2 * Copyright (c) 2015 The FreeBSD Foundation
4 * This software was developed by Semihalf under
5 * the sponsorship of the FreeBSD Foundation.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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.
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
29 #include <sys/param.h>
33 #include <vm/vm_map.h>
40 #include <ddb/db_variables.h>
42 #include <machine/cpu.h>
43 #include <machine/pcb.h>
44 #include <machine/stack.h>
45 #include <machine/vmparam.h>
48 db_frame(struct db_variable *vp, db_expr_t *valuep, int op)
52 if (kdb_frame == NULL)
55 reg = (long *)((uintptr_t)kdb_frame + (db_expr_t)vp->valuep);
63 #define DB_OFFSET(x) (db_expr_t *)offsetof(struct trapframe, x)
64 struct db_variable db_regs[] = {
65 { "spsr", DB_OFFSET(tf_spsr), db_frame },
66 { "x0", DB_OFFSET(tf_x[0]), db_frame },
67 { "x1", DB_OFFSET(tf_x[1]), db_frame },
68 { "x2", DB_OFFSET(tf_x[2]), db_frame },
69 { "x3", DB_OFFSET(tf_x[3]), db_frame },
70 { "x4", DB_OFFSET(tf_x[4]), db_frame },
71 { "x5", DB_OFFSET(tf_x[5]), db_frame },
72 { "x6", DB_OFFSET(tf_x[6]), db_frame },
73 { "x7", DB_OFFSET(tf_x[7]), db_frame },
74 { "x8", DB_OFFSET(tf_x[8]), db_frame },
75 { "x9", DB_OFFSET(tf_x[9]), db_frame },
76 { "x10", DB_OFFSET(tf_x[10]), db_frame },
77 { "x11", DB_OFFSET(tf_x[11]), db_frame },
78 { "x12", DB_OFFSET(tf_x[12]), db_frame },
79 { "x13", DB_OFFSET(tf_x[13]), db_frame },
80 { "x14", DB_OFFSET(tf_x[14]), db_frame },
81 { "x15", DB_OFFSET(tf_x[15]), db_frame },
82 { "x16", DB_OFFSET(tf_x[16]), db_frame },
83 { "x17", DB_OFFSET(tf_x[17]), db_frame },
84 { "x18", DB_OFFSET(tf_x[18]), db_frame },
85 { "x19", DB_OFFSET(tf_x[19]), db_frame },
86 { "x20", DB_OFFSET(tf_x[20]), db_frame },
87 { "x21", DB_OFFSET(tf_x[21]), db_frame },
88 { "x22", DB_OFFSET(tf_x[22]), db_frame },
89 { "x23", DB_OFFSET(tf_x[23]), db_frame },
90 { "x24", DB_OFFSET(tf_x[24]), db_frame },
91 { "x25", DB_OFFSET(tf_x[25]), db_frame },
92 { "x26", DB_OFFSET(tf_x[26]), db_frame },
93 { "x27", DB_OFFSET(tf_x[27]), db_frame },
94 { "x28", DB_OFFSET(tf_x[28]), db_frame },
95 { "x29", DB_OFFSET(tf_x[29]), db_frame },
96 { "lr", DB_OFFSET(tf_lr), db_frame },
97 { "elr", DB_OFFSET(tf_elr), db_frame },
98 { "sp", DB_OFFSET(tf_sp), db_frame },
101 struct db_variable *db_eregs = db_regs + nitems(db_regs);
104 db_show_mdpcpu(struct pcpu *pc)
109 * Read bytes from kernel address space for debugger.
112 db_read_bytes(vm_offset_t addr, size_t size, char *data)
122 prev_jb = kdb_jmpbuf(jb);
126 src = (const char *)addr;
129 * Perform a native-sized memory access, if possible. This
130 * enables reading from MMIO devices that don't support single
133 if (size == 8 && (addr & 7) == 0) {
134 tmp64 = *((const uint64_t *)src);
135 src = (const char *)&tmp64;
136 } else if (size == 4 && (addr & 3) == 0) {
137 tmp32 = *((const uint32_t *)src);
138 src = (const char *)&tmp32;
139 } else if (size == 2 && (addr & 1) == 0) {
140 tmp16 = *((const uint16_t *)src);
141 src = (const char *)&tmp16;
146 (void)kdb_jmpbuf(prev_jb);
152 * Write bytes to kernel address space for debugger.
155 db_write_bytes(vm_offset_t addr, size_t size, char *data)
163 prev_jb = kdb_jmpbuf(jb);
166 if (!arm64_get_writable_addr(addr, &addr)) {
170 for (i = 0; i < size; i++)
175 * Ensure the I & D cache are in sync if we wrote
176 * to executable memory.
178 cpu_icache_sync_range(addr, (vm_size_t)size);
181 (void)kdb_jmpbuf(prev_jb);