0
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1 /*
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2 * Copyright 2002-2003 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 /*
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26 * Interfaces available from the process control library, libproc.
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27 *
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28 * libproc provides process control functions for the /proc tools
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29 * (commands in /usr/proc/bin), /usr/bin/truss, and /usr/bin/gcore.
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30 * libproc is a private support library for these commands only.
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31 * It is _not_ a public interface, although it might become one
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32 * in the fullness of time, when the interfaces settle down.
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33 *
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34 * In the meantime, be aware that any program linked with libproc in this
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35 * release of Solaris is almost guaranteed to break in the next release.
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36 *
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37 * In short, do not use this header file or libproc for any purpose.
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38 */
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39
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40 #ifndef _LIBPROC_H
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41 #define _LIBPROC_H
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42
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43 #include <stdlib.h>
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44 #include <unistd.h>
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45 #include <fcntl.h>
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46 #include <nlist.h>
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47 #include <door.h>
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48 #include <gelf.h>
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49 #include <proc_service.h>
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50 #include <rtld_db.h>
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51 #include <procfs.h>
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52 #include <sys/stat.h>
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53 #include <sys/statvfs.h>
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54 #include <sys/auxv.h>
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55 #include <sys/resource.h>
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56 #include <sys/socket.h>
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57 #include <sys/utsname.h>
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58
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59 #ifdef __cplusplus
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60 extern "C" {
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61 #endif
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62
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63 /*
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64 * Opaque structure tag reference to a process control structure.
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65 * Clients of libproc cannot look inside the process control structure.
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66 * The implementation of struct ps_prochandle can change w/o affecting clients.
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67 */
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68 struct ps_prochandle;
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69
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70 extern int _libproc_debug; /* set non-zero to enable debugging fprintfs */
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71
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72 #if defined(sparc) || defined(__sparc)
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73 #define R_RVAL1 R_O0 /* register holding a function return value */
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74 #define R_RVAL2 R_O1 /* 32 more bits for a 64-bit return value */
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75 #define SYSCALL32 0x91d02008 /* 32-bit syscall (ta 8) instruction */
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76 #define SYSCALL64 0x91d02040 /* 64-bit syscall (ta 64) instruction */
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77 typedef uint32_t syscall_t; /* holds a syscall instruction */
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78 #endif /* sparc */
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79
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80 #if defined(__i386) || defined(__ia64)
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81 #define R_PC EIP
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82 #define R_SP UESP
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83 #define R_RVAL1 EAX /* register holding a function return value */
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84 #define R_RVAL2 EDX /* 32 more bits for a 64-bit return value */
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85 #define SYSCALL 0x9a /* syscall (lcall) instruction opcode */
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86 typedef uchar_t syscall_t[7]; /* holds a syscall instruction */
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87 #endif /* __i386 || __ia64 */
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88
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89 #define R_RVAL R_RVAL1 /* simple function return value register */
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90
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91 /* maximum sizes of things */
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92 #define PRMAXSIG (32 * sizeof (sigset_t) / sizeof (uint32_t))
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93 #define PRMAXFAULT (32 * sizeof (fltset_t) / sizeof (uint32_t))
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94 #define PRMAXSYS (32 * sizeof (sysset_t) / sizeof (uint32_t))
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95
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96 /* State values returned by Pstate() */
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97 #define PS_RUN 1 /* process is running */
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98 #define PS_STOP 2 /* process is stopped */
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99 #define PS_LOST 3 /* process is lost to control (EAGAIN) */
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100 #define PS_UNDEAD 4 /* process is terminated (zombie) */
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101 #define PS_DEAD 5 /* process is terminated (core file) */
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102
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103 /* Flags accepted by Pgrab() */
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104 #define PGRAB_RETAIN 0x01 /* Retain tracing flags, else clear flags */
