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// OBSOLETE /* Target machine description for generic Motorola 88000, for GDB.

// OBSOLETE 

// OBSOLETE    Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1993, 1994, 1996,

// OBSOLETE    1998, 1999, 2000, 2002 Free Software Foundation, Inc.

// OBSOLETE 

// OBSOLETE    This file is part of GDB.

// OBSOLETE 

// OBSOLETE    This program is free software; you can redistribute it and/or modify

// OBSOLETE    it under the terms of the GNU General Public License as published by

// OBSOLETE    the Free Software Foundation; either version 2 of the License, or

// OBSOLETE    (at your option) any later version.

// OBSOLETE 

// OBSOLETE    This program is distributed in the hope that it will be useful,

// OBSOLETE    but WITHOUT ANY WARRANTY; without even the implied warranty of

// OBSOLETE    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

// OBSOLETE    GNU General Public License for more details.

// OBSOLETE 

// OBSOLETE    You should have received a copy of the GNU General Public License

// OBSOLETE    along with this program; if not, write to the Free Software

// OBSOLETE    Foundation, Inc., 59 Temple Place - Suite 330,

// OBSOLETE    Boston, MA 02111-1307, USA.  */

// OBSOLETE 

// OBSOLETE #include "doublest.h"

// OBSOLETE #include "regcache.h"

// OBSOLETE 

// OBSOLETE /* g++ support is not yet included.  */

// OBSOLETE 

// OBSOLETE /* We cache information about saved registers in the frame structure,

// OBSOLETE    to save us from having to re-scan function prologues every time

// OBSOLETE    a register in a non-current frame is accessed.  */

// OBSOLETE 

// OBSOLETE #define EXTRA_FRAME_INFO    \

// OBSOLETE     struct frame_saved_regs *fsr;   \

// OBSOLETE     CORE_ADDR locals_pointer;       \

// OBSOLETE     CORE_ADDR args_pointer;

// OBSOLETE 

// OBSOLETE /* Zero the frame_saved_regs pointer when the frame is initialized,

// OBSOLETE    so that FRAME_FIND_SAVED_REGS () will know to allocate and

// OBSOLETE    initialize a frame_saved_regs struct the first time it is called.

// OBSOLETE    Set the arg_pointer to -1, which is not valid; 0 and other values

// OBSOLETE    indicate real, cached values.  */

// OBSOLETE 

// OBSOLETE #define INIT_EXTRA_FRAME_INFO(fromleaf, fi) \

// OBSOLETE     init_extra_frame_info (fromleaf, fi)

// OBSOLETE extern void init_extra_frame_info ();

// OBSOLETE 

// OBSOLETE /* Offset from address of function to start of its code.

// OBSOLETE    Zero on most machines.  */

// OBSOLETE 

// OBSOLETE #define FUNCTION_START_OFFSET 0

// OBSOLETE 

// OBSOLETE /* Advance PC across any function entry prologue instructions

// OBSOLETE    to reach some "real" code.  */

// OBSOLETE 

// OBSOLETE extern CORE_ADDR m88k_skip_prologue (CORE_ADDR);

// OBSOLETE #define SKIP_PROLOGUE(frompc) (m88k_skip_prologue (frompc))

// OBSOLETE 

// OBSOLETE /* The m88k kernel aligns all instructions on 4-byte boundaries.  The

// OBSOLETE    kernel also uses the least significant two bits for its own hocus

// OBSOLETE    pocus.  When gdb receives an address from the kernel, it needs to

// OBSOLETE    preserve those right-most two bits, but gdb also needs to be careful

// OBSOLETE    to realize that those two bits are not really a part of the address

// OBSOLETE    of an instruction.  Shrug.  */

// OBSOLETE 

// OBSOLETE extern CORE_ADDR m88k_addr_bits_remove (CORE_ADDR);

// OBSOLETE #define ADDR_BITS_REMOVE(addr) m88k_addr_bits_remove (addr)

// OBSOLETE 

// OBSOLETE /* Immediately after a function call, return the saved pc.

