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 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 /* 26 * Copyright 2012 DEY Storage Systems, Inc. All rights reserved. 27 * Copyright (c) 2013 by Delphix. All rights reserved. 28 * Copyright 2018 Joyent, Inc. 29 * Copyright 2020 OmniOS Community Edition (OmniOSce) Association. 30 */ 31 32 #ifndef _PCONTROL_H 33 #define _PCONTROL_H 34 35 /* 36 * Implemention-specific include file for libproc process management. 37 * This is not to be seen by the clients of libproc. 38 */ 39 40 #include <stdio.h> 41 #include <gelf.h> 42 #include <synch.h> 43 #include <procfs.h> 44 #include <rtld_db.h> 45 #include <libproc.h> 46 #include <libctf.h> 47 #include <limits.h> 48 #include <libproc.h> 49 #include <thread.h> 50 #include <sys/secflags.h> 51 52 #ifdef __cplusplus 53 extern "C" { 54 #endif 55 56 #include "Putil.h" 57 58 /* 59 * Definitions of the process control structures, internal to libproc. 60 * These may change without affecting clients of libproc. 61 */ 62 63 /* 64 * sym_tbl_t contains a primary and an (optional) auxiliary symbol table, which 65 * we wish to treat as a single logical symbol table. In this logical table, 66 * the data from the auxiliary table preceeds that from the primary. Symbol 67 * indices start at [0], which is the first item in the auxiliary table 68 * if there is one. The sole purpose for this is so that we can treat the 69 * combination of .SUNW_ldynsym and .dynsym sections as a logically single 70 * entity without having to violate the public interface to libelf. 71 * 72 * Both tables must share the same string table section. 73 * 74 * The symtab_getsym() function serves as a gelf_getsym() replacement 75 * that is aware of the two tables and makes them look like a single table 76 * to the caller. 77 * 78 */ 79 typedef struct sym_tbl { /* symbol table */ 80 Elf_Data *sym_data_pri; /* primary table */ 81 Elf_Data *sym_data_aux; /* auxiliary table */ 82 size_t sym_symn_aux; /* number of entries in auxiliary table */ 83 size_t sym_symn; /* total number of entries in both tables */ 84 char *sym_strs; /* ptr to strings */ 85 size_t sym_strsz; /* size of string table */ 86 GElf_Shdr sym_hdr_pri; /* primary symbol table section header */ 87 GElf_Shdr sym_hdr_aux; /* auxiliary symbol table section header */ 88 GElf_Shdr sym_strhdr; /* string table section header */ 89 Elf *sym_elf; /* faked-up ELF handle from core file */ 90 void *sym_elfmem; /* data for faked-up ELF handle */ 91 uint_t *sym_byname; /* symbols sorted by name */ 92 uint_t *sym_byaddr; /* symbols sorted by addr */ 93 size_t sym_count; /* number of symbols in each sorted list */ 94 } sym_tbl_t; 95 96 typedef struct file_info { /* symbol information for a mapped file */ 97 plist_t file_list; /* linked list */ 98 char file_pname[PATH_MAX]; /* name from prmap_t */ 99 struct map_info *file_map; /* primary (text) mapping */ 100 int file_ref; /* references from map_info_t structures */ 101 int file_fd; /* file descriptor for the mapped file */ 102 int file_init; /* 0: initialization yet to be performed */ 103 GElf_Half file_etype; /* ELF e_type from ehdr */ 104 GElf_Half file_class; /* ELF e_ident[EI_CLASS] from ehdr */ 105 rd_loadobj_t *file_lo; /* load object structure from rtld_db */ 106 char *file_lname; /* load object name from rtld_db */ 107 char *file_lbase; /* pointer to basename of file_lname */ 108 char *file_rname; /* resolved on-disk object pathname */ 109 char *file_rbase; /* pointer to basename of file_rname */ 110 Elf *file_elf; /* ELF handle so we can close */ 111 void *file_elfmem; /* data for faked-up ELF handle */ 112 sym_tbl_t file_symtab; /* symbol table */ 113 sym_tbl_t file_dynsym; /* dynamic symbol table */ 114 uintptr_t file_dyn_base; /* load address for ET_DYN files */ 115 uintptr_t file_plt_base; /* base address for PLT */ 116 size_t file_plt_size; /* size of PLT region */ 117 uintptr_t file_jmp_rel; /* base address of PLT relocations */ 118 uintptr_t file_ctf_off; /* offset of CTF data in object file */ 119 size_t file_ctf_size; /* size of CTF data in object file */ 120 int file_ctf_dyn; /* does the CTF data reference the dynsym */ 121 void *file_ctf_buf; /* CTF data for this file */ 122 ctf_file_t *file_ctfp; /* CTF container for this file */ 123 char *file_shstrs; /* section header string table */ 124 size_t