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105 #define PGRAB_FORCE 0x02 /* Open the process w/o O_EXCL */
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106 #define PGRAB_RDONLY 0x04 /* Open the process or core w/ O_RDONLY */
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107 #define PGRAB_NOSTOP 0x08 /* Open the process but do not stop it */
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108
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109 /* Error codes from Pcreate() */
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110 #define C_STRANGE -1 /* Unanticipated error, errno is meaningful */
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111 #define C_FORK 1 /* Unable to fork */
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112 #define C_PERM 2 /* No permission (file set-id or unreadable) */
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113 #define C_NOEXEC 3 /* Cannot find executable file */
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114 #define C_INTR 4 /* Interrupt received while creating */
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115 #define C_LP64 5 /* Program is _LP64, self is _ILP32 */
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116
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117 /* Error codes from Pgrab(), Pfgrab_core(), and Pgrab_core() */
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118 #define G_STRANGE -1 /* Unanticipated error, errno is meaningful */
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119 #define G_NOPROC 1 /* No such process */
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120 #define G_NOCORE 2 /* No such core file */
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121 #define G_NOPROCORCORE 3 /* No such proc or core (for proc_arg_grab) */
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122 #define G_NOEXEC 4 /* Cannot locate executable file */
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123 #define G_ZOMB 5 /* Zombie process */
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124 #define G_PERM 6 /* No permission */
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125 #define G_BUSY 7 /* Another process has control */
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126 #define G_SYS 8 /* System process */
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127 #define G_SELF 9 /* Process is self */
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128 #define G_INTR 10 /* Interrupt received while grabbing */
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129 #define G_LP64 11 /* Process is _LP64, self is ILP32 */
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130 #define G_FORMAT 12 /* File is not an ELF format core file */
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131 #define G_ELF 13 /* Libelf error, elf_errno() is meaningful */
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132 #define G_NOTE 14 /* Required PT_NOTE Phdr not present in core */
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133
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134 /* Flags accepted by Prelease */
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135 #define PRELEASE_CLEAR 0x10 /* Clear all tracing flags */
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136 #define PRELEASE_RETAIN 0x20 /* Retain final tracing flags */
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137 #define PRELEASE_HANG 0x40 /* Leave the process stopped */
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138 #define PRELEASE_KILL 0x80 /* Terminate the process */
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139
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140 typedef struct { /* argument descriptor for system call (Psyscall) */
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141 long arg_value; /* value of argument given to system call */
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142 void *arg_object; /* pointer to object in controlling process */
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143 char arg_type; /* AT_BYVAL, AT_BYREF */
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144 char arg_inout; /* AI_INPUT, AI_OUTPUT, AI_INOUT */
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145 ushort_t arg_size; /* if AT_BYREF, size of object in bytes */
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146 } argdes_t;
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147
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148 typedef struct { /* return values from system call (Psyscall) */
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149 int sys_errno; /* syscall error number */
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150 long sys_rval1; /* primary return value from system call */
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151 long sys_rval2; /* second return value from system call */
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152 } sysret_t;
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153
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154 /* values for type */
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155 #define AT_BYVAL 1
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156 #define AT_BYREF 2
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157
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158 /* values for inout */
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159 #define AI_INPUT 1
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160 #define AI_OUTPUT 2
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161 #define AI_INOUT 3
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162
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163 /* maximum number of syscall arguments */
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164 #define MAXARGS 8
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165
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166 /* maximum size in bytes of a BYREF argument */
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167 #define MAXARGL (4*1024)
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168
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169 /* Kludges to make things work on Solaris 2.6 */
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170 #if !defined(_LP64) && !defined(PR_MODEL_UNKNOWN)
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171 #define PR_MODEL_UNKNOWN 0
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172 #define PR_MODEL_ILP32 0 /* process data model is ILP32 */
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173 #define PR_MODEL_LP64 2 /* process data model is LP64 */
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174 #define PR_MODEL_NATIVE PR_MODEL_ILP32
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175 #define pr_dmodel pr_filler[0]
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176 #define STACK_BIAS 0
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177 #endif
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178
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179 /*
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180 * Function prototypes for routines in the process control package.