// OBSOLETE    Can't always go through the frames for this because on some machines

// OBSOLETE    the new frame is not set up until the new function executes

// OBSOLETE    some instructions.  */

// OBSOLETE 

// OBSOLETE #define SAVED_PC_AFTER_CALL(frame) \

// OBSOLETE   (ADDR_BITS_REMOVE (read_register (SRP_REGNUM)))

// OBSOLETE 

// OBSOLETE /* Stack grows downward.  */

// OBSOLETE 

// OBSOLETE #define INNER_THAN(lhs,rhs) ((lhs) < (rhs))

// OBSOLETE 

// OBSOLETE /* Sequence of bytes for breakpoint instruction.  */

// OBSOLETE 

// OBSOLETE /* instruction 0xF000D1FF is 'tb0 0,r0,511'

// OBSOLETE    If Bit bit 0 of r0 is clear (always true),

// OBSOLETE    initiate exception processing (trap).

// OBSOLETE  */

// OBSOLETE #define BREAKPOINT {0xF0, 0x00, 0xD1, 0xFF}

// OBSOLETE 

// OBSOLETE /* Amount PC must be decremented by after a breakpoint.

// OBSOLETE    This is often the number of bytes in BREAKPOINT

// OBSOLETE    but not always.  */

// OBSOLETE 

// OBSOLETE #define DECR_PC_AFTER_BREAK 0

// OBSOLETE 

// OBSOLETE /* Say how long (ordinary) registers are.  This is a piece of bogosity

// OBSOLETE    used in push_word and a few other places; REGISTER_RAW_SIZE is the

// OBSOLETE    real way to know how big a register is.  */

// OBSOLETE 

// OBSOLETE #define REGISTER_SIZE 4

// OBSOLETE 

// OBSOLETE /* Number of machine registers */

// OBSOLETE 

// OBSOLETE #define GP_REGS (38)

// OBSOLETE #define FP_REGS (32)

// OBSOLETE #define NUM_REGS (GP_REGS + FP_REGS)

// OBSOLETE 

// OBSOLETE /* Initializer for an array of names of registers.

