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8b39fe56 MK |
1 | /* Target-dependent code for FreeBSD/sparc64. |
2 | ||
618f726f | 3 | Copyright (C) 2003-2016 Free Software Foundation, Inc. |
8b39fe56 MK |
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 | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
8b39fe56 MK |
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 | |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
8b39fe56 MK |
19 | |
20 | #include "defs.h" | |
386c036b MK |
21 | #include "frame.h" |
22 | #include "frame-unwind.h" | |
8b39fe56 MK |
23 | #include "gdbcore.h" |
24 | #include "osabi.h" | |
25 | #include "regcache.h" | |
762c360d | 26 | #include "regset.h" |
8b39fe56 | 27 | #include "target.h" |
386c036b | 28 | #include "trad-frame.h" |
8b39fe56 | 29 | |
8b39fe56 | 30 | #include "sparc64-tdep.h" |
e5139de8 | 31 | #include "fbsd-tdep.h" |
9e07977b | 32 | #include "solib-svr4.h" |
8b39fe56 MK |
33 | |
34 | /* From <machine/reg.h>. */ | |
b4fd25c9 | 35 | const struct sparc_gregmap sparc64fbsd_gregmap = |
8b39fe56 | 36 | { |
386c036b MK |
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 | }; | |
8b39fe56 MK |
47 | \f |
48 | ||
49 | static void | |
762c360d MK |
50 | sparc64fbsd_supply_gregset (const struct regset *regset, |
51 | struct regcache *regcache, | |
52 | int regnum, const void *gregs, size_t len) | |
8b39fe56 | 53 | { |
b4fd25c9 | 54 | sparc64_supply_gregset (&sparc64fbsd_gregmap, regcache, regnum, gregs); |
8b39fe56 MK |
55 | } |
56 | ||
ae036357 MK |
57 | static void |
58 | sparc64fbsd_collect_gregset (const struct regset *regset, | |
59 | const struct regcache *regcache, | |
60 | int regnum, void *gregs, size_t len) | |
61 | { | |
b4fd25c9 | 62 | sparc64_collect_gregset (&sparc64fbsd_gregmap, regcache, regnum, gregs); |
ae036357 MK |
63 | } |
64 | ||
762c360d MK |
65 | static void |
66 | sparc64fbsd_supply_fpregset (const struct regset *regset, | |
67 | struct regcache *regcache, | |
68 | int regnum, const void *fpregs, size_t len) | |
8b39fe56 | 69 | { |
b4fd25c9 | 70 | sparc64_supply_fpregset (&sparc64_bsd_fpregmap, regcache, regnum, fpregs); |
762c360d | 71 | } |
ae036357 MK |
72 | |
73 | static void | |
74 | sparc64fbsd_collect_fpregset (const struct regset *regset, | |
75 | const struct regcache *regcache, | |
76 | int regnum, void *fpregs, size_t len) | |
77 | { | |
b4fd25c9 | 78 | sparc64_collect_fpregset (&sparc64_bsd_fpregmap, regcache, regnum, fpregs); |
ae036357 | 79 | } |
8b39fe56 MK |
80 | \f |
81 | ||
386c036b MK |
82 | /* Signal trampolines. */ |
83 | ||
84 | static int | |
2c02bd72 | 85 | sparc64fbsd_pc_in_sigtramp (CORE_ADDR pc, const char *name) |
386c036b MK |
86 | { |
87 | return (name && strcmp (name, "__sigtramp") == 0); | |
88 | } | |
89 | ||
90 | static struct sparc_frame_cache * | |
94afd7a6 | 91 | sparc64fbsd_sigtramp_frame_cache (struct frame_info *this_frame, |
386c036b MK |
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) | |
19ba03f4 | 100 | return (struct sparc_frame_cache *) *this_cache; |
386c036b | 101 | |
94afd7a6 | 102 | cache = sparc_frame_cache (this_frame, this_cache); |
386c036b MK |
103 | gdb_assert (cache == *this_cache); |
104 | ||
94afd7a6 | 105 | cache->saved_regs = trad_frame_alloc_saved_regs (this_frame); |
386c036b MK |
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. */ | |
94afd7a6 | 110 | addr = get_frame_register_unsigned (this_frame, SPARC_O2_REGNUM); |
386c036b MK |
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; | |
94afd7a6 | 137 | sp = get_frame_memory_unsigned (this_frame, addr, 8); |
386c036b MK |
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; | |
