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8b39fe56 MK |
1 | /* Target-dependent code for FreeBSD/sparc64. |
2 | ||
4c38e0a4 | 3 | Copyright (C) 2003, 2004, 2005, 2007, 2008, 2009, 2010 |
0fb0cc75 | 4 | Free Software Foundation, Inc. |
8b39fe56 MK |
5 | |
6 | This file is part of GDB. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 10 | the Free Software Foundation; either version 3 of the License, or |
8b39fe56 MK |
11 | (at your option) any later version. |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
8b39fe56 MK |
20 | |
21 | #include "defs.h" | |
386c036b MK |
22 | #include "frame.h" |
23 | #include "frame-unwind.h" | |
8b39fe56 MK |
24 | #include "gdbcore.h" |
25 | #include "osabi.h" | |
26 | #include "regcache.h" | |
762c360d | 27 | #include "regset.h" |
8b39fe56 | 28 | #include "target.h" |
386c036b | 29 | #include "trad-frame.h" |
8b39fe56 | 30 | |
386c036b | 31 | #include "gdb_assert.h" |
8b39fe56 MK |
32 | #include "gdb_string.h" |
33 | ||
34 | #include "sparc64-tdep.h" | |
9e07977b | 35 | #include "solib-svr4.h" |
8b39fe56 MK |
36 | |
37 | /* From <machine/reg.h>. */ | |
386c036b | 38 | const struct sparc_gregset sparc64fbsd_gregset = |
8b39fe56 | 39 | { |
386c036b MK |
40 | 26 * 8, /* "tstate" */ |
41 | 25 * 8, /* %pc */ | |
42 | 24 * 8, /* %npc */ | |
43 | 28 * 8, /* %y */ | |
44 | 16 * 8, /* %fprs */ | |
45 | -1, | |
46 | 1 * 8, /* %g1 */ | |
47 | -1, /* %l0 */ | |
48 | 8 /* sizeof (%y) */ | |
49 | }; | |
8b39fe56 MK |
50 | \f |
51 | ||
52 | static void | |
762c360d MK |
53 | sparc64fbsd_supply_gregset (const struct regset *regset, |
54 | struct regcache *regcache, | |
55 | int regnum, const void *gregs, size_t len) | |
8b39fe56 | 56 | { |
9ea75c57 | 57 | sparc64_supply_gregset (&sparc64fbsd_gregset, regcache, regnum, gregs); |
8b39fe56 MK |
58 | } |
59 | ||
ae036357 MK |
60 | static void |
61 | sparc64fbsd_collect_gregset (const struct regset *regset, | |
62 | const struct regcache *regcache, | |
63 | int regnum, void *gregs, size_t len) | |
64 | { | |
65 | sparc64_collect_gregset (&sparc64fbsd_gregset, regcache, regnum, gregs); | |
66 | } | |
67 | ||
762c360d MK |
68 | static void |
69 | sparc64fbsd_supply_fpregset (const struct regset *regset, | |
70 | struct regcache *regcache, | |
71 | int regnum, const void *fpregs, size_t len) | |
8b39fe56 | 72 | { |
762c360d MK |
73 | sparc64_supply_fpregset (regcache, regnum, fpregs); |
74 | } | |
ae036357 MK |
75 | |
76 | static void | |
77 | sparc64fbsd_collect_fpregset (const struct regset *regset, | |
78 | const struct regcache *regcache, | |
79 | int regnum, void *fpregs, size_t len) | |
80 | { | |
81 | sparc64_collect_fpregset (regcache, regnum, fpregs); | |
82 | } | |
8b39fe56 MK |
83 | \f |
84 | ||
386c036b MK |
85 | /* Signal trampolines. */ |
86 | ||
87 | static int | |
88 | sparc64fbsd_pc_in_sigtramp (CORE_ADDR pc, char *name) | |
89 | { | |
90 | return (name && strcmp (name, "__sigtramp") == 0); | |
91 | } | |
92 | ||
93 | static struct sparc_frame_cache * | |
94afd7a6 | 94 | sparc64fbsd_sigtramp_frame_cache (struct frame_info *this_frame, |
386c036b MK |
