| 1 | /* Target-dependent code for FreeBSD/Alpha. |
| 2 | Copyright 2001, 2002 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GDB. |
| 5 | |
| 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. |
| 10 | |
| 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. |
| 15 | |
| 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. */ |
| 20 | |
| 21 | #include "defs.h" |
| 22 | #include "value.h" |
| 23 | |
| 24 | #include "alpha-tdep.h" |
| 25 | |
| 26 | static int |
| 27 | alphafbsd_use_struct_convention (int gcc_p, struct type *type) |
| 28 | { |
| 29 | enum type_code code; |
| 30 | int i; |
| 31 | |
| 32 | /* All aggregate types that won't fit in a register must be returned |
| 33 | in memory. */ |
| 34 | if (TYPE_LENGTH (type) > REGISTER_SIZE) |
| 35 | return 1; |
| 36 | |
| 37 | /* The only aggregate types that can be returned in a register are |
| 38 | structs and unions. Arrays must be returned in memory. */ |
| 39 | code = TYPE_CODE (type); |
| 40 | if (code != TYPE_CODE_STRUCT && code != TYPE_CODE_UNION) |
| 41 | return 1; |
| 42 | |
| 43 | /* We need to check if this struct/union is "integer" like. For |
| 44 | this to be true, the offset of each adressable subfield must be |
| 45 | zero. Note that bit fields are not addressable. */ |
| 46 | for (i = 0; i < TYPE_NFIELDS (type); i++) |
| 47 | { |
| 48 | /* If the field bitsize is non-zero, it isn't adressable. */ |
| 49 | if (TYPE_FIELD_BITPOS (type, i) != 0 |
| 50 | && TYPE_FIELD_BITSIZE (type, i) == 0) |
| 51 | return 1; |
| 52 | } |
| 53 | |
| 54 | return 0; |
| 55 | } |
| 56 | |
| 57 | static int |
| 58 | alphafbsd_pc_in_sigtramp (CORE_ADDR pc, char *func_name) |
| 59 | { |
| 60 | /* FIXME */ |
| 61 | return 0; |
| 62 | } |
| 63 | |
| 64 | static void |
| 65 | alphafbsd_init_abi (struct gdbarch_info info, |
| 66 | struct gdbarch *gdbarch) |
| 67 | { |
| 68 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 69 | |
| 70 | set_gdbarch_pc_in_sigtramp (gdbarch, alphafbsd_pc_in_sigtramp); |
| 71 | |
| 72 | set_gdbarch_use_struct_convention (gdbarch, alphafbsd_use_struct_convention); |
| 73 | |
| 74 | tdep->jb_pc = 2; |
| 75 | tdep->jb_elt_size = 8; |
| 76 | } |
| 77 | |
| 78 | void |
| 79 | _initialize_alphafbsd_tdep (void) |
| 80 | { |
| 81 | gdbarch_register_osabi (bfd_arch_alpha, 0, GDB_OSABI_FREEBSD_ELF, |
| 82 | alphafbsd_init_abi); |
| 83 | } |