file_shstrsz; /* section header string table size */ 125 uintptr_t *file_saddrs; /* section header addresses */ 126 uint_t file_nsaddrs; /* number of section header addresses */ 127 } file_info_t; 128 129 typedef struct map_info { /* description of an address space mapping */ 130 prmap_t map_pmap; /* /proc description of this mapping */ 131 file_info_t *map_file; /* pointer into list of mapped files */ 132 off64_t map_offset; /* offset into core file (if core) */ 133 int map_relocate; /* associated file_map needs to be relocated */ 134 } map_info_t; 135 136 typedef struct lwp_info { /* per-lwp information from core file */ 137 plist_t lwp_list; /* linked list */ 138 lwpid_t lwp_id; /* lwp identifier */ 139 lwpsinfo_t lwp_psinfo; /* /proc/<pid>/lwp/<lwpid>/lwpsinfo data */ 140 lwpstatus_t lwp_status; /* /proc/<pid>/lwp/<lwpid>/lwpstatus data */ 141 char lwp_name[THREAD_NAME_MAX]; 142 #if defined(sparc) || defined(__sparc) 143 gwindows_t *lwp_gwins; /* /proc/<pid>/lwp/<lwpid>/gwindows data */ 144 prxregset_t *lwp_xregs; /* /proc/<pid>/lwp/<lwpid>/xregs data */ 145 int64_t *lwp_asrs; /* /proc/<pid>/lwp/<lwpid>/asrs data */ 146 #endif 147 } lwp_info_t; 148 149 typedef struct fd_info { 150 plist_t fd_list; /* linked list */ 151 prfdinfo_t *fd_info; /* fd info */ 152 } fd_info_t; 153 154 typedef struct core_info { /* information specific to core files */ 155 char core_dmodel; /* data model for core file */ 156 char core_osabi; /* ELF OS ABI */ 157 int core_errno; /* error during initialization if != 0 */ 158 plist_t core_lwp_head; /* head of list of lwp info */ 159 lwp_info_t *core_lwp; /* current lwp information */ 160 uint_t core_nlwp; /* number of lwp's in list */ 161 off64_t core_size; /* size of core file in bytes */ 162 char *core_platform; /* platform string from core file */ 163 struct utsname *core_uts; /* uname(2) data from core file */ 164 prcred_t *core_cred; /* process credential from core file */ 165 core_content_t core_content; /* content dumped to core file */ 166 prpriv_t *core_priv; /* process privileges from core file */ 167 size_t core_priv_size; /* size of the privileges */ 168 void *core_privinfo; /* system privileges info from core file */ 169 priv_impl_info_t *core_ppii; /* NOTE entry for core_privinfo */ 170 char *core_zonename; /* zone name from core file */ 171 prsecflags_t *core_secflags; /* secflags from core file */ 172 #if defined(__i386) || defined(__amd64) 173 struct ssd *core_ldt; /* LDT entries from core file */ 174 uint_t core_nldt; /* number of LDT entries in core file */ 175 #endif 176 } core_info_t; 177 178 typedef struct elf_file_header { /* extended ELF header */ 179 unsigned char e_ident[EI_NIDENT]; 180 Elf64_Half e_type; 181 Elf64_Half e_machine; 182 Elf64_Word e_version; 183 Elf64_Addr e_entry; 184 Elf64_Off e_phoff; 185 Elf64_Off e_shoff; 186 Elf64_Word e_flags; 187 Elf64_Half e_ehsize; 188 Elf64_Half e_phentsize; 189 Elf64_Half e_shentsize; 190 Elf64_Word e_phnum; /* phdr count extended to 32 bits */ 191 Elf64_Word e_shnum; /* shdr count extended to 32 bits */ 192 Elf64_Word e_shstrndx; /* shdr string index extended to 32 bits */ 193 } elf_file_header_t; 194 195 typedef struct elf_file { /* convenience for managing ELF files */ 196 elf_file_header_t e_hdr; /* Extended ELF header */ 197 Elf *e_elf; /* ELF library handle */ 198 int e_fd; /* file descriptor */ 199 } elf_file_t; 200 201 #define HASHSIZE 1024 /* hash table size, power of 2 */ 202 203 struct ps_prochandle { 204 struct ps_lwphandle **hashtab; /* hash table for LWPs (Lgrab()) */ 205 mutex_t proc_lock; /* protects hash table; serializes Lgrab() */ 206 pstatus_t orig_status; /* remembered status on Pgrab() */ 207 pstatus_t status; /* status when stopped */ 208 psinfo_t psinfo; /* psinfo_t from last Ppsinfo() request */ 209 uintptr_t sysaddr; /* address of most recent syscall instruction */ 210 pid_t pid; /* process-ID */ 211 int state; /* state of the process, see "libproc.h" */ 212 uint_t flags; /* see defines below */ 213 uint_t agentcnt; /* Pcreate_agent()/Pdestroy_agent() ref count */ 214 int asfd; /* /proc/<pid>/as filedescriptor */ 215 int ctlfd; /* /proc/<pid>/ctl filedescriptor */ 216 int statfd; /* /proc/<pid>/status filedescriptor */ 217 int agentctlfd; /* /proc/<pid>/lwp/agent/ctl */ 218 int agentstatfd; /* /proc/<pid>/lwp/agent/status */ 219 int