| /* Internal interfaces for the GNU/Linux specific target code for gdbserver. |
| Copyright (C) 2002, 2004, 2005, 2007, 2008, 2009, 2010 |
| Free Software Foundation, Inc. |
| |
| This file is part of GDB. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| |
| #ifdef HAVE_THREAD_DB_H |
| #include <thread_db.h> |
| #endif |
| |
| #include "gdb_proc_service.h" |
| |
| #ifdef HAVE_LINUX_REGSETS |
| typedef void (*regset_fill_func) (struct regcache *, void *); |
| typedef void (*regset_store_func) (struct regcache *, const void *); |
| enum regset_type { |
| GENERAL_REGS, |
| FP_REGS, |
| EXTENDED_REGS, |
| }; |
| |
| struct regset_info |
| { |
| int get_request, set_request; |
| /* If NT_TYPE isn't 0, it will be passed to ptrace as the 3rd |
| argument and the 4th argument should be "const struct iovec *". */ |
| int nt_type; |
| int size; |
| enum regset_type type; |
| regset_fill_func fill_function; |
| regset_store_func store_function; |
| }; |
| extern struct regset_info target_regsets[]; |
| #endif |
| |
| struct siginfo; |
| |
| struct process_info_private |
| { |
| /* Arch-specific additions. */ |
| struct arch_process_info *arch_private; |
| |
| /* libthread_db-specific additions. Not NULL if this process has loaded |
| thread_db, and it is active. */ |
| struct thread_db *thread_db; |
| }; |
| |
| struct lwp_info; |
| |
| struct linux_target_ops |
| { |
| /* Architecture-specific setup. */ |
| void (*arch_setup) (void); |
| |
| int num_regs; |
| int *regmap; |
| int (*cannot_fetch_register) (int); |
| |
| /* Returns 0 if we can store the register, 1 if we can not |
| store the register, and 2 if failure to store the register |
| is acceptable. */ |
| int (*cannot_store_register) (int); |
| CORE_ADDR (*get_pc) (struct regcache *regcache); |
| void (*set_pc) (struct regcache *regcache, CORE_ADDR newpc); |
| const unsigned char *breakpoint; |
| int breakpoint_len; |
| CORE_ADDR (*breakpoint_reinsert_addr) (void); |
| |
| int decr_pc_after_break; |
| int (*breakpoint_at) (CORE_ADDR pc); |
| |
| /* Breakpoint and watchpoint related functions. See target.h for |
| comments. */ |
| int (*insert_point) (char type, CORE_ADDR addr, int len); |
| int (*remove_point) (char type, CORE_ADDR addr, int len); |
| int (*stopped_by_watchpoint) (void); |
| CORE_ADDR (*stopped_data_address) (void); |
| |
| /* Hooks to reformat register data for PEEKUSR/POKEUSR (in particular |
| for registers smaller than an xfer unit). */ |
| void (*collect_ptrace_register) (struct regcache *regcache, |
| int regno, char *buf); |
| void (*supply_ptrace_register) (struct regcache *regcache, |
| int regno, const char *buf); |
| |
| /* Hook to convert from target format to ptrace format and back. |
| Returns true if any conversion was done; false otherwise. |
| If DIRECTION is 1, then copy from INF to NATIVE. |
| If DIRECTION is 0, copy from NATIVE to INF. */ |
| int (*siginfo_fixup) (struct siginfo *native, void *inf, int direction); |
| |
| /* Hook to call when a new process is created or attached to. |
| If extra per-process architecture-specific data is needed, |
| allocate it here. */ |
| struct arch_process_info * (*new_process) (void); |
| |
| /* Hook to call when a new thread is detected. |
| If extra per-thread architecture-specific data is needed, |
| allocate it here. */ |
| struct arch_lwp_info * (*new_thread) (void); |
| |
| /* Hook to call prior to resuming a thread. */ |
| void (*prepare_to_resume) (struct lwp_info *); |
| |
| /* Hook to support target specific qSupported. */ |
| void (*process_qsupported) (const char *); |
| |
| /* Returns true if the low target supports tracepoints. */ |
| int (*supports_tracepoints) (void); |
| |
| /* Fill ADDRP with the thread area address of LWPID. Returns 0 on |
| success, -1 on failure. */ |
| int (*get_thread_area) (int lwpid, CORE_ADDR *addrp); |
| |
| /* Install a fast tracepoint jump pad. See target.h for |
| comments. */ |
| int (*install_fast_tracepoint_jump_pad) (CORE_ADDR tpoint, CORE_ADDR tpaddr, |
| CORE_ADDR collector, |
| CORE_ADDR lockaddr, |
| ULONGEST orig_size, |
| CORE_ADDR *jump_entry, |
| unsigned char *jjump_pad_insn, |
| ULONGEST *jjump_pad_insn_size, |
| CORE_ADDR *adjusted_insn_addr, |
| CORE_ADDR *adjusted_insn_addr_end); |
| |
| /* Return the bytecode operations vector for the current inferior. |
| Returns NULL if bytecode compilation is not supported. */ |
| struct emit_ops *(*emit_ops) (void); |
| }; |
| |
| extern struct linux_target_ops the_low_target; |
| |
| #define ptid_of(proc) ((proc)->head.id) |
| #define pid_of(proc) ptid_get_pid ((proc)->head.id) |
