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c906108c | 1 | /* Parameters for execution on a Fujitsu FR30 processor. |
7a292a7a | 2 | Copyright 1999, Free Software Foundation, Inc. |
c906108c SS |
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, Boston, MA 02111-1307, USA. */ | |
19 | ||
20 | #define FR30_GENREGS 16 | |
21 | #define FR30_DEDICATEDREGS 8 | |
22 | #define FR30_REGSIZE 4 /* bytes */ | |
23 | ||
24 | #define NUM_REGS (FR30_GENREGS + FR30_DEDICATEDREGS) | |
25 | #define REGISTER_BYTES ((FR30_GENREGS + FR30_DEDICATEDREGS)*FR30_REGSIZE) | |
26 | ||
27 | /* Index within `registers' of the first byte of the space for | |
28 | register N. */ | |
29 | #define REGISTER_BYTE(N) ((N) * FR30_REGSIZE) | |
30 | ||
31 | /* Initializer for an array of names of registers. | |
32 | There should be NUM_REGS strings in this initializer. */ | |
33 | #define REGISTER_NAMES \ | |
34 | { "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", \ | |
35 | "r9", "r10", "r11", "r12", "r13", "r14", "r15", \ | |
36 | "pc", "ps", "tbr", "rp", "ssp", "usp", "mdh", "mdl" } | |
37 | ||
38 | /* Offset from address of function to start of its code. | |
39 | Zero on most machines. */ | |
40 | #define FUNCTION_START_OFFSET 0 | |
41 | ||
42 | /* Amount PC must be decremented by after a breakpoint. | |
43 | This is often the number of bytes in BREAKPOINT | |
44 | but not always. */ | |
45 | ||
46 | #define DECR_PC_AFTER_BREAK 0 | |
47 | ||
48 | /* Stack grows downward. */ | |
49 | ||
50 | #define INNER_THAN(lhs,rhs) ((lhs) < (rhs)) | |
51 | ||
52 | #define TARGET_BYTE_ORDER BIG_ENDIAN | |
53 | ||
54 | #define R0_REGNUM 0 | |
55 | #define R1_REGNUM 1 | |
56 | #define R2_REGNUM 2 | |
57 | #define R3_REGNUM 3 | |
58 | #define R4_REGNUM 4 | |
59 | #define R5_REGNUM 5 | |
60 | #define R6_REGNUM 6 | |
61 | #define R7_REGNUM 7 | |
62 | #define R8_REGNUM 8 | |
63 | #define R9_REGNUM 9 | |
64 | #define R10_REGNUM 10 | |
65 | #define R11_REGNUM 11 | |
66 | #define R12_REGNUM 12 | |
67 | #define R13_REGNUM 13 | |
68 | #define FP_REGNUM 14 /* Frame pointer */ | |
69 | #define SP_REGNUM 15 /* Stack pointer */ | |
70 | #define PC_REGNUM 16 /* Program counter */ | |
71 | #define RP_REGNUM 19 /* Return pointer */ | |
72 | ||
73 | #define FIRST_ARGREG R4_REGNUM /* first arg (or struct ret val addr) */ | |
74 | #define LAST_ARGREG R7_REGNUM /* fourth (or third arg) */ | |
75 | #define RETVAL_REG R4_REGNUM /* return vaue */ | |
76 | ||
77 | /* Say how long (ordinary) registers are. This is a piece of bogosity | |
78 | used in push_word and a few other places; REGISTER_RAW_SIZE is the | |
79 | real way to know how big a register is. */ | |
80 | #define REGISTER_SIZE FR30_REGSIZE | |
81 | ||
82 | /* Number of bytes of storage in the actual machine representation | |
83 | for register N. */ | |
84 | #define REGISTER_RAW_SIZE(N) FR30_REGSIZE | |
85 | ||
86 | /* Largest value REGISTER_RAW_SIZE can have. */ | |
87 | #define MAX_REGISTER_RAW_SIZE FR30_REGSIZE | |
88 | ||
89 | /* Number of bytes of storage in the program's representation | |
90 | for register N. */ | |
91 | #define REGISTER_VIRTUAL_SIZE(N) REGISTER_RAW_SIZE(N) | |
92 | ||
93 | /* Largest value REGISTER_VIRTUAL_SIZE can have. */ | |
94 | #define MAX_REGISTER_VIRTUAL_SIZE FR30_REGSIZE | |
95 | ||
96 | extern void fr30_pop_frame PARAMS ((void)); | |
97 | #define POP_FRAME fr30_pop_frame() | |
98 | ||
7a292a7a | 99 | #define USE_GENERIC_DUMMY_FRAMES 1 |
c906108c SS |
100 | #define CALL_DUMMY {0} |
101 | #define CALL_DUMMY_START_OFFSET (0) | |
