1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2021 Mitchell Horne <mhorne@FreeBSD.org> 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #ifndef _MACHINE_GDB_MACHDEP_H_ 30 #define _MACHINE_GDB_MACHDEP_H_ 31 32 #define GDB_BUFSZ 4096 33 #define GDB_NREGS 33 34 #define GDB_REG_ZERO 0 35 #define GDB_REG_RA 1 36 #define GDB_REG_SP 2 37 #define GDB_REG_GP 3 38 #define GDB_REG_TP 4 39 #define GDB_REG_T0 5 40 #define GDB_REG_FP 8 41 #define GDB_REG_S1 9 42 #define GDB_REG_A0 10 43 #define GDB_REG_S2 18 44 #define GDB_REG_T3 28 45 #define GDB_REG_PC 32 46 #define GDB_REG_CSR_BASE 65 47 #define GDB_REG_SSTATUS (GDB_REG_CSR_BASE + 0x100) 48 #define GDB_REG_SCAUSE (GDB_REG_CSR_BASE + 0x142) 49 #define GDB_REG_STVAL (GDB_REG_CSR_BASE + 0x143) 50 _Static_assert(GDB_BUFSZ >= (GDB_NREGS * 8), "buffer fits 'g' regs"); 51 52 static __inline size_t 53 gdb_cpu_regsz(int regnum __unused) 54 { 55 56 return (8); 57 } 58 59 static __inline int 60 gdb_cpu_query(void) 61 { 62 return (0); 63 } 64 65 static __inline void * 66 gdb_begin_write(void) 67 { 68 69 return (NULL); 70 } 71 72 static __inline void 73 gdb_end_write(void *arg __unused) 74 { 75 76 } 77 78 static __inline void 79 gdb_cpu_stop_reason(int type __unused, int code __unused) 80 { 81 82 } 83 84 void *gdb_cpu_getreg(int, size_t *); 85 void gdb_cpu_setreg(int, void *); 86 int gdb_cpu_signal(int, int); 87 88 #endif /* !_MACHINE_GDB_MACHDEP_H_ */ 89