X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=gdb%2Fgdbserver%2Ftarget.h;h=be8925802fe333abce36503387fa326bf7602310;hb=4ec192e6abe86319b9e9af6f2ae4cf0614b1e2b3;hp=fbe191086d6ce06c374c1de9538f38b2d4110e54;hpb=711e434b390a0b953862435eb81f3b89e720b030;p=deliverable%2Fbinutils-gdb.git diff --git a/gdb/gdbserver/target.h b/gdb/gdbserver/target.h index fbe191086d..be8925802f 100644 --- a/gdb/gdbserver/target.h +++ b/gdb/gdbserver/target.h @@ -1,6 +1,5 @@ /* Target operations for the remote server for GDB. - Copyright (C) 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010 - Free Software Foundation, Inc. + Copyright (C) 2002-2017 Free Software Foundation, Inc. Contributed by MontaVista Software. @@ -22,19 +21,18 @@ #ifndef TARGET_H #define TARGET_H -/* Ways to "resume" a thread. */ +#include /* for mode_t */ +#include "target/target.h" +#include "target/resume.h" +#include "target/wait.h" +#include "target/waitstatus.h" +#include "mem-break.h" +#include "btrace-common.h" +#include -enum resume_kind -{ - /* Thread should continue. */ - resume_continue, - - /* Thread should single-step. */ - resume_step, - - /* Thread should be stopped. */ - resume_stop -}; +struct emit_ops; +struct buffer; +struct process_info; /* This structure describes how to resume a particular thread (or all threads) based on the client's request. If thread is -1, then this @@ -51,73 +49,36 @@ struct thread_resume /* If non-zero, send this signal when we resume, or to stop the thread. If stopping a thread, and this is 0, the target should stop the thread however it best decides to (e.g., SIGSTOP on - linux; SuspendThread on win32). */ + linux; SuspendThread on win32). This is a host signal value (not + enum gdb_signal). */ int sig; -}; -/* Generally, what has the program done? */ -enum target_waitkind - { - /* The program has exited. The exit status is in - value.integer. */ - TARGET_WAITKIND_EXITED, - - /* The program has stopped with a signal. Which signal is in - value.sig. */ - TARGET_WAITKIND_STOPPED, - - /* The program has terminated with a signal. Which signal is in - value.sig. */ - TARGET_WAITKIND_SIGNALLED, - - /* The program is letting us know that it dynamically loaded - something. */ - TARGET_WAITKIND_LOADED, - - /* The program has exec'ed a new executable file. The new file's - pathname is pointed to by value.execd_pathname. */ - TARGET_WAITKIND_EXECD, - - /* Nothing of interest to GDB happened, but we stopped anyway. */ - TARGET_WAITKIND_SPURIOUS, - - /* An event has occurred, but we should wait again. In this case, - we want to go back to the event loop and wait there for another - event from the inferior. */ - TARGET_WAITKIND_IGNORE - }; - -struct target_waitstatus - { - enum target_waitkind kind; - - /* Forked child pid, execd pathname, exit status or signal number. */ - union - { - int integer; - enum target_signal sig; - ptid_t related_pid; - char *execd_pathname; - } - value; - }; - -/* Options that can be passed to target_ops->wait. */ - -#define TARGET_WNOHANG 1 + /* Range to single step within. Valid only iff KIND is resume_step. + + Single-step once, and then continuing stepping as long as the + thread stops in this range. (If the range is empty + [STEP_RANGE_START == STEP_RANGE_END], then this is a single-step + request.) */ + CORE_ADDR step_range_start; /* Inclusive */ + CORE_ADDR step_range_end; /* Exclusive */ +}; struct target_ops { /* Start a new process. PROGRAM is a path to the program to execute. - ARGS is a standard NULL-terminated array of arguments, - to be passed to the inferior as ``argv''. + PROGRAM_ARGS is a standard NULL-terminated array of arguments, + to be passed to the inferior as ``argv'' (along with PROGRAM). Returns the new PID on success, -1 on failure. Registers the new process with the process list. */ + int (*create_inferior) (const char *program, + const std::vector &program_args); - int (*create_inferior) (char *program, char **args); + /* Do additional setup after a new process is created, including + exec-wrapper completion. */ + void (*post_create_inferior) (void); /* Attach to a running process. @@ -178,6 +139,23 @@ struct target_ops void (*store_registers) (struct regcache *regcache, int regno); + /* Prepare to read or write memory from the inferior process. + Targets use this to do what is necessary to get the state of the + inferior such that it is possible