8db62801bd
* config/sh/tm-sh.h (STORE_RETURN_VALUE): Redefine as
sh_store_return_value().
* sh-tdep.c (sh_store_return_value): New function. Store the
value returned by a function into the appropriate register.
2000-07-10 Elena Zannoni <ezannoni@kwikemart.cygnus.com>
* sh-tdep.c (sh_skip_prologue): Before looking at the actual
instructions, try to see if the symbol table can be of help, by
calling after_prologue(). If this doesn't work, call
skip_prologue_hard_way().
(skip_prologue_hard_way): Renamed from sh_skip_prologue. Add some
more instruction pattern matching for pushing of arguments, and
manipulation of r14.
(after_prologue): New function. Use symbol table info to determine
the end of the prologue, if possible.
293 lines
9.4 KiB
C
293 lines
9.4 KiB
C
/* Target-specific definition for a Hitachi Super-H.
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Copyright (C) 1993 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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/* Contributed by Steve Chamberlain sac@cygnus.com */
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struct frame_info;
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struct frame_saved_regs;
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struct value;
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struct type;
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#define GDB_TARGET_IS_SH
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#define IEEE_FLOAT (1)
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/* Define the bit, byte, and word ordering of the machine. */
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#define TARGET_BYTE_ORDER_SELECTABLE
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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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/* Advance PC across any function entry prologue instructions
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to reach some "real" code. */
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extern CORE_ADDR sh_skip_prologue (CORE_ADDR);
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#define SKIP_PROLOGUE(ip) (sh_skip_prologue (ip))
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/* Immediately after a function call, return the saved pc.
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Can't always go through the frames for this because on some machines
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the new frame is not set up until the new function executes
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some instructions.
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The return address is the value saved in the PR register + 4 */
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#define SAVED_PC_AFTER_CALL(frame) (ADDR_BITS_REMOVE(read_register(PR_REGNUM)))
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/* Stack grows downward. */
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#define INNER_THAN(lhs,rhs) ((lhs) < (rhs))
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/* Illegal instruction - used by the simulator for breakpoint
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detection */
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#define BREAKPOINT {0xc3, 0xc3} /* 0xc3c3 is trapa #c3, and it works in big
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and little endian modes */
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#define BIG_REMOTE_BREAKPOINT { 0xc3, 0x20 }
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#define LITTLE_REMOTE_BREAKPOINT { 0x20, 0xc3 }
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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 0
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/* Say how long registers are. */
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#define REGISTER_TYPE long
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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*4)
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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)*4)
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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) 4
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#define REGISTER_VIRTUAL_SIZE(N) 4
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/* Largest value REGISTER_RAW_SIZE can have. */
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#define MAX_REGISTER_RAW_SIZE 4
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/* Largest value REGISTER_VIRTUAL_SIZE can have. */
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#define MAX_REGISTER_VIRTUAL_SIZE 4
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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) >= FP0_REGNUM && (N) <= FP15_REGNUM) \
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|| (N) == FPUL_REGNUM) \
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&& TARGET_ARCHITECTURE->mach != bfd_mach_sh_dsp \
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&& TARGET_ARCHITECTURE->mach != bfd_mach_sh3_dsp) \
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? builtin_type_float : builtin_type_int)
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/* Initializer for an array of names of registers.
