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96baa820 JM |
1 | /* Parameters for execution on a Motorola MCore. |
2 | Copyright (C) 1995 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of GDB. | |
5 | ||
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. | |
10 | ||
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. | |
15 | ||
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. */ | |
20 | ||
11cf8741 JM |
21 | /* The mcore is little endian (by default) */ |
22 | #define TARGET_BYTE_ORDER_DEFAULT LITTLE_ENDIAN | |
96baa820 JM |
23 | |
24 | /* All registers are 32 bits */ | |
25 | #define REGISTER_SIZE 4 | |
26 | #define MAX_REGISTER_RAW_SIZE 4 | |
27 | ||
28 | #define REGISTER_VIRTUAL_TYPE(REG) builtin_type_int | |
29 | ||
30 | #define REGISTER_BYTE(REG) ((REG) * REGISTER_SIZE) | |
31 | #define REGISTER_VIRTUAL_SIZE(REG) 4 | |
32 | #define REGISTER_RAW_SIZE(REG) 4 | |
33 | ||
34 | #define MAX_REGISTER_VIRTUAL_SIZE 4 | |
35 | ||
36 | #define REGISTER_BYTES (NUM_REGS * REGISTER_SIZE) | |
37 | ||
38 | extern char *mcore_register_names[]; | |
39 | #define REGISTER_NAME(I) mcore_register_names[I] | |
40 | ||
41 | /* Registers. The Motorola MCore contains: | |
42 | ||
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) | |
46 | + 1 pc | |
47 | ------ | |
48 | 65 registers */ | |
49 | #define NUM_REGS 65 | |
50 | #define PC_REGNUM 64 | |
51 | #define SP_REGNUM 0 | |
52 | #define FP_REGNUM (SP_REGNUM) | |
53 | #define PR_REGNUM 15 | |
54 | #define FIRST_ARGREG 2 | |
55 | #define LAST_ARGREG 7 | |
56 | #define RETVAL_REGNUM 2 | |
57 | ||
58 | /* Offset from address of function to start of its code. | |
59 | Zero on most machines. */ | |
60 | #define FUNCTION_START_OFFSET 0 | |
61 | ||
62 | #define DECR_PC_AFTER_BREAK 0 | |
63 | ||
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) | |
68 | ||
69 | #define INNER_THAN(LHS,RHS) ((LHS) < (RHS)) | |
70 | ||
71 | #define SAVED_PC_AFTER_CALL(FRAME) read_register (PR_REGNUM) | |
72 | ||
73 | struct frame_info; | |
74 | struct type; | |
75 | struct value; | |
76 | ||
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 */ | |
81 | ||
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_frame_chain_valid ((FP), (FI)) | |
85 | ||
86 | extern CORE_ADDR mcore_frame_saved_pc (struct frame_info *); | |
87 | #define FRAME_SAVED_PC(FI) (mcore_frame_saved_pc ((FI))) | |
88 | ||
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)) | |
92 | ||
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)); | |
96 | ||
97 | #define STORE_STRUCT_RETURN(ADDR, SP) /* handled by mcore_push_arguments */ | |
98 | ||
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) | |
102 | ||
103 | extern CORE_ADDR mcore_skip_prologue (CORE_ADDR pc); | |
104 | #define SKIP_PROLOGUE(PC) (PC) = mcore_skip_prologue ((PC)) | |
105 | ||
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) | |
112 | ||
113 | ||
114 | extern void mcore_pop_frame (struct frame_info *fi); | |
115 | #define POP_FRAME mcore_pop_frame (get_current_frame ()) | |
116 | ||
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 | |
7be570e7 | 125 | #define SAVE_DUMMY_FRAME_TOS(SP) generic_save_dummy_frame_tos (SP) |
96baa820 JM |
126 | |
127 | extern CORE_ADDR mcore_push_return_address PARAMS ((CORE_ADDR, CORE_ADDR)); | |
128 | #define PUSH_RETURN_ADDRESS(PC, SP) mcore_push_return_address (PC, SP) | |
129 | ||
130 | #define PUSH_DUMMY_FRAME generic_push_dummy_frame () | |
131 | ||
132 | extern CORE_ADDR mcore_push_arguments PARAMS ((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) | |
136 | ||
137 | #define PC_IN_CALL_DUMMY(PC, SP, FP) generic_pc_in_call_dummy (PC, SP, FP) | |
138 | ||
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 | |
142 | ||
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) | |
145 | ||
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) | |
150 | ||
151 | /* Cons up virtual frame pointer for trace */ | |
152 | extern void mcore_virtual_frame_pointer PARAMS ((CORE_ADDR, long *, long *)); | |
153 | #define TARGET_VIRTUAL_FRAME_POINTER(PC, REGP, OFFP) \ | |
154 | mcore_virtual_frame_pointer ((PC), (REGP), (OFFP)) | |
155 | ||
156 | /* MCore can be bi-endian. */ | |
157 | #define TARGET_BYTE_ORDER_SELECTABLE_P 1 | |
158 | ||
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 |