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181 */
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182 extern struct ps_prochandle *Pcreate(const char *, char *const *,
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183 int *, char *, size_t);
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184
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185 extern const char *Pcreate_error(int);
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186
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187 extern struct ps_prochandle *Pgrab(pid_t, int, int *);
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188 extern struct ps_prochandle *Pgrab_core(const char *, const char *, int, int *);
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189 extern struct ps_prochandle *Pfgrab_core(int, const char *, int *);
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190
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191 extern const char *Pgrab_error(int);
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192
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193 extern int Preopen(struct ps_prochandle *);
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194 extern void Prelease(struct ps_prochandle *, int);
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195 extern void Pfree(struct ps_prochandle *);
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196
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197 extern int Pasfd(struct ps_prochandle *);
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198 extern int Pctlfd(struct ps_prochandle *);
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199 extern int Pcreate_agent(struct ps_prochandle *);
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200 extern void Pdestroy_agent(struct ps_prochandle *);
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201 extern int Pwait(struct ps_prochandle *, uint_t);
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202 extern int Pstop(struct ps_prochandle *, uint_t);
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203 extern int Pstate(struct ps_prochandle *);
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204 extern const psinfo_t *Ppsinfo(struct ps_prochandle *);
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205 extern const pstatus_t *Pstatus(struct ps_prochandle *);
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206 extern int Pcred(struct ps_prochandle *, prcred_t *, int);
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207 extern int Pgetareg(struct ps_prochandle *, int, prgreg_t *);
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208 extern int Pputareg(struct ps_prochandle *, int, prgreg_t);
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209 extern int Psetrun(struct ps_prochandle *, int, int);
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210 extern ssize_t Pread(struct ps_prochandle *, void *, size_t, uintptr_t);
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211 extern ssize_t Pread_string(struct ps_prochandle *, char *, size_t, uintptr_t);
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212 extern ssize_t Pwrite(struct ps_prochandle *, const void *, size_t, uintptr_t);
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213 extern int Pclearsig(struct ps_prochandle *);
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214 extern int Pclearfault(struct ps_prochandle *);
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215 extern int Psetbkpt(struct ps_prochandle *, uintptr_t, ulong_t *);
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216 extern int Pdelbkpt(struct ps_prochandle *, uintptr_t, ulong_t);
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217 extern int Pxecbkpt(struct ps_prochandle *, ulong_t);
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218 extern int Psetflags(struct ps_prochandle *, long);
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219 extern int Punsetflags(struct ps_prochandle *, long);
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220 extern int Psignal(struct ps_prochandle *, int, int);
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221 extern int Pfault(struct ps_prochandle *, int, int);
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222 extern int Psysentry(struct ps_prochandle *, int, int);
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223 extern int Psysexit(struct ps_prochandle *, int, int);
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224 extern void Psetsignal(struct ps_prochandle *, const sigset_t *);
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225 extern void Psetfault(struct ps_prochandle *, const fltset_t *);
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226 extern void Psetsysentry(struct ps_prochandle *, const sysset_t *);
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227 extern void Psetsysexit(struct ps_prochandle *, const sysset_t *);
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228 extern void Psync(struct ps_prochandle *);
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229 extern sysret_t Psyscall(struct ps_prochandle *, int, uint_t, argdes_t *);
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230 extern int Pisprocdir(struct ps_prochandle *, const char *);
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231
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232 /*
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233 * Function prototypes for system calls forced on the victim process.
