/* Parameters for execution on a 68000 series machine.
- Copyright 1986, 1987, 1989, 1990, 1992 Free Software Foundation, Inc.
+ Copyright 1986, 1987, 1989, 1990, 1992, 1993, 1994, 1995, 1996, 1998,
+ 1999, 2000 Free Software Foundation, Inc.
-This file is part of GDB.
+ 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 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.
+ 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. */
+ 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. */
-/* Generic 68000 stuff, to be included by other tm-*.h files. */
+#include "regcache.h"
-#define IEEE_FLOAT 1
+#define GDB_MULTI_ARCH GDB_MULTI_ARCH_PARTIAL
-/* 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. */
-
-#if !defined(SKIP_PROLOGUE)
-#define SKIP_PROLOGUE(ip) {(ip) = m68k_skip_prologue(ip);}
-extern CORE_ADDR m68k_skip_prologue PARAMS ((CORE_ADDR ip));
-#endif
-
-/* 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. */
-
-#ifdef __STDC__
-struct frame_info;
-struct frame_saved_regs;
-#endif
-
-extern CORE_ADDR m68k_saved_pc_after_call PARAMS ((struct frame_info *));
-extern void m68k_find_saved_regs PARAMS ((struct frame_info *, struct frame_saved_regs *));
-
-#define SAVED_PC_AFTER_CALL(frame) \
- m68k_saved_pc_after_call(frame)
-
-/* Stack grows downward. */
-
-#define INNER_THAN(lhs,rhs) ((lhs) < (rhs))
-
-/* Stack must be kept short aligned when doing function calls. */
-
-#define STACK_ALIGN(ADDR) (((ADDR) + 1) & ~1)
-
-/* Sequence of bytes for breakpoint instruction.
- This is a TRAP instruction. The last 4 bits (0xf below) is the
- vector. Systems which don't use 0xf should define BPT_VECTOR
- themselves before including this file. */
-
-#if !defined (BPT_VECTOR)
-#define BPT_VECTOR 0xf
-#endif
-
-#if !defined (BREAKPOINT)
-#define BREAKPOINT {0x4e, (0x40 | BPT_VECTOR)}
-#endif
-
-/* We default to vector 1 for the "remote" target, but allow targets
- to override. */
-#if !defined (REMOTE_BPT_VECTOR)
-#define REMOTE_BPT_VECTOR 1
-#endif
-
-#if !defined (REMOTE_BREAKPOINT)
-#define REMOTE_BREAKPOINT {0x4e, (0x40 | REMOTE_BPT_VECTOR)}
-#endif
-
-/* If your kernel resets the pc after the trap happens you may need to
- define this before including this file. */
-
-#if !defined (DECR_PC_AFTER_BREAK)
-#define DECR_PC_AFTER_BREAK 2
-#endif
-
-/* Say how long (ordinary) registers are. This is a piece of bogosity
- used in push_word and a few other places; REGISTER_RAW_SIZE is the
- real way to know how big a register is. */
-
-#define REGISTER_SIZE 4
-
-#define REGISTER_BYTES_FP (16*4 + 8 + 8*12 + 3*4)
-#define REGISTER_BYTES_NOFP (16*4 + 8)
-
-#ifndef NUM_REGS
-#define NUM_REGS 29
-#endif
-
-#define NUM_FREGS (NUM_REGS-24)
-
-#ifndef REGISTER_BYTES_OK
-#define REGISTER_BYTES_OK(b) \
- ((b) == REGISTER_BYTES_FP \
- || (b) == REGISTER_BYTES_NOFP)
-#endif
-
-#ifndef REGISTER_BYTES
-#define REGISTER_BYTES (16*4 + 8 + 8*12 + 3*4)
-#endif
-
-/* Index within `registers' of the first byte of the space for
- register N. */
-
-#define REGISTER_BYTE(N) \
- ((N) >= FPC_REGNUM ? (((N) - FPC_REGNUM) * 4) + 168 \
- : (N) >= FP0_REGNUM ? (((N) - FP0_REGNUM) * 12) + 72 \
- : (N) * 4)
-
-/* Number of bytes of storage in the actual machine representation
- for register N. On the 68000, all regs are 4 bytes
- except the floating point regs which are 12 bytes. */
-/* Note that the unsigned cast here forces the result of the
- subtraction to very high positive values if N < FP0_REGNUM */
-
-#define REGISTER_RAW_SIZE(N) (((unsigned)(N) - FP0_REGNUM) < 8 ? 12 : 4)
-
-/* Number of bytes of storage in the program's representation
