1 /* Low level interface to valgrind, for the remote server for GDB integrated
2 in valgrind.
3 Copyright (C) 2011
4 Free Software Foundation, Inc.
5
6 This file is part of VALGRIND.
7 It has been inspired from a file from gdbserver in gdb 6.6.
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., 51 Franklin Street, Fifth Floor,
22 Boston, MA 02110-1301, USA. */
23
24 #include "server.h"
25 #include "target.h"
26 #include "regdef.h"
27 #include "regcache.h"
28
29 #include "pub_core_machine.h"
30 #include "pub_core_threadstate.h"
31 #include "pub_core_transtab.h"
32 #include "pub_core_gdbserver.h"
33
34 #include "valgrind_low.h"
35
36 #include "libvex_guest_ppc32.h"
37
38 /* this is only the basic set of registers.
39 Need to look at what is the exact ppc32 model to support.
40 */
41 static struct reg regs[] = {
42 { "r0", 0, 32 },
43 { "r1", 32, 32 },
44 { "r2", 64, 32 },
45 { "r3", 96, 32 },
46 { "r4", 128, 32 },
47 { "r5", 160, 32 },
48 { "r6", 192, 32 },
49 { "r7", 224, 32 },
50 { "r8", 256, 32 },
51 { "r9", 288, 32 },
52 { "r10", 320, 32 },
53 { "r11", 352, 32 },
54 { "r12", 384, 32 },
55 { "r13", 416, 32 },
56 { "r14", 448, 32 },
57 { "r15", 480, 32 },
58 { "r16", 512, 32 },
59 { "r17", 544, 32 },
60 { "r18", 576, 32 },
61 { "r19", 608, 32 },
62 { "r20", 640, 32 },
63 { "r21", 672, 32 },
64 { "r22", 704, 32 },
65 { "r23", 736, 32 },
66 { "r24", 768, 32 },
67 { "r25", 800, 32 },
68 { "r26", 832, 32 },
69 { "r27", 864, 32 },
70 { "r28", 896, 32 },
71 { "r29", 928, 32 },
72 { "r30", 960, 32 },
73 { "r31", 992, 32 },
74 { "f0", 1024, 64 },
75 { "f1", 1088, 64 },
76 { "f2", 1152, 64 },
77 { "f3", 1216, 64 },
78 { "f4", 1280, 64 },
79 { "f5", 1344, 64 },
80 { "f6", 1408, 64 },
81 { "f7", 1472, 64 },
82 { "f8", 1536, 64 },
83 { "f9", 1600, 64 },
84 { "f10", 1664, 64 },
85 { "f11", 1728, 64 },
86 { "f12", 1792, 64 },
87 { "f13", 1856, 64 },
88 { "f14", 1920, 64 },
89 { "f15", 1984, 64 },
90 { "f16", 2048, 64 },
91 { "f17", 2112, 64 },
92 { "f18", 2176, 64 },
93 { "f19", 2240, 64 },
94 { "f20", 2304, 64 },
95 { "f21", 2368, 64 },
96 { "f22", 2432, 64 },
97 { "f23", 2496, 64 },
98 { "f24", 2560, 64 },
99 { "f25", 2624, 64 },
100 { "f26", 2688, 64 },
101 { "f27", 2752, 64 },
102 { "f28", 2816, 64 },
103 { "f29", 2880, 64 },
104 { "f30", 2944, 64 },
105 { "f31", 3008, 64 },
106 { "pc", 3072, 32 },
107 { "msr", 3104, 32 },
108 { "cr", 3136, 32 },
109 { "lr", 3168, 32 },
110 { "ctr", 3200, 32 },
111 { "xer", 3232, 32 },
112 { "fpscr", 3264, 32 },
113 { "orig_r3", 3296, 32 },
114 { "trap", 3328, 32 },
115 { "vr0", 3360, 128 },
116 { "vr1", 3488, 128 },
117 { "vr2", 3616, 128 },
118 { "vr3", 3744, 128 },
119 { "vr4", 3872, 128 },
120 { "vr5", 4000, 128 },
121 { "vr6", 4128, 128 },
122 { "vr7", 4256, 128 },
123 { "vr8", 4384, 128 },
124 { "vr9", 4512, 128 },
125 { "vr10", 4640, 128 },
126 { "vr11", 4768, 128 },
127 { "vr12", 4896, 128 },
128 { "vr13", 5024, 128 },
129 { "vr14", 5152, 128 },
