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[/] [or1k/] [trunk/] [gdb-5.0/] [gdb/] [config/] [ns32k/] [tm-merlin.h] - Blame information for rev 1765

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1 106 markom
/* Definitions to target GDB to a merlin under utek 2.1
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   Copyright 1986, 1987, 1989, 1991, 1993 Free Software Foundation, Inc.
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   This file is part of GDB.
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   This program is free software; you can redistribute it and/or modify
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   it under the terms of the GNU General Public License as published by
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   the Free Software Foundation; either version 2 of the License, or
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   (at your option) any later version.
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   This program is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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   GNU General Public License for more details.
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   You should have received a copy of the GNU General Public License
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   along with this program; if not, write to the Free Software
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   Foundation, Inc., 59 Temple Place - Suite 330,
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   Boston, MA 02111-1307, USA.  */
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#define TARGET_BYTE_ORDER LITTLE_ENDIAN
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/* Offset from address of function to start of its code.
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   Zero on most machines.  */
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#define FUNCTION_START_OFFSET 0
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/* Advance PC across any function entry prologue instructions
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   to reach some "real" code.  */
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extern CORE_ADDR merlin_skip_prologue PARAMS ((CORE_ADDR));
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#define SKIP_PROLOGUE(pc) (merlin_skip_prologue (pc))
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/* Immediately after a function call, return the saved pc.
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   Can't always go through the frames for this because on some machines
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   the new frame is not set up until the new function executes
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   some instructions.  */
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#define SAVED_PC_AFTER_CALL(frame) \
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        read_memory_integer (read_register (SP_REGNUM), 4)
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/* Address of end of stack space.  */
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#define STACK_END_ADDR (0x800000)
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/* Stack grows downward.  */
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#define INNER_THAN(lhs,rhs) ((lhs) < (rhs))
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/* Sequence of bytes for breakpoint instruction.  */
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#define BREAKPOINT {0xf2}
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/* Amount PC must be decremented by after a breakpoint.
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   This is often the number of bytes in BREAKPOINT
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   but not always.  */
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#define DECR_PC_AFTER_BREAK 0
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/* Define this to say that the "svc" insn is followed by
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   codes in memory saying which kind of system call it is.  */
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#define NS32K_SVC_IMMED_OPERANDS
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/* Say how long (ordinary) registers are.  This is a piece of bogosity
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   used in push_word and a few other places; REGISTER_RAW_SIZE is the
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   real way to know how big a register is.  */
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#define REGISTER_SIZE 4
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/* Number of machine registers */
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#define NUM_REGS                25
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#define NUM_GENERAL_REGS        8
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/* Initializer for an array of names of registers.
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   There should be NUM_REGS strings in this initializer.  */
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#define REGISTER_NAMES {"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \
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                        "pc", "sp", "fp", "ps",                         \
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                        "fsr",                                          \
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                        "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", \
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                        "l0", "l1", "l2", "l3", "l4",                   \
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                        }
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/* Register numbers of various important registers.
