619 lines
21 KiB
C
619 lines
21 KiB
C
/* Target operations for the remote server for GDB.
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Copyright (C) 2002-2015 Free Software Foundation, Inc.
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Contributed by MontaVista Software.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifndef TARGET_H
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#define TARGET_H
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#include "target/target.h"
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#include "target/resume.h"
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#include "target/wait.h"
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#include "target/waitstatus.h"
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#include "mem-break.h"
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#include "btrace-common.h"
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struct emit_ops;
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struct buffer;
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struct process_info;
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/* This structure describes how to resume a particular thread (or all
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threads) based on the client's request. If thread is -1, then this
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entry applies to all threads. These are passed around as an
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array. */
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struct thread_resume
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{
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ptid_t thread;
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/* How to "resume". */
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enum resume_kind kind;
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/* If non-zero, send this signal when we resume, or to stop the
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thread. If stopping a thread, and this is 0, the target should
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stop the thread however it best decides to (e.g., SIGSTOP on
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linux; SuspendThread on win32). This is a host signal value (not
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enum gdb_signal). */
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int sig;
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/* Range to single step within. Valid only iff KIND is resume_step.
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Single-step once, and then continuing stepping as long as the
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thread stops in this range. (If the range is empty
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[STEP_RANGE_START == STEP_RANGE_END], then this is a single-step
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request.) */
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CORE_ADDR step_range_start; /* Inclusive */
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CORE_ADDR step_range_end; /* Exclusive */
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};
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struct target_ops
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{
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/* Start a new process.
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PROGRAM is a path to the program to execute.
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ARGS is a standard NULL-terminated array of arguments,
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to be passed to the inferior as ``argv''.
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Returns the new PID on success, -1 on failure. Registers the new
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process with the process list. */
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int (*create_inferior) (char *program, char **args);
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/* Attach to a running process.
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PID is the process ID to attach to, specified by the user
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or a higher layer.
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Returns -1 if attaching is unsupported, 0 on success, and calls
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error() otherwise. */
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int (*attach) (unsigned long pid);
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/* Kill inferior PID. Return -1 on failure, and 0 on success. */
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int (*kill) (int pid);
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/* Detach from inferior PID. Return -1 on failure, and 0 on
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success. */
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int (*detach) (int pid);
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/* The inferior process has died. Do what is right. */
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void (*mourn) (struct process_info *proc);
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/* Wait for inferior PID to exit. */
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void (*join) (int pid);
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/* Return 1 iff the thread with process ID PID is alive. */
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int (*thread_alive) (ptid_t pid);
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/* Resume the inferior process. */
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void (*resume) (struct thread_resume *resume_info, size_t n);
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/* Wait for the inferior process or thread to change state. Store
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status through argument pointer STATUS.
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PTID = -1 to wait for any pid to do something, PTID(pid,0,0) to
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wait for any thread of process pid to do something. Return ptid
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of child, or -1 in case of error; store status through argument
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pointer STATUS. OPTIONS is a bit set of options defined as
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TARGET_W* above. If options contains TARGET_WNOHANG and there's
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no child stop to report, return is
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null_ptid/TARGET_WAITKIND_IGNORE. */
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ptid_t (*wait) (ptid_t ptid, struct target_waitstatus *status, int options);
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/* Fetch registers from the inferior process.
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If REGNO is -1, fetch all registers; otherwise, fetch at least REGNO. */
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void (*fetch_registers) (struct regcache *regcache, int regno);
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/* Store registers to the inferior process.
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If REGNO is -1, store all registers; otherwise, store at least REGNO. */
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void (*store_registers) (struct regcache *regcache, int regno);
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/* Prepare to read or write memory from the inferior process.
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Targets use this to do what is necessary to get the state of the
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inferior such that it is possible to access memory.
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This should generally only be called from client facing routines,
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such as gdb_read_memory/gdb_write_memory, or the GDB breakpoint
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insertion routine.
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Like `read_memory' and `write_memory' below, returns 0 on success
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and errno on failure. */
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int (*prepare_to_access_memory) (void);
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/* Undo the effects of prepare_to_access_memory. */
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void (*done_accessing_memory) (void);
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/* Read memory from the inferior process. This should generally be
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called through read_inferior_memory, which handles breakpoint shadowing.
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Read LEN bytes at MEMADDR into a buffer at MYADDR.
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Returns 0 on success and errno on failure. */
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int (*read_memory) (CORE_ADDR memaddr, unsigned char *myaddr, int len);
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/* Write memory to the inferior process. This should generally be
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called through write_inferior_memory, which handles breakpoint shadowing.
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Write LEN bytes from the buffer at MYADDR to MEMADDR.
