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69992fc816
* sh-tdep.c: Add functionality for target function calls.
* config/sh/tm-sh.h: Add support for target function calls.
This is a safety check-in: everything works, and there'll be another
clean-up round shortly.
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, Boston, MA 02111-1307, USA. */
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/* Contributed by Steve Chamberlain sac@cygnus.com */
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#ifdef __STDC__
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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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#endif
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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 ();
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#define SKIP_PROLOGUE(ip) \
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{(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) \
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(ADDR_BITS_REMOVE(read_register(PR_REGNUM)))
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/* Stack grows downward. */
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#define INNER_THAN <
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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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/* Nonzero if instruction at PC is a return instruction. */
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#define ABOUT_TO_RETURN(pc) (read_memory_integer(pc,2) == 0x000b)
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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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? 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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#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", "r15", \
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"pc", "pr", "gbr", "vbr", "mach", "macl", "sr", \
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"fpul", "fpscr", \
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"fr0", "fr1", "fr2", "fr3", "fr4", "fr5", "fr6", "fr7", \
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"fr8", "fr9", "fr10", "fr11", "fr12", "fr13", "fr14", "fr15", \
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"ssr", "spc", \
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"r0b0", "r1b0", "r2b0", "r3b0", "r4b0", "r5b0", "r6b0", "r7b0", \
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"r0b1", "r1b1", "r2b1", "r3b1", "r4b1", "r5b1", "r6b1", "r7b1", \
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}
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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 FP0_REGNUM 25
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#define FP15_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 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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#define USE_STRUCT_CONVENTION(gcc_p, type) (TYPE_LENGTH(type) > 1)
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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 PARAMS ((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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Things always get returned in R0/R1 */
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#define STORE_RETURN_VALUE(TYPE,VALBUF) \
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write_register_bytes (REGISTER_BYTE(0), 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 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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/* 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_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(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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extern void sh_frame_find_saved_regs PARAMS ((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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#define NAMES_HAVE_UNDERSCORE
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typedef unsigned short INSN_WORD;
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extern CORE_ADDR generic_read_register_dummy PARAMS ((struct frame_info *,
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int regno));
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extern void generic_push_dummy_frame PARAMS ((void));
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extern void generic_pop_dummy_frame PARAMS ((void));
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extern int generic_pc_in_call_dummy PARAMS ((CORE_ADDR pc,
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CORE_ADDR fp,
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CORE_ADDR sp));
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extern char * generic_find_dummy_frame PARAMS ((CORE_ADDR pc,
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CORE_ADDR fp,
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CORE_ADDR sp));
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extern void sh_push_return_address PARAMS ((CORE_ADDR));
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extern CORE_ADDR sh_push_arguments PARAMS ((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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extern int generic_frame_chain_valid PARAMS((CORE_ADDR, struct frame_info *));
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#define CALL_DUMMY { }
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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 CALL_DUMMY_LOCATION AT_ENTRY_POINT
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#define CALL_DUMMY_ADDRESS() (entry_point_address ())
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#define PUSH_RETURN_ADDRESS(PC) (sh_push_return_address (PC))
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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_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 FIX_CALL_DUMMY(DUMMYNAME, STARTADDR, FUNADDR, NARGS, ARGS, TYPE, GCCP)
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#define PUSH_ARGUMENTS(NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR) \
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(SP) = sh_push_arguments (NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR)
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/* Discard from the stack the innermost frame, restoring all saved
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registers. */
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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 1
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