1 /* Target-dependent code for NetBSD/sparc64.
3 Copyright 2002, 2003, 2004 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"
30 #include "solib-svr4.h"
31 #include "trad-frame.h"
33 #include "gdb_assert.h"
34 #include "gdb_string.h"
36 #include "sparc64-tdep.h"
37 #include "nbsd-tdep.h"
39 /* From <machine/reg.h>. */
40 const struct sparc_gregset sparc64nbsd_gregset
=
53 /* Size of `struct reg' and `struct fpreg'. */
54 static const int sparc64nbsd_sizeof_struct_reg
= 160;
55 static const int sparc64nbsd_sizeof_struct_fpreg
= 272;
58 fetch_core_registers (char *core_reg_sect
, unsigned core_reg_size
, int which
,
63 case 0: /* Integer registers */
64 if (core_reg_size
!= sparc64nbsd_sizeof_struct_reg
)
65 warning ("Wrong size register set in core file.");
67 sparc64_supply_gregset (&sparc64nbsd_gregset
, current_regcache
,
71 case 2: /* Floating pointer registers */
72 if (core_reg_size
!= sparc64nbsd_sizeof_struct_fpreg
)
73 warning ("Wrong size FP register set in core file.");
75 sparc64_supply_fpregset (current_regcache
, -1, core_reg_sect
);
79 /* Don't know what kind of register request this is; just ignore it. */
84 static struct core_fns sparc64nbsd_core_fns
=
86 bfd_target_elf_flavour
, /* core_flavour */
87 default_check_format
, /* check_format */
88 default_core_sniffer
, /* core_sniffer */
89 fetch_core_registers
, /* core_read_registers */
93 /* Signal trampolines. */
95 /* The following variables describe the location of an on-stack signal
96 trampoline. The current values correspond to the memory layout for
97 NetBSD 1.3 and up. These shouldn't be necessary for NetBSD 2.0 and
98 up, since NetBSD uses signal trampolines provided by libc now. */
100 static const CORE_ADDR sparc64nbsd_sigtramp_start
= 0xffffffffffffdee4ULL
;
101 static const CORE_ADDR sparc64nbsd_sigtramp_end
= 0xffffffffffffe000ULL
;
104 sparc64nbsd_pc_in_sigtramp (CORE_ADDR pc
, char *name
)
106 if (pc
>= sparc64nbsd_sigtramp_start
&& pc
< sparc64nbsd_sigtramp_end
)
109 return nbsd_pc_in_sigtramp (pc
, name
);
112 static struct sparc_frame_cache
*
113 sparc64nbsd_sigcontext_frame_cache (struct frame_info
*next_frame
,
116 struct sparc_frame_cache
*cache
;
117 CORE_ADDR addr
, sigcontext_addr
, sp
;
124 cache
= sparc_frame_cache (next_frame
, this_cache
);
125 gdb_assert (cache
== *this_cache
);
127 /* The registers are saved in bits and pieces scattered all over the
128 place. The code below records their location on the assumption
129 that the part of the signal trampoline that saves the state has
132 /* If we couldn't find the frame's function, we're probably dealing
133 with an on-stack signal trampoline. */
136 cache
->pc
= sparc64nbsd_sigtramp_start
;
138 /* Since we couldn't find the frame's function, the cache was
139 initialized under the assumption that we're frameless. */
140 cache
->frameless_p
= 0;
141 addr
= frame_unwind_register_unsigned (next_frame
, SPARC_FP_REGNUM
);
145 cache
->saved_regs
= trad_frame_alloc_saved_regs (next_frame
);
147 /* We find the appropriate instance of `struct sigcontext' at a
148 fixed offset in the signal frame. */
149 sigcontext_addr
= cache
->base
+ BIAS
+ 128 + 8;
151 cache
->saved_regs
[SPARC_SP_REGNUM
].addr
= sigcontext_addr
+ 8;
152 cache
->saved_regs
[SPARC64_PC_REGNUM
].addr
