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/frame.h> 38 #include <machine/gdb_machdep.h> 39 #include <machine/psl.h> 40 #include <machine/reg.h> 41 #include <machine/trap.h> 42 43 #include <gdb/gdb.h> 44 45 void * 46 gdb_cpu_getreg(int regnum, size_t *regsz) 47 { 48 struct trapframe *tf = kdb_frame; 49 50 *regsz = gdb_cpu_regsz(regnum); 51 switch (regnum) { 52 case 0: return (&tf->tf_rax); 53 case 1: return (&tf->tf_rbx); 54 case 2: return (&tf->tf_rcx); 55 case 3: return (&tf->tf_rdx); 56 case 4: return (&tf->tf_rsi); 57 case 5: return (&tf->tf_rdi); 58 case 6: return (&tf->tf_rbp); 59 case 7: return (&tf->tf_rsp); 60 case 8: return (&tf->tf_r8); 61 case 9: return (&tf->tf_r9); 62 case 10: return (&tf->tf_r10); 63 case 11: return (&tf->tf_r11); 64 case 12: return (&tf->tf_r12); 65 case 13: return (&tf->tf_r13); 66 case 14: return (&tf->tf_r14); 67 case 15: return (&tf->tf_r15); 68 case 16: return (&tf->tf_rip); 69 case 17: return (&tf->tf_rflags); 70 case 18: return (&tf->tf_cs); 71 case 19: return (&tf->tf_ss); 72 } 73 return (NULL); 74 } 75 76 void 77 gdb_cpu_setreg(int regnum, register_t val) 78 { 79 struct trapframe *tf = kdb_frame; 80 81 switch (regnum) { 82 case GDB_REG_PC: tf->tf_rip = val; break; 83 } 84 } 85