| 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 | /* |
| 37 | * Following macro translates i386 opcode register numbers to Symmetry |
| 38 | * register numbers. This is used by FRAME_FIND_SAVED_REGS. |
| 39 | * |
| 40 | * %eax %ecx %edx %ebx %esp %ebp %esi %edi |
| 41 | * i386 0 1 2 3 4 5 6 7 |
| 42 | * Symmetry 0 2 1 5 14 15 6 7 |
| 43 | * |
| 44 | */ |
| 45 | #define I386_REGNO_TO_SYMMETRY(n) \ |
| 46 | ((n)==0?0 :(n)==1?2 :(n)==2?1 :(n)==3?5 :(n)==4?14 :(n)==5?15 :(n)) |
| 47 | |
| 48 | void |
| 49 | symmetry_extract_return_value(type, regbuf, valbuf) |
| 50 | struct type *type; |
| 51 | char *regbuf; |
| 52 | char *valbuf; |
| 53 | { |
| 54 | union { |
| 55 | double d; |
| 56 | int l[2]; |
| 57 | } xd; |
| 58 | struct minimal_symbol *msymbol; |
| 59 | float f; |
| 60 | |
| 61 | if (TYPE_CODE_FLT == TYPE_CODE(type)) { |
| 62 | msymbol = lookup_minimal_symbol ("1167_flt", (struct objfile *) NULL); |
| 63 | if (msymbol != NULL) { |
| 64 | /* found "1167_flt" means 1167, %fp2-%fp3 */ |
| 65 | /* float & double; 19= %fp2, 20= %fp3 */ |
| 66 | /* no single precision on 1167 */ |
| 67 | xd.l[1] = *((int *)®buf[REGISTER_BYTE(19)]); |
| 68 | xd.l[0] = *((int *)®buf[REGISTER_BYTE(20)]); |
| 69 | switch (TYPE_LENGTH(type)) { |
| 70 | case 4: |
| 71 | /* FIXME: broken for cross-debugging. */ |
| 72 | f = (float) xd.d; |
| 73 | memcpy (valbuf, &f, TYPE_LENGTH(type)); |
| 74 | break; |
| 75 | case 8: |
| 76 | /* FIXME: broken for cross-debugging. */ |
| 77 | memcpy (valbuf, &xd.d, TYPE_LENGTH(type)); |
| 78 | break; |
| 79 | default: |
| 80 | error("Unknown floating point size"); |
| 81 | break; |
| 82 | } |
| 83 | } else { |
| 84 | /* 387 %st(0), gcc uses this */ |
| 85 | i387_to_double(((int *)®buf[REGISTER_BYTE(3)]), |
| 86 | &xd.d); |
| 87 | switch (TYPE_LENGTH(type)) { |
| 88 | case 4: /* float */ |
| 89 | f = (float) xd.d; |
| 90 | /* FIXME: broken for cross-debugging. */ |
| 91 | memcpy (valbuf, &f, 4); |
| 92 | break; |
| 93 | case 8: /* double */ |
| 94 | /* FIXME: broken for cross-debugging. */ |
| 95 | memcpy (valbuf, &xd.d, 8); |
| 96 | break; |
| 97 | default: |
| 98 | error("Unknown floating point size"); |
| 99 | break; |
| 100 | } |
| 101 | } |
| 102 | } else { |
| 103 | memcpy (valbuf, regbuf, TYPE_LENGTH (type)); |
| 104 | } |
| 105 | } |