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: releng/6.1/sys/amd64/amd64/gdb_machdep.c 158179 2006-04-30 16:44:43Z cvs2svn $");
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
52 *regsz = gdb_cpu_regsz(regnum);
53
54 if (kdb_thread == curthread) {
55 switch (regnum) {
56 case 0: return (&kdb_frame->tf_rax);
57 case 2: return (&kdb_frame->tf_rcx);
58 case 3: return (&kdb_frame->tf_rdx);
59 case 4: return (&kdb_frame->tf_rsi);
60 case 5: return (&kdb_frame->tf_rdi);
61 case 8: return (&kdb_frame->tf_r8);
62 case 9: return (&kdb_frame->tf_r9);
63 case 10: return (&kdb_frame->tf_r10);
64 case 11: return (&kdb_frame->tf_r11);
65 case 17: return (&kdb_frame->tf_rflags);
66 case 18: return (&kdb_frame->tf_cs);
67 case 19: return (&kdb_frame->tf_ss);
68 }
69 }
70 switch (regnum) {
71 case 1: return (&kdb_thrctx->pcb_rbx);
72 case 6: return (&kdb_thrctx->pcb_rbp);
73 case 7: return (&kdb_thrctx->pcb_rsp);
74 case 12: return (&kdb_thrctx->pcb_r12);
75 case 13: return (&kdb_thrctx->pcb_r13);
76 case 14: return (&kdb_thrctx->pcb_r14);
77 case 15: return (&kdb_thrctx->pcb_r15);
78 case 16: return (&kdb_thrctx->pcb_rip);
79 }
80 return (NULL);
81 }
82
83 void
84 gdb_cpu_setreg(int regnum, void *val)
85 {
86
87 switch (regnum) {
88 case GDB_REG_PC:
89 kdb_thrctx->pcb_rip = *(register_t *)val;
90 if (kdb_thread == curthread)
91 kdb_frame->tf_rip = *(register_t *)val;
92 }
93 }
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