info_valid; /* if zero, map and file info need updating */ 220 map_info_t *mappings; /* cached process mappings */ 221 size_t map_count; /* number of mappings */ 222 size_t map_alloc; /* number of mappings allocated */ 223 uint_t num_files; /* number of file elements in file_info */ 224 plist_t file_head; /* head of mapped files w/ symbol table info */ 225 char *execname; /* name of the executable file */ 226 auxv_t *auxv; /* the process's aux vector */ 227 int nauxv; /* number of aux vector entries */ 228 rd_agent_t *rap; /* cookie for rtld_db */ 229 map_info_t *map_exec; /* the mapping for the executable file */ 230 map_info_t *map_ldso; /* the mapping for ld.so.1 */ 231 ps_ops_t ops; /* ops-vector */ 232 uintptr_t *ucaddrs; /* ucontext-list addresses */ 233 uint_t ucnelems; /* number of elements in the ucaddrs list */ 234 char *zoneroot; /* cached path to zone root */ 235 plist_t fd_head; /* head of file desc info list */ 236 int num_fd; /* number of file descs in list */ 237 uintptr_t map_missing; /* first missing mapping in core due to sig */ 238 siginfo_t killinfo; /* signal that interrupted core dump */ 239 psinfo_t spymaster; /* agent LWP's spymaster, if any */ 240 void *data; /* private data */ 241 }; 242 243 /* flags */ 244 #define CREATED 0x01 /* process was created by Pcreate() */ 245 #define SETSIG 0x02 /* set signal trace mask before continuing */ 246 #define SETFAULT 0x04 /* set fault trace mask before continuing */ 247 #define SETENTRY 0x08 /* set sysentry trace mask before continuing */ 248 #define SETEXIT 0x10 /* set sysexit trace mask before continuing */ 249 #define SETHOLD 0x20 /* set signal hold mask before continuing */ 250 #define SETREGS 0x40 /* set registers before continuing */ 251 #define INCORE 0x80 /* use in-core data to build symbol tables */ 252 253 struct ps_lwphandle { 254 struct ps_prochandle *lwp_proc; /* process to which this lwp belongs */ 255 struct ps_lwphandle *lwp_hash; /* hash table linked list */ 256 lwpstatus_t lwp_status; /* status when stopped */ 257 lwpsinfo_t lwp_psinfo; /* lwpsinfo_t from last Lpsinfo() */ 258 lwpid_t lwp_id; /* lwp identifier */ 259 int lwp_state; /* state of the lwp, see "libproc.h" */ 260 uint_t lwp_flags; /* SETHOLD and/or SETREGS */ 261 int lwp_ctlfd; /* /proc/<pid>/lwp/<lwpid>/lwpctl */ 262 int lwp_statfd; /* /proc/<pid>/lwp/<lwpid>/lwpstatus */ 263 }; 264 265 /* 266 * Implementation functions in the process control library. 267 * These are not exported to clients of the library. 268 */ 269 extern void prldump(const char *, lwpstatus_t *); 270 extern int dupfd(int, int); 271 extern int set_minfd(void); 272 extern int Pscantext(struct ps_prochandle *); 273 extern void Pinitsym(struct ps_prochandle *); 274 extern void Preadauxvec(struct ps_prochandle *); 275 extern void optimize_symtab(sym_tbl_t *); 276 extern void Pbuild_file_symtab(struct ps_prochandle *, file_info_t *); 277 extern ctf_file_t *Pbuild_file_ctf(struct ps_prochandle *, file_info_t *); 278 extern map_info_t *Paddr2mptr(struct ps_prochandle *, uintptr_t); 279 extern char *Pfindexec(struct ps_prochandle *, const char *, 280 int (*)(const char *, void *), void *); 281 extern int getlwpstatus(struct ps_prochandle *, lwpid_t, lwpstatus_t *); 282 int Pstopstatus(struct ps_prochandle *, long, uint32_t); 283 extern file_info_t *file_info_new(struct ps_prochandle *, map_info_t *); 284 extern char *Plofspath(const char *, char *, size_t); 285 extern char *Pzoneroot(struct ps_prochandle *, char *, size_t); 286 extern char *Pzonepath(struct ps_prochandle *, const char *, char *, 287 size_t); 288 extern fd_info_t *Pfd2info(struct ps_prochandle *, int); 289 290 extern char *Pfindmap(struct ps_prochandle *, map_info_t *, char *, 291 size_t); 292 293 extern int Padd_mapping(struct ps_prochandle *, off64_t, file_info_t *, 294 prmap_t *); 295 extern void Psort_mappings(struct ps_prochandle *); 296 297 extern char procfs_path[PATH_MAX]; 298 299 /* 300 * Architecture-dependent definition of the breakpoint instruction. 301 */ 302 #if defined(sparc) || defined(__sparc) 303 #define BPT ((instr_t)0x91d02001) 304 #elif defined(__i386) || defined(__amd64) 305 #define BPT ((instr_t)0xcc) 306 #endif 307 308 /* 309 * Simple convenience. 310 */ 311 #define TRUE 1 312 #define FALSE 0 313 314 #ifdef __cplusplus 315 } 316 #endif 317 318 #endif /* _PCONTROL_H */ 319