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