-/* Copyright (C) 1986, 1987, 1988, 1989, 1990 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-/* g++ support is not yet included. */
-
-#include "tdesc.h"
-
-
-#define TARGET_BYTE_ORDER BIG_ENDIAN
-
-#define EXTRA_SYMTAB_INFO int coffsem;
-
-/* This is not a CREATE_INFERIOR_HOOK because it also applies to
- remote debugging. */
-#define START_INFERIOR_HOOK() \
- { \
- extern int safe_to_init_tdesc_context; \
- extern dc_handle_t tdesc_handle; \
- \
- safe_to_init_tdesc_context = 0; \
- if (tdesc_handle) \
- { \
- dc_terminate (tdesc_handle); \
- tdesc_handle = 0; \
- } \
- }
-
-dc_dcontext_t get_prev_context ();
-extern int stack_error;
-
-#define EXTRA_FRAME_INFO dc_dcontext_t frame_context;
-#define INIT_EXTRA_FRAME_INFO(fromleaf, fci) \
- { \
- if (fci->next_frame != NULL) \
- { \
- extern jmp_buf stack_jmp; \
- struct frame_info *next_frame = fci->next; \
- /* The call to get_prev_context */ \
- /* will update current_context for us. */ \
- stack_error = 1; \
- if (!setjmp (stack_jmp)) \
- { \
- fci->frame_context \
- = get_prev_context (next_frame->frame_context); \
- stack_error = 0; \
- } \
- else \
- { \
- stack_error = 0; \
- next_frame->prev = 0; \
- return 0; \
- } \
- if (!fci->frame_context) \
- { \
- next_frame->prev = 0; \
- return 0; \
- } \
- } \
- else \
- { \
- /* We are creating an arbitrary frame */ \
- /* (i.e. we are in create_new_frame). */ \
- extern dc_dcontext_t current_context; \
- \
- fci->frame_context = current_context; \
- } \
- }
-
-#define INIT_FRAME_PC(fromleaf, prev) \
- { \
- prev->pc = dc_location (prev->frame_context); \
- prev->frame = get_frame_base (prev->pc); \
- }
-
-#define IEEE_FLOAT
-
-/* Text Description (TDESC) is used by m88k to maintain stack & reg info */
-
-#define TDESC
-
-/* Define this if the C compiler puts an underscore at the front
- of external names before giving them to the linker. */
-
-#define NAMES_HAVE_UNDERSCORE
-
-/* Hook for read_relative_register_raw_bytes */
-
-#define READ_RELATIVE_REGISTER_RAW_BYTES
-
-/* 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(frompc) 0
-
-/* The m88k kernel aligns all instructions on 4-byte boundaries. The
- kernel also uses the least significant two bits for its own hocus
- pocus. When gdb receives an address from the kernel, it needs to
- preserve those right-most two bits, but gdb also needs to be careful
- to realize that those two bits are not really a part of the address
- of an instruction. Shrug. */
-
-#define ADDR_BITS_REMOVE(addr) ((addr) & ~3)
-#define ADDR_BITS_SET(addr) (((addr) | 0x00000002) - 4)
-
-/* 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_register (SRP_REGNUM) & (~3))
-
-/* Address of end of stack space. */
-
-#define STACK_END_ADDR 0xF0000000
-
-/* Stack grows downward. */
-
-#define INNER_THAN <
-
-/* Sequence of bytes for breakpoint instruction. */
-
-/* instruction 0xF000D1FF is 'tb0 0,r0,511'
- If Bit bit 0 of r0 is clear (always true),
- initiate exception processing (trap).
- */
-#define BREAKPOINT {0xF0, 0x00, 0xD1, 0xFF}
-
-/* Address of end of stack space. */
-
-#define STACK_END_ADDR 0xF0000000
-
-/* Stack grows downward. */
-
-#define INNER_THAN <
-
-/* Sequence of bytes for breakpoint instruction. */
-
-/* instruction 0xF000D1FF is 'tb0 0,r0,511'
- If Bit bit 0 of r0 is clear (always true),
- initiate exception processing (trap).
- */
-#define BREAKPOINT {0xF0, 0x00, 0xD1, 0xFF}
-
-/* Amount PC must be decremented by after a breakpoint.
- This is often the number of bytes in BREAKPOINT
- but not always. */
-
-#define DECR_PC_AFTER_BREAK 0
-
-/* Nonzero if instruction at PC is a return instruction. */
-/* 'jmp r1' or 'jmp.n r1' is used to return from a subroutine. */
-
-#define ABOUT_TO_RETURN(pc) (read_memory_integer (pc, 2) == 0xF800)
-
-/* Return 1 if P points to an invalid floating point value.
- LEN is the length in bytes -- not relevant on the 386. */
-
-#define INVALID_FLOAT(p, len) IEEE_isNAN(p,len)
-
-/* Say how long (ordinary) registers are. */
-
-#define REGISTER_TYPE long
-
-/* Number of machine registers */
-
-#define NUM_REGS 38
-
-/* Initializer for an array of names of registers.
