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8b39fe56 MK |
1 | /* Target-dependent code for FreeBSD/sparc64. |
2 | ||
386c036b | 3 | Copyright 2003, 2004 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 | { |
762c360d | 57 | sparc64_supply_gregset (regset->descr, regcache, regnum, gregs); |
8b39fe56 MK |
58 | } |
59 | ||
762c360d MK |
60 | static void |
61 | sparc64fbsd_supply_fpregset (const struct regset *regset, | |
62 | struct regcache *regcache, | |
63 | int regnum, const void *fpregs, size_t len) | |
8b39fe56 | 64 | { |
762c360d MK |
65 | sparc64_supply_fpregset (regcache, regnum, fpregs); |
66 | } | |
8b39fe56 MK |
67 | \f |
68 | ||
386c036b MK |
69 | /* Signal trampolines. */ |
70 | ||
71 | static int | |
72 | sparc64fbsd_pc_in_sigtramp (CORE_ADDR pc, char *name) | |
73 | { | |
74 | return (name && strcmp (name, "__sigtramp") == 0); | |
75 | } | |
76 | ||
77 | static struct sparc_frame_cache * | |
78 | sparc64fbsd_sigtramp_frame_cache (struct frame_info *next_frame, | |
79 | void **this_cache) | |
80 | { | |
81 | struct sparc_frame_cache *cache; | |
82 | CORE_ADDR addr, mcontext_addr, sp; | |
83 | LONGEST fprs; | |
84 | int regnum; | |
85 | ||
86 | if (*this_cache) | |
87 | return *this_cache; | |
88 | ||
89 | cache = sparc_frame_cache (next_frame, this_cache); | |
90 | gdb_assert (cache == *this_cache); | |
91 | ||
92 | cache->saved_regs = trad_frame_alloc_saved_regs (next_frame); | |
93 | ||
94 | /* The third argument is a pointer to an instance of `ucontext_t', | |
95 | which has a member `uc_mcontext' that contains the saved | |
96 | registers. */ | |
97 | addr = frame_unwind_register_unsigned (next_frame, SPARC_O2_REGNUM); | |
98 | mcontext_addr = addr + 64; | |
99 | ||
100 | /* The following registers travel in the `mc_local' slots of | |
101 | `mcontext_t'. */ | |
102 | addr = mcontext_addr + 16 * 8; | |
103 | cache->saved_regs[SPARC64_FPRS_REGNUM].addr = addr + 0 * 8; | |
104 | cache->saved_regs[SPARC64_FSR_REGNUM].addr = addr + 1 * 8; | |
105 | ||
106 | /* The following registers travel in the `mc_in' slots of | |
107 | `mcontext_t'. */ | |
108 | addr = mcontext_addr + 24 * 8; | |
109 | cache->saved_regs[SPARC64_NPC_REGNUM].addr = addr + 0 * 8; | |
110 | cache->saved_regs[SPARC64_PC_REGNUM].addr = addr + 1 * 8; | |
111 | cache->saved_regs[SPARC64_STATE_REGNUM].addr = addr + 2 * 8; | |
112 | cache->saved_regs[SPARC64_Y_REGNUM].addr = addr + 4 * 8; | |
113 | ||
114 | /* The `global' and `out' registers travel in the `mc_global' and | |
115 | `mc_out' slots of `mcontext_t', except for %g0. Since %g0 is | |
116 | always zero, keep the identity encoding. */ | |
117 | for (regnum = SPARC_G1_REGNUM, addr = mcontext_addr + 8; | |
118 | regnum <= SPARC_O7_REGNUM; regnum++, addr += 8) | |
119 | cache->saved_regs[regnum].addr = addr; | |
120 | ||
121 | /* The `local' and `in' registers have been saved in the register | |
122 | save area. */ | |
123 | addr = cache->saved_regs[SPARC_SP_REGNUM].addr; | |
124 | sp = get_frame_memory_unsigned (next_frame, addr, 8); | |
125 | for (regnum = SPARC_L0_REGNUM, addr = sp + BIAS; | |
126 | regnum <= SPARC_I7_REGNUM; regnum++, addr += 8) | |
127 | cache->saved_regs[regnum].addr = addr; | |
128 | ||
129 | /* The floating-point registers are only saved if the FEF bit in | |
130 | %fprs has been set. */ | |
131 | ||
132 | #define FPRS_FEF (1 << 2) | |
133 | ||
