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/tmp/gdb-7.10/gdb/sparc64nbsd-nat.c
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1 /* Native-dependent code for NetBSD/sparc64.
2 
3  Copyright (C) 2003-2015 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 "gdbcore.h"
22 #include "regcache.h"
23 #include "target.h"
24 
25 #include "sparc64-tdep.h"
26 #include "sparc-nat.h"
27 
28 /* NetBSD is different from the other OSes that support both SPARC and
29  UltraSPARC in that the result of ptrace(2) depends on whether the
30  traced process is 32-bit or 64-bit. */
31 
32 static void
34  struct regcache *regcache,
35  int regnum, const void *gregs)
36 {
37  int sparc32 = (gdbarch_ptr_bit (get_regcache_arch (regcache)) == 32);
38 
39  if (sparc32)
40  sparc32_supply_gregset (&sparc32nbsd_gregmap, regcache, regnum, gregs);
41  else
42  sparc64_supply_gregset (&sparc64nbsd_gregmap, regcache, regnum, gregs);
43 }
44 
45 static void
47  const struct regcache *regcache,
48  int regnum, void *gregs)
49 {
50  int sparc32 = (gdbarch_ptr_bit (get_regcache_arch (regcache)) == 32);
51 
52  if (sparc32)
53  sparc32_collect_gregset (&sparc32nbsd_gregmap, regcache, regnum, gregs);
54  else
55  sparc64_collect_gregset (&sparc64nbsd_gregmap, regcache, regnum, gregs);
56 }
57 
58 static void
60  struct regcache *regcache,
61  int regnum, const void *fpregs)
62 {
63  int sparc32 = (gdbarch_ptr_bit (get_regcache_arch (regcache)) == 32);
64 
65  if (sparc32)
66  sparc32_supply_fpregset (&sparc32_bsd_fpregmap, regcache, regnum, fpregs);
67  else
68  sparc64_supply_fpregset (&sparc64_bsd_fpregmap, regcache, regnum, fpregs);
69 }
70 
71 static void
73  const struct regcache *regcache,
74  int regnum, void *fpregs)
75 {
76  int sparc32 = (gdbarch_ptr_bit (get_regcache_arch (regcache)) == 32);
77 
78  if (sparc32)
79  sparc32_collect_fpregset (&sparc32_bsd_fpregmap, regcache, regnum, fpregs);
80  else
81  sparc64_collect_fpregset (&sparc64_bsd_fpregmap, regcache, regnum, fpregs);
82 }
83 
84 /* Determine whether `gregset_t' contains register REGNUM. */
85 
86 static int
88 {
89  if (gdbarch_ptr_bit (gdbarch) == 32)
90  return sparc32_gregset_supplies_p (gdbarch, regnum);
91 
92  /* Integer registers. */
93  if ((regnum >= SPARC_G1_REGNUM && regnum <= SPARC_G7_REGNUM)
94  || (regnum >= SPARC_O0_REGNUM && regnum <= SPARC_O7_REGNUM)
95  || (regnum >= SPARC_L0_REGNUM && regnum <= SPARC_L7_REGNUM)
96  || (regnum >= SPARC_I0_REGNUM && regnum <= SPARC_I7_REGNUM))
97  return 1;
98 
99  /* Control registers. */
100  if (regnum == SPARC64_PC_REGNUM
101  || regnum == SPARC64_NPC_REGNUM
102  || regnum == SPARC64_STATE_REGNUM
103  || regnum == SPARC64_Y_REGNUM)
104  return 1;
105 
106  return 0;
107 }
108 
109 /* Determine whether `fpregset_t' contains register REGNUM. */
110 
111 static int
113 {
114  if (gdbarch_ptr_bit (gdbarch) == 32)
115  return sparc32_fpregset_supplies_p (gdbarch, regnum);
116 
117  /* Floating-point registers. */
118  if ((regnum >= SPARC_F0_REGNUM && regnum <= SPARC_F31_REGNUM)
119  || (regnum >= SPARC64_F32_REGNUM && regnum <= SPARC64_F62_REGNUM))
120  return 1;
121 
122  /* Control registers. */
123  if (regnum == SPARC64_FSR_REGNUM)
124  return 1;
125 
126  return 0;
127 }
128 
129 
130 /* Support for debugging kernel virtual memory images. */
131 
132 #include <sys/types.h>
133 #include <machine/pcb.h>
134 
135 #include "bsd-kvm.h"
136 
137 static int
138 sparc64nbsd_supply_pcb (struct regcache *regcache, struct pcb *pcb)
139 {
140  u_int64_t state;
141  int regnum;
142 
143  /* The following is true for NetBSD 1.6.2:
144 
145  The pcb contains %sp and %pc, %pstate and %cwp. From this
146  information we reconstruct the register state as it would look
147  when we just returned from cpu_switch(). */
148 
149  /* The stack pointer shouldn't be zero. */
150  if (pcb->pcb_sp == 0)
151  return 0;
152 
153  /* If the program counter is zero, this is probably a core dump, and
154  we can get %pc from the stack. */
155  if (pcb->pcb_pc == 0)
156  read_memory(pcb->pcb_sp + BIAS - 176 + (11 * 8),
157  (gdb_byte *)&pcb->pcb_pc, sizeof pcb->pcb_pc);
158 
