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c906108c SS |
1 | /* Target machine definitions for GDB on a Sequent Symmetry under dynix 3.0, |
2 | with Weitek 1167 and i387 support. | |
3 | Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994 | |
4 | Free Software Foundation, Inc. | |
5 | Symmetry version by Jay Vosburgh (fubar@sequent.com). | |
6 | ||
7 | This file is part of GDB. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 2 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program; if not, write to the Free Software | |
21 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
22 | ||
23 | #ifndef TM_SYMMETRY_H | |
24 | #define TM_SYMMETRY_H 1 | |
25 | ||
26 | /* I don't know if this will work for cross-debugging, even if you do get | |
27 | a copy of the right include file. */ | |
28 | #include <machine/reg.h> | |
29 | ||
30 | #include "i386/tm-i386v.h" | |
31 | ||
32 | #undef START_INFERIOR_TRAPS_EXPECTED | |
33 | #define START_INFERIOR_TRAPS_EXPECTED 2 | |
34 | ||
35 | /* Amount PC must be decremented by after a breakpoint. This is often the | |
36 | number of bytes in BREAKPOINT but not always (such as now). */ | |
37 | ||
38 | #undef DECR_PC_AFTER_BREAK | |
39 | #define DECR_PC_AFTER_BREAK 0 | |
40 | ||
41 | #if 0 | |
42 | /* --- this code can't be used unless we know we are running native, | |
43 | since it uses host specific ptrace calls. */ | |
44 | /* code for 80387 fpu. Functions are from i386-dep.c, copied into | |
45 | * symm-dep.c. | |
46 | */ | |
47 | #define FLOAT_INFO { i386_float_info(); } | |
48 | #endif | |
49 | ||
50 | /* Number of machine registers */ | |
51 | ||
52 | #undef NUM_REGS | |
53 | #define NUM_REGS 49 | |
54 | ||
55 | /* Initializer for an array of names of registers. | |
56 | There should be NUM_REGS strings in this initializer. */ | |
57 | ||
58 | /* Initializer for an array of names of registers. There should be at least | |
59 | NUM_REGS strings in this initializer. Any excess ones are simply ignored. | |
60 | Symmetry registers are in this weird order to match the register numbers | |
61 | in the symbol table entries. If you change the order, things will probably | |
62 | break mysteriously for no apparent reason. Also note that the st(0)... | |
63 | st(7) 387 registers are represented as st0...st7. */ | |
64 | ||
65 | #undef REGISTER_NAMES | |
66 | #define REGISTER_NAMES { "eax", "edx", "ecx", "st0", "st1", \ | |
67 | "ebx", "esi", "edi", "st2", "st3", \ | |
68 | "st4", "st5", "st6", "st7", "esp", \ | |
69 | "ebp", "eip", "eflags","fp1", "fp2", \ | |
70 | "fp3", "fp4", "fp5", "fp6", "fp7", \ | |
71 | "fp8", "fp9", "fp10", "fp11", "fp12", \ | |
72 | "fp13", "fp14", "fp15", "fp16", "fp17", \ | |
73 | "fp18", "fp19", "fp20", "fp21", "fp22", \ | |
74 | "fp23", "fp24", "fp25", "fp26", "fp27", \ | |
75 | "fp28", "fp29", "fp30", "fp31" } | |
76 | ||
77 | /* Register numbers of various important registers. | |
78 | Note that some of these values are "real" register numbers, | |
79 | and correspond to the general registers of the machine, | |
80 | and some are "phony" register numbers which are too large | |
