-/* Parameters for execution on a H8/300 series machine.
- Copyright (C) 1992 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 */
-
-#define IEEE_FLOAT 1
-
-/* Define the bit, byte, and word ordering of the machine. */
-#define TARGET_BYTE_ORDER BIG_ENDIAN
-
-#define TARGET_CHAR_BIT 8
-#define TARGET_SHORT_BIT 16
-#define TARGET_INT_BIT 16
-#define TARGET_LONG_BIT 32
-#define TARGET_LONG_LONG_BIT 64
-#define TARGET_FLOAT_BIT 32
-#define TARGET_DOUBLE_BIT 64
-
-
-/* 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_integer (read_register (SP_REGNUM), 2)
-
-/* Stack grows downward. */
-
-#define INNER_THAN <
-
-/* Sequence of bytes for breakpoint instruction.
- This is a TRAP instruction. The last 4 bits (0xf below) is the
- vector. Systems which don't use 0xf should define BPT_VECTOR
- themselves before including this file. */
-
-
-#define BPT_VECTOR 0xf
-
-
-
-#define BREAKPOINT {0x4e, (0x40 | BPT_VECTOR)}
-
-
-/* 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 2
-
-
-/* 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_integer (pc, 2) & ~0x3) == 0x4e74)
-
-/* Return 1 if P points to an invalid floating point value. */
-
-#define INVALID_FLOAT(p, len) 0 /* Just a first guess; not checked */
-
-/* Say how long registers are. */
-
-#define REGISTER_TYPE short
-
-# define NUM_REGS 10
-# define REGISTER_BYTES (10*2)
-
-
-/* Index within `registers' of the first byte of the space for
- register N. */
-
-#define REGISTER_BYTE(N) ((N) * 2)
-
-/* 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) 2
-
-/* Number of bytes of storage in the program's representation
- for register N. On the H8/300, all regs are 2 bytes. */
-
-#define REGISTER_VIRTUAL_SIZE(N) 2
-
-/* Largest value REGISTER_RAW_SIZE can have. */
-
-#define MAX_REGISTER_RAW_SIZE 2
-
-/* Largest value REGISTER_VIRTUAL_SIZE can have. */
-
-#define MAX_REGISTER_VIRTUAL_SIZE 2
-
-/* Nonzero if register N requires conversion
- from raw format to virtual format. */
-
-#define REGISTER_CONVERTIBLE(N) 0
-
-/* Convert data from raw format for register REGNUM
- to virtual format for register REGNUM. */
-
-#define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,FROM,TO) bcopy ((FROM), (TO), 2);
-
-/* Convert data from virtual format for register REGNUM
- to raw format for register REGNUM. */
-
-#define REGISTER_CONVERT_TO_RAW(REGNUM,FROM,TO) bcopy ((FROM), (TO), 2);
-
-/* Return the GDB type object for the "standard" data type
- of data in register N. */
-
-#define REGISTER_VIRTUAL_TYPE(N) builtin_type_int
-
-
-/* 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"}
-
-
-/* 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 */
-
-/* Store the address of the place in which to copy the structure the
- subroutine will return. This is called from call_function. */
-
-#define STORE_STRUCT_RETURN(ADDR, SP) \
- { write_register (0, (ADDR)); abort(); }
-
-/* 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. This is assuming that floating point values are returned
- as doubles in d0/d1. */
-
-
-#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
- bcopy ((char *)(REGBUF) + \
- (TYPE_LENGTH(TYPE) >= 4 ? 0 : 4 - TYPE_LENGTH(TYPE)), \
- VALBUF, 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. */
-
-
-#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). */
-
-#define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) (*(CORE_ADDR *)(REGBUF))
-\f
-/* 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. */
-
-/* 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 blockframe.c */
-
-#define FRAME_CHAIN_VALID(chain, thisframe) \
- (chain != 0 \
- && !(inside_main_scope ((thisframe)->pc)) \
- && !(inside_entry_scope ((thisframe)->pc)))
-
-
-/* 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)
-
-#define FRAME_SAVED_PC(FRAME) (read_memory_integer ((FRAME)->frame + 2, 2))
-
-#define FRAME_ARGS_ADDRESS(fi) ((fi)->frame)
-
-#define FRAME_LOCALS_ADDRESS(fi) ((fi)->frame)
-
-/* 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 4
-
-/* 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) abort();
-\f
-
-/* 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 (); }
-
projects / deliverable / binutils-gdb.git / blobdiff