// OBSOLETE    There should be NUM_REGS strings in this initializer.  */

// OBSOLETE 

// OBSOLETE #define REGISTER_NAMES {\

// OBSOLETE                       "r0",\

// OBSOLETE                       "r1",\

// OBSOLETE                       "r2",\

// OBSOLETE                       "r3",\

// OBSOLETE                       "r4",\

// OBSOLETE                       "r5",\

// OBSOLETE                       "r6",\

// OBSOLETE                       "r7",\

// OBSOLETE                       "r8",\

// OBSOLETE                       "r9",\

// OBSOLETE                       "r10",\

// OBSOLETE                       "r11",\

// OBSOLETE                       "r12",\

// OBSOLETE                       "r13",\

// OBSOLETE                       "r14",\

// OBSOLETE                       "r15",\

// OBSOLETE                       "r16",\

// OBSOLETE                       "r17",\

// OBSOLETE                       "r18",\

// OBSOLETE                       "r19",\

// OBSOLETE                       "r20",\

// OBSOLETE                       "r21",\

// OBSOLETE                       "r22",\

// OBSOLETE                       "r23",\

// OBSOLETE                       "r24",\

// OBSOLETE                       "r25",\

// OBSOLETE                       "r26",\

// OBSOLETE                       "r27",\

// OBSOLETE                       "r28",\

// OBSOLETE                       "r29",\

// OBSOLETE                       "r30",\

// OBSOLETE                       "r31",\

// OBSOLETE                       "psr",\

// OBSOLETE                       "fpsr",\

// OBSOLETE                       "fpcr",\

// OBSOLETE                       "sxip",\

// OBSOLETE                       "snip",\

// OBSOLETE                       "sfip",\

// OBSOLETE                       "x0",\

// OBSOLETE                       "x1",\

// OBSOLETE                       "x2",\

// OBSOLETE                       "x3",\

// OBSOLETE                       "x4",\

// OBSOLETE                       "x5",\

// OBSOLETE                       "x6",\

// OBSOLETE                       "x7",\

// OBSOLETE                       "x8",\

// OBSOLETE                       "x9",\

// OBSOLETE                       "x10",\

// OBSOLETE                       "x11",\

// OBSOLETE                       "x12",\

// OBSOLETE                       "x13",\

// OBSOLETE                       "x14",\

// OBSOLETE                       "x15",\

// OBSOLETE                       "x16",\

// OBSOLETE                       "x17",\

// OBSOLETE                       "x18",\

// OBSOLETE                       "x19",\

// OBSOLETE                       "x20",\

// OBSOLETE                       "x21",\

// OBSOLETE                       "x22",\

// OBSOLETE                       "x23",\

// OBSOLETE                       "x24",\

// OBSOLETE                       "x25",\

// OBSOLETE                       "x26",\

// OBSOLETE                       "x27",\

// OBSOLETE                       "x28",\

// OBSOLETE                       "x29",\

// OBSOLETE                       "x30",\

// OBSOLETE                       "x31",\

// OBSOLETE                       "vbr",\

// OBSOLETE                       "dmt0",\

// OBSOLETE                       "dmd0",\

// OBSOLETE                       "dma0",\

// OBSOLETE                       "dmt1",\

// OBSOLETE                       "dmd1",\

// OBSOLETE                       "dma1",\

// OBSOLETE                       "dmt2",\

// OBSOLETE                       "dmd2",\

// OBSOLETE                       "dma2",\

// OBSOLETE                       "sr0",\

// OBSOLETE                       "sr1",\

// OBSOLETE                       "sr2",\

// OBSOLETE                       "sr3",\

// OBSOLETE                       "fpecr",\

// OBSOLETE                       "fphs1",\

// OBSOLETE                       "fpls1",\

// OBSOLETE                       "fphs2",\

// OBSOLETE                       "fpls2",\

// OBSOLETE                       "fppt",\

// OBSOLETE                       "fprh",\

// OBSOLETE                       "fprl",\

// OBSOLETE                       "fpit",\

// OBSOLETE                       "fpsr",\

// OBSOLETE                       "fpcr",\

// OBSOLETE                   }

// OBSOLETE 

// OBSOLETE 

// OBSOLETE /* Register numbers of various important registers.

// OBSOLETE    Note that some of these values are "real" register numbers,

// OBSOLETE    and correspond to the general registers of the machine,

// OBSOLETE    and some are "phony" register numbers which are too large

// OBSOLETE    to be actual register numbers as far as the user is concerned

// OBSOLETE    but do serve to get the desired values when passed to read_register.  */

// OBSOLETE 

// OBSOLETE #define R0_REGNUM 0         /* Contains the constant zero */

// OBSOLETE #define SRP_REGNUM 1                /* Contains subroutine return pointer */

// OBSOLETE #define RV_REGNUM 2         /* Contains simple return values */

// OBSOLETE #define SRA_REGNUM 12               /* Contains address of struct return values */

// OBSOLETE #define SP_REGNUM 31                /* Contains address of top of stack */

// OBSOLETE 

// OBSOLETE /* Instruction pointer notes...

// OBSOLETE 

// OBSOLETE    On the m88100:

// OBSOLETE 

// OBSOLETE    * cr04 = sxip.  On exception, contains the excepting pc (probably).

// OBSOLETE    On rte, is ignored.

// OBSOLETE 

// OBSOLETE    * cr05 = snip.  On exception, contains the NPC (next pc).  On rte,

// OBSOLETE    pc is loaded from here.

// OBSOLETE 

// OBSOLETE    * cr06 = sfip.  On exception, contains the NNPC (next next pc).  On

// OBSOLETE    rte, the NPC is loaded from here.

// OBSOLETE 

// OBSOLETE    * lower two bits of each are flag bits.  Bit 1 is V means address

// OBSOLETE    is valid.  If address is not valid, bit 0 is ignored.  Otherwise,

// OBSOLETE    bit 0 is E and asks for an exception to be taken if this

// OBSOLETE    instruction is executed.

// OBSOLETE 

// OBSOLETE    On the m88110:

// OBSOLETE 

// OBSOLETE    * cr04 = exip.  On exception, contains the address of the excepting

// OBSOLETE    pc (always).  On rte, pc is loaded from here.  Bit 0, aka the D

// OBSOLETE    bit, is a flag saying that the offending instruction was in a

// OBSOLETE    branch delay slot.  If set, then cr05 contains the NPC.

// OBSOLETE 

// OBSOLETE    * cr05 = enip.  On exception, if the instruction pointed to by cr04

// OBSOLETE    was in a delay slot as indicated by the bit 0 of cr04, aka the D

// OBSOLETE    bit, the cr05 contains the NPC.  Otherwise ignored.