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234 */
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235 extern int pr_open(struct ps_prochandle *, const char *, int, mode_t);
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236 extern int pr_creat(struct ps_prochandle *, const char *, mode_t);
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237 extern int pr_close(struct ps_prochandle *, int);
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238 extern int pr_door_info(struct ps_prochandle *, int, struct door_info *);
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239 extern void *pr_mmap(struct ps_prochandle *,
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240 void *, size_t, int, int, int, off_t);
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241 extern void *pr_zmap(struct ps_prochandle *,
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242 void *, size_t, int, int);
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243 extern int pr_munmap(struct ps_prochandle *, void *, size_t);
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244 extern int pr_memcntl(struct ps_prochandle *,
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245 caddr_t, size_t, int, caddr_t, int, int);
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246 extern int pr_sigaction(struct ps_prochandle *,
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247 int, const struct sigaction *, struct sigaction *);
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248 extern int pr_getitimer(struct ps_prochandle *,
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249 int, struct itimerval *);
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250 extern int pr_setitimer(struct ps_prochandle *,
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251 int, const struct itimerval *, struct itimerval *);
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252 extern int pr_ioctl(struct ps_prochandle *, int, int, void *, size_t);
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253 extern int pr_fcntl(struct ps_prochandle *, int, int, void *);
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254 extern int pr_stat(struct ps_prochandle *, const char *, struct stat *);
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255 extern int pr_lstat(struct ps_prochandle *, const char *, struct stat *);
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256 extern int pr_fstat(struct ps_prochandle *, int, struct stat *);
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257 extern int pr_statvfs(struct ps_prochandle *, const char *, statvfs_t *);
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258 extern int pr_fstatvfs(struct ps_prochandle *, int, statvfs_t *);
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259 extern int pr_getrlimit(struct ps_prochandle *,
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260 int, struct rlimit *);
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261 extern int pr_setrlimit(struct ps_prochandle *,
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262 int, const struct rlimit *);
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263 #if defined(_LARGEFILE64_SOURCE)
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264 extern int pr_getrlimit64(struct ps_prochandle *,
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265 int, struct rlimit64 *);
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266 extern int pr_setrlimit64(struct ps_prochandle *,
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267 int, const struct rlimit64 *);
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268 #endif /* _LARGEFILE64_SOURCE */
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269 extern int pr_lwp_exit(struct ps_prochandle *);
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270 extern int pr_exit(struct ps_prochandle *, int);
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271 extern int pr_waitid(struct ps_prochandle *,
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272 idtype_t, id_t, siginfo_t *, int);
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273 extern off_t pr_lseek(struct ps_prochandle *, int, off_t, int);
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274 extern offset_t pr_llseek(struct ps_prochandle *, int, offset_t, int);
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275 extern int pr_rename(struct ps_prochandle *, const char *, const char *);
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276 extern int pr_link(struct ps_prochandle *, const char *, const char *);
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277 extern int pr_unlink(struct ps_prochandle *, const char *);
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278 extern int pr_getpeername(struct ps_prochandle *,
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279 int, struct sockaddr *, socklen_t *);
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280 extern int pr_getsockname(struct ps_prochandle *,
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281 int, struct sockaddr *, socklen_t *);
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282
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283 /*
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284 * Function prototypes for accessing per-LWP register information.
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285 */
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286 extern int Plwp_getregs(struct ps_prochandle *, lwpid_t, prgregset_t);
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287 extern int Plwp_setregs(struct ps_prochandle *, lwpid_t, const prgregset_t);
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288
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289 extern int Plwp_getfpregs(struct ps_prochandle *, lwpid_t, prfpregset_t *);
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290 extern int Plwp_setfpregs(struct ps_prochandle *, lwpid_t,
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291 const prfpregset_t *);
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292
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293 #if defined(sparc) || defined(__sparc)
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294
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295 extern int Plwp_getxregs(struct ps_prochandle *, lwpid_t, prxregset_t *);
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296 extern int Plwp_setxregs(struct ps_prochandle *, lwpid_t, const prxregset_t *);
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297
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298 #if defined(__sparcv9)
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299 extern int Plwp_getasrs(struct ps_prochandle *, lwpid_t, asrset_t);
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300 extern int Plwp_setasrs(struct ps_prochandle *, lwpid_t, const asrset_t);
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301 #endif /* __sparcv9 */
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302
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303 #endif /* __sparc */
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304
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305 extern int Plwp_getpsinfo(struct ps_prochandle *, lwpid_t, lwpsinfo_t *);
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306
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307 /*
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308 * LWP iteration interface.
