GDB (xrefs)
/tmp/gdb-7.10/gdb/mipsnbsd-nat.c
Go to the documentation of this file.
1 /* Native-dependent code for MIPS systems running NetBSD.
2 
3  Copyright (C) 2000-2015 Free Software Foundation, Inc.
4 
5  This file is part of GDB.
6 
7  This program is free software; you can redistribute it and/or modify
8  it under the terms of the GNU General Public License as published by
9  the Free Software Foundation; either version 3 of the License, or
10  (at your option) any later version.
11 
12  This program is distributed in the hope that it will be useful,
13  but WITHOUT ANY WARRANTY; without even the implied warranty of
14  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15  GNU General Public License for more details.
16 
17  You should have received a copy of the GNU General Public License
18  along with this program. If not, see <http://www.gnu.org/licenses/>. */
19 
20 #include "defs.h"
21 #include "inferior.h"
22 #include "regcache.h"
23 #include "target.h"
24 
25 #include <sys/types.h>
26 #include <sys/ptrace.h>
27 #include <machine/reg.h>
28 
29 #include "mips-tdep.h"
30 #include "mipsnbsd-tdep.h"
31 #include "inf-ptrace.h"
32 
33 /* Determine if PT_GETREGS fetches this register. */
34 static int
35 getregs_supplies (struct gdbarch *gdbarch, int regno)
36 {
37  return ((regno) >= MIPS_ZERO_REGNUM
38  && (regno) <= gdbarch_pc_regnum (gdbarch));
39 }
40 
41 static void
43  struct regcache *regcache, int regno)
44 {
45  struct gdbarch *gdbarch = get_regcache_arch (regcache);
46  if (regno == -1 || getregs_supplies (gdbarch, regno))
47  {
48  struct reg regs;
49 
50  if (ptrace (PT_GETREGS, ptid_get_pid (inferior_ptid),
51  (PTRACE_TYPE_ARG3) &regs, 0) == -1)
52  perror_with_name (_("Couldn't get registers"));
53 
54  mipsnbsd_supply_reg (regcache, (char *) &regs, regno);
55  if (regno != -1)
56  return;
57  }
58 
59  if (regno == -1
60  || regno >= gdbarch_fp0_regnum (get_regcache_arch (regcache)))
61  {
62  struct fpreg fpregs;
63 
64  if (ptrace (PT_GETFPREGS, ptid_get_pid (inferior_ptid),
65  (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
66  perror_with_name (_("Couldn't get floating point status"));
67 
68  mipsnbsd_supply_fpreg (regcache, (char *) &fpregs, regno);
69  }
70 }
71 
72 static void
74  struct regcache *regcache, int regno)
75 {
76  struct gdbarch *gdbarch = get_regcache_arch (regcache);
77  if (regno == -1 || getregs_supplies (gdbarch, regno))
78  {
79  struct reg regs;
80 
81  if (ptrace (PT_GETREGS, ptid_get_pid (inferior_ptid),
82  (PTRACE_TYPE_ARG3) &regs, 0) == -1)
83  perror_with_name (_("Couldn't get registers"));
84 
85  mipsnbsd_fill_reg (regcache, (char *) &regs, regno);
86 
87  if (ptrace (PT_SETREGS, ptid_get_pid (inferior_ptid),
88  (PTRACE_TYPE_ARG3) &regs, 0) == -1)
89  perror_with_name (_("Couldn't write registers"));
90 
91  if (regno != -1)
92  return;
93  }
94 
95  if (regno == -1
96  || regno >= gdbarch_fp0_regnum (get_regcache_arch (regcache)))
97  {
98  struct fpreg fpregs;
99 
100  if (ptrace (PT_GETFPREGS, ptid_get_pid (inferior_ptid),
101  (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
102  perror_with_name (_("Couldn't get floating point status"));
103 
104  mipsnbsd_fill_fpreg (regcache, (char *) &fpregs, regno);
105 
106  if (ptrace (PT_SETFPREGS, ptid_get_pid (inferior_ptid),
107  (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
108  perror_with_name (_("Couldn't write floating point status"));
109  }
110 }
111 
112 
113 /* Provide a prototype to silence -Wmissing-prototypes. */
114 void _initialize_mipsnbsd_nat (void);
115 
116 void
118 {
119  struct target_ops *t;
120 
121  t = inf_ptrace_target ();
124  add_target (t);
125 }
void add_target(struct target_ops *t)
Definition: target.c:395
void _initialize_mipsnbsd_nat(void)
Definition: mipsnbsd-nat.c:117
struct gdbarch * get_regcache_arch(const struct regcache *regcache)
Definition: regcache.c:297
#define _(String)
Definition: gdb_locale.h:40
struct target_ops * inf_ptrace_target(void)
Definition: inf-ptrace.c:668
PTRACE_TYPE_RET ptrace()
void mipsnbsd_fill_fpreg(const struct regcache *regcache, char *fpregs, int regno)
static int getregs_supplies(struct gdbarch *gdbarch, int regno)
Definition: mipsnbsd-nat.c:35
static void mipsnbsd_fetch_inferior_registers(struct target_ops *ops, struct regcache *regcache, int regno)
Definition: mipsnbsd-nat.c:42
Definition: regdef.h:22
int ptid_get_pid(ptid_t ptid)
Definition: ptid.c:52
static void mipsnbsd_store_inferior_registers(struct target_ops *ops, struct regcache *regcache, int regno)
Definition: mipsnbsd-nat.c:73
void(* to_fetch_registers)(struct target_ops *, struct regcache *, int) TARGET_DEFAULT_IGNORE()
Definition: target.h:472
void void void void void void void void void perror_with_name(const char *string) ATTRIBUTE_NORETURN
Definition: utils.c:979
void mipsnbsd_supply_reg(struct regcache *regcache, const char *regs, int regno)
void mipsnbsd_supply_fpreg(struct regcache *regcache, const char *fpregs, int regno)
int gdbarch_fp0_regnum(struct gdbarch *gdbarch)
Definition: gdbarch.c:2032
ptid_t inferior_ptid
Definition: infcmd.c:124
void mipsnbsd_fill_reg(const struct regcache *regcache, char *regs, int regno)
int gdbarch_pc_regnum(struct gdbarch *gdbarch)
Definition: gdbarch.c:1998
#define PTRACE_TYPE_ARG3
Definition: config.h:658
void(* to_store_registers)(struct target_ops *, struct regcache *, int) TARGET_DEFAULT_NORETURN(noprocess())
Definition: target.h:474