130 { "vr15", 5280, 128 },
131 { "vr16", 5408, 128 },
132 { "vr17", 5536, 128 },
133 { "vr18", 5664, 128 },
134 { "vr19", 5792, 128 },
135 { "vr20", 5920, 128 },
136 { "vr21", 6048, 128 },
137 { "vr22", 6176, 128 },
138 { "vr23", 6304, 128 },
139 { "vr24", 6432, 128 },
140 { "vr25", 6560, 128 },
141 { "vr26", 6688, 128 },
142 { "vr27", 6816, 128 },
143 { "vr28", 6944, 128 },
144 { "vr29", 7072, 128 },
145 { "vr30", 7200, 128 },
146 { "vr31", 7328, 128 },
147 { "vscr", 7456, 32 },
148 { "vrsave", 7488, 32 }
149 };
150 static const char *expedite_regs[] = { "r1", "pc", 0 };
151 #define num_regs (sizeof (regs) / sizeof (regs[0]))
152
153 static
get_pc(void)154 CORE_ADDR get_pc (void)
155 {
156 unsigned long pc;
157
158 collect_register_by_name ("pc", &pc);
159
160 dlog(1, "stop pc is %p\n", (void *) pc);
161 return pc;
162 }
163
164 static
set_pc(CORE_ADDR newpc)165 void set_pc (CORE_ADDR newpc)
166 {
167 Bool mod;
168 supply_register_by_name ("pc", &newpc, &mod);
169 if (mod)
170 dlog(1, "set pc to %p\n", C2v (newpc));
171 else
172 dlog(1, "set pc not changed %p\n", C2v (newpc));
173 }
174
175 /* store registers in the guest state (gdbserver_to_valgrind)
176 or fetch register from the guest state (valgrind_to_gdbserver). */
177 static
transfer_register(ThreadId tid,int abs_regno,void * buf,transfer_direction dir,int size,Bool * mod)178 void transfer_register (ThreadId tid, int abs_regno, void * buf,
179 transfer_direction dir, int size, Bool *mod)
180 {
181 ThreadState* tst = VG_(get_ThreadState)(tid);
182 int set = abs_regno / num_regs;
183 int regno = abs_regno % num_regs;
184 *mod = False;
185
186 VexGuestPPC32State* ppc32 = (VexGuestPPC32State*) get_arch (set, tst);
187
188 switch (regno) {
189 // numbers here have to match the order of regs above
190 // Attention: gdb order does not match valgrind order.
191 case 0: VG_(transfer) (&ppc32->guest_GPR0, buf, dir, size, mod); break;
192 case 1: VG_(transfer) (&ppc32->guest_GPR1, buf, dir, size, mod); break;
193 case 2: VG_(transfer) (&ppc32->guest_GPR2, buf, dir, size, mod); break;
194 case 3: VG_(transfer) (&ppc32->guest_GPR3, buf, dir, size, mod); break;
195 case 4: VG_(transfer) (&ppc32->guest_GPR4, buf, dir, size, mod); break;
196 case 5: VG_(transfer) (&ppc32->guest_GPR5, buf, dir, size, mod); break;
197 case 6: VG_(transfer) (&ppc32->guest_GPR6, buf, dir, size, mod); break;
198 case 7: VG_(transfer) (&ppc32->guest_GPR7, buf, dir, size, mod); break;
199 case 8: VG_(transfer) (&ppc32->guest_GPR8, buf, dir, size, mod); break;
200 case 9: VG_(transfer) (&ppc32->guest_GPR9, buf, dir, size, mod); break;
201 case 10: VG_(transfer) (&ppc32->guest_GPR10, buf, dir, size, mod); break;
202 case 11: VG_(transfer) (&ppc32->guest_GPR11, buf, dir, size, mod); break;
203 case 12: VG_(transfer) (&ppc32->guest_GPR12, buf, dir, size, mod); break;
204 case 13: VG_(transfer) (&ppc32->guest_GPR13, buf, dir, size, mod); break;
