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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).
7 This file is part of GDB.
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.
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.
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,
22 Boston, MA 02111-1307, USA. */
25 #define TM_SYMMETRY_H 1
27 /* I don't know if this will work for cross-debugging, even if you do get
28 a copy of the right include file. */
29 #include <machine/reg.h>
31 #include "i386/tm-i386v.h"
33 #undef START_INFERIOR_TRAPS_EXPECTED
34 #define START_INFERIOR_TRAPS_EXPECTED 2
36 /* Amount PC must be decremented by after a breakpoint. This is often the
37 number of bytes in BREAKPOINT but not always (such as now). */
39 #undef DECR_PC_AFTER_BREAK
40 #define DECR_PC_AFTER_BREAK 0
43 /* --- this code can't be used unless we know we are running native,
44 since it uses host specific ptrace calls. */
45 /* code for 80387 fpu. Functions are from i386-dep.c, copied into
48 #define FLOAT_INFO { i386_float_info(); }
51 /* Number of machine registers */
56 /* Initializer for an array of names of registers.
57 There should be NUM_REGS strings in this initializer. */
59 /* Initializer for an array of names of registers. There should be at least
60 NUM_REGS strings in this initializer. Any excess ones are simply ignored.
61 Symmetry registers are in this weird order to match the register numbers
62 in the symbol table entries. If you change the order, things will probably
63 break mysteriously for no apparent reason. Also note that the st(0)...
64 st(7) 387 registers are represented as st0...st7. */
67 #define REGISTER_NAMES { "eax", "edx", "ecx", "st0", "st1", \
68 "ebx", "esi", "edi", "st2", "st3", \
69 "st4", "st5", "st6", "st7", "esp", \
70 "ebp", "eip", "eflags","fp1", "fp2", \
71 "fp3", "fp4", "fp5", "fp6", "fp7", \
72 "fp8", "fp9", "fp10", "fp11", "fp12", \
73 "fp13", "fp14", "fp15", "fp16", "fp17", \
74 "fp18", "fp19", "fp20", "fp21", "fp22", \
75 "fp23", "fp24", "fp25", "fp26", "fp27", \
76 "fp28", "fp29", "fp30", "fp31" }
78 /* Register numbers of various important registers.
79 Note that some of these values are "real" register numbers,
80 and correspond to the general registers of the machine,
81 and some are "phony" register numbers which are too large
82 to be actual register numbers as far as the user is concerned
83 but do serve to get the desired values when passed to read_register. */
101 #define FP1_REGNUM 18 /* first 1167 register */
102 /* Get %fp2 - %fp31 by addition, since they are contiguous */
105 #define SP_REGNUM 14 /* (usp) Contains address of top of stack */
106 #define ESP_REGNUM 14
108 #define FP_REGNUM 15 /* (ebp) Contains address of executing stack frame */
109 #define EBP_REGNUM 15
111 #define PC_REGNUM 16 /* (eip) Contains program counter */
112 #define EIP_REGNUM 16
114 #define PS_REGNUM 17 /* (ps) Contains processor status */
115 #define EFLAGS_REGNUM 17
118 * Following macro translates i386 opcode register numbers to Symmetry
119 * register numbers. This is used by i386_frame_find_saved_regs.
121 * %eax %ecx %edx %ebx %esp %ebp %esi %edi
122 * i386 0 1 2 3 4 5 6 7
123 * Symmetry 0 2 1 5 14 15 6 7
126 #define I386_REGNO_TO_SYMMETRY(n) \
127 ((n)==0?0 :(n)==1?2 :(n)==2?1 :(n)==3?5 :(n)==4?14 :(n)==5?15 :(n))
129 /* The magic numbers below are offsets into u_ar0 in the user struct.
130 * They live in <machine/reg.h>. Gdb calls this macro with blockend
131 * holding u.u_ar0 - KERNEL_U_ADDR. Only the registers listed are
132 * saved in the u area (along with a few others that aren't useful
133 * here. See <machine/reg.h>).
