1 /* Target operations for the remote server for GDB. 2 Copyright 2002, 2003, 2004 3 Free Software Foundation, Inc. 4 5 Contributed by MontaVista Software. 6 7 This file is part of GDB. 8 9 This program is free software; you can redistribute it and/or modify 10 it under the terms of the GNU General Public License as published by 11 the Free Software Foundation; either version 2 of the License, or 12 (at your option) any later version. 13 14 This program is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with this program; if not, write to the Free Software 21 Foundation, Inc., 59 Temple Place - Suite 330, 22 Boston, MA 02111-1307, USA. */ 23 24 #ifndef TARGET_H 25 #define TARGET_H 26 27 /* This structure describes how to resume a particular thread (or 28 all threads) based on the client's request. If thread is -1, then 29 this entry applies to all threads. These are generally passed around 30 as an array, and terminated by a thread == -1 entry. */ 31 32 struct thread_resume 33 { 34 int thread; 35 36 /* If non-zero, leave this thread stopped. */ 37 int leave_stopped; 38 39 /* If non-zero, we want to single-step. */ 40 int step; 41 42 /* If non-zero, send this signal when we resume. */ 43 int sig; 44 }; 45 46 struct target_ops 47 { 48 /* Start a new process. 49 50 PROGRAM is a path to the program to execute. 51 ARGS is a standard NULL-terminated array of arguments, 52 to be passed to the inferior as ``argv''. 53 54 Returns the new PID on success, -1 on failure. Registers the new 55 process with the process list. */ 56 57 int (*create_inferior) (char *program, char **args); 58 59 /* Attach to a running process. 60 61 PID is the process ID to attach to, specified by the user 62 or a higher layer. */ 63 64 int (*attach) (int pid); 65 66 /* Kill all inferiors. */ 67 68 void (*kill) (void); 69 70 /* Detach from all inferiors. */ 71 72 void (*detach) (void); 73 74 /* Return 1 iff the thread with process ID PID is alive. */ 75 76 int (*thread_alive) (int pid); 77 78 /* Resume the inferior process. */ 79 80 void (*resume) (struct thread_resume *resume_info); 81 82 /* Wait for the inferior process to change state. 83 84 STATUSP will be filled in with a response code to send to GDB. 85 86 Returns the signal which caused the process to stop. */ 87 88 unsigned char (*wait) (char *status); 89 90 /* Fetch registers from the inferior process. 91 92 If REGNO is -1, fetch all registers; otherwise, fetch at least REGNO. */ 93 94 void (*fetch_registers) (int regno); 95 96 /* Store registers to the inferior process. 97 98 If REGNO is -1, store all registers; otherwise, store at least REGNO. */ 99 100 void (*store_registers) (int regno); 101 102 /* Read memory from the inferior process. This should generally be 103 called through read_inferior_memory, which handles breakpoint shadowing. 104 105 Read LEN bytes at MEMADDR into a buffer at MYADDR. 106 107 Returns 0 on success and errno on failure. */ 108 109 int (*read_memory) (CORE_ADDR memaddr, char *myaddr, int len); 110 111 /* Write memory to the inferior process. This should generally be 112 called through write_inferior_memory, which handles breakpoint shadowing. 113 114 Write LEN bytes from the buffer at MYADDR to MEMADDR. 115 116 Returns 0 on success and errno on failure. */ 117 118 int (*write_memory) (CORE_ADDR memaddr, const char *myaddr, int len); 119 120 /* Query GDB for the values of any symbols we're interested in. 121 This function is called whenever we receive a "qSymbols::" 122 query, which corresponds to every time more symbols (might) 123 become available. NULL if we aren't interested in any 124 symbols. */ 125 126 void (*look_up_symbols) (void); 127 128 /* Send a signal to the inferior process, however is appropriate. */ 129 void (*send_signal) (int); 130 131 /* Read auxiliary vector data from the inferior process. 132 133 Read LEN bytes at OFFSET into a buffer at MYADDR. */ 134 135 int (*read_auxv) (CORE_ADDR offset, char *myaddr, unsigned int len); 136 }; 137 138 extern struct target_ops *the_target; 139 140 void set_target_ops (struct target_ops *); 141 142 #define create_inferior(program, args) \ 143 (*the_target->create_inferior) (program, args) 144 145 #define myattach(pid) \ 146 (*the_target->attach) (pid) 147 148 #define kill_inferior() \ 149 (*the_target->kill) () 150 151 #define detach_inferior() \ 152 (*the_target->detach) () 153 154 #define mythread_alive(pid) \ 155 (*the_target->thread_alive) (pid) 156 157 #define fetch_inferior_registers(regno) \ 158 (*the_target->fetch_registers) (regno) 159 160 #define store_inferior_registers(regno) \ 161 (*the_target->store_registers) (regno) 162 163 unsigned char mywait (char *statusp, int connected_wait); 164 165 int read_inferior_memory (CORE_ADDR memaddr, char *myaddr, int len); 166 167 int write_inferior_memory (CORE_ADDR memaddr, const char *myaddr, int len); 168 169 void set_desired_inferior (int id); 170 171 #endif /* TARGET_H */ 172