// OBSOLETE 

// OBSOLETE    * cr06 is invalid  */

// OBSOLETE 

// OBSOLETE /* Note that the Harris Unix kernels emulate the m88100's behavior on

// OBSOLETE    the m88110.  */

// OBSOLETE 

// OBSOLETE #define SXIP_REGNUM 35              /* On m88100, Contains Shadow Execute

// OBSOLETE                                Instruction Pointer.  */

// OBSOLETE #define SNIP_REGNUM 36              /* On m88100, Contains Shadow Next

// OBSOLETE                                Instruction Pointer.  */

// OBSOLETE #define SFIP_REGNUM 37              /* On m88100, Contains Shadow Fetched

// OBSOLETE                                Intruction pointer.  */

// OBSOLETE 

// OBSOLETE #define EXIP_REGNUM 35              /* On m88110, Contains Exception

// OBSOLETE                                Executing Instruction Pointer.  */

// OBSOLETE #define ENIP_REGNUM 36              /* On m88110, Contains the Exception

// OBSOLETE                                Next Instruction Pointer.  */

// OBSOLETE 

// OBSOLETE #define PC_REGNUM SXIP_REGNUM       /* Program Counter */

// OBSOLETE #define NPC_REGNUM SNIP_REGNUM      /* Next Program Counter */

// OBSOLETE #define M88K_NNPC_REGNUM SFIP_REGNUM        /* Next Next Program Counter */

// OBSOLETE 

// OBSOLETE 

// OBSOLETE #define PSR_REGNUM 32               /* Processor Status Register */

// OBSOLETE #define FPSR_REGNUM 33              /* Floating Point Status Register */

// OBSOLETE #define FPCR_REGNUM 34              /* Floating Point Control Register */

// OBSOLETE #define XFP_REGNUM 38               /* First Extended Float Register */

// OBSOLETE #define X0_REGNUM XFP_REGNUM        /* Which also contains the constant zero */

// OBSOLETE 

// OBSOLETE /* This is rather a confusing lie.  Our m88k port using a stack pointer value

// OBSOLETE    for the frame address.  Hence, the frame address and the frame pointer are

// OBSOLETE    only indirectly related.  The value of this macro is the register number

// OBSOLETE    fetched by the machine "independent" portions of gdb when they want to know

// OBSOLETE    about a frame address.  Thus, we lie here and claim that FP_REGNUM is

// OBSOLETE    SP_REGNUM.  */

// OBSOLETE #define FP_REGNUM SP_REGNUM /* Reg fetched to locate frame when pgm stops */

// OBSOLETE #define ACTUAL_FP_REGNUM 30

// OBSOLETE 

// OBSOLETE /* PSR status bit definitions.  */

// OBSOLETE 

// OBSOLETE #define PSR_MODE            0x80000000

// OBSOLETE #define PSR_BYTE_ORDER              0x40000000

// OBSOLETE #define PSR_SERIAL_MODE             0x20000000

// OBSOLETE #define PSR_CARRY           0x10000000

// OBSOLETE #define PSR_SFU_DISABLE             0x000003f0

// OBSOLETE #define PSR_SFU1_DISABLE    0x00000008

// OBSOLETE #define PSR_MXM                     0x00000004

// OBSOLETE #define PSR_IND                     0x00000002

// OBSOLETE #define PSR_SFRZ            0x00000001

// OBSOLETE 

// OBSOLETE 

// OBSOLETE 

// OBSOLETE /* The following two comments come from the days prior to the m88110

// OBSOLETE    port.  The m88110 handles the instruction pointers differently.  I

// OBSOLETE    do not know what any m88110 kernels do as the m88110 port I'm

// OBSOLETE    working with is for an embedded system.  rich@cygnus.com

// OBSOLETE    13-sept-93.  */

// OBSOLETE 

// OBSOLETE /* BCS requires that the SXIP_REGNUM (or PC_REGNUM) contain the

// OBSOLETE    address of the next instr to be executed when a breakpoint occurs.

// OBSOLETE    Because the kernel gets the next instr (SNIP_REGNUM), the instr in

// OBSOLETE    SNIP needs to be put back into SFIP, and the instr in SXIP should

// OBSOLETE    be shifted to SNIP */

// OBSOLETE 

// OBSOLETE /* Are you sitting down?  It turns out that the 88K BCS (binary

// OBSOLETE    compatibility standard) folks originally felt that the debugger

// OBSOLETE    should be responsible for backing up the IPs, not the kernel (as is

// OBSOLETE    usually done).  Well, they have reversed their decision, and in

// OBSOLETE    future releases our kernel will be handling the backing up of the

// OBSOLETE    IPs.  So, eventually, we won't need to do the SHIFT_INST_REGS

// OBSOLETE    stuff.  But, for now, since there are 88K systems out there that do

// OBSOLETE    need the debugger to do the IP shifting, and since there will be

// OBSOLETE    systems where the kernel does the shifting, the code is a little

// OBSOLETE    more complex than perhaps it needs to be (we still go inside

// OBSOLETE    SHIFT_INST_REGS, and if the shifting hasn't occurred then gdb goes

