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