81 | to be actual register numbers as far as the user is concerned | |
82 | but do serve to get the desired values when passed to read_register. */ | |
83 | ||
84 | #define EAX_REGNUM 0 | |
85 | #define EDX_REGNUM 1 | |
86 | #define ECX_REGNUM 2 | |
87 | #define ST0_REGNUM 3 | |
88 | #define ST1_REGNUM 4 | |
89 | #define EBX_REGNUM 5 | |
90 | #define ESI_REGNUM 6 | |
91 | #define EDI_REGNUM 7 | |
92 | #define ST2_REGNUM 8 | |
93 | #define ST3_REGNUM 9 | |
94 | ||
95 | #define ST4_REGNUM 10 | |
96 | #define ST5_REGNUM 11 | |
97 | #define ST6_REGNUM 12 | |
98 | #define ST7_REGNUM 13 | |
99 | ||
100 | #define FP1_REGNUM 18 /* first 1167 register */ | |
101 | /* Get %fp2 - %fp31 by addition, since they are contiguous */ | |
102 | ||
103 | #undef SP_REGNUM | |
104 | #define SP_REGNUM 14 /* (usp) Contains address of top of stack */ | |
105 | #define ESP_REGNUM 14 | |
106 | #undef FP_REGNUM | |
107 | #define FP_REGNUM 15 /* (ebp) Contains address of executing stack frame */ | |
108 | #define EBP_REGNUM 15 | |
109 | #undef PC_REGNUM | |
110 | #define PC_REGNUM 16 /* (eip) Contains program counter */ | |
111 | #define EIP_REGNUM 16 | |
112 | #undef PS_REGNUM | |
113 | #define PS_REGNUM 17 /* (ps) Contains processor status */ | |
114 | #define EFLAGS_REGNUM 17 | |
115 | ||
116 | /* | |
117 | * Following macro translates i386 opcode register numbers to Symmetry | |
118 | * register numbers. This is used by i386_frame_find_saved_regs. | |
119 | * | |
120 | * %eax %ecx %edx %ebx %esp %ebp %esi %edi | |
121 | * i386 0 1 2 3 4 5 6 7 | |
122 | * Symmetry 0 2 1 5 14 15 6 7 | |
123 | * | |
124 | */ | |
125 | #define I386_REGNO_TO_SYMMETRY(n) \ | |
126 | ((n)==0?0 :(n)==1?2 :(n)==2?1 :(n)==3?5 :(n)==4?14 :(n)==5?15 :(n)) | |
127 | ||
128 | /* The magic numbers below are offsets into u_ar0 in the user struct. | |
129 | * They live in <machine/reg.h>. Gdb calls this macro with blockend | |
130 | * holding u.u_ar0 - KERNEL_U_ADDR. Only the registers listed are | |
131 | * saved in the u area (along with a few others that aren't useful | |
132 | * here. See <machine/reg.h>). | |
133 | */ | |
134 | ||
135 | #define REGISTER_U_ADDR(addr, blockend, regno) \ | |
136 | { struct user foo; /* needed for finding fpu regs */ \ | |
137 | switch (regno) { \ | |
138 | case 0: \ | |
139 | addr = blockend + EAX * sizeof(int); break; \ | |
140 | case 1: \ | |
141 | addr = blockend + EDX * sizeof(int); break; \ | |
142 | case 2: \ | |
143 | addr = blockend + ECX * sizeof(int); break; \ | |
144 | case 3: /* st(0) */ \ | |
145 | addr = ((int)&foo.u_fpusave.fpu_stack[0][0] - (int)&foo); \ | |
146 | break; \ | |
147 | case 4: /* st(1) */ \ | |
148 | addr = ((int) &foo.u_fpusave.fpu_stack[1][0] - (int)&foo); \ | |
149 | break; \ | |
150 | case 5: \ | |
151 | addr = blockend + EBX * sizeof(int); break; \ | |
152 | case 6: \ | |
153 | addr = blockend + ESI * sizeof(int); break; \ | |
154 | case 7: \ | |
155 | addr = blockend + EDI * sizeof(int); break; \ | |
156 | case 8: /* st(2) */ \ | |
157 | addr = ((int) &foo.u_fpusave.fpu_stack[2][0] - (int)&foo); \ | |
158 | break; \ | |
159 | case 9: /* st(3) */ \ | |