205 case 14: VG_(transfer) (&ppc32->guest_GPR14, buf, dir, size, mod); break;
206 case 15: VG_(transfer) (&ppc32->guest_GPR15, buf, dir, size, mod); break;
207 case 16: VG_(transfer) (&ppc32->guest_GPR16, buf, dir, size, mod); break;
208 case 17: VG_(transfer) (&ppc32->guest_GPR17, buf, dir, size, mod); break;
209 case 18: VG_(transfer) (&ppc32->guest_GPR18, buf, dir, size, mod); break;
210 case 19: VG_(transfer) (&ppc32->guest_GPR19, buf, dir, size, mod); break;
211 case 20: VG_(transfer) (&ppc32->guest_GPR20, buf, dir, size, mod); break;
212 case 21: VG_(transfer) (&ppc32->guest_GPR21, buf, dir, size, mod); break;
213 case 22: VG_(transfer) (&ppc32->guest_GPR22, buf, dir, size, mod); break;
214 case 23: VG_(transfer) (&ppc32->guest_GPR23, buf, dir, size, mod); break;
215 case 24: VG_(transfer) (&ppc32->guest_GPR24, buf, dir, size, mod); break;
216 case 25: VG_(transfer) (&ppc32->guest_GPR25, buf, dir, size, mod); break;
217 case 26: VG_(transfer) (&ppc32->guest_GPR26, buf, dir, size, mod); break;
218 case 27: VG_(transfer) (&ppc32->guest_GPR27, buf, dir, size, mod); break;
219 case 28: VG_(transfer) (&ppc32->guest_GPR28, buf, dir, size, mod); break;
220 case 29: VG_(transfer) (&ppc32->guest_GPR29, buf, dir, size, mod); break;
221 case 30: VG_(transfer) (&ppc32->guest_GPR30, buf, dir, size, mod); break;
222 case 31: VG_(transfer) (&ppc32->guest_GPR31, buf, dir, size, mod); break;
223 case 32: VG_(transfer) (&ppc32->guest_VSR0, buf, dir, size, mod); break;
224 case 33: VG_(transfer) (&ppc32->guest_VSR1, buf, dir, size, mod); break;
225 case 34: VG_(transfer) (&ppc32->guest_VSR2, buf, dir, size, mod); break;
226 case 35: VG_(transfer) (&ppc32->guest_VSR3, buf, dir, size, mod); break;
227 case 36: VG_(transfer) (&ppc32->guest_VSR4, buf, dir, size, mod); break;
228 case 37: VG_(transfer) (&ppc32->guest_VSR5, buf, dir, size, mod); break;
229 case 38: VG_(transfer) (&ppc32->guest_VSR6, buf, dir, size, mod); break;
230 case 39: VG_(transfer) (&ppc32->guest_VSR7, buf, dir, size, mod); break;
231 case 40: VG_(transfer) (&ppc32->guest_VSR8, buf, dir, size, mod); break;
232 case 41: VG_(transfer) (&ppc32->guest_VSR9, buf, dir, size, mod); break;
233 case 42: VG_(transfer) (&ppc32->guest_VSR10, buf, dir, size, mod); break;
234 case 43: VG_(transfer) (&ppc32->guest_VSR11, buf, dir, size, mod); break;
235 case 44: VG_(transfer) (&ppc32->guest_VSR12, buf, dir, size, mod); break;
236 case 45: VG_(transfer) (&ppc32->guest_VSR13, buf, dir, size, mod); break;
237 case 46: VG_(transfer) (&ppc32->guest_VSR14, buf, dir, size, mod); break;
238 case 47: VG_(transfer) (&ppc32->guest_VSR15, buf, dir, size, mod); break;
239 case 48: VG_(transfer) (&ppc32->guest_VSR16, buf, dir, size, mod); break;
240 case 49: VG_(transfer) (&ppc32->guest_VSR17, buf, dir, size, mod); break;
241 case 50: VG_(transfer) (&ppc32->guest_VSR18, buf, dir, size, mod); break;
242 case 51: VG_(transfer) (&ppc32->guest_VSR19, buf, dir, size, mod); break;
