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c906108c SS |
1 | /* Parameters for execution on a Fujitsu FR30 processor. |
2 | ||
3 | This file is part of GDB. | |
4 | ||
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation; either version 2 of the License, or | |
8 | (at your option) any later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program; if not, write to the Free Software | |
17 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
18 | ||
19 | #define FR30_GENREGS 16 | |
20 | #define FR30_DEDICATEDREGS 8 | |
21 | #define FR30_REGSIZE 4 /* bytes */ | |
22 | ||
23 | #define NUM_REGS (FR30_GENREGS + FR30_DEDICATEDREGS) | |
24 | #define REGISTER_BYTES ((FR30_GENREGS + FR30_DEDICATEDREGS)*FR30_REGSIZE) | |
25 | ||
26 | /* Index within `registers' of the first byte of the space for | |
27 | register N. */ | |
28 | #define REGISTER_BYTE(N) ((N) * FR30_REGSIZE) | |
29 | ||
30 | /* Initializer for an array of names of registers. | |
31 | There should be NUM_REGS strings in this initializer. */ | |
32 | #define REGISTER_NAMES \ | |
33 | { "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", \ | |
34 | "r9", "r10", "r11", "r12", "r13", "r14", "r15", \ | |
35 | "pc", "ps", "tbr", "rp", "ssp", "usp", "mdh", "mdl" } | |
36 | ||
37 | /* Offset from address of function to start of its code. | |
38 | Zero on most machines. */ | |
39 | #define FUNCTION_START_OFFSET 0 | |
40 | ||
41 | /* Amount PC must be decremented by after a breakpoint. | |
42 | This is often the number of bytes in BREAKPOINT | |
43 | but not always. */ | |
44 | ||
45 | #define DECR_PC_AFTER_BREAK 0 | |
46 | ||
47 | /* Stack grows downward. */ | |
48 | ||
49 | #define INNER_THAN(lhs,rhs) ((lhs) < (rhs)) | |
50 | ||
51 | #define TARGET_BYTE_ORDER BIG_ENDIAN | |
52 | ||
53 | #define R0_REGNUM 0 | |
54 | #define R1_REGNUM 1 | |
55 | #define R2_REGNUM 2 | |
56 | #define R3_REGNUM 3 | |
57 | #define R4_REGNUM 4 | |
58 | #define R5_REGNUM 5 | |
59 | #define R6_REGNUM 6 | |
60 | #define R7_REGNUM 7 | |
61 | #define R8_REGNUM 8 | |
62 | #define R9_REGNUM 9 | |
63 | #define R10_REGNUM 10 | |
64 | #define R11_REGNUM 11 | |
65 | #define R12_REGNUM 12 | |
66 | #define R13_REGNUM 13 | |
67 | #define FP_REGNUM 14 /* Frame pointer */ | |
68 | #define SP_REGNUM 15 /* Stack pointer */ | |
69 | #define PC_REGNUM 16 /* Program counter */ | |
70 | #define RP_REGNUM 19 /* Return pointer */ | |
71 | ||
72 | #define FIRST_ARGREG R4_REGNUM /* first arg (or struct ret val addr) */ | |
73 | #define LAST_ARGREG R7_REGNUM /* fourth (or third arg) */ | |
74 | #define RETVAL_REG R4_REGNUM /* return vaue */ | |
75 | ||
76 | /* Say how long (ordinary) registers are. This is a piece of bogosity | |
77 | used in push_word and a few other places; REGISTER_RAW_SIZE is the | |
78 | real way to know how big a register is. */ | |
79 | #define REGISTER_SIZE FR30_REGSIZE | |
80 | ||
81 | /* Number of bytes of storage in the actual machine representation | |
82 | for register N. */ | |
83 | #define REGISTER_RAW_SIZE(N) FR30_REGSIZE | |
84 | ||
85 | /* Largest value REGISTER_RAW_SIZE can have. */ | |
86 | #define MAX_REGISTER_RAW_SIZE FR30_REGSIZE | |
87 | ||
88 | /* Number of bytes of storage in the program's representation | |
89 | for register N. */ | |
90 | #define REGISTER_VIRTUAL_SIZE(N) REGISTER_RAW_SIZE(N) | |
