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Diffstat (limited to 'gdb/config/h8300/tm-h8300.h')
| -rw-r--r-- | gdb/config/h8300/tm-h8300.h | 303 |
1 files changed, 303 insertions, 0 deletions
diff --git a/gdb/config/h8300/tm-h8300.h b/gdb/config/h8300/tm-h8300.h new file mode 100644 index 00000000000..b398d2f0f9c --- /dev/null +++ b/gdb/config/h8300/tm-h8300.h @@ -0,0 +1,303 @@ +/* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + +/* Contributed by Steve Chamberlain sac@cygnus.com */ + +#ifdef __STDC__ +struct frame_info; +struct frame_saved_regs; +struct value; +struct type; +#endif + +/* 1 if debugging H8/300H application */ +extern int h8300hmode; +extern int h8300smode; + +/* 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) \ + h8300_init_extra_frame_info (fromleaf, fi) + +extern void h8300_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(lhs,rhs) ((lhs) < (rhs)) + +/*#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 + +/* 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"} + +/* An array of names of registers. */ + +extern char **h8300_register_names; +#define REGISTER_NAME(i) h8300_register_names[i] + +/* 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 ARG0_REGNUM 0 /* first reg in which an arg may be passed */ +#define ARGLAST_REGNUM 2 /* last reg in which an arg may be passed */ +#define FP_REGNUM 6 /* Contain saddress 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. */ + +extern void h8300_extract_return_value PARAMS((struct type *, char *, char *)); +#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \ + h8300_extract_return_value (TYPE, (char *)(REGBUF), (char *)(VALBUF)) + +/* 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. */ + +extern void h8300_store_return_value PARAMS((struct type *, char *)); +#define STORE_RETURN_VALUE(TYPE,VALBUF) \ + h8300_store_return_value(TYPE, (char *) (VALBUF)) + +/* struct passing and returning stuff */ +#define STORE_STRUCT_RETURN(STRUCT_ADDR, SP) \ + write_register (0, STRUCT_ADDR) + +#define USE_STRUCT_CONVENTION(gcc_p, type) (1) + +/* 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) \ + extract_address (REGBUF + REGISTER_BYTE (0), \ + REGISTER_RAW_SIZE (0)) + +/* 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) +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(fp,fi) alternate_frame_chain_valid (fp, fi) + +/* 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) h8300_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) \ + h8300_frame_find_saved_regs(frame_info, &(frame_saved_regs)) + + +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 */ + +#define BELIEVE_PCC_PROMOTION 1 + +/* + * CALL_DUMMY stuff: + */ + +#define USE_GENERIC_DUMMY_FRAMES +#define CALL_DUMMY {0} +#define CALL_DUMMY_LENGTH (0) +#define CALL_DUMMY_ADDRESS() entry_point_address () +#define CALL_DUMMY_LOCATION AT_ENTRY_POINT +#define CALL_DUMMY_START_OFFSET (0) +#define CALL_DUMMY_BREAKPOINT_OFFSET (0) + +extern CORE_ADDR h8300_push_arguments PARAMS ((int nargs, + struct value **args, + CORE_ADDR sp, + unsigned char struct_return, + CORE_ADDR struct_addr)); +extern CORE_ADDR h8300_push_return_address PARAMS ((CORE_ADDR, CORE_ADDR)); + +#define PC_IN_CALL_DUMMY(PC, SP, FP) generic_pc_in_call_dummy (PC, SP) +#define FIX_CALL_DUMMY(DUMMY, START_SP, FUNADDR, NARGS, ARGS, TYPE, GCCP) +#define PUSH_ARGUMENTS(NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR) \ + (SP) = h8300_push_arguments (NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR) +/* Push an empty stack frame, to record the current PC, etc. */ +#define PUSH_DUMMY_FRAME generic_push_dummy_frame () +/* Discard from the stack the innermost frame, restoring all registers. */ +#define POP_FRAME h8300_pop_frame () +#define PUSH_RETURN_ADDRESS(PC, SP) h8300_push_return_address (PC, SP) + +/* override the standard get_saved_register function with + one that takes account of generic CALL_DUMMY frames */ +#define GET_SAVED_REGISTER + + |