gdbsupport/gdb_proc_service.h

   1 /* <proc_service.h> replacement for systems that don't have it.
   2    Copyright (C) 2000-2020 Free Software Foundation, Inc.
   3
   4    This file is part of GDB.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  18
  19 #ifndef COMMON_GDB_PROC_SERVICE_H
  20 #define COMMON_GDB_PROC_SERVICE_H
  21
  22 #include <sys/types.h>
  23
  24 #ifdef HAVE_PROC_SERVICE_H
  25
  26 /* glibc's proc_service.h doesn't wrap itself with extern "C".  Need
  27    to do it ourselves.  */
  28 EXTERN_C_PUSH
  29
  30 #include <proc_service.h>
  31
  32 EXTERN_C_POP
  33
  34 #else /* HAVE_PROC_SERVICE_H */
  35
  36 /* The following fallback definitions have been imported and adjusted
  37    from glibc's proc_service.h  */
  38
  39 /* Callback interface for libthread_db, functions users must define.
  40    Copyright (C) 1999,2002,2003 Free Software Foundation, Inc.
  41    This file is part of the GNU C Library.
  42
  43    The GNU C Library is free software; you can redistribute it and/or
  44    modify it under the terms of the GNU Lesser General Public
  45    License as published by the Free Software Foundation; either
  46    version 2.1 of the License, or (at your option) any later version.
  47
  48    The GNU C Library is distributed in the hope that it will be useful,
  49    but WITHOUT ANY WARRANTY; without even the implied warranty of
  50    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  51    Lesser General Public License for more details.
  52
  53    You should have received a copy of the GNU Lesser General Public
  54    License along with the GNU C Library; if not, see
  55    <http://www.gnu.org/licenses/>.  */
  56
  57 /* The definitions in this file must correspond to those in the debugger.  */
  58
  59 #ifdef HAVE_SYS_PROCFS_H
  60 #include <sys/procfs.h>
  61 #endif
  62
  63 /* Not all platforms bring in <linux/elf.h> via <sys/procfs.h>.  If
  64    <sys/procfs.h> wasn't enough to find elf_fpregset_t, try the kernel
  65    headers also (but don't if we don't need to).  */
  66 #ifndef HAVE_ELF_FPREGSET_T
  67 # ifdef HAVE_LINUX_ELF_H
  68 #  include <linux/elf.h>
  69 # endif
  70 #endif
  71
  72 EXTERN_C_PUSH
  73
  74 /* Functions in this interface return one of these status codes.  */
  75 typedef enum
  76 {
  77   PS_OK,                /* Generic "call succeeded".  */
  78   PS_ERR,               /* Generic error.  */
  79   PS_BADPID,            /* Bad process handle.  */
  80   PS_BADLID,            /* Bad LWP identifier.  */
  81   PS_BADADDR,           /* Bad address.  */
  82   PS_NOSYM,             /* Could not find given symbol.  */
  83   PS_NOFREGS            /* FPU register set not available for given LWP.  */
  84 } ps_err_e;
  85
  86 #ifndef HAVE_LWPID_T
  87 typedef unsigned int lwpid_t;
  88 #endif
  89
  90 #ifndef HAVE_PSADDR_T
  91 typedef void *psaddr_t;
  92 #endif
  93
  94 #ifndef HAVE_PRGREGSET_T
  95 typedef elf_gregset_t prgregset_t;
  96 #endif
  97
  98 #ifndef HAVE_PRFPREGSET_T
  99 typedef elf_fpregset_t prfpregset_t;
 100 #endif
 101
 102 /* This type is opaque in this interface.  It's defined by the user of
 103    libthread_db.  GDB's version is defined below.  */
 104 struct ps_prochandle;
 105
 106
 107 /* Read or write process memory at the given address.  */
 108 extern ps_err_e ps_pdread (struct ps_prochandle *,
 109                            psaddr_t, void *, size_t);
 110 extern ps_err_e ps_pdwrite (struct ps_prochandle *,
 111                             psaddr_t, const void *, size_t);
 112 extern ps_err_e ps_ptread (struct ps_prochandle *,
 113                            psaddr_t, void *, size_t);
 114 extern ps_err_e ps_ptwrite (struct ps_prochandle *,
 115                             psaddr_t, const void *, size_t);
 116
 117
 118 /* Get and set the given LWP's general or FPU register set.  */
 119 extern ps_err_e ps_lgetregs (struct ps_prochandle *,
 120                              lwpid_t, prgregset_t);
 121 extern ps_err_e ps_lsetregs (struct ps_prochandle *,
 122                              lwpid_t, const prgregset_t);
 123 extern ps_err_e ps_lgetfpregs (struct ps_prochandle *,
 124                                lwpid_t, prfpregset_t *);
 125 extern ps_err_e ps_lsetfpregs (struct ps_prochandle *,
 126                                lwpid_t, const prfpregset_t *);
 127
 128 /* Return the PID of the process.  */
 129 extern pid_t ps_getpid (struct ps_prochandle *);
 130
 131 /* Fetch the special per-thread address associated with the given LWP.