to access memory. + + This should generally only be called from client facing routines, + such as gdb_read_memory/gdb_write_memory, or the GDB breakpoint + insertion routine. + + Like `read_memory' and `write_memory' below, returns 0 on success + and errno on failure. */ + + int (*prepare_to_access_memory) (void); + + /* Undo the effects of prepare_to_access_memory. */ + + void (*done_accessing_memory) (void); + /* Read memory from the inferior process. This should generally be called through read_inferior_memory, which handles breakpoint shadowing. @@ -217,17 +195,41 @@ struct target_ops int (*read_auxv) (CORE_ADDR offset, unsigned char *myaddr, unsigned int len); - /* Insert and remove a break or watchpoint. - Returns 0 on success, -1 on failure and 1 on unsupported. - The type is coded as follows: + /* Returns true if GDB Z breakpoint type TYPE is supported, false + otherwise. The type is coded as follows: '0' - software-breakpoint '1' - hardware-breakpoint '2' - write watchpoint '3' - read watchpoint - '4' - access watchpoint */ + '4' - access watchpoint + */ + int (*supports_z_point_type) (char z_type); - int (*insert_point) (char type, CORE_ADDR addr, int len); - int (*remove_point) (char type, CORE_ADDR addr, int len); + /* Insert and remove a break or watchpoint. + Returns 0 on success, -1 on failure and 1 on unsupported. */ + + int (*insert_point) (enum raw_bkpt_type type, CORE_ADDR addr, + int size, struct raw_breakpoint *bp); + int (*remove_point) (enum raw_bkpt_type type, CORE_ADDR addr, + int size, struct raw_breakpoint *bp); + + /* Returns 1 if the target stopped because it executed a software + breakpoint instruction, 0 otherwise. */ + int (*stopped_by_sw_breakpoint) (void); + + /* Returns true if the target knows whether a trap was caused by a + SW breakpoint triggering. */ + int (*supports_stopped_by_sw_breakpoint) (void); + + /* Returns 1 if the target stopped for a hardware breakpoint. */ + int (*stopped_by_hw_breakpoint) (void); + + /* Returns true if the target knows whether a trap was caused by a + HW breakpoint triggering. */ + int (*supports_stopped_by_hw_breakpoint) (void); + + /* Returns true if the target can do hardware single step. */ + int (*supports_hardware_single_step) (void); /* Returns 1 if target was stopped due to a watchpoint hit, 0 otherwise. */ @@ -284,6 +286,18 @@ struct target_ops /* Returns true if the target supports multi-process debugging. */ int (*supports_multi_process) (void); + /* Returns true if fork events are supported. */ + int (*supports_fork_events) (void); + + /* Returns true if vfork events are supported. */ + int (*supports_vfork_events) (void); + + /* Returns true if exec events are supported. */ + int (*supports_exec_events) (void); + + /* Allows target to re-initialize connection-specific settings. */ + void (*handle_new_gdb_connection) (void); + /* If not NULL, target-specific routine to process monitor command. Returns 1 if handled, or 0 to perform default processing. */ int (*handle_monitor_command) (char *); @@ -291,8 +305,13 @@ struct target_ops /* Returns the core given a thread, or -1 if not known. */ int (*core_of_thread) (ptid_t); - /* Target specific qSupported support. */ - void (*process_qsupported) (const char *); + /* Read loadmaps. Read LEN bytes at OFFSET into a buffer at MYADDR. */ + int (*read_loadmap) (const char *annex, CORE_ADDR offset, + unsigned char *myaddr, unsigned int len); + + /* Target specific qSupported support. FEATURES is an array of + features with COUNT elements. */ + void (*process_qsupported) (char **features, int count); /* Return 1 if the target supports tracepoints, 0 (or leave the callback NULL) otherwise. */ @@ -307,32 +326,198 @@ struct target_ops /* Return true if THREAD is known to be stopped now. */ int (*thread_stopped) (struct thread_info *thread); - /* Pause all threads. */ - void (*pause_all) (void); - /* Read Thread Information Block address. */ int (*get_tib_address) (ptid_t ptid, CORE_ADDR *address); + + /* Pause all threads. If FREEZE, arrange for any resume attempt to + be ignored until an unpause_all call unfreezes threads again. + There can be nested calls to pause_all, so a freeze counter + should be maintained. */ + void (*pause_all) (int freeze); + + /* Unpause all threads. Threads that hadn't been resumed by the + client should be left stopped. Basically a pause/unpause call + pair should not end up resuming threads that were stopped before + the pause call. */ + void (*unpause_all) (int unfreeze); + + /* Stabilize all threads. That is, force them out of jump pads. */ + void (*stabilize_threads) (void); + + /* Install a fast tracepoint jump pad. TPOINT is the address of the + tracepoint internal object as used by the IPA agent. TPADDR is + the address of tracepoint. COLLECTOR is address of the function + the jump pad redirects to. LOCKADDR is the address of the jump + pad lock object. ORIG_SIZE is the size in bytes of the + instruction at TPADDR. JUMP_ENTRY points to the address of the + jump pad entry, and on return holds the address past the end of + the created jump pad. If a trampoline is created by the function, + then TRAMPOLINE and TRAMPOLINE_SIZE return the address and size of + the trampoline, else they remain unchanged. JJUMP_PAD_INSN is a + buffer containing a copy of the instruction at TPADDR. + ADJUST_INSN_ADDR and ADJUST_INSN_ADDR_END are output parameters that + return the address range where the instruction at TPADDR was relocated + to. If an error occurs, the ERR may be used to pass on an error + message. */ + 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, + CORE_ADDR *trampoline, + ULONGEST *trampoline_size, + unsigned char *jjump_pad_insn, + ULONGEST *jjump_pad_insn_size, + CORE_ADDR *adjusted_insn_addr, + CORE_ADDR *adjusted_insn_addr_end, + char *err); + + /* Return the bytecode operations vector for the current inferior. + Returns NULL if bytecode compilation is not supported. */ + struct emit_ops *(*emit_ops) (void); + + /* Returns true if the target supports disabling randomization. */ + int (*supports_disable_randomization) (void); + + /* Return the minimum length of an instruction that can be safely overwritten + for use as a fast tracepoint. */ + int (*get_min_fast_tracepoint_insn_len) (void); + + /* Read solib info on SVR4 platforms. */ + int (*qxfer_libraries_svr4) (const char *annex, unsigned char *readbuf, + unsigned const char *writebuf, + CORE_ADDR offset, int len); + + /* Return true if target supports debugging agent. */ + int (*supports_agent) (void); + + /* Check whether the target supports branch tracing. */ + int (*supports_btrace) (struct target_ops *, enum btrace_format); + + /* Enable branch tracing for PTID based on CONF and allocate a branch trace + target information struct for reading and for disabling branch trace. */ + struct btrace_target_info *(*enable_btrace) + (ptid_t ptid, const struct btrace_config *conf); + + /* Disable branch tracing. + Returns zero on success, non-zero otherwise. */ + int (*disable_btrace) (struct btrace_target_info *tinfo); + + /* Read branch trace data into buffer. + Return 0 on success; print an error message into BUFFER and return -1, + otherwise. */ + int (*read_btrace) (struct btrace_target_info *, struct buffer *, + enum btrace_read_type type); + + /* Read the branch trace configuration into BUFFER. + Return 0 on success; print an error message into BUFFER and return -1 + otherwise. */ + int (*read_btrace_conf) (const struct btrace_target_info *, struct buffer *); + + /* Return true if target supports range stepping. */ + int (*supports_range_stepping) (void); + + /* Return the full absolute name of the executable file that was + run to create the process PID. If the executable file cannot + be determined, NULL is returned. Otherwise, a pointer to a + character string containing the pathname is returned. This + string should be copied into a buffer by the client if the string + will not be immediately used, or if it must persist. */ + char *(*pid_to_exec_file) (int pid); + + /* Multiple-filesystem-aware open. Like open(2), but operating in + the filesystem as it appears to process PID. Systems where all + processes share a common filesystem should set this to NULL. + If NULL, the caller should fall back to open(2). */ + int (*multifs_open) (int pid, const char *filename, + int flags, mode_t mode); + + /* Multiple-filesystem-aware unlink. Like unlink(2), but operates + in the filesystem as it appears to process PID. Systems where + all processes share a common filesystem should set this to NULL. + If NULL, the caller should fall back to unlink(2). */ + int (*multifs_unlink) (int pid, const char *filename); + + /* Multiple-filesystem-aware readlink. Like readlink(2), but + operating