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/pcb.h> 40 #include <machine/psl.h> 41 #include <machine/reg.h> 42 #include <machine/trap.h> 43 #include <machine/frame.h> 44 #include <machine/endian.h> 45 46 #include <gdb/gdb.h> 47 48 void * 49 gdb_cpu_getreg(int regnum, size_t *regsz) 50 { 51 static uint32_t _kcodesel = GSEL(GCODE_SEL, SEL_KPL); 52 static uint32_t _kdatasel = GSEL(GDATA_SEL, SEL_KPL); 53 54 *regsz = gdb_cpu_regsz(regnum); 55 56 if (kdb_thread == curthread) { 57 switch (regnum) { 58 case 0: return (&kdb_frame->tf_rax); 59 case 2: return (&kdb_frame->tf_rcx); 60 case 3: return (&kdb_frame->tf_rdx); 61 case 4: return (&kdb_frame->tf_rsi); 62 case 5: return (&kdb_frame->tf_rdi); 63 case 8: return (&kdb_frame->tf_r8); 64 case 9: return (&kdb_frame->tf_r9); 65 case 10: return (&kdb_frame->tf_r10); 66 case 11: return (&kdb_frame->tf_r11); 67 case 17: return (&kdb_frame->tf_rflags); 68 case 18: return (&kdb_frame->tf_cs); 69 case 19: return (&kdb_frame->tf_ss); 70 } 71 } 72 switch (regnum) { 73 case 1: return (&kdb_thrctx->pcb_rbx); 74 case 6: return (&kdb_thrctx->pcb_rbp); 75 case 7: return (&kdb_thrctx->pcb_rsp); 76 case 12: return (&kdb_thrctx->pcb_r12); 77 case 13: return (&kdb_thrctx->pcb_r13); 78 case 14: return (&kdb_thrctx->pcb_r14); 79 case 15: return (&kdb_thrctx->pcb_r15); 80 case 16: return (&kdb_thrctx->pcb_rip); 81 case 18: return (&_kcodesel); 82 case 19: return (&_kdatasel); 83 } 84 return (NULL); 85 } 86 87 void 88 gdb_cpu_setreg(int regnum, void *val) 89 { 90 91 switch (regnum) { 92 case GDB_REG_PC: 93 kdb_thrctx->pcb_rip = *(register_t *)val; 94 if (kdb_thread == curthread) 95 kdb_frame->tf_rip = *(register_t *)val; 96 } 97 } 98 99 int 100 gdb_cpu_signal(int type, int code) 101 { 102 103 switch (type & ~T_USER) { 104 case 0: return (SIGFPE); /* Divide by zero. */ 105 case 1: return (SIGTRAP); /* Debug exception. */ 106 case 3: return (SIGTRAP); /* Breakpoint. */ 107 case 4: return (SIGSEGV); /* into instr. (overflow). */ 108 case 5: return (SIGURG); /* bound instruction. */ 109 case 6: return (SIGILL); /* Invalid opcode. */ 110 case 7: return (SIGFPE); /* Coprocessor not present. */ 111 case 8: return (SIGEMT); /* Double fault. */ 112 case 9: return (SIGSEGV); /* Coprocessor segment overrun. */ 113 case 10: return (SIGTRAP); /* Invalid TSS (also single-step). */ 114 case 11: return (SIGSEGV); /* Segment not present. */ 115 case 12: return (SIGSEGV); /* Stack exception. */ 116 case 13: return (SIGSEGV); /* General protection. */ 117 case 14: return (SIGSEGV); /* Page fault. */ 118 case 16: return (SIGEMT); /* Coprocessor error. */ 119 } 120 return (SIGEMT); 121 } 122