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   Note that some of these values are "real" register numbers,
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   and correspond to the general registers of the machine,
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   and some are "phony" register numbers which are too large
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   to be actual register numbers as far as the user is concerned
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   but do serve to get the desired values when passed to read_register.  */
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#define AP_REGNUM FP_REGNUM
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#define FP_REGNUM 10            /* Contains address of executing stack frame */
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#define SP_REGNUM 9             /* Contains address of top of stack */
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#define PC_REGNUM 8             /* Contains program counter */
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#define PS_REGNUM 11            /* Contains processor status */
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#define FPS_REGNUM 12           /* Floating point status register */
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#define FP0_REGNUM 13           /* Floating point register 0 */
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#define LP0_REGNUM 21           /* Double register 0 (same as FP0) */
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/* Total amount of space needed to store our copies of the machine's
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   register state, the array `registers'.  */
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#define REGISTER_BYTES ((NUM_REGS - 4) * sizeof (int) + 4 * sizeof (double))
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/* Index within `registers' of the first byte of the space for
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   register N.  */
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#define REGISTER_BYTE(N) ((N) >= LP0_REGNUM ? \
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        LP0_REGNUM * 4 + ((N) - LP0_REGNUM) * 8 : (N) * 4)
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/* Number of bytes of storage in the actual machine representation
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   for register N.  On the 32000, all regs are 4 bytes
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   except for the doubled floating registers. */
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#define REGISTER_RAW_SIZE(N) ((N) >= LP0_REGNUM ? 8 : 4)
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/* Number of bytes of storage in the program's representation
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   for register N.  On the 32000, all regs are 4 bytes
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   except for the doubled floating registers. */
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#define REGISTER_VIRTUAL_SIZE(N) ((N) >= LP0_REGNUM ? 8 : 4)
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/* Largest value REGISTER_RAW_SIZE can have.  */
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#define MAX_REGISTER_RAW_SIZE 8
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/* Largest value REGISTER_VIRTUAL_SIZE can have.  */
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#define MAX_REGISTER_VIRTUAL_SIZE 8
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/* Return the GDB type object for the "standard" data type
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   of data in register N.  */
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#define REGISTER_VIRTUAL_TYPE(N) \
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  ((N) >= FP0_REGNUM ?          \
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    ((N) >= LP0_REGNUM ?        \
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     builtin_type_double        \
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     : builtin_type_float)      \
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   : builtin_type_int)
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/* Store the address of the place in which to copy the structure the
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   subroutine will return.  This is called from call_function.
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   On this machine this is a no-op, as gcc doesn't run on it yet.
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   This calling convention is not used. */
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#define STORE_STRUCT_RETURN(ADDR, SP)
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/* Extract from an array REGBUF containing the (raw) register state
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   a function return value of type TYPE, and copy that, in virtual format,
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   into VALBUF.  */
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#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
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  memcpy (VALBUF, REGBUF, TYPE_LENGTH (TYPE))
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/* Write into appropriate registers a function return value
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   of type TYPE, given in virtual format.  */
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161
#define STORE_RETURN_VALUE(TYPE,VALBUF) \
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  write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE))
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/* Extract from an array REGBUF containing the (raw) register state
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   the address in which a function should return its structure value,
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   as a CORE_ADDR (or an expression that can be used as one).  */
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#define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) (*(int *)(REGBUF))
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/* Describe the pointer in each stack frame to the previous stack frame
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   (its caller).  */
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/* FRAME_CHAIN takes a frame's nominal address
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   and produces the frame's chain-pointer. */
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/* In the case of the Merlin, the frame's nominal address is the FP value,
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   and at that address is saved previous FP value as a 4-byte word.  */
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#define FRAME_CHAIN(thisframe)  \
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  (!inside_entry_file ((thisframe)->pc) ? \
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   read_memory_integer ((thisframe)->frame, 4) :\
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   0)
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/* Define other aspects of the stack frame.  */
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#define FRAME_SAVED_PC(FRAME) (read_memory_integer ((FRAME)->frame + 4, 4))
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/* compute base of arguments */
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#define FRAME_ARGS_ADDRESS(fi) ((fi)->frame)
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#define FRAME_LOCALS_ADDRESS(fi) ((fi)->frame)
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/* Return number of args passed to a frame.
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   Can return -1, meaning no way to tell.  */
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extern int merlin_frame_num_args PARAMS ((struct frame_info * fi));
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#define FRAME_NUM_ARGS(fi) (merlin_frame_num_args ((fi)))
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/* Return number of bytes at start of arglist that are not really args.  */
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#define FRAME_ARGS_SKIP 8
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/* Put here the code to store, into a struct frame_saved_regs,
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   the addresses of the saved registers of frame described by FRAME_INFO.
