: 356*0Sstevel@tonic-gate return (DDI_FAILURE); 357*0Sstevel@tonic-gate } 358*0Sstevel@tonic-gate 359*0Sstevel@tonic-gate for (prov = sdt_providers; prov->sdtp_name != NULL; prov++) { 360*0Sstevel@tonic-gate if (prov->sdtp_id != DTRACE_PROVNONE) { 361*0Sstevel@tonic-gate if (dtrace_unregister(prov->sdtp_id) != 0) 362*0Sstevel@tonic-gate return (DDI_FAILURE); 363*0Sstevel@tonic-gate 364*0Sstevel@tonic-gate prov->sdtp_id = DTRACE_PROVNONE; 365*0Sstevel@tonic-gate } 366*0Sstevel@tonic-gate } 367*0Sstevel@tonic-gate 368*0Sstevel@tonic-gate dtrace_invop_remove(sdt_invop); 369*0Sstevel@tonic-gate kmem_free(sdt_probetab, sdt_probetab_size * sizeof (sdt_probe_t *)); 370*0Sstevel@tonic-gate 371*0Sstevel@tonic-gate return (DDI_SUCCESS); 372*0Sstevel@tonic-gate } 373*0Sstevel@tonic-gate 374*0Sstevel@tonic-gate /*ARGSUSED*/ 375*0Sstevel@tonic-gate static int 376*0Sstevel@tonic-gate sdt_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result) 377*0Sstevel@tonic-gate { 378*0Sstevel@tonic-gate int error; 379*0Sstevel@tonic-gate 380*0Sstevel@tonic-gate switch (infocmd) { 381*0Sstevel@tonic-gate case DDI_INFO_DEVT2DEVINFO: 382*0Sstevel@tonic-gate *result = (void *)sdt_devi; 383*0Sstevel@tonic-gate error = DDI_SUCCESS; 384*0Sstevel@tonic-gate break; 385*0Sstevel@tonic-gate case DDI_INFO_DEVT2INSTANCE: 386*0Sstevel@tonic-gate *result = (void *)0; 387*0Sstevel@tonic-gate error = DDI_SUCCESS; 388*0Sstevel@tonic-gate break; 389*0Sstevel@tonic-gate default: 390*0Sstevel@tonic-gate error = DDI_FAILURE; 391*0Sstevel@tonic-gate } 392*0Sstevel@tonic-gate return (error); 393*0Sstevel@tonic-gate } 394*0Sstevel@tonic-gate 395*0Sstevel@tonic-gate /*ARGSUSED*/ 396*0Sstevel@tonic-gate static int 397*0Sstevel@tonic-gate sdt_open(dev_t *devp, int flag, int otyp, cred_t *cred_p) 398*0Sstevel@tonic-gate { 399*0Sstevel@tonic-gate return (0); 400*0Sstevel@tonic-gate } 401*0Sstevel@tonic-gate 402*0Sstevel@tonic-gate static struct cb_ops sdt_cb_ops = { 403*0Sstevel@tonic-gate sdt_open, /* open */ 404*0Sstevel@tonic-gate nodev, /* close */ 405*0Sstevel@tonic-gate nulldev, /* strategy */ 406*0Sstevel@tonic-gate nulldev, /* print */ 407*0Sstevel@tonic-gate nodev, /* dump */ 408*0Sstevel@tonic-gate nodev, /* read */ 409*0Sstevel@tonic-gate nodev, /* write */ 410*0Sstevel@tonic-gate nodev, /* ioctl */ 411*0Sstevel@tonic-gate nodev, /* devmap */ 412*0Sstevel@tonic-gate nodev, /* mmap */ 413*0Sstevel@tonic-gate nodev, /* segmap */ 414*0Sstevel@tonic-gate nochpoll, /* poll */ 415*0Sstevel@tonic-gate ddi_prop_op, /* cb_prop_op */ 416*0Sstevel@tonic-gate 0, /* streamtab */ 417*0Sstevel@tonic-gate D_NEW | D_MP /* Driver compatibility flag */ 418*0Sstevel@tonic-gate }; 419*0Sstevel@tonic-gate 420*0Sstevel@tonic-gate static struct dev_ops sdt_ops = { 421*0Sstevel@tonic-gate DEVO_REV, /* devo_rev, */ 422*0Sstevel@tonic-gate 0, /* refcnt */ 423*0Sstevel@tonic-gate sdt_info, /* get_dev_info */ 424*0Sstevel@tonic-gate nulldev, /* identify */ 425*0Sstevel@tonic-gate nulldev, /* probe */ 426*0Sstevel@tonic-gate sdt_attach, /* attach */ 427*0Sstevel@tonic-gate sdt_detach, /* detach */ 428*0Sstevel@tonic-gate nodev, /* reset */ 429*0Sstevel@tonic-gate &sdt_cb_ops, /* driver operations */ 430*0Sstevel@tonic-gate NULL, /* bus operations */ 431*0Sstevel@tonic-gate nodev /* dev power */ 432*0Sstevel@tonic-gate }; 433*0Sstevel@tonic-gate 434*0Sstevel@tonic-gate /* 435*0Sstevel@tonic-gate * Module linkage information for the kernel. 436*0Sstevel@tonic-gate */ 437*0Sstevel@tonic-gate static struct modldrv modldrv = { 438*0Sstevel@tonic-gate &mod_driverops, /* module type (this is a pseudo driver) */ 439*0Sstevel@tonic-gate "Statically Defined Tracing", /* name of module */ 440*0Sstevel@tonic-gate &sdt_ops, /* driver ops */ 441*0Sstevel@tonic-gate }; 442*0Sstevel@tonic-gate 443*0Sstevel@tonic-gate static struct modlinkage modlinkage = { 444*0Sstevel@tonic-gate MODREV_1, 445*0Sstevel@tonic-gate (void *)&modldrv, 446*0Sstevel@tonic-gate NULL 447*0Sstevel@tonic-gate }; 448*0Sstevel@tonic-gate 449*0Sstevel@tonic-gate int 450*0Sstevel@tonic-gate _init(void) 451*0Sstevel@tonic-gate { 452*0Sstevel@tonic-gate return (mod_install(&modlinkage)); 453*0Sstevel@tonic-gate } 454*0Sstevel@tonic-gate 455*0Sstevel@tonic-gate int 456*0Sstevel@tonic-gate _info(struct modinfo *modinfop) 457*0Sstevel@tonic-gate { 458*0Sstevel@tonic-gate return (mod_info(&modlinkage, modinfop)); 459*0Sstevel@tonic-gate } 460*0Sstevel@tonic-gate 461*0Sstevel@tonic-gate int 462*0Sstevel@tonic-gate _fini(void) 463*0Sstevel@tonic-gate { 464*0Sstevel@tonic-gate return (mod_remove(&modlinkage)); 465*0Sstevel@tonic-gate } 466