159  regcache_raw_supply (regcache, SPARC_SP_REGNUM, &pcb->pcb_sp);
160  regcache_raw_supply (regcache, SPARC64_PC_REGNUM, &pcb->pcb_pc);
161 
162  state = pcb->pcb_pstate << 8 | pcb->pcb_cwp;
163  regcache_raw_supply (regcache, SPARC64_STATE_REGNUM, &state);
164 
165  sparc_supply_rwindow (regcache, pcb->pcb_sp, -1);
166 
167  return 1;
168 }
169 
170 
171 /* Provide a prototype to silence -Wmissing-prototypes. */
172 void _initialize_sparc64nbsd_nat (void);
173 
174 void
176 {
183 
184  /* We've got nothing to add to the generic SPARC target. */
186 
187  /* Support debugging kernel virtual memory images. */
189 }
int sparc32_gregset_supplies_p(struct gdbarch *gdbarch, int regnum)
Definition: sparc-nat.c:98
void add_target(struct target_ops *t)
Definition: target.c:395
void sparc64_collect_fpregset(const struct sparc_fpregmap *fpregmap, const struct regcache *regcache, int regnum, void *fpregs)
void sparc32_supply_gregset(const struct sparc_gregmap *gregmap, struct regcache *regcache, int regnum, const void *gregs)
Definition: sparc-tdep.c:1894
struct gdbarch * get_regcache_arch(const struct regcache *regcache)
Definition: regcache.c:297
static void sparc64nbsd_collect_gregset(const struct sparc_gregmap *gregmap, const struct regcache *regcache, int regnum, void *gregs)
int gdbarch_ptr_bit(struct gdbarch *gdbarch)
Definition: gdbarch.c:1690
#define BIAS
Definition: sparc-tdep.c:70
struct target_ops * sparc_target(void)
Definition: sparc-nat.c:333
void _initialize_sparc64nbsd_nat(void)
int sparc32_fpregset_supplies_p(struct gdbarch *gdbarch, int regnum)
Definition: sparc-nat.c:120
void sparc32_collect_fpregset(const struct sparc_fpregmap *fpregmap, const struct regcache *regcache, int regnum, void *fpregs)
Definition: sparc-tdep.c:2034
#define sparc_supply_fpregset
static void sparc64nbsd_collect_fpregset(const struct sparc_fpregmap *fpregmap, const struct regcache *regcache, int regnum, void *fpregs)
void sparc64_collect_gregset(const struct sparc_gregmap *gregmap, const struct regcache *regcache, int regnum, void *gregs)
void sparc64_supply_gregset(const struct sparc_gregmap *gregmap, struct regcache *regcache, int regnum, const void *gregs)
void sparc_supply_rwindow(struct regcache *regcache, CORE_ADDR sp, int regnum)
Definition: sparc-tdep.c:1750
const struct sparc_gregmap sparc32nbsd_gregmap
#define sparc_supply_gregset
const struct sparc_fpregmap sparc64_bsd_fpregmap
const struct sparc_gregmap sparc64nbsd_gregmap
void sparc64_supply_fpregset(const struct sparc_fpregmap *fpregmap, struct regcache *regcache, int regnum, const void *fpregs)
static int sparc64nbsd_fpregset_supplies_p(struct gdbarch *gdbarch, int regnum)
void sparc32_supply_fpregset(const struct sparc_fpregmap *fpregmap, struct regcache *regcache, int regnum, const void *fpregs)
Definition: sparc-tdep.c:2014
#define sparc_collect_fpregset
static int sparc64nbsd_supply_pcb(struct regcache *regcache, struct pcb *pcb)
void sparc32_collect_gregset(const struct sparc_gregmap *gregmap, const struct regcache *regcache, int regnum, void *gregs)
Definition: sparc-tdep.c:1959
int regnum
Definition: aarch64-tdep.c:69
void read_memory(CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
Definition: corefile.c:244
unsigned long * gregmap
Definition: xtensa-tdep.h:235
static void sparc64nbsd_supply_gregset(const struct sparc_gregmap *gregmap, struct regcache *regcache, int regnum, const void *gregs)
const struct sparc_fpregmap sparc32_bsd_fpregmap
Definition: sparc-tdep.c:2075
bfd_byte gdb_byte
Definition: common-types.h:38
#define sparc_collect_gregset
void regcache_raw_supply(struct regcache *regcache, int regnum, const void *buf)
Definition: regcache.c:1041
int(* sparc_fpregset_supplies_p)(struct gdbarch *, int)
Definition: sparc-nat.c:93
void bsd_kvm_add_target(int(*supply_pcb)(struct regcache *, struct pcb *))
Definition: bsd-kvm.c:351
int(* sparc_gregset_supplies_p)(struct gdbarch *, int)
Definition: sparc-nat.c:92
static int sparc64nbsd_gregset_supplies_p(struct gdbarch *gdbarch, int regnum)
static void sparc64nbsd_supply_fpregset(const struct sparc_fpregmap *fpregmap, struct regcache *regcache, int regnum, const void *fpregs)