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/tmp/gdb-13.1/gdb/mips-fbsd-nat.c
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1/* Native-dependent code for FreeBSD/mips.
2
3 Copyright (C) 2017-2023 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 "fbsd-nat.h"
30#include "mips-tdep.h"
31#include "mips-fbsd-tdep.h"
32#include "inf-ptrace.h"
33
35{
36 void fetch_registers (struct regcache *, int) override;
37 void store_registers (struct regcache *, int) override;
38};
39
41
42/* Determine if PT_GETREGS fetches REGNUM. */
43
44static bool
46{
47 return (regnum >= MIPS_ZERO_REGNUM
48 && regnum <= mips_regnum (gdbarch)->pc);
49}
50
51/* Determine if PT_GETFPREGS fetches REGNUM. */
52
53static bool
55{
56 return (regnum >= mips_regnum (gdbarch)->fp0
57 && regnum <= mips_regnum (gdbarch)->fp_implementation_revision);
58}
59
60/* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
61 for all registers. */
62
63void
65{
66 pid_t pid = get_ptrace_pid (regcache->ptid ());
67
68 struct gdbarch *gdbarch = regcache->arch ();
69 if (regnum == -1 || getregs_supplies (gdbarch, regnum))
70 {
71 struct reg regs;
72
73 if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) &regs, 0) == -1)
74 perror_with_name (_("Couldn't get registers"));
75
76 mips_fbsd_supply_gregs (regcache, regnum, &regs, sizeof (register_t));
77 }
78
80 {
81 struct fpreg fpregs;
82
83 if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
84 perror_with_name (_("Couldn't get floating point status"));
85
87 sizeof (f_register_t));
88 }
89}
90
91/* Store register REGNUM back into the inferior. If REGNUM is -1, do
92 this for all registers. */
93
94void
96{
97 pid_t pid = get_ptrace_pid (regcache->ptid ());
98
99 struct gdbarch *gdbarch = regcache->arch ();
100 if (regnum == -1 || getregs_supplies (gdbarch, regnum))
101 {
102 struct reg regs;
103
104 if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) &regs, 0) == -1)
105 perror_with_name (_("Couldn't get registers"));
106
107 mips_fbsd_collect_gregs (regcache, regnum, (char *) &regs,
108 sizeof (register_t));
109
110 if (ptrace (PT_SETREGS, pid, (PTRACE_TYPE_ARG3) &regs, 0) == -1)
111 perror_with_name (_("Couldn't write registers"));
112 }
113
114 if (regnum == -1 || getfpregs_supplies (gdbarch, regnum))
115 {
116 struct fpreg fpregs;
117
118 if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
119 perror_with_name (_("Couldn't get floating point status"));
120
121 mips_fbsd_collect_fpregs (regcache, regnum, (char *) &fpregs,
122 sizeof (f_register_t));
123
124 if (ptrace (PT_SETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
125 perror_with_name (_("Couldn't write floating point status"));
126 }
127}
128
130void
132{
134}
int regnum
Definition: aarch64-tdep.c:68
gdbarch * arch() const
Definition: regcache.c:230
ptid_t ptid() const
Definition: regcache.h:407
#define PTRACE_TYPE_ARG3
Definition: config.h:663
#define ptrace(request, pid, addr, data)
Definition: gdb_ptrace.h:141
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:1792
void add_inf_child_target(inf_child_target *target)
Definition: inf-child.c:418
pid_t get_ptrace_pid(ptid_t ptid)
Definition: inf-ptrace.c:238
void _initialize_mips_fbsd_nat()
static mips_fbsd_nat_target the_mips_fbsd_nat_target
Definition: mips-fbsd-nat.c:40
static bool getfpregs_supplies(struct gdbarch *gdbarch, int regnum)
Definition: mips-fbsd-nat.c:54
static bool getregs_supplies(struct gdbarch *gdbarch, int regnum)
Definition: mips-fbsd-nat.c:45
void mips_fbsd_supply_gregs(struct regcache *regcache, int regnum, const void *gregs, size_t regsize)
void mips_fbsd_collect_gregs(const struct regcache *regcache, int regnum, void *gregs, size_t regsize)
void mips_fbsd_collect_fpregs(const struct regcache *regcache, int regnum, void *fpregs, size_t regsize)
void mips_fbsd_supply_fpregs(struct regcache *regcache, int regnum, const void *fpregs, size_t regsize)
@ MIPS_ZERO_REGNUM
Definition: mips-tdep.h:135
void fetch_registers(struct regcache *, int) override
Definition: mips-fbsd-nat.c:64
void store_registers(struct regcache *, int) override
Definition: mips-fbsd-nat.c:95
void perror_with_name(const char *string)
Definition: utils.c:643