1 /* Target-dependent code for FreeBSD/sparc64.
3 Copyright (C) 2003-2015 Free Software Foundation, Inc.
5 This file is part of GDB.
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 3 of the License, or
10 (at your option) any later version.
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.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 #include "frame-unwind.h"
28 #include "trad-frame.h"
30 #include "sparc64-tdep.h"
31 #include "fbsd-tdep.h"
32 #include "solib-svr4.h"
34 /* From <machine/reg.h>. */
35 const struct sparc_gregmap sparc64fbsd_gregmap =
37 26 * 8, /* "tstate" */
50 sparc64fbsd_supply_gregset (const struct regset *regset,
51 struct regcache *regcache,
52 int regnum, const void *gregs, size_t len)
54 sparc64_supply_gregset (&sparc64fbsd_gregmap, regcache, regnum, gregs);
58 sparc64fbsd_collect_gregset (const struct regset *regset,
59 const struct regcache *regcache,
60 int regnum, void *gregs, size_t len)
62 sparc64_collect_gregset (&sparc64fbsd_gregmap, regcache, regnum, gregs);
66 sparc64fbsd_supply_fpregset (const struct regset *regset,
67 struct regcache *regcache,
68 int regnum, const void *fpregs, size_t len)
70 sparc64_supply_fpregset (&sparc64_bsd_fpregmap, regcache, regnum, fpregs);
74 sparc64fbsd_collect_fpregset (const struct regset *regset,
75 const struct regcache *regcache,
76 int regnum, void *fpregs, size_t len)
78 sparc64_collect_fpregset (&sparc64_bsd_fpregmap, regcache, regnum, fpregs);
82 /* Signal trampolines. */
85 sparc64fbsd_pc_in_sigtramp (CORE_ADDR pc, const char *name)
87 return (name && strcmp (name, "__sigtramp") == 0);
90 static struct sparc_frame_cache *
91 sparc64fbsd_sigtramp_frame_cache (struct frame_info *this_frame,
94 struct sparc_frame_cache *cache;
95 CORE_ADDR addr, mcontext_addr, sp;
102 cache = sparc_frame_cache (this_frame, this_cache);
103 gdb_assert (cache == *this_cache);
105 cache->saved_regs = trad_frame_alloc_saved_regs (this_frame);
107 /* The third argument is a pointer to an instance of `ucontext_t',
108 which has a member `uc_mcontext' that contains the saved
110 addr = get_frame_register_unsigned (this_frame, SPARC_O2_REGNUM);
111 mcontext_addr = addr + 64;
113 /* The following registers travel in the `mc_local' slots of
115 addr = mcontext_addr + 16 * 8;
116 cache->saved_regs[SPARC64_FPRS_REGNUM].addr = addr + 0 * 8;
117 cache->saved_regs[SPARC64_FSR_REGNUM].addr = addr + 1 * 8;
119 /* The following registers travel in the `mc_in' slots of
121 addr = mcontext_addr + 24 * 8;
122 cache->saved_regs[SPARC64_NPC_REGNUM].addr = addr + 0 * 8;
123 cache->saved_regs[SPARC64_PC_REGNUM].addr = addr + 1 * 8;
124 cache->saved_regs[SPARC64_STATE_REGNUM].addr = addr + 2 * 8;
125 cache->saved_regs[SPARC64_Y_REGNUM].addr = addr + 4 * 8;
127 /* The `global' and `out' registers travel in the `mc_global' and
128 `mc_out' slots of `mcontext_t', except for %g0. Since %g0 is
129 always zero, keep the identity encoding. */
130 for (regnum = SPARC_G1_REGNUM, addr = mcontext_addr + 8;
131 regnum <= SPARC_O7_REGNUM; regnum++, addr += 8)
132 cache->saved_regs[regnum].addr = addr;
