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mips-linux-watch.h
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1/* Copyright (C) 2009-2023 Free Software Foundation, Inc.
3 This file is part of GDB.
4
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 3 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
17
18#ifndef NAT_MIPS_LINUX_WATCH_H
19#define NAT_MIPS_LINUX_WATCH_H
20
21#include <asm/ptrace.h>
22#include "gdbsupport/break-common.h"
23
24#define MAX_DEBUG_REGISTER 8
25
26/* If macro PTRACE_GET_WATCH_REGS is not defined, kernel header doesn't
27 have hardware watchpoint-related structures. Define them below. */
28
29#ifndef PTRACE_GET_WATCH_REGS
30# define PTRACE_GET_WATCH_REGS 0xd0
31# define PTRACE_SET_WATCH_REGS 0xd1
32
37
38/* A value of zero in a watchlo indicates that it is available. */
39
41{
43 /* Lower 16 bits of watchhi. */
45 /* Valid mask and I R W bits.
46 * bit 0 -- 1 if W bit is usable.
47 * bit 1 -- 1 if R bit is usable.
48 * bit 2 -- 1 if I bit is usable.
49 * bits 3 - 11 -- Valid watchhi mask bits.
50 */
52 /* The number of valid watch register pairs. */
53 uint32_t num_valid;
54 /* There is confusion across gcc versions about structure alignment,
55 so we force 8 byte alignment for these structures so they match
56 the kernel even if it was build with a different gcc version. */
57} __attribute__ ((aligned (8)));
58
66
68{
70 union
71 {
74 };
75};
76
77#endif /* !PTRACE_GET_WATCH_REGS */
78
79#define W_BIT 0
80#define R_BIT 1
81#define I_BIT 2
82
83#define W_MASK (1 << W_BIT)
84#define R_MASK (1 << R_BIT)
85#define I_MASK (1 << I_BIT)
86
87#define IRW_MASK (I_MASK | R_MASK | W_MASK)
88
89/* We keep list of all watchpoints we should install and calculate the
90 watch register values each time the list changes. This allows for
91 easy sharing of watch registers for more than one watchpoint. */
92
94{
95 CORE_ADDR addr;
96 int len;
97 enum target_hw_bp_type type;
99};
100
101uint32_t mips_linux_watch_get_num_valid (struct pt_watch_regs *regs);
102uint32_t mips_linux_watch_get_irw_mask (struct pt_watch_regs *regs, int n);
103CORE_ADDR mips_linux_watch_get_watchlo (struct pt_watch_regs *regs, int n);
104void mips_linux_watch_set_watchlo (struct pt_watch_regs *regs, int n,
105 CORE_ADDR value);
106uint32_t mips_linux_watch_get_watchhi (struct pt_watch_regs *regs, int n);
107void mips_linux_watch_set_watchhi (struct pt_watch_regs *regs, int n,
108 uint16_t value);
110 CORE_ADDR addr, int len, uint32_t irw);
112 struct pt_watch_regs *regs);
113uint32_t mips_linux_watch_type_to_irw (enum target_hw_bp_type type);
114
115int mips_linux_read_watch_registers (long lwpid,
117 int *watch_readback_valid, int force);
118
119#endif /* NAT_MIPS_LINUX_WATCH_H */
static struct mips_watchpoint * current_watches
static int watch_readback_valid
static struct pt_watch_regs watch_readback
CORE_ADDR mips_linux_watch_get_watchlo(struct pt_watch_regs *regs, int n)
void mips_linux_watch_set_watchlo(struct pt_watch_regs *regs, int n, CORE_ADDR value)
uint32_t mips_linux_watch_get_irw_mask(struct pt_watch_regs *regs, int n)
void mips_linux_watch_set_watchhi(struct pt_watch_regs *regs, int n, uint16_t value)
struct pt_watch_regs __attribute__
uint32_t mips_linux_watch_get_num_valid(struct pt_watch_regs *regs)
uint32_t mips_linux_watch_type_to_irw(enum target_hw_bp_type type)
#define MAX_DEBUG_REGISTER
int mips_linux_watch_try_one_watch(struct pt_watch_regs *regs, CORE_ADDR addr, int len, uint32_t irw)
void mips_linux_watch_populate_regs(struct mips_watchpoint *current_watches, struct pt_watch_regs *regs)
int mips_linux_read_watch_registers(long lwpid, struct pt_watch_regs *watch_readback, int *watch_readback_valid, int force)
pt_watch_style
@ pt_watch_style_mips64
@ pt_watch_style_mips32
uint32_t mips_linux_watch_get_watchhi(struct pt_watch_regs *regs, int n)
uint32_t watchlo[MAX_DEBUG_REGISTER]
uint16_t watchhi[MAX_DEBUG_REGISTER]
uint16_t watch_masks[MAX_DEBUG_REGISTER]
uint16_t watchhi[MAX_DEBUG_REGISTER]
uint64_t watchlo[MAX_DEBUG_REGISTER]
uint16_t watch_masks[MAX_DEBUG_REGISTER]
enum target_hw_bp_type type
struct mips_watchpoint * next
struct mips32_watch_regs mips32
enum pt_watch_style style
struct mips64_watch_regs mips64
Definition value.h:130