| #define lwpid_of(proc) ptid_get_lwp ((proc)->head.id) |
| |
| #define get_lwp(inf) ((struct lwp_info *)(inf)) |
| #define get_thread_lwp(thr) (get_lwp (inferior_target_data (thr))) |
| #define get_lwp_thread(proc) ((struct thread_info *) \ |
| find_inferior_id (&all_threads, \ |
| get_lwp (proc)->head.id)) |
| |
| struct lwp_info |
| { |
| struct inferior_list_entry head; |
| |
| /* If this flag is set, the next SIGSTOP will be ignored (the |
| process will be immediately resumed). This means that either we |
| sent the SIGSTOP to it ourselves and got some other pending event |
| (so the SIGSTOP is still pending), or that we stopped the |
| inferior implicitly via PTRACE_ATTACH and have not waited for it |
| yet. */ |
| int stop_expected; |
| |
| /* When this is true, we shall not try to resume this thread, even |
| if last_resume_kind isn't resume_stop. */ |
| int suspended; |
| |
| /* If this flag is set, the lwp is known to be stopped right now (stop |
| event already received in a wait()). */ |
| int stopped; |
| |
| /* If this flag is set, the lwp is known to be dead already (exit |
| event already received in a wait(), and is cached in |
| status_pending). */ |
| int dead; |
| |
| /* When stopped is set, the last wait status recorded for this lwp. */ |
| int last_status; |
| |
| /* When stopped is set, this is where the lwp stopped, with |
| decr_pc_after_break already accounted for. */ |
| CORE_ADDR stop_pc; |
| |
| /* If this flag is set, STATUS_PENDING is a waitstatus that has not yet |
| been reported. */ |
| int status_pending_p; |
| int status_pending; |
| |
| /* STOPPED_BY_WATCHPOINT is non-zero if this LWP stopped with a data |
| watchpoint trap. */ |
| int stopped_by_watchpoint; |
| |
| /* On architectures where it is possible to know the data address of |
| a triggered watchpoint, STOPPED_DATA_ADDRESS is non-zero, and |
| contains such data address. Only valid if STOPPED_BY_WATCHPOINT |
| is true. */ |
| CORE_ADDR stopped_data_address; |
| |
| /* If this is non-zero, it is a breakpoint to be reinserted at our next |
| stop (SIGTRAP stops only). */ |
| CORE_ADDR bp_reinsert; |
| |
| /* If this flag is set, the last continue operation at the ptrace |
| level on this process was a single-step. */ |
| int stepping; |
| |
| /* If this flag is set, we need to set the event request flags the |
| next time we see this LWP stop. */ |
| int must_set_ptrace_flags; |
| |
| /* If this is non-zero, it points to a chain of signals which need to |
| be delivered to this process. */ |
| struct pending_signals *pending_signals; |
| |
| /* A link used when resuming. It is initialized from the resume request, |
| and then processed and cleared in linux_resume_one_lwp. */ |
| struct thread_resume *resume; |
| |
| /* True if it is known that this lwp is presently collecting a fast |
| tracepoint (it is in the jump pad or in some code that will |
| return to the jump pad. Normally, we won't care about this, but |
| we will if a signal arrives to this lwp while it is |
| collecting. */ |
| int collecting_fast_tracepoint; |
| |
| /* If this is non-zero, it points to a chain of signals which need |
| to be reported to GDB. These were deferred because the thread |
| was doing a fast tracepoint collect when they arrived. */ |
| struct pending_signals *pending_signals_to_report; |
| |
| /* When collecting_fast_tracepoint is first found to be 1, we insert |
| a exit-jump-pad-quickly breakpoint. This is it. */ |
| struct breakpoint *exit_jump_pad_bkpt; |
| |
| /* True if the LWP was seen stop at an internal breakpoint and needs |
| stepping over later when it is resumed. */ |
| int need_step_over; |
| |
| int thread_known; |
| #ifdef HAVE_THREAD_DB_H |
| /* The thread handle, used for e.g. TLS access. Only valid if |
| THREAD_KNOWN is set. */ |
| td_thrhandle_t th; |
| #endif |
| |
| /* Arch-specific additions. */ |
| struct arch_lwp_info *arch_private; |
| }; |
| |
| extern struct inferior_list all_lwps; |
| |
| char *linux_child_pid_to_exec_file (int pid); |
| int elf_64_file_p (const char *file); |
| |
| void linux_attach_lwp (unsigned long pid); |
| struct lwp_info *find_lwp_pid (ptid_t ptid); |
| void linux_stop_lwp (struct lwp_info *lwp); |
| |
| /* From thread-db.c */ |
| int thread_db_init (int use_events); |
| void thread_db_detach (struct process_info *); |
| void thread_db_mourn (struct process_info *); |
| int thread_db_handle_monitor_command (char *); |
| int thread_db_get_tls_address (struct thread_info *thread, CORE_ADDR offset, |
| CORE_ADDR load_module, CORE_ADDR *address); |
| int thread_db_look_up_one_symbol (const char *name, CORE_ADDR *addrp); |