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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" | |
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" | |
35 | ||
36 | /* From <machine/reg.h>. */ | |
386c036b | 37 | const struct sparc_gregset sparc64fbsd_gregset = |
8b39fe56 | 38 | { |
386c036b MK |
39 | 26 * 8, /* "tstate" */ |
40 | 25 * 8, /* %pc */ | |
41 | 24 * 8, /* %npc */ | |
42 | 28 * 8, /* %y */ | |
43 | 16 * 8, /* %fprs */ | |
44 | -1, | |
45 | 1 * 8, /* %g1 */ | |
46 | -1, /* %l0 */ | |
47 | 8 /* sizeof (%y) */ | |
48 | }; | |
8b39fe56 MK |
49 | \f |
50 | ||
386c036b MK |
51 | /* Size of `struct reg' and `struct fpreg'. */ |
52 | static const int sparc64fbsd_sizeof_struct_reg = 256; | |
53 | static const int sparc64fbsd_sizeof_struct_fpreg = 272; | |
54 | ||
8b39fe56 MK |
55 | static void |
56 | fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which, | |
57 | CORE_ADDR ignore) | |
58 | { | |
59 | switch (which) | |
60 | { | |
61 | case 0: /* Integer registers */ | |
62 | if (core_reg_size != sparc64fbsd_sizeof_struct_reg) | |
63 | warning ("Wrong size register set in core file."); | |
64 | else | |
386c036b MK |
65 | sparc64_supply_gregset (&sparc64fbsd_gregset, current_regcache, |
66 | -1, core_reg_sect); | |
8b39fe56 MK |
67 | break; |
68 | ||
69 | case 2: /* Floating pointer registers */ | |
70 | if (core_reg_size != sparc64fbsd_sizeof_struct_fpreg) | |
71 | warning ("Wrong size FP register set in core file."); | |
72 | else | |
386c036b | 73 | sparc64_supply_fpregset (current_regcache, -1, core_reg_sect); |
8b39fe56 MK |
74 | break; |
75 | ||
76 | default: | |
77 | /* Don't know what kind of register request this is; just ignore it. */ | |
78 | break; | |
79 | } | |
80 | } | |
81 | ||
82 | static struct core_fns sparc64fbsd_core_fns = | |
83 | { | |
84 | bfd_target_elf_flavour, /* core_flavour */ | |
85 | default_check_format, /* check_format */ | |
86 | default_core_sniffer, /* core_sniffer */ | |
87 | fetch_core_registers, /* core_read_registers */ | |
88 | NULL | |
89 | }; | |
90 | \f | |
91 | ||
386c036b MK |
92 | /* Signal trampolines. */ |
93 | ||
94 | static int | |
95 | sparc64fbsd_pc_in_sigtramp (CORE_ADDR pc, char *name) | |
96 | { | |
97 | return (name && strcmp (name, "__sigtramp") == 0); | |
98 | } | |
99 | ||
100 | static struct sparc_frame_cache * | |
101 | sparc64fbsd_sigtramp_frame_cache (struct frame_info *next_frame, | |
102 | void **this_cache) | |
103 | { | |
104 | struct sparc_frame_cache *cache; | |
105 | CORE_ADDR addr, mcontext_addr, sp; | |
106 | LONGEST fprs; | |
107 | int regnum; | |
108 | ||
109 | if (*this_cache) | |
110 | return *this_cache; | |
111 | ||
112 | cache = sparc_frame_cache (next_frame, this_cache); | |
113 | gdb_assert (cache == *this_cache); | |
114 | ||
115 | cache->saved_regs = trad_frame_alloc_saved_regs (next_frame); | |
116 | ||
117 | /* The third argument is a pointer to an instance of `ucontext_t', | |
118 | which has a member `uc_mcontext' that contains the saved | |
119 | registers. */ | |
120 | addr = frame_unwind_register_unsigned (next_frame, SPARC_O2_REGNUM); | |
121 | mcontext_addr = addr + 64; | |
122 | ||
123 | /* The following registers travel in the `mc_local' slots of | |
124 | `mcontext_t'. */ | |
125 | addr = mcontext_addr + 16 * 8; | |
126 | cache->saved_regs[SPARC64_FPRS_REGNUM].addr = addr + 0 * 8; | |
127 | cache->saved_regs[SPARC64_FSR_REGNUM].addr = addr + 1 * 8; | |
128 | ||
129 | /* The following registers travel in the `mc_in' slots of | |
130 | `mcontext_t'. */ | |
131 | addr = mcontext_addr + 24 * 8; | |
132 | cache->saved_regs[SPARC64_NPC_REGNUM].addr = addr + 0 * 8; | |
133 | cache->saved_regs[SPARC64_PC_REGNUM].addr = addr + 1 * 8; | |
134 | cache->saved_regs[SPARC64_STATE_REGNUM].addr = addr + 2 * 8; | |
135 | cache->saved_regs[SPARC64_Y_REGNUM].addr = addr + 4 * 8; | |
136 | ||