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   This includes special registers such as pc and fp saved in special
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   ways in the stack frame.  sp is even more special:
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   the address we return for it IS the sp for the next frame.  */
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#define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \
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{ int regmask,regnum;                                           \
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  int localcount;                                               \
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  CORE_ADDR enter_addr;                                         \
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  CORE_ADDR next_addr;                                          \
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                                                                \
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  enter_addr = get_pc_function_start ((frame_info)->pc);        \
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  regmask = read_memory_integer (enter_addr+1, 1);              \
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  localcount = ns32k_localcount (enter_addr);                   \
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  next_addr = (frame_info)->frame + localcount;                 \
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  for (regnum = 0; regnum < 8; regnum++, regmask >>= 1)          \
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    (frame_saved_regs).regs[regnum]                             \
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      = (regmask & 1) ? (next_addr -= 4) : 0;                    \
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  (frame_saved_regs).regs[SP_REGNUM] = (frame_info)->frame + 4; \
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  (frame_saved_regs).regs[PC_REGNUM] = (frame_info)->frame + 4; \
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  (frame_saved_regs).regs[FP_REGNUM]                            \
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     = read_memory_integer ((frame_info)->frame, 4); }
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/* Things needed for making the inferior call functions.  */
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/* Push an empty stack frame, to record the current PC, etc.  */
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#define PUSH_DUMMY_FRAME \
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{ register CORE_ADDR sp = read_register (SP_REGNUM);    \
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  register int regnum;                                  \
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  sp = push_word (sp, read_register (PC_REGNUM));       \
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  sp = push_word (sp, read_register (FP_REGNUM));       \
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  write_register (FP_REGNUM, sp);                       \
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  for (regnum = 0; regnum < 8; regnum++)                 \
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    sp = push_word (sp, read_register (regnum));        \
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  write_register (SP_REGNUM, sp);                       \
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}
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/* Discard from the stack the innermost frame, restoring all registers.  */
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#define POP_FRAME  \
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{ register struct frame_info *frame = get_current_frame ();      \
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  register CORE_ADDR fp;                                         \
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  register int regnum;                                           \
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  struct frame_saved_regs fsr;                                   \
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  struct frame_info *fi;                                                 \
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  fp = frame->frame;                                             \
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  get_frame_saved_regs (frame, &fsr);                            \
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  for (regnum = 0; regnum < 8; regnum++)                  \
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    if (fsr.regs[regnum])                                        \
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      write_register (regnum, read_memory_integer (fsr.regs[regnum], 4)); \
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  write_register (FP_REGNUM, read_memory_integer (fp, 4));       \
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  write_register (PC_REGNUM, read_memory_integer (fp + 4, 4));   \
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  write_register (SP_REGNUM, fp + 8);                            \
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  flush_cached_frames ();                                        \
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}
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/* This sequence of words is the instructions
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   enter        0xff,0          82 ff 00
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   jsr  @0x00010203     7f ae c0 01 02 03
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   adjspd       0x69696969      7f a5 01 02 03 04
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   bpt                  f2
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   Note this is 16 bytes.  */
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#define CALL_DUMMY { 0x7f00ff82, 0x0201c0ae, 0x01a57f03, 0xf2040302 }
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#define CALL_DUMMY_START_OFFSET 3
272
#define CALL_DUMMY_LENGTH       16
273
#define CALL_DUMMY_ADDR         5
274
#define CALL_DUMMY_NARGS        11
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/* Insert the specified number of args and function address
277
   into a call sequence of the above form stored at DUMMYNAME.  */
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#define FIX_CALL_DUMMY(dummyname, pc, fun, nargs, args, type, gcc_p)            \
280
{ int flipped = fun | 0xc0000000;                               \
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  flip_bytes (&flipped, 4);                                     \
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  *((int *) (((char *) dummyname)+CALL_DUMMY_ADDR)) = flipped;  \
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  flipped = - nargs * 4;                                        \
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  flip_bytes (&flipped, 4);                                     \
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  *((int *) (((char *) dummyname)+CALL_DUMMY_NARGS)) = flipped; \
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}

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