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8b39fe56 MK |
1 | /* Target-dependent code for FreeBSD/sparc64. |
2 | ||
ae036357 | 3 | Copyright 2003, 2004, 2005 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 | |
9 | the Free Software Foundation; either version 2 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, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. */ | |
21 | ||
22 | #include "defs.h" | |
386c036b MK |
23 | #include "frame.h" |
24 | #include "frame-unwind.h" | |
8b39fe56 MK |
25 | #include "gdbcore.h" |
26 | #include "osabi.h" | |
27 | #include "regcache.h" | |
762c360d | 28 | #include "regset.h" |
8b39fe56 | 29 | #include "target.h" |
386c036b | 30 | #include "trad-frame.h" |
8b39fe56 | 31 | |
386c036b | 32 | #include "gdb_assert.h" |
8b39fe56 MK |
33 | #include "gdb_string.h" |
34 | ||
35 | #include "sparc64-tdep.h" | |
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 * | |
94 | sparc64fbsd_sigtramp_frame_cache (struct frame_info *next_frame, | |
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 | ||
105 | cache = sparc_frame_cache (next_frame, this_cache); | |
106 | gdb_assert (cache == *this_cache); | |
107 | ||
108 | cache->saved_regs = trad_frame_alloc_saved_regs (next_frame); | |
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. */ | |
113 | addr = frame_unwind_register_unsigned (next_frame, SPARC_O2_REGNUM); | |
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; | |
140 | sp = get_frame_memory_unsigned (next_frame, addr, 8); | |
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; | |
151 | fprs = get_frame_memory_unsigned (next_frame, addr, 8); | |
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 | |
167 | sparc64fbsd_sigtramp_frame_this_id (struct frame_info *next_frame, | |
168 | void **this_cache, | |
169 | struct frame_id *this_id) | |
170 | { | |
171 | struct sparc_frame_cache *cache = | |
172 | sparc64fbsd_sigtramp_frame_cache (next_frame, this_cache); | |
173 | ||
174 | (*this_id) = frame_id_build (cache->base, cache->pc); | |
175 | } | |
176 | ||
177 | static void | |
178 | sparc64fbsd_sigtramp_frame_prev_register (struct frame_info *next_frame, | |
179 | void **this_cache, | |
180 | int regnum, int *optimizedp, | |
181 | enum lval_type *lvalp, | |
182 | CORE_ADDR *addrp, | |
183 | int *realnump, void *valuep) | |
184 | { | |
185 | struct sparc_frame_cache *cache = | |
186 | sparc64fbsd_sigtramp_frame_cache (next_frame, this_cache); | |
187 | ||
1f67027d AC |
188 | trad_frame_get_prev_register (next_frame, cache->saved_regs, regnum, |
189 | optimizedp, lvalp, addrp, realnump, valuep); | |
386c036b MK |
190 | } |
191 | ||
192 | static const struct frame_unwind sparc64fbsd_sigtramp_frame_unwind = | |
193 | { | |
194 | SIGTRAMP_FRAME, | |
195 | sparc64fbsd_sigtramp_frame_this_id, | |
196 | sparc64fbsd_sigtramp_frame_prev_register | |
197 | }; | |
198 | ||
199 | static const struct frame_unwind * | |
200 | sparc64fbsd_sigtramp_frame_sniffer (struct frame_info *next_frame) | |
201 | { | |
202 | CORE_ADDR pc = frame_pc_unwind (next_frame); | |
203 | char *name; | |
204 | ||
205 | find_pc_partial_function (pc, &name, NULL, NULL); | |
206 | if (sparc64fbsd_pc_in_sigtramp (pc, name)) | |
207 | return &sparc64fbsd_sigtramp_frame_unwind; | |
208 | ||
209 | return NULL; | |
210 | } | |
211 | \f | |
212 | ||
8b39fe56 MK |
213 | static void |
214 | sparc64fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) | |
215 | { | |
762c360d MK |
216 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
217 | ||
ae036357 MK |
218 | tdep->gregset = regset_alloc (gdbarch, sparc64fbsd_supply_gregset, |
219 | sparc64fbsd_collect_gregset); | |
762c360d MK |
220 | tdep->sizeof_gregset = 256; |
221 | ||
ae036357 MK |
222 | tdep->fpregset = regset_alloc (gdbarch, sparc64fbsd_supply_fpregset, |
223 | sparc64fbsd_collect_fpregset); | |
762c360d MK |
224 | tdep->sizeof_fpregset = 272; |
225 | ||
386c036b MK |
226 | frame_unwind_append_sniffer (gdbarch, sparc64fbsd_sigtramp_frame_sniffer); |
227 | ||
228 | sparc64_init_abi (info, gdbarch); | |
8b39fe56 MK |
229 | } |
230 | ||
231 | /* Provide a prototype to silence -Wmissing-prototypes. */ | |
232 | void _initialize_sparc64fbsd_tdep (void); | |
233 | ||
234 | void | |
235 | _initialize_sparc64fbsd_tdep (void) | |
236 | { | |
237 | gdbarch_register_osabi (bfd_arch_sparc, bfd_mach_sparc_v9, | |
238 | GDB_OSABI_FREEBSD_ELF, sparc64fbsd_init_abi); | |
8b39fe56 | 239 | } |