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Diffstat (limited to 'gdb/config/h8300/tm-h8300.h')
| -rw-r--r-- | gdb/config/h8300/tm-h8300.h | 305 |
1 files changed, 305 insertions, 0 deletions
diff --git a/gdb/config/h8300/tm-h8300.h b/gdb/config/h8300/tm-h8300.h new file mode 100644 index 0000000..a583ecc --- /dev/null +++ b/gdb/config/h8300/tm-h8300.h @@ -0,0 +1,305 @@ +/* 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 */ + + +#define UNSIGNED_SHORT(X) ((X) & 0xffff) + + +#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_PTR_BIT +#define TARGET_PTR_BIT 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) \ +UNSIGNED_SHORT(read_memory_integer (read_register (SP_REGNUM), 2)) + +/* Stack grows downward. */ + +#define INNER_THAN < + + +#define BREAKPOINT {0x53, 0x00} + + +/* 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_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 unsigned short + +/*# define NUM_REGS 20 /* 20 for fake HW support */ +# define NUM_REGS 11 +# define REGISTER_BYTES (NUM_REGS*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) 1 + +/* Convert data from raw format for register REGNUM + to virtual format for register REGNUM. */ + +/*#define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,FROM,TO) */ + +/* Convert data from virtual format for register REGNUM + to raw format for register REGNUM. */ + +/*#define REGISTER_CONVERT_TO_RAW(REGNUM,FROM,TO) */ + +/* Return the GDB type object for the "standard" data type + of data in register N. */ + +#define REGISTER_VIRTUAL_TYPE(N) builtin_type_unsigned_short + + +/* Initializer for an array of names of registers. + Entries beyond the first NUM_REGS are ignored. */ + +#if NUM_REGS==20 +#define REGISTER_NAMES \ + {"r0", "r1", "r2", "r3", "r4", "r5", "r6", "sp",\ + "ccr","pc","cycles","hcheck","tier","tcsr","frc",\ + "ocra","ocrb","tcr","tocr","icra"} +#else +#define REGISTER_NAMES \ + {"r0", "r1", "r2", "r3", "r4", "r5", "r6", "sp", "ccr","pc","cycles"} +#endif + +/* 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. */ + +#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)) + +/* 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 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 (); } + +#define SHORT_INT_MAX 32767 +#define SHORT_INT_MIN -32768 + + +#define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,FROM,TO) \ +{ memcpy((TO), (FROM), 2); } +#define REGISTER_CONVERT_TO_RAW(REGNUM,FROM,TO) \ +{ memcpy((TO), (FROM), 2); } + +#define BEFORE_MAIN_LOOP_HOOK \ + hms_before_main_loop(); + +typedef unsigned short INSN_WORD; + +#define ADDR_BITS_REMOVE(addr) ((addr) & 0xffff) +#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) + |