102 | #define CALL_DUMMY_BREAKPOINT_OFFSET (0) | |
103 | #define CALL_DUMMY_LOCATION AT_ENTRY_POINT | |
104 | #define FIX_CALL_DUMMY(DUMMY, START, FUNADDR, NARGS, ARGS, TYPE, GCCP) | |
105 | #define CALL_DUMMY_ADDRESS() entry_point_address () | |
106 | #define PUSH_RETURN_ADDRESS(PC, SP) (write_register(RP_REGNUM, CALL_DUMMY_ADDRESS()), SP) | |
107 | #define PUSH_DUMMY_FRAME generic_push_dummy_frame () | |
108 | ||
109 | /* Number of bytes at start of arglist that are not really args. */ | |
110 | #define FRAME_ARGS_SKIP 0 | |
111 | ||
112 | /* Return the GDB type object for the "standard" data type | |
113 | of data in register N. */ | |
114 | #define REGISTER_VIRTUAL_TYPE(REG) builtin_type_int | |
115 | ||
116 | /* Extract from an array REGBUF containing the (raw) register state | |
117 | a function return value of type TYPE, and copy that, in virtual format, | |
118 | into VALBUF. */ | |
119 | #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \ | |
120 | memcpy (VALBUF, REGBUF + REGISTER_BYTE(RETVAL_REG) + \ | |
121 | (TYPE_LENGTH(TYPE) < 4 ? 4 - TYPE_LENGTH(TYPE) : 0), TYPE_LENGTH (TYPE)) | |
122 | ||
123 | /* Extract from an array REGBUF containing the (raw) register state | |
124 | the address in which a function should return its structure value, | |
125 | as a CORE_ADDR (or an expression that can be used as one). */ | |
126 | #define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) \ | |
127 | extract_address (REGBUF + REGISTER_BYTE (RETVAL_REG), \ | |
128 | REGISTER_RAW_SIZE (RETVAL_REG)) | |
129 | ||
130 | #define STORE_STRUCT_RETURN(ADDR, SP) \ | |
131 | { write_register (RETVAL_REG, (ADDR)); } | |
132 | ||
7a292a7a | 133 | #define FRAME_ARGS_ADDRESS(fi) ((fi)->frame) |
c906108c SS |
134 | #define FRAME_LOCALS_ADDRESS(fi) ((fi)->frame) |
135 | ||
136 | /* Return number of args passed to a frame. | |
137 | Can return -1, meaning no way to tell. */ | |
138 | #define FRAME_NUM_ARGS(numargs, fi) (numargs = -1) | |
139 | ||
140 | #ifdef __STDC__ /* Forward decls for prototypes */ | |
141 | struct frame_info; | |
142 | struct frame_saved_regs; | |
143 | struct type; | |
144 | struct value; | |
145 | #endif | |
146 | ||
147 | #define EXTRA_FRAME_INFO \ | |
148 | struct frame_saved_regs fsr; \ | |
149 | int framesize; \ | |
150 | int frameoffset; \ | |
151 | int framereg; | |
152 | ||
153 | extern CORE_ADDR fr30_frame_chain PARAMS ((struct frame_info *fi)); | |
154 | #define FRAME_CHAIN(fi) fr30_frame_chain (fi) | |
155 | ||
156 | extern CORE_ADDR fr30_frame_saved_pc PARAMS ((struct frame_info *)); | |
157 | #define FRAME_SAVED_PC(fi) (fr30_frame_saved_pc (fi)) | |
158 | ||
159 | #define SAVED_PC_AFTER_CALL(fi) read_register (RP_REGNUM) | |
160 | ||
161 | extern CORE_ADDR fr30_skip_prologue PARAMS ((CORE_ADDR pc)); | |
162 | #define SKIP_PROLOGUE(pc) pc = fr30_skip_prologue (pc) | |
163 | ||
7a292a7a SS |
164 | /* Write into appropriate registers a function return value of type |
165 | TYPE, given in virtual format. VALBUF is in the target byte order; | |
166 | it's typically the VALUE_CONTENTS of some struct value, and those | |
167 | are in the target's byte order. */ | |
168 | extern void fr30_store_return_value PARAMS ((struct type *type, char *valbuf)); | |
c906108c SS |
169 | |
170 | #define STORE_RETURN_VALUE(TYPE,VALBUF) \ | |
7a292a7a | 171 | (fr30_store_return_value ((TYPE), (VALBUF))) |
c906108c SS |
172 | |
173 | /* Put here the code to store, into a struct frame_saved_regs, | |