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Returns 0 on success and errno on failure. */
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int (*write_memory) (CORE_ADDR memaddr, const unsigned char *myaddr,
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int len);
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/* Query GDB for the values of any symbols we're interested in.
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This function is called whenever we receive a "qSymbols::"
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query, which corresponds to every time more symbols (might)
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become available. NULL if we aren't interested in any
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symbols. */
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void (*look_up_symbols) (void);
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/* Send an interrupt request to the inferior process,
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however is appropriate. */
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void (*request_interrupt) (void);
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/* Read auxiliary vector data from the inferior process.
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Read LEN bytes at OFFSET into a buffer at MYADDR. */
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int (*read_auxv) (CORE_ADDR offset, unsigned char *myaddr,
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unsigned int len);
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/* Returns true if GDB Z breakpoint type TYPE is supported, false
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otherwise. The type is coded as follows:
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'0' - software-breakpoint
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'1' - hardware-breakpoint
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'2' - write watchpoint
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'3' - read watchpoint
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'4' - access watchpoint
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*/
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int (*supports_z_point_type) (char z_type);
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/* Insert and remove a break or watchpoint.
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Returns 0 on success, -1 on failure and 1 on unsupported. */
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int (*insert_point) (enum raw_bkpt_type type, CORE_ADDR addr,
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int size, struct raw_breakpoint *bp);
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int (*remove_point) (enum raw_bkpt_type type, CORE_ADDR addr,
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int size, struct raw_breakpoint *bp);
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/* Returns 1 if the target stopped because it executed a software
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breakpoint instruction, 0 otherwise. */
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int (*stopped_by_sw_breakpoint) (void);
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/* Returns true if the target knows whether a trap was caused by a
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SW breakpoint triggering. */
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int (*supports_stopped_by_sw_breakpoint) (void);
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/* Returns 1 if the target stopped for a hardware breakpoint. */
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int (*stopped_by_hw_breakpoint) (void);
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/* Returns true if the target knows whether a trap was caused by a
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HW breakpoint triggering. */
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int (*supports_stopped_by_hw_breakpoint) (void);
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/* Returns true if the target can evaluate conditions of
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breakpoints. */
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int (*supports_conditional_breakpoints) (void);
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/* Returns 1 if target was stopped due to a watchpoint hit, 0 otherwise. */
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int (*stopped_by_watchpoint) (void);
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/* Returns the address associated with the watchpoint that hit, if any;
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returns 0 otherwise. */
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CORE_ADDR (*stopped_data_address) (void);
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/* Reports the text, data offsets of the executable. This is
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needed for uclinux where the executable is relocated during load
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time. */
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int (*read_offsets) (CORE_ADDR *text, CORE_ADDR *data);
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/* Fetch the address associated with a specific thread local storage
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area, determined by the specified THREAD, OFFSET, and LOAD_MODULE.
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Stores it in *ADDRESS and returns zero on success; otherwise returns
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an error code. A return value of -1 means this system does not
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support the operation. */
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int (*get_tls_address) (struct thread_info *thread, CORE_ADDR offset,
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CORE_ADDR load_module, CORE_ADDR *address);
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/* Read/Write from/to spufs using qXfer packets. */
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int (*qxfer_spu) (const char *annex, unsigned char *readbuf,
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unsigned const char *writebuf, CORE_ADDR offset, int len);
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/* Fill BUF with an hostio error packet representing the last hostio
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error. */
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void (*hostio_last_error) (char *buf);
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/* Read/Write OS data using qXfer packets. */
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int (*qxfer_osdata) (const char *annex, unsigned char *readbuf,
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unsigned const char *writebuf, CORE_ADDR offset,
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int len);
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/* Read/Write extra signal info. */
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int (*qxfer_siginfo) (const char *annex, unsigned char *readbuf,
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unsigned const char *writebuf,
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CORE_ADDR offset, int len);
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int (*supports_non_stop) (void);
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/* Enables async target events. Returns the previous enable
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state. */
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int (*async) (int enable);
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/* Switch to non-stop (1) or all-stop (0) mode. Return 0 on
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success, -1 otherwise. */
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int (*start_non_stop) (int);
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/* Returns true if the target supports multi-process debugging. */
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int (*supports_multi_process) (void);
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/* Returns true if fork events are supported. */
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int (*supports_fork_events) (void);
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/* Returns true if vfork events are supported. */
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int (*supports_vfork_events) (void);
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/* Allows target to re-initialize connection-specific settings. */
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void (*handle_new_gdb_connection) (void);
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/* If not NULL, target-specific routine to process monitor command.
