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 * Copyright 2021 Oxide Computer Company 31 */ 32 33 #ifndef _PCONTROL_H 34 #define _PCONTROL_H 35 36 /* 37 * Implemention-specific include file for libproc process management. 38 * This is not to be seen by the clients of libproc. 39 */ 40 41 #include <stdio.h> 42 #include <gelf.h> 43 #include <synch.h> 44 #include <procfs.h> 45 #include <rtld_db.h> 46 #include <libproc.h> 47 #include <libctf.h> 48 #include <limits.h> 49 #include <libproc.h> 50 #include <thread.h> 51 #include <sys/secflags.h> 52 #include <sys/list.h> 53 54 #ifdef __cplusplus 55 extern "C" { 56 #endif 57 58 #include "Putil.h" 59 60 /* 61 * Definitions of the process control structures, internal to libproc. 62 * These may change without affecting clients of libproc. 63 */ 64 65 /* 66 * sym_tbl_t contains a primary and an (optional) auxiliary symbol table, which 67 * we wish to treat as a single logical symbol table. In this logical table, 68 * the data from the auxiliary table preceeds that from the primary. Symbol 69 * indices start at [0], which is the first item in the auxiliary table 70 * if there is one. The sole purpose for this is so that we can treat the 71 * combination of .SUNW_ldynsym and .dynsym sections as a logically single 72 * entity without having to violate the public interface to libelf. 73 * 74 * Both tables must share the same string table section. 75 * 76 * The symtab_getsym() function serves as a gelf_getsym() replacement 77 * that is aware of the two tables and makes them look like a single table 78 * to the caller. 79 * 80 */ 81 typedef struct sym_tbl { /* symbol table */ 82 Elf_Data *sym_data_pri; /* primary table */ 83 Elf_Data *sym_data_aux; /* auxiliary table */ 84 size_t sym_symn_aux; /* number of entries in auxiliary table */ 85 size_t sym_symn; /* total number of entries in both tables */ 86 char *sym_strs; /* ptr to strings */ 87 size_t sym_strsz; /* size of string table */ 88 GElf_Shdr sym_hdr_pri; /* primary symbol table section header */ 89 GElf_Shdr sym_hdr_aux; /* auxiliary symbol table section header */ 90 GElf_Shdr sym_strhdr; /* string table section header */ 91 Elf *sym_elf; /* faked-up ELF handle from core file */ 92 void *sym_elfmem; /* data for faked-up ELF handle */ 93 uint_t *sym_byname; /* symbols sorted by name */ 94 uint_t *sym_byaddr; /* symbols sorted by addr */ 95 size_t sym_count; /* number of symbols in each sorted list */ 96 } sym_tbl_t; 97 98 typedef struct file_info { /* symbol information for a mapped file */ 99 list_node_t file_list; /* linked list */ 100 char file_pname[PATH_MAX]; /* name from prmap_t */ 101 struct map_info *file_map; /* primary (text) mapping */ 102 int file_ref; /* references from map_info_t structures */ 103 int file_fd; /* file descriptor for the mapped file */ 104 int file_dbgfile; /* file descriptor for the debug file */ 105 int file_init; /* 0: initialization yet to be performed */ 106 GElf_Half file_etype; /* ELF e_type from ehdr */ 107 GElf_Half file_class; /* ELF e_ident[EI_CLASS] from ehdr */ 108 rd_loadobj_t *file_lo; /* load object structure from rtld_db */ 109 char *file_lname; /* load object name from rtld_db */ 110 char *file_lbase; /* pointer to basename of file_lname */ 111 char *file_rname; /* resolved on-disk object pathname */ 112 char *file_rbase; /* pointer to basename of file_rname */ 113 Elf *file_elf; /* ELF handle so we can close */ 114 Elf *file_dbgelf; /* Debug ELF handle so we can close */ 115 void *file_elfmem; /* data for faked-up ELF handle */ 116 sym_tbl_t file_symtab; /* symbol table */ 117 sym_tbl_t file_dynsym; /* dynamic symbol table */ 118 uintptr_t file_dyn_base; /* load address for ET_DYN files */ 119 uintptr_t file_plt_base; /* base address for PLT */ 120 size_t file_plt_size; /* size of PLT region */ 121 uintptr_t file_jmp_rel; /* base address of PLT relocations */ 122 uintptr_t file_ctf_off; /* offset of CTF data in object file */ 123 size_t file_ctf_size; /* size of CTF data in object file */ 124 int file_ctf_dyn; /* does the CTF data reference the dynsym */ 125 void *file_ctf_buf; /* CTF data for this file */ 126 ctf_file_t *file_ctfp; /* CTF container for this file */ 127 char *file_shstrs; /* section header string table */ 128 size_t file_shstrsz; /* section header string table size */ 129 