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 * 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 #include <sys/ioctl.h> 38 39 #include <dt_impl.h> 40 #include <dt_pid.h> 41 42 #ifndef illumos 43 #include <libproc_compat.h> 44 #endif 45 46 #define OP(x) ((x) >> 30) 47 #define OP2(x) (((x) >> 22) & 0x07) 48 #define COND(x) (((x) >> 25) & 0x0f) 49 #define A(x) (((x) >> 29) & 0x01) 50 51 #define OP_BRANCH 0 52 53 #define OP2_BPcc 0x1 54 #define OP2_Bicc 0x2 55 #define OP2_BPr 0x3 56 #define OP2_FBPfcc 0x5 57 #define OP2_FBfcc 0x6 58 59 /*ARGSUSED*/ 60 int 61 dt_pid_create_entry_probe(struct ps_prochandle *P, dtrace_hdl_t *dtp, 62 fasttrap_probe_spec_t *ftp, const GElf_Sym *symp) 63 { 64 ftp->ftps_type = DTFTP_ENTRY; 65 ftp->ftps_pc = (uintptr_t)symp->st_value; 66 ftp->ftps_size = (size_t)symp->st_size; 67 ftp->ftps_noffs = 1; 68 ftp->ftps_offs[0] = 0; 69 70 if (ioctl(dtp->dt_ftfd, FASTTRAPIOC_MAKEPROBE, ftp) != 0) { 71 dt_dprintf("fasttrap probe creation ioctl failed: %s\n", 72 strerror(errno)); 73 return (dt_set_errno(dtp, errno)); 74 } 75 76 return (1); 77 } 78 79 int 80 dt_pid_create_return_probe(struct ps_prochandle *P, dtrace_hdl_t *dtp, 81 fasttrap_probe_spec_t *ftp, const GElf_Sym *symp, uint64_t *stret) 82 { 83 84 uint32_t *text; 85 int i; 86 int srdepth = 0; 87 88 dt_dprintf("%s: unimplemented\n", __func__); 89 return (DT_PROC_ERR); 90 91 if ((text = malloc(symp->st_size + 4)) == NULL) { 92 dt_dprintf("mr sparkle: malloc() failed\n"); 93 return (DT_PROC_ERR); 94 } 95 96 if (Pread(P, text, symp->st_size, symp->st_value) != symp->st_size) { 97 dt_dprintf("mr sparkle: Pread() failed\n"); 98 free(text); 99 return (DT_PROC_ERR); 100 } 101 102 /* 103 * Leave a dummy instruction in the last slot to simplify edge 104 * conditions. 105 */ 106 text[symp->st_size / 4] = 0; 107 108 ftp->ftps_type = DTFTP_RETURN; 109 ftp->ftps_pc = symp->st_value; 110 ftp->ftps_size = symp->st_size; 111 ftp->ftps_noffs = 0; 112 113 114 free(text); 115 if (ftp->ftps_noffs > 0) { 116 if (ioctl(dtp->dt_ftfd, FASTTRAPIOC_MAKEPROBE, ftp) != 0) { 117 dt_dprintf("fasttrap probe creation ioctl failed: %s\n", 118 strerror(errno)); 119 return (dt_set_errno(dtp, errno)); 120 } 121 } 122 123 124 return (ftp->ftps_noffs); 125 } 126 127 /*ARGSUSED*/ 128 int 129 dt_pid_create_offset_probe(struct ps_prochandle *P, dtrace_hdl_t *dtp, 130 fasttrap_probe_spec_t *ftp, const GElf_Sym *symp, ulong_t off) 131 { 132 if (off & 0x3) 133 return (DT_PROC_ALIGN); 134 135 ftp->ftps_type = DTFTP_OFFSETS; 136 ftp->ftps_pc = (uintptr_t)symp->st_value; 137 ftp->ftps_size = (size_t)symp->st_size; 138 ftp->ftps_noffs = 1; 139 ftp->ftps_offs[0] = off; 140 141 if (ioctl(dtp->dt_ftfd, FASTTRAPIOC_MAKEPROBE, ftp) != 0) { 142 dt_dprintf("fasttrap probe creation ioctl failed: %s\n", 143 strerror(errno)); 144 return (dt_set_errno(dtp, errno)); 145 } 146 147 return (1); 148 } 149 150 /*ARGSUSED*/ 151 int 152 dt_pid_create_glob_offset_probes(struct ps_prochandle *P, dtrace_hdl_t *dtp, 153 fasttrap_probe_spec_t *ftp, const GElf_Sym *symp, const char *pattern) 154 { 155 ulong_t i; 156 157 ftp->ftps_type = DTFTP_OFFSETS; 158 ftp->ftps_pc = (uintptr_t)symp->st_value; 159 ftp->ftps_size = (size_t)symp->st_size; 160 ftp->ftps_noffs = 0; 161 162 /* 163 * If we're matching against everything, just iterate through each 164 * instruction in the function, otherwise look for matching offset 165 * names by constructing the string and comparing it against the 166 * pattern. 167 */ 168 if (strcmp("*", pattern) == 0) { 169 for (i = 0; i < symp->st_size; i += 4) { 170 ftp->ftps_offs[ftp->ftps_noffs++] = i; 171 } 172 } else { 173 char name[sizeof (i) * 2 + 1]; 174 175 for (i = 0; i < symp->st_size; i += 4) { 176 (void) snprintf(name, sizeof(name), "%lx", i); 177 if (gmatch(name, pattern)) 178 ftp->ftps_offs[ftp->ftps_noffs++] = i; 179 } 180 } 181 182 if (ioctl(dtp->dt_ftfd, FASTTRAPIOC_MAKEPROBE, ftp) != 0) { 183 dt_dprintf("fasttrap probe creation ioctl failed: %s\n", 184 strerror(errno)); 185 return (dt_set_errno(dtp, errno)); 186 } 187 188 return (ftp->ftps_noffs); 189 } 190