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Entries beyond the first NUM_REGS are ignored. */
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extern char **sh_register_names;
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#define REGISTER_NAME(i) sh_register_names[i]
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#define NUM_REGS 59
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/* Register numbers of various important registers. Note that some of
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these values are "real" register numbers, and correspond to the
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general registers of the machine, and some are "phony" register
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numbers which are too large to be actual register numbers as far as
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the user is concerned but do serve to get the desired values when
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passed to read_register. */
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#define R0_REGNUM 0
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#define STRUCT_RETURN_REGNUM 2
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#define ARG0_REGNUM 4
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#define ARGLAST_REGNUM 7
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#define FP_REGNUM 14
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#define SP_REGNUM 15
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#define PC_REGNUM 16
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#define PR_REGNUM 17
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#define GBR_REGNUM 18
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#define VBR_REGNUM 19
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#define MACH_REGNUM 20
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#define MACL_REGNUM 21
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#define SR_REGNUM 22
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#define FPUL_REGNUM 23
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#define FPSCR_REGNUM 24
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#define DSR_REGNUM 24
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#define FP0_REGNUM 25
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#define FP15_REGNUM 40
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#define A0G_REGNUM 25
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#define A0_REGNUM 26
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#define A1G_REGNUM 27
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#define A1_REGNUM 28
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#define M0_REGNUM 29
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#define M1_REGNUM 30
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#define X0_REGNUM 31
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#define X1_REGNUM 32
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#define Y0_REGNUM 33
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#define Y1_REGNUM 34
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#define MOD_REGNUM 40
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#define SSR_REGNUM 41
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#define SPC_REGNUM 42
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#define R0B0_REGNUM 43
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#define R0B1_REGNUM 51
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#define RS_REGNUM 43
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#define RE_REGNUM 44
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#define R0B_REGNUM 51
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#define NUM_REALREGS 59
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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 R0 */
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#define STORE_STRUCT_RETURN(ADDR, SP) \
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{ write_register (STRUCT_RETURN_REGNUM, (ADDR)); }
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extern use_struct_convention_fn sh_use_struct_convention;
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#define USE_STRUCT_CONVENTION(gcc_p, type) sh_use_struct_convention (gcc_p, type)
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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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extern void sh_extract_return_value (struct type *, void *, void *);
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#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
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sh_extract_return_value (TYPE, REGBUF, VALBUF)
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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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extern void sh_store_return_value (struct type *, void *);
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#define STORE_RETURN_VALUE(TYPE,VALBUF) \
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sh_store_return_value (TYPE, VALBUF)
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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_RAW_SIZE (0))
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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 leaf_function; \
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int f_offset;
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#define INIT_EXTRA_FRAME_INFO(fromleaf, fi) \
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sh_init_extra_frame_info(fromleaf, fi)
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extern void sh_init_extra_frame_info (int, struct frame_info *);
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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) \
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(frameless_look_for_prologue(FI))
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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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/* 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(fi) (-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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extern void sh_frame_find_saved_regs (struct frame_info *fi,
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struct frame_saved_regs *fsr);
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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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sh_frame_find_saved_regs(frame_info, &(frame_saved_regs))
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typedef unsigned short INSN_WORD;
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extern CORE_ADDR sh_push_arguments (int nargs,
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struct value **args,
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CORE_ADDR sp,
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unsigned char struct_return,
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CORE_ADDR struct_addr);
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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_LENGTH (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 FIX_CALL_DUMMY(DUMMY, STARTADDR, FUNADDR, NARGS, ARGS, TYPE, GCCP)
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#define CALL_DUMMY_LOCATION AT_ENTRY_POINT
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#define CALL_DUMMY_ADDRESS() entry_point_address ()
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extern CORE_ADDR sh_push_return_address (CORE_ADDR, CORE_ADDR);
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#define PUSH_RETURN_ADDRESS(PC, SP) sh_push_return_address (PC, SP)
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extern CORE_ADDR sh_frame_chain (struct frame_info *);
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#define FRAME_CHAIN(FRAME) sh_frame_chain(FRAME)
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#define PUSH_DUMMY_FRAME generic_push_dummy_frame ()
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#define FRAME_CHAIN_VALID(FP, FRAME) generic_file_frame_chain_valid (FP, FRAME)
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#define PC_IN_CALL_DUMMY(PC, SP, FP) generic_pc_in_call_dummy (PC, SP, FP)
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#define PUSH_ARGUMENTS(NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR) \
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(sh_push_arguments (NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR))
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/* override the standard get_saved_register function with
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one that takes account of generic CALL_DUMMY frames */
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#define GET_SAVED_REGISTER(raw_buffer, optimized, addrp, frame, regnum, lval) \
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generic_get_saved_register (raw_buffer, optimized, addrp, frame, regnum, lval)
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/* Discard from the stack the innermost frame, restoring all saved
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registers. */
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extern void sh_pop_frame (void);
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#define POP_FRAME sh_pop_frame();
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#define NOP {0x20, 0x0b}
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#define REGISTER_SIZE 4
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#define COERCE_FLOAT_TO_DOUBLE(formal, actual) (1)
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#define BELIEVE_PCC_PROMOTION 1
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/* Need this for WinGDB. See gdb/mswin/{regdoc.h, gdbwin.c, gui.cpp}. */
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#define TARGET_SH
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