1 /* Target-dependent code for NetBSD/sparc64.
3 Copyright 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
4 Based on code contributed by Wasabi Systems, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
25 #include "frame-unwind.h"
32 #include "solib-svr4.h"
33 #include "trad-frame.h"
35 #include "gdb_assert.h"
36 #include "gdb_string.h"
38 #include "sparc64-tdep.h"
39 #include "nbsd-tdep.h"
41 /* From <machine/reg.h>. */
42 const struct sparc_gregset sparc64nbsd_gregset
=
57 sparc64nbsd_supply_gregset (const struct regset
*regset
,
58 struct regcache
*regcache
,
59 int regnum
, const void *gregs
, size_t len
)
61 sparc64_supply_gregset (&sparc64nbsd_gregset
, regcache
, regnum
, gregs
);
65 sparc64nbsd_supply_fpregset (const struct regset
*regset
,
66 struct regcache
*regcache
,
67 int regnum
, const void *fpregs
, size_t len
)
69 sparc64_supply_fpregset (regcache
, regnum
, fpregs
);
73 /* Signal trampolines. */
75 /* The following variables describe the location of an on-stack signal
76 trampoline. The current values correspond to the memory layout for
77 NetBSD 1.3 and up. These shouldn't be necessary for NetBSD 2.0 and
78 up, since NetBSD uses signal trampolines provided by libc now. */
80 static const CORE_ADDR sparc64nbsd_sigtramp_start
= 0xffffffffffffdee4ULL
;
81 static const CORE_ADDR sparc64nbsd_sigtramp_end
= 0xffffffffffffe000ULL
;
84 sparc64nbsd_pc_in_sigtramp (CORE_ADDR pc
, char *name
)
86 if (pc
>= sparc64nbsd_sigtramp_start
&& pc
< sparc64nbsd_sigtramp_end
)
89 return nbsd_pc_in_sigtramp (pc
, name
);
92 struct trad_frame_saved_reg
*
93 sparc64nbsd_sigcontext_saved_regs (CORE_ADDR sigcontext_addr
,
94 struct frame_info
*next_frame
)
96 struct trad_frame_saved_reg
*saved_regs
;
100 saved_regs
= trad_frame_alloc_saved_regs (next_frame
);
102 /* The registers are saved in bits and pieces scattered all over the
103 place. The code below records their location on the assumption
104 that the part of the signal trampoline that saves the state has
107 saved_regs
[SPARC_SP_REGNUM
].addr
= sigcontext_addr
+ 8;
108 saved_regs
[SPARC64_PC_REGNUM
].addr
= sigcontext_addr
+ 16;
109 saved_regs
[SPARC64_NPC_REGNUM
].addr
= sigcontext_addr
+ 24;
110 saved_regs
[SPARC64_STATE_REGNUM
].addr
= sigcontext_addr
+ 32;
111 saved_regs
[SPARC_G1_REGNUM
].addr
= sigcontext_addr
+ 40;
112 saved_regs
[SPARC_O0_REGNUM
].addr
= sigcontext_addr
+ 48;
114 /* The remaining `global' registers and %y are saved in the `local'
116 delta
= SPARC_L0_REGNUM
- SPARC_G0_REGNUM
;
117 for (regnum
= SPARC_G2_REGNUM
; regnum
<= SPARC_G7_REGNUM
; regnum
++)
118 saved_regs
[regnum
].realreg
= regnum
+ delta
;
119 saved_regs
[SPARC64_Y_REGNUM
].realreg
= SPARC_L1_REGNUM
;
121 /* The remaining `out' registers can be found in the current frame's
123 delta
= SPARC_I0_REGNUM
- SPARC_O0_REGNUM
;
124 for (regnum
= SPARC_O1_REGNUM
; regnum
<= SPARC_O5_REGNUM
; regnum
++)
125 saved_regs
[regnum
].realreg
= regnum
+ delta
;
126 saved_regs
[SPARC_O7_REGNUM
].realreg
= SPARC_I7_REGNUM
;
128 /* The `local' and `in' registers have been saved in the register
130 addr
= saved_regs
[SPARC_SP_REGNUM
].addr
;
131 sp
= get_frame_memory_unsigned (next_frame
, addr
, 8);
132 for (regnum
= SPARC_L0_REGNUM
, addr
= sp
+ BIAS