134 /* The `local' and `in' registers have been saved in the register
136 addr = cache->saved_regs[SPARC_SP_REGNUM].addr;
137 sp = get_frame_memory_unsigned (this_frame, addr, 8);
138 for (regnum = SPARC_L0_REGNUM, addr = sp + BIAS;
139 regnum <= SPARC_I7_REGNUM; regnum++, addr += 8)
140 cache->saved_regs[regnum].addr = addr;
142 /* The floating-point registers are only saved if the FEF bit in
143 %fprs has been set. */
145 #define FPRS_FEF (1 << 2)
147 addr = cache->saved_regs[SPARC64_FPRS_REGNUM].addr;
148 fprs = get_frame_memory_unsigned (this_frame, addr, 8);
151 for (regnum = SPARC_F0_REGNUM, addr = mcontext_addr + 32 * 8;
152 regnum <= SPARC_F31_REGNUM; regnum++, addr += 4)
153 cache->saved_regs[regnum].addr = addr;
155 for (regnum = SPARC64_F32_REGNUM;
156 regnum <= SPARC64_F62_REGNUM; regnum++, addr += 8)
157 cache->saved_regs[regnum].addr = addr;
164 sparc64fbsd_sigtramp_frame_this_id (struct frame_info *this_frame,
166 struct frame_id *this_id)
168 struct sparc_frame_cache *cache =
169 sparc64fbsd_sigtramp_frame_cache (this_frame, this_cache);
171 (*this_id) = frame_id_build (cache->base, cache->pc);
174 static struct value *
175 sparc64fbsd_sigtramp_frame_prev_register (struct frame_info *this_frame,
176 void **this_cache, int regnum)
178 struct sparc_frame_cache *cache =
179 sparc64fbsd_sigtramp_frame_cache (this_frame, this_cache);
181 return trad_frame_get_prev_register (this_frame, cache->saved_regs, regnum);
185 sparc64fbsd_sigtramp_frame_sniffer (const struct frame_unwind *self,
186 struct frame_info *this_frame,
189 CORE_ADDR pc = get_frame_pc (this_frame);
192 find_pc_partial_function (pc, &name, NULL, NULL);
193 if (sparc64fbsd_pc_in_sigtramp (pc, name))
199 static const struct frame_unwind sparc64fbsd_sigtramp_frame_unwind =
202 default_frame_unwind_stop_reason,
203 sparc64fbsd_sigtramp_frame_this_id,
204 sparc64fbsd_sigtramp_frame_prev_register,
206 sparc64fbsd_sigtramp_frame_sniffer
210 static const struct regset sparc64fbsd_gregset =
212 NULL, sparc64fbsd_supply_gregset, sparc64fbsd_collect_gregset
215 static const struct regset sparc64fbsd_fpregset =
217 NULL, sparc64fbsd_supply_fpregset, sparc64fbsd_collect_fpregset
221 sparc64fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
223 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
225 /* Generic FreeBSD support. */
226 fbsd_init_abi (info, gdbarch);
228 tdep->gregset = &sparc64fbsd_gregset;
229 tdep->sizeof_gregset = 256;
231 tdep->fpregset = &sparc64fbsd_fpregset;
232 tdep->sizeof_fpregset = 272;
234 frame_unwind_append_unwinder (gdbarch, &sparc64fbsd_sigtramp_frame_unwind);
236 sparc64_init_abi (info, gdbarch);
238 /* FreeBSD/sparc64 has SVR4-style shared libraries. */
239 set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
240 set_solib_svr4_fetch_link_map_offsets
241 (gdbarch, svr4_lp64_fetch_link_map_offsets);
244 /* Provide a prototype to silence -Wmissing-prototypes. */
245 void _initialize_sparc64fbsd_tdep (void);
248 _initialize_sparc64fbsd_tdep (void)
250 gdbarch_register_osabi (bfd_arch_sparc, bfd_mach_sparc_v9,
251 GDB_OSABI_FREEBSD_ELF, sparc64fbsd_init_abi);