174 | the addresses of the saved registers of frame described by FRAME_INFO. | |
175 | This includes special registers such as pc and fp saved in special | |
176 | ways in the stack frame. sp is even more special: | |
177 | the address we return for it IS the sp for the next frame. */ | |
178 | #define FRAME_FIND_SAVED_REGS(fi, regaddr) regaddr = fi->fsr | |
179 | ||
180 | /* Use INT #BREAKPOINT_INTNUM instruction for breakpoint */ | |
181 | #define FR30_BREAKOP 0x1f /* opcode, type D instruction */ | |
182 | #define BREAKPOINT_INTNUM 9 /* one of the reserved traps */ | |
183 | #define BREAKPOINT {FR30_BREAKOP, BREAKPOINT_INTNUM} | |
184 | ||
185 | /* Define this for Wingdb */ | |
186 | #define TARGET_FR30 | |
187 | ||
188 | /* IEEE format floating point */ | |
189 | #define IEEE_FLOAT | |
190 | ||
191 | /* Define other aspects of the stack frame. */ | |
192 | ||
193 | /* A macro that tells us whether the function invocation represented | |
194 | by FI does not have a frame on the stack associated with it. If it | |
195 | does not, FRAMELESS is set to 1, else 0. */ | |
196 | #define FRAMELESS_FUNCTION_INVOCATION(FI, FRAMELESS) \ | |
197 | { \ | |
198 | CORE_ADDR func_start, after_prologue; \ | |
199 | func_start = (get_pc_function_start ((FI)->pc) + \ | |
200 | FUNCTION_START_OFFSET); \ | |
201 | after_prologue = func_start; \ | |
202 | SKIP_PROLOGUE (after_prologue); \ | |
203 | (FRAMELESS) = (after_prologue == func_start); \ | |
204 | } | |
205 | ||
206 | extern void fr30_init_extra_frame_info PARAMS ((struct frame_info *fi)); | |
207 | #define INIT_EXTRA_FRAME_INFO(fromleaf, fi) fr30_init_extra_frame_info (fi) | |
208 | ||
209 | #define FRAME_CHAIN_VALID(FP, FI) generic_frame_chain_valid (FP, FI) | |
210 | ||
211 | extern CORE_ADDR | |
212 | fr30_push_arguments PARAMS ((int nargs, struct value **args, CORE_ADDR sp, | |
213 | int struct_return, | |
214 | CORE_ADDR struct_addr)); | |
215 | #define PUSH_ARGUMENTS(NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR) \ | |
216 | (SP) = fr30_push_arguments (NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR) | |
217 | ||
7a292a7a | 218 | #define PC_IN_CALL_DUMMY(PC, SP, FP) generic_pc_in_call_dummy (PC, SP, FP) |
c906108c SS |
219 | |
220 | /* Fujitsu's ABI requires all structs to be passed using a pointer. | |
221 | That is obviously not very efficient, so I am leaving the definitions | |
222 | to make gdb work with GCC style struct passing, in case we decide | |
223 | to go for better performance, rather than for compatibility with | |
224 | Fujitsu (just change STRUCT_ALWAYS_BY_ADDR to 0) */ | |
225 | ||
226 | #define STRUCT_ALWAYS_BY_ADDR 1 | |
227 | ||
228 | #if(STRUCT_ALWAYS_BY_ADDR) | |
229 | #define REG_STRUCT_HAS_ADDR(gcc_p,type) 1 | |
230 | #else | |
231 | /* more standard GCC (optimized) */ | |
232 | #define REG_STRUCT_HAS_ADDR(gcc_p,type) \ | |
233 | ((TYPE_LENGTH(type) > 4) && (TYPE_LENGTH(type) & 0x3)) | |
234 | #endif | |
235 | /* alway return struct by value by input pointer */ | |
236 | #define USE_STRUCT_CONVENTION(GCC_P, TYPE) 1 | |
7a292a7a SS |
237 | |
238 | /* The stack should always be aligned on a four-word boundary. */ | |
239 | #define STACK_ALIGN(len) (((len) + 3) & ~3) | |
240 | ||
241 | /* I think the comment about this in value_arg_coerce is wrong; this | |
242 | should be true on any system where you can rely on the prototyping | |
243 | information. When this is true, value_arg_coerce will promote | |
244 | floats to doubles iff the function is not prototyped. */ | |
245 | #define COERCE_FLOAT_TO_DOUBLE 1 |