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/* Parameters for execution on a Fujitsu FR30 processor.
Copyright 1999, 2000 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., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include "regcache.h"
#define FR30_GENREGS 16
#define FR30_DEDICATEDREGS 8
#define FR30_REGSIZE 4 /* bytes */
#define NUM_REGS (FR30_GENREGS + FR30_DEDICATEDREGS)
#define REGISTER_BYTES ((FR30_GENREGS + FR30_DEDICATEDREGS)*FR30_REGSIZE)
/* Index within `registers' of the first byte of the space for
register N. */
#define REGISTER_BYTE(N) ((N) * FR30_REGSIZE)
/* 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", \
"pc", "ps", "tbr", "rp", "ssp", "usp", "mdh", "mdl" }
/* Offset from address of function to start of its code.
Zero on most machines. */
#define FUNCTION_START_OFFSET 0
/* 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
/* Stack grows downward. */
#define INNER_THAN(lhs,rhs) ((lhs) < (rhs))
#define R0_REGNUM 0
#define R1_REGNUM 1
#define R2_REGNUM 2
#define R3_REGNUM 3
#define R4_REGNUM 4
#define R5_REGNUM 5
#define R6_REGNUM 6
#define R7_REGNUM 7
#define R8_REGNUM 8
#define R9_REGNUM 9
#define R10_REGNUM 10
#define R11_REGNUM 11
#define R12_REGNUM 12
#define R13_REGNUM 13
#define FP_REGNUM 14 /* Frame pointer */
#define SP_REGNUM 15 /* Stack pointer */
#define PC_REGNUM 16 /* Program counter */
#define RP_REGNUM 19 /* Return pointer */
#define FIRST_ARGREG R4_REGNUM /* first arg (or struct ret val addr) */
#define LAST_ARGREG R7_REGNUM /* fourth (or third arg) */
#define RETVAL_REG R4_REGNUM /* return vaue */
/* 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 FR30_REGSIZE
/* Number of bytes of storage in the actual machine representation
for register N. */
#define REGISTER_RAW_SIZE(N) FR30_REGSIZE
/* Largest value REGISTER_RAW_SIZE can have. */
#define MAX_REGISTER_RAW_SIZE FR30_REGSIZE
/* Number of bytes of storage in the program's representation
for register N. */
#define REGISTER_VIRTUAL_SIZE(N) REGISTER_RAW_SIZE(N)
/* Largest value REGISTER_VIRTUAL_SIZE can have. */
#define MAX_REGISTER_VIRTUAL_SIZE FR30_REGSIZE
extern void fr30_pop_frame (void);
#define POP_FRAME fr30_pop_frame()
#define USE_GENERIC_DUMMY_FRAMES 1
#define CALL_DUMMY {0}
#define CALL_DUMMY_START_OFFSET (0)
#define CALL_DUMMY_BREAKPOINT_OFFSET (0)
#define CALL_DUMMY_LOCATION AT_ENTRY_POINT
#define FIX_CALL_DUMMY(DUMMY, START, FUNADDR, NARGS, ARGS, TYPE, GCCP)
#define CALL_DUMMY_ADDRESS() entry_point_address ()
#define PUSH_RETURN_ADDRESS(PC, SP) (write_register(RP_REGNUM, CALL_DUMMY_ADDRESS()), SP)
#define PUSH_DUMMY_FRAME generic_push_dummy_frame ()
/* Number of bytes at start of arglist that are not really args. */
#define FRAME_ARGS_SKIP 0
/* Return the GDB type object for the "standard" data type
of data in register N. */
#define REGISTER_VIRTUAL_TYPE(REG) builtin_type_int
/* 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. */
#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
memcpy (VALBUF, REGBUF + REGISTER_BYTE(RETVAL_REG) + \
(TYPE_LENGTH(TYPE) < 4 ? 4 - TYPE_LENGTH(TYPE) : 0), TYPE_LENGTH (TYPE))
/* 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) \
extract_address (REGBUF + REGISTER_BYTE (RETVAL_REG), \
REGISTER_RAW_SIZE (RETVAL_REG))
#define STORE_STRUCT_RETURN(ADDR, SP) \
{ write_register (RETVAL_REG, (ADDR)); }
#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(fi) (-1)
/* Forward decls for prototypes */
