1 /* Parameters for execution on a Motorola MCore.
2 Copyright (C) 1995 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., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
21 /* The mcore is little endian (by default) */
22 #define TARGET_BYTE_ORDER_DEFAULT LITTLE_ENDIAN
24 /* All registers are 32 bits */
25 #define REGISTER_SIZE 4
26 #define MAX_REGISTER_RAW_SIZE 4
28 #define REGISTER_VIRTUAL_TYPE(REG) builtin_type_int
30 #define REGISTER_BYTE(REG) ((REG) * REGISTER_SIZE)
31 #define REGISTER_VIRTUAL_SIZE(REG) 4
32 #define REGISTER_RAW_SIZE(REG) 4
34 #define MAX_REGISTER_VIRTUAL_SIZE 4
36 #define REGISTER_BYTES (NUM_REGS * REGISTER_SIZE)
38 extern char *mcore_register_names
[];
39 #define REGISTER_NAME(I) mcore_register_names[I]
41 /* Registers. The Motorola MCore contains:
43 16 32-bit general purpose registers (r0-r15)
44 16 32-bit alternate file registers (ar0-ar15)
45 32 32-bit control registers (cr0-cr31)
52 #define FP_REGNUM (SP_REGNUM)
54 #define FIRST_ARGREG 2
56 #define RETVAL_REGNUM 2
58 /* Offset from address of function to start of its code.
59 Zero on most machines. */
60 #define FUNCTION_START_OFFSET 0
62 #define DECR_PC_AFTER_BREAK 0
64 /* BREAKPOINT_FROM_PC uses the program counter value to determine
65 the breakpoint that should be used. */
66 extern breakpoint_from_pc_fn mcore_breakpoint_from_pc
;
67 #define BREAKPOINT_FROM_PC(PCPTR, LENPTR) mcore_breakpoint_from_pc (PCPTR, LENPTR)
69 #define INNER_THAN(LHS,RHS) ((LHS) < (RHS))
71 #define SAVED_PC_AFTER_CALL(FRAME) read_register (PR_REGNUM)
77 extern void mcore_init_extra_frame_info (struct frame_info
*fi
);
78 #define INIT_EXTRA_FRAME_INFO(FROMLEAF, FI) mcore_init_extra_frame_info ((FI))
79 #define INIT_FRAME_PC /* Not necessary */
80 #define FRAME_INIT_SAVED_REGS(FI) /* handled by init_extra_frame_info */
82 extern CORE_ADDR
mcore_frame_chain (struct frame_info
*fi
);
83 #define FRAME_CHAIN(FI) mcore_frame_chain ((FI))
84 #define FRAME_CHAIN_VALID(FP, FI) generic_file_frame_chain_valid ((FP), (FI))
86 extern CORE_ADDR
mcore_frame_saved_pc (struct frame_info
*);
87 #define FRAME_SAVED_PC(FI) (mcore_frame_saved_pc ((FI)))
89 /* Extracting/storing return values. */
90 extern void mcore_store_return_value (struct type
*type
, char *valbuf
);
91 #define STORE_RETURN_VALUE(TYPE, VALBUF) mcore_store_return_value ((TYPE), (VALBUF))
93 extern void mcore_extract_return_value (struct type
*type
, char *regbut
, char *valbuf
);
94 #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
95 mcore_extract_return_value ((TYPE), (REGBUF), (VALBUF));
97 #define STORE_STRUCT_RETURN(ADDR, SP) /* handled by mcore_push_arguments */
99 extern CORE_ADDR
mcore_extract_struct_value_address (char *regbuf
);
100 #define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) \
101 mcore_extract_struct_value_address (REGBUF)
103 extern CORE_ADDR
mcore_skip_prologue (CORE_ADDR pc
);
104 #define SKIP_PROLOGUE(PC) (PC) = mcore_skip_prologue ((PC))
106 #define FRAME_ARGS_SKIP 0
107 extern CORE_ADDR
mcore_frame_args_address (struct frame_info
*fi
);
108 #define FRAME_ARGS_ADDRESS(FI) mcore_frame_args_address ((FI))
109 extern CORE_ADDR
mcore_frame_locals_address (struct frame_info
*fi
);
110 #define FRAME_LOCALS_ADDRESS(FI) mcore_frame_locals_address ((FI))
111 #define FRAME_NUM_ARGS(FI) (-1)
114 extern void mcore_pop_frame (struct frame_info
*fi
);
115 #define POP_FRAME mcore_pop_frame (get_current_frame ())
117 #define USE_GENERIC_DUMMY_FRAMES 1
118 #define CALL_DUMMY {0}
119 #define CALL_DUMMY_START_OFFSET (0)
120 #define CALL_DUMMY_BREAKPOINT_OFFSET (0)
121 #define CALL_DUMMY_LOCATION AT_ENTRY_POINT
122 #define FIX_CALL_DUMMY(DUMMY, START, FUNADDR, NARGS, ARGS, TYPE, GCCP)
123 #define CALL_DUMMY_ADDRESS() entry_point_address ()
124 #define SIZEOF_CALL_DUMMY_WORDS 0
125 #define SAVE_DUMMY_FRAME_TOS(SP) generic_save_dummy_frame_tos (SP)
127 extern CORE_ADDR
mcore_push_return_address (CORE_ADDR
, CORE_ADDR
);
128 #define PUSH_RETURN_ADDRESS(PC, SP) mcore_push_return_address (PC, SP)
130 #define PUSH_DUMMY_FRAME generic_push_dummy_frame ()
132 extern CORE_ADDR
mcore_push_arguments (int, struct value
**, CORE_ADDR
,
133 unsigned char, CORE_ADDR
);
134 #define PUSH_ARGUMENTS(NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR) \
135 (SP) = mcore_push_arguments (NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR)
137 #define PC_IN_CALL_DUMMY(PC, SP, FP) generic_pc_in_call_dummy (PC, SP, FP)
139 /* MCore will never pass a sturcture by reference. It will always be split
140 between registers and stack. */
141 #define REG_STRUCT_HAS_ADDR(GCC_P, TYPE) 0
143 extern use_struct_convention_fn mcore_use_struct_convention
;
144 #define USE_STRUCT_CONVENTION(GCC_P, TYPE) mcore_use_struct_convention (GCC_P, TYPE)
146 /* override the default get_saved_register function with
147 one that takes account of generic CALL_DUMMY frames */
148 #define GET_SAVED_REGISTER(raw_buffer, optimized, addrp, frame, regnum, lval) \
149 generic_get_saved_register (raw_buffer, optimized, addrp, frame, regnum, lval)
151 /* Cons up virtual frame pointer for trace */
152 extern void mcore_virtual_frame_pointer (CORE_ADDR
, long *, long *);
153 #define TARGET_VIRTUAL_FRAME_POINTER(PC, REGP, OFFP) \
154 mcore_virtual_frame_pointer ((PC), (REGP), (OFFP))
156 /* MCore can be bi-endian. */
157 #define TARGET_BYTE_ORDER_SELECTABLE_P 1
159 /* For PE, gcc will tell us what th real type of
160 arguments are when it promotes arguments. */
161 #define BELIEVE_PCC_PROMOTION 1