// OBSOLETE    ahead and shifts).  */

// OBSOLETE 

// OBSOLETE extern int target_is_m88110;

// OBSOLETE #define SHIFT_INST_REGS() \

// OBSOLETE if (!target_is_m88110) \

// OBSOLETE { \

// OBSOLETE     CORE_ADDR pc = read_register (PC_REGNUM); \

// OBSOLETE     CORE_ADDR npc = read_register (NPC_REGNUM); \

// OBSOLETE     if (pc != npc) \

// OBSOLETE     { \

// OBSOLETE     write_register (M88K_NNPC_REGNUM, npc); \

// OBSOLETE     write_register (NPC_REGNUM, pc); \

// OBSOLETE     } \

// OBSOLETE }

// OBSOLETE 

// OBSOLETE     /* Storing the following registers is a no-op. */

// OBSOLETE #define CANNOT_STORE_REGISTER(regno)        (((regno) == R0_REGNUM) \

// OBSOLETE                                      || ((regno) == X0_REGNUM))

// OBSOLETE 

// OBSOLETE   /* Number of bytes of storage in the actual machine representation

// OBSOLETE      for register N.  On the m88k,  the general purpose registers are 4

// OBSOLETE      bytes and the 88110 extended registers are 10 bytes. */

// OBSOLETE 

// OBSOLETE #define REGISTER_RAW_SIZE(N) ((N) < XFP_REGNUM ? 4 : 10)

// OBSOLETE 

// OBSOLETE   /* Total amount of space needed to store our copies of the machine's

// OBSOLETE      register state, the array `registers'.  */

// OBSOLETE 

// OBSOLETE #define REGISTER_BYTES ((GP_REGS * REGISTER_RAW_SIZE(0)) \

// OBSOLETE                     + (FP_REGS * REGISTER_RAW_SIZE(XFP_REGNUM)))

// OBSOLETE 

// OBSOLETE   /* Index within `registers' of the first byte of the space for

// OBSOLETE      register N.  */

// OBSOLETE 

// OBSOLETE #define REGISTER_BYTE(N) (((N) * REGISTER_RAW_SIZE(0)) \

// OBSOLETE                       + ((N) >= XFP_REGNUM \

// OBSOLETE                          ? (((N) - XFP_REGNUM) \

// OBSOLETE                             * REGISTER_RAW_SIZE(XFP_REGNUM)) \

// OBSOLETE                          : 0))

// OBSOLETE 

// OBSOLETE   /* Number of bytes of storage in the program's representation for

// OBSOLETE      register N.  On the m88k, all registers are 4 bytes excepting the

// OBSOLETE      m88110 extended registers which are 8 byte doubles. */

// OBSOLETE 

// OBSOLETE #define REGISTER_VIRTUAL_SIZE(N) ((N) < XFP_REGNUM ? 4 : 8)

// OBSOLETE 

// OBSOLETE   /* Largest value REGISTER_RAW_SIZE can have.  */

// OBSOLETE 

// OBSOLETE #define MAX_REGISTER_RAW_SIZE (REGISTER_RAW_SIZE(XFP_REGNUM))

// OBSOLETE 

// OBSOLETE   /* Largest value REGISTER_VIRTUAL_SIZE can have.

// OBSOLETE      Are FPS1, FPS2, FPR "virtual" regisers? */

// OBSOLETE 

// OBSOLETE #define MAX_REGISTER_VIRTUAL_SIZE (REGISTER_RAW_SIZE(XFP_REGNUM))

// OBSOLETE 

// OBSOLETE /* Return the GDB type object for the "standard" data type

// OBSOLETE    of data in register N.  */

// OBSOLETE 

// OBSOLETE struct type *m88k_register_type (int regnum);

// OBSOLETE #define REGISTER_VIRTUAL_TYPE(N) m88k_register_type (N)

// OBSOLETE 

// OBSOLETE /* The 88k call/return conventions call for "small" values to be returned

// OBSOLETE    into consecutive registers starting from r2.  */

// OBSOLETE 

// OBSOLETE #define DEPRECATED_EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \

// OBSOLETE   memcpy ((VALBUF), &(((char *)REGBUF)[REGISTER_BYTE(RV_REGNUM)]), TYPE_LENGTH (TYPE))

// OBSOLETE 

// OBSOLETE #define DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) (*(int *)(REGBUF))

