239 lines
8.6 KiB
C
239 lines
8.6 KiB
C
/* Parameters for execution on a Fujitsu FR30 processor.
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Copyright 1999, 2000 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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#include "regcache.h"
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#define FR30_GENREGS 16
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#define FR30_DEDICATEDREGS 8
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#define FR30_REGSIZE 4 /* bytes */
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#define NUM_REGS (FR30_GENREGS + FR30_DEDICATEDREGS)
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#define REGISTER_BYTES ((FR30_GENREGS + FR30_DEDICATEDREGS)*FR30_REGSIZE)
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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) * FR30_REGSIZE)
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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 \
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{ "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", \
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"r9", "r10", "r11", "r12", "r13", "r14", "r15", \
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"pc", "ps", "tbr", "rp", "ssp", "usp", "mdh", "mdl" }
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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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/* 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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/* Stack grows downward. */
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#define INNER_THAN(lhs,rhs) ((lhs) < (rhs))
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#define TARGET_BYTE_ORDER BIG_ENDIAN
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#define R0_REGNUM 0
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#define R1_REGNUM 1
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#define R2_REGNUM 2
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#define R3_REGNUM 3
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#define R4_REGNUM 4
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#define R5_REGNUM 5
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#define R6_REGNUM 6
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#define R7_REGNUM 7
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#define R8_REGNUM 8
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#define R9_REGNUM 9
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#define R10_REGNUM 10
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#define R11_REGNUM 11
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#define R12_REGNUM 12
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#define R13_REGNUM 13
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#define FP_REGNUM 14 /* Frame pointer */
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#define SP_REGNUM 15 /* Stack pointer */
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#define PC_REGNUM 16 /* Program counter */
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#define RP_REGNUM 19 /* Return pointer */
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#define FIRST_ARGREG R4_REGNUM /* first arg (or struct ret val addr) */
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#define LAST_ARGREG R7_REGNUM /* fourth (or third arg) */
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#define RETVAL_REG R4_REGNUM /* return vaue */
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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 FR30_REGSIZE
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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) FR30_REGSIZE
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/* Largest value REGISTER_RAW_SIZE can have. */
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#define MAX_REGISTER_RAW_SIZE FR30_REGSIZE
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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) REGISTER_RAW_SIZE(N)
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/* Largest value REGISTER_VIRTUAL_SIZE can have. */
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#define MAX_REGISTER_VIRTUAL_SIZE FR30_REGSIZE
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extern void fr30_pop_frame (void);
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#define POP_FRAME fr30_pop_frame()
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#define USE_GENERIC_DUMMY_FRAMES 1
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#define CALL_DUMMY {0}
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#define CALL_DUMMY_START_OFFSET (0)
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#define CALL_DUMMY_BREAKPOINT_OFFSET (0)
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#define CALL_DUMMY_LOCATION AT_ENTRY_POINT
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#define FIX_CALL_DUMMY(DUMMY, START, FUNADDR, NARGS, ARGS, TYPE, GCCP)
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#define CALL_DUMMY_ADDRESS() entry_point_address ()
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#define PUSH_RETURN_ADDRESS(PC, SP) (write_register(RP_REGNUM, CALL_DUMMY_ADDRESS()), SP)
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#define PUSH_DUMMY_FRAME generic_push_dummy_frame ()
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/* 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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/* 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(REG) builtin_type_int
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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 + REGISTER_BYTE(RETVAL_REG) + \
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(TYPE_LENGTH(TYPE) < 4 ? 4 - TYPE_LENGTH(TYPE) : 0), 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) \
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extract_address (REGBUF + REGISTER_BYTE (RETVAL_REG), \
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REGISTER_RAW_SIZE (RETVAL_REG))
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#define STORE_STRUCT_RETURN(ADDR, SP) \
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{ write_register (RETVAL_REG, (ADDR)); }
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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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#define FRAME_NUM_ARGS(fi) (-1)
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/* 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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#define EXTRA_FRAME_INFO \
