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96baa820 | 1 | /* Parameters for execution on a Motorola MCore. |
b6ba6518 | 2 | Copyright 1995, 1999, 2000 Free Software Foundation, Inc. |
96baa820 JM |
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 | ||
f88e2c52 AC |
21 | #include "regcache.h" |
22 | ||
11cf8741 JM |
23 | /* The mcore is little endian (by default) */ |
24 | #define TARGET_BYTE_ORDER_DEFAULT LITTLE_ENDIAN | |
96baa820 JM |
25 | |
26 | /* All registers are 32 bits */ | |
27 | #define REGISTER_SIZE 4 | |
28 | #define MAX_REGISTER_RAW_SIZE 4 | |
29 | ||
30 | #define REGISTER_VIRTUAL_TYPE(REG) builtin_type_int | |
31 | ||
32 | #define REGISTER_BYTE(REG) ((REG) * REGISTER_SIZE) | |
33 | #define REGISTER_VIRTUAL_SIZE(REG) 4 | |
34 | #define REGISTER_RAW_SIZE(REG) 4 | |
35 | ||
36 | #define MAX_REGISTER_VIRTUAL_SIZE 4 | |
37 | ||
38 | #define REGISTER_BYTES (NUM_REGS * REGISTER_SIZE) | |
39 | ||
40 | extern char *mcore_register_names[]; | |
41 | #define REGISTER_NAME(I) mcore_register_names[I] | |
42 | ||
43 | /* Registers. The Motorola MCore contains: | |
44 | ||
45 | 16 32-bit general purpose registers (r0-r15) | |
46 | 16 32-bit alternate file registers (ar0-ar15) | |
47 | 32 32-bit control registers (cr0-cr31) | |
48 | + 1 pc | |
49 | ------ | |
50 | 65 registers */ | |
51 | #define NUM_REGS 65 | |
52 | #define PC_REGNUM 64 | |
53 | #define SP_REGNUM 0 | |
54 | #define FP_REGNUM (SP_REGNUM) | |
55 | #define PR_REGNUM 15 | |
56 | #define FIRST_ARGREG 2 | |
57 | #define LAST_ARGREG 7 | |
58 | #define RETVAL_REGNUM 2 | |
59 | ||
60 | /* Offset from address of function to start of its code. | |
61 | Zero on most machines. */ | |
62 | #define FUNCTION_START_OFFSET 0 | |
63 | ||
64 | #define DECR_PC_AFTER_BREAK 0 | |
65 | ||
66 | /* BREAKPOINT_FROM_PC uses the program counter value to determine | |
67 | the breakpoint that should be used. */ | |
68 | extern breakpoint_from_pc_fn mcore_breakpoint_from_pc; | |
69 | #define BREAKPOINT_FROM_PC(PCPTR, LENPTR) mcore_breakpoint_from_pc (PCPTR, LENPTR) | |
70 | ||
71 | #define INNER_THAN(LHS,RHS) ((LHS) < (RHS)) | |
72 | ||
73 | #define SAVED_PC_AFTER_CALL(FRAME) read_register (PR_REGNUM) | |
74 | ||
75 | struct frame_info; | |
76 | struct type; | |
77 | struct value; | |
78 | ||
79 | extern void mcore_init_extra_frame_info (struct frame_info *fi); | |
80 | #define INIT_EXTRA_FRAME_INFO(FROMLEAF, FI) mcore_init_extra_frame_info ((FI)) | |
81 | #define INIT_FRAME_PC /* Not necessary */ | |
82 | #define FRAME_INIT_SAVED_REGS(FI) /* handled by init_extra_frame_info */ | |
83 | ||
84 | extern CORE_ADDR mcore_frame_chain (struct frame_info *fi); | |
85 | #define FRAME_CHAIN(FI) mcore_frame_chain ((FI)) | |
c4093a6a | 86 | #define FRAME_CHAIN_VALID(FP, FI) generic_file_frame_chain_valid ((FP), (FI)) |
96baa820 JM |
87 | |
88 | extern CORE_ADDR mcore_frame_saved_pc (struct frame_info *); | |
89 | #define FRAME_SAVED_PC(FI) (mcore_frame_saved_pc ((FI))) | |
90 | ||
91 | /* Extracting/storing return values. */ | |
92 | extern void mcore_store_return_value (struct type *type, char *valbuf); | |
93 | #define STORE_RETURN_VALUE(TYPE, VALBUF) mcore_store_return_value ((TYPE), (VALBUF)) | |
94 | ||
95 | extern void mcore_extract_return_value (struct type *type, char *regbut, char *valbuf); | |
96 | #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \ | |
97 | mcore_extract_return_value ((TYPE), (REGBUF), (VALBUF)); | |
98 | ||
