1 /* Target-dependent code for FreeBSD/sparc64.
3 Copyright (C) 2003-2019 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"
35 /* From <machine/reg.h>. */
36 const struct sparc_gregmap sparc64fbsd_gregmap =
38 26 * 8, /* "tstate" */
51 sparc64fbsd_supply_gregset (const struct regset *regset,
52 struct regcache *regcache,
53 int regnum, const void *gregs, size_t len)
55 sparc64_supply_gregset (&sparc64fbsd_gregmap, regcache, regnum, gregs);
59 sparc64fbsd_collect_gregset (const struct regset *regset,
60 const struct regcache *regcache,
61 int regnum, void *gregs, size_t len)
63 sparc64_collect_gregset (&sparc64fbsd_gregmap, regcache, regnum, gregs);
67 sparc64fbsd_supply_fpregset (const struct regset *regset,
68 struct regcache *regcache,
69 int regnum, const void *fpregs, size_t len)
71 sparc64_supply_fpregset (&sparc64_bsd_fpregmap, regcache, regnum, fpregs);
75 sparc64fbsd_collect_fpregset (const struct regset *regset,
76 const struct regcache *regcache,
77 int regnum, void *fpregs, size_t len)
79 sparc64_collect_fpregset (&sparc64_bsd_fpregmap, regcache, regnum, fpregs);
83 /* Signal trampolines. */
86 sparc64fbsd_pc_in_sigtramp (CORE_ADDR pc, const char *name)
88 return (name && strcmp (name, "__sigtramp") == 0);
91 static struct sparc_frame_cache *
92 sparc64fbsd_sigtramp_frame_cache (struct frame_info *this_frame,
95 struct sparc_frame_cache *cache;
96 CORE_ADDR addr, mcontext_addr, sp;
101 return (struct sparc_frame_cache *) *this_cache;
103 cache = sparc_frame_cache (this_frame, this_cache);
104 gdb_assert (cache == *this_cache);
106 cache->saved_regs = trad_frame_alloc_saved_regs (this_frame);
108 /* The third argument is a pointer to an instance of `ucontext_t',
109 which has a member `uc_mcontext' that contains the saved
111 addr = get_frame_register_unsigned (this_frame, SPARC_O2_REGNUM);
112 mcontext_addr = addr + 64;
114 /* The following registers travel in the `mc_local' slots of
116 addr = mcontext_addr + 16 * 8;
117 cache->saved_regs[SPARC64_FPRS_REGNUM].addr = addr + 0 * 8;
118 cache->saved_regs[SPARC64_FSR_REGNUM].addr = addr + 1 * 8;
120 /* The following registers travel in the `mc_in' slots of
122 addr = mcontext_addr + 24 * 8;
123 cache->saved_regs[SPARC64_NPC_REGNUM].addr = addr + 0 * 8;
124 cache->saved_regs[SPARC64_PC_REGNUM].addr = addr + 1 * 8;
125 cache->saved_regs[SPARC64_STATE_REGNUM].addr = addr + 2 * 8;
126 cache->saved_regs[SPARC64_Y_REGNUM].addr = addr + 4 * 8;
128 /* The `global' and `out' registers travel in the `mc_global' and
129 `mc_out' slots of `mcontext_t', except for %g0. Since %g0 is
130 always zero, keep the identity encoding. */
131 for (regnum = SPARC_G1_REGNUM, addr = mcontext_addr + 8;
132 regnum <= SPARC_O7_REGNUM; regnum++, addr += 8)
133 cache->saved_regs[regnum].addr = addr;
135 /* The `local' and `in' registers have been saved in the register
137 addr = cache->saved_regs[SPARC_SP_REGNUM].addr;
138 sp = get_frame_memory_unsigned (this_frame, addr, 8);
139 for (regnum = SPARC_L0_REGNUM, addr = sp + BIAS;
140 regnum <= SPARC_I7_REGNUM; regnum++, addr += 8)
141 cache->saved_regs[regnum].addr = addr;
143 /* The floating-point registers are only saved if the FEF bit in
144 %fprs has been set. */
146 #define FPRS_FEF (1 << 2)
148 addr = cache->saved_regs[SPARC64_FPRS_REGNUM].addr;
149 fprs = get_frame_memory_unsigned (this_frame, addr, 8);
152 for (regnum = SPARC_F0_REGNUM, addr = mcontext_addr + 32 * 8;
153 regnum <= SPARC_F31_REGNUM; regnum++, addr += 4)
154 cache->saved_regs[regnum].addr = addr;
156 for (regnum = SPARC64_F32_REGNUM;
157 regnum <= SPARC64_F62_REGNUM; regnum++, addr += 8)
158 cache->saved_regs[regnum].addr = addr;
165 sparc64fbsd_sigtramp_frame_this_id (struct frame_info *this_frame,
167 struct frame_id *this_id)
169 struct sparc_frame_cache *cache =
170 sparc64fbsd_sigtramp_frame_cache (this_frame, this_cache);
172 (*this_id) = frame_id_build (cache->base, cache->pc);
175 static struct value *
176 sparc64fbsd_sigtramp_frame_prev_register (struct frame_info *this_frame,
177 void **this_cache, int regnum)
179 struct sparc_frame_cache *cache =
180 sparc64fbsd_sigtramp_frame_cache (this_frame, this_cache);
182 return trad_frame_get_prev_register (this_frame, cache->saved_regs, regnum);
186 sparc64fbsd_sigtramp_frame_sniffer (const struct frame_unwind *self,
187 struct frame_info *this_frame,
190 CORE_ADDR pc = get_frame_pc (this_frame);
193 find_pc_partial_function (pc, &name, NULL, NULL);
194 if (sparc64fbsd_pc_in_sigtramp (pc, name))
200 static const struct frame_unwind sparc64fbsd_sigtramp_frame_unwind =
203 default_frame_unwind_stop_reason,
204 sparc64fbsd_sigtramp_frame_this_id,
205 sparc64fbsd_sigtramp_frame_prev_register,
207 sparc64fbsd_sigtramp_frame_sniffer
211 static const struct regset sparc64fbsd_gregset =
213 NULL, sparc64fbsd_supply_gregset, sparc64fbsd_collect_gregset
216 static const struct regset sparc64fbsd_fpregset =
218 NULL, sparc64fbsd_supply_fpregset, sparc64fbsd_collect_fpregset
222 sparc64fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
224 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
226 /* Generic FreeBSD support. */
227 fbsd_init_abi (info, gdbarch);
229 tdep->gregset = &sparc64fbsd_gregset;
230 tdep->sizeof_gregset = 256;
232 tdep->fpregset = &sparc64fbsd_fpregset;
233 tdep->sizeof_fpregset = 272;
235 frame_unwind_append_unwinder (gdbarch, &sparc64fbsd_sigtramp_frame_unwind);
237 sparc64_init_abi (info, gdbarch);
239 /* FreeBSD/sparc64 has SVR4-style shared libraries. */
240 set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
241 set_solib_svr4_fetch_link_map_offsets
242 (gdbarch, svr4_lp64_fetch_link_map_offsets);
246 _initialize_sparc64fbsd_tdep (void)
248 gdbarch_register_osabi (bfd_arch_sparc, bfd_mach_sparc_v9,
249 GDB_OSABI_FREEBSD, sparc64fbsd_init_abi);