61e5b759cd
* tm-d10v.h: Major fixes to support inferior function calls and proper stack backtracing on D10V-EVA board.
280 lines
9.3 KiB
C
280 lines
9.3 KiB
C
/* Target-specific definition for the Mitsubishi D10V
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Copyright (C) 1996 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, Boston, MA 02111-1307, USA. */
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/* Contributed by Martin Hunt, hunt@cygnus.com */
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#define GDB_TARGET_IS_D10V
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/* Define the bit, byte, and word ordering of the machine. */
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#define TARGET_BYTE_ORDER BIG_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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/* these are the addresses the D10V-EVA board maps data */
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/* and instruction memory to. */
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#define DMEM_START 0x2000000
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#define IMEM_START 0x1000000
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#define STACK_START 0x2007ffe
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#ifdef __STDC__ /* Forward decls for prototypes */
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struct frame_info;
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struct frame_saved_regs;
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struct type;
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struct value;
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#endif
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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 d10v_skip_prologue ();
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#define SKIP_PROLOGUE(ip) \
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{(ip) = d10v_skip_prologue(ip);}
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/* Stack grows downward. */
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#define INNER_THAN <
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/* for a breakpoint, use "dbt || nop" */
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#define BREAKPOINT {0x2f, 0x90, 0x5e, 0x00}
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/* If your kernel resets the pc after the trap happens you may need to
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define this before including this file. */
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#define DECR_PC_AFTER_BREAK 4
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#define REGISTER_NAMES \
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{ "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \
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"r8", "r9", "r10","r11","r12", "r13", "r14","sp",\
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"psw","bpsw","pc","bpc", "cr4", "cr5", "cr6", "rpt_c",\
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"rpt_s","rpt_e", "mod_s", "mod_e", "cr12", "cr13", "iba", "cr15",\
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"imap0","imap1","dmap","a0", "a1"\
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}
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#define NUM_REGS 37
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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 R0_REGNUM 0
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#define LR_REGNUM 13
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#define SP_REGNUM 15
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#define FP_REGNUM 11
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#define PC_REGNUM 18
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#define PSW_REGNUM 16
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#define IMAP0_REGNUM 32
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#define IMAP1_REGNUM 33
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#define DMAP_REGNUM 34
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#define A0_REGNUM 35
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/* Say how much memory is needed to store a copy of the register set */
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#define REGISTER_BYTES ((NUM_REGS-2)*2+16)
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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) \
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( ((N) > A0_REGNUM) ? ( ((N)-A0_REGNUM)*8 + A0_REGNUM*2 ) : ((N) * 2) )
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/* Number of bytes of storage in the actual machine representation
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for register N. */
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#define REGISTER_RAW_SIZE(N) ( ((N) >= A0_REGNUM) ? 8 : 2 )
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/* Number of bytes of storage in the program's representation
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for register N. */
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#define REGISTER_VIRTUAL_SIZE(N) ( ((N) >= A0_REGNUM) ? 8 : 2 )
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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) < A0_REGNUM ) ? builtin_type_short : builtin_type_long_long)
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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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We store structs through a pointer passed in R2 */
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#define STORE_STRUCT_RETURN(ADDR, SP) \
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{ write_register (2, (ADDR)); }
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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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Things always get returned in R2/R3 */
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#define STORE_RETURN_VALUE(TYPE,VALBUF) \
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write_register_bytes (REGISTER_BYTE(2), 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) (*(CORE_ADDR *)(REGBUF))
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/* Define other aspects of the stack frame.
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we keep a copy of the worked out return pc lying around, since it
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is a useful bit of info */
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#define EXTRA_FRAME_INFO \
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CORE_ADDR return_pc; \
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int dummy; \
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int frameless; \
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int size;
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#define INIT_EXTRA_FRAME_INFO(fromleaf, fi) \
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d10v_init_extra_frame_info(fromleaf, fi)
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extern void d10v_init_extra_frame_info PARAMS (( int fromleaf, struct frame_info *fi ));
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/* A macro that tells us whether the function invocation represented
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by FI does not have a frame on the stack associated with it. If it
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does not, FRAMELESS is set to 1, else 0. */
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#define FRAMELESS_FUNCTION_INVOCATION(FI, FRAMELESS) \
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(FRAMELESS) = frameless_look_for_prologue(FI)
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#define FRAME_CHAIN(FRAME) d10v_frame_chain(FRAME)
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#define FRAME_CHAIN_VALID(chain,frame) \
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((chain) != 0 && (frame) != 0 && (frame)->pc > IMEM_START)
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#define FRAME_SAVED_PC(FRAME) ((FRAME)->return_pc)
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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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/* Immediately after a function call, return the saved pc. We can't */
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/* use frame->return_pc beause that is determined by reading R13 off the */
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/*stack and that may not be written yet. */
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#define SAVED_PC_AFTER_CALL(frame) ((read_register(LR_REGNUM) << 2) | IMEM_START)
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/* Set VAL to the number of args passed to frame described by FI.
