1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2020 The FreeBSD Foundation
5 *
6 * This software was developed by Mitchell Horne under sponsorship from
7 * the FreeBSD Foundation.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
31 #ifndef _MACHINE_GDB_MACHDEP_H_
32 #define _MACHINE_GDB_MACHDEP_H_
33
34 #define GDB_BUFSZ 4096
35 #define GDB_NREGS 68
36 #define GDB_REG_X0 0
37 #define GDB_REG_X19 19
38 #define GDB_REG_X29 29
39 #define GDB_REG_LR 30
40 #define GDB_REG_SP 31
41 #define GDB_REG_PC 32
42 #define GDB_REG_CSPR 33
43 #define GDB_REG_V0 34
44 #define GDB_REG_V31 65
45 #define GDB_REG_FPSR 66
46 #define GDB_REG_FPCR 67
47 _Static_assert(GDB_BUFSZ >= (GDB_NREGS * 16), "buffer fits 'g' regs");
48
49 static __inline size_t
gdb_cpu_regsz(int regnum)50 gdb_cpu_regsz(int regnum)
51 {
52 if (regnum == GDB_REG_CSPR || regnum == GDB_REG_FPSR ||
53 regnum == GDB_REG_FPCR)
54 return (4);
55 else if (regnum >= GDB_REG_V0 && regnum <= GDB_REG_V31)
56 return (16);
57
58 return (8);
59 }
60
61 static __inline int
gdb_cpu_query(void)62 gdb_cpu_query(void)
63 {
64 return (0);
65 }
66
67 static __inline void *
gdb_begin_write(void)68 gdb_begin_write(void)
69 {
70 return (NULL);
71 }
72
73 static __inline void
gdb_end_write(void * arg __unused)74 gdb_end_write(void *arg __unused)
75 {
76 }
77
78 void *gdb_cpu_getreg(int, size_t *);
79 void gdb_cpu_setreg(int, void *);
80 int gdb_cpu_signal(int, int);
81 void gdb_cpu_stop_reason(int, int);
82
83 #endif /* !_MACHINE_GDB_MACHDEP_H_ */
84