| 1 | /* Internal interfaces for the GNU/Linux specific target code for gdbserver. |
| 2 | Copyright (C) 2002, 2004, 2005, 2007, 2008, 2009, 2010 |
| 3 | Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GDB. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 3 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | #ifdef HAVE_THREAD_DB_H |
| 21 | #include <thread_db.h> |
| 22 | #endif |
| 23 | |
| 24 | #include "gdb_proc_service.h" |
| 25 | |
| 26 | #ifdef HAVE_LINUX_REGSETS |
| 27 | typedef void (*regset_fill_func) (struct regcache *, void *); |
| 28 | typedef void (*regset_store_func) (struct regcache *, const void *); |
| 29 | enum regset_type { |
| 30 | GENERAL_REGS, |
| 31 | FP_REGS, |
| 32 | EXTENDED_REGS, |
| 33 | }; |
| 34 | |
| 35 | struct regset_info |
| 36 | { |
| 37 | int get_request, set_request; |
| 38 | int size; |
| 39 | enum regset_type type; |
| 40 | regset_fill_func fill_function; |
| 41 | regset_store_func store_function; |
| 42 | }; |
| 43 | extern struct regset_info target_regsets[]; |
| 44 | #endif |
| 45 | |
| 46 | struct siginfo; |
| 47 | |
| 48 | struct process_info_private |
| 49 | { |
| 50 | /* Arch-specific additions. */ |
| 51 | struct arch_process_info *arch_private; |
| 52 | |
| 53 | /* libthread_db-specific additions. Not NULL if this process has loaded |
| 54 | thread_db, and it is active. */ |
| 55 | struct thread_db *thread_db; |
| 56 | }; |
| 57 | |
| 58 | struct lwp_info; |
| 59 | |
| 60 | struct linux_target_ops |
| 61 | { |
| 62 | /* Architecture-specific setup. */ |
| 63 | void (*arch_setup) (void); |
| 64 | |
| 65 | int num_regs; |
| 66 | int *regmap; |
| 67 | int (*cannot_fetch_register) (int); |
| 68 | |
| 69 | /* Returns 0 if we can store the register, 1 if we can not |
| 70 | store the register, and 2 if failure to store the register |
| 71 | is acceptable. */ |
| 72 | int (*cannot_store_register) (int); |
| 73 | CORE_ADDR (*get_pc) (struct regcache *regcache); |
| 74 | void (*set_pc) (struct regcache *regcache, CORE_ADDR newpc); |
| 75 | const unsigned char *breakpoint; |
| 76 | int breakpoint_len; |
| 77 | CORE_ADDR (*breakpoint_reinsert_addr) (void); |
| 78 | |
| 79 | int decr_pc_after_break; |
| 80 | int (*breakpoint_at) (CORE_ADDR pc); |
| 81 | |
| 82 | /* Breakpoint and watchpoint related functions. See target.h for |
| 83 | comments. */ |
| 84 | int (*insert_point) (char type, CORE_ADDR addr, int len); |
| 85 | int (*remove_point) (char type, CORE_ADDR addr, int len); |
| 86 | int (*stopped_by_watchpoint) (void); |
| 87 | CORE_ADDR (*stopped_data_address) (void); |
| 88 | |
| 89 | /* Hooks to reformat register data for PEEKUSR/POKEUSR (in particular |
| 90 | for registers smaller than an xfer unit). */ |
| 91 | void (*collect_ptrace_register) (struct regcache *regcache, |
| 92 | int regno, char *buf); |
| 93 | void (*supply_ptrace_register) (struct regcache *regcache, |
| 94 | int regno, const char *buf); |
| 95 | |
| 96 | /* Hook to convert from target format to ptrace format and back. |
| 97 | Returns true if any conversion was done; false otherwise. |
| 98 | If DIRECTION is 1, then copy from INF to NATIVE. |
| 99 | If DIRECTION is 0, copy from NATIVE to INF. */ |
| 100 | int (*siginfo_fixup) (struct siginfo *native, void *inf, int direction); |
| 101 | |
| 102 | /* Hook to call when a new process is created or attached to. |
| 103 | If extra per-process architecture-specific data is needed, |
| 104 | allocate it here. */ |
| 105 | struct arch_process_info * (*new_process) (void); |
| 106 | |
| 107 | /* Hook to call when a new thread is detected. |
| 108 | If extra per-thread architecture-specific data is needed, |
| 109 | allocate it here. */ |
| 110 | struct arch_lwp_info * (*new_thread) (void); |
| 111 | |
| 112 | /* Hook to call prior to resuming a thread. */ |
| 113 | void (*prepare_to_resume) (struct lwp_info *); |
| 114 | }; |
| 115 | |
| 116 | extern struct linux_target_ops the_low_target; |
| 117 | |
| 118 | #define ptid_of(proc) ((proc)->head.id) |
| 119 | #define pid_of(proc) ptid_get_pid ((proc)->head.id) |
| 120 | #define lwpid_of(proc) ptid_get_lwp ((proc)->head.id) |
| 121 | |
| 122 | #define get_lwp(inf) ((struct lwp_info *)(inf)) |
| 123 | #define get_thread_lwp(thr) (get_lwp (inferior_target_data (thr))) |