99 | #define STORE_STRUCT_RETURN(ADDR, SP) /* handled by mcore_push_arguments */ | |
100 | ||
101 | extern CORE_ADDR mcore_extract_struct_value_address (char *regbuf); | |
102 | #define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) \ | |
103 | mcore_extract_struct_value_address (REGBUF) | |
104 | ||
105 | extern CORE_ADDR mcore_skip_prologue (CORE_ADDR pc); | |
585230bd | 106 | #define SKIP_PROLOGUE(PC) mcore_skip_prologue (PC) |
96baa820 JM |
107 | |
108 | #define FRAME_ARGS_SKIP 0 | |
109 | extern CORE_ADDR mcore_frame_args_address (struct frame_info *fi); | |
110 | #define FRAME_ARGS_ADDRESS(FI) mcore_frame_args_address ((FI)) | |
111 | extern CORE_ADDR mcore_frame_locals_address (struct frame_info *fi); | |
112 | #define FRAME_LOCALS_ADDRESS(FI) mcore_frame_locals_address ((FI)) | |
113 | #define FRAME_NUM_ARGS(FI) (-1) | |
114 | ||
115 | ||
116 | extern void mcore_pop_frame (struct frame_info *fi); | |
117 | #define POP_FRAME mcore_pop_frame (get_current_frame ()) | |
118 | ||
119 | #define USE_GENERIC_DUMMY_FRAMES 1 | |
120 | #define CALL_DUMMY {0} | |
121 | #define CALL_DUMMY_START_OFFSET (0) | |
122 | #define CALL_DUMMY_BREAKPOINT_OFFSET (0) | |
123 | #define CALL_DUMMY_LOCATION AT_ENTRY_POINT | |
124 | #define FIX_CALL_DUMMY(DUMMY, START, FUNADDR, NARGS, ARGS, TYPE, GCCP) | |
125 | #define CALL_DUMMY_ADDRESS() entry_point_address () | |
126 | #define SIZEOF_CALL_DUMMY_WORDS 0 | |
7be570e7 | 127 | #define SAVE_DUMMY_FRAME_TOS(SP) generic_save_dummy_frame_tos (SP) |
96baa820 | 128 | |
a14ed312 | 129 | extern CORE_ADDR mcore_push_return_address (CORE_ADDR, CORE_ADDR); |
96baa820 JM |
130 | #define PUSH_RETURN_ADDRESS(PC, SP) mcore_push_return_address (PC, SP) |
131 | ||
132 | #define PUSH_DUMMY_FRAME generic_push_dummy_frame () | |
133 | ||
a14ed312 KB |
134 | extern CORE_ADDR mcore_push_arguments (int, struct value **, CORE_ADDR, |
135 | unsigned char, CORE_ADDR); | |
96baa820 JM |
136 | #define PUSH_ARGUMENTS(NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR) \ |
137 | (SP) = mcore_push_arguments (NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR) | |
138 | ||
139 | #define PC_IN_CALL_DUMMY(PC, SP, FP) generic_pc_in_call_dummy (PC, SP, FP) | |
140 | ||
141 | /* MCore will never pass a sturcture by reference. It will always be split | |
142 | between registers and stack. */ | |
143 | #define REG_STRUCT_HAS_ADDR(GCC_P, TYPE) 0 | |
144 | ||
145 | extern use_struct_convention_fn mcore_use_struct_convention; | |
146 | #define USE_STRUCT_CONVENTION(GCC_P, TYPE) mcore_use_struct_convention (GCC_P, TYPE) | |
147 | ||
148 | /* override the default get_saved_register function with | |
149 | one that takes account of generic CALL_DUMMY frames */ | |
150 | #define GET_SAVED_REGISTER(raw_buffer, optimized, addrp, frame, regnum, lval) \ | |
151 | generic_get_saved_register (raw_buffer, optimized, addrp, frame, regnum, lval) | |
152 | ||
153 | /* Cons up virtual frame pointer for trace */ | |
a14ed312 | 154 | extern void mcore_virtual_frame_pointer (CORE_ADDR, long *, long *); |
96baa820 JM |
155 | #define TARGET_VIRTUAL_FRAME_POINTER(PC, REGP, OFFP) \ |
156 | mcore_virtual_frame_pointer ((PC), (REGP), (OFFP)) | |
157 | ||
158 | /* MCore can be bi-endian. */ | |
159 | #define TARGET_BYTE_ORDER_SELECTABLE_P 1 | |
160 | ||
161 | /* For PE, gcc will tell us what th real type of | |
162 | arguments are when it promotes arguments. */ | |
163 | #define BELIEVE_PCC_PROMOTION 1 |