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Can set VAL to -1, meaning no way to tell. */
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/* We can't tell how many args there are */
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#define FRAME_NUM_ARGS(val,fi) (val = -1)
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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 0
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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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d10v_frame_find_saved_regs(frame_info, &(frame_saved_regs))
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extern void d10v_frame_find_saved_regs PARAMS ((struct frame_info *, struct frame_saved_regs *));
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#define NAMES_HAVE_UNDERSCORE
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/*
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DUMMY FRAMES. Need these to support inferior function calls. They work
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like this on D10V: First we set a breakpoint at 0 or __start. Then we push
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all the registers onto the stack. Then put the function arguments in the proper
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registers and set r13 to our breakpoint address. Finally call the function directly.
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When it hits the breakpoint, clear the break point and pop the old register contents
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off the stack.
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*/
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#define CALL_DUMMY { }
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#define PUSH_DUMMY_FRAME
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#define CALL_DUMMY_START_OFFSET 0
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#define CALL_DUMMY_LOCATION AT_ENTRY_POINT
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#define CALL_DUMMY_BREAKPOINT_OFFSET (0)
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extern CORE_ADDR d10v_call_dummy_address PARAMS ((void));
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#define CALL_DUMMY_ADDRESS() d10v_call_dummy_address()
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#define FIX_CALL_DUMMY(dummyname, pc, fun, nargs, args, type, gcc_p) \
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sp = d10v_fix_call_dummy (dummyname, pc, fun, nargs, args, type, gcc_p)
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#define PC_IN_CALL_DUMMY(pc, sp, frame_address) ( pc == IMEM_START + 4 )
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extern CORE_ADDR d10v_fix_call_dummy PARAMS ((char *, CORE_ADDR, CORE_ADDR,
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int, struct value **,
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struct type *, int));
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#define PUSH_ARGUMENTS(nargs, args, sp, struct_return, struct_addr) \
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sp = d10v_push_arguments((nargs), (args), (sp), (struct_return), (struct_addr))
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extern CORE_ADDR d10v_push_arguments PARAMS ((int, struct value **, CORE_ADDR, int, CORE_ADDR));
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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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d10v_extract_return_value(TYPE, REGBUF, VALBUF)
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extern void
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d10v_extract_return_value PARAMS ((struct type *, char *, char *));
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/* Discard from the stack the innermost frame,
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restoring all saved registers. */
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#define POP_FRAME d10v_pop_frame();
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extern void d10v_pop_frame PARAMS((void));
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#define REGISTER_SIZE 2
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#ifdef CC_HAS_LONG_LONG
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# define LONGEST long long
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#else
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# define LONGEST long
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#endif
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void d10v_write_pc PARAMS ((CORE_ADDR val, int pid));
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CORE_ADDR d10v_read_pc PARAMS ((int pid));
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void d10v_write_sp PARAMS ((CORE_ADDR val));
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CORE_ADDR d10v_read_sp PARAMS ((void));
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#define TARGET_READ_PC(pid) d10v_read_pc (pid)
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#define TARGET_WRITE_PC(val,pid) d10v_write_pc (val, pid)
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#define TARGET_READ_FP() d10v_read_sp ()
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#define TARGET_WRITE_FP(val) d10v_write_sp (val)
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#define TARGET_READ_SP() d10v_read_sp ()
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#define TARGET_WRITE_SP(val) d10v_write_sp (val)
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/* Number of bits in the appropriate type */
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#define TARGET_INT_BIT (2 * TARGET_CHAR_BIT)
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#define TARGET_PTR_BIT (2 * TARGET_CHAR_BIT)
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#define TARGET_DOUBLE_BIT (4 * TARGET_CHAR_BIT)
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#define TARGET_LONG_DOUBLE_BIT (8 * TARGET_CHAR_BIT)
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