137 | /* The `global' and `out' registers travel in the `mc_global' and | |
138 | `mc_out' slots of `mcontext_t', except for %g0. Since %g0 is | |
139 | always zero, keep the identity encoding. */ | |
140 | for (regnum = SPARC_G1_REGNUM, addr = mcontext_addr + 8; | |
141 | regnum <= SPARC_O7_REGNUM; regnum++, addr += 8) | |
142 | cache->saved_regs[regnum].addr = addr; | |
143 | ||
144 | /* The `local' and `in' registers have been saved in the register | |
145 | save area. */ | |
146 | addr = cache->saved_regs[SPARC_SP_REGNUM].addr; | |
147 | sp = get_frame_memory_unsigned (next_frame, addr, 8); | |
148 | for (regnum = SPARC_L0_REGNUM, addr = sp + BIAS; | |
149 | regnum <= SPARC_I7_REGNUM; regnum++, addr += 8) | |
150 | cache->saved_regs[regnum].addr = addr; | |
151 | ||
152 | /* The floating-point registers are only saved if the FEF bit in | |
153 | %fprs has been set. */ | |
154 | ||
155 | #define FPRS_FEF (1 << 2) | |
156 | ||
157 | addr = cache->saved_regs[SPARC64_FPRS_REGNUM].addr; | |
158 | fprs = get_frame_memory_unsigned (next_frame, addr, 8); | |
159 | if (fprs & FPRS_FEF) | |
160 | { | |
161 | for (regnum = SPARC_F0_REGNUM, addr = mcontext_addr + 32 * 8; | |
162 | regnum <= SPARC_F31_REGNUM; regnum++, addr += 4) | |
163 | cache->saved_regs[regnum].addr = addr; | |
164 | ||
165 | for (regnum = SPARC64_F32_REGNUM; | |
166 | regnum <= SPARC64_F62_REGNUM; regnum++, addr += 8) | |
167 | cache->saved_regs[regnum].addr = addr; | |
168 | } | |
169 | ||
170 | return cache; | |
171 | } | |
172 | ||
173 | static void | |
174 | sparc64fbsd_sigtramp_frame_this_id (struct frame_info *next_frame, | |
175 | void **this_cache, | |
176 | struct frame_id *this_id) | |
177 | { | |
178 | struct sparc_frame_cache *cache = | |
179 | sparc64fbsd_sigtramp_frame_cache (next_frame, this_cache); | |
180 | ||
181 | (*this_id) = frame_id_build (cache->base, cache->pc); | |
182 | } | |
183 | ||
184 | static void | |
185 | sparc64fbsd_sigtramp_frame_prev_register (struct frame_info *next_frame, | |
186 | void **this_cache, | |
187 | int regnum, int *optimizedp, | |
188 | enum lval_type *lvalp, | |
189 | CORE_ADDR *addrp, | |
190 | int *realnump, void *valuep) | |
191 | { | |
192 | struct sparc_frame_cache *cache = | |
193 | sparc64fbsd_sigtramp_frame_cache (next_frame, this_cache); | |
194 | ||
195 | trad_frame_prev_register (next_frame, cache->saved_regs, regnum, | |
196 | optimizedp, lvalp, addrp, realnump, valuep); | |
197 | } | |
198 | ||
199 | static const struct frame_unwind sparc64fbsd_sigtramp_frame_unwind = | |
200 | { | |
201 | SIGTRAMP_FRAME, | |
202 | sparc64fbsd_sigtramp_frame_this_id, | |
203 | sparc64fbsd_sigtramp_frame_prev_register | |
204 | }; | |
205 | ||
206 | static const struct frame_unwind * | |
207 | sparc64fbsd_sigtramp_frame_sniffer (struct frame_info *next_frame) | |
208 | { | |
209 | CORE_ADDR pc = frame_pc_unwind (next_frame); | |
210 | char *name; | |
211 | ||
212 | find_pc_partial_function (pc, &name, NULL, NULL); | |
213 | if (sparc64fbsd_pc_in_sigtramp (pc, name)) | |
214 | return &sparc64fbsd_sigtramp_frame_unwind; | |
215 | ||
216 | return NULL; | |
217 | } | |
218 | \f | |
219 | ||
8b39fe56 MK |
220 | static void |
221 | sparc64fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) | |
222 | { | |
386c036b MK |
223 | set_gdbarch_pc_in_sigtramp (gdbarch, sparc64fbsd_pc_in_sigtramp); |
224 | frame_unwind_append_sniffer (gdbarch, sparc64fbsd_sigtramp_frame_sniffer); | |
225 | ||
226 | sparc64_init_abi (info, gdbarch); | |
8b39fe56 MK |
227 | } |
228 | ||
229 | /* Provide a prototype to silence -Wmissing-prototypes. */ | |
230 | void _initialize_sparc64fbsd_tdep (void); | |
231 | ||
232 | void | |
233 | _initialize_sparc64fbsd_tdep (void) | |
234 | { | |
235 | gdbarch_register_osabi (bfd_arch_sparc, bfd_mach_sparc_v9, | |
236 | GDB_OSABI_FREEBSD_ELF, sparc64fbsd_init_abi); | |
237 | ||
238 | add_core_fns (&sparc64fbsd_core_fns); | |
239 | } |