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mips-linux-watch.h
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1 /* Copyright (C) 2009-2015 Free Software Foundation, Inc.
2 
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.
9 
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 MIPS_LINUX_WATCH_H
19 #define MIPS_LINUX_WATCH_H 1
20 
21 #include <asm/ptrace.h>
22 #include "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 
36 };
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 
60 {
64  uint32_t num_valid;
65 } __attribute__ ((aligned (8)));
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 {
96  int len;
97  int type;
99 };
100 
101 uint32_t mips_linux_watch_get_num_valid (struct pt_watch_regs *regs);
102 uint32_t mips_linux_watch_get_irw_mask (struct pt_watch_regs *regs, int n);
104 void mips_linux_watch_set_watchlo (struct pt_watch_regs *regs, int n,
105  CORE_ADDR value);
106 uint32_t mips_linux_watch_get_watchhi (struct pt_watch_regs *regs, int n);
107 void 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);
113 uint32_t mips_linux_watch_type_to_irw (int type);
114 
115 int mips_linux_read_watch_registers (long lwpid,
117  int *watch_readback_valid, int force);
118 #endif
uint32_t mips_linux_watch_get_irw_mask(struct pt_watch_regs *regs, int n)
void mips_linux_watch_set_watchlo(struct pt_watch_regs *regs, int n, CORE_ADDR value)
uint16_t watchhi[MAX_DEBUG_REGISTER]
bfd_vma CORE_ADDR
Definition: common-types.h:41
struct mips_watchpoint * next
struct pt_watch_regs __attribute__
void mips_linux_watch_set_watchhi(struct pt_watch_regs *regs, int n, uint16_t value)
int mips_linux_watch_try_one_watch(struct pt_watch_regs *regs, CORE_ADDR addr, int len, uint32_t irw)
static struct mips_watchpoint * current_watches
uint32_t mips_linux_watch_get_watchhi(struct pt_watch_regs *regs, int n)
struct mips32_watch_regs mips32
pt_watch_style
int mips_linux_read_watch_registers(long lwpid, struct pt_watch_regs *watch_readback, int *watch_readback_valid, int force)
enum pt_watch_style style
struct mips64_watch_regs mips64
Definition: gdbtypes.h:749
static int watch_readback_valid
Definition: value.c:172
uint64_t watchlo[MAX_DEBUG_REGISTER]
uint32_t mips_linux_watch_get_num_valid(struct pt_watch_regs *regs)
#define MAX_DEBUG_REGISTER
uint16_t watchhi[MAX_DEBUG_REGISTER]
uint32_t mips_linux_watch_type_to_irw(int type)
uint32_t watchlo[MAX_DEBUG_REGISTER]
void mips_linux_watch_populate_regs(struct mips_watchpoint *current_watches, struct pt_watch_regs *regs)
CORE_ADDR mips_linux_watch_get_watchlo(struct pt_watch_regs *regs, int n)
uint16_t watch_masks[MAX_DEBUG_REGISTER]
static struct pt_watch_regs watch_readback
uint16_t watch_masks[MAX_DEBUG_REGISTER]
const ULONGEST const LONGEST len
Definition: target.h:309