Commit | Line | Data |
---|---|---|
4b17b389 MK |
1 | /* Target-dependent code for FreeBSD/alpha. |
2 | ||
9b254dd1 DJ |
3 | Copyright (C) 2001, 2002, 2003, 2006, 2007, 2008 |
4 | Free Software Foundation, Inc. | |
efd59e3f MK |
5 | |
6 | This file is part of GDB. | |
7 | ||
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 | |
a9762ec7 | 10 | the Free Software Foundation; either version 3 of the License, or |
efd59e3f MK |
11 | (at your option) any later version. |
12 | ||
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. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
efd59e3f MK |
20 | |
21 | #include "defs.h" | |
22 | #include "value.h" | |
4be87837 | 23 | #include "osabi.h" |
efd59e3f | 24 | |
82a4efa1 | 25 | #include "alpha-tdep.h" |
4b17b389 | 26 | #include "solib-svr4.h" |
82a4efa1 JT |
27 | |
28 | static int | |
9823e921 | 29 | alphafbsd_return_in_memory (struct type *type) |
efd59e3f MK |
30 | { |
31 | enum type_code code; | |
32 | int i; | |
33 | ||
34 | /* All aggregate types that won't fit in a register must be returned | |
35 | in memory. */ | |
138e7be5 | 36 | if (TYPE_LENGTH (type) > ALPHA_REGISTER_SIZE) |
efd59e3f MK |
37 | return 1; |
38 | ||
39 | /* The only aggregate types that can be returned in a register are | |
40 | structs and unions. Arrays must be returned in memory. */ | |
41 | code = TYPE_CODE (type); | |
42 | if (code != TYPE_CODE_STRUCT && code != TYPE_CODE_UNION) | |
43 | return 1; | |
44 | ||
45 | /* We need to check if this struct/union is "integer" like. For | |
46 | this to be true, the offset of each adressable subfield must be | |
47 | zero. Note that bit fields are not addressable. */ | |
48 | for (i = 0; i < TYPE_NFIELDS (type); i++) | |
49 | { | |
50 | /* If the field bitsize is non-zero, it isn't adressable. */ | |
51 | if (TYPE_FIELD_BITPOS (type, i) != 0 | |
52 | && TYPE_FIELD_BITSIZE (type, i) == 0) | |
53 | return 1; | |
54 | } | |
55 | ||
56 | return 0; | |
57 | } | |
138e7be5 MK |
58 | \f |
59 | ||
60 | /* Support for signal handlers. */ | |
61 | ||
62 | /* Return whether PC is in a BSD sigtramp routine. */ | |
63 | ||
64 | CORE_ADDR alphafbsd_sigtramp_start = 0x11ffff68; | |
65 | CORE_ADDR alphafbsd_sigtramp_end = 0x11ffffe0; | |
82a4efa1 | 66 | |
6c72f9f9 JT |
67 | static int |
68 | alphafbsd_pc_in_sigtramp (CORE_ADDR pc, char *func_name) | |
69 | { | |
138e7be5 | 70 | return (pc >= alphafbsd_sigtramp_start && pc < alphafbsd_sigtramp_end); |
6c72f9f9 JT |
71 | } |
72 | ||
138e7be5 MK |
73 | static LONGEST |
74 | alphafbsd_sigtramp_offset (CORE_ADDR pc) | |
75 | { | |
76 | return pc - alphafbsd_sigtramp_start; | |
77 | } | |
78 | ||
94afd7a6 UW |
79 | /* Assuming THIS_FRAME is the frame of a BSD sigtramp routine, |
80 | return the address of the associated sigcontext structure. */ | |
138e7be5 MK |
81 | |
82 | static CORE_ADDR | |
94afd7a6 | 83 | alphafbsd_sigcontext_addr (struct frame_info *this_frame) |
138e7be5 | 84 | { |
94afd7a6 | 85 | return get_frame_register_unsigned (this_frame, ALPHA_SP_REGNUM) + 24; |
138e7be5 MK |
86 | } |
87 | ||
88 | /* FreeBSD 5.0-RELEASE or later. */ | |
89 | ||
82a4efa1 JT |
90 | static void |
91 | alphafbsd_init_abi (struct gdbarch_info info, | |
92 | struct gdbarch *gdbarch) | |
93 | { | |
94 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
95 | ||
baa490c4 RH |
96 | /* Hook into the DWARF CFI frame unwinder. */ |
97 | alpha_dwarf2_init_abi (info, gdbarch); | |
98 | ||
99 | /* Hook into the MDEBUG frame unwinder. */ | |
100 | alpha_mdebug_init_abi (info, gdbarch); | |
101 | ||
4b17b389 MK |
102 | /* FreeBSD/alpha has SVR4-style shared libraries. */ |
103 | set_solib_svr4_fetch_link_map_offsets | |
104 | (gdbarch, svr4_lp64_fetch_link_map_offsets); | |
105 | ||
138e7be5 MK |
106 | tdep->dynamic_sigtramp_offset = alphafbsd_sigtramp_offset; |
107 | tdep->sigcontext_addr = alphafbsd_sigcontext_addr; | |
f2524b93 | 108 | tdep->pc_in_sigtramp = alphafbsd_pc_in_sigtramp; |
9823e921 | 109 | tdep->return_in_memory = alphafbsd_return_in_memory; |
138e7be5 MK |
110 | tdep->sc_pc_offset = 288; |
111 | tdep->sc_regs_offset = 24; | |
112 | tdep->sc_fpregs_offset = 320; | |
accc6d1f JT |
113 | |
114 | tdep->jb_pc = 2; | |
115 | tdep->jb_elt_size = 8; | |
82a4efa1 | 116 | } |
138e7be5 MK |
117 | \f |
118 | ||
119 | /* Provide a prototype to silence -Wmissing-prototypes. */ | |
120 | void _initialize_alphafbsd_tdep (void); | |
82a4efa1 JT |
121 | |
122 | void | |
123 | _initialize_alphafbsd_tdep (void) | |
124 | { | |
05816f70 | 125 | gdbarch_register_osabi (bfd_arch_alpha, 0, GDB_OSABI_FREEBSD_ELF, |
70f80edf | 126 | alphafbsd_init_abi); |
82a4efa1 | 127 | } |