91 | ||
92 | /* Largest value REGISTER_VIRTUAL_SIZE can have. */ | |
93 | #define MAX_REGISTER_VIRTUAL_SIZE FR30_REGSIZE | |
94 | ||
95 | extern void fr30_pop_frame PARAMS ((void)); | |
96 | #define POP_FRAME fr30_pop_frame() | |
97 | ||
98 | #define USE_GENERIC_DUMMY_FRAMES | |
99 | #define CALL_DUMMY {0} | |
100 | #define CALL_DUMMY_START_OFFSET (0) | |
101 | #define CALL_DUMMY_BREAKPOINT_OFFSET (0) | |
102 | #define CALL_DUMMY_LOCATION AT_ENTRY_POINT | |
103 | #define FIX_CALL_DUMMY(DUMMY, START, FUNADDR, NARGS, ARGS, TYPE, GCCP) | |
104 | #define CALL_DUMMY_ADDRESS() entry_point_address () | |
105 | #define PUSH_RETURN_ADDRESS(PC, SP) (write_register(RP_REGNUM, CALL_DUMMY_ADDRESS()), SP) | |
106 | #define PUSH_DUMMY_FRAME generic_push_dummy_frame () | |
107 | ||
108 | /* Number of bytes at start of arglist that are not really args. */ | |
109 | #define FRAME_ARGS_SKIP 0 | |
110 | ||
111 | /* Return the GDB type object for the "standard" data type | |
112 | of data in register N. */ | |
113 | #define REGISTER_VIRTUAL_TYPE(REG) builtin_type_int | |
114 | ||
115 | /* Extract from an array REGBUF containing the (raw) register state | |
116 | a function return value of type TYPE, and copy that, in virtual format, | |
117 | into VALBUF. */ | |
118 | #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \ | |
119 | memcpy (VALBUF, REGBUF + REGISTER_BYTE(RETVAL_REG) + \ | |
120 | (TYPE_LENGTH(TYPE) < 4 ? 4 - TYPE_LENGTH(TYPE) : 0), TYPE_LENGTH (TYPE)) | |
121 | ||
122 | /* Extract from an array REGBUF containing the (raw) register state | |
123 | the address in which a function should return its structure value, | |
124 | as a CORE_ADDR (or an expression that can be used as one). */ | |
125 | #define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) \ | |
126 | extract_address (REGBUF + REGISTER_BYTE (RETVAL_REG), \ | |
127 | REGISTER_RAW_SIZE (RETVAL_REG)) | |
128 | ||
129 | #define STORE_STRUCT_RETURN(ADDR, SP) \ | |
130 | { write_register (RETVAL_REG, (ADDR)); } | |
131 | ||
132 | #define FRAME_ARGS_ADDRESS(fi) (fi->frame) | |
133 | #define FRAME_LOCALS_ADDRESS(fi) ((fi)->frame) | |
134 | ||
135 | /* Return number of args passed to a frame. | |
136 | Can return -1, meaning no way to tell. */ | |
137 | #define FRAME_NUM_ARGS(numargs, fi) (numargs = -1) | |
138 | ||
139 | #ifdef __STDC__ /* Forward decls for prototypes */ | |
140 | struct frame_info; | |
141 | struct frame_saved_regs; | |
142 | struct type; | |
143 | struct value; | |
144 | #endif | |
145 | ||
146 | #define EXTRA_FRAME_INFO \ | |
147 | struct frame_saved_regs fsr; \ | |
148 | int framesize; \ | |
149 | int frameoffset; \ | |
150 | int framereg; | |
151 | ||
152 | extern CORE_ADDR fr30_frame_chain PARAMS ((struct frame_info *fi)); | |
153 | #define FRAME_CHAIN(fi) fr30_frame_chain (fi) | |
154 | ||
155 | extern CORE_ADDR fr30_frame_saved_pc PARAMS ((struct frame_info *)); | |
156 | #define FRAME_SAVED_PC(fi) (fr30_frame_saved_pc (fi)) | |
157 | ||
158 | #define SAVED_PC_AFTER_CALL(fi) read_register (RP_REGNUM) | |
159 | ||
160 | extern CORE_ADDR fr30_skip_prologue PARAMS ((CORE_ADDR pc)); | |
161 | #define SKIP_PROLOGUE(pc) pc = fr30_skip_prologue (pc) | |
162 | ||
163 | /* Write into appropriate registers a function return value | |