- There should be NUM_REGS strings in this initializer. */
-
-#define REGISTER_NAMES {\
- "r0",\
- "r1",\
- "r2",\
- "r3",\
- "r4",\
- "r5",\
- "r6",\
- "r7",\
- "r8",\
- "r9",\
- "r10",\
- "r11",\
- "r12",\
- "r13",\
- "r14",\
- "r15",\
- "r16",\
- "r17",\
- "r18",\
- "r19",\
- "r20",\
- "r21",\
- "r22",\
- "r23",\
- "r24",\
- "r25",\
- "r26",\
- "r27",\
- "r28",\
- "r29",\
- "r30",\
- "r31",\
- "psr",\
- "fpsr",\
- "fpcr",\
- "sxip",\
- "snip",\
- "sfip",\
- "vbr",\
- "dmt0",\
- "dmd0",\
- "dma0",\
- "dmt1",\
- "dmd1",\
- "dma1",\
- "dmt2",\
- "dmd2",\
- "dma2",\
- "sr0",\
- "sr1",\
- "sr2",\
- "sr3",\
- "fpecr",\
- "fphs1",\
- "fpls1",\
- "fphs2",\
- "fpls2",\
- "fppt",\
- "fprh",\
- "fprl",\
- "fpit",\
- "fpsr",\
- "fpcr",\
- };
-
-
-/* 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 SRP_REGNUM 1 /* Contains subroutine return pointer */
-#define RV_REGNUM 2 /* Contains simple return values */
-#define SRA_REGNUM 12 /* Contains address of struct return values */
-#define FP_REGNUM 30 /* Contains address of executing stack frame */
-#define SP_REGNUM 31 /* Contains address of top of stack */
-#define SXIP_REGNUM 35 /* Contains Shadow Execute Instruction Pointer */
-#define SNIP_REGNUM 36 /* Contains Shadow Next Instruction Pointer */
-#define PC_REGNUM SXIP_REGNUM /* Program Counter */
-#define NPC_REGNUM SNIP_REGNUM /* Next Program Counter */
-#define PSR_REGNUM 32 /* Processor Status Register */
-#define FPSR_REGNUM 33 /* Floating Point Status Register */
-#define FPCR_REGNUM 34 /* Floating Point Control Register */
-#define SFIP_REGNUM 37 /* Contains Shadow Fetched Intruction pointer */
-#define NNPC_REGNUM SFIP_REGNUM /* Next Next Program Counter */
-
-/* PSR status bit definitions. */
-
-#define PSR_MODE 0x80000000
-#define PSR_BYTE_ORDER 0x40000000
-#define PSR_SERIAL_MODE 0x20000000
-#define PSR_CARRY 0x10000000
-#define PSR_SFU_DISABLE 0x000003f0
-#define PSR_SFU1_DISABLE 0x00000008
-#define PSR_MXM 0x00000004
-#define PSR_IND 0x00000002
-#define PSR_SFRZ 0x00000001
-
-/* BCS requires that the SXIP_REGNUM (or PC_REGNUM) contain the address
- of the next instr to be executed when a breakpoint occurs. Because
- the kernel gets the next instr (SNIP_REGNUM), the instr in SNIP needs
- to be put back into SFIP, and the instr in SXIP should be shifted
- to SNIP */
-
-/* Are you sitting down? It turns out that the 88K BCS (binary compatibility
- standard) folks originally felt that the debugger should be responsible
- for backing up the IPs, not the kernel (as is usually done). Well, they
- have reversed their decision, and in future releases our kernel will be
- handling the backing up of the IPs. So, eventually, we won't need to
- do the SHIFT_INST_REGS stuff. But, for now, since there are 88K systems out
- there that do need the debugger to do the IP shifting, and since there
- will be systems where the kernel does the shifting, the code is a little
- more complex than perhaps it needs to be (we still go inside SHIFT_INST_REGS,
- and if the shifting hasn't occurred then gdb goes ahead and shifts). */
-
-#define SHIFT_INST_REGS
-
-/* Total amount of space needed to store our copies of the machine's
- register state, the array `registers'. */
-
-#define REGISTER_BYTES (NUM_REGS * sizeof(REGISTER_TYPE))
-
-/* Index within `registers' of the first byte of the space for
- register N. */
-
-#define REGISTER_BYTE(N) ((N)*sizeof(REGISTER_TYPE))
-
-/* Number of bytes of storage in the actual machine representation
- for register N. */
-
-#define REGISTER_RAW_SIZE(N) (sizeof(REGISTER_TYPE))
-
-/* Number of bytes of storage in the program's representation
- for register N. */
-
-#define REGISTER_VIRTUAL_SIZE(N) (sizeof(REGISTER_TYPE))
-
-/* Largest value REGISTER_RAW_SIZE can have. */
-
-#define MAX_REGISTER_RAW_SIZE (sizeof(REGISTER_TYPE))
-
-/* Largest value REGISTER_VIRTUAL_SIZE can have.
