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/tmp/gdb-7.10/gdb/vaxbsd-nat.c
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1 /* Native-dependent code for modern VAX BSD's.
2 
3  Copyright (C) 2004-2015 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 "vax-tdep.h"
30 #include "inf-ptrace.h"
31 
32 /* Supply the general-purpose registers stored in GREGS to REGCACHE. */
33 
34 static void
35 vaxbsd_supply_gregset (struct regcache *regcache, const void *gregs)
36 {
37  const gdb_byte *regs = gregs;
38  int regnum;
39 
40  for (regnum = 0; regnum < VAX_NUM_REGS; regnum++)
41  regcache_raw_supply (regcache, regnum, regs + regnum * 4);
42 }
43 
44 /* Collect the general-purpose registers from REGCACHE and store them
45  in GREGS. */
46 
47 static void
49  void *gregs, int regnum)
50 {
51  gdb_byte *regs = gregs;
52  int i;
53 
54  for (i = 0; i <= VAX_NUM_REGS; i++)
55  {
56  if (regnum == -1 || regnum == i)
57  regcache_raw_collect (regcache, i, regs + i * 4);
58  }
59 }
60 
61 
62 /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
63  for all registers. */
64 
65 static void
67  struct regcache *regcache, int regnum)
68 {
69  struct reg regs;
70 
71  if (ptrace (PT_GETREGS, ptid_get_pid (inferior_ptid),
72  (PTRACE_TYPE_ARG3) &regs, 0) == -1)
73  perror_with_name (_("Couldn't get registers"));
74 
75  vaxbsd_supply_gregset (regcache, &regs);
76 }
77 
78 /* Store register REGNUM back into the inferior. If REGNUM is -1, do
79  this for all registers. */
80 
81 static void
83  struct regcache *regcache, int regnum)
84 {
85  struct reg regs;
86 
87  if (ptrace (PT_GETREGS, ptid_get_pid (inferior_ptid),
88  (PTRACE_TYPE_ARG3) &regs, 0) == -1)
89  perror_with_name (_("Couldn't get registers"));
90 
91  vaxbsd_collect_gregset (regcache, &regs, regnum);
92 
93  if (ptrace (PT_SETREGS, ptid_get_pid (inferior_ptid),
94  (PTRACE_TYPE_ARG3) &regs, 0) == -1)
95  perror_with_name (_("Couldn't write registers"));
96 }
97 
98 
99 /* Support for debugging kernel virtual memory images. */
100 
101 #include <machine/pcb.h>
102 
103 #include "bsd-kvm.h"
104 
105 static int
106 vaxbsd_supply_pcb (struct regcache *regcache, struct pcb *pcb)
107 {
108  int regnum;
109 
110  /* The following is true for OpenBSD 3.5:
111 
112  The pcb contains the register state at the context switch inside
113  cpu_switch(). */
114 
115  /* The stack pointer shouldn't be zero. */
116  if (pcb->KSP == 0)
117  return 0;
118 
119  for (regnum = VAX_R0_REGNUM; regnum < VAX_AP_REGNUM; regnum++)
120  regcache_raw_supply (regcache, regnum, &pcb->R[regnum - VAX_R0_REGNUM]);
121  regcache_raw_supply (regcache, VAX_AP_REGNUM, &pcb->AP);
122  regcache_raw_supply (regcache, VAX_FP_REGNUM, &pcb->FP);
123  regcache_raw_supply (regcache, VAX_SP_REGNUM, &pcb->KSP);
124  regcache_raw_supply (regcache, VAX_PC_REGNUM, &pcb->PC);
125  regcache_raw_supply (regcache, VAX_PS_REGNUM, &pcb->PSL);
126 
127  return 1;
128 }
129 
130 
131 /* Provide a prototype to silence -Wmissing-prototypes. */
132 void _initialize_vaxbsd_nat (void);
133 
134 void
136 {
137  struct target_ops *t;
138 
139  t = inf_ptrace_target ();
142  add_target (t);
143 
144  /* Support debugging kernel virtual memory images. */
146 }
void add_target(struct target_ops *t)
Definition: target.c:395
static int vaxbsd_supply_pcb(struct regcache *regcache, struct pcb *pcb)
Definition: vaxbsd-nat.c:106
static void vaxbsd_fetch_inferior_registers(struct target_ops *ops, struct regcache *regcache, int regnum)
Definition: vaxbsd-nat.c:66
void _initialize_vaxbsd_nat(void)
Definition: vaxbsd-nat.c:135
#define _(String)
Definition: gdb_locale.h:40
struct target_ops * inf_ptrace_target(void)
Definition: inf-ptrace.c:668
PTRACE_TYPE_RET ptrace()
static void vaxbsd_store_inferior_registers(struct target_ops *ops, struct regcache *regcache, int regnum)
Definition: vaxbsd-nat.c:82
#define VAX_NUM_REGS
Definition: vax-tdep.h:37
static void vaxbsd_collect_gregset(const struct regcache *regcache, void *gregs, int regnum)
Definition: vaxbsd-nat.c:48
int regnum
Definition: aarch64-tdep.c:69
Definition: regdef.h:22
int ptid_get_pid(ptid_t ptid)
Definition: ptid.c:52
bfd_byte gdb_byte
Definition: common-types.h:38
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
ptid_t inferior_ptid
Definition: infcmd.c:124
static void vaxbsd_supply_gregset(struct regcache *regcache, const void *gregs)
Definition: vaxbsd-nat.c:35
void regcache_raw_supply(struct regcache *regcache, int regnum, const void *buf)
Definition: regcache.c:1041
void regcache_raw_collect(const struct regcache *regcache, int regnum, void *buf)
Definition: regcache.c:1071
#define PTRACE_TYPE_ARG3
Definition: config.h:658
void bsd_kvm_add_target(int(*supply_pcb)(struct regcache *, struct pcb *))
Definition: bsd-kvm.c:351
void(* to_store_registers)(struct target_ops *, struct regcache *, int) TARGET_DEFAULT_NORETURN(noprocess())
Definition: target.h:474