164 | of type TYPE, given in virtual format. */ | |
165 | ||
166 | #define STORE_RETURN_VALUE(TYPE,VALBUF) \ | |
167 | write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE)) | |
168 | ||
169 | /* Put here the code to store, into a struct frame_saved_regs, | |
170 | the addresses of the saved registers of frame described by FRAME_INFO. | |
171 | This includes special registers such as pc and fp saved in special | |
172 | ways in the stack frame. sp is even more special: | |
173 | the address we return for it IS the sp for the next frame. */ | |
174 | #define FRAME_FIND_SAVED_REGS(fi, regaddr) regaddr = fi->fsr | |
175 | ||
176 | /* Use INT #BREAKPOINT_INTNUM instruction for breakpoint */ | |
177 | #define FR30_BREAKOP 0x1f /* opcode, type D instruction */ | |
178 | #define BREAKPOINT_INTNUM 9 /* one of the reserved traps */ | |
179 | #define BREAKPOINT {FR30_BREAKOP, BREAKPOINT_INTNUM} | |
180 | ||
181 | /* Define this for Wingdb */ | |
182 | #define TARGET_FR30 | |
183 | ||
184 | /* IEEE format floating point */ | |
185 | #define IEEE_FLOAT | |
186 | ||
187 | /* Define other aspects of the stack frame. */ | |
188 | ||
189 | /* A macro that tells us whether the function invocation represented | |
190 | by FI does not have a frame on the stack associated with it. If it | |
191 | does not, FRAMELESS is set to 1, else 0. */ | |
192 | #define FRAMELESS_FUNCTION_INVOCATION(FI, FRAMELESS) \ | |
193 | { \ | |
194 | CORE_ADDR func_start, after_prologue; \ | |
195 | func_start = (get_pc_function_start ((FI)->pc) + \ | |
196 | FUNCTION_START_OFFSET); \ | |
197 | after_prologue = func_start; \ | |
198 | SKIP_PROLOGUE (after_prologue); \ | |
199 | (FRAMELESS) = (after_prologue == func_start); \ | |
200 | } | |
201 | ||
202 | extern void fr30_init_extra_frame_info PARAMS ((struct frame_info *fi)); | |
203 | #define INIT_EXTRA_FRAME_INFO(fromleaf, fi) fr30_init_extra_frame_info (fi) | |
204 | ||
205 | #define FRAME_CHAIN_VALID(FP, FI) generic_frame_chain_valid (FP, FI) | |
206 | ||
207 | extern CORE_ADDR | |
208 | fr30_push_arguments PARAMS ((int nargs, struct value **args, CORE_ADDR sp, | |
209 | int struct_return, | |
210 | CORE_ADDR struct_addr)); | |
211 | #define PUSH_ARGUMENTS(NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR) \ | |
212 | (SP) = fr30_push_arguments (NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR) | |
213 | ||
214 | #define PC_IN_CALL_DUMMY(PC, SP, FP) generic_pc_in_call_dummy (PC, SP) | |
215 | ||
216 | /* Fujitsu's ABI requires all structs to be passed using a pointer. | |
217 | That is obviously not very efficient, so I am leaving the definitions | |
218 | to make gdb work with GCC style struct passing, in case we decide | |
219 | to go for better performance, rather than for compatibility with | |
220 | Fujitsu (just change STRUCT_ALWAYS_BY_ADDR to 0) */ | |
221 | ||
222 | #define STRUCT_ALWAYS_BY_ADDR 1 | |
223 | ||
224 | #if(STRUCT_ALWAYS_BY_ADDR) | |
225 | #define REG_STRUCT_HAS_ADDR(gcc_p,type) 1 | |
226 | #else | |
227 | /* more standard GCC (optimized) */ | |
228 | #define REG_STRUCT_HAS_ADDR(gcc_p,type) \ | |
229 | ((TYPE_LENGTH(type) > 4) && (TYPE_LENGTH(type) & 0x3)) | |
230 | #endif | |
231 | /* alway return struct by value by input pointer */ | |
232 | #define USE_STRUCT_CONVENTION(GCC_P, TYPE) 1 |