- for register N. On the 68000, all regs are 4 bytes
- except the floating point regs which are 8-byte doubles. */
-
-#define REGISTER_VIRTUAL_SIZE(N) (((unsigned)(N) - FP0_REGNUM) < 8 ? 8 : 4)
-
-/* Largest value REGISTER_RAW_SIZE can have. */
-
-#define MAX_REGISTER_RAW_SIZE 12
-
-/* Largest value REGISTER_VIRTUAL_SIZE can have. */
-
-#define MAX_REGISTER_VIRTUAL_SIZE 8
-
-/* Nonzero if register N requires conversion
- from raw format to virtual format. */
-
-#define REGISTER_CONVERTIBLE(N) (((unsigned)(N) - FP0_REGNUM) < 8)
-
-#include "floatformat.h"
-
-/* Convert data from raw format for register REGNUM in buffer FROM
- to virtual format with type TYPE in buffer TO. */
-
-#define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,TYPE,FROM,TO) \
-do \
- { \
- DOUBLEST dbl_tmp_val; \
- floatformat_to_doublest (&floatformat_m68881_ext, (FROM), &dbl_tmp_val); \
- store_floating ((TO), TYPE_LENGTH (TYPE), dbl_tmp_val); \
- } while (0)
-
-/* Convert data from virtual format with type TYPE in buffer FROM
- to raw format for register REGNUM in buffer TO. */
-
-#define REGISTER_CONVERT_TO_RAW(TYPE,REGNUM,FROM,TO) \
-do \
- { \
- DOUBLEST dbl_tmp_val; \
- dbl_tmp_val = extract_floating ((FROM), TYPE_LENGTH (TYPE)); \
- floatformat_from_doublest (&floatformat_m68881_ext, &dbl_tmp_val, (TO)); \
- } while (0)
-
-/* Return the GDB type object for the "standard" data type of data
- in register N. This should be int for D0-D7, double for FP0-FP7,
- and void pointer for all others (A0-A7, PC, SR, FPCONTROL etc).
- Note, for registers which contain addresses return pointer to void,
- not pointer to char, because we don't want to attempt to print
- the string after printing the address. */
-
-#define REGISTER_VIRTUAL_TYPE(N) \
- ((unsigned) (N) >= FPC_REGNUM ? lookup_pointer_type (builtin_type_void) : \
- (unsigned) (N) >= FP0_REGNUM ? builtin_type_double : \
- (unsigned) (N) >= A0_REGNUM ? lookup_pointer_type (builtin_type_void) : \
- builtin_type_int)
-
-/* Initializer for an array of names of registers.
- Entries beyond the first NUM_REGS are ignored. */
-
-#define REGISTER_NAMES \
- {"d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7", \
- "a0", "a1", "a2", "a3", "a4", "a5", "fp", "sp", \
- "ps", "pc", \
- "fp0", "fp1", "fp2", "fp3", "fp4", "fp5", "fp6", "fp7", \
- "fpcontrol", "fpstatus", "fpiaddr", "fpcode", "fpflags" }
-
-/* 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 D0_REGNUM 0
-#define A0_REGNUM 8
-#define A1_REGNUM 9
-#define FP_REGNUM 14 /* Contains address of executing stack frame */
-#define SP_REGNUM 15 /* Contains address of top of stack */
-#define PS_REGNUM 16 /* Contains processor status */
-#define PC_REGNUM 17 /* Contains program counter */
-#define FP0_REGNUM 18 /* Floating point register 0 */
-#define FPC_REGNUM 26 /* 68881 control register */
-#define FPS_REGNUM 27 /* 68881 status register */
-#define FPI_REGNUM 28 /* 68881 iaddr register */
-
-/* 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 (A1_REGNUM, (ADDR)); }
-
-/* 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. */
-
-#if !defined (EXTRACT_RETURN_VALUE)
-#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
- memcpy ((VALBUF), \
- (char *)(REGBUF) + \
- (TYPE_LENGTH(TYPE) >= 4 ? 0 : 4 - TYPE_LENGTH(TYPE)), \
- TYPE_LENGTH(TYPE))
-#endif
-
-/* Write into appropriate registers a function return value
- of type TYPE, given in virtual format. Assumes floats are passed
- in d0/d1. */
-
-#if !defined (STORE_RETURN_VALUE)
-#define STORE_RETURN_VALUE(TYPE,VALBUF) \
- write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE))
-#endif
-