 132    This call is only used on a few platforms (most use a normal register).
 133    The meaning of the `int' parameter is machine-dependent.  */
 134 extern ps_err_e ps_get_thread_area (struct ps_prochandle *,
 135                                     lwpid_t, int, psaddr_t *);
 136
 137
 138 /* Look up the named symbol in the named DSO in the symbol tables
 139    associated with the process being debugged, filling in *SYM_ADDR
 140    with the corresponding run-time address.  */
 141 extern ps_err_e ps_pglobal_lookup (struct ps_prochandle *,
 142                                    const char *object_name,
 143                                    const char *sym_name,
 144                                    psaddr_t *sym_addr);
 145
 146
 147 /* Stop or continue the entire process.  */
 148 extern ps_err_e ps_pstop (struct ps_prochandle *);
 149 extern ps_err_e ps_pcontinue (struct ps_prochandle *);
 150
 151 /* Stop or continue the given LWP alone.  */
 152 extern ps_err_e ps_lstop (struct ps_prochandle *, lwpid_t);
 153 extern ps_err_e ps_lcontinue (struct ps_prochandle *, lwpid_t);
 154
 155 /* The following are only defined in/called by Solaris.  */
 156
 157 /* Get size of extra register set.  */
 158 extern ps_err_e ps_lgetxregsize (struct ps_prochandle *ph,
 159                                  lwpid_t lwpid, int *xregsize);
 160 /* Get extra register set.  */
 161 extern ps_err_e ps_lgetxregs (struct ps_prochandle *ph, lwpid_t lwpid,
 162                               caddr_t xregset);
 163 extern ps_err_e ps_lsetxregs (struct ps_prochandle *ph, lwpid_t lwpid,
 164                               caddr_t xregset);
 165
 166 /* Log a message (sends to gdb_stderr).  */
 167 extern void ps_plog (const char *fmt, ...);
 168
 169 EXTERN_C_POP
 170
 171 #endif /* HAVE_PROC_SERVICE_H */
 172
 173 /* Make sure we export the needed symbols, in case GDB is built with
 174    -fvisibility=hidden.  */
 175
 176 #define PS_EXPORT(SYM)                                          \
 177   __attribute__((visibility ("default"))) typeof (SYM) SYM
 178
 179 PS_EXPORT (ps_get_thread_area);
 180 PS_EXPORT (ps_getpid);
 181 PS_EXPORT (ps_lcontinue);
 182 PS_EXPORT (ps_lgetfpregs);
 183 PS_EXPORT (ps_lgetregs);
 184 PS_EXPORT (ps_lsetfpregs);
 185 PS_EXPORT (ps_lsetregs);
 186 PS_EXPORT (ps_lstop);
 187 PS_EXPORT (ps_pcontinue);
 188 PS_EXPORT (ps_pdread);
 189 PS_EXPORT (ps_pdwrite);
 190 PS_EXPORT (ps_pglobal_lookup);
 191 PS_EXPORT (ps_pstop);
 192 PS_EXPORT (ps_ptread);
 193 PS_EXPORT (ps_ptwrite);
 194
 195 #ifdef __sun__
 196 PS_EXPORT (ps_lgetxregs);
 197 PS_EXPORT (ps_lgetxregsize);
 198 PS_EXPORT (ps_lsetxregs);
 199 PS_EXPORT (ps_plog);
 200 #endif
 201
 202 #endif /* COMMON_GDB_PROC_SERVICE_H */