1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
|
/* Target-dependent code for FreeBSD/Alpha.
Copyright 2001, 2002, 2003 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include "defs.h"
#include "value.h"
#include "osabi.h"
#include "alpha-tdep.h"
static int
alphafbsd_use_struct_convention (int gcc_p, struct type *type)
{
enum type_code code;
int i;
/* All aggregate types that won't fit in a register must be returned
in memory. */
if (TYPE_LENGTH (type) > ALPHA_REGISTER_SIZE)
return 1;
/* The only aggregate types that can be returned in a register are
structs and unions. Arrays must be returned in memory. */
code = TYPE_CODE (type);
if (code != TYPE_CODE_STRUCT && code != TYPE_CODE_UNION)
return 1;
/* We need to check if this struct/union is "integer" like. For
this to be true, the offset of each adressable subfield must be
zero. Note that bit fields are not addressable. */
for (i = 0; i < TYPE_NFIELDS (type); i++)
{
/* If the field bitsize is non-zero, it isn't adressable. */
if (TYPE_FIELD_BITPOS (type, i) != 0
&& TYPE_FIELD_BITSIZE (type, i) == 0)
return 1;
}
return 0;
}
/* Support for signal handlers. */
/* Return whether PC is in a BSD sigtramp routine. */
CORE_ADDR alphafbsd_sigtramp_start = 0x11ffff68;
CORE_ADDR alphafbsd_sigtramp_end = 0x11ffffe0;
static int
alphafbsd_pc_in_sigtramp (CORE_ADDR pc, char *func_name)
{
return (pc >= alphafbsd_sigtramp_start && pc < alphafbsd_sigtramp_end);
}
static LONGEST
alphafbsd_sigtramp_offset (CORE_ADDR pc)
{
return pc - alphafbsd_sigtramp_start;
}
/* Assuming NEXT_FRAME is for a frame following a BSD sigtramp
routine, return the address of the associated sigcontext structure. */
static CORE_ADDR
alphafbsd_sigcontext_addr (struct frame_info *next_frame)
{
return frame_unwind_register_unsigned (next_frame, ALPHA_SP_REGNUM) + 24;
}
/* FreeBSD 5.0-RELEASE or later. */
static void
alphafbsd_init_abi (struct gdbarch_info info,
struct gdbarch *gdbarch)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
/* Hook into the DWARF CFI frame unwinder. */
alpha_dwarf2_init_abi (info, gdbarch);
/* Hook into the MDEBUG frame unwinder. */
alpha_mdebug_init_abi (info, gdbarch);
set_gdbarch_deprecated_use_struct_convention (gdbarch, alphafbsd_use_struct_convention);
tdep->dynamic_sigtramp_offset = alphafbsd_sigtramp_offset;
tdep->sigcontext_addr = alphafbsd_sigcontext_addr;
tdep->pc_in_sigtramp = alphafbsd_pc_in_sigtramp;
tdep->sc_pc_offset = 288;
tdep->sc_regs_offset = 24;
tdep->sc_fpregs_offset = 320;
tdep->jb_pc = 2;
tdep->jb_elt_size = 8;
}
/* Provide a prototype to silence -Wmissing-prototypes. */
void _initialize_alphafbsd_tdep (void);
void
_initialize_alphafbsd_tdep (void)
{
gdbarch_register_osabi (bfd_arch_alpha, 0, GDB_OSABI_FREEBSD_ELF,
alphafbsd_init_abi);
}
|
