Commit | Line | Data |
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386c036b MK |
1 | /* Target-dependent code for NetBSD/sparc. |
2 | ||
3 | Copyright 2002, 2003, 2004 Free Software Foundation, Inc. | |
9ce5c36a JT |
4 | Contributed by Wasabi Systems, Inc. |
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 | |
10 | the Free Software Foundation; either version 2 of the License, or | |
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 | |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 59 Temple Place - Suite 330, | |
21 | Boston, MA 02111-1307, USA. */ | |
22 | ||
23 | #include "defs.h" | |
386c036b MK |
24 | #include "floatformat.h" |
25 | #include "frame.h" | |
26 | #include "frame-unwind.h" | |
9ce5c36a | 27 | #include "gdbcore.h" |
9ce5c36a | 28 | #include "osabi.h" |
386c036b | 29 | #include "regcache.h" |
4e7b0cd3 | 30 | #include "regset.h" |
386c036b MK |
31 | #include "solib-svr4.h" |
32 | #include "symtab.h" | |
33 | #include "trad-frame.h" | |
9ce5c36a | 34 | |
386c036b | 35 | #include "gdb_assert.h" |
f6ad61e3 MK |
36 | #include "gdb_string.h" |
37 | ||
c139e7d9 | 38 | #include "sparc-tdep.h" |
9ce5c36a JT |
39 | #include "nbsd-tdep.h" |
40 | ||
386c036b | 41 | const struct sparc_gregset sparc32nbsd_gregset = |
9ce5c36a | 42 | { |
386c036b MK |
43 | 0 * 4, /* %psr */ |
44 | 1 * 4, /* %pc */ | |
45 | 2 * 4, /* %npc */ | |
46 | 3 * 4, /* %y */ | |
47 | -1, /* %wim */ | |
48 | -1, /* %tbr */ | |
49 | 5 * 4, /* %g1 */ | |
50 | -1 /* %l0 */ | |
51 | }; | |
9ce5c36a | 52 | |
9ce5c36a | 53 | static void |
4e7b0cd3 MK |
54 | sparc32nbsd_supply_gregset (const struct regset *regset, |
55 | struct regcache *regcache, | |
56 | int regnum, const void *gregs, size_t len) | |
9ce5c36a | 57 | { |
4e7b0cd3 | 58 | sparc32_supply_gregset (regset->descr, regcache, regnum, gregs); |
c8e737d5 MK |
59 | |
60 | /* Traditional NetBSD core files don't use multiple register sets. | |
61 | Instead, the general-purpose and floating-point registers are | |
62 | lumped together in a single section. */ | |
63 | if (len >= 212) | |
64 | sparc32_supply_fpregset (regcache, regnum, (const char *) gregs + 80); | |
9ce5c36a JT |
65 | } |
66 | ||
4e7b0cd3 MK |
67 | static void |
68 | sparc32nbsd_supply_fpregset (const struct regset *regset, | |
69 | struct regcache *regcache, | |
70 | int regnum, const void *fpregs, size_t len) | |
9ce5c36a | 71 | { |
4e7b0cd3 MK |
72 | sparc32_supply_fpregset (regcache, regnum, fpregs); |
73 | } | |
9ce5c36a | 74 | |
386c036b MK |
75 | \f |
76 | /* Signal trampolines. */ | |
77 | ||
78 | /* The following variables describe the location of an on-stack signal | |
79 | trampoline. The current values correspond to the memory layout for | |
80 | NetBSD 1.3 and up. These shouldn't be necessary for NetBSD 2.0 and | |
81 | up, since NetBSD uses signal trampolines provided by libc now. */ | |
9ce5c36a | 82 | |
