258 lines
8.3 KiB
C
258 lines
8.3 KiB
C
/* Parameters for execution on a H8/300 series machine.
|
||
Copyright 1992, 1993 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
|
||
|
||
/* Contributed by Steve Chamberlain sac@cygnus.com */
|
||
|
||
|
||
/* 1 if debugging H8/300H application */
|
||
extern int h8300hmode;
|
||
|
||
/* Number of bytes in a word */
|
||
|
||
#define BINWORD (h8300hmode?4:2)
|
||
|
||
#define EXTRA_FRAME_INFO \
|
||
struct frame_saved_regs *fsr; \
|
||
CORE_ADDR from_pc; \
|
||
CORE_ADDR args_pointer;\
|
||
CORE_ADDR locals_pointer ;
|
||
|
||
/* Zero the frame_saved_regs pointer when the frame is initialized,
|
||
so that FRAME_FIND_SAVED_REGS () will know to allocate and
|
||
initialize a frame_saved_regs struct the first time it is called.
|
||
Set the arg_pointer to -1, which is not valid; 0 and other values
|
||
indicate real, cached values. */
|
||
|
||
#define INIT_EXTRA_FRAME_INFO(fromleaf, fi) \
|
||
init_extra_frame_info (fromleaf, fi)
|
||
|
||
extern void init_extra_frame_info ();
|
||
|
||
#define IEEE_FLOAT
|
||
/* Define the bit, byte, and word ordering of the machine. */
|
||
#define TARGET_BYTE_ORDER BIG_ENDIAN
|
||
#undef TARGET_INT_BIT
|
||
#define TARGET_INT_BIT 16
|
||
#undef TARGET_LONG_BIT
|
||
#define TARGET_LONG_BIT 32
|
||
#undef TARGET_PTR_BIT
|
||
#define TARGET_PTR_BIT (h8300hmode ? 32:16)
|
||
|
||
/* Offset from address of function to start of its code.
|
||
Zero on most machines. */
|
||
|
||
#define FUNCTION_START_OFFSET 0
|
||
|
||
/* Advance PC across any function entry prologue instructions
|
||
to reach some "real" code. */
|
||
|
||
#define SKIP_PROLOGUE(ip) {(ip) = h8300_skip_prologue(ip);}
|
||
extern CORE_ADDR h8300_skip_prologue ();
|
||
|
||
/* Immediately after a function call, return the saved pc.
|
||
Can't always go through the frames for this because on some machines
|
||
the new frame is not set up until the new function executes
|
||
some instructions. */
|
||
|
||
#define SAVED_PC_AFTER_CALL(frame) \
|
||
read_memory_unsigned_integer (read_register (SP_REGNUM), BINWORD)
|
||
|
||
/* Stack grows downward. */
|
||
|
||
#define INNER_THAN <
|
||
|
||
/*#define BREAKPOINT {0x7A, 0xFF}*/
|
||
#define BREAKPOINT {0x01, 0x80} /* Sleep */
|
||
#define REMOTE_BREAKPOINT { 0x57, 0x30} /* trapa #3 */
|
||
/* If your kernel resets the pc after the trap happens you may need to
|
||
define this before including this file. */
|
||
|
||
#define DECR_PC_AFTER_BREAK 0
|
||
|
||
/* Nonzero if instruction at PC is a return instruction. */
|
||
/* Allow any of the return instructions, including a trapv and a return
|
||
from interupt. */
|
||
|
||
#define ABOUT_TO_RETURN(pc) ((read_memory_unsigned_integer (pc, 2) & ~0x3) == 0x4e74)
|
||
|
||
/* Say how long registers are. */
|
||
|
||
#define REGISTER_SIZE 4
|
||
|
||
#define NUM_REGS 13
|
||
|
||
#define REGISTER_BYTES (NUM_REGS * 4)
|
||
|
||
/* Index within `registers' of the first byte of the space for
|
||
register N. */
|
||
|
||
#define REGISTER_BYTE(N) ((N) * 4)
|
||
|
||
/* Number of bytes of storage in the actual machine representation
|
||
for register N. On the H8/300, all regs are 2 bytes. */
|
||
|
||
#define REGISTER_RAW_SIZE(N) (h8300hmode ? 4 : 2)
|
||
|
||
/* Number of bytes of storage in the program's representation
|
||
for register N. */
|
||
|
||
#define REGISTER_VIRTUAL_SIZE(N) (h8300hmode ? 4 : 2)
|
||
|
||
/* Largest value REGISTER_RAW_SIZE can have. */
|
||
|
||
#define MAX_REGISTER_RAW_SIZE 4
|
||
|
||
/* Largest value REGISTER_VIRTUAL_SIZE can have. */
|
||
|
||
#define MAX_REGISTER_VIRTUAL_SIZE 4
|
||
|
||
/* Return the GDB type object for the "standard" data type
|
||
of data in register N. */
|
||
|
||
#define REGISTER_VIRTUAL_TYPE(N) \
|
||
(h8300hmode ? builtin_type_unsigned_long : builtin_type_unsigned_short)
|
||
|
||
/* Initializer for an array of names of registers.
