1 /* Definitions to target GDB to Linux on m680x0
2 Copyright (C) 1996,1998 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, Boston, MA 02111-1307, USA. */
20 /* Number of traps that happen between exec'ing the shell to run an
21 inferior, and when we finally get to the inferior code. This is 2
22 on most implementations. */
24 #define START_INFERIOR_TRAPS_EXPECTED 2
26 /* The following definitions are appropriate when using the ELF
27 format, where floating point values are returned in fp0, pointer
28 values in a0 and other values in d0. */
30 /* Extract from an array REGBUF containing the (raw) register state a
31 function return value of type TYPE, and copy that, in virtual
32 format, into VALBUF. */
34 #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
36 if (TYPE_CODE (TYPE) == TYPE_CODE_FLT) \
38 REGISTER_CONVERT_TO_VIRTUAL (FP0_REGNUM, TYPE, \
40 + REGISTER_BYTE (FP0_REGNUM)), \
43 else if (TYPE_CODE (TYPE) == TYPE_CODE_PTR) \
44 memcpy (VALBUF, (char *) (REGBUF) + REGISTER_BYTE (A0_REGNUM), \
45 TYPE_LENGTH (TYPE)); \
49 + (TYPE_LENGTH (TYPE) >= 4 ? 0 : 4 - TYPE_LENGTH (TYPE))), \
50 TYPE_LENGTH (TYPE)); \
53 /* Write into appropriate registers a function return value of type
54 TYPE, given in virtual format. */
56 #define STORE_RETURN_VALUE(TYPE,VALBUF) \
58 if (TYPE_CODE (TYPE) == TYPE_CODE_FLT) \
60 char raw_buffer[REGISTER_RAW_SIZE (FP0_REGNUM)]; \
61 REGISTER_CONVERT_TO_RAW (TYPE, FP0_REGNUM, VALBUF, raw_buffer); \
62 write_register_bytes (REGISTER_BYTE (FP0_REGNUM), \
63 raw_buffer, TYPE_LENGTH (TYPE)); \
67 if (TYPE_CODE (TYPE) == TYPE_CODE_PTR) \
68 write_register_bytes (REGISTER_BYTE (A0_REGNUM), VALBUF, \
69 TYPE_LENGTH (TYPE)); \
70 write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE)); \
75 #include "m68k/tm-m68k.h"
77 /* Extract from an array REGBUF containing the (raw) register state
78 the address in which a function should return its structure value,
79 as a CORE_ADDR (or an expression that can be used as one). */
81 #undef EXTRACT_STRUCT_VALUE_ADDRESS
82 #define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) \
83 (*(CORE_ADDR *)((char *) (REGBUF) + REGISTER_BYTE (A0_REGNUM)))
85 /* Offsets (in target ints) into jmp_buf. */
87 #define JB_ELEMENT_SIZE 4
90 /* Figure out where the longjmp will land. Slurp the args out of the stack.
91 We expect the first arg to be a pointer to the jmp_buf structure from which
92 we extract the pc (JB_PC) that we will land at. The pc is copied into ADDR.
93 This routine returns true on success */
95 #define GET_LONGJMP_TARGET(ADDR) get_longjmp_target(ADDR)
97 /* Offset to saved PC in sigcontext, from <asm/sigcontext.h>. */
98 #define SIGCONTEXT_PC_OFFSET 26
100 #undef FRAME_SAVED_PC
101 #define FRAME_SAVED_PC(FRAME) \
102 (((FRAME)->signal_handler_caller \
103 ? sigtramp_saved_pc (FRAME) \
104 : read_memory_integer ((FRAME)->frame + 4, 4)))
106 extern CORE_ADDR sigtramp_saved_pc
PARAMS ((struct frame_info
*));
108 #define IN_SIGTRAMP(pc,name) in_sigtramp (pc)
109 extern int in_sigtramp
PARAMS ((CORE_ADDR pc
));