386c036b MK |
83 | static const CORE_ADDR sparc32nbsd_sigtramp_start = 0xeffffef0; |
84 | static const CORE_ADDR sparc32nbsd_sigtramp_end = 0xeffffff0; | |
9ce5c36a JT |
85 | |
86 | static int | |
386c036b MK |
87 | sparc32nbsd_pc_in_sigtramp (CORE_ADDR pc, char *name) |
88 | { | |
89 | if (pc >= sparc32nbsd_sigtramp_start && pc < sparc32nbsd_sigtramp_end) | |
90 | return 1; | |
91 | ||
92 | return nbsd_pc_in_sigtramp (pc, name); | |
93 | } | |
94 | ||
566626fa MK |
95 | struct trad_frame_saved_reg * |
96 | sparc32nbsd_sigcontext_saved_regs (struct frame_info *next_frame) | |
9ce5c36a | 97 | { |
566626fa | 98 | struct trad_frame_saved_reg *saved_regs; |
386c036b | 99 | CORE_ADDR addr, sigcontext_addr; |
386c036b | 100 | int regnum, delta; |
566626fa | 101 | ULONGEST psr; |
9ce5c36a | 102 | |
566626fa | 103 | saved_regs = trad_frame_alloc_saved_regs (next_frame); |
9ce5c36a | 104 | |
566626fa MK |
105 | /* We find the appropriate instance of `struct sigcontext' at a |
106 | fixed offset in the signal frame. */ | |
107 | addr = frame_unwind_register_unsigned (next_frame, SPARC_FP_REGNUM); | |
108 | sigcontext_addr = addr + 64 + 16; | |
9ce5c36a | 109 | |
386c036b MK |
110 | /* The registers are saved in bits and pieces scattered all over the |
111 | place. The code below records their location on the assumption | |
112 | that the part of the signal trampoline that saves the state has | |
113 | been executed. */ | |
9ce5c36a | 114 | |
566626fa MK |
115 | saved_regs[SPARC_SP_REGNUM].addr = sigcontext_addr + 8; |
116 | saved_regs[SPARC32_PC_REGNUM].addr = sigcontext_addr + 12; | |
117 | saved_regs[SPARC32_NPC_REGNUM].addr = sigcontext_addr + 16; | |
118 | saved_regs[SPARC32_PSR_REGNUM].addr = sigcontext_addr + 20; | |
119 | saved_regs[SPARC_G1_REGNUM].addr = sigcontext_addr + 24; | |
120 | saved_regs[SPARC_O0_REGNUM].addr = sigcontext_addr + 28; | |
386c036b MK |
121 | |
122 | /* The remaining `global' registers and %y are saved in the `local' | |
123 | registers. */ | |
124 | delta = SPARC_L0_REGNUM - SPARC_G0_REGNUM; | |
125 | for (regnum = SPARC_G2_REGNUM; regnum <= SPARC_G7_REGNUM; regnum++) | |
566626fa MK |
126 | saved_regs[regnum].realreg = regnum + delta; |
127 | saved_regs[SPARC32_Y_REGNUM].realreg = SPARC_L1_REGNUM; | |
386c036b MK |
128 | |
129 | /* The remaining `out' registers can be found in the current frame's | |
130 | `in' registers. */ | |
131 | delta = SPARC_I0_REGNUM - SPARC_O0_REGNUM; | |
132 | for (regnum = SPARC_O1_REGNUM; regnum <= SPARC_O5_REGNUM; regnum++) | |
566626fa MK |
133 | saved_regs[regnum].realreg = regnum + delta; |
134 | saved_regs[SPARC_O7_REGNUM].realreg = SPARC_I7_REGNUM; | |
386c036b MK |
135 | |
136 | /* The `local' and `in' registers have been saved in the register | |
137 | save area. */ | |
566626fa | 138 | addr = saved_regs[SPARC_SP_REGNUM].addr; |
386c036b MK |
139 | addr = get_frame_memory_unsigned (next_frame, addr, 4); |
