1 /* Parameters for execution on a Hitachi Super-H machine.
2 Copyright (C) 1993 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
20 /* Contributed by Steve Chamberlain sac@cygnus.com */
22 #define GDB_TARGET_IS_SH
26 /* Define the bit, byte, and word ordering of the machine. */
28 #define TARGET_BYTE_ORDER BIG_ENDIAN
31 /* Offset from address of function to start of its code.
32 Zero on most machines. */
34 #define FUNCTION_START_OFFSET 0
36 /* Advance PC across any function entry prologue instructions
37 to reach some "real" code. */
39 extern CORE_ADDR
sh_skip_prologue ();
40 #define SKIP_PROLOGUE(ip) \
41 {(ip) = sh_skip_prologue(ip);}
44 /* Immediately after a function call, return the saved pc.
45 Can't always go through the frames for this because on some machines
46 the new frame is not set up until the new function executes
49 The return address is the value saved in the PR register + 4 */
51 #define SAVED_PC_AFTER_CALL(frame) \
52 (ADDR_BITS_REMOVE(read_register(PR_REGNUM))+4)
54 /* Stack grows downward. */
58 /* Illegal instruction - used by the simulator for breakpoint
61 #define BREAKPOINT {0xc3, 0xff} /* 0xc3ff is trapa #ff */
64 /* If your kernel resets the pc after the trap happens you may need to
65 define this before including this file. */
66 #define DECR_PC_AFTER_BREAK 2
68 /* Nonzero if instruction at PC is a return instruction. */
69 #define ABOUT_TO_RETURN(pc) (read_memory_integer(pc,2) == 0x000b)
71 /* Return 1 if P points to an invalid floating point value. */
73 #define INVALID_FLOAT(p, len) 0 /* Just a first guess; not checked */
75 /* Say how long (ordinary) registers are. This is a piece of bogosity
76 used in push_word and a few other places; REGISTER_RAW_SIZE is the
77 real way to know how big a register is. */
79 #define REGISTER_SIZE 4
81 /* Say how much memory is needed to store a copy of the register set */
82 #define REGISTER_BYTES (NUM_REGS*4)
84 /* Index within `registers' of the first byte of the space for
87 #define REGISTER_BYTE(N) ((N)*4)
89 /* Number of bytes of storage in the actual machine representation
92 #define REGISTER_RAW_SIZE(N) 4
94 #define REGISTER_VIRTUAL_SIZE(N) 4
96 /* Largest value REGISTER_RAW_SIZE can have. */
98 #define MAX_REGISTER_RAW_SIZE 4
100 /* Largest value REGISTER_VIRTUAL_SIZE can have. */
102 #define MAX_REGISTER_VIRTUAL_SIZE 4
104 /* Return the GDB type object for the "standard" data type
105 of data in register N. */
107 #define REGISTER_VIRTUAL_TYPE(N) builtin_type_int
109 /* Initializer for an array of names of registers.
110 Entries beyond the first NUM_REGS are ignored. */
112 #define REGISTER_NAMES \
113 {"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \
114 "r8", "r9", "r10","r11","r12","r13","r14","r15",\
115 "pc", "pr","gbr","vbr","mach","macl","sr","ticks","stalls","cycles","insts" ,"plr","tlr" }
119 /* Register numbers of various important registers.
120 Note that some of these values are "real" register numbers,
121 and correspond to the general registers of the machine,
122 and some are "phony" register numbers which are too large
123 to be actual register numbers as far as the user is concerned
124 but do serve to get the desired values when passed to read_register. */
130 #define GBR_REGNUM 18
131 #define VBR_REGNUM 19
132 #define MACH_REGNUM 20
133 #define MACL_REGNUM 21
135 #define NUM_REALREGS 23
136 /* Store the address of the place in which to copy the structure the
137 subroutine will return. This is called from call_function.
139 We store structs through a pointer passed in R4 */
141 #define STORE_STRUCT_RETURN(ADDR, SP) \
142 { write_register (4, (ADDR)); }
144 /* Extract from an array REGBUF containing the (raw) register state
145 a function return value of type TYPE, and copy that, in virtual format,
148 #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
149 memcpy (VALBUF, (char *)(REGBUF), TYPE_LENGTH(TYPE))
152 /* Write into appropriate registers a function return value
153 of type TYPE, given in virtual format.
155 Things always get returned in R4/R5 */
157 #define STORE_RETURN_VALUE(TYPE,VALBUF) \
158 write_register_bytes (REGISTER_BYTE(4), VALBUF, TYPE_LENGTH (TYPE))
161 /* Extract from an array REGBUF containing the (raw) register state
162 the address in which a function should return its structure value,
163 as a CORE_ADDR (or an expression that can be used as one). */
165 #define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) (*(CORE_ADDR *)(REGBUF))
168 /* Define other aspects of the stack frame.
169 we keep a copy of the worked out return pc lying around, since it
170 is a useful bit of info */
172 #define EXTRA_FRAME_INFO \
175 #define INIT_EXTRA_FRAME_INFO(fromleaf, fi) \
176 init_extra_frame_info(fromleaf, fi)
178 /* A macro that tells us whether the function invocation represented
179 by FI does not have a frame on the stack associated with it. If it
180 does not, FRAMELESS is set to 1, else 0. */
182 #define FRAMELESS_FUNCTION_INVOCATION(FI, FRAMELESS) \
183 (FRAMELESS) = frameless_look_for_prologue(FI)
185 #define FRAME_CHAIN(FRAME) sh_frame_chain(FRAME)
186 #define FRAME_SAVED_PC(FRAME) ((FRAME)->return_pc)
187 #define FRAME_ARGS_ADDRESS(fi) (fi)->frame
188 #define FRAME_LOCALS_ADDRESS(fi) (fi)->frame
190 /* Set VAL to the number of args passed to frame described by FI.
191 Can set VAL to -1, meaning no way to tell. */
193 /* We can't tell how many args there are */
195 #define FRAME_NUM_ARGS(val,fi) (val = -1)
197 /* Return number of bytes at start of arglist that are not really args. */
199 #define FRAME_ARGS_SKIP 0
201 /* Put here the code to store, into a struct frame_saved_regs,
202 the addresses of the saved registers of frame described by FRAME_INFO.
203 This includes special registers such as pc and fp saved in special
204 ways in the stack frame. sp is even more special:
205 the address we return for it IS the sp for the next frame. */
207 #define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \
208 frame_find_saved_regs(frame_info, &(frame_saved_regs))
210 #define NAMES_HAVE_UNDERSCORE
212 typedef unsigned short INSN_WORD
;
214 #define ADDR_BITS_REMOVE(addr) ((addr))
216 #define CALL_DUMMY_LENGTH 10
218 /* Discard from the stack the innermost frame,
219 restoring all saved registers. */
221 #define POP_FRAME pop_frame();
224 #define NOP {0x20, 0x0b}
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