95 | void **this_cache) |
96 | { | |
97 | struct sparc_frame_cache *cache; | |
98 | CORE_ADDR addr, mcontext_addr, sp; | |
99 | LONGEST fprs; | |
100 | int regnum; | |
101 | ||
102 | if (*this_cache) | |
103 | return *this_cache; | |
104 | ||
94afd7a6 | 105 | cache = sparc_frame_cache (this_frame, this_cache); |
386c036b MK |
106 | gdb_assert (cache == *this_cache); |
107 | ||
94afd7a6 | 108 | cache->saved_regs = trad_frame_alloc_saved_regs (this_frame); |
386c036b MK |
109 | |
110 | /* The third argument is a pointer to an instance of `ucontext_t', | |
111 | which has a member `uc_mcontext' that contains the saved | |
112 | registers. */ | |
94afd7a6 | 113 | addr = get_frame_register_unsigned (this_frame, SPARC_O2_REGNUM); |
386c036b MK |
114 | mcontext_addr = addr + 64; |
115 | ||
116 | /* The following registers travel in the `mc_local' slots of | |
117 | `mcontext_t'. */ | |
118 | addr = mcontext_addr + 16 * 8; | |
119 | cache->saved_regs[SPARC64_FPRS_REGNUM].addr = addr + 0 * 8; | |
120 | cache->saved_regs[SPARC64_FSR_REGNUM].addr = addr + 1 * 8; | |
121 | ||
122 | /* The following registers travel in the `mc_in' slots of | |
123 | `mcontext_t'. */ | |
124 | addr = mcontext_addr + 24 * 8; | |
125 | cache->saved_regs[SPARC64_NPC_REGNUM].addr = addr + 0 * 8; | |
126 | cache->saved_regs[SPARC64_PC_REGNUM].addr = addr + 1 * 8; | |
127 | cache->saved_regs[SPARC64_STATE_REGNUM].addr = addr + 2 * 8; | |
128 | cache->saved_regs[SPARC64_Y_REGNUM].addr = addr + 4 * 8; | |
129 | ||
130 | /* The `global' and `out' registers travel in the `mc_global' and | |
131 | `mc_out' slots of `mcontext_t', except for %g0. Since %g0 is | |
132 | always zero, keep the identity encoding. */ | |
133 | for (regnum = SPARC_G1_REGNUM, addr = mcontext_addr + 8; | |
134 | regnum <= SPARC_O7_REGNUM; regnum++, addr += 8) | |
135 | cache->saved_regs[regnum].addr = addr; | |
136 | ||
137 | /* The `local' and `in' registers have been saved in the register | |
138 | save area. */ | |
139 | addr = cache->saved_regs[SPARC_SP_REGNUM].addr; | |
94afd7a6 | 140 | sp = get_frame_memory_unsigned (this_frame, addr, 8); |
386c036b MK |
141 | for (regnum = SPARC_L0_REGNUM, addr = sp + BIAS; |
142 | regnum <= SPARC_I7_REGNUM; regnum++, addr += 8) | |
143 | cache->saved_regs[regnum].addr = addr; | |
144 | ||
145 | /* The floating-point registers are only saved if the FEF bit in | |
146 | %fprs has been set. */ | |
147 | ||
148 | #define FPRS_FEF (1 << 2) | |
149 | ||
150 | addr = cache->saved_regs[SPARC64_FPRS_REGNUM].addr; | |
94afd7a6 | 151 | fprs = get_frame_memory_unsigned (this_frame, addr, 8); |
386c036b MK |
152 | if (fprs & FPRS_FEF) |
153 | { | |
154 | for (regnum = SPARC_F0_REGNUM, addr = mcontext_addr + 32 * 8; | |
155 | regnum <= SPARC_F31_REGNUM; regnum++, addr += 4) | |
156 | cache->saved_regs[regnum].addr = addr; | |
157 | ||
158 | for (regnum = SPARC64_F32_REGNUM; | |
159 | regnum <= SPARC64_F62_REGNUM; regnum++, addr += 8) | |
160 | cache->saved_regs[regnum].addr = addr; | |
161 | } | |
162 | ||
163 | return cache; | |
164 | } | |
165 | ||
166 | static void | |