in the filesystem as it appears to process PID. + Systems where all processes share a common filesystem should + set this to NULL. If NULL, the caller should fall back to + readlink(2). */ + ssize_t (*multifs_readlink) (int pid, const char *filename, + char *buf, size_t bufsiz); + + /* Return the breakpoint kind for this target based on PC. The PCPTR is + adjusted to the real memory location in case a flag (e.g., the Thumb bit on + ARM) was present in the PC. */ + int (*breakpoint_kind_from_pc) (CORE_ADDR *pcptr); + + /* Return the software breakpoint from KIND. KIND can have target + specific meaning like the Z0 kind parameter. + SIZE is set to the software breakpoint's length in memory. */ + const gdb_byte *(*sw_breakpoint_from_kind) (int kind, int *size); + + /* Return the thread's name, or NULL if the target is unable to determine it. + The returned value must not be freed by the caller. */ + const char *(*thread_name) (ptid_t thread); + + /* Return the breakpoint kind for this target based on the current + processor state (e.g. the current instruction mode on ARM) and the + PC. The PCPTR is adjusted to the real memory location in case a flag + (e.g., the Thumb bit on ARM) is present in the PC. */ + int (*breakpoint_kind_from_current_state) (CORE_ADDR *pcptr); + + /* Returns true if the target can software single step. */ + int (*supports_software_single_step) (void); + + /* Return 1 if the target supports catch syscall, 0 (or leave the + callback NULL) otherwise. */ + int (*supports_catch_syscall) (void); + + /* Return tdesc index for IPA. */ + int (*get_ipa_tdesc_idx) (void); }; extern struct target_ops *the_target; void set_target_ops (struct target_ops *); -#define create_inferior(program, args) \ - (*the_target->create_inferior) (program, args) +#define create_inferior(program, program_args) \ + (*the_target->create_inferior) (program, program_args) + +#define target_post_create_inferior() \ + do \ + { \ + if (the_target->post_create_inferior != NULL) \ + (*the_target->post_create_inferior) (); \ + } while (0) #define myattach(pid) \ (*the_target->attach) (pid) -#define kill_inferior(pid) \ - (*the_target->kill) (pid) +int kill_inferior (int); + +#define target_supports_fork_events() \ + (the_target->supports_fork_events ? \ + (*the_target->supports_fork_events) () : 0) + +#define target_supports_vfork_events() \ + (the_target->supports_vfork_events ? \ + (*the_target->supports_vfork_events) () : 0) + +#define target_supports_exec_events() \ + (the_target->supports_exec_events ? \ + (*the_target->supports_exec_events) () : 0) + +#define target_handle_new_gdb_connection() \ + do \ + { \ + if (the_target->handle_new_gdb_connection != NULL) \ + (*the_target->handle_new_gdb_connection) (); \ + } while (0) #define detach_inferior(pid) \ (*the_target->detach) (pid) -#define mourn_inferior(PROC) \ - (*the_target->mourn) (PROC) - #define mythread_alive(pid) \ (*the_target->thread_alive) (pid) @@ -351,31 +536,142 @@ void set_target_ops (struct target_ops *); #define target_async(enable) \ (the_target->async ? (*the_target->async) (enable) : 0) -#define target_supports_multi_process() \ - (the_target->supports_multi_process ? \ - (*the_target->supports_multi_process) () : 0) - -#define target_process_qsupported(query) \ +#define target_process_qsupported(features, count) \ do \ { \ if (the_target->process_qsupported) \ - the_target->process_qsupported (query); \ + the_target->process_qsupported (features, count); \ } while (0) +#define target_supports_catch_syscall() \ + (the_target->supports_catch_syscall ? \ + (*the_target->supports_catch_syscall) () : 0) + +#define target_get_ipa_tdesc_idx() \ + (the_target->get_ipa_tdesc_idx \ + ? (*the_target->get_ipa_tdesc_idx) () : 0) + #define target_supports_tracepoints() \ (the_target->supports_tracepoints \ ? (*the_target->supports_tracepoints) () : 0) +#define target_supports_fast_tracepoints() \ + (the_target->install_fast_tracepoint_jump_pad != NULL) + +#define target_get_min_fast_tracepoint_insn_len() \ + (the_target->get_min_fast_tracepoint_insn_len \ + ? (*the_target->get_min_fast_tracepoint_insn_len) () : 0) + #define thread_stopped(thread) \ (*the_target->thread_stopped) (thread) -#define pause_all() \ - do \ - { \ - if (the_target->pause_all) \ - (*the_target->pause_all) (); \ +#define pause_all(freeze) \ + do \ + { \ + if (the_target->pause_all) \ + (*the_target->pause_all) (freeze); \ + } while (0) + +#define unpause_all(unfreeze) \ + do \ + { \ + if (the_target->unpause_all) \ + (*the_target->unpause_all) (unfreeze); \ + } while (0) + +#define stabilize_threads() \ + do \ + { \ + if (the_target->stabilize_threads) \ + (*the_target->stabilize_threads) (); \ } while (0) +#define install_fast_tracepoint_jump_pad(tpoint, tpaddr, \ + collector, lockaddr, \ + orig_size, \ + jump_entry, \ + trampoline, trampoline_size, \ + jjump_pad_insn, \ + jjump_pad_insn_size, \ + adjusted_insn_addr, \ + adjusted_insn_addr_end, \ + err) \ + (*the_target->install_fast_tracepoint_jump_pad) (tpoint, tpaddr, \ + collector,lockaddr, \ + orig_size, jump_entry, \ + trampoline, \ + trampoline_size, \ + jjump_pad_insn, \ + jjump_pad_insn_size, \ + adjusted_insn_addr, \ + adjusted_insn_addr_end, \ + err) + +#define target_emit_ops() \ + (the_target->emit_ops ? (*the_target->emit_ops) () : NULL) + +#define target_supports_disable_randomization() \ + (the_target->supports_disable_randomization ? \ + (*the_target->supports_disable_randomization) () : 0) + +#define target_supports_agent() \ + (the_target->supports_agent ? \ + (*the_target->supports_agent) () : 0) + +#define target_supports_btrace(format) \ + (the_target->supports_btrace \ + ? (*the_target->supports_btrace) (the_target, format) : 0) + +#define target_enable_btrace(ptid, conf) \ + (*the_target->enable_btrace) (ptid, conf) + +#define target_disable_btrace(tinfo) \ + (*the_target->disable_btrace) (tinfo) + +#define target_read_btrace(tinfo, buffer, type) \ + (*the_target->read_btrace) (tinfo, buffer, type) + +#define target_read_btrace_conf(tinfo, buffer) \ + (*the_target->read_btrace_conf) (tinfo, buffer) + +#define target_supports_range_stepping() \ + (the_target->supports_range_stepping ? \ + (*the_target->supports_range_stepping) () : 0) + +#define target_supports_stopped_by_sw_breakpoint() \ + (the_target->supports_stopped_by_sw_breakpoint ? \ + (*the_target->supports_stopped_by_sw_breakpoint) () : 0) + +#define target_stopped_by_sw_breakpoint() \ + (the_target->stopped_by_sw_breakpoint ? \ + (*the_target->stopped_by_sw_breakpoint) () : 0) + +#define target_supports_stopped_by_hw_breakpoint() \ + (the_target->supports_stopped_by_hw_breakpoint ? \ + (*the_target->supports_stopped_by_hw_breakpoint) () : 0) + +#define target_supports_hardware_single_step() \ + (the_target->supports_hardware_single_step ? \ + (*the_target->supports_hardware_single_step) () : 0) + +#define target_stopped_by_hw_breakpoint() \ + (the_target->stopped_by_hw_breakpoint ? \ + (*the_target->stopped_by_hw_breakpoint) () : 0) + +#define target_breakpoint_kind_from_pc(pcptr) \ + (the_target->breakpoint_kind_from_pc \ + ? (*the_target->breakpoint_kind_from_pc) (pcptr) \ + : default_breakpoint_kind_from_pc (pcptr)) + +#define target_breakpoint_kind_from_current_state(pcptr) \ + (the_target->breakpoint_kind_from_current_state \ + ? (*the_target->breakpoint_kind_from_current_state) (pcptr) \ + : target_breakpoint_kind_from_pc (pcptr)) + +#define target_supports_software_single_step() \ + (the_target->supports_software_single_step ? \ + (*the_target->supports_software_single_step) () : 0) + /* Start non-stop mode, returns 0 on success, -1 on failure. */ int start_non_stop (int nonstop); @@ -383,15 +679,31 @@ int start_non_stop (int nonstop); ptid_t mywait (ptid_t ptid, struct target_waitstatus *ourstatus, int options, int connected_wait); +/* Prepare to read or write memory from the inferior process. See the + corresponding target_ops methods for more details. */ + +int prepare_to_access_memory (void); +void done_accessing_memory (void); + +#define target_core_of_thread(ptid) \ + (the_target->core_of_thread ? (*the_target->core_of_thread) (ptid) \ + : -1) + +#define target_thread_name(ptid) \ + (the_target->thread_name ? (*the_target->thread_name) (ptid) \ + : NULL) + int read_inferior_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len); int write_inferior_memory (CORE_ADDR memaddr, const unsigned char *myaddr, int len); -void set_desired_inferior (int id); +int set_desired_thread (int id); const char *target_pid_to_str (ptid_t); -const char *target_waitstatus_to_string (const struct target_waitstatus *); +int target_can_do_hardware_single_step (void); + +int default_breakpoint_kind_from_pc (CORE_ADDR *pcptr); #endif /* TARGET_H */