uintptr_t *file_saddrs; /* section header addresses */ 130 uint_t file_nsaddrs; /* number of section header addresses */ 131 } file_info_t; 132 133 typedef struct map_info { /* description of an address space mapping */ 134 prmap_t map_pmap; /* /proc description of this mapping */ 135 file_info_t *map_file; /* pointer into list of mapped files */ 136 off64_t map_offset; /* offset into core file (if core) */ 137 int map_relocate; /* associated file_map needs to be relocated */ 138 } map_info_t; 139 140 typedef struct lwp_info { /* per-lwp information from core file */ 141 list_node_t lwp_list; /* linked list */ 142 lwpid_t lwp_id; /* lwp identifier */ 143 lwpsinfo_t lwp_psinfo; /* /proc/<pid>/lwp/<lwpid>/lwpsinfo data */ 144 lwpstatus_t lwp_status; /* /proc/<pid>/lwp/<lwpid>/lwpstatus data */ 145 char lwp_name[THREAD_NAME_MAX]; 146 #if defined(sparc) || defined(__sparc) 147 gwindows_t *lwp_gwins; /* /proc/<pid>/lwp/<lwpid>/gwindows data */ 148 prxregset_t *lwp_xregs; /* /proc/<pid>/lwp/<lwpid>/xregs data */ 149 int64_t *lwp_asrs; /* /proc/<pid>/lwp/<lwpid>/asrs data */ 150 #endif 151 } lwp_info_t; 152 153 typedef struct fd_info { 154 list_node_t fd_list; /* linked list */ 155 prfdinfo_t *fd_info; /* fd info */ 156 } fd_info_t; 157 158 typedef struct core_info { /* information specific to core files */ 159 char core_dmodel; /* data model for core file */ 160 char core_osabi; /* ELF OS ABI */ 161 int core_errno; /* error during initialization if != 0 */ 162 list_t core_lwp_head; /* head of list of lwp info */ 163 lwp_info_t *core_lwp; /* current lwp information */ 164 off64_t core_size; /* size of core file in bytes */ 165 char *core_platform; /* platform string from core file */ 166 struct utsname *core_uts; /* uname(2) data from core file */ 167 prcred_t *core_cred; /* process credential from core file */ 168 core_content_t core_content; /* content dumped to core file */ 169 prpriv_t *core_priv; /* process privileges from core file */ 170 size_t core_priv_size; /* size of the privileges */ 171 void *core_privinfo; /* system privileges info from core file */ 172 priv_impl_info_t *core_ppii; /* NOTE entry for core_privinfo */ 173 char *core_zonename; /* zone name from core file */ 174 prsecflags_t *core_secflags; /* secflags from core file */ 175 prupanic_t *core_upanic; /* upanic from core file */ 176 #if defined(__i386) || defined(__amd64) 177 struct ssd *core_ldt; /* LDT entries from core file */ 178 uint_t core_nldt; /* number of LDT entries in core file */ 179 #endif 180 } core_info_t; 181 182 typedef struct elf_file_header { /* extended ELF header */ 183 unsigned char e_ident[EI_NIDENT]; 184 Elf64_Half e_type; 185 Elf64_Half e_machine; 186 Elf64_Word e_version; 187 Elf64_Addr e_entry; 188 Elf64_Off e_phoff; 189 Elf64_Off e_shoff; 190 Elf64_Word e_flags; 191 Elf64_Half e_ehsize; 192 Elf64_Half e_phentsize; 193 Elf64_Half e_shentsize; 194 Elf64_Word e_phnum; /* phdr count extended to 32 bits */ 195 Elf64_Word e_shnum; /* shdr count extended to 32 bits */ 196 Elf64_Word e_shstrndx; /* shdr string index extended to 32 bits */ 197 } elf_file_header_t; 198 199 typedef struct elf_file { /* convenience for managing ELF files */ 200 elf_file_header_t e_hdr; /* Extended ELF header */ 201 Elf *e_elf; /* ELF library handle */ 202 int e_fd; /* file descriptor */ 203 } elf_file_t; 204 205 #define HASHSIZE 1024 /* hash table size, power of 2 */ 206 207 struct ps_prochandle { 208 struct ps_lwphandle **hashtab; /* hash table for LWPs (Lgrab()) */ 209 mutex_t proc_lock; /* protects hash table; serializes Lgrab() */ 210 pstatus_t orig_status; /* remembered status on Pgrab() */ 211 pstatus_t status; /* status when stopped */ 212 psinfo_t psinfo; /* psinfo_t from last Ppsinfo() request */ 213 uintptr_t sysaddr; /* address of most recent syscall instruction */ 214 pid_t pid; /* process-ID */ 215 int state; /* state of the process, see "libproc.h" */ 216 uint_t flags; /* see defines below */ 217 uint_t agentcnt; /* Pcreate_agent()/Pdestroy_agent() ref count */ 218 int asfd; /* /proc/<pid>/as filedescriptor */ 219 int ctlfd; /* /proc/<pid>/ctl filedescriptor */ 220 int statfd; /* /proc/<pid>/status filedescriptor */ 221 int agentctlfd; /* /proc/<pid>/lwp/agent/ctl */ 222 int agentstatfd; /* /proc/<pid>/lwp/agent/status */ 223 int info_valid; /* if zero, map