// OBSOLETE 

// OBSOLETE /* Write into appropriate registers a function return value

// OBSOLETE    of type TYPE, given in virtual format.  */

// OBSOLETE 

// OBSOLETE #define STORE_RETURN_VALUE(TYPE,VALBUF) \

// OBSOLETE   write_register_bytes (2*REGISTER_RAW_SIZE(0), (VALBUF), TYPE_LENGTH (TYPE))

// OBSOLETE 

// OBSOLETE /* In COFF, if PCC says a parameter is a short or a char, do not

// OBSOLETE    change it to int (it seems the convention is to change it). */

// OBSOLETE 

// OBSOLETE #define BELIEVE_PCC_PROMOTION 1

// OBSOLETE 

// OBSOLETE /* Describe the pointer in each stack frame to the previous stack frame

// OBSOLETE    (its caller).  */

// OBSOLETE 

// OBSOLETE /* FRAME_CHAIN takes a frame's nominal address

// OBSOLETE    and produces the frame's chain-pointer.

// OBSOLETE 

// OBSOLETE    However, if FRAME_CHAIN_VALID returns zero,

// OBSOLETE    it means the given frame is the outermost one and has no caller.  */

// OBSOLETE 

// OBSOLETE extern CORE_ADDR frame_chain ();

// OBSOLETE extern int frame_chain_valid ();

// OBSOLETE extern int frameless_function_invocation ();

// OBSOLETE 

// OBSOLETE #define FRAME_CHAIN(thisframe) \

// OBSOLETE     frame_chain (thisframe)

// OBSOLETE 

// OBSOLETE #define     FRAMELESS_FUNCTION_INVOCATION(frame)    \

// OBSOLETE     (frameless_function_invocation (frame))

// OBSOLETE 

// OBSOLETE /* Define other aspects of the stack frame.  */

// OBSOLETE 

// OBSOLETE #define FRAME_SAVED_PC(FRAME)       \

// OBSOLETE     frame_saved_pc (FRAME)

// OBSOLETE extern CORE_ADDR frame_saved_pc ();

// OBSOLETE 

// OBSOLETE #define FRAME_ARGS_ADDRESS(fi)      \

// OBSOLETE     frame_args_address (fi)

// OBSOLETE extern CORE_ADDR frame_args_address ();

// OBSOLETE 

// OBSOLETE #define FRAME_LOCALS_ADDRESS(fi) \

// OBSOLETE     frame_locals_address (fi)

// OBSOLETE extern CORE_ADDR frame_locals_address ();

// OBSOLETE 

// OBSOLETE /* Return number of args passed to a frame.

// OBSOLETE    Can return -1, meaning no way to tell.  */

// OBSOLETE 

// OBSOLETE #define FRAME_NUM_ARGS(fi)  (-1)

// OBSOLETE 

// OBSOLETE /* Return number of bytes at start of arglist that are not really args.  */

// OBSOLETE 

// OBSOLETE #define FRAME_ARGS_SKIP 0

// OBSOLETE 

// OBSOLETE /* Put here the code to store, into a struct frame_saved_regs,

// OBSOLETE    the addresses of the saved registers of frame described by FRAME_INFO.

// OBSOLETE    This includes special registers such as pc and fp saved in special

// OBSOLETE    ways in the stack frame.  sp is even more special:

// OBSOLETE    the address we return for it IS the sp for the next frame.  */

// OBSOLETE 

// OBSOLETE /* On the 88k, parameter registers get stored into the so called "homing"

// OBSOLETE    area.  This *always* happens when you compiled with GCC and use -g.

// OBSOLETE    Also, (with GCC and -g) the saving of the parameter register values

// OBSOLETE    always happens right within the function prologue code, so these register

// OBSOLETE    values can generally be relied upon to be already copied into their

// OBSOLETE    respective homing slots by the time you will normally try to look at

// OBSOLETE    them (we hope).

// OBSOLETE 

// OBSOLETE    Note that homing area stack slots are always at *positive* offsets from

// OBSOLETE    the frame pointer.  Thus, the homing area stack slots for the parameter

// OBSOLETE    registers (passed values) for a given function are actually part of the

// OBSOLETE    frame area of the caller.  This is unusual, but it should not present

// OBSOLETE    any special problems for GDB.

// OBSOLETE 

// OBSOLETE    Note also that on the 88k, we are only interested in finding the

// OBSOLETE    registers that might have been saved in memory.  This is a subset of

// OBSOLETE    the whole set of registers because the standard calling sequence allows

// OBSOLETE    the called routine to clobber many registers.