140 | for (regnum = SPARC_L0_REGNUM; | |
141 | regnum <= SPARC_I7_REGNUM; regnum++, addr += 4) | |
566626fa | 142 | saved_regs[regnum].addr = addr; |
386c036b | 143 | |
1c800673 MK |
144 | /* Handle StackGhost. */ |
145 | { | |
146 | ULONGEST wcookie = sparc_fetch_wcookie (); | |
147 | ||
148 | if (wcookie != 0) | |
149 | { | |
150 | ULONGEST i7; | |
151 | ||
152 | addr = saved_regs[SPARC_I7_REGNUM].addr; | |
153 | i7 = get_frame_memory_unsigned (next_frame, addr, 4); | |
154 | trad_frame_set_value (saved_regs, SPARC_I7_REGNUM, i7 ^ wcookie); | |
155 | } | |
156 | } | |
157 | ||
386c036b MK |
158 | /* The floating-point registers are only saved if the EF bit in %prs |
159 | has been set. */ | |
160 | ||
161 | #define PSR_EF 0x00001000 | |
162 | ||
566626fa | 163 | addr = saved_regs[SPARC32_PSR_REGNUM].addr; |
386c036b MK |
164 | psr = get_frame_memory_unsigned (next_frame, addr, 4); |
165 | if (psr & PSR_EF) | |
166 | { | |
167 | CORE_ADDR sp; | |
168 | ||
169 | sp = frame_unwind_register_unsigned (next_frame, SPARC_SP_REGNUM); | |
566626fa | 170 | saved_regs[SPARC32_FSR_REGNUM].addr = sp + 96; |
386c036b MK |
171 | for (regnum = SPARC_F0_REGNUM, addr = sp + 96 + 8; |
172 | regnum <= SPARC_F31_REGNUM; regnum++, addr += 4) | |
566626fa MK |
173 | saved_regs[regnum].addr = addr; |
174 | } | |
175 | ||
176 | return saved_regs; | |
177 | } | |
178 | ||
179 | static struct sparc_frame_cache * | |
180 | sparc32nbsd_sigcontext_frame_cache (struct frame_info *next_frame, | |
181 | void **this_cache) | |
182 | { | |
183 | struct sparc_frame_cache *cache; | |
184 | CORE_ADDR addr; | |
185 | ||
186 | if (*this_cache) | |
187 | return *this_cache; | |
188 | ||
189 | cache = sparc_frame_cache (next_frame, this_cache); | |
190 | gdb_assert (cache == *this_cache); | |
191 | ||
192 | /* If we couldn't find the frame's function, we're probably dealing | |
193 | with an on-stack signal trampoline. */ | |
194 | if (cache->pc == 0) | |
195 | { | |
196 | cache->pc = sparc32nbsd_sigtramp_start; | |
197 | ||
198 | /* Since we couldn't find the frame's function, the cache was | |
199 | initialized under the assumption that we're frameless. */ | |
200 | cache->frameless_p = 0; | |
201 | addr = frame_unwind_register_unsigned (next_frame, SPARC_FP_REGNUM); | |
202 | cache->base = addr; | |
386c036b MK |
203 | } |
204 | ||
566626fa MK |
205 | cache->saved_regs = sparc32nbsd_sigcontext_saved_regs (next_frame); |
206 | ||
386c036b | 207 | return cache; |
9ce5c36a JT |
208 | } |
209 | ||
386c036b MK |
210 | static void |
211 | sparc32nbsd_sigcontext_frame_this_id (struct frame_info *next_frame, | |
212 | void **this_cache, | |
213 | struct frame_id *this_id) | |
214 | { | |
215 | struct sparc_frame_cache *cache = | |
216 | sparc32nbsd_sigcontext_frame_cache (next_frame, this_cache); | |
217 | ||
218 | (*this_id) = frame_id_build (cache->base, cache->pc); | |
