GDB (xrefs)

/tmp/gdb-8.1/gdb/mips-nbsd-nat.c
Go to the documentation of this file.
1 /* Native-dependent code for MIPS systems running NetBSD.
2
3 Copyright (C) 2000-2018 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 "mips-nbsd-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
42 mipsnbsd_fetch_inferior_registers (struct target_ops *ops,
43 struct regcache *regcache, int regno)
44 {
45 pid_t pid = ptid_get_pid (regcache_get_ptid (regcache));
46
47 struct gdbarch *gdbarch = regcache->arch ();
48 if (regno == -1 || getregs_supplies (gdbarch, regno))
49 {
50 struct reg regs;
51
52 if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) &regs, 0) == -1)
53 perror_with_name (_("Couldn't get registers"));
54
55 mipsnbsd_supply_reg (regcache, (char *) &regs, regno);
56 if (regno != -1)
57 return;
58 }
59
60 if (regno == -1
61 || regno >= gdbarch_fp0_regnum (regcache->arch ()))
62 {
63 struct fpreg fpregs;
64
65 if (ptrace (PT_GETFPREGS, pid, (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
73 mipsnbsd_store_inferior_registers (struct target_ops *ops,
74 struct regcache *regcache, int regno)
75 {
76 pid_t pid = ptid_get_pid (regcache_get_ptid (regcache));
77
78 struct gdbarch *gdbarch = regcache->arch ();
79 if (regno == -1 || getregs_supplies (gdbarch, regno))
80 {
81 struct reg regs;
82
83 if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) &regs, 0) == -1)
84 perror_with_name (_("Couldn't get registers"));
85
86 mipsnbsd_fill_reg (regcache, (char *) &regs, regno);
87
88 if (ptrace (PT_SETREGS, pid, (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 (regcache->arch ()))
97 {
98 struct fpreg fpregs;
99
100 if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
101 perror_with_name (_("Couldn't get floating point status"));
102
103 mipsnbsd_fill_fpreg (regcache, (char *) &fpregs, regno);
104
105 if (ptrace (PT_SETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
106 perror_with_name (_("Couldn't write floating point status"));
107 }
108 }
109
110 void
111 _initialize_mipsnbsd_nat (void)
112 {
113 struct target_ops *t;
114
115 t = inf_ptrace_target ();
116 t->to_fetch_registers = mipsnbsd_fetch_inferior_registers;
117 t->to_store_registers = mipsnbsd_store_inferior_registers;
118 add_target (t);
119 }
gdbarch
Definition: gdbarch.c:127
add_target
void add_target(struct target_ops *t)
Definition: target.c:395
ptid_get_pid
int ptid_get_pid(const ptid_t &ptid)
Definition: ptid.c:47
pid
mach_port_t mach_port_t name mach_port_t mach_port_t name kern_return_t int int rusage_t pid_t pid
Definition: gnu-nat.c:1824
regcache_get_ptid
ptid_t regcache_get_ptid(const struct regcache *regcache)
Definition: regcache.c:229
getregs_supplies
static int getregs_supplies(struct gdbarch *gdbarch, int regno)
Definition: mips-nbsd-nat.c:35
mips-nbsd-tdep.h
_
#define _(String)
Definition: gdb_locale.h:35
inf_ptrace_target
struct target_ops * inf_ptrace_target(void)
Definition: inf-ptrace.c:676
defs.h
ptrace
PTRACE_TYPE_RET ptrace()
inf-ptrace.h
target_ops
Definition: target.h:412
regcache.h
inferior.h
mipsnbsd_store_inferior_registers
static void mipsnbsd_store_inferior_registers(struct target_ops *ops, struct regcache *regcache, int regno)
Definition: mips-nbsd-nat.c:73
_initialize_mipsnbsd_nat
void _initialize_mipsnbsd_nat(void)
Definition: mips-nbsd-nat.c:111
reg
Definition: regdef.h:22
mipsnbsd_supply_reg
void mipsnbsd_supply_reg(struct regcache *regcache, const char *regs, int regno)
Definition: mips-nbsd-tdep.c:138
MIPS_ZERO_REGNUM
Definition: mips-tdep.h:125
target_ops::to_fetch_registers
void(* to_fetch_registers)(struct target_ops *, struct regcache *, int) TARGET_DEFAULT_IGNORE()
Definition: target.h:457
perror_with_name
void void void void void void void void void perror_with_name(const char *string) ATTRIBUTE_NORETURN
Definition: utils.c:692
gdbarch_fp0_regnum
int gdbarch_fp0_regnum(struct gdbarch *gdbarch)
Definition: gdbarch.c:2197
regcache::arch
gdbarch * arch() const
Definition: regcache.c:221
mipsnbsd_fetch_inferior_registers
static void mipsnbsd_fetch_inferior_registers(struct target_ops *ops, struct regcache *regcache, int regno)
Definition: mips-nbsd-nat.c:42
target.h
mipsnbsd_supply_fpreg
void mipsnbsd_supply_fpreg(struct regcache *regcache, const char *fpregs, int regno)
Definition: mips-nbsd-tdep.c:170
mips-tdep.h
regcache
Definition: regcache.h:232
mipsnbsd_fill_fpreg
void mipsnbsd_fill_fpreg(const struct regcache *regcache, char *fpregs, int regno)
Definition: mips-nbsd-tdep.c:194
gdbarch_pc_regnum
int gdbarch_pc_regnum(struct gdbarch *gdbarch)
Definition: gdbarch.c:2163
PTRACE_TYPE_ARG3
#define PTRACE_TYPE_ARG3
Definition: config.h:642
mipsnbsd_fill_reg
void mipsnbsd_fill_reg(const struct regcache *regcache, char *regs, int regno)
Definition: mips-nbsd-tdep.c:157
target_ops::to_store_registers
void(* to_store_registers)(struct target_ops *, struct regcache *, int) TARGET_DEFAULT_NORETURN(noprocess())
Definition: target.h:459