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"
30 #include "trad-frame.h"
32 #include "gdb_assert.h"
33 #include "gdb_string.h"
35 #include "sparc64-tdep.h"
37 /* From <machine/reg.h>. */
38 const struct sparc_gregset sparc64fbsd_gregset
=
40 26 * 8, /* "tstate" */
53 sparc64fbsd_supply_gregset (const struct regset
*regset
,
54 struct regcache
*regcache
,
55 int regnum
, const void *gregs
, size_t len
)
57 sparc64_supply_gregset (&sparc64fbsd_gregset
, regcache
, regnum
, gregs
);
61 sparc64fbsd_supply_fpregset (const struct regset
*regset
,
62 struct regcache
*regcache
,
63 int regnum
, const void *fpregs
, size_t len
)
65 sparc64_supply_fpregset (regcache
, regnum
, fpregs
);
69 /* Signal trampolines. */
72 sparc64fbsd_pc_in_sigtramp (CORE_ADDR pc
, char *name
)
74 return (name
&& strcmp (name
, "__sigtramp") == 0);
77 static struct sparc_frame_cache
*
78 sparc64fbsd_sigtramp_frame_cache (struct frame_info
*next_frame
,
81 struct sparc_frame_cache
*cache
;
82 CORE_ADDR addr
, mcontext_addr
, sp
;
89 cache
= sparc_frame_cache (next_frame
, this_cache
);
90 gdb_assert (cache
== *this_cache
);
92 cache
->saved_regs
= trad_frame_alloc_saved_regs (next_frame
);
94 /* The third argument is a pointer to an instance of `ucontext_t',
95 which has a member `uc_mcontext' that contains the saved
97 addr
= frame_unwind_register_unsigned (next_frame
, SPARC_O2_REGNUM
);
98 mcontext_addr
= addr
+ 64;
100 /* The following registers travel in the `mc_local' slots of
102 addr
= mcontext_addr
+ 16 * 8;
103 cache
->saved_regs
[SPARC64_FPRS_REGNUM
].addr
= addr
+ 0 * 8;
104 cache
->saved_regs
[SPARC64_FSR_REGNUM
].addr
= addr
+ 1 * 8;
106 /* The following registers travel in the `mc_in' slots of
108 addr
= mcontext_addr
+ 24 * 8;
109 cache
->saved_regs
[SPARC64_NPC_REGNUM
].addr
= addr
+ 0 * 8;
110 cache
->saved_regs
[SPARC64_PC_REGNUM
].addr
= addr
+ 1 * 8;
111 cache
->saved_regs
[SPARC64_STATE_REGNUM
].addr
= addr
+ 2 * 8;
112 cache
->saved_regs
[SPARC64_Y_REGNUM
].addr
= addr
+ 4 * 8;
114 /* The `global' and `out' registers travel in the `mc_global' and
115 `mc_out' slots of `mcontext_t', except for %g0. Since %g0 is
116 always zero, keep the identity encoding. */
117 for (regnum
= SPARC_G1_REGNUM
, addr
= mcontext_addr
+ 8;
118 regnum
<= SPARC_O7_REGNUM
; regnum
++, addr
+= 8)
119 cache
->saved_regs
[regnum
].addr
= addr
;
121 /* The `local' and `in' registers have been saved in the register
123 addr
= cache
->saved_regs
[SPARC_SP_REGNUM
].addr
;
124 sp
= get_frame_memory_unsigned (next_frame
, addr
, 8);
125 for (regnum
= SPARC_L0_REGNUM
, addr
= sp
+ BIAS
;
126 regnum
<= SPARC_I7_REGNUM
; regnum
++, addr
+= 8)
127 cache
->saved_regs
[regnum
].addr
= addr
;
129 /* The floating-point registers are only saved if the FEF bit in
130 %fprs has been set. */
132 #define FPRS_FEF (1 << 2)
134 addr
= cache
->saved_regs
[SPARC64_FPRS_REGNUM
].addr
;
135 fprs
= get_frame_memory_unsigned (next_frame
, addr
, 8);
138 for (regnum
= SPARC_F0_REGNUM
, addr
= mcontext_addr
+ 32 * 8;
139 regnum
<= SPARC_F31_REGNUM
; regnum
++, addr
+= 4)
140 cache
->saved_regs
[regnum
].addr
= addr
;
142 for (regnum
= SPARC64_F32_REGNUM
;
143 regnum
<= SPARC64_F62_REGNUM
; regnum
++, addr
+= 8)
144 cache
->saved_regs
[regnum
].addr
= addr
;
151 sparc64fbsd_sigtramp_frame_this_id (struct frame_info
*next_frame
,
153 struct frame_id
*this_id
)
155 struct sparc_frame_cache
*cache
=
156 sparc64fbsd_sigtramp_frame_cache (next_frame
, this_cache
);
158 (*this_id
) = frame_id_build (cache
->base
, cache
->pc
);
162 sparc64fbsd_sigtramp_frame_prev_register (struct frame_info
*next_frame
,
164 int regnum
, int *optimizedp
,
165 enum lval_type
*lvalp
,
167 int *realnump
, void *valuep
)
169 struct sparc_frame_cache
*cache
=
170 sparc64fbsd_sigtramp_frame_cache (next_frame
, this_cache
);
172 trad_frame_get_prev_register (next_frame
, cache
->saved_regs
, regnum
,
173 optimizedp
, lvalp
, addrp
, realnump
, valuep
);
176 static const struct frame_unwind sparc64fbsd_sigtramp_frame_unwind
=
179 sparc64fbsd_sigtramp_frame_this_id
,
180 sparc64fbsd_sigtramp_frame_prev_register
183 static const struct frame_unwind
*
184 sparc64fbsd_sigtramp_frame_sniffer (struct frame_info
*next_frame
)
186 CORE_ADDR pc
= frame_pc_unwind (next_frame
);
189 find_pc_partial_function (pc
, &name
, NULL
, NULL
);
190 if (sparc64fbsd_pc_in_sigtramp (pc
, name
))
191 return &sparc64fbsd_sigtramp_frame_unwind
;
198 sparc64fbsd_init_abi (struct gdbarch_info info
, struct gdbarch
*gdbarch
)
200 struct gdbarch_tdep
*tdep
= gdbarch_tdep (gdbarch
);
202 tdep
->gregset
= regset_alloc (gdbarch
, sparc64fbsd_supply_gregset
, NULL
);
203 tdep
->sizeof_gregset
= 256;
205 tdep
->fpregset
= regset_alloc (gdbarch
, sparc64fbsd_supply_fpregset
, NULL
);
206 tdep
->sizeof_fpregset
= 272;
208 frame_unwind_append_sniffer (gdbarch
, sparc64fbsd_sigtramp_frame_sniffer
);
210 sparc64_init_abi (info
, gdbarch
);
213 /* Provide a prototype to silence -Wmissing-prototypes. */
214 void _initialize_sparc64fbsd_tdep (void);
217 _initialize_sparc64fbsd_tdep (void)
219 gdbarch_register_osabi (bfd_arch_sparc
, bfd_mach_sparc_v9
,
220 GDB_OSABI_FREEBSD_ELF
, sparc64fbsd_init_abi
);