2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2004 Marcel Moolenaar
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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.
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.
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
32 #include <sys/param.h>
33 #include <sys/systm.h>
35 #include <sys/kernel.h>
37 #include <sys/signal.h>
39 #include <machine/frame.h>
40 #include <machine/gdb_machdep.h>
41 #include <machine/pcb.h>
42 #include <machine/psl.h>
43 #include <machine/reg.h>
44 #include <machine/trap.h>
45 #include <machine/frame.h>
46 #include <machine/endian.h>
51 gdb_cpu_getreg(int regnum, size_t *regsz)
53 static uint32_t _kcodesel = GSEL(GCODE_SEL, SEL_KPL);
54 static uint32_t _kdatasel = GSEL(GDATA_SEL, SEL_KPL);
56 *regsz = gdb_cpu_regsz(regnum);
58 if (kdb_thread == curthread) {
60 case 0: return (&kdb_frame->tf_rax);
61 case 2: return (&kdb_frame->tf_rcx);
62 case 3: return (&kdb_frame->tf_rdx);
63 case 4: return (&kdb_frame->tf_rsi);
64 case 5: return (&kdb_frame->tf_rdi);
65 case 8: return (&kdb_frame->tf_r8);
66 case 9: return (&kdb_frame->tf_r9);
67 case 10: return (&kdb_frame->tf_r10);
68 case 11: return (&kdb_frame->tf_r11);
69 case 17: return (&kdb_frame->tf_rflags);
70 case 18: return (&kdb_frame->tf_cs);
71 case 19: return (&kdb_frame->tf_ss);
75 case 1: return (&kdb_thrctx->pcb_rbx);
76 case 6: return (&kdb_thrctx->pcb_rbp);
77 case 7: return (&kdb_thrctx->pcb_rsp);
78 case 12: return (&kdb_thrctx->pcb_r12);
79 case 13: return (&kdb_thrctx->pcb_r13);
80 case 14: return (&kdb_thrctx->pcb_r14);
81 case 15: return (&kdb_thrctx->pcb_r15);
82 case 16: return (&kdb_thrctx->pcb_rip);
83 case 18: return (&_kcodesel);
84 case 19: return (&_kdatasel);
90 gdb_cpu_setreg(int regnum, void *val)
95 kdb_thrctx->pcb_rip = *(register_t *)val;
96 if (kdb_thread == curthread)
97 kdb_frame->tf_rip = *(register_t *)val;
102 gdb_cpu_signal(int type, int code)
105 switch (type & ~T_USER) {
106 case 0: return (SIGFPE); /* Divide by zero. */
107 case 1: return (SIGTRAP); /* Debug exception. */
108 case 3: return (SIGTRAP); /* Breakpoint. */
109 case 4: return (SIGSEGV); /* into instr. (overflow). */
110 case 5: return (SIGURG); /* bound instruction. */
111 case 6: return (SIGILL); /* Invalid opcode. */
112 case 7: return (SIGFPE); /* Coprocessor not present. */
113 case 8: return (SIGEMT); /* Double fault. */
114 case 9: return (SIGSEGV); /* Coprocessor segment overrun. */
115 case 10: return (SIGTRAP); /* Invalid TSS (also single-step). */
116 case 11: return (SIGSEGV); /* Segment not present. */
117 case 12: return (SIGSEGV); /* Stack exception. */
118 case 13: return (SIGSEGV); /* General protection. */
119 case 14: return (SIGSEGV); /* Page fault. */
120 case 16: return (SIGEMT); /* Coprocessor error. */