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Returns 1 if handled, or 0 to perform default processing. */
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int (*handle_monitor_command) (char *);
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/* Returns the core given a thread, or -1 if not known. */
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int (*core_of_thread) (ptid_t);
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/* Read loadmaps. Read LEN bytes at OFFSET into a buffer at MYADDR. */
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int (*read_loadmap) (const char *annex, CORE_ADDR offset,
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unsigned char *myaddr, unsigned int len);
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/* Target specific qSupported support. */
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void (*process_qsupported) (const char *);
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/* Return 1 if the target supports tracepoints, 0 (or leave the
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callback NULL) otherwise. */
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int (*supports_tracepoints) (void);
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/* Read PC from REGCACHE. */
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CORE_ADDR (*read_pc) (struct regcache *regcache);
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/* Write PC to REGCACHE. */
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void (*write_pc) (struct regcache *regcache, CORE_ADDR pc);
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/* Return true if THREAD is known to be stopped now. */
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int (*thread_stopped) (struct thread_info *thread);
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/* Read Thread Information Block address. */
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int (*get_tib_address) (ptid_t ptid, CORE_ADDR *address);
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/* Pause all threads. If FREEZE, arrange for any resume attempt to
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be ignored until an unpause_all call unfreezes threads again.
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There can be nested calls to pause_all, so a freeze counter
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should be maintained. */
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void (*pause_all) (int freeze);
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/* Unpause all threads. Threads that hadn't been resumed by the
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client should be left stopped. Basically a pause/unpause call
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pair should not end up resuming threads that were stopped before
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the pause call. */
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void (*unpause_all) (int unfreeze);
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/* Stabilize all threads. That is, force them out of jump pads. */
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void (*stabilize_threads) (void);
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/* Install a fast tracepoint jump pad. TPOINT is the address of the
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tracepoint internal object as used by the IPA agent. TPADDR is
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the address of tracepoint. COLLECTOR is address of the function
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the jump pad redirects to. LOCKADDR is the address of the jump
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pad lock object. ORIG_SIZE is the size in bytes of the
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instruction at TPADDR. JUMP_ENTRY points to the address of the
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jump pad entry, and on return holds the address past the end of
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the created jump pad. If a trampoline is created by the function,
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then TRAMPOLINE and TRAMPOLINE_SIZE return the address and size of
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the trampoline, else they remain unchanged. JJUMP_PAD_INSN is a
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buffer containing a copy of the instruction at TPADDR.
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ADJUST_INSN_ADDR and ADJUST_INSN_ADDR_END are output parameters that
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return the address range where the instruction at TPADDR was relocated
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to. If an error occurs, the ERR may be used to pass on an error
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message. */
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int (*install_fast_tracepoint_jump_pad) (CORE_ADDR tpoint, CORE_ADDR tpaddr,
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CORE_ADDR collector,
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CORE_ADDR lockaddr,
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ULONGEST orig_size,
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CORE_ADDR *jump_entry,
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CORE_ADDR *trampoline,
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ULONGEST *trampoline_size,
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unsigned char *jjump_pad_insn,
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ULONGEST *jjump_pad_insn_size,
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CORE_ADDR *adjusted_insn_addr,
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CORE_ADDR *adjusted_insn_addr_end,
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char *err);
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/* Return the bytecode operations vector for the current inferior.
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Returns NULL if bytecode compilation is not supported. */
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struct emit_ops *(*emit_ops) (void);
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/* Returns true if the target supports disabling randomization. */
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int (*supports_disable_randomization) (void);
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/* Return the minimum length of an instruction that can be safely overwritten
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for use as a fast tracepoint. */
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int (*get_min_fast_tracepoint_insn_len) (void);
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/* Read solib info on SVR4 platforms. */
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int (*qxfer_libraries_svr4) (const char *annex, unsigned char *readbuf,
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unsigned const char *writebuf,
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CORE_ADDR offset, int len);
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/* Return true if target supports debugging agent. */
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int (*supports_agent) (void);
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/* Check whether the target supports branch tracing. */
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int (*supports_btrace) (struct target_ops *, enum btrace_format);
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/* Enable branch tracing for PTID based on CONF and allocate a branch trace
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target information struct for reading and for disabling branch trace. */
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struct btrace_target_info *(*enable_btrace)
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(ptid_t ptid, const struct btrace_config *conf);
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/* Disable branch tracing.
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Returns zero on success, non-zero otherwise. */
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int (*disable_btrace) (struct btrace_target_info *tinfo);
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/* Read branch trace data into buffer. We use an int to specify the type
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to break a cyclic dependency.
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Return 0 on success; print an error message into BUFFER and return -1,
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otherwise. */
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int (*read_btrace) (struct btrace_target_info *, struct buffer *, int type);
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/* Read the branch trace configuration into BUFFER.
