1 /* Target-dependent code for FreeBSD/sparc64.
3 Copyright 2003, 2004 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 2 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, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
24 #include "frame-unwind.h"
29 #include "trad-frame.h"
31 #include "gdb_assert.h"
32 #include "gdb_string.h"
34 #include "sparc64-tdep.h"
36 /* From <machine/reg.h>. */
37 const struct sparc_gregset sparc64fbsd_gregset
=
39 26 * 8, /* "tstate" */
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;
56 fetch_core_registers (char *core_reg_sect
, unsigned core_reg_size
, int which
,
61 case 0: /* Integer registers */
62 if (core_reg_size
!= sparc64fbsd_sizeof_struct_reg
)
63 warning ("Wrong size register set in core file.");
65 sparc64_supply_gregset (&sparc64fbsd_gregset
, current_regcache
,
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.");
73 sparc64_supply_fpregset (current_regcache
, -1, core_reg_sect
);
77 /* Don't know what kind of register request this is; just ignore it. */
82 static struct core_fns sparc64fbsd_core_fns
=
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 */
92 /* Signal trampolines. */
95 sparc64fbsd_pc_in_sigtramp (CORE_ADDR pc
, char *name
)
97 return (name
&& strcmp (name
, "__sigtramp") == 0);
100 static struct sparc_frame_cache
*
101 sparc64fbsd_sigtramp_frame_cache (struct frame_info
*next_frame
,
104 struct sparc_frame_cache
*cache
;
105 CORE_ADDR addr
, mcontext_addr
, sp
;
112 cache
= sparc_frame_cache (next_frame
, this_cache
);
113 gdb_assert (cache
== *this_cache
);
115 cache
->saved_regs
= trad_frame_alloc_saved_regs (next_frame
);
117 /* The third argument is a pointer to an instance of `ucontext_t',
118 which has a member `uc_mcontext' that contains the saved
120 addr
= frame_unwind_register_unsigned (next_frame
, SPARC_O2_REGNUM
);
121 mcontext_addr
= addr
+ 64;
123 /* The following registers travel in the `mc_local' slots of
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;
129 /* The following registers travel in the `mc_in' slots of
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;
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
;
144 /* The `local' and `in' registers have been saved in the register
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
;
152 /* The floating-point registers are only saved if the FEF bit in
153 %fprs has been set. */
155 #define FPRS_FEF (1 << 2)
157 addr
= cache
->saved_regs
[SPARC64_FPRS_REGNUM
].addr
;
158 fprs
= get_frame_memory_unsigned (next_frame
, addr
, 8);
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
;
165 for (regnum
= SPARC64_F32_REGNUM
;
166 regnum
<= SPARC64_F62_REGNUM
; regnum
++, addr
+= 8)
167 cache
->saved_regs
[regnum
].addr
= addr
;
174 sparc64fbsd_sigtramp_frame_this_id (struct frame_info
*next_frame
,
176 struct frame_id
*this_id
)
178 struct sparc_frame_cache
*cache
=
179 sparc64fbsd_sigtramp_frame_cache (next_frame
, this_cache
);
181 (*this_id
) = frame_id_build (cache
->base
, cache
->pc
);
185 sparc64fbsd_sigtramp_frame_prev_register (struct frame_info
*next_frame
,
187 int regnum
, int *optimizedp
,
188 enum lval_type
*lvalp
,
190 int *realnump
, void *valuep
)
192 struct sparc_frame_cache
*cache
=
193 sparc64fbsd_sigtramp_frame_cache (next_frame
, this_cache
);
195 trad_frame_prev_register (next_frame
, cache
->saved_regs
, regnum
,
196 optimizedp
, lvalp
, addrp
, realnump
, valuep
);
199 static const struct frame_unwind sparc64fbsd_sigtramp_frame_unwind
=
202 sparc64fbsd_sigtramp_frame_this_id
,
203 sparc64fbsd_sigtramp_frame_prev_register
206 static const struct frame_unwind
*
207 sparc64fbsd_sigtramp_frame_sniffer (struct frame_info
*next_frame
)
209 CORE_ADDR pc
= frame_pc_unwind (next_frame
);
212 find_pc_partial_function (pc
, &name
, NULL
, NULL
);
213 if (sparc64fbsd_pc_in_sigtramp (pc
, name
))
214 return &sparc64fbsd_sigtramp_frame_unwind
;
221 sparc64fbsd_init_abi (struct gdbarch_info info
, struct gdbarch
*gdbarch
)
223 set_gdbarch_pc_in_sigtramp (gdbarch
, sparc64fbsd_pc_in_sigtramp
);
224 frame_unwind_append_sniffer (gdbarch
, sparc64fbsd_sigtramp_frame_sniffer
);
226 sparc64_init_abi (info
, gdbarch
);
229 /* Provide a prototype to silence -Wmissing-prototypes. */
230 void _initialize_sparc64fbsd_tdep (void);
233 _initialize_sparc64fbsd_tdep (void)
235 gdbarch_register_osabi (bfd_arch_sparc
, bfd_mach_sparc_v9
,
236 GDB_OSABI_FREEBSD_ELF
, sparc64fbsd_init_abi
);
238 add_core_fns (&sparc64fbsd_core_fns
);