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/* Target definitions for delta68.
Copyright 1993, 1994, 1998 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* Define BPT_VECTOR if it is different than the default.
This is the vector number used by traps to indicate a breakpoint. */
#define BPT_VECTOR 0x1
#define GCC_COMPILED_FLAG_SYMBOL "gcc_compiled%"
#define GCC2_COMPILED_FLAG_SYMBOL "gcc2_compiled%"
/* Amount PC must be decremented by after a breakpoint.
On the Delta, the kernel decrements it for us. */
#define DECR_PC_AFTER_BREAK 0
/* Not sure what happens if we try to store this register, but
phdm@info.ucl.ac.be says we need this define. */
#define CANNOT_STORE_REGISTER(regno) (regno == FPI_REGNUM)
/* Extract from an array REGBUF containing the (raw) register state
a function return value of type TYPE, and copy that, in virtual format,
into VALBUF. */
/* When it returns a float/double value, use fp0 in sysV68. */
/* When it returns a pointer value, use a0 in sysV68. */
#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
if (TYPE_CODE (TYPE) == TYPE_CODE_FLT) \
REGISTER_CONVERT_TO_VIRTUAL (FP0_REGNUM, TYPE, \
®BUF[REGISTER_BYTE (FP0_REGNUM)], \
VALBUF); \
else \
memcpy ((VALBUF), \
(char *) ((REGBUF) + \
(TYPE_CODE(TYPE) == TYPE_CODE_PTR ? 8 * 4 : \
(TYPE_LENGTH(TYPE) >= 4 ? 0 : 4 - TYPE_LENGTH(TYPE)))), \
TYPE_LENGTH(TYPE))
/* Write into appropriate registers a function return value
of type TYPE, given in virtual format. */
/* When it returns a float/double value, use fp0 in sysV68. */
/* When it returns a pointer value, use a0 in sysV68. */
#define STORE_RETURN_VALUE(TYPE,VALBUF) \
if (TYPE_CODE (TYPE) == TYPE_CODE_FLT) \
{ \
char raw_buf[REGISTER_RAW_SIZE (FP0_REGNUM)]; \
REGISTER_CONVERT_TO_RAW (TYPE, FP0_REGNUM, VALBUF, raw_buf); \
write_register_bytes (REGISTER_BYTE (FP0_REGNUM), \
raw_buf, REGISTER_RAW_SIZE (FP0_REGNUM)); \
} \
else \
write_register_bytes ((TYPE_CODE(TYPE) == TYPE_CODE_PTR ? 8 * 4 : 0), \
VALBUF, TYPE_LENGTH (TYPE))
/* Return number of args passed to a frame.
Can return -1, meaning no way to tell. */
#define FRAME_NUM_ARGS(val, fi) \
{ register CORE_ADDR pc = FRAME_SAVED_PC (fi); \
register int insn = 0177777 & read_memory_integer (pc, 2); \
val = 0; \
if (insn == 0047757 || insn == 0157374) /* lea W(sp),sp or addaw #W,sp */ \
val = read_memory_integer (pc + 2, 2); \
else if ((insn & 0170777) == 0050217 /* addql #N, sp */ \
|| (insn & 0170777) == 0050117) /* addqw */ \
{ val = (insn >> 9) & 7; if (val == 0) val = 8; } \
else if (insn == 0157774) /* addal #WW, sp */ \
val = read_memory_integer (pc + 2, 4); \
val >>= 2; }
/* On M68040 versions of sysV68 R3V7.1, ptrace(PT_WRITE_I) does not clear
the processor's instruction cache as it should. */
#define CLEAR_INSN_CACHE() clear_insn_cache()
#include "m68k/tm-m68k.h"
/* Extract from an array REGBUF containing the (raw) register state
the address in which a function should return its structure value,
as a CORE_ADDR (or an expression that can be used as one). */
#undef EXTRACT_STRUCT_VALUE_ADDRESS
#define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF)\
(*(CORE_ADDR *)((char*)(REGBUF) + 8 * 4))
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