1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2006 Marcel Moolenaar 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/kdb.h> 35 #include <sys/kernel.h> 36 #include <sys/proc.h> 37 #include <sys/signal.h> 38 39 #include <machine/gdb_machdep.h> 40 #include <machine/pcb.h> 41 #include <machine/reg.h> 42 43 #include <machine/hid.h> 44 #include <machine/spr.h> 45 46 #include <machine/trap.h> 47 48 #include <gdb/gdb.h> 49 #include <gdb/gdb_int.h> 50 51 void * 52 gdb_cpu_getreg(int regnum, size_t *regsz) 53 { 54 55 *regsz = gdb_cpu_regsz(regnum); 56 57 if (kdb_thread == curthread) { 58 if (regnum == 0 || (regnum >= 2 && regnum <= 31)) 59 return (kdb_frame->fixreg + regnum); 60 if (regnum == 64) 61 return (&kdb_frame->srr0); 62 if (regnum == 67) 63 return (&kdb_frame->lr); 64 } 65 66 if (regnum == 1) 67 return (&kdb_thrctx->pcb_sp); 68 if (regnum >= 14 && regnum <= 31) 69 return (kdb_thrctx->pcb_context + (regnum - 14)); 70 if (regnum == 64) 71 return (&kdb_thrctx->pcb_lr); 72 73 return (NULL); 74 } 75 76 void 77 gdb_cpu_setreg(int regnum, void *val) 78 { 79 80 switch (regnum) { 81 case GDB_REG_PC: 82 break; 83 } 84 } 85 86 int 87 gdb_cpu_signal(int vector, int dummy __unused) 88 { 89 #if defined(BOOKE) 90 if (vector == EXC_DEBUG || vector == EXC_PGM) 91 return (SIGTRAP); 92 #else 93 if (vector == EXC_TRC || vector == EXC_RUNMODETRC) 94 return (SIGTRAP); 95 #endif 96 97 if (vector <= 255) 98 return (vector); 99 else 100 return (SIGEMT); 101 } 102