219 | } | |
220 | ||
221 | static void | |
222 | sparc32nbsd_sigcontext_frame_prev_register (struct frame_info *next_frame, | |
223 | void **this_cache, | |
224 | int regnum, int *optimizedp, | |
225 | enum lval_type *lvalp, | |
226 | CORE_ADDR *addrp, | |
227 | int *realnump, void *valuep) | |
9ce5c36a | 228 | { |
386c036b MK |
229 | struct sparc_frame_cache *cache = |
230 | sparc32nbsd_sigcontext_frame_cache (next_frame, this_cache); | |
9ce5c36a | 231 | |
386c036b MK |
232 | trad_frame_prev_register (next_frame, cache->saved_regs, regnum, |
233 | optimizedp, lvalp, addrp, realnump, valuep); | |
234 | } | |
9ce5c36a | 235 | |
386c036b MK |
236 | static const struct frame_unwind sparc32nbsd_sigcontext_frame_unwind = |
237 | { | |
238 | SIGTRAMP_FRAME, | |
239 | sparc32nbsd_sigcontext_frame_this_id, | |
240 | sparc32nbsd_sigcontext_frame_prev_register | |
241 | }; | |
9ce5c36a | 242 | |
386c036b MK |
243 | static const struct frame_unwind * |
244 | sparc32nbsd_sigtramp_frame_sniffer (struct frame_info *next_frame) | |
245 | { | |
246 | CORE_ADDR pc = frame_pc_unwind (next_frame); | |
247 | char *name; | |
9ce5c36a | 248 | |
386c036b MK |
249 | find_pc_partial_function (pc, &name, NULL, NULL); |
250 | if (sparc32nbsd_pc_in_sigtramp (pc, name)) | |
251 | { | |
252 | if (name == NULL || strncmp (name, "__sigtramp_sigcontext", 21)) | |
253 | return &sparc32nbsd_sigcontext_frame_unwind; | |
254 | } | |
255 | ||
256 | return NULL; | |
9ce5c36a | 257 | } |
386c036b MK |
258 | \f |
259 | ||
260 | /* Return non-zero if we are in a shared library trampoline code stub. */ | |
9ce5c36a JT |
261 | |
262 | static int | |
263 | sparcnbsd_aout_in_solib_call_trampoline (CORE_ADDR pc, char *name) | |
264 | { | |
386c036b | 265 | return (name && !strcmp (name, "_DYNAMIC")); |
9ce5c36a JT |
266 | } |
267 | ||
268 | static void | |
386c036b | 269 | sparc32nbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) |
9ce5c36a | 270 | { |
4e7b0cd3 MK |
271 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
272 | ||
386c036b MK |
273 | /* NetBSD doesn't support the 128-bit `long double' from the psABI. */ |
274 | set_gdbarch_long_double_bit (gdbarch, 64); | |
275 | set_gdbarch_long_double_format (gdbarch, &floatformat_ieee_double_big); | |
276 | ||
617a4cba JB |
277 | tdep->gregset = regset_alloc (gdbarch, &sparc32nbsd_gregset, |
278 | sparc32nbsd_supply_gregset, NULL); | |
c8e737d5 | 279 | tdep->sizeof_gregset = 20 * 4; |
4e7b0cd3 | 280 | |
617a4cba JB |
281 | tdep->fpregset = regset_alloc (gdbarch, NULL, |
282 | sparc32nbsd_supply_fpregset, NULL); | |
c8e737d5 | 283 | tdep->sizeof_fpregset = 33 * 4; |
4e7b0cd3 | 284 | |
386c036b | 285 | frame_unwind_append_sniffer (gdbarch, sparc32nbsd_sigtramp_frame_sniffer); |
9ce5c36a JT |
286 | } |
287 | ||
288 | static void | |
386c036b | 289 | sparc32nbsd_aout_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) |