160 | addr = ((int) &foo.u_fpusave.fpu_stack[3][0] - (int)&foo); \ | |
161 | break; \ | |
162 | case 10: /* st(4) */ \ | |
163 | addr = ((int) &foo.u_fpusave.fpu_stack[4][0] - (int)&foo); \ | |
164 | break; \ | |
165 | case 11: /* st(5) */ \ | |
166 | addr = ((int) &foo.u_fpusave.fpu_stack[5][0] - (int)&foo); \ | |
167 | break; \ | |
168 | case 12: /* st(6) */ \ | |
169 | addr = ((int) &foo.u_fpusave.fpu_stack[6][0] - (int)&foo); \ | |
170 | break; \ | |
171 | case 13: /* st(7) */ \ | |
172 | addr = ((int) &foo.u_fpusave.fpu_stack[7][0] - (int)&foo); \ | |
173 | break; \ | |
174 | case 14: \ | |
175 | addr = blockend + ESP * sizeof(int); break; \ | |
176 | case 15: \ | |
177 | addr = blockend + EBP * sizeof(int); break; \ | |
178 | case 16: \ | |
179 | addr = blockend + EIP * sizeof(int); break; \ | |
180 | case 17: \ | |
181 | addr = blockend + FLAGS * sizeof(int); break; \ | |
182 | case 18: /* fp1 */ \ | |
183 | case 19: /* fp2 */ \ | |
184 | case 20: /* fp3 */ \ | |
185 | case 21: /* fp4 */ \ | |
186 | case 22: /* fp5 */ \ | |
187 | case 23: /* fp6 */ \ | |
188 | case 24: /* fp7 */ \ | |
189 | case 25: /* fp8 */ \ | |
190 | case 26: /* fp9 */ \ | |
191 | case 27: /* fp10 */ \ | |
192 | case 28: /* fp11 */ \ | |
193 | case 29: /* fp12 */ \ | |
194 | case 30: /* fp13 */ \ | |
195 | case 31: /* fp14 */ \ | |
196 | case 32: /* fp15 */ \ | |
197 | case 33: /* fp16 */ \ | |
198 | case 34: /* fp17 */ \ | |
199 | case 35: /* fp18 */ \ | |
200 | case 36: /* fp19 */ \ | |
201 | case 37: /* fp20 */ \ | |
202 | case 38: /* fp21 */ \ | |
203 | case 39: /* fp22 */ \ | |
204 | case 40: /* fp23 */ \ | |
205 | case 41: /* fp24 */ \ | |
206 | case 42: /* fp25 */ \ | |
207 | case 43: /* fp26 */ \ | |
208 | case 44: /* fp27 */ \ | |
209 | case 45: /* fp28 */ \ | |
210 | case 46: /* fp29 */ \ | |
211 | case 47: /* fp30 */ \ | |
212 | case 48: /* fp31 */ \ | |
213 | addr = ((int) &foo.u_fpasave.fpa_regs[(regno)-18] - (int)&foo); \ | |
214 | } \ | |
215 | } | |
216 | ||
217 | /* Total amount of space needed to store our copies of the machine's | |
218 | register state, the array `registers'. 10 i*86 registers, 8 i387 | |
219 | registers, and 31 Weitek 1167 registers */ | |
220 | ||
221 | #undef REGISTER_BYTES | |
222 | #define REGISTER_BYTES ((10 * 4) + (8 * 10) + (31 * 4)) | |
223 | ||
224 | /* Index within `registers' of the first byte of the space for | |
225 | register N. */ | |
226 | ||
227 | #undef REGISTER_BYTE | |
228 | #define REGISTER_BYTE(N) \ | |
229 | (((N) < 3) ? ((N) * 4) : \ | |
230 | ((N) < 5) ? ((((N) - 2) * 10) + 2) : \ | |
231 | ((N) < 8) ? ((((N) - 5) * 4) + 32) : \ | |
232 | ((N) < 14) ? ((((N) - 8) * 10) + 44) : \ | |
233 | ((((N) - 14) * 4) + 104)) | |
234 | ||
235 | /* Number of bytes of storage in the actual machine representation | |
236 | * for register N. All registers are 4 bytes, except 387 st(0) - st(7), | |
237 | * which are 80 bits each. | |
238 | */ | |
239 | ||
240 | #undef REGISTER_RAW_SIZE | |
241 | #define REGISTER_RAW_SIZE(N) \ | |
242 | (((N) < 3) ? 4 : \ | |
243 | ((N) < 5) ? 10 : \ | |
244 | ((N) < 8) ? 4 : \ | |