136 #define REGISTER_U_ADDR(addr, blockend, regno) \
137 { struct user foo; /* needed for finding fpu regs */ \
140 addr = blockend + EAX * sizeof(int); break; \
142 addr = blockend + EDX * sizeof(int); break; \
144 addr = blockend + ECX * sizeof(int); break; \
145 case 3: /* st(0) */ \
146 addr = ((int)&foo.u_fpusave.fpu_stack[0][0] - (int)&foo); \
148 case 4: /* st(1) */ \
149 addr = ((int) &foo.u_fpusave.fpu_stack[1][0] - (int)&foo); \
152 addr = blockend + EBX * sizeof(int); break; \
154 addr = blockend + ESI * sizeof(int); break; \
156 addr = blockend + EDI * sizeof(int); break; \
157 case 8: /* st(2) */ \
158 addr = ((int) &foo.u_fpusave.fpu_stack[2][0] - (int)&foo); \
160 case 9: /* st(3) */ \
161 addr = ((int) &foo.u_fpusave.fpu_stack[3][0] - (int)&foo); \
163 case 10: /* st(4) */ \
164 addr = ((int) &foo.u_fpusave.fpu_stack[4][0] - (int)&foo); \
166 case 11: /* st(5) */ \
167 addr = ((int) &foo.u_fpusave.fpu_stack[5][0] - (int)&foo); \
169 case 12: /* st(6) */ \
170 addr = ((int) &foo.u_fpusave.fpu_stack[6][0] - (int)&foo); \
172 case 13: /* st(7) */ \
173 addr = ((int) &foo.u_fpusave.fpu_stack[7][0] - (int)&foo); \
176 addr = blockend + ESP * sizeof(int); break; \
178 addr = blockend + EBP * sizeof(int); break; \
180 addr = blockend + EIP * sizeof(int); break; \
182 addr = blockend + FLAGS * sizeof(int); break; \
192 case 27: /* fp10 */ \
193 case 28: /* fp11 */ \
194 case 29: /* fp12 */ \
195 case 30: /* fp13 */ \
196 case 31: /* fp14 */ \
197 case 32: /* fp15 */ \
198 case 33: /* fp16 */ \
199 case 34: /* fp17 */ \
200 case 35: /* fp18 */ \
201 case 36: /* fp19 */ \
202 case 37: /* fp20 */ \
203 case 38: /* fp21 */ \
204 case 39: /* fp22 */ \
205 case 40: /* fp23 */ \
206 case 41: /* fp24 */ \
207 case 42: /* fp25 */ \
208 case 43: /* fp26 */ \
209 case 44: /* fp27 */ \
210 case 45: /* fp28 */ \
211 case 46: /* fp29 */ \
212 case 47: /* fp30 */ \
213 case 48: /* fp31 */ \
214 addr = ((int) &foo.u_fpasave.fpa_regs[(regno)-18] - (int)&foo); \
218 /* Total amount of space needed to store our copies of the machine's
219 register state, the array `registers'. 10 i*86 registers, 8 i387
220 registers, and 31 Weitek 1167 registers */
222 #undef REGISTER_BYTES
223 #define REGISTER_BYTES ((10 * 4) + (8 * 10) + (31 * 4))
225 /* Index within `registers' of the first byte of the space for
229 #define REGISTER_BYTE(N) \
230 (((N) < 3) ? ((N) * 4) : \
231 ((N) < 5) ? ((((N) - 2) * 10) + 2) : \
232 ((N) < 8) ? ((((N) - 5) * 4) + 32) : \
233 ((N) < 14) ? ((((N) - 8) * 10) + 44) : \
234 ((((N) - 14) * 4) + 104))
236 /* Number of bytes of storage in the actual machine representation
237 * for register N. All registers are 4 bytes, except 387 st(0) - st(7),
238 * which are 80 bits each.
241 #undef REGISTER_RAW_SIZE
242 #define REGISTER_RAW_SIZE(N) \
249 /* Nonzero if register N requires conversion
250 from raw format to virtual format. */
252 #undef REGISTER_CONVERTIBLE
253 #define REGISTER_CONVERTIBLE(N) \
260 #include "floatformat.h"
262 /* Convert data from raw format for register REGNUM in buffer FROM
263 to virtual format with type TYPE in buffer TO. */
265 #undef REGISTER_CONVERT_TO_VIRTUAL
266 #define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,TYPE,FROM,TO) \
269 floatformat_to_double (&floatformat_i387_ext, (FROM), &val); \
270 store_floating ((TO), TYPE_LENGTH (TYPE), val); \
273 /* Convert data from virtual format with type TYPE in buffer FROM
274 to raw format for register REGNUM in buffer TO. */
276 #undef REGISTER_CONVERT_TO_RAW
277 #define REGISTER_CONVERT_TO_RAW(TYPE,REGNUM,FROM,TO) \
279 double val = extract_floating ((FROM), TYPE_LENGTH (TYPE)); \
280 floatformat_from_double (&floatformat_i387_ext, &val, (TO)); \
283 /* Return the GDB type object for the "standard" data type
284 of data in register N. */
286 #undef REGISTER_VIRTUAL_TYPE
287 #define REGISTER_VIRTUAL_TYPE(N) \
288 ((N < 3) ? builtin_type_int : \
289 (N < 5) ? builtin_type_double : \
290 (N < 8) ? builtin_type_int : \
291 (N < 14) ? builtin_type_double : \
294 /* Store the address of the place in which to copy the structure the
295 subroutine will return. This is called from call_function.
296 Native cc passes the address in eax, gcc (up to version 2.5.8)
297 passes it on the stack. gcc should be fixed in future versions to
298 adopt native cc conventions. */
300 #undef STORE_STRUCT_RETURN
301 #define STORE_STRUCT_RETURN(ADDR, SP) write_register(0, (ADDR))
303 /* Extract from an array REGBUF containing the (raw) register state
304 a function return value of type TYPE, and copy that, in virtual format,
307 #undef EXTRACT_RETURN_VALUE
308 #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
309 symmetry_extract_return_value(TYPE, REGBUF, VALBUF)
311 /* The following redefines make backtracing through sigtramp work.
312 They manufacture a fake sigtramp frame and obtain the saved pc in sigtramp
313 from the sigcontext structure which is pushed by the kernel on the
314 user stack, along with a pointer to it. */
316 #define IN_SIGTRAMP(pc, name) ((name) && STREQ ("_sigcode", name))
318 /* Offset to saved PC in sigcontext, from <signal.h>. */
319 #define SIGCONTEXT_PC_OFFSET 16
321 #endif /* ifndef TM_SYMMETRY_H */