= sigcontext_addr
+ 16;
153 cache
->saved_regs
[SPARC64_NPC_REGNUM
].addr
= sigcontext_addr
+ 24;
154 cache
->saved_regs
[SPARC64_STATE_REGNUM
].addr
= sigcontext_addr
+ 32;
155 cache
->saved_regs
[SPARC_G1_REGNUM
].addr
= sigcontext_addr
+ 40;
156 cache
->saved_regs
[SPARC_O0_REGNUM
].addr
= sigcontext_addr
+ 48;
158 /* The remaining `global' registers and %y are saved in the `local'
160 delta
= SPARC_L0_REGNUM
- SPARC_G0_REGNUM
;
161 for (regnum
= SPARC_G2_REGNUM
; regnum
<= SPARC_G7_REGNUM
; regnum
++)
162 cache
->saved_regs
[regnum
].realreg
= regnum
+ delta
;
163 cache
->saved_regs
[SPARC64_Y_REGNUM
].realreg
= SPARC_L1_REGNUM
;
165 /* The remaining `out' registers can be found in the current frame's
167 delta
= SPARC_I0_REGNUM
- SPARC_O0_REGNUM
;
168 for (regnum
= SPARC_O1_REGNUM
; regnum
<= SPARC_O5_REGNUM
; regnum
++)
169 cache
->saved_regs
[regnum
].realreg
= regnum
+ delta
;
170 cache
->saved_regs
[SPARC_O7_REGNUM
].realreg
= SPARC_I7_REGNUM
;
172 /* The `local' and `in' registers have been saved in the register
174 addr
= cache
->saved_regs
[SPARC_SP_REGNUM
].addr
;
175 sp
= get_frame_memory_unsigned (next_frame
, addr
, 8);
176 for (regnum
= SPARC_L0_REGNUM
, addr
= sp
+ BIAS
;
177 regnum
<= SPARC_I7_REGNUM
; regnum
++, addr
+= 8)
178 cache
->saved_regs
[regnum
].addr
= addr
;
180 /* TODO: Handle the floating-point registers. */
186 sparc64nbsd_sigcontext_frame_this_id (struct frame_info
*next_frame
,
188 struct frame_id
*this_id
)
190 struct sparc_frame_cache
*cache
=
191 sparc64nbsd_sigcontext_frame_cache (next_frame
, this_cache
);
193 (*this_id
) = frame_id_build (cache
->base
, cache
->pc
);
197 sparc64nbsd_sigcontext_frame_prev_register (struct frame_info
*next_frame
,
199 int regnum
, int *optimizedp
,
200 enum lval_type
*lvalp
,
202 int *realnump
, void *valuep
)
204 struct sparc_frame_cache
*cache
=
205 sparc64nbsd_sigcontext_frame_cache (next_frame
, this_cache
);
207 trad_frame_prev_register (next_frame
, cache
->saved_regs
, regnum
,
208 optimizedp
, lvalp
, addrp
, realnump
, valuep
);
211 static const struct frame_unwind sparc64nbsd_sigcontext_frame_unwind
=
214 sparc64nbsd_sigcontext_frame_this_id
,
215 sparc64nbsd_sigcontext_frame_prev_register
218 static const struct frame_unwind
*
219 sparc64nbsd_sigtramp_frame_sniffer (struct frame_info
*next_frame
)
221 CORE_ADDR pc
= frame_pc_unwind (next_frame
);
224 find_pc_partial_function (pc
, &name
, NULL
, NULL
);
225 if (sparc64nbsd_pc_in_sigtramp (pc
, name
))
227 if (name
== NULL
|| strncmp (name
, "__sigtramp_sigcontext", 21))
228 return &sparc64nbsd_sigcontext_frame_unwind
;
236 sparc64nbsd_init_abi (struct gdbarch_info info
, struct gdbarch
*gdbarch
)
238 set_gdbarch_pc_in_sigtramp (gdbarch
, sparc64nbsd_pc_in_sigtramp
);
239 frame_unwind_append_sniffer (gdbarch
, sparc64nbsd_sigtramp_frame_sniffer
);
241 sparc64_init_abi (info
, gdbarch
);
243 set_solib_svr4_fetch_link_map_offsets
244 (gdbarch
, nbsd_lp64_solib_svr4_fetch_link_map_offsets
);
248 /* Provide a prototype to silence -Wmissing-prototypes. */
249 void _initialize_sparc64nbsd_tdep (void);
252 _initialize_sparc64nbsd_tdep (void)
254 gdbarch_register_osabi (bfd_arch_sparc
, bfd_mach_sparc_v9
,
255 GDB_OSABI_NETBSD_ELF
, sparc64nbsd_init_abi
);
257 add_core_fns (&sparc64nbsd_core_fns
);