1 /* Target-dependent code for FreeBSD/sparc64.
3 Copyright (C) 2003, 2004, 2005, 2007, 2008 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 "gdb_assert.h"
31 #include "gdb_string.h"
33 #include "sparc64-tdep.h"
34 #include "solib-svr4.h"
36 /* From <machine/reg.h>. */
37 const struct sparc_gregset sparc64fbsd_gregset =
39 26 * 8, /* "tstate" */
52 sparc64fbsd_supply_gregset (const struct regset *regset,
53 struct regcache *regcache,
54 int regnum, const void *gregs, size_t len)
56 sparc64_supply_gregset (&sparc64fbsd_gregset, regcache, regnum, gregs);
60 sparc64fbsd_collect_gregset (const struct regset *regset,
61 const struct regcache *regcache,
62 int regnum, void *gregs, size_t len)
64 sparc64_collect_gregset (&sparc64fbsd_gregset, regcache, regnum, gregs);
68 sparc64fbsd_supply_fpregset (const struct regset *regset,
69 struct regcache *regcache,
70 int regnum, const void *fpregs, size_t len)
72 sparc64_supply_fpregset (regcache, regnum, fpregs);
76 sparc64fbsd_collect_fpregset (const struct regset *regset,
77 const struct regcache *regcache,
78 int regnum, void *fpregs, size_t len)
80 sparc64_collect_fpregset (regcache, regnum, fpregs);
84 /* Signal trampolines. */
87 sparc64fbsd_pc_in_sigtramp (CORE_ADDR pc, char *name)
89 return (name && strcmp (name, "__sigtramp") == 0);
92 static struct sparc_frame_cache *
93 sparc64fbsd_sigtramp_frame_cache (struct frame_info *this_frame,
96 struct sparc_frame_cache *cache;
97 CORE_ADDR addr, mcontext_addr, sp;
104 cache = sparc_frame_cache (this_frame, this_cache);
105 gdb_assert (cache == *this_cache);
107 cache->saved_regs = trad_frame_alloc_saved_regs (this_frame);
109 /* The third argument is a pointer to an instance of `ucontext_t',
110 which has a member `uc_mcontext' that contains the saved
112 addr = get_frame_register_unsigned (this_frame, SPARC_O2_REGNUM);
113 mcontext_addr = addr + 64;
115 /* The following registers travel in the `mc_local' slots of
117 addr = mcontext_addr + 16 * 8;
118 cache->saved_regs[SPARC64_FPRS_REGNUM].addr = addr + 0 * 8;
119 cache->saved_regs[SPARC64_FSR_REGNUM].addr = addr + 1 * 8;
121 /* The following registers travel in the `mc_in' slots of
123 addr = mcontext_addr + 24 * 8;
124 cache->saved_regs[SPARC64_NPC_REGNUM].addr = addr + 0 * 8;
125 cache->saved_regs[SPARC64_PC_REGNUM].addr = addr + 1 * 8;
126 cache->saved_regs[SPARC64_STATE_REGNUM].addr = addr + 2 * 8;
127 cache->saved_regs[SPARC64_Y_REGNUM].addr = addr + 4 * 8;
129 /* The `global' and `out' registers travel in the `mc_global' and
130 `mc_out' slots of `mcontext_t', except for %g0. Since %g0 is
131 always zero, keep the identity encoding. */
132 for (regnum = SPARC_G1_REGNUM, addr = mcontext_addr + 8;
133 regnum <= SPARC_O7_REGNUM; regnum++, addr += 8)
134 cache->saved_regs[regnum].addr = addr;
136 /* The `local' and `in' registers have been saved in the register
138 addr = cache->saved_regs[SPARC_SP_REGNUM].addr;
139 sp = get_frame_memory_unsigned (this_frame, addr, 8);
140 for (regnum = SPARC_L0_REGNUM, addr = sp + BIAS;
141 regnum <= SPARC_I7_REGNUM; regnum++, addr += 8)
142 cache->saved_regs[regnum].addr = addr;
144 /* The floating-point registers are only saved if the FEF bit in
145 %fprs has been set. */
147 #define FPRS_FEF (1 << 2)
149 addr = cache->saved_regs[SPARC64_FPRS_REGNUM].addr;
150 fprs = get_frame_memory_unsigned (this_frame, addr, 8);
153 for (regnum = SPARC_F0_REGNUM, addr = mcontext_addr + 32 * 8;
154 regnum <= SPARC_F31_REGNUM; regnum++, addr += 4)
155 cache->saved_regs[regnum].addr = addr;
157 for (regnum = SPARC64_F32_REGNUM;
158 regnum <= SPARC64_F62_REGNUM; regnum++, addr += 8)
159 cache->saved_regs[regnum].addr = addr;
166 sparc64fbsd_sigtramp_frame_this_id (struct frame_info *this_frame,
168 struct frame_id *this_id)
170 struct sparc_frame_cache *cache =
171 sparc64fbsd_sigtramp_frame_cache (this_frame, this_cache);
173 (*this_id) = frame_id_build (cache->base, cache->pc);
176 static struct value *
177 sparc64fbsd_sigtramp_frame_prev_register (struct frame_info *this_frame,
178 void **this_cache, int regnum)
180 struct sparc_frame_cache *cache =
181 sparc64fbsd_sigtramp_frame_cache (this_frame, this_cache);
183 return trad_frame_get_prev_register (this_frame, cache->saved_regs, regnum);
187 sparc64fbsd_sigtramp_frame_sniffer (const struct frame_unwind *self,
188 struct frame_info *this_frame,
191 CORE_ADDR pc = get_frame_pc (this_frame);
194 find_pc_partial_function (pc, &name, NULL, NULL);
195 if (sparc64fbsd_pc_in_sigtramp (pc, name))
201 static const struct frame_unwind sparc64fbsd_sigtramp_frame_unwind =
204 sparc64fbsd_sigtramp_frame_this_id,
205 sparc64fbsd_sigtramp_frame_prev_register,
207 sparc64fbsd_sigtramp_frame_sniffer
212 sparc64fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
214 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
216 tdep->gregset = regset_alloc (gdbarch, sparc64fbsd_supply_gregset,
217 sparc64fbsd_collect_gregset);
218 tdep->sizeof_gregset = 256;
220 tdep->fpregset = regset_alloc (gdbarch, sparc64fbsd_supply_fpregset,
221 sparc64fbsd_collect_fpregset);
222 tdep->sizeof_fpregset = 272;
224 frame_unwind_append_unwinder (gdbarch, &sparc64fbsd_sigtramp_frame_unwind);
226 sparc64_init_abi (info, gdbarch);
228 /* FreeBSD/sparc64 has SVR4-style shared libraries. */
229 set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
230 set_solib_svr4_fetch_link_map_offsets
231 (gdbarch, svr4_lp64_fetch_link_map_offsets);
234 /* Provide a prototype to silence -Wmissing-prototypes. */
235 void _initialize_sparc64fbsd_tdep (void);
238 _initialize_sparc64fbsd_tdep (void)
240 gdbarch_register_osabi (bfd_arch_sparc, bfd_mach_sparc_v9,
241 GDB_OSABI_FREEBSD_ELF, sparc64fbsd_init_abi);