| 124 | #define get_lwp_thread(proc) ((struct thread_info *) \ |
| 125 | find_inferior_id (&all_threads, \ |
| 126 | get_lwp (proc)->head.id)) |
| 127 | |
| 128 | struct lwp_info |
| 129 | { |
| 130 | struct inferior_list_entry head; |
| 131 | |
| 132 | /* If this flag is set, the next SIGSTOP will be ignored (the |
| 133 | process will be immediately resumed). This means that either we |
| 134 | sent the SIGSTOP to it ourselves and got some other pending event |
| 135 | (so the SIGSTOP is still pending), or that we stopped the |
| 136 | inferior implicitly via PTRACE_ATTACH and have not waited for it |
| 137 | yet. */ |
| 138 | int stop_expected; |
| 139 | |
| 140 | /* When this is true, we shall not try to resume this thread, even |
| 141 | if last_resume_kind isn't resume_stop. */ |
| 142 | int suspended; |
| 143 | |
| 144 | /* If this flag is set, the lwp is known to be stopped right now (stop |
| 145 | event already received in a wait()). */ |
| 146 | int stopped; |
| 147 | |
| 148 | /* If this flag is set, the lwp is known to be dead already (exit |
| 149 | event already received in a wait(), and is cached in |
| 150 | status_pending). */ |
| 151 | int dead; |
| 152 | |
| 153 | /* When stopped is set, the last wait status recorded for this lwp. */ |
| 154 | int last_status; |
| 155 | |
| 156 | /* When stopped is set, this is where the lwp stopped, with |
| 157 | decr_pc_after_break already accounted for. */ |
| 158 | CORE_ADDR stop_pc; |
| 159 | |
| 160 | /* If this flag is set, STATUS_PENDING is a waitstatus that has not yet |
| 161 | been reported. */ |
| 162 | int status_pending_p; |
| 163 | int status_pending; |
| 164 | |
| 165 | /* STOPPED_BY_WATCHPOINT is non-zero if this LWP stopped with a data |
| 166 | watchpoint trap. */ |
| 167 | int stopped_by_watchpoint; |
| 168 | |
| 169 | /* On architectures where it is possible to know the data address of |
| 170 | a triggered watchpoint, STOPPED_DATA_ADDRESS is non-zero, and |
| 171 | contains such data address. Only valid if STOPPED_BY_WATCHPOINT |
| 172 | is true. */ |
| 173 | CORE_ADDR stopped_data_address; |
| 174 | |
| 175 | /* If this is non-zero, it is a breakpoint to be reinserted at our next |
| 176 | stop (SIGTRAP stops only). */ |
| 177 | CORE_ADDR bp_reinsert; |
| 178 | |
| 179 | /* If this flag is set, the last continue operation at the ptrace |
| 180 | level on this process was a single-step. */ |
| 181 | int stepping; |
| 182 | |
| 183 | /* If this flag is set, we need to set the event request flags the |
| 184 | next time we see this LWP stop. */ |
| 185 | int must_set_ptrace_flags; |
| 186 | |
| 187 | /* If this is non-zero, it points to a chain of signals which need to |
| 188 | be delivered to this process. */ |
| 189 | struct pending_signals *pending_signals; |
| 190 | |
| 191 | /* A link used when resuming. It is initialized from the resume request, |
| 192 | and then processed and cleared in linux_resume_one_lwp. */ |
| 193 | struct thread_resume *resume; |
| 194 | |
| 195 | /* The last resume GDB requested on this thread. */ |
| 196 | enum resume_kind last_resume_kind; |
| 197 | |
| 198 | /* True if the LWP was seen stop at an internal breakpoint and needs |
| 199 | stepping over later when it is resumed. */ |
| 200 | int need_step_over; |
| 201 | |
| 202 | int thread_known; |
| 203 | #ifdef HAVE_THREAD_DB_H |
| 204 | /* The thread handle, used for e.g. TLS access. Only valid if |
| 205 | THREAD_KNOWN is set. */ |
| 206 | td_thrhandle_t th; |
| 207 | #endif |
| 208 | |
| 209 | /* Arch-specific additions. */ |
| 210 | struct arch_lwp_info *arch_private; |
| 211 | }; |
| 212 | |
| 213 | extern struct inferior_list all_lwps; |
| 214 | |
| 215 | char *linux_child_pid_to_exec_file (int pid); |
| 216 | int elf_64_file_p (const char *file); |
| 217 | |
| 218 | void linux_attach_lwp (unsigned long pid); |
| 219 | struct lwp_info *find_lwp_pid (ptid_t ptid); |
| 220 | |
| 221 | /* From thread-db.c */ |
| 222 | int thread_db_init (int use_events); |
| 223 | void thread_db_free (struct process_info *, int detaching); |
| 224 | int thread_db_handle_monitor_command (char *); |
| 225 | int thread_db_get_tls_address (struct thread_info *thread, CORE_ADDR offset, |
| 226 | CORE_ADDR load_module, CORE_ADDR *address); |