94afd7a6 | 167 | sparc64fbsd_sigtramp_frame_this_id (struct frame_info *this_frame, |
386c036b MK |
168 | void **this_cache, |
169 | struct frame_id *this_id) | |
170 | { | |
171 | struct sparc_frame_cache *cache = | |
94afd7a6 | 172 | sparc64fbsd_sigtramp_frame_cache (this_frame, this_cache); |
386c036b MK |
173 | |
174 | (*this_id) = frame_id_build (cache->base, cache->pc); | |
175 | } | |
176 | ||
94afd7a6 UW |
177 | static struct value * |
178 | sparc64fbsd_sigtramp_frame_prev_register (struct frame_info *this_frame, | |
179 | void **this_cache, int regnum) | |
386c036b MK |
180 | { |
181 | struct sparc_frame_cache *cache = | |
94afd7a6 | 182 | sparc64fbsd_sigtramp_frame_cache (this_frame, this_cache); |
386c036b | 183 | |
94afd7a6 | 184 | return trad_frame_get_prev_register (this_frame, cache->saved_regs, regnum); |
386c036b MK |
185 | } |
186 | ||
94afd7a6 UW |
187 | static int |
188 | sparc64fbsd_sigtramp_frame_sniffer (const struct frame_unwind *self, | |
189 | struct frame_info *this_frame, | |
190 | void **this_cache) | |
386c036b | 191 | { |
94afd7a6 | 192 | CORE_ADDR pc = get_frame_pc (this_frame); |
386c036b MK |
193 | char *name; |
194 | ||
195 | find_pc_partial_function (pc, &name, NULL, NULL); | |
196 | if (sparc64fbsd_pc_in_sigtramp (pc, name)) | |
94afd7a6 | 197 | return 1; |
386c036b | 198 | |
94afd7a6 | 199 | return 0; |
386c036b | 200 | } |
94afd7a6 UW |
201 | |
202 | static const struct frame_unwind sparc64fbsd_sigtramp_frame_unwind = | |
203 | { | |
204 | SIGTRAMP_FRAME, | |
205 | sparc64fbsd_sigtramp_frame_this_id, | |
206 | sparc64fbsd_sigtramp_frame_prev_register, | |
207 | NULL, | |
208 | sparc64fbsd_sigtramp_frame_sniffer | |
209 | }; | |
386c036b MK |
210 | \f |
211 | ||
8b39fe56 MK |
212 | static void |
213 | sparc64fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) | |
214 | { | |
762c360d MK |
215 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
216 | ||
ae036357 MK |
217 | tdep->gregset = regset_alloc (gdbarch, sparc64fbsd_supply_gregset, |
218 | sparc64fbsd_collect_gregset); | |
762c360d MK |
219 | tdep->sizeof_gregset = 256; |
220 | ||
ae036357 MK |
221 | tdep->fpregset = regset_alloc (gdbarch, sparc64fbsd_supply_fpregset, |
222 | sparc64fbsd_collect_fpregset); | |
762c360d MK |
223 | tdep->sizeof_fpregset = 272; |
224 | ||
94afd7a6 | 225 | frame_unwind_append_unwinder (gdbarch, &sparc64fbsd_sigtramp_frame_unwind); |
386c036b MK |
226 | |
227 | sparc64_init_abi (info, gdbarch); | |
9e07977b MK |
228 | |
229 | /* FreeBSD/sparc64 has SVR4-style shared libraries. */ | |
230 | set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target); | |
231 | set_solib_svr4_fetch_link_map_offsets | |
232 | (gdbarch, svr4_lp64_fetch_link_map_offsets); | |
8b39fe56 MK |
233 | } |
234 | ||
235 | /* Provide a prototype to silence -Wmissing-prototypes. */ | |
236 | void _initialize_sparc64fbsd_tdep (void); | |
237 | ||
238 | void | |
239 | _initialize_sparc64fbsd_tdep (void) | |
240 | { | |
241 | gdbarch_register_osabi (bfd_arch_sparc, bfd_mach_sparc_v9, | |
242 | GDB_OSABI_FREEBSD_ELF, sparc64fbsd_init_abi); | |
8b39fe56 | 243 | } |