94afd7a6 | 148 | fprs = get_frame_memory_unsigned (this_frame, addr, 8); |
386c036b MK |
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 | |
94afd7a6 | 164 | sparc64fbsd_sigtramp_frame_this_id (struct frame_info *this_frame, |
386c036b MK |
165 | void **this_cache, |
166 | struct frame_id *this_id) | |
167 | { | |
168 | struct sparc_frame_cache *cache = | |
94afd7a6 | 169 | sparc64fbsd_sigtramp_frame_cache (this_frame, this_cache); |
386c036b MK |
170 | |
171 | (*this_id) = frame_id_build (cache->base, cache->pc); | |
172 | } | |
173 | ||
94afd7a6 UW |
174 | static struct value * |
175 | sparc64fbsd_sigtramp_frame_prev_register (struct frame_info *this_frame, | |
176 | void **this_cache, int regnum) | |
386c036b MK |
177 | { |
178 | struct sparc_frame_cache *cache = | |
94afd7a6 | 179 | sparc64fbsd_sigtramp_frame_cache (this_frame, this_cache); |
386c036b | 180 | |
94afd7a6 | 181 | return trad_frame_get_prev_register (this_frame, cache->saved_regs, regnum); |
386c036b MK |
182 | } |
183 | ||
94afd7a6 UW |
184 | static int |
185 | sparc64fbsd_sigtramp_frame_sniffer (const struct frame_unwind *self, | |
186 | struct frame_info *this_frame, | |
187 | void **this_cache) | |
386c036b | 188 | { |
94afd7a6 | 189 | CORE_ADDR pc = get_frame_pc (this_frame); |
2c02bd72 | 190 | const char *name; |
386c036b MK |
191 | |
192 | find_pc_partial_function (pc, &name, NULL, NULL); | |
193 | if (sparc64fbsd_pc_in_sigtramp (pc, name)) | |
94afd7a6 | 194 | return 1; |
386c036b | 195 | |
94afd7a6 | 196 | return 0; |
386c036b | 197 | } |
94afd7a6 UW |
198 | |
199 | static const struct frame_unwind sparc64fbsd_sigtramp_frame_unwind = | |
200 | { | |
201 | SIGTRAMP_FRAME, | |
8fbca658 | 202 | default_frame_unwind_stop_reason, |
94afd7a6 UW |
203 | sparc64fbsd_sigtramp_frame_this_id, |
204 | sparc64fbsd_sigtramp_frame_prev_register, | |
205 | NULL, | |
206 | sparc64fbsd_sigtramp_frame_sniffer | |
207 | }; | |
386c036b MK |
208 | \f |
209 | ||
b13feb94 AA |
210 | static const struct regset sparc64fbsd_gregset = |
211 | { | |
212 | NULL, sparc64fbsd_supply_gregset, sparc64fbsd_collect_gregset | |
213 | }; | |
214 | ||
215 | static const struct regset sparc64fbsd_fpregset = | |
216 | { | |
217 | NULL, sparc64fbsd_supply_fpregset, sparc64fbsd_collect_fpregset | |
218 | }; | |
219 | ||
8b39fe56 MK |
220 | static void |
221 | sparc64fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) | |
222 | { | |
762c360d MK |
223 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
224 | ||
e5139de8 AA |
225 | /* Generic FreeBSD support. */ |
226 | fbsd_init_abi (info, gdbarch); | |
227 | ||
b13feb94 | 228 | tdep->gregset = &sparc64fbsd_gregset; |
762c360d MK |
229 | tdep->sizeof_gregset = 256; |
230 | ||
b13feb94 | 231 | tdep->fpregset = &sparc64fbsd_fpregset; |
762c360d MK |
232 | tdep->sizeof_fpregset = 272; |
233 | ||
94afd7a6 | 234 | frame_unwind_append_unwinder (gdbarch, &sparc64fbsd_sigtramp_frame_unwind); |
386c036b MK |
235 | |
236 | sparc64_init_abi (info, gdbarch); | |
9e07977b MK |
237 | |
238 | /* FreeBSD/sparc64 has SVR4-style shared libraries. */ | |
239 | set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target); | |
240 | set_solib_svr4_fetch_link_map_offsets | |
241 | (gdbarch, svr4_lp64_fetch_link_map_offsets); | |
8b39fe56 MK |
242 | } |
243 | ||
244 | /* Provide a prototype to silence -Wmissing-prototypes. */ | |
245 | void _initialize_sparc64fbsd_tdep (void); | |
246 | ||
247 | void | |
248 | _initialize_sparc64fbsd_tdep (void) | |
249 | { | |
250 | gdbarch_register_osabi (bfd_arch_sparc, bfd_mach_sparc_v9, | |
251 | GDB_OSABI_FREEBSD_ELF, sparc64fbsd_init_abi); | |
8b39fe56 | 252 | } |