// OBSOLETE 

// OBSOLETE    We could manage to locate values for all of the so called "preserved"

// OBSOLETE    registers (some of which may get saved within any particular frame) but

// OBSOLETE    that would require decoding all of the tdesc information.  That would be

// OBSOLETE    nice information for GDB to have, but it is not strictly manditory if we

// OBSOLETE    can live without the ability to look at values within (or backup to)

// OBSOLETE    previous frames.

// OBSOLETE  */

// OBSOLETE 

// OBSOLETE struct frame_saved_regs;

// OBSOLETE struct frame_info;

// OBSOLETE 

// OBSOLETE void frame_find_saved_regs (struct frame_info *fi,

// OBSOLETE                         struct frame_saved_regs *fsr);

// OBSOLETE 

// OBSOLETE #define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \

// OBSOLETE         frame_find_saved_regs (frame_info, &frame_saved_regs)

// OBSOLETE 

// OBSOLETE 

// OBSOLETE #define POP_FRAME pop_frame ()

// OBSOLETE extern void pop_frame ();

// OBSOLETE 

// OBSOLETE /* Call function stuff contributed by Kevin Buettner of Motorola.  */

// OBSOLETE 

// OBSOLETE #define CALL_DUMMY_LOCATION AFTER_TEXT_END

// OBSOLETE 

// OBSOLETE extern void m88k_push_dummy_frame ();

// OBSOLETE #define PUSH_DUMMY_FRAME    m88k_push_dummy_frame()