and file info need updating */ 224 map_info_t *mappings; /* cached process mappings */ 225 size_t map_count; /* number of mappings */ 226 size_t map_alloc; /* number of mappings allocated */ 227 uint_t num_files; /* number of file elements in file_info */ 228 list_t file_head; /* head of mapped files w/ symbol table info */ 229 char *execname; /* name of the executable file */ 230 auxv_t *auxv; /* the process's aux vector */ 231 int nauxv; /* number of aux vector entries */ 232 rd_agent_t *rap; /* cookie for rtld_db */ 233 map_info_t *map_exec; /* the mapping for the executable file */ 234 map_info_t *map_ldso; /* the mapping for ld.so.1 */ 235 ps_ops_t ops; /* ops-vector */ 236 uintptr_t *ucaddrs; /* ucontext-list addresses */ 237 uint_t ucnelems; /* number of elements in the ucaddrs list */ 238 char *zoneroot; /* cached path to zone root */ 239 list_t fd_head; /* head of file desc info list */ 240 uintptr_t map_missing; /* first missing mapping in core due to sig */ 241 siginfo_t killinfo; /* signal that interrupted core dump */ 242 psinfo_t spymaster; /* agent LWP's spymaster, if any */ 243 void *data; /* private data */ 244 }; 245 246 /* flags */ 247 #define CREATED 0x01 /* process was created by Pcreate() */ 248 #define SETSIG 0x02 /* set signal trace mask before continuing */ 249 #define SETFAULT 0x04 /* set fault trace mask before continuing */ 250 #define SETENTRY 0x08 /* set sysentry trace mask before continuing */ 251 #define SETEXIT 0x10 /* set sysexit trace mask before continuing */ 252 #define SETHOLD 0x20 /* set signal hold mask before continuing */ 253 #define SETREGS 0x40 /* set registers before continuing */ 254 #define INCORE 0x80 /* use in-core data to build symbol tables */ 255 256 struct ps_lwphandle { 257 struct ps_prochandle *lwp_proc; /* process to which this lwp belongs */ 258 struct ps_lwphandle *lwp_hash; /* hash table linked list */ 259 lwpstatus_t lwp_status; /* status when stopped */ 260 lwpsinfo_t lwp_psinfo; /* lwpsinfo_t from last Lpsinfo() */ 261 lwpid_t lwp_id; /* lwp identifier */ 262 int lwp_state; /* state of the lwp, see "libproc.h" */ 263 uint_t lwp_flags; /* SETHOLD and/or SETREGS */ 264 int lwp_ctlfd; /* /proc/<pid>/lwp/<lwpid>/lwpctl */ 265 int lwp_statfd; /* /proc/<pid>/lwp/<lwpid>/lwpstatus */ 266 }; 267 268 /* 269 * Implementation functions in the process control library. 270 * These are not exported to clients of the library. 271 */ 272 extern void prldump(const char *, lwpstatus_t *); 273 extern int dupfd(int, int); 274 extern int set_minfd(void); 275 extern int Pscantext(struct ps_prochandle *); 276 extern void Pinitsym(struct ps_prochandle *); 277 extern void Pinitfd(struct ps_prochandle *); 278 extern void Preadauxvec(struct ps_prochandle *); 279 extern void optimize_symtab(sym_tbl_t *); 280 extern void Pbuild_file_symtab(struct ps_prochandle *, file_info_t *); 281 extern ctf_file_t *Pbuild_file_ctf(struct ps_prochandle *, file_info_t *); 282 extern map_info_t *Paddr2mptr(struct ps_prochandle *, uintptr_t); 283 extern char *Pfindexec(struct ps_prochandle *, const char *, 284 int (*)(const char *, void *), void *); 285 extern int getlwpstatus(struct ps_prochandle *, lwpid_t, lwpstatus_t *); 286 int Pstopstatus(struct ps_prochandle *, long, uint32_t); 287 extern file_info_t *file_info_new(struct ps_prochandle *, map_info_t *); 288 extern char *Plofspath(const char *, char *, size_t); 289 extern char *Pzoneroot(struct ps_prochandle *, char *, size_t); 290 extern char *Pzonepath(struct ps_prochandle *, const char *, char *, 291 size_t); 292 extern fd_info_t *Pfd2info(struct ps_prochandle *, int); 293 294 extern char *Pfindmap(struct ps_prochandle *, map_info_t *, char *, 295 size_t); 296 297 extern int Padd_mapping(struct ps_prochandle *, off64_t, file_info_t *, 298 prmap_t *); 299 extern void Psort_mappings(struct ps_prochandle *); 300 301 extern char procfs_path[PATH_MAX]; 302 303 /* 304 * Architecture-dependent definition of the breakpoint instruction. 305 */ 306 #if defined(sparc) || defined(__sparc) 307 #define BPT ((instr_t)0x91d02001) 308 #elif defined(__i386) || defined(__amd64) 309 #define BPT ((instr_t)0xcc) 310 #endif 311 312 /* 313 * Simple convenience. 314 */ 315 #define TRUE 1 316 #define FALSE 0 317 318 #ifdef __cplusplus 319 } 320 #endif 321 322 #endif /* _PCONTROL_H */ 323