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 AUTHORS ``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 AUTHORS 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 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD$"); 29 30#include <sys/param.h> 31#include <sys/systm.h> 32#include <sys/kdb.h> 33#include <sys/kernel.h> 34#include <sys/proc.h> 35#include <sys/signal.h> 36 37#include <machine/gdb_machdep.h> 38#include <machine/pcb.h> 39#include <machine/trap.h> 40#include <machine/frame.h> 41#include <machine/endian.h> 42 43#include <gdb/gdb.h> 44 45void * 46gdb_cpu_getreg(int regnum, size_t *regsz) 47{ 48 49 *regsz = gdb_cpu_regsz(regnum); 50 51 if (kdb_thread == curthread) { 52 switch (regnum) { 53 case 0: return (&kdb_frame->tf_eax); 54 case 1: return (&kdb_frame->tf_ecx); 55 case 2: return (&kdb_frame->tf_edx); 56 } 57 } 58 switch (regnum) { 59 case 3: return (&kdb_thrctx->pcb_ebx); 60 case 4: return (&kdb_thrctx->pcb_esp); 61 case 5: return (&kdb_thrctx->pcb_ebp); 62 case 6: return (&kdb_thrctx->pcb_esi); 63 case 7: return (&kdb_thrctx->pcb_edi); 64 case 8: return (&kdb_thrctx->pcb_eip); 65 } 66 return (NULL); 67} 68 69void 70gdb_cpu_setreg(int regnum, void *val) 71{ 72 73 switch (regnum) { 74 case GDB_REG_PC: 75 kdb_thrctx->pcb_eip = *(register_t *)val; 76 if (kdb_thread == curthread) 77 kdb_frame->tf_eip = *(register_t *)val; 78 } 79} 80 81int 82gdb_cpu_signal(int type, int code) 83{ 84 85 switch (type & ~T_USER) { 86 case 0: return (SIGFPE); /* Divide by zero. */ 87 case 1: return (SIGTRAP); /* Debug exception. */ 88 case 3: return (SIGTRAP); /* Breakpoint. */ 89 case 4: return (SIGURG); /* into instr. (overflow). */ 90 case 5: return (SIGURG); /* bound instruction. */ 91 case 6: return (SIGILL); /* Invalid opcode. */ 92 case 7: return (SIGFPE); /* Coprocessor not present. */ 93 case 8: return (SIGEMT); /* Double fault. */ 94 case 9: return (SIGSEGV); /* Coprocessor segment overrun. */ 95 case 10: return (SIGTRAP); /* Invalid TSS (also single-step). */ 96 case 11: return (SIGSEGV); /* Segment not present. */ 97 case 12: return (SIGSEGV); /* Stack exception. */ 98 case 13: return (SIGSEGV); /* General protection. */ 99 case 14: return (SIGSEGV); /* Page fault. */ 100 case 16: return (SIGEMT); /* Coprocessor error. */ 101 } 102 return (SIGEMT); 103} 104