|
||
Entries beyond the first NUM_REGS are ignored. */
|
||
|
||
#define REGISTER_NAMES \
|
||
{"r0", "r1", "r2", "r3", "r4", "r5", "r6", "sp", "ccr","pc","cycles","tick","inst"}
|
||
|
||
/* Register numbers of various important registers.
|
||
Note that some of these values are "real" register numbers,
|
||
and correspond to the general registers of the machine,
|
||
and some are "phony" register numbers which are too large
|
||
to be actual register numbers as far as the user is concerned
|
||
but do serve to get the desired values when passed to read_register. */
|
||
|
||
#define FP_REGNUM 6 /* Contains address of executing stack frame */
|
||
#define SP_REGNUM 7 /* Contains address of top of stack */
|
||
#define CCR_REGNUM 8 /* Contains processor status */
|
||
#define PC_REGNUM 9 /* Contains program counter */
|
||
|
||
/* 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. */
|
||
|
||
/* FIXME: Won't work with both h8/300's. */
|
||
|
||
#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
|
||
memcpy (VALBUF, (char *)(REGBUF), TYPE_LENGTH(TYPE))
|
||
|
||
/* Write into appropriate registers a function return value
|
||
of type TYPE, given in virtual format. Assumes floats are passed
|
||
in d0/d1. */
|
||
/* FIXME: Won't work with both h8/300's. */
|
||
|
||
#define STORE_RETURN_VALUE(TYPE,VALBUF) \
|
||
write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE))
|
||
|
||
/* 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). */
|
||
/* FIXME: Won't work with both h8/300's. */
|
||
|
||
#define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) (*(CORE_ADDR *)(REGBUF))
|
||
|
||
/* Describe the pointer in each stack frame to the previous stack frame
|
||
(its caller). */
|
||
|
||
/* FRAME_CHAIN takes a frame's nominal address
|
||
and produces the frame's chain-pointer.
|
||
|
||
However, if FRAME_CHAIN_VALID returns zero,
|
||
it means the given frame is the outermost one and has no caller. */
|
||
|
||
#define FRAME_CHAIN(FRAME) h8300_frame_chain(FRAME)
|
||
struct frame_info ;
|
||
CORE_ADDR h8300_frame_chain PARAMS ((struct frame_info *));
|
||
|
||
/* In the case of the H8/300, the frame's nominal address
|
||
is the address of a 2-byte word containing the calling frame's address. */
|
||
|
||
/* Use the alternate method of avoiding running up off the end of
|
||
the frame chain or following frames back into the startup code.
|
||
See the comments in objfile.h */
|
||
|
||
#define FRAME_CHAIN_VALID_ALTERNATE
|
||
|
||
/* Define other aspects of the stack frame. */
|
||
|
||
/* A macro that tells us whether the function invocation represented
|
||
by FI does not have a frame on the stack associated with it. If it
|
||
does not, FRAMELESS is set to 1, else 0. */
|
||
#define FRAMELESS_FUNCTION_INVOCATION(FI, FRAMELESS) \
|
||
(FRAMELESS) = frameless_look_for_prologue(FI)
|
||
|
||
/* Any function with a frame looks like this
|
||
SECOND ARG
|
||
FIRST ARG
|
||
RET PC
|
||
SAVED R2
|
||
SAVED R3
|
||
SAVED FP <-FP POINTS HERE
|
||
LOCALS0
|
||
LOCALS1 <-SP POINTS HERE
|
||
*/
|
||
|
||
#define FRAME_SAVED_PC(FRAME) frame_saved_pc(FRAME)
|
||
|
||
#define FRAME_ARGS_ADDRESS(fi) frame_args_address(fi)
|
||
|
||
#define FRAME_LOCALS_ADDRESS(fi) frame_locals_address(fi);
|
||
|
||
/* Set VAL to the number of args passed to frame described by FI.
|
||
Can set VAL to -1, meaning no way to tell. */
|
||
|
||
/* We can't tell how many args there are
|
||
now that the C compiler delays popping them. */
|
||
|
||
#define FRAME_NUM_ARGS(val,fi) (val = -1)
|
||
|
||
/* Return number of bytes at start of arglist that are not really args. */
|
||
|
||
#define FRAME_ARGS_SKIP 0
|
||
|
||
/* Put here the code to store, into a struct frame_saved_regs,
|
||
the addresses of the saved registers of frame described by FRAME_INFO.
|
||
This includes special registers such as pc and fp saved in special
|
||
ways in the stack frame. sp is even more special:
|
||
the address we return for it IS the sp for the next frame. */
|
||
|
||
#define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \
|
||
frame_find_saved_regs(frame_info, &(frame_saved_regs))
|
||
|
||
|
||
/* Push an empty stack frame, to record the current PC, etc. */
|
||
|
||
/*#define PUSH_DUMMY_FRAME { h8300_push_dummy_frame (); }*/
|
||
|
||
/* Discard from the stack the innermost frame, restoring all registers. */
|
||
|
||
#define POP_FRAME { h8300_pop_frame (); }
|
||
|
||
typedef unsigned short INSN_WORD;
|
||
|
||
|
||
#define PRINT_REGISTER_HOOK(regno) print_register_hook(regno)
|
||
|
||
#define GDB_TARGET_IS_H8300
|
||
|
||
#define NUM_REALREGS 10
|
||
#define NOP { 0x01, 0x80} /* A sleep insn */
|