-/* Are FPS1, FPS2, FPR "virtual" regisers? */
-
-#define MAX_REGISTER_VIRTUAL_SIZE (sizeof(REGISTER_TYPE))
-
-/* Nonzero if register N requires conversion
- from raw format to virtual format. */
-
-#define REGISTER_CONVERTIBLE(N) (0)
-
-/* Convert data from raw format for register REGNUM
- to virtual format for register REGNUM. */
-
-#define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,FROM,TO) {bcopy ((FROM), (TO), (sizeof(REGISTER_TYPE)));}
-
-/* Convert data from virtual format for register REGNUM
- to raw format for register REGNUM. */
-
-#define REGISTER_CONVERT_TO_RAW(REGNUM,FROM,TO) {bcopy ((FROM), (TO), (sizeof(REGISTER_TYPE)));}
-
-/* Return the GDB type object for the "standard" data type
- of data in register N. */
-
-#define REGISTER_VIRTUAL_TYPE(N) (builtin_type_int)
-
-/* The 88k call/return conventions call for "small" values to be returned
- into consecutive registers starting from r2. */
-
-#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
- bcopy (&(((char *)REGBUF)[REGISTER_BYTE(RV_REGNUM)]), (VALBUF), TYPE_LENGTH (TYPE))
-
-#define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) (*(int *)(REGBUF))
-
-/* Write into appropriate registers a function return value
- of type TYPE, given in virtual format. */
-
-#define STORE_RETURN_VALUE(TYPE,VALBUF) \
- write_register_bytes (2*sizeof(void*), (VALBUF), TYPE_LENGTH (TYPE))
-
-/* In COFF, if PCC says a parameter is a short or a char, do not
- change it to int (it seems the convention is to change it). */
-
-#define BELIEVE_PCC_PROMOTION 1
-
-/* We provide our own get_saved_register in m88k-tdep.c. */
-#define GET_SAVED_REGISTER
-
-/* 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.
-
- FRAME_CHAIN_COMBINE takes the chain pointer and the frame's nominal address
- and produces the nominal address of the caller frame.
-
- However, if FRAME_CHAIN_VALID returns zero,
- it means the given frame is the outermost one and has no caller.
- In that case, FRAME_CHAIN_COMBINE is not used. */
-
-/* These are just dummies for the 88k because INIT_FRAME_PC sets prev->frame
- instead. */
-
-#define FRAME_CHAIN(thisframe) (0)
-
-#define FRAME_CHAIN_VALID(chain, thisframe) (1)
-
-#define FRAME_CHAIN_COMBINE(chain, thisframe) (0)
-
-/* Define other aspects of the stack frame. */
-
-#define FRAME_SAVED_PC(FRAME) (read_memory_integer ((FRAME)->frame+4, 4))
-
-#define FRAME_ARGS_ADDRESS(fi) ((fi)->frame)
-
-#define FRAME_LOCALS_ADDRESS(fi) ((fi)->frame)
-
-/* Return number of args passed to a frame.
- Can return -1, meaning no way to tell. */
-
-#define FRAME_NUM_ARGS(numargs, fi) ((numargs) = -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. */
-
-/* On the 88k, parameter registers get stored into the so called "homing"
- area. This *always* happens when you compiled with GCC and use -g.
- Also, (with GCC and -g) the saving of the parameter register values
- always happens right within the function prologue code, so these register
- values can generally be relied upon to be already copied into their
- respective homing slots by the time you will normally try to look at
- them (we hope).
-
- Note that homing area stack slots are always at *positive* offsets from
- the frame pointer. Thus, the homing area stack slots for the parameter
- registers (passed values) for a given function are actually part of the
- frame area of the caller. This is unusual, but it should not present
- any special problems for GDB.
-
- Note also that on the 88k, we are only interested in finding the
- registers that might have been saved in memory. This is a subset of
- the whole set of registers because the standard calling sequence allows
- the called routine to clobber many registers.
-
- We could manage to locate values for all of the so called "preserved"
- registers (some of which may get saved within any particular frame) but
- that would require decoding all of the tdesc information. Tht would be
- nice information for GDB to have, but it is not strictly manditory if we
- can live without the ability to look at values within (or backup to)
- previous frames.
-*/
-
-#define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \
- frame_find_saved_regs (frame_info, &frame_saved_regs)
-
-\f
-/* There is not currently a functioning way to call functions in the
- inferior. */
-
-/* But if there was this is where we'd put the call dummy. */
-/* #define CALL_DUMMY_LOCATION AFTER_TEXT_END */
-
-/* When popping a frame on the 88k (say when doing a return command), the
- calling function only expects to have the "preserved" registers restored.
- Thus, those are the only ones that we even try to restore here. */
-
-extern void pop_frame ();
-
-#define POP_FRAME pop_frame ()
-
-/* BCS is a standard for binary compatibility. This machine uses it. */
-#if !defined (BCS)
-#define BCS 1
-#endif
-
-#define DELTA88
projects / deliverable / binutils-gdb.git / blobdiff