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309 */
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310 typedef int proc_lwp_f(void *, const lwpstatus_t *);
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311 extern int Plwp_iter(struct ps_prochandle *, proc_lwp_f *, void *);
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312
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313 /*
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314 * Symbol table interfaces.
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315 */
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316
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317 /*
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318 * Pseudo-names passed to Plookup_by_name() for well-known load objects.
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319 * NOTE: It is required that PR_OBJ_EXEC and PR_OBJ_LDSO exactly match
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320 * the definitions of PS_OBJ_EXEC and PS_OBJ_LDSO from <proc_service.h>.
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321 */
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322 #define PR_OBJ_EXEC ((const char *)0) /* search the executable file */
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323 #define PR_OBJ_LDSO ((const char *)1) /* search ld.so.1 */
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324 #define PR_OBJ_EVERY ((const char *)-1) /* search every load object */
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325
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326 /*
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327 * 'object_name' is the name of a load object obtained from an
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328 * iteration over the process's address space mappings (Pmapping_iter),
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329 * or an iteration over the process's mapped objects (Pobject_iter),
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330 * or else it is one of the special PR_OBJ_* values above.
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331 */
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332 extern int Plookup_by_name(struct ps_prochandle *,
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333 const char *, const char *, GElf_Sym *);
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334
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335 extern int Plookup_by_addr(struct ps_prochandle *,
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336 uintptr_t, char *, size_t, GElf_Sym *);
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337
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338 typedef int proc_map_f(void *, const prmap_t *, const char *);
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339
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340 extern int Pmapping_iter(struct ps_prochandle *, proc_map_f *, void *);
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341 extern int Pobject_iter(struct ps_prochandle *, proc_map_f *, void *);
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342
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343 extern const prmap_t *Paddr_to_map(struct ps_prochandle *, uintptr_t);
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344 extern const prmap_t *Paddr_to_text_map(struct ps_prochandle *, uintptr_t);
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345 extern const prmap_t *Pname_to_map(struct ps_prochandle *, const char *);
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346
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347 extern char *Pplatform(struct ps_prochandle *, char *, size_t);
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348 extern int Puname(struct ps_prochandle *, struct utsname *);
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349
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350 extern char *Pexecname(struct ps_prochandle *, char *, size_t);
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351 extern char *Pobjname(struct ps_prochandle *, uintptr_t, char *, size_t);
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352
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353 extern char *Pgetenv(struct ps_prochandle *, const char *, char *, size_t);
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354 extern long Pgetauxval(struct ps_prochandle *, int);
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355
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356 /*
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357 * Symbol table iteration interface.
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358 */
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359 typedef int proc_sym_f(void *, const GElf_Sym *, const char *);
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360
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361 extern int Psymbol_iter(struct ps_prochandle *,
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362 const char *, int, int, proc_sym_f *, void *);
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363
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364 /*
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365 * 'which' selects which symbol table and can be one of the following.
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366 */
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367 #define PR_SYMTAB 1
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368 #define PR_DYNSYM 2
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369 /*
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370 * 'type' selects the symbols of interest by binding and type. It is a bit-
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371 * mask of one or more of the following flags, whose order MUST match the
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372 * order of STB and STT constants in <sys/elf.h>.
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373 */
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374 #define BIND_LOCAL 0x0001
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375 #define BIND_GLOBAL 0x0002
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376 #define BIND_WEAK 0x0004
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377 #define BIND_ANY (BIND_LOCAL|BIND_GLOBAL|BIND_WEAK)
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378 #define TYPE_NOTYPE 0x0100
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379 #define TYPE_OBJECT 0x0200
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380 #define TYPE_FUNC 0x0400
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381 #define TYPE_SECTION 0x0800
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382 #define TYPE_FILE 0x1000
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383 #define TYPE_ANY (TYPE_NOTYPE|TYPE_OBJECT|TYPE_FUNC|TYPE_SECTION|TYPE_FILE)
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384
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385 /*
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386 * This returns the rtld_db agent handle for the process.
