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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 * Copyright 2014 Howard Su 26 * Copyright 2015 George V. Neville-Neil 27 * Copyright 2015 Ruslan Bukin <br@bsdpad.com> 28 */ 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 #include <stdlib.h> 33 #include <assert.h> 34 #include <errno.h> 35 #include <string.h> 36 #include <libgen.h> 37 38 #include <dt_impl.h> 39 #include <dt_pid.h> 40 41 #if !defined(sun) 42 #include <libproc_compat.h> 43 #endif 44 45 /*ARGSUSED*/ 46 int 47 dt_pid_create_entry_probe(struct ps_prochandle *P, dtrace_hdl_t *dtp, 48 fasttrap_probe_spec_t *ftp, const GElf_Sym *symp) 49 { 50 51 ftp->ftps_type = DTFTP_ENTRY; 52 ftp->ftps_pc = (uintptr_t)symp->st_value; 53 ftp->ftps_size = (size_t)symp->st_size; 54 ftp->ftps_noffs = 1; 55 ftp->ftps_offs[0] = 0; 56 57 if (ioctl(dtp->dt_ftfd, FASTTRAPIOC_MAKEPROBE, ftp) != 0) { 58 dt_dprintf("fasttrap probe creation ioctl failed: %s\n", 59 strerror(errno)); 60 return (dt_set_errno(dtp, errno)); 61 } 62 63 return (1); 64 } 65 66 int 67 dt_pid_create_return_probe(struct ps_prochandle *P, dtrace_hdl_t *dtp, 68 fasttrap_probe_spec_t *ftp, const GElf_Sym *symp, uint64_t *stret) 69 { 70 71 dt_dprintf("%s: unimplemented\n", __func__); 72 73 return (DT_PROC_ERR); 74 } 75 76 /*ARGSUSED*/ 77 int 78 dt_pid_create_offset_probe(struct ps_prochandle *P, dtrace_hdl_t *dtp, 79 fasttrap_probe_spec_t *ftp, const GElf_Sym *symp, ulong_t off) 80 { 81 82 if (!ALIGNED_POINTER(off, 4)) 83 return (DT_PROC_ALIGN); 84 85 ftp->ftps_type = DTFTP_OFFSETS; 86 ftp->ftps_pc = (uintptr_t)symp->st_value; 87 ftp->ftps_size = (size_t)symp->st_size; 88 ftp->ftps_noffs = 1; 89 ftp->ftps_offs[0] = off; 90 91 if (ioctl(dtp->dt_ftfd, FASTTRAPIOC_MAKEPROBE, ftp) != 0) { 92 dt_dprintf("fasttrap probe creation ioctl failed: %s\n", 93 strerror(errno)); 94 return (dt_set_errno(dtp, errno)); 95 } 96 97 return (1); 98 } 99 100 /*ARGSUSED*/ 101 int 102 dt_pid_create_glob_offset_probes(struct ps_prochandle *P, dtrace_hdl_t *dtp, 103 fasttrap_probe_spec_t *ftp, const GElf_Sym *symp, const char *pattern) 104 { 105 ulong_t i; 106 107 ftp->ftps_type = DTFTP_OFFSETS; 108 ftp->ftps_pc = (uintptr_t)symp->st_value; 109 ftp->ftps_size = (size_t)symp->st_size; 110 ftp->ftps_noffs = 0; 111 112 /* 113 * If we're matching against everything, just iterate through each 114 * instruction in the function, otherwise look for matching offset 115 * names by constructing the string and comparing it against the 116 * pattern. 117 */ 118 if (strcmp("*", pattern) == 0) { 119 for (i = 0; i < symp->st_size; i += 4) { 120 ftp->ftps_offs[ftp->ftps_noffs++] = i; 121 } 122 } else { 123 char name[sizeof (i) * 2 + 1]; 124 125 for (i = 0; i < symp->st_size; i += 4) { 126 (void) sprintf(name, "%lx", i); 127 if (gmatch(name, pattern)) 128 ftp->ftps_offs[ftp->ftps_noffs++] = i; 129 } 130 } 131 132 if (ioctl(dtp->dt_ftfd, FASTTRAPIOC_MAKEPROBE, ftp) != 0) { 133 dt_dprintf("fasttrap probe creation ioctl failed: %s\n", 134 strerror(errno)); 135 return (dt_set_errno(dtp, errno)); 136 } 137 138 return (ftp->ftps_noffs); 139 } 140