struct frame_info;
struct frame_saved_regs;
struct type;
struct value;
#define EXTRA_FRAME_INFO \
struct frame_saved_regs fsr; \
int framesize; \
int frameoffset; \
int framereg;
extern CORE_ADDR fr30_frame_chain (struct frame_info *fi);
#define FRAME_CHAIN(fi) fr30_frame_chain (fi)
extern CORE_ADDR fr30_frame_saved_pc (struct frame_info *);
#define FRAME_SAVED_PC(fi) (fr30_frame_saved_pc (fi))
#define SAVED_PC_AFTER_CALL(fi) read_register (RP_REGNUM)
extern CORE_ADDR fr30_skip_prologue (CORE_ADDR pc);
#define SKIP_PROLOGUE(pc) (fr30_skip_prologue (pc))
/* Write into appropriate registers a function return value of type
TYPE, given in virtual format. VALBUF is in the target byte order;
it's typically the VALUE_CONTENTS of some struct value, and those
are in the target's byte order. */
extern void fr30_store_return_value (struct type *type, char *valbuf);
#define STORE_RETURN_VALUE(TYPE,VALBUF) \
(fr30_store_return_value ((TYPE), (VALBUF)))
/* 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. */
#define FRAME_FIND_SAVED_REGS(fi, regaddr) regaddr = fi->fsr
/* Use INT #BREAKPOINT_INTNUM instruction for breakpoint */
#define FR30_BREAKOP 0x1f /* opcode, type D instruction */
#define BREAKPOINT_INTNUM 9 /* one of the reserved traps */
#define BREAKPOINT {FR30_BREAKOP, BREAKPOINT_INTNUM}
/* Define this for Wingdb */
#define TARGET_FR30
/* Define other aspects of the stack frame. */
/* An expression that tells us whether the function invocation represented
by FI does not have a frame on the stack associated with it. */
extern int fr30_frameless_function_invocation (struct frame_info *frame);
#define FRAMELESS_FUNCTION_INVOCATION(FI) (fr30_frameless_function_invocation (FI));
extern void fr30_init_extra_frame_info (struct frame_info *fi);
#define INIT_EXTRA_FRAME_INFO(fromleaf, fi) fr30_init_extra_frame_info (fi)
#define FRAME_CHAIN_VALID(FP, FI) generic_file_frame_chain_valid (FP, FI)
extern CORE_ADDR
fr30_push_arguments (int nargs, struct value **args, CORE_ADDR sp,
int struct_return, CORE_ADDR struct_addr);
#define PUSH_ARGUMENTS(NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR) \
(fr30_push_arguments (NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR))
#define PC_IN_CALL_DUMMY(PC, SP, FP) generic_pc_in_call_dummy (PC, SP, FP)
/* Fujitsu's ABI requires all structs to be passed using a pointer.
That is obviously not very efficient, so I am leaving the definitions
to make gdb work with GCC style struct passing, in case we decide
to go for better performance, rather than for compatibility with
Fujitsu (just change STRUCT_ALWAYS_BY_ADDR to 0) */
#define STRUCT_ALWAYS_BY_ADDR 1
#if(STRUCT_ALWAYS_BY_ADDR)
#define REG_STRUCT_HAS_ADDR(gcc_p,type) 1
#else
/* more standard GCC (optimized) */
#define REG_STRUCT_HAS_ADDR(gcc_p,type) \
((TYPE_LENGTH(type) > 4) && (TYPE_LENGTH(type) & 0x3))
#endif
/* alway return struct by value by input pointer */
#define USE_STRUCT_CONVENTION(GCC_P, TYPE) 1
/* The stack should always be aligned on a four-word boundary. */
#define STACK_ALIGN(len) (((len) + 3) & ~3)
/* I think the comment about this in value_arg_coerce is wrong; this
should be true on any system where you can rely on the prototyping
information. When this is true, value_arg_coerce will promote
floats to doubles iff the function is not prototyped. */
#define COERCE_FLOAT_TO_DOUBLE(formal, actual) (1)
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