// OBSOLETE 

// OBSOLETE #define CALL_DUMMY {                                \

// OBSOLETE 0x67ff00c0, /*   0:   subu  #sp,#sp,0xc0 */ \

// OBSOLETE 0x243f0004, /*   4:   st    #r1,#sp,0x4 */ \

// OBSOLETE 0x245f0008, /*   8:   st    #r2,#sp,0x8 */ \

// OBSOLETE 0x247f000c, /*   c:   st    #r3,#sp,0xc */ \

// OBSOLETE 0x249f0010, /*  10:   st    #r4,#sp,0x10 */ \

// OBSOLETE 0x24bf0014, /*  14:   st    #r5,#sp,0x14 */ \

// OBSOLETE 0x24df0018, /*  18:   st    #r6,#sp,0x18 */ \

// OBSOLETE 0x24ff001c, /*  1c:   st    #r7,#sp,0x1c */ \

// OBSOLETE 0x251f0020, /*  20:   st    #r8,#sp,0x20 */ \

// OBSOLETE 0x253f0024, /*  24:   st    #r9,#sp,0x24 */ \

// OBSOLETE 0x255f0028, /*  28:   st    #r10,#sp,0x28 */ \

// OBSOLETE 0x257f002c, /*  2c:   st    #r11,#sp,0x2c */ \

// OBSOLETE 0x259f0030, /*  30:   st    #r12,#sp,0x30 */ \

// OBSOLETE 0x25bf0034, /*  34:   st    #r13,#sp,0x34 */ \

// OBSOLETE 0x25df0038, /*  38:   st    #r14,#sp,0x38 */ \

// OBSOLETE 0x25ff003c, /*  3c:   st    #r15,#sp,0x3c */ \

// OBSOLETE 0x261f0040, /*  40:   st    #r16,#sp,0x40 */ \

// OBSOLETE 0x263f0044, /*  44:   st    #r17,#sp,0x44 */ \

// OBSOLETE 0x265f0048, /*  48:   st    #r18,#sp,0x48 */ \

// OBSOLETE 0x267f004c, /*  4c:   st    #r19,#sp,0x4c */ \

// OBSOLETE 0x269f0050, /*  50:   st    #r20,#sp,0x50 */ \

// OBSOLETE 0x26bf0054, /*  54:   st    #r21,#sp,0x54 */ \

// OBSOLETE 0x26df0058, /*  58:   st    #r22,#sp,0x58 */ \

// OBSOLETE 0x26ff005c, /*  5c:   st    #r23,#sp,0x5c */ \

// OBSOLETE 0x271f0060, /*  60:   st    #r24,#sp,0x60 */ \

// OBSOLETE 0x273f0064, /*  64:   st    #r25,#sp,0x64 */ \

// OBSOLETE 0x275f0068, /*  68:   st    #r26,#sp,0x68 */ \

// OBSOLETE 0x277f006c, /*  6c:   st    #r27,#sp,0x6c */ \

// OBSOLETE 0x279f0070, /*  70:   st    #r28,#sp,0x70 */ \

// OBSOLETE 0x27bf0074, /*  74:   st    #r29,#sp,0x74 */ \

// OBSOLETE 0x27df0078, /*  78:   st    #r30,#sp,0x78 */ \

// OBSOLETE 0x63df0000, /*  7c:   addu  #r30,#sp,0x0 */ \

// OBSOLETE 0x145f0000, /*  80:   ld    #r2,#sp,0x0 */ \

// OBSOLETE 0x147f0004, /*  84:   ld    #r3,#sp,0x4 */ \

// OBSOLETE 0x149f0008, /*  88:   ld    #r4,#sp,0x8 */ \

// OBSOLETE 0x14bf000c, /*  8c:   ld    #r5,#sp,0xc */ \

// OBSOLETE 0x14df0010, /*  90:   ld    #r6,#sp,0x10 */ \

// OBSOLETE 0x14ff0014, /*  94:   ld    #r7,#sp,0x14 */ \

// OBSOLETE 0x151f0018, /*  98:   ld    #r8,#sp,0x18 */ \

// OBSOLETE 0x153f001c, /*  9c:   ld    #r9,#sp,0x1c */ \

// OBSOLETE 0x5c200000, /*  a0:   or.u  #r1,#r0,0x0 */ \

// OBSOLETE 0x58210000, /*  a4:   or    #r1,#r1,0x0 */ \

// OBSOLETE 0xf400c801, /*  a8:   jsr   #r1 */ \

// OBSOLETE 0xf000d1ff  /*  ac:   tb0   0x0,#r0,0x1ff */ \

// OBSOLETE }

// OBSOLETE 

// OBSOLETE #define CALL_DUMMY_START_OFFSET 0x80

// OBSOLETE #define CALL_DUMMY_LENGTH 0xb0

// OBSOLETE 

// OBSOLETE /* FIXME: byteswapping.  */

// OBSOLETE #define FIX_CALL_DUMMY(dummy, pc, fun, nargs, args, type, gcc_p)    \

// OBSOLETE {                                                                   \

// OBSOLETE   *(unsigned long *)((char *) (dummy) + 0xa0) |=                    \

// OBSOLETE     (((unsigned long) (fun)) >> 16);                                \

// OBSOLETE   *(unsigned long *)((char *) (dummy) + 0xa4) |=                    \

// OBSOLETE     (((unsigned long) (fun)) & 0xffff);                             \

// OBSOLETE }

// OBSOLETE 

// OBSOLETE /* Stack must be aligned on 64-bit boundaries when synthesizing

// OBSOLETE    function calls. */

// OBSOLETE 

// OBSOLETE #define STACK_ALIGN(addr) (((addr) + 7) & -8)

// OBSOLETE 

// OBSOLETE #define STORE_STRUCT_RETURN(addr, sp) \

// OBSOLETE     write_register (SRA_REGNUM, (addr))

// OBSOLETE 

// OBSOLETE #define NEED_TEXT_START_END 1

// OBSOLETE 

// OBSOLETE /* According to the MC88100 RISC Microprocessor User's Manual, section

// OBSOLETE    6.4.3.1.2:

// OBSOLETE 

// OBSOLETE    ... can be made to return to a particular instruction by placing a

// OBSOLETE    valid instruction address in the SNIP and the next sequential

// OBSOLETE    instruction address in the SFIP (with V bits set and E bits clear).

// OBSOLETE    The rte resumes execution at the instruction pointed to by the 

// OBSOLETE    SNIP, then the SFIP.

// OBSOLETE 

// OBSOLETE    The E bit is the least significant bit (bit 0).  The V (valid) bit is

// OBSOLETE    bit 1.  This is why we logical or 2 into the values we are writing

// OBSOLETE    below.  It turns out that SXIP plays no role when returning from an

// OBSOLETE    exception so nothing special has to be done with it.  We could even

// OBSOLETE    (presumably) give it a totally bogus value.

// OBSOLETE 

// OBSOLETE    -- Kevin Buettner

// OBSOLETE  */

// OBSOLETE 

// OBSOLETE extern void m88k_target_write_pc (CORE_ADDR pc, ptid_t ptid);

// OBSOLETE #define TARGET_WRITE_PC(VAL, PID) m88k_target_write_pc (VAL, PID)