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387 * The handle will become invalid at the next successful exec() and
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388 * must not be used beyond that point (see Preset_maps(), below).
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389 */
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390 extern rd_agent_t *Prd_agent(struct ps_prochandle *);
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391
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392 /*
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393 * This should be called when an RD_DLACTIVITY event with the
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394 * RD_CONSISTENT state occurs via librtld_db's event mechanism.
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395 * This makes libproc's address space mappings and symbol tables current.
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396 */
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397 extern void Pupdate_maps(struct ps_prochandle *);
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398
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399 /*
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400 * This must be called after the victim process performs a successful
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401 * exec() if any of the symbol table interface functions have been called
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402 * prior to that point. This is essential because an exec() invalidates
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403 * all previous symbol table and address space mapping information.
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404 * It is always safe to call, but if it is called other than after an
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405 * exec() by the victim process it just causes unnecessary overhead.
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406 *
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407 * The rtld_db agent handle obtained from a previous call to Prd_agent() is
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408 * made invalid by Preset_maps() and Prd_agent() must be called again to get
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409 * the new handle.
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410 */
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411 extern void Preset_maps(struct ps_prochandle *);
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412
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413 /*
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414 * Given an address, Ppltdest() determines if this is part of a PLT, and if
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415 * so returns the target address of this PLT entry and a flag indicating
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416 * whether or not this PLT entry has been bound by the run-time linker.
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417 */
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418 extern uintptr_t Ppltdest(struct ps_prochandle *, uintptr_t, int *);
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419
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420 /*
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421 * Stack frame iteration interface.
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422 */
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423 typedef int proc_stack_f(void *, const prgregset_t, uint_t, const long *);
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424
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425 extern int Pstack_iter(struct ps_prochandle *,
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426 const prgregset_t, proc_stack_f *, void *);
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427
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428 /*
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429 * Compute the full pathname of a named directory without using chdir().
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430 * This is useful for dealing with /proc/<pid>/cwd.
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431 */
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432 extern char *proc_dirname(const char *, char *, size_t);
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433
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434 /*
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435 * Remove unprintable characters from psinfo.pr_psargs and replace with
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436 * whitespace characters so it is safe for printing.
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437 */
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438 extern void proc_unctrl_psinfo(psinfo_t *);
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439
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440 /*
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441 * Utility functions for processing arguments which should be /proc files,
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442 * pids, and/or core files. The returned error code can be passed to
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443 * Pgrab_error() in order to convert it to an error string.
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444 */
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445 #define PR_ARG_PIDS 0x1 /* Allow pid and /proc file arguments */
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446 #define PR_ARG_CORES 0x2 /* Allow core file arguments */
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447
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448 #define PR_ARG_ANY (PR_ARG_PIDS | PR_ARG_CORES)
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449
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450 extern struct ps_prochandle *proc_arg_grab(const char *, int, int, int *);
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451 extern pid_t proc_arg_psinfo(const char *, int, psinfo_t *, int *);
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452
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453 /*
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454 * Utility functions for obtaining information via /proc without actually
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455 * performing a Pcreate() or Pgrab():
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456 */
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457 extern int proc_get_auxv(pid_t, auxv_t *, int);
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458 extern int proc_get_cred(pid_t, prcred_t *, int);
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459 extern int proc_get_psinfo(pid_t, psinfo_t *);
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460 extern int proc_get_status(pid_t, pstatus_t *);
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461
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462 /*
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463 * Utility functions for debugging tools to convert numeric fault,
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464 * signal, and system call numbers to symbolic names:
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465 */
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466 extern char *proc_fltname(int, char *, size_t);
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467 extern char *proc_signame(int, char *, size_t);
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468 extern char *proc_sysname(int, char *, size_t);
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469
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470 #ifdef __cplusplus
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471 }
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472 #endif
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473
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474 #endif /* _LIBPROC_H */
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