1 /* $NetBSD: db_machdep.h,v 1.29 2015/06/06 22:19:07 matt Exp $ */
2
3 /*
4 * Copyright (c) 1997 Jonathan Stone (hereinafter referred to as the author)
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
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 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by Jonathan Stone for
18 * the NetBSD Project.
19 * 4. The name of the author may not be used to endorse or promote products
20 * derived from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34 #ifndef _MIPS_DB_MACHDEP_H_
35 #define _MIPS_DB_MACHDEP_H_
36
37 #include <uvm/uvm_param.h> /* XXX boolean_t */
38 #include <mips/trap.h> /* T_BREAK */
39 #include <mips/reg.h> /* register state */
40 #include <mips/regnum.h> /* symbolic register indices */
41 #include <mips/pcb.h>
42
43 #define DB_ELF_SYMBOLS
44 #ifndef DB_ELFSIZE
45 #define DB_ELFSIZE 32
46 #endif
47
48 typedef vaddr_t db_addr_t; /* address - unsigned */
49 #ifdef __mips_n32
50 #define DDB_EXPR_FMT "ll" /* expression is long long */
51 typedef int64_t db_expr_t; /* expression - signed */
52 #else
53 #define DDB_EXPR_FMT "l" /* expression is long */
54 typedef long db_expr_t; /* expression - signed */
55 #endif
56
57 typedef struct reg db_regs_t;
58
59 extern db_regs_t ddb_regs; /* register state */
60 #define DDB_REGS (&ddb_regs)
61
62 #define PC_REGS(regs) ((regs)->r_regs[_R_PC])
63
64 #define PC_ADVANCE(regs) do { \
65 if ((db_get_value((regs)->r_regs[_R_PC], sizeof(int), false) &\
66 0xfc00003f) == 0xd) \
67 (regs)->r_regs[_R_PC] += BKPT_SIZE; \
68 } while(0)
69
70 /* Similar to PC_ADVANCE(), except only advance on cpu_Debugger()'s bpt */
71 #define PC_BREAK_ADVANCE(regs) do { \
72 if (db_get_value((regs)->r_regs[_R_PC], sizeof(int), false) == 0xd) \
73 (regs)->r_regs[_R_PC] += BKPT_SIZE; \
74 } while(0)
75
76 #define BKPT_ADDR(addr) (addr) /* breakpoint address */
77 #define BKPT_INST 0x0001000D
78 #define BKPT_SIZE (4) /* size of breakpoint inst */
79 #define BKPT_SET(inst, addr) (BKPT_INST)
80
81 #define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BREAK)
82 #define IS_WATCHPOINT_TRAP(type, code) (0) /* XXX mips3 watchpoint */
83
84 /*
85 * Interface to disassembly (shared with mdb)
86 */
87 db_addr_t db_disasm_insn(int insn, db_addr_t loc, bool altfmt);
88
89
90 /*
91 * Entrypoints to DDB for kernel, keyboard drivers, init hook
92 */
93 void kdb_kbd_trap(db_regs_t *);
94 int kdb_trap(int type, struct reg *);
95
96 static inline void
db_set_ddb_regs(int type,struct reg * regs)97 db_set_ddb_regs(int type, struct reg *regs)
98 {
99 ddb_regs = *regs;
100 }
101
102
103 /*
104 * Constants for KGDB.
105 */
106 typedef mips_reg_t kgdb_reg_t;
107 #define KGDB_NUMREGS 90
108 #define KGDB_BUFLEN 1024
109
110 /*
111 * MIPS cpus have no hardware single-step.
112 */
113 #define SOFTWARE_SSTEP
114
115 #define inst_trap_return(ins) ((ins)&0)
116
117 bool inst_branch(int inst);
118 bool inst_call(int inst);
119 bool inst_return(int inst);
120 bool inst_load(int inst);
121 bool inst_store(int inst);
122 bool inst_unconditional_flow_transfer(int inst);
123 db_addr_t branch_taken(int inst, db_addr_t pc, db_regs_t *regs);
124 db_addr_t next_instr_address(db_addr_t pc, bool bd);
125
126 bool ddb_running_on_this_cpu_p(void);
127 bool ddb_running_on_any_cpu_p(void);
128 void db_resume_others(void);
129
130 /*
131 * We have machine-dependent commands.
132 */
133 #define DB_MACHINE_COMMANDS
134
135 #endif /* _MIPS_DB_MACHDEP_H_ */
136