245 | ((N) < 14) ? 10 : \ | |
246 | 4) | |
247 | ||
248 | /* Nonzero if register N requires conversion | |
249 | from raw format to virtual format. */ | |
250 | ||
251 | #undef REGISTER_CONVERTIBLE | |
252 | #define REGISTER_CONVERTIBLE(N) \ | |
253 | (((N) < 3) ? 0 : \ | |
254 | ((N) < 5) ? 1 : \ | |
255 | ((N) < 8) ? 0 : \ | |
256 | ((N) < 14) ? 1 : \ | |
257 | 0) | |
258 | ||
259 | #include "floatformat.h" | |
260 | ||
261 | /* Convert data from raw format for register REGNUM in buffer FROM | |
262 | to virtual format with type TYPE in buffer TO. */ | |
263 | ||
264 | #undef REGISTER_CONVERT_TO_VIRTUAL | |
265 | #define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,TYPE,FROM,TO) \ | |
266 | { \ | |
267 | double val; \ | |
268 | floatformat_to_double (&floatformat_i387_ext, (FROM), &val); \ | |
269 | store_floating ((TO), TYPE_LENGTH (TYPE), val); \ | |
270 | } | |
271 | ||
272 | /* Convert data from virtual format with type TYPE in buffer FROM | |
273 | to raw format for register REGNUM in buffer TO. */ | |
274 | ||
275 | #undef REGISTER_CONVERT_TO_RAW | |
276 | #define REGISTER_CONVERT_TO_RAW(TYPE,REGNUM,FROM,TO) \ | |
277 | { \ | |
278 | double val = extract_floating ((FROM), TYPE_LENGTH (TYPE)); \ | |
279 | floatformat_from_double (&floatformat_i387_ext, &val, (TO)); \ | |
280 | } | |
281 | ||
282 | /* Return the GDB type object for the "standard" data type | |
283 | of data in register N. */ | |
284 | ||
285 | #undef REGISTER_VIRTUAL_TYPE | |
286 | #define REGISTER_VIRTUAL_TYPE(N) \ | |
287 | ((N < 3) ? builtin_type_int : \ | |
288 | (N < 5) ? builtin_type_double : \ | |
289 | (N < 8) ? builtin_type_int : \ | |
290 | (N < 14) ? builtin_type_double : \ | |
291 | builtin_type_int) | |
292 | ||
293 | /* Store the address of the place in which to copy the structure the | |
294 | subroutine will return. This is called from call_function. | |
295 | Native cc passes the address in eax, gcc (up to version 2.5.8) | |
296 | passes it on the stack. gcc should be fixed in future versions to | |
297 | adopt native cc conventions. */ | |
298 | ||
299 | #undef STORE_STRUCT_RETURN | |
300 | #define STORE_STRUCT_RETURN(ADDR, SP) write_register(0, (ADDR)) | |
301 | ||
302 | /* Extract from an array REGBUF containing the (raw) register state | |
303 | a function return value of type TYPE, and copy that, in virtual format, | |
304 | into VALBUF. */ | |
305 | ||
306 | #undef EXTRACT_RETURN_VALUE | |
307 | #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \ | |
308 | symmetry_extract_return_value(TYPE, REGBUF, VALBUF) | |
309 | ||
310 | /* The following redefines make backtracing through sigtramp work. | |
311 | They manufacture a fake sigtramp frame and obtain the saved pc in sigtramp | |
312 | from the sigcontext structure which is pushed by the kernel on the | |
313 | user stack, along with a pointer to it. */ | |
314 | ||
315 | #define IN_SIGTRAMP(pc, name) ((name) && STREQ ("_sigcode", name)) | |
316 | ||
317 | /* Offset to saved PC in sigcontext, from <signal.h>. */ | |
318 | #define SIGCONTEXT_PC_OFFSET 16 | |
319 | ||
320 | #endif /* ifndef TM_SYMMETRY_H */ | |
321 |