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Return 0 on success; print an error message into BUFFER and return -1
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otherwise. */
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int (*read_btrace_conf) (const struct btrace_target_info *, struct buffer *);
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/* Return true if target supports range stepping. */
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int (*supports_range_stepping) (void);
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/* Return the full absolute name of the executable file that was
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run to create the process PID. If the executable file cannot
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be determined, NULL is returned. Otherwise, a pointer to a
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character string containing the pathname is returned. This
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string should be copied into a buffer by the client if the string
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will not be immediately used, or if it must persist. */
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char *(*pid_to_exec_file) (int pid);
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};
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extern struct target_ops *the_target;
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void set_target_ops (struct target_ops *);
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#define create_inferior(program, args) \
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(*the_target->create_inferior) (program, args)
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#define myattach(pid) \
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(*the_target->attach) (pid)
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int kill_inferior (int);
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#define target_supports_fork_events() \
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(the_target->supports_fork_events ? \
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(*the_target->supports_fork_events) () : 0)
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#define target_supports_vfork_events() \
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(the_target->supports_vfork_events ? \
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(*the_target->supports_vfork_events) () : 0)
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#define target_handle_new_gdb_connection() \
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(the_target->handle_new_gdb_connection ? \
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(*the_target->handle_new_gdb_connection) () : 0)
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#define detach_inferior(pid) \
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(*the_target->detach) (pid)
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#define mourn_inferior(PROC) \
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(*the_target->mourn) (PROC)
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#define mythread_alive(pid) \
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(*the_target->thread_alive) (pid)
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#define fetch_inferior_registers(regcache, regno) \
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(*the_target->fetch_registers) (regcache, regno)
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#define store_inferior_registers(regcache, regno) \
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(*the_target->store_registers) (regcache, regno)
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#define join_inferior(pid) \
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(*the_target->join) (pid)
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#define target_supports_non_stop() \
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(the_target->supports_non_stop ? (*the_target->supports_non_stop ) () : 0)
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#define target_async(enable) \
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(the_target->async ? (*the_target->async) (enable) : 0)
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#define target_supports_multi_process() \
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(the_target->supports_multi_process ? \
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(*the_target->supports_multi_process) () : 0)
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#define target_process_qsupported(query) \
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do \
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{ \
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if (the_target->process_qsupported) \
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the_target->process_qsupported (query); \
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} while (0)
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#define target_supports_tracepoints() \
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(the_target->supports_tracepoints \
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? (*the_target->supports_tracepoints) () : 0)
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#define target_supports_fast_tracepoints() \
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(the_target->install_fast_tracepoint_jump_pad != NULL)
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#define target_get_min_fast_tracepoint_insn_len() \
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(the_target->get_min_fast_tracepoint_insn_len \
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? (*the_target->get_min_fast_tracepoint_insn_len) () : 0)
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#define thread_stopped(thread) \
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(*the_target->thread_stopped) (thread)
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#define pause_all(freeze) \
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do \
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{ \
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if (the_target->pause_all) \
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(*the_target->pause_all) (freeze); \
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} while (0)
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#define unpause_all(unfreeze) \
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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_conditional_breakpoints() \
|
|
(the_target->supports_conditional_breakpoints ? \
|
|
(*the_target->supports_conditional_breakpoints) () : 0)
|
|
|
|
#define target_stopped_by_hw_breakpoint() \
|
|
(the_target->stopped_by_hw_breakpoint ? \
|
|
(*the_target->stopped_by_hw_breakpoint) () : 0)
|
|
|
|
/* Start non-stop mode, returns 0 on success, -1 on failure. */
|
|
|
|
int start_non_stop (int nonstop);
|
|
|
|
ptid_t mywait (ptid_t ptid, struct target_waitstatus *ourstatus, int options,
|
|
int connected_wait);
|
|
|
|
#define prepare_to_access_memory() \
|
|
(the_target->prepare_to_access_memory \
|
|
? (*the_target->prepare_to_access_memory) () \
|
|
: 0)
|
|
|
|
#define done_accessing_memory() \
|
|
do \
|
|
{ \
|
|
if (the_target->done_accessing_memory) \
|
|
(*the_target->done_accessing_memory) (); \
|
|
} while (0)
|
|
|
|
#define target_core_of_thread(ptid) \
|
|
(the_target->core_of_thread ? (*the_target->core_of_thread) (ptid) \
|
|
: -1)
|
|
|
|
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_thread (int id);
|
|
|
|
const char *target_pid_to_str (ptid_t);
|
|
|
|
#endif /* TARGET_H */
|