9ce5c36a | 290 | { |
386c036b | 291 | sparc32nbsd_init_abi (info, gdbarch); |
9ce5c36a | 292 | |
386c036b MK |
293 | set_gdbarch_in_solib_call_trampoline |
294 | (gdbarch, sparcnbsd_aout_in_solib_call_trampoline); | |
9ce5c36a JT |
295 | } |
296 | ||
297 | static void | |
386c036b | 298 | sparc32nbsd_elf_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) |
9ce5c36a | 299 | { |
386c036b | 300 | sparc32nbsd_init_abi (info, gdbarch); |
9ce5c36a | 301 | |
386c036b MK |
302 | set_solib_svr4_fetch_link_map_offsets |
303 | (gdbarch, nbsd_ilp32_solib_svr4_fetch_link_map_offsets); | |
9ce5c36a JT |
304 | } |
305 | ||
306 | static enum gdb_osabi | |
307 | sparcnbsd_aout_osabi_sniffer (bfd *abfd) | |
308 | { | |
309 | if (strcmp (bfd_get_target (abfd), "a.out-sparc-netbsd") == 0) | |
310 | return GDB_OSABI_NETBSD_AOUT; | |
311 | ||
312 | return GDB_OSABI_UNKNOWN; | |
313 | } | |
314 | ||
7e5e9f88 MK |
315 | /* OpenBSD uses the traditional NetBSD core file format, even for |
316 | ports that use ELF. Therefore, if the default OS ABI is OpenBSD | |
317 | ELF, we return that instead of NetBSD a.out. This is mainly for | |
318 | the benfit of OpenBSD/sparc64, which inherits the sniffer below | |
319 | since we include this file for an OpenBSD/sparc64 target. For | |
320 | OpenBSD/sparc, the NetBSD a.out OS ABI is probably similar enough | |
321 | to both the OpenBSD a.out and the OpenBSD ELF OS ABI. */ | |
322 | #if defined (GDB_OSABI_DEFAULT) && (GDB_OSABI_DEFAULT == GDB_OSABI_OPENBSD_ELF) | |
323 | #define GDB_OSABI_NETBSD_CORE GDB_OSABI_OPENBSD_ELF | |
324 | #else | |
325 | #define GDB_OSABI_NETBSD_CORE GDB_OSABI_NETBSD_AOUT | |
326 | #endif | |
327 | ||
89aac506 MK |
328 | static enum gdb_osabi |
329 | sparcnbsd_core_osabi_sniffer (bfd *abfd) | |
330 | { | |
331 | if (strcmp (bfd_get_target (abfd), "netbsd-core") == 0) | |
7e5e9f88 | 332 | return GDB_OSABI_NETBSD_CORE; |
89aac506 MK |
333 | |
334 | return GDB_OSABI_UNKNOWN; | |
335 | } | |
336 | ||
386c036b MK |
337 | \f |
338 | /* Provide a prototype to silence -Wmissing-prototypes. */ | |
339 | void _initialize_sparcnbsd_tdep (void); | |
340 | ||
9ce5c36a JT |
341 | void |
342 | _initialize_sparnbsd_tdep (void) | |
343 | { | |
344 | gdbarch_register_osabi_sniffer (bfd_arch_sparc, bfd_target_aout_flavour, | |
345 | sparcnbsd_aout_osabi_sniffer); | |
346 | ||
adf93a2f MK |
347 | /* BFD doesn't set a flavour for NetBSD style a.out core files. */ |
348 | gdbarch_register_osabi_sniffer (bfd_arch_sparc, bfd_target_unknown_flavour, | |
89aac506 MK |
349 | sparcnbsd_core_osabi_sniffer); |
350 | ||
05816f70 | 351 | gdbarch_register_osabi (bfd_arch_sparc, 0, GDB_OSABI_NETBSD_AOUT, |
386c036b | 352 | sparc32nbsd_aout_init_abi); |
05816f70 | 353 | gdbarch_register_osabi (bfd_arch_sparc, 0, GDB_OSABI_NETBSD_ELF, |
386c036b | 354 | sparc32nbsd_elf_init_abi); |
9ce5c36a | 355 | } |