1 /* 2 * Copyright (c) 2004 Marcel Moolenaar 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 * 26 * $FreeBSD: src/gnu/usr.bin/gdb/kgdb/trgt.c,v 1.4 2005/09/10 18:25:53 marcel Exp $ 27 * $DragonFly: src/gnu/usr.bin/gdb/kgdb/trgt.c,v 1.1 2006/03/07 15:48:11 corecode Exp $ 28 */ 29 30 #include <sys/cdefs.h> 31 32 #include <sys/param.h> 33 /*#include <sys/proc.h>*/ 34 #include <sys/sysctl.h> 35 #include <sys/user.h> 36 #include <kvm.h> 37 38 #include <defs.h> 39 #include <command.h> 40 #include <frame-unwind.h> 41 #include <gdbthread.h> 42 #include <inferior.h> 43 #include <regcache.h> 44 #include <target.h> 45 46 #include "kgdb.h" 47 48 static struct target_ops kgdb_trgt_ops; 49 50 static char * 51 kgdb_trgt_extra_thread_info(struct thread_info *ti) 52 { 53 static char buf[64]; 54 char *p, *s; 55 56 p = buf + snprintf(buf, sizeof(buf), "PID=%d", ptid_get_pid(ti->ptid)); 57 s = kgdb_thr_extra_thread_info(ptid_get_tid(ti->ptid)); 58 if (s != NULL) 59 snprintf(p, sizeof(buf) - (p - buf), ": %s", s); 60 return (buf); 61 } 62 63 static void 64 kgdb_trgt_files_info(struct target_ops *target) 65 { 66 struct target_ops *tb; 67 68 tb = find_target_beneath(target); 69 if (tb->to_files_info != NULL) 70 tb->to_files_info(tb); 71 } 72 73 static void 74 kgdb_trgt_find_new_threads(void) 75 { 76 struct target_ops *tb; 77 78 if (kvm != NULL) 79 return; 80 81 tb = find_target_beneath(&kgdb_trgt_ops); 82 if (tb->to_find_new_threads != NULL) 83 tb->to_find_new_threads(); 84 } 85 86 static char * 87 kgdb_trgt_pid_to_str(ptid_t ptid) 88 { 89 static char buf[33]; 90 91 snprintf(buf, sizeof(buf), "Thread %#lx", ptid_get_tid(ptid)); 92 return (buf); 93 } 94 95 static int 96 kgdb_trgt_thread_alive(ptid_t ptid) 97 { 98 return (kgdb_thr_lookup_tid(ptid_get_tid(ptid)) != NULL); 99 } 100 101 static int 102 kgdb_trgt_xfer_memory(CORE_ADDR memaddr, char *myaddr, int len, int write, 103 struct mem_attrib *attrib, struct target_ops *target) 104 { 105 struct target_ops *tb; 106 107 if (kvm != NULL) { 108 if (len == 0) 109 return (0); 110 if (!write) 111 return (kvm_read(kvm, memaddr, myaddr, len)); 112 else 113 return (kvm_write(kvm, memaddr, myaddr, len)); 114 } 115 tb = find_target_beneath(target); 116 return (tb->to_xfer_memory(memaddr, myaddr, len, write, attrib, tb)); 117 } 118 119 void 120 kgdb_target(void) 121 { 122 struct kthr *kt; 123 struct thread_info *ti; 124 125 kgdb_trgt_ops.to_magic = OPS_MAGIC; 126 kgdb_trgt_ops.to_shortname = "kernel"; 127 kgdb_trgt_ops.to_longname = "kernel core files."; 128 kgdb_trgt_ops.to_doc = "Kernel core files."; 129 kgdb_trgt_ops.to_stratum = thread_stratum; 130 kgdb_trgt_ops.to_has_memory = 1; 131 kgdb_trgt_ops.to_has_registers = 1; 132 kgdb_trgt_ops.to_has_stack = 1; 133 134 kgdb_trgt_ops.to_extra_thread_info = kgdb_trgt_extra_thread_info; 135 kgdb_trgt_ops.to_fetch_registers = kgdb_trgt_fetch_registers; 136 kgdb_trgt_ops.to_files_info = kgdb_trgt_files_info; 137 kgdb_trgt_ops.to_find_new_threads = kgdb_trgt_find_new_threads; 138 kgdb_trgt_ops.to_pid_to_str = kgdb_trgt_pid_to_str; 139 kgdb_trgt_ops.to_store_registers = kgdb_trgt_store_registers; 140 kgdb_trgt_ops.to_thread_alive = kgdb_trgt_thread_alive; 141 kgdb_trgt_ops.to_xfer_memory = kgdb_trgt_xfer_memory; 142 add_target(&kgdb_trgt_ops); 143 push_target(&kgdb_trgt_ops); 144 145 kt = kgdb_thr_first(); 146 while (kt != NULL) { 147 ti = add_thread(ptid_build(kt->pid, 0, kt->tid)); 148 kt = kgdb_thr_next(kt); 149 } 150 if (curkthr != 0) 151 inferior_ptid = ptid_build(curkthr->pid, 0, curkthr->tid); 152 } 153