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_s390x.h"
37
38 static struct reg regs[] = {
39 { "pswm", 0, 64 },
40 { "pswa", 64, 64 },
41 { "r0", 128, 64 },
42 { "r1", 192, 64 },
43 { "r2", 256, 64 },
44 { "r3", 320, 64 },
45 { "r4", 384, 64 },
46 { "r5", 448, 64 },
47 { "r6", 512, 64 },
48 { "r7", 576, 64 },
49 { "r8", 640, 64 },
50 { "r9", 704, 64 },
51 { "r10", 768, 64 },
52 { "r11", 832, 64 },
53 { "r12", 896, 64 },
54 { "r13", 960, 64 },
55 { "r14", 1024, 64 },
56 { "r15", 1088, 64 },
57 { "acr0", 1152, 32 },
58 { "acr1", 1184, 32 },
59 { "acr2", 1216, 32 },
60 { "acr3", 1248, 32 },
61 { "acr4", 1280, 32 },
62 { "acr5", 1312, 32 },
63 { "acr6", 1344, 32 },
64 { "acr7", 1376, 32 },
65 { "acr8", 1408, 32 },
66 { "acr9", 1440, 32 },
67 { "acr10", 1472, 32 },
68 { "acr11", 1504, 32 },
69 { "acr12", 1536, 32 },
70 { "acr13", 1568, 32 },
71 { "acr14", 1600, 32 },
72 { "acr15", 1632, 32 },
73 { "fpc", 1664, 32 },
74 { "f0", 1696, 64 },
75 { "f1", 1760, 64 },
76 { "f2", 1824, 64 },
77 { "f3", 1888, 64 },
78 { "f4", 1952, 64 },
79 { "f5", 2016, 64 },
80 { "f6", 2080, 64 },
81 { "f7", 2144, 64 },
82 { "f8", 2208, 64 },
83 { "f9", 2272, 64 },
84 { "f10", 2336, 64 },
85 { "f11", 2400, 64 },
86 { "f12", 2464, 64 },
87 { "f13", 2528, 64 },
88 { "f14", 2592, 64 },
89 { "f15", 2656, 64 },
90 { "orig_r2", 2720, 64 },
91 };
92 static const char *expedite_regs[] = { "r14", "r15", "pswa", 0 };
93 #define num_regs (sizeof (regs) / sizeof (regs[0]))
94
95 static
get_pc(void)96 CORE_ADDR get_pc (void)
97 {
98 unsigned long pc;
99
100 collect_register_by_name ("pswa", &pc);
101
102 dlog(1, "stop pc is %p\n", (void *) pc);
103 return pc;
104 }
105
106 static
set_pc(CORE_ADDR newpc)107 void set_pc (CORE_ADDR newpc)
108 {
109 Bool mod;
110 supply_register_by_name ("pswa", &newpc, &mod);
111 if (mod)
112 dlog(1, "set pc to %p\n", C2v (newpc));
113 else
114 dlog(1, "set pc not changed %p\n", C2v (newpc));
115 }
116
117 /* store registers in the guest state (gdbserver_to_valgrind)
118 or fetch register from the guest state (valgrind_to_gdbserver). */
119 static
transfer_register(ThreadId tid,int abs_regno,void * buf,transfer_direction dir,int size,Bool * mod)120 void transfer_register (ThreadId tid, int abs_regno, void * buf,
121 transfer_direction dir, int size, Bool *mod)
122 {
123 ThreadState* tst = VG_(get_ThreadState)(tid);
124 int set = abs_regno / num_regs;
125 int regno = abs_regno % num_regs;
126 *mod = False;
127
128 VexGuestS390XState* s390x = (VexGuestS390XState*) get_arch (set, tst);
129
130 switch (regno) {
131 // numbers here have to match the order of regs above
132 // Attention: gdb order does not match valgrind order.
133 case 0: *mod = False; break; //GDBTD??? { "pswm", 0, 64 },