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Diffstat (limited to 'gdb/config/z8k/tm-z8k.h')
| -rw-r--r-- | gdb/config/z8k/tm-z8k.h | 287 |
1 files changed, 287 insertions, 0 deletions
diff --git a/gdb/config/z8k/tm-z8k.h b/gdb/config/z8k/tm-z8k.h new file mode 100644 index 00000000000..babde906c98 --- /dev/null +++ b/gdb/config/z8k/tm-z8k.h @@ -0,0 +1,287 @@ +/* Parameters for execution on a z8000 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. */ + +#define IEEE_FLOAT 1 + +#undef TARGET_INT_BIT +#undef TARGET_LONG_BIT +#undef TARGET_SHORT_BIT +#undef TARGET_PTR_BIT + +#define TARGET_SHORT_BIT 16 +#define TARGET_INT_BIT 16 +#define TARGET_LONG_BIT 32 +#define TARGET_PTR_BIT (BIG ? 32: 16) + +/* Define the bit, byte, and word ordering of the machine. */ +#define TARGET_BYTE_ORDER BIG_ENDIAN + +/* 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) = z8k_skip_prologue(ip);} +extern CORE_ADDR mz8k_skip_prologue PARAMS ((CORE_ADDR ip)); + + +/* 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(lhs,rhs) ((lhs) < (rhs)) + +/* Sequence of bytes for breakpoint instruction. */ + +#define BREAKPOINT {0x36,0x00} + +/* 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 + +/* Say how long registers are. */ + +#define REGISTER_TYPE unsigned int + +#define NUM_REGS 23 /* 16 registers + 1 ccr + 1 pc + 3 debug + regs + fake fp + fake sp*/ +#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 z8k, all but the pc are 2 bytes, but we + keep them all as 4 bytes and trim them on I/O */ + + +#define REGISTER_RAW_SIZE(N) (((N) < 16)? 2:4) + +/* Number of bytes of storage in the program's representation + for register N. */ + +#define REGISTER_VIRTUAL_SIZE(N) REGISTER_RAW_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 + +/* Return the GDB type object for the "standard" data type + of data in register N. */ + +#define REGISTER_VIRTUAL_TYPE(N) \ + (REGISTER_VIRTUAL_SIZE(N) == 2? builtin_type_unsigned_int : builtin_type_long) + +/*#define INIT_FRAME_PC(x,y) init_frame_pc(x,y)*/ +/* 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", \ + "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", \ + "ccr", "pc", "cycles","insts","time","fp","sp"} + +/* 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 CCR_REGNUM 16 /* Contains processor status */ +#define PC_REGNUM 17 /* Contains program counter */ +#define CYCLES_REGNUM 18 +#define INSTS_REGNUM 19 +#define TIME_REGNUM 20 +#define FP_REGNUM 21 /* Contains fp, whatever memory model */ +#define SP_REGNUM 22 /* Conatins sp, whatever memory model */ + + + +#define PTR_SIZE (BIG ? 4: 2) +#define PTR_MASK (BIG ? 0xff00ffff : 0x0000ffff) + +/* 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) 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) \ + memcpy(VALBUF, REGBUF + REGISTER_BYTE(2), TYPE_LENGTH(TYPE)); + +/* Write into appropriate registers a function return value + of type TYPE, given in virtual format. */ + +#define STORE_RETURN_VALUE(TYPE,VALBUF) abort(); + +/* 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. + In the case of the Z8000, the frame's nominal address + is the address of a ptr sized byte word containing the calling + frame's address. */ + +#define FRAME_CHAIN(thisframe) frame_chain(thisframe); + + + +/* 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) frame_saved_pc(FRAME) + +#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. */ +#if !defined (FRAME_NUM_ARGS) +#define FRAME_NUM_ARGS(val,fi) (val = -1) +#endif + +/* Return number of bytes at start of arglist that are not really args. */ + +#define FRAME_ARGS_SKIP 8 + +#ifdef __STDC__ +struct frame_info; +#endif +extern void z8k_frame_init_saved_regs PARAMS ((struct frame_info *)); +#define FRAME_INIT_SAVED_REGS(fi) z8k_frame_init_saved_regs (fi) + + +/* Things needed for making the inferior call functions. + It seems like every m68k based machine has almost identical definitions + in the individual machine's configuration files. Most other cpu types + (mips, i386, etc) have routines in their *-tdep.c files to handle this + for most configurations. The m68k family should be able to do this as + well. These macros can still be overridden when necessary. */ + +/* The CALL_DUMMY macro is the sequence of instructions, as disassembled + by gdb itself: + + fmovemx fp0-fp7,sp@- 0xf227 0xe0ff + moveml d0-a5,sp@- 0x48e7 0xfffc + clrw sp@- 0x4267 + movew ccr,sp@- 0x42e7 + + /..* The arguments are pushed at this point by GDB; + no code is needed in the dummy for this. + The CALL_DUMMY_START_OFFSET gives the position of + the following jsr instruction. *../ + + jsr @#0x32323232 0x4eb9 0x3232 0x3232 + addal #0x69696969,sp 0xdffc 0x6969 0x6969 + trap #<your BPT_VECTOR number here> 0x4e4? + nop 0x4e71 + + Note this is CALL_DUMMY_LENGTH bytes (28 for the above example). + We actually start executing at the jsr, since the pushing of the + registers is done by PUSH_DUMMY_FRAME. If this were real code, + the arguments for the function called by the jsr would be pushed + between the moveml and the jsr, and we could allow it to execute through. + But the arguments have to be pushed by GDB after the PUSH_DUMMY_FRAME is + done, and we cannot allow the moveml to push the registers again lest + they be taken for the arguments. */ + + +#define CALL_DUMMY { 0 } +#define CALL_DUMMY_LENGTH 24 /* Size of CALL_DUMMY */ +#define CALL_DUMMY_START_OFFSET 8 /* Offset to jsr instruction*/ + + +/* Insert the specified number of args and function address + into a call sequence of the above form stored at DUMMYNAME. + We use the BFD routines to store a big-endian value of known size. */ + +#define FIX_CALL_DUMMY(dummyname, pc, fun, nargs, args, type, gcc_p) \ +{ bfd_putb32 (fun, (char *) dummyname + CALL_DUMMY_START_OFFSET + 2); \ + bfd_putb32 (nargs*4, (char *) dummyname + CALL_DUMMY_START_OFFSET + 8); } + +/* Push an empty stack frame, to record the current PC, etc. */ + +#define PUSH_DUMMY_FRAME { z8k_push_dummy_frame (); } + +extern void z8k_push_dummy_frame PARAMS ((void)); + +extern void z8k_pop_frame PARAMS ((void)); + +/* Discard from the stack the innermost frame, restoring all registers. */ + +#define POP_FRAME { z8k_pop_frame (); } + +/* Offset from SP to first arg on stack at first instruction of a function */ + +#define SP_ARG0 (1 * 4) + +extern CORE_ADDR z8k_addr_bits_remove PARAMS ((CORE_ADDR)); +#define ADDR_BITS_REMOVE(addr) z8k_addr_bits_remove (addr) +int sim_z8001_mode; +#define BIG (sim_z8001_mode) + +#define read_memory_short(x) (read_memory_integer(x,2) & 0xffff) + +#define NO_STD_REGS + +#define PRINT_REGISTER_HOOK(regno) print_register_hook(regno) + + +#define INIT_EXTRA_SYMTAB_INFO \ + z8k_set_pointer_size(objfile->obfd->arch_info->bits_per_address); + +#define REGISTER_SIZE 4 + |