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struct frame_saved_regs fsr; \
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int framesize; \
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int frameoffset; \
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int framereg;
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extern CORE_ADDR fr30_frame_chain (struct frame_info *fi);
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#define FRAME_CHAIN(fi) fr30_frame_chain (fi)
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extern CORE_ADDR fr30_frame_saved_pc (struct frame_info *);
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#define FRAME_SAVED_PC(fi) (fr30_frame_saved_pc (fi))
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#define SAVED_PC_AFTER_CALL(fi) read_register (RP_REGNUM)
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extern CORE_ADDR fr30_skip_prologue (CORE_ADDR pc);
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#define SKIP_PROLOGUE(pc) (fr30_skip_prologue (pc))
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/* Write into appropriate registers a function return value of type
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TYPE, given in virtual format. VALBUF is in the target byte order;
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it's typically the VALUE_CONTENTS of some struct value, and those
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are in the target's byte order. */
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extern void fr30_store_return_value (struct type *type, char *valbuf);
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#define STORE_RETURN_VALUE(TYPE,VALBUF) \
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(fr30_store_return_value ((TYPE), (VALBUF)))
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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(fi, regaddr) regaddr = fi->fsr
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/* Use INT #BREAKPOINT_INTNUM instruction for breakpoint */
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#define FR30_BREAKOP 0x1f /* opcode, type D instruction */
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#define BREAKPOINT_INTNUM 9 /* one of the reserved traps */
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#define BREAKPOINT {FR30_BREAKOP, BREAKPOINT_INTNUM}
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/* Define this for Wingdb */
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#define TARGET_FR30
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/* IEEE format floating point */
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#define IEEE_FLOAT (1)
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/* Define other aspects of the stack frame. */
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/* An expression 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. */
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extern int fr30_frameless_function_invocation (struct frame_info *frame);
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#define FRAMELESS_FUNCTION_INVOCATION(FI) (fr30_frameless_function_invocation (FI));
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extern void fr30_init_extra_frame_info (struct frame_info *fi);
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#define INIT_EXTRA_FRAME_INFO(fromleaf, fi) fr30_init_extra_frame_info (fi)
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#define FRAME_CHAIN_VALID(FP, FI) generic_file_frame_chain_valid (FP, FI)
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extern CORE_ADDR
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fr30_push_arguments (int nargs, struct value **args, CORE_ADDR sp,
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int struct_return, CORE_ADDR struct_addr);
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#define PUSH_ARGUMENTS(NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR) \
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(fr30_push_arguments (NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR))
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#define PC_IN_CALL_DUMMY(PC, SP, FP) generic_pc_in_call_dummy (PC, SP, FP)
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/* Fujitsu's ABI requires all structs to be passed using a pointer.
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That is obviously not very efficient, so I am leaving the definitions
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to make gdb work with GCC style struct passing, in case we decide
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to go for better performance, rather than for compatibility with
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Fujitsu (just change STRUCT_ALWAYS_BY_ADDR to 0) */
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#define STRUCT_ALWAYS_BY_ADDR 1
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#if(STRUCT_ALWAYS_BY_ADDR)
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#define REG_STRUCT_HAS_ADDR(gcc_p,type) 1
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#else
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/* more standard GCC (optimized) */
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#define REG_STRUCT_HAS_ADDR(gcc_p,type) \
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((TYPE_LENGTH(type) > 4) && (TYPE_LENGTH(type) & 0x3))
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#endif
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/* alway return struct by value by input pointer */
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#define USE_STRUCT_CONVENTION(GCC_P, TYPE) 1
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/* The stack should always be aligned on a four-word boundary. */
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#define STACK_ALIGN(len) (((len) + 3) & ~3)
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/* I think the comment about this in value_arg_coerce is wrong; this
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should be true on any system where you can rely on the prototyping
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information. When this is true, value_arg_coerce will promote
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floats to doubles iff the function is not prototyped. */
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#define COERCE_FLOAT_TO_DOUBLE(formal, actual) (1)
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