mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-11-30 21:44:19 +08:00
ccf1e898d7
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.
303 lines
8.8 KiB
C
303 lines
8.8 KiB
C
/* 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
|