134 | addr = cache->saved_regs[SPARC64_FPRS_REGNUM].addr; | |
135 | fprs = get_frame_memory_unsigned (next_frame, addr, 8); | |
136 | if (fprs & FPRS_FEF) | |
137 | { | |
138 | for (regnum = SPARC_F0_REGNUM, addr = mcontext_addr + 32 * 8; | |
139 | regnum <= SPARC_F31_REGNUM; regnum++, addr += 4) | |
140 | cache->saved_regs[regnum].addr = addr; | |
141 | ||
142 | for (regnum = SPARC64_F32_REGNUM; | |
143 | regnum <= SPARC64_F62_REGNUM; regnum++, addr += 8) | |
144 | cache->saved_regs[regnum].addr = addr; | |
145 | } | |
146 | ||
147 | return cache; | |
148 | } | |
149 | ||
150 | static void | |
151 | sparc64fbsd_sigtramp_frame_this_id (struct frame_info *next_frame, | |
152 | void **this_cache, | |
153 | struct frame_id *this_id) | |
154 | { | |
155 | struct sparc_frame_cache *cache = | |
156 | sparc64fbsd_sigtramp_frame_cache (next_frame, this_cache); | |
157 | ||
158 | (*this_id) = frame_id_build (cache->base, cache->pc); | |
159 | } | |
160 | ||
161 | static void | |
162 | sparc64fbsd_sigtramp_frame_prev_register (struct frame_info *next_frame, | |
163 | void **this_cache, | |
164 | int regnum, int *optimizedp, | |
165 | enum lval_type *lvalp, | |
166 | CORE_ADDR *addrp, | |
167 | int *realnump, void *valuep) | |
168 | { | |
169 | struct sparc_frame_cache *cache = | |
170 | sparc64fbsd_sigtramp_frame_cache (next_frame, this_cache); | |
171 | ||
172 | trad_frame_prev_register (next_frame, cache->saved_regs, regnum, | |
173 | optimizedp, lvalp, addrp, realnump, valuep); | |
174 | } | |
175 | ||
176 | static const struct frame_unwind sparc64fbsd_sigtramp_frame_unwind = | |
177 | { | |
178 | SIGTRAMP_FRAME, | |
179 | sparc64fbsd_sigtramp_frame_this_id, | |
180 | sparc64fbsd_sigtramp_frame_prev_register | |
181 | }; | |
182 | ||
183 | static const struct frame_unwind * | |
184 | sparc64fbsd_sigtramp_frame_sniffer (struct frame_info *next_frame) | |
185 | { | |
186 | CORE_ADDR pc = frame_pc_unwind (next_frame); | |
187 | char *name; | |
188 | ||
189 | find_pc_partial_function (pc, &name, NULL, NULL); | |
190 | if (sparc64fbsd_pc_in_sigtramp (pc, name)) | |
191 | return &sparc64fbsd_sigtramp_frame_unwind; | |
192 | ||
193 | return NULL; | |
194 | } | |
195 | \f | |
196 | ||
8b39fe56 MK |
197 | static void |
198 | sparc64fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) | |
199 | { | |
762c360d MK |
200 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
201 | ||
202 | tdep->gregset = XMALLOC (struct regset); | |
203 | tdep->gregset->descr = &sparc64fbsd_gregset; | |
204 | tdep->gregset->supply_regset = sparc64fbsd_supply_gregset; | |
205 | tdep->sizeof_gregset = 256; | |
206 | ||
207 | tdep->fpregset = XMALLOC (struct regset); | |
208 | tdep->fpregset->supply_regset = sparc64fbsd_supply_fpregset; | |
209 | tdep->sizeof_fpregset = 272; | |
210 | ||
386c036b MK |
211 | set_gdbarch_pc_in_sigtramp (gdbarch, sparc64fbsd_pc_in_sigtramp); |
212 | frame_unwind_append_sniffer (gdbarch, sparc64fbsd_sigtramp_frame_sniffer); | |
213 | ||
214 | sparc64_init_abi (info, gdbarch); | |
8b39fe56 MK |
215 | } |
216 | ||
217 | /* Provide a prototype to silence -Wmissing-prototypes. */ | |
218 | void _initialize_sparc64fbsd_tdep (void); | |
219 | ||
220 | void | |
221 | _initialize_sparc64fbsd_tdep (void) | |
222 | { | |
223 | gdbarch_register_osabi (bfd_arch_sparc, bfd_mach_sparc_v9, | |
224 | GDB_OSABI_FREEBSD_ELF, sparc64fbsd_init_abi); | |
8b39fe56 | 225 | } |