;
133 regnum
<= SPARC_I7_REGNUM
; regnum
++, addr
+= 8)
134 saved_regs
[regnum
].addr
= addr
;
136 /* TODO: Handle the floating-point registers. */
141 static struct sparc_frame_cache
*
142 sparc64nbsd_sigcontext_frame_cache (struct frame_info
*next_frame
,
145 struct sparc_frame_cache
*cache
;
151 cache
= sparc_frame_cache (next_frame
, this_cache
);
152 gdb_assert (cache
== *this_cache
);
154 /* If we couldn't find the frame's function, we're probably dealing
155 with an on-stack signal trampoline. */
158 cache
->pc
= sparc64nbsd_sigtramp_start
;
160 /* Since we couldn't find the frame's function, the cache was
161 initialized under the assumption that we're frameless. */
162 cache
->frameless_p
= 0;
163 addr
= frame_unwind_register_unsigned (next_frame
, SPARC_FP_REGNUM
);
169 /* We find the appropriate instance of `struct sigcontext' at a
170 fixed offset in the signal frame. */
171 addr
= cache
->base
+ 128 + 8;
172 cache
->saved_regs
= sparc64nbsd_sigcontext_saved_regs (addr
, next_frame
);
178 sparc64nbsd_sigcontext_frame_this_id (struct frame_info
*next_frame
,
180 struct frame_id
*this_id
)
182 struct sparc_frame_cache
*cache
=
183 sparc64nbsd_sigcontext_frame_cache (next_frame
, this_cache
);
185 (*this_id
) = frame_id_build (cache
->base
, cache
->pc
);
189 sparc64nbsd_sigcontext_frame_prev_register (struct frame_info
*next_frame
,
191 int regnum
, int *optimizedp
,
192 enum lval_type
*lvalp
,
194 int *realnump
, void *valuep
)
196 struct sparc_frame_cache
*cache
=
197 sparc64nbsd_sigcontext_frame_cache (next_frame
, this_cache
);
199 trad_frame_get_prev_register (next_frame
, cache
->saved_regs
, regnum
,
200 optimizedp
, lvalp
, addrp
, realnump
, valuep
);
203 static const struct frame_unwind sparc64nbsd_sigcontext_frame_unwind
=
206 sparc64nbsd_sigcontext_frame_this_id
,
207 sparc64nbsd_sigcontext_frame_prev_register
210 static const struct frame_unwind
*
211 sparc64nbsd_sigtramp_frame_sniffer (struct frame_info
*next_frame
)
213 CORE_ADDR pc
= frame_pc_unwind (next_frame
);
216 find_pc_partial_function (pc
, &name
, NULL
, NULL
);
217 if (sparc64nbsd_pc_in_sigtramp (pc
, name
))
219 if (name
== NULL
|| strncmp (name
, "__sigtramp_sigcontext", 21))
220 return &sparc64nbsd_sigcontext_frame_unwind
;
228 sparc64nbsd_init_abi (struct gdbarch_info info
, struct gdbarch
*gdbarch
)
230 struct gdbarch_tdep
*tdep
= gdbarch_tdep (gdbarch
);
232 tdep
->gregset
= regset_alloc (gdbarch
, sparc64nbsd_supply_gregset
, NULL
);
233 tdep
->sizeof_gregset
= 160;
235 tdep
->fpregset
= regset_alloc (gdbarch
, sparc64nbsd_supply_fpregset
, NULL
);
236 tdep
->sizeof_fpregset
= 272;
238 frame_unwind_append_sniffer (gdbarch
, sparc64nbsd_sigtramp_frame_sniffer
);
240 sparc64_init_abi (info
, gdbarch
);
242 /* NetBSD/sparc64 has SVR4-style shared libraries. */
243 set_gdbarch_skip_trampoline_code (gdbarch
, find_solib_trampoline_target
);
244 set_solib_svr4_fetch_link_map_offsets
245 (gdbarch
, svr4_lp64_fetch_link_map_offsets
);
249 /* Provide a prototype to silence -Wmissing-prototypes. */
250 void _initialize_sparc64nbsd_tdep (void);
253 _initialize_sparc64nbsd_tdep (void)
255 gdbarch_register_osabi (bfd_arch_sparc
, bfd_mach_sparc_v9
,
256 GDB_OSABI_NETBSD_ELF
, sparc64nbsd_init_abi
);