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binutils-gdb/gdb/tm-h8500.h
Stu Grossman ccf1e898d7 * findvar.c (read_register, write_register): Make these capable 
of reading/writing registers that are shorter than REGISTER_TYPE.
	* (value_from_register):  Install H8500 specific code to return
	proper value when register is being used as a pointer.
	* h8500-tdep.c:  Remove extra defines of NUM_REGS.
	(h8500_skip_prologue):  Use correct lengths for LINK instructions.
	(FRAME_CHAIN):  Change name to h8500_frame_chain.  Rewrite code to
	chain frames properly by combining frame pointer with T reg.
	(init_extra_frame_info):  Delete.  It's now a macro.
	(frame_args_address):  Don't add PTR_SIZE.  Stack args are already
	offset by the correct amount off of the frame pointer.
	(register_byte):  Delete.  It's now a macro.
	(register_raw_size, register_virtual_size):  Delete.  Replaced by
	common routine h8500_register_size, cuz there's no difference
	between the raw & virtual sizes on this machine.
	(register_convert_to_raw, register_convert_to_virtual):  Delete,
	cuz there's no difference between the raw & virtual forms.
	Replaced by memcpy in tm file.
	(register_virtual_type):  Rename to h8500_register_virtual_type.
	Get rid of pointer pseudo-regs, use _REGNUM with all reg names.
	(_initialize_h8500_tdep):  Get rid of crock to ensure that GDB &
	emulator have same reg offsets.  This is all handled in the
	simulator code now.
	(h8500_trapped_internalvar):  New routine to detect references to
	convenience vars acting as pointer pseudo-regs.
	(h8500_value_trapped_internalvar):  Conjure up value of pointer
	pseudo-regs.
	(h8500_set_trapped_internalvar):  Convert set value in real
	register references.
	infcmd.c (read_pc, write_pc):  Add h8500 specific code to handle
	code segment register.
	infrun.c (proceed):  Simplify.  Call write_pc instead of doing it
	by hand.
	(wait_for_inferior):  Add h8500 specific code to add stack segment
	when reading SP register.
	remote-sim.c (fetch_register):  Spacing.
	tm-h8500.h:  #define GDB_TARGET_IS_H8500 to make it easier to
	detect cruft.  Redo all register manipulation stuff.  Get rid of
	pointer pseudo-regs.  (INIT_EXTRA_FRAME_INFO):  Adds stack segment
	to frame pointer.  (IS_TRAPPED_INTERNALVAL,
	VALUE_OF_TRAPPED_INTERNALVAR, SET_TRAPPED_INTERNALVAR):  Use these
	to create internal vars for pointer pseudo-regs.
1993-03-25 22:34:26 +00:00

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/* Parameters for execution on a H8/500 series machine.
Copyright (C) 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 */
#define GDB_TARGET_IS_H8500
#define IEEE_FLOAT 1
/* 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_PTR_BIT
#define TARGET_PTR_BIT (minimum_mode ? 16 : 32)
/* 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) = h8500_skip_prologue(ip);}
extern CORE_ADDR h8500_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) saved_pc_after_call(frame)
/* Stack grows downward. */
#define INNER_THAN <
/* Illegal instruction - used by the simulator for breakpoint
detection */
#define BREAKPOINT {0x0b}
/* 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. */
#define ABOUT_TO_RETURN(pc) about_to_return(pc)
/* 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 unsigned long
/* Say how much memory is needed to store a copy of the register set */
#define REGISTER_BYTES (24)
/* Index within `registers' of the first byte of the space for
register N. */
int regoff[];
#define REGISTER_BYTE(N) (regoff[N])
/* Number of bytes of storage in the actual machine representation
for register N. */
#define REGISTER_RAW_SIZE(N) h8500_register_size(N)
int h8500_register_size PARAMS ((int regno));
#define REGISTER_VIRTUAL_SIZE(N) h8500_register_size(N)
/* 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
/* 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) \
{ memcpy ((TO), (FROM), 4); }
/* Convert data from virtual format for register REGNUM
to raw format for register REGNUM. */
#define REGISTER_CONVERT_TO_RAW(REGNUM,FROM,TO) \
{ memcpy ((TO), (FROM), 4); }
/* Return the GDB type object for the "standard" data type
of data in register N. */
#define REGISTER_VIRTUAL_TYPE(N) h8500_register_virtual_type(N)
struct type *h8500_register_virtual_type PARAMS ((int regno));
/* 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", "r7", \
"ccr","pc", \
"cp","dp","ep","tp" }
/* 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 R0_REGNUM 0
#define R1_REGNUM 1
#define R2_REGNUM 2
#define R3_REGNUM 3
#define R4_REGNUM 4
#define R5_REGNUM 5
#define R6_REGNUM 6
#define R7_REGNUM 7
#define SP_REGNUM R7_REGNUM /* Contains address of top of stack */
#define FP_REGNUM R6_REGNUM /* Contains address of executing stack frame */
#define CCR_REGNUM 8 /* Contains processor status */
#define PC_REGNUM 9 /* Contains program counter */
#define SEG_C_REGNUM 10 /* Segment registers */
#define SEG_D_REGNUM 11
#define SEG_E_REGNUM 12
#define SEG_T_REGNUM 13
#define NUM_REGS 14
#define PTR_SIZE (minimum_mode ? 2: 4)
#define PTR_MASK (minimum_mode ? 0x0000ffff : 0x00ffffff)
/* 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. */
#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
bcopy ((char *)(REGBUF), 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))
/* 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
*/
CORE_ADDR h8500_frame_chain PARAMS ((FRAME thisframe));
#define INIT_EXTRA_FRAME_INFO(fromleaf, fci) \
(fci)->frame |= read_register(SEG_T_REGNUM) << 16;
#define FRAME_CHAIN(FRAME) h8500_frame_chain(FRAME)
#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 (); }
#define SHORT_INT_MAX 32767
#define SHORT_INT_MIN -32768
#define BEFORE_MAIN_LOOP_HOOK \
hms_before_main_loop();
#define NAMES_HAVE_UNDERSCORE
typedef unsigned short INSN_WORD;
#define ADDR_BITS_REMOVE(addr) ((addr) & 0xffffff)
#define ADDR_BITS_SET(addr) (((addr)))
#define read_memory_short(x) (read_memory_integer(x,2) & 0xffff)
#define DONT_USE_REMOTE
#define PRINT_REGISTER_HOOK(regno) print_register_hook(regno)
int minimum_mode;
#define CALL_DUMMY_LENGTH 10
/* Fake variables to make it easy to use 24 bit register pointers */
int h8500_is_trapped_internalvar PARAMS ((char *name));
#define IS_TRAPPED_INTERNALVAR h8500_is_trapped_internalvar
PTR h8500_value_of_trapped_internalvar PARAMS ((struct internalvar *var));
#define VALUE_OF_TRAPPED_INTERNALVAR h8500_value_of_trapped_internalvar
void h8500_set_trapped_internalvar PARAMS ((struct internalvar *var, value newval, int bitpos, int bitsize, int offset));
#define SET_TRAPPED_INTERNALVAR h8500_set_trapped_internalvar
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