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, Boston, MA 02111-1307, USA. */
24 #define TM_SYMMETRY_H 1
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>
30 #include "i386/tm-i386v.h"
32 #undef START_INFERIOR_TRAPS_EXPECTED
33 #define START_INFERIOR_TRAPS_EXPECTED 2
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). */
38 #undef DECR_PC_AFTER_BREAK
39 #define DECR_PC_AFTER_BREAK 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
47 #define FLOAT_INFO { i386_float_info(); }
50 /* Number of machine registers */
55 /* Initializer for an array of names of registers.
56 There should be NUM_REGS strings in this initializer. */
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. */
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" }
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. */
100 #define FP1_REGNUM 18 /* first 1167 register */
101 /* Get %fp2 - %fp31 by addition, since they are contiguous */
104 #define SP_REGNUM 14 /* (usp) Contains address of top of stack */
105 #define ESP_REGNUM 14
107 #define FP_REGNUM 15 /* (ebp) Contains address of executing stack frame */
108 #define EBP_REGNUM 15
110 #define PC_REGNUM 16 /* (eip) Contains program counter */
111 #define EIP_REGNUM 16
113 #define PS_REGNUM 17 /* (ps) Contains processor status */
114 #define EFLAGS_REGNUM 17
117 * Following macro translates i386 opcode register numbers to Symmetry
118 * register numbers. This is used by i386_frame_find_saved_regs.
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
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))
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>).
135 #define REGISTER_U_ADDR(addr, blockend, regno) \
136 { struct user foo; /* needed for finding fpu regs */ \
139 addr = blockend + EAX * sizeof(int); break; \
141 addr = blockend + EDX * sizeof(int); break; \
143 addr = blockend + ECX * sizeof(int); break; \
144 case 3: /* st(0) */ \
145 addr = ((int)&foo.u_fpusave.fpu_stack[0][0] - (int)&foo); \
147 case 4: /* st(1) */ \
148 addr = ((int) &foo.u_fpusave.fpu_stack[1][0] - (int)&foo); \
151 addr = blockend + EBX * sizeof(int); break; \
153 addr = blockend + ESI * sizeof(int); break; \
155 addr = blockend + EDI * sizeof(int); break; \
156 case 8: /* st(2) */ \
157 addr = ((int) &foo.u_fpusave.fpu_stack[2][0] - (int)&foo); \
159 case 9: /* st(3) */ \
160 addr = ((int) &foo.u_fpusave.fpu_stack[3][0] - (int)&foo); \
162 case 10: /* st(4) */ \
163 addr = ((int) &foo.u_fpusave.fpu_stack[4][0] - (int)&foo); \
165 case 11: /* st(5) */ \
166 addr = ((int) &foo.u_fpusave.fpu_stack[5][0] - (int)&foo); \
168 case 12: /* st(6) */ \
169 addr = ((int) &foo.u_fpusave.fpu_stack[6][0] - (int)&foo); \
171 case 13: /* st(7) */ \
172 addr = ((int) &foo.u_fpusave.fpu_stack[7][0] - (int)&foo); \
175 addr = blockend + ESP * sizeof(int); break; \
177 addr = blockend + EBP * sizeof(int); break; \
179 addr = blockend + EIP * sizeof(int); break; \
181 addr = blockend + FLAGS * sizeof(int); break; \
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); \
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 */
221 #undef REGISTER_BYTES
222 #define REGISTER_BYTES ((10 * 4) + (8 * 10) + (31 * 4))
224 /* Index within `registers' of the first byte of the space for
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))
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.
240 #undef REGISTER_RAW_SIZE
241 #define REGISTER_RAW_SIZE(N) \
248 /* Nonzero if register N requires conversion
249 from raw format to virtual format. */
251 #undef REGISTER_CONVERTIBLE
252 #define REGISTER_CONVERTIBLE(N) \
259 #include "floatformat.h"
261 /* Convert data from raw format for register REGNUM in buffer FROM
262 to virtual format with type TYPE in buffer TO. */
264 #undef REGISTER_CONVERT_TO_VIRTUAL
265 #define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,TYPE,FROM,TO) \
268 floatformat_to_double (&floatformat_i387_ext, (FROM), &val); \
269 store_floating ((TO), TYPE_LENGTH (TYPE), val); \
272 /* Convert data from virtual format with type TYPE in buffer FROM
273 to raw format for register REGNUM in buffer TO. */
275 #undef REGISTER_CONVERT_TO_RAW
276 #define REGISTER_CONVERT_TO_RAW(TYPE,REGNUM,FROM,TO) \
278 double val = extract_floating ((FROM), TYPE_LENGTH (TYPE)); \
279 floatformat_from_double (&floatformat_i387_ext, &val, (TO)); \
282 /* Return the GDB type object for the "standard" data type
283 of data in register N. */
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 : \
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. */
299 #undef STORE_STRUCT_RETURN
300 #define STORE_STRUCT_RETURN(ADDR, SP) write_register(0, (ADDR))
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,
306 #undef EXTRACT_RETURN_VALUE
307 #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
308 symmetry_extract_return_value(TYPE, REGBUF, VALBUF)
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. */
315 #define IN_SIGTRAMP(pc, name) ((name) && STREQ ("_sigcode", name))
317 /* Offset to saved PC in sigcontext, from <signal.h>. */
318 #define SIGCONTEXT_PC_OFFSET 16
320 #endif /* ifndef TM_SYMMETRY_H */
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