243 case 52: VG_(transfer) (&ppc32->guest_VSR20, buf, dir, size, mod); break;
244 case 53: VG_(transfer) (&ppc32->guest_VSR21, buf, dir, size, mod); break;
245 case 54: VG_(transfer) (&ppc32->guest_VSR22, buf, dir, size, mod); break;
246 case 55: VG_(transfer) (&ppc32->guest_VSR23, buf, dir, size, mod); break;
247 case 56: VG_(transfer) (&ppc32->guest_VSR24, buf, dir, size, mod); break;
248 case 57: VG_(transfer) (&ppc32->guest_VSR25, buf, dir, size, mod); break;
249 case 58: VG_(transfer) (&ppc32->guest_VSR26, buf, dir, size, mod); break;
250 case 59: VG_(transfer) (&ppc32->guest_VSR27, buf, dir, size, mod); break;
251 case 60: VG_(transfer) (&ppc32->guest_VSR28, buf, dir, size, mod); break;
252 case 61: VG_(transfer) (&ppc32->guest_VSR29, buf, dir, size, mod); break;
253 case 62: VG_(transfer) (&ppc32->guest_VSR30, buf, dir, size, mod); break;
254 case 63: VG_(transfer) (&ppc32->guest_VSR31, buf, dir, size, mod); break;
255 case 64: VG_(transfer) (&ppc32->guest_CIA, buf, dir, size, mod); break;
256 case 65: *mod = False; break; // VEX does not model Machine State Register
257 case 66: {
258 UInt cr = LibVEX_GuestPPC32_get_CR (ppc32);
259 if (dir == valgrind_to_gdbserver) {
260 VG_(transfer) (&cr, buf, dir, size, mod);
261 } else {
262 UInt newcr;
263 VG_(transfer) (&newcr, buf, dir, size, mod);
264 *mod = newcr != cr;
265 LibVEX_GuestPPC32_put_CR (newcr, ppc32);
266 }
267 break;
268 }
269 case 67: VG_(transfer) (&ppc32->guest_LR, buf, dir, size, mod); break;
270 case 68: VG_(transfer) (&ppc32->guest_CTR, buf, dir, size, mod); break;
271 case 69: {
272 UInt xer = LibVEX_GuestPPC32_get_XER (ppc32);
273 if (dir == valgrind_to_gdbserver) {
274 VG_(transfer) (&xer, buf, dir, size, mod);
275 } else {
276 UInt newxer;
277 VG_(transfer) (&newxer, buf, dir, size, mod);
278 *mod = newxer != xer;
279 LibVEX_GuestPPC32_put_XER (newxer, ppc32);
280 }
281 break;
282 }
283 case 70: VG_(transfer) (&ppc32->guest_FPROUND, buf, dir, size, mod); break;
284 case 71: *mod = False; break; // GDBTD???? VEX { "orig_r3", 3296, 32 },
285 case 72: *mod = False; break; // GDBTD???? VEX { "trap", 3328, 32 },
286 case 73: VG_(transfer) (&ppc32->guest_VSR32, buf, dir, size, mod); break;
287 case 74: VG_(transfer) (&ppc32->guest_VSR33, buf, dir, size, mod); break;
288 case 75: VG_(transfer) (&ppc32->guest_VSR34, buf, dir, size, mod); break;
289 case 76: VG_(transfer) (&ppc32->guest_VSR35, buf, dir, size, mod); break;
290 case 77: VG_(transfer) (&ppc32->guest_VSR36, buf, dir, size, mod); break;
291 case 78: VG_(transfer) (&ppc32->guest_VSR37, buf, dir, size, mod); break;
292 case 79: VG_(transfer) (&ppc32->guest_VSR38, buf, dir, size, mod); break;
293 case 80: VG_(transfer) (&ppc32->guest_VSR39, buf, dir, size, mod); break;
294 case 81: VG_(transfer) (&ppc32->guest_VSR40, buf, dir, size, mod); break;
295 case 82: VG_(transfer) (&ppc32->guest_VSR41, buf, dir, size, mod); break;
296 case 83: VG_(transfer) (&ppc32->guest_VSR42, buf, dir, size, mod); break;
297 case 84: VG_(transfer) (&ppc32->guest_VSR43, buf, dir, size, mod); break;
298 case 85: VG_(transfer) (&ppc32->guest_VSR44, buf, dir, size, mod); break;
299 case 86: VG_(transfer) (&ppc32->guest_VSR45, buf, dir, size, mod); break;
300 case 87: VG_(transfer) (&ppc32->guest_VSR46, buf, dir, size, mod); break;
301 case 88: VG_(transfer) (&ppc32->guest_VSR47, buf, dir, size, mod); break;
302 case 89: VG_(transfer) (&ppc32->guest_VSR48, buf, dir, size, mod); break;
303 case 90: VG_(transfer) (&ppc32->guest_VSR49, buf, dir, size, mod); break;
304 case 91: VG_(transfer) (&ppc32->guest_VSR50, buf, dir, size, mod); break;
305 case 92: VG_(transfer) (&ppc32->guest_VSR51, buf, dir, size, mod); break;
306 case 93: VG_(transfer) (&ppc32->guest_VSR52, buf, dir, size, mod); break;
307 case 94: VG_(transfer) (&ppc32->guest_VSR53, buf, dir, size, mod); break;
308 case 95: VG_(transfer) (&ppc32->guest_VSR54, buf, dir, size, mod); break;
309 case 96: VG_(transfer) (&ppc32->guest_VSR55, buf, dir, size, mod); break;
310 case 97: VG_(transfer) (&ppc32->guest_VSR56, buf, dir, size, mod); break;
311 case 98: VG_(transfer) (&ppc32->guest_VSR57, buf, dir, size, mod); break;
312 case 99: VG_(transfer) (&ppc32->guest_VSR58, buf, dir, size, mod); break;
313 case 100: VG_(transfer) (&ppc32->guest_VSR59, buf, dir, size, mod); break;
314 case 101: VG_(transfer) (&ppc32->guest_VSR60, buf, dir, size, mod); break;
315 case 102: VG_(transfer) (&ppc32->guest_VSR61, buf, dir, size, mod); break;
316 case 103: VG_(transfer) (&ppc32->guest_VSR62, buf, dir, size, mod); break;
317 case 104: VG_(transfer) (&ppc32->guest_VSR63, buf, dir, size, mod); break;
318 case 105: VG_(transfer) (&ppc32->guest_VSCR, buf, dir, size, mod); break;
319 case 106: VG_(transfer) (&ppc32->guest_VRSAVE, buf, dir, size, mod); break;
320 default: vg_assert(0);
321 }
322 }
323
324 static
target_xml(Bool shadow_mode)325 const char* target_xml (Bool shadow_mode)
326 {
327 if (shadow_mode) {
328 return "powerpc-altivec32l-valgrind.xml";
329 } else {
330 return "powerpc-altivec32l.xml";
331 }
332 }
333
target_get_dtv(ThreadState * tst)334 static CORE_ADDR** target_get_dtv (ThreadState *tst)
335 {
336 VexGuestPPC32State* ppc32 = (VexGuestPPC32State*)&tst->arch.vex;
337 // ppc32 dtv is located just before the tcb, which is 0x7000 before
338 // the thread id (r2)
339 return (CORE_ADDR**)((CORE_ADDR)ppc32->guest_GPR2
340 - 0x7000 - sizeof(CORE_ADDR));
341 }
342
343 static struct valgrind_target_ops low_target = {
344 num_regs,
345 regs,
346 1, //r1
347 transfer_register,
348 get_pc,
349 set_pc,
350 "ppc32",
351 target_xml,
352 target_get_dtv
353 };
354
ppc32_init_architecture(struct valgrind_target_ops * target)355 void ppc32_init_architecture (struct valgrind_target_ops *target)
356 {
357 *target = low_target;
358 set_register_cache (regs, num_regs);
359 gdbserver_expedite_regs = expedite_regs;
360 }
361
362