-/* 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))
-\f
-/* 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 68000, the frame's nominal address
- is the address of a 4-byte word containing the calling frame's address. */
-
-/* If we are chaining from sigtramp, then manufacture a sigtramp frame
- (which isn't really on the stack. I'm not sure this is right for anything
- but BSD4.3 on an hp300. */
-#define FRAME_CHAIN(thisframe) \
- (thisframe->signal_handler_caller \
- ? thisframe->frame \
- : (!inside_entry_file ((thisframe)->pc) \
- ? read_memory_integer ((thisframe)->frame, 4) \
- : 0))
-
-/* 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) \
- do { \
- if ((FI)->signal_handler_caller) \
- (FRAMELESS) = 0; \
- else \
- (FRAMELESS) = frameless_look_for_prologue(FI); \
- } while (0)
-
-/* This was determined by experimentation on hp300 BSD 4.3. Perhaps
- it corresponds to some offset in /usr/include/sys/user.h or
- something like that. Using some system include file would
- have the advantage of probably being more robust in the face
- of OS upgrades, but the disadvantage of being wrong for
- cross-debugging. */
-
-#define SIG_PC_FP_OFFSET 530
-
-#define FRAME_SAVED_PC(FRAME) \
- (((FRAME)->signal_handler_caller \
- ? ((FRAME)->next \
- ? read_memory_integer ((FRAME)->next->frame + SIG_PC_FP_OFFSET, 4) \
- : read_memory_integer (read_register (SP_REGNUM) \
- + SIG_PC_FP_OFFSET - 8, 4) \
- ) \
- : read_memory_integer ((FRAME)->frame + 4, 4)) \
- )
-
-#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
-
-/* 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. */
-
-#if !defined (FRAME_FIND_SAVED_REGS)
-#define FRAME_FIND_SAVED_REGS(fi,fsr) m68k_find_saved_regs ((fi), &(fsr))
-#endif /* no FIND_FRAME_SAVED_REGS. */
-
-\f
-/* Things needed for making the inferior call functions. */
-
-/* The CALL_DUMMY macro is the sequence of instructions, as disassembled
- by gdb itself:
-
- These instructions exist only so that m68k_find_saved_regs can parse
- them as a "prologue"; they are never executed.
-
- 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. That is where we start
- executing.
-
- 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).
-
- The dummy frame always saves the floating-point registers, whether they
- actually exist on this target or not. */
-
-/* FIXME: Wrong to hardwire this as BPT_VECTOR when sometimes it
- should be REMOTE_BPT_VECTOR. Best way to fix it would be to define
- CALL_DUMMY_BREAKPOINT_OFFSET. */
-
-#define CALL_DUMMY {0xf227e0ff, 0x48e7fffc, 0x426742e7, 0x4eb93232, 0x3232dffc, 0x69696969, (0x4e404e71 | (BPT_VECTOR << 16))}
-#define CALL_DUMMY_LENGTH 28 /* Size of CALL_DUMMY */
-#define CALL_DUMMY_START_OFFSET 12 /* Offset to jsr instruction*/
-#define CALL_DUMMY_BREAKPOINT_OFFSET (CALL_DUMMY_START_OFFSET + 12)
-
-/* 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, (unsigned char *) dummyname + CALL_DUMMY_START_OFFSET + 2); \
- bfd_putb32 (nargs*4, (unsigned char *) dummyname + CALL_DUMMY_START_OFFSET + 8); }
-
-/* Push an empty stack frame, to record the current PC, etc. */
-
-#define PUSH_DUMMY_FRAME { m68k_push_dummy_frame (); }
-
-extern void m68k_push_dummy_frame PARAMS ((void));
-
-extern void m68k_pop_frame PARAMS ((void));
-
-/* Discard from the stack the innermost frame, restoring all registers. */
-
-#define POP_FRAME { m68k_pop_frame (); }
-
-/* Offset from SP to first arg on stack at first instruction of a function */
-
-#define SP_ARG0 (1 * 4)
-
-#define TARGET_M68K
+extern int m68k_get_longjmp_target (CORE_ADDR *);
projects / deliverable / binutils-gdb.git / blobdiff