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/* Definitions to target GDB to Linux on m680x0
Copyright (C) 1996,1998 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. */
/* Number of traps that happen between exec'ing the shell to run an
inferior, and when we finally get to the inferior code. This is 2
on most implementations. */
#define START_INFERIOR_TRAPS_EXPECTED 2
/* The following definitions are appropriate when using the ELF
format, where floating point values are returned in fp0, pointer
values in a0 and other values in d0. */
/* 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. */
#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
{ \
if (TYPE_CODE (TYPE) == TYPE_CODE_FLT) \
{ \
REGISTER_CONVERT_TO_VIRTUAL (FP0_REGNUM, TYPE, \
((char *) (REGBUF) \
+ REGISTER_BYTE (FP0_REGNUM)), \
VALBUF); \
} \
else if (TYPE_CODE (TYPE) == TYPE_CODE_PTR) \
memcpy (VALBUF, (char *) (REGBUF) + REGISTER_BYTE (A0_REGNUM), \
TYPE_LENGTH (TYPE)); \
else \
memcpy (VALBUF, \
((char *) (REGBUF) \
+ (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. */
#define STORE_RETURN_VALUE(TYPE,VALBUF) \
{ \
if (TYPE_CODE (TYPE) == TYPE_CODE_FLT) \
{ \
char raw_buffer[REGISTER_RAW_SIZE (FP0_REGNUM)]; \
REGISTER_CONVERT_TO_RAW (TYPE, FP0_REGNUM, VALBUF, raw_buffer); \
write_register_bytes (REGISTER_BYTE (FP0_REGNUM), \
raw_buffer, TYPE_LENGTH (TYPE)); \
} \
else \
{ \
if (TYPE_CODE (TYPE) == TYPE_CODE_PTR) \
write_register_bytes (REGISTER_BYTE (A0_REGNUM), VALBUF, \
TYPE_LENGTH (TYPE)); \
write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE)); \
} \
}
#include "tm-linux.h"
#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) + REGISTER_BYTE (A0_REGNUM)))
/* Offsets (in target ints) into jmp_buf. */
#define JB_ELEMENT_SIZE 4
#define JB_PC 7
/* Figure out where the longjmp will land. Slurp the args out of the stack.
We expect the first arg to be a pointer to the jmp_buf structure from which
we extract the pc (JB_PC) that we will land at. The pc is copied into ADDR.
This routine returns true on success */
#define GET_LONGJMP_TARGET(ADDR) m68k_get_longjmp_target(ADDR)
/* Offset to saved PC in sigcontext, from <asm/sigcontext.h>. */
#define SIGCONTEXT_PC_OFFSET 26
#undef FRAME_SAVED_PC
#define FRAME_SAVED_PC(FRAME) \
(((FRAME)->signal_handler_caller \
? sigtramp_saved_pc (FRAME) \
: read_memory_integer ((FRAME)->frame + 4, 4)))
extern CORE_ADDR sigtramp_saved_pc (struct frame_info *);
#define IN_SIGTRAMP(pc,name) in_sigtramp (pc)
extern int in_sigtramp (CORE_ADDR pc);
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