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sparc64-fbsd-tdep.c
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1/* Target-dependent code for FreeBSD/sparc64.
2
3 Copyright (C) 2003-2023 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 "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#include "gdbarch.h"
34
35/* From <machine/reg.h>. */
37{
38 26 * 8, /* "tstate" */
39 25 * 8, /* %pc */
40 24 * 8, /* %npc */
41 28 * 8, /* %y */
42 16 * 8, /* %fprs */
43 -1,
44 1 * 8, /* %g1 */
45 -1, /* %l0 */
46 8 /* sizeof (%y) */
47};
48
49
50static void
52 struct regcache *regcache,
53 int regnum, const void *gregs, size_t len)
54{
56}
57
58static void
60 const struct regcache *regcache,
61 int regnum, void *gregs, size_t len)
62{
64}
65
66static void
68 struct regcache *regcache,
69 int regnum, const void *fpregs, size_t len)
70{
72}
73
74static void
76 const struct regcache *regcache,
77 int regnum, void *fpregs, size_t len)
78{
80}
81
82
83/* Signal trampolines. */
84
85static int
86sparc64fbsd_pc_in_sigtramp (CORE_ADDR pc, const char *name)
87{
88 return (name && strcmp (name, "__sigtramp") == 0);
89}
90
91static struct sparc_frame_cache *
93 void **this_cache)
94{
95 struct sparc_frame_cache *cache;
96 CORE_ADDR addr, mcontext_addr, sp;
97 LONGEST fprs;
98 int regnum;
99
100 if (*this_cache)
101 return (struct sparc_frame_cache *) *this_cache;
102
103 cache = sparc_frame_cache (this_frame, this_cache);
104 gdb_assert (cache == *this_cache);
105
106 cache->saved_regs = trad_frame_alloc_saved_regs (this_frame);
107
108 /* The third argument is a pointer to an instance of `ucontext_t',
109 which has a member `uc_mcontext' that contains the saved
110 registers. */
111 addr = get_frame_register_unsigned (this_frame, SPARC_O2_REGNUM);
112 mcontext_addr = addr + 64;
113
114 /* The following registers travel in the `mc_local' slots of
115 `mcontext_t'. */
116 addr = mcontext_addr + 16 * 8;
117 cache->saved_regs[SPARC64_FPRS_REGNUM].set_addr (addr + 0 * 8);
118 cache->saved_regs[SPARC64_FSR_REGNUM].set_addr (addr + 1 * 8);
119
120 /* The following registers travel in the `mc_in' slots of
121 `mcontext_t'. */
122 addr = mcontext_addr + 24 * 8;
123 cache->saved_regs[SPARC64_NPC_REGNUM].set_addr (addr + 0 * 8);
124 cache->saved_regs[SPARC64_PC_REGNUM].set_addr (addr + 1 * 8);
125 cache->saved_regs[SPARC64_STATE_REGNUM].set_addr (addr + 2 * 8);
126 cache->saved_regs[SPARC64_Y_REGNUM].set_addr (addr + 4 * 8);
127
128 /* The `global' and `out' registers travel in the `mc_global' and
129 `mc_out' slots of `mcontext_t', except for %g0. Since %g0 is
130 always zero, keep the identity encoding. */
131 for (regnum = SPARC_G1_REGNUM, addr = mcontext_addr + 8;
132 regnum <= SPARC_O7_REGNUM; regnum++, addr += 8)
133 cache->saved_regs[regnum].set_addr (addr);
134
135 /* The `local' and `in' registers have been saved in the register
136 save area. */
137 addr = cache->saved_regs[SPARC_SP_REGNUM].addr ();
138 sp = get_frame_memory_unsigned (this_frame, addr, 8);
139 for (regnum = SPARC_L0_REGNUM, addr = sp + BIAS;
140 regnum <= SPARC_I7_REGNUM; regnum++, addr += 8)
141 cache->saved_regs[regnum].set_addr (addr);
142
143 /* The floating-point registers are only saved if the FEF bit in
144 %fprs has been set. */
145
146#define FPRS_FEF (1 << 2)
147
148 addr = cache->saved_regs[SPARC64_FPRS_REGNUM].addr ();
149 fprs = get_frame_memory_unsigned (this_frame, addr, 8);
150 if (fprs & FPRS_FEF)
151 {
152 for (regnum = SPARC_F0_REGNUM, addr = mcontext_addr + 32 * 8;
153 regnum <= SPARC_F31_REGNUM; regnum++, addr += 4)
154 cache->saved_regs[regnum].set_addr (addr);
155
157 regnum <= SPARC64_F62_REGNUM; regnum++, addr += 8)
158 cache->saved_regs[regnum].set_addr (addr);
159 }
160
161 return cache;
162}
163
164static void
166 void **this_cache,
167 struct frame_id *this_id)
168{
169 struct sparc_frame_cache *cache =
170 sparc64fbsd_sigtramp_frame_cache (this_frame, this_cache);
171
172 (*this_id) = frame_id_build (cache->base, cache->pc);
173}
174
175static struct value *
177 void **this_cache, int regnum)
178{
179 struct sparc_frame_cache *cache =
180 sparc64fbsd_sigtramp_frame_cache (this_frame, this_cache);
181
182 return trad_frame_get_prev_register (this_frame, cache->saved_regs, regnum);
183}
184
185static int
187 frame_info_ptr this_frame,
188 void **this_cache)
189{
190 CORE_ADDR pc = get_frame_pc (this_frame);
191 const char *name;
192
193 find_pc_partial_function (pc, &name, NULL, NULL);
195 return 1;
196
197 return 0;
198}
199
210
211
216
221
222static void
224{
225 sparc_gdbarch_tdep *tdep = gdbarch_tdep<sparc_gdbarch_tdep> (gdbarch);
226
227 /* Generic FreeBSD support. */
228 fbsd_init_abi (info, gdbarch);
229
231 tdep->sizeof_gregset = 256;
232
234 tdep->sizeof_fpregset = 272;
235
237
239
240 /* FreeBSD/sparc64 has SVR4-style shared libraries. */
244}
245
247void
249{
250 gdbarch_register_osabi (bfd_arch_sparc, bfd_mach_sparc_v9,
252}
int regnum
const char *const name
bool find_pc_partial_function(CORE_ADDR pc, const char **name, CORE_ADDR *address, CORE_ADDR *endaddr, const struct block **block)
Definition blockframe.c:373
void fbsd_init_abi(struct gdbarch_info info, struct gdbarch *gdbarch)
Definition fbsd-tdep.c:2380
enum unwind_stop_reason default_frame_unwind_stop_reason(frame_info_ptr this_frame, void **this_cache)
void frame_unwind_append_unwinder(struct gdbarch *gdbarch, const struct frame_unwind *unwinder)
ULONGEST get_frame_register_unsigned(frame_info_ptr frame, int regnum)
Definition frame.c:1399
CORE_ADDR get_frame_pc(frame_info_ptr frame)
Definition frame.c:2712
struct frame_id frame_id_build(CORE_ADDR stack_addr, CORE_ADDR code_addr)
Definition frame.c:736
ULONGEST get_frame_memory_unsigned(frame_info_ptr this_frame, CORE_ADDR addr, int len)
Definition frame.c:3007
@ SIGTRAMP_FRAME
Definition frame.h:198
void set_gdbarch_skip_trampoline_code(struct gdbarch *gdbarch, gdbarch_skip_trampoline_code_ftype *skip_trampoline_code)
CORE_ADDR find_solib_trampoline_target(frame_info_ptr frame, CORE_ADDR pc)
Definition minsyms.c:1554
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:146
@ GDB_OSABI_FREEBSD
Definition osabi.h:33
void set_solib_svr4_fetch_link_map_offsets(struct gdbarch *gdbarch, struct link_map_offsets *(*flmo)(void))
struct link_map_offsets * svr4_lp64_fetch_link_map_offsets(void)
struct sparc_frame_cache * sparc_frame_cache(frame_info_ptr this_frame, void **this_cache)
#define BIAS
Definition sparc-tdep.c:68
@ SPARC_O2_REGNUM
Definition sparc-tdep.h:114
@ SPARC_G1_REGNUM
Definition sparc-tdep.h:105
@ SPARC_L0_REGNUM
Definition sparc-tdep.h:120
@ SPARC_F0_REGNUM
Definition sparc-tdep.h:136
@ SPARC_I7_REGNUM
Definition sparc-tdep.h:135
@ SPARC_F31_REGNUM
Definition sparc-tdep.h:144
@ SPARC_O7_REGNUM
Definition sparc-tdep.h:119
@ SPARC_SP_REGNUM
Definition sparc-tdep.h:118
static const struct frame_unwind sparc64fbsd_sigtramp_frame_unwind
static void sparc64fbsd_supply_gregset(const struct regset *regset, struct regcache *regcache, int regnum, const void *gregs, size_t len)
static void sparc64fbsd_collect_fpregset(const struct regset *regset, const struct regcache *regcache, int regnum, void *fpregs, size_t len)
void _initialize_sparc64fbsd_tdep()
static void sparc64fbsd_collect_gregset(const struct regset *regset, const struct regcache *regcache, int regnum, void *gregs, size_t len)
static void sparc64fbsd_init_abi(struct gdbarch_info info, struct gdbarch *gdbarch)
static const struct regset sparc64fbsd_gregset
static int sparc64fbsd_sigtramp_frame_sniffer(const struct frame_unwind *self, frame_info_ptr this_frame, void **this_cache)
static struct value * sparc64fbsd_sigtramp_frame_prev_register(frame_info_ptr this_frame, void **this_cache, int regnum)
static void sparc64fbsd_sigtramp_frame_this_id(frame_info_ptr this_frame, void **this_cache, struct frame_id *this_id)
static void sparc64fbsd_supply_fpregset(const struct regset *regset, struct regcache *regcache, int regnum, const void *fpregs, size_t len)
const struct sparc_gregmap sparc64fbsd_gregmap
static const struct regset sparc64fbsd_fpregset
static struct sparc_frame_cache * sparc64fbsd_sigtramp_frame_cache(frame_info_ptr this_frame, void **this_cache)
static int sparc64fbsd_pc_in_sigtramp(CORE_ADDR pc, const char *name)
#define FPRS_FEF
void sparc64_supply_gregset(const struct sparc_gregmap *gregmap, struct regcache *regcache, int regnum, const void *gregs)
void sparc64_supply_fpregset(const struct sparc_fpregmap *fpregmap, struct regcache *regcache, int regnum, const void *fpregs)
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)
const struct sparc_fpregmap sparc64_bsd_fpregmap
void sparc64_collect_gregset(const struct sparc_gregmap *gregmap, const struct regcache *regcache, int regnum, void *gregs)
@ SPARC64_FSR_REGNUM
@ SPARC64_Y_REGNUM
@ SPARC64_PC_REGNUM
@ SPARC64_F32_REGNUM
@ SPARC64_FPRS_REGNUM
@ SPARC64_NPC_REGNUM
@ SPARC64_STATE_REGNUM
@ SPARC64_F62_REGNUM
struct trad_frame_saved_reg * saved_regs
Definition sparc-tdep.h:192
const struct regset * fpregset
Definition sparc-tdep.h:77
const struct regset * gregset
Definition sparc-tdep.h:75
void set_addr(LONGEST addr)
Definition trad-frame.h:102
Definition value.h:130
trad_frame_saved_reg * trad_frame_alloc_saved_regs(struct gdbarch *gdbarch)
Definition trad-frame.c:62
struct value * trad_frame_get_prev_register(frame_info_ptr this_frame, trad_frame_saved_reg this_saved_regs[], int regnum)
Definition trad-frame.c:187