| 1 | /* Sequent Symmetry target interface, for GDB. |
| 2 | Copyright (C) 1986, 1987, 1989, 1991, 1994 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 19 | |
| 20 | /* many 387-specific items of use taken from i386-dep.c */ |
| 21 | |
| 22 | #include "defs.h" |
| 23 | #include "frame.h" |
| 24 | #include "inferior.h" |
| 25 | #include "symtab.h" |
| 26 | |
| 27 | #include <signal.h> |
| 28 | #include <sys/param.h> |
| 29 | #include <sys/user.h> |
| 30 | #include <sys/dir.h> |
| 31 | #include <sys/ioctl.h> |
| 32 | #include <sys/stat.h> |
| 33 | #include "gdbcore.h" |
| 34 | #include <fcntl.h> |
| 35 | |
| 36 | void |
| 37 | symmetry_extract_return_value(type, regbuf, valbuf) |
| 38 | struct type *type; |
| 39 | char *regbuf; |
| 40 | char *valbuf; |
| 41 | { |
| 42 | union { |
| 43 | double d; |
| 44 | int l[2]; |
| 45 | } xd; |
| 46 | struct minimal_symbol *msymbol; |
| 47 | float f; |
| 48 | |
| 49 | if (TYPE_CODE_FLT == TYPE_CODE(type)) { |
| 50 | msymbol = lookup_minimal_symbol ("1167_flt", (struct objfile *) NULL); |
| 51 | if (msymbol != NULL) { |
| 52 | /* found "1167_flt" means 1167, %fp2-%fp3 */ |
| 53 | /* float & double; 19= %fp2, 20= %fp3 */ |
| 54 | /* no single precision on 1167 */ |
| 55 | xd.l[1] = *((int *)®buf[REGISTER_BYTE(19)]); |
| 56 | xd.l[0] = *((int *)®buf[REGISTER_BYTE(20)]); |
| 57 | switch (TYPE_LENGTH(type)) { |
| 58 | case 4: |
| 59 | /* FIXME: broken for cross-debugging. */ |
| 60 | f = (float) xd.d; |
| 61 | memcpy (valbuf, &f, TYPE_LENGTH(type)); |
| 62 | break; |
| 63 | case 8: |
| 64 | /* FIXME: broken for cross-debugging. */ |
| 65 | memcpy (valbuf, &xd.d, TYPE_LENGTH(type)); |
| 66 | break; |
| 67 | default: |
| 68 | error("Unknown floating point size"); |
| 69 | break; |
| 70 | } |
| 71 | } else { |
| 72 | /* 387 %st(0), gcc uses this */ |
| 73 | i387_to_double(((int *)®buf[REGISTER_BYTE(3)]), |
| 74 | &xd.d); |
| 75 | switch (TYPE_LENGTH(type)) { |
| 76 | case 4: /* float */ |
| 77 | f = (float) xd.d; |
| 78 | /* FIXME: broken for cross-debugging. */ |
| 79 | memcpy (valbuf, &f, 4); |
| 80 | break; |
| 81 | case 8: /* double */ |
| 82 | /* FIXME: broken for cross-debugging. */ |
| 83 | memcpy (valbuf, &xd.d, 8); |
| 84 | break; |
| 85 | default: |
| 86 | error("Unknown floating point size"); |
| 87 | break; |
| 88 | } |
| 89 | } |
| 90 | } else { |
| 91 | memcpy (valbuf, regbuf, TYPE_LENGTH (type)); |
| 92 | } |
| 93 | } |