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/tmp/gdb-7.10/gdb/sparc64fbsd-tdep.c
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1 /* Target-dependent code for FreeBSD/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 "frame.h"
22 #include "frame-unwind.h"
23 #include "gdbcore.h"
24 #include "osabi.h"
25 #include "regcache.h"
26 #include "regset.h"
27 #include "target.h"
28 #include "trad-frame.h"
29 
30 #include "sparc64-tdep.h"
31 #include "fbsd-tdep.h"
32 #include "solib-svr4.h"
33 
34 /* From <machine/reg.h>. */
35 const struct sparc_gregmap sparc64fbsd_gregmap =
36 {
37  26 * 8, /* "tstate" */
38  25 * 8, /* %pc */
39  24 * 8, /* %npc */
40  28 * 8, /* %y */
41  16 * 8, /* %fprs */
42  -1,
43  1 * 8, /* %g1 */
44  -1, /* %l0 */
45  8 /* sizeof (%y) */
46 };
47 
48 
49 static void
51  struct regcache *regcache,
52  int regnum, const void *gregs, size_t len)
53 {
54  sparc64_supply_gregset (&sparc64fbsd_gregmap, regcache, regnum, gregs);
55 }
56 
57 static void
59  const struct regcache *regcache,
60  int regnum, void *gregs, size_t len)
61 {
62  sparc64_collect_gregset (&sparc64fbsd_gregmap, regcache, regnum, gregs);
63 }
64 
65 static void
67  struct regcache *regcache,
68  int regnum, const void *fpregs, size_t len)
69 {
70  sparc64_supply_fpregset (&sparc64_bsd_fpregmap, regcache, regnum, fpregs);
71 }
72 
73 static void
75  const struct regcache *regcache,
76  int regnum, void *fpregs, size_t len)
77 {
78  sparc64_collect_fpregset (&sparc64_bsd_fpregmap, regcache, regnum, fpregs);
79 }
80 
81 
82 /* Signal trampolines. */
83 
84 static int
86 {
87  return (name && strcmp (name, "__sigtramp") == 0);
88 }
89 
90 static struct sparc_frame_cache *
92  void **this_cache)
93 {
94  struct sparc_frame_cache *cache;
95  CORE_ADDR addr, mcontext_addr, sp;
96  LONGEST fprs;
97  int regnum;
98 
99  if (*this_cache)
100  return *this_cache;
101 
102  cache = sparc_frame_cache (this_frame, this_cache);
103  gdb_assert (cache == *this_cache);
104 
105  cache->saved_regs = trad_frame_alloc_saved_regs (this_frame);
106 
107  /* The third argument is a pointer to an instance of `ucontext_t',
108  which has a member `uc_mcontext' that contains the saved
109  registers. */
110  addr = get_frame_register_unsigned (this_frame, SPARC_O2_REGNUM);
111  mcontext_addr = addr + 64;
112 
113  /* The following registers travel in the `mc_local' slots of
114  `mcontext_t'. */
115  addr = mcontext_addr + 16 * 8;
116  cache->saved_regs[SPARC64_FPRS_REGNUM].addr = addr + 0 * 8;
117  cache->saved_regs[SPARC64_FSR_REGNUM].addr = addr + 1 * 8;
118 
119  /* The following registers travel in the `mc_in' slots of
120  `mcontext_t'. */
121  addr = mcontext_addr + 24 * 8;
122  cache->saved_regs[SPARC64_NPC_REGNUM].addr = addr + 0 * 8;
123  cache->saved_regs[SPARC64_PC_REGNUM].addr = addr + 1 * 8;
124  cache->saved_regs[SPARC64_STATE_REGNUM].addr = addr + 2 * 8;
125  cache->saved_regs[SPARC64_Y_REGNUM].addr = addr + 4 * 8;
126 
127  /* The `global' and `out' registers travel in the `mc_global' and
128  `mc_out' slots of `mcontext_t', except for %g0. Since %g0 is
129  always zero, keep the identity encoding. */
130  for (regnum = SPARC_G1_REGNUM, addr = mcontext_addr + 8;
131  regnum <= SPARC_O7_REGNUM; regnum++, addr += 8)
132  cache->saved_regs[regnum].addr = addr;
133 
134  /* The `local' and `in' registers have been saved in the register
135  save area. */
136  addr = cache->saved_regs[SPARC_SP_REGNUM].addr;
137  sp = get_frame_memory_unsigned (this_frame, addr, 8);
138  for (regnum = SPARC_L0_REGNUM, addr = sp + BIAS;
139  regnum <= SPARC_I7_REGNUM; regnum++, addr += 8)
140  cache->saved_regs[regnum].addr = addr;
141 
142  /* The floating-point registers are only saved if the FEF bit in
143  %fprs has been set. */
144 
145 #define FPRS_FEF (1 << 2)
146 
147  addr = cache->saved_regs[SPARC64_FPRS_REGNUM].addr;
148  fprs = get_frame_memory_unsigned (this_frame, addr, 8);
149  if (fprs & FPRS_FEF)
150  {
151  for (regnum = SPARC_F0_REGNUM, addr = mcontext_addr + 32 * 8;
152  regnum <= SPARC_F31_REGNUM; regnum++, addr += 4)
153  cache->saved_regs[regnum].addr = addr;
154 
155  for (regnum = SPARC64_F32_REGNUM;
156  regnum <= SPARC64_F62_REGNUM; regnum++, addr += 8)
157  cache->saved_regs[regnum].addr = addr;
158  }
159 
160  return cache;
161 }
162 
163 static void
165  void **this_cache,
166  struct frame_id *this_id)
167 {
168  struct sparc_frame_cache *cache =
169  sparc64fbsd_sigtramp_frame_cache (this_frame, this_cache);
170 
171  (*this_id) = frame_id_build (cache->base, cache->pc);
172 }
173 
174 static struct value *
176  void **this_cache, int regnum)
177 {
178  struct sparc_frame_cache *cache =
179  sparc64fbsd_sigtramp_frame_cache (this_frame, this_cache);
180 
181  return trad_frame_get_prev_register (this_frame, cache->saved_regs, regnum);
182 }
183 
184 static int
186  struct frame_info *this_frame,
187  void **this_cache)
188 {
189  CORE_ADDR pc = get_frame_pc (this_frame);
190  const char *name;
191 
192  find_pc_partial_function (pc, &name, NULL, NULL);
193  if (sparc64fbsd_pc_in_sigtramp (pc, name))
194  return 1;
195 
196  return 0;
197 }
198 
199 static const struct frame_unwind sparc64fbsd_sigtramp_frame_unwind =
200 {
205  NULL,
207 };
208 
209 
210 static const struct regset sparc64fbsd_gregset =
211  {
213  };
214 
215 static const struct regset sparc64fbsd_fpregset =
216  {
218  };
219 
220 static void
222 {
223  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
224 
225  /* Generic FreeBSD support. */
226  fbsd_init_abi (info, gdbarch);
227 
228  tdep->gregset = &sparc64fbsd_gregset;
229  tdep->sizeof_gregset = 256;
230 
232  tdep->sizeof_fpregset = 272;
233 
234  frame_unwind_append_unwinder (gdbarch, &sparc64fbsd_sigtramp_frame_unwind);
235 
236  sparc64_init_abi (info, gdbarch);
237 
238  /* FreeBSD/sparc64 has SVR4-style shared libraries. */
242 }
243 
244 /* Provide a prototype to silence -Wmissing-prototypes. */
245 void _initialize_sparc64fbsd_tdep (void);
246 
247 void
249 {
250  gdbarch_register_osabi (bfd_arch_sparc, bfd_mach_sparc_v9,
252 }
void sparc64_collect_fpregset(const struct sparc_fpregmap *fpregmap, const struct regcache *regcache, int regnum, void *fpregs)
void sparc64_init_abi(struct gdbarch_info info, struct gdbarch *gdbarch)
static void sparc64fbsd_sigtramp_frame_this_id(struct frame_info *this_frame, void **this_cache, struct frame_id *this_id)
struct frame_id frame_id_build(CORE_ADDR stack_addr, CORE_ADDR code_addr)
Definition: frame.c:554
#define FPRS_FEF
CORE_ADDR get_frame_pc(struct frame_info *frame)
Definition: frame.c:2217
static void sparc64fbsd_supply_gregset(const struct regset *regset, struct regcache *regcache, int regnum, const void *gregs, size_t len)
bfd_vma CORE_ADDR
Definition: common-types.h:41
struct link_map_offsets * svr4_lp64_fetch_link_map_offsets(void)
Definition: solib-svr4.c:3180
struct value * trad_frame_get_prev_register(struct frame_info *this_frame, struct trad_frame_saved_reg this_saved_regs[], int regnum)
Definition: trad-frame.c:135
void set_gdbarch_skip_trampoline_code(struct gdbarch *gdbarch, gdbarch_skip_trampoline_code_ftype skip_trampoline_code)
Definition: gdbarch.c:3084
const struct regset * gregset
Definition: sparc-tdep.h:61
struct sparc_frame_cache * sparc_frame_cache(struct frame_info *this_frame, void **this_cache)
Definition: sparc-tdep.c:1098
#define BIAS
Definition: sparc-tdep.c:70
static int sparc64fbsd_pc_in_sigtramp(CORE_ADDR pc, const char *name)
size_t sizeof_fpregset
Definition: i386-tdep.h:64
ULONGEST get_frame_memory_unsigned(struct frame_info *this_frame, CORE_ADDR addr, int len)
Definition: frame.c:2515
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)
struct gdbarch_tdep * gdbarch_tdep(struct gdbarch *gdbarch)
Definition: gdbarch.c:1402
static const struct regset sparc64fbsd_gregset
void frame_unwind_append_unwinder(struct gdbarch *gdbarch, const struct frame_unwind *unwinder)
Definition: frame-unwind.c:78
struct trad_frame_saved_reg * saved_regs
Definition: sparc-tdep.h:173
Definition: regset.h:34
const struct sparc_fpregmap sparc64_bsd_fpregmap
const char *const name
Definition: aarch64-tdep.c:68
CORE_ADDR find_solib_trampoline_target(struct frame_info *frame, CORE_ADDR pc)
Definition: minsyms.c:1394
CORE_ADDR base
Definition: sparc-tdep.h:154
void sparc64_supply_fpregset(const struct sparc_fpregmap *fpregmap, struct regcache *regcache, int regnum, const void *fpregs)
static void sparc64fbsd_supply_fpregset(const struct regset *regset, struct regcache *regcache, int regnum, const void *fpregs, size_t len)
void set_solib_svr4_fetch_link_map_offsets(struct gdbarch *gdbarch, struct link_map_offsets *(*flmo)(void))
Definition: solib-svr4.c:3108
int find_pc_partial_function(CORE_ADDR pc, const char **name, CORE_ADDR *address, CORE_ADDR *endaddr)
Definition: blockframe.c:321
void fbsd_init_abi(struct gdbarch_info info, struct gdbarch *gdbarch)
Definition: fbsd-tdep.c:132
#define gdb_assert(expr)
Definition: gdb_assert.h:33
int regnum
Definition: aarch64-tdep.c:69
ULONGEST get_frame_register_unsigned(struct frame_info *frame, int regnum)
Definition: frame.c:1194
Definition: value.c:172
void _initialize_sparc64fbsd_tdep(void)
static int sparc64fbsd_sigtramp_frame_sniffer(const struct frame_unwind *self, struct frame_info *this_frame, void **this_cache)
struct trad_frame_saved_reg * trad_frame_alloc_saved_regs(struct frame_info *this_frame)
Definition: trad-frame.c:52
static struct sparc_frame_cache * sparc64fbsd_sigtramp_frame_cache(struct frame_info *this_frame, void **this_cache)
static const struct regset sparc64fbsd_fpregset
size_t sizeof_gregset
Definition: i386-tdep.h:61
const struct regset * fpregset
Definition: i386-tdep.h:242
enum unwind_stop_reason default_frame_unwind_stop_reason(struct frame_info *this_frame, void **this_cache)
Definition: frame-unwind.c:180
static void sparc64fbsd_init_abi(struct gdbarch_info info, struct gdbarch *gdbarch)
static struct value * sparc64fbsd_sigtramp_frame_prev_register(struct frame_info *this_frame, void **this_cache, int regnum)
static void sparc64fbsd_collect_fpregset(const struct regset *regset, const struct regcache *regcache, int regnum, void *fpregs, size_t len)
void gdbarch_register_osabi(enum bfd_architecture arch, unsigned long machine, enum gdb_osabi osabi, void(*init_osabi)(struct gdbarch_info, struct gdbarch *))
Definition: osabi.c:148
static void sparc64fbsd_collect_gregset(const struct regset *regset, const struct regcache *regcache, int regnum, void *gregs, size_t len)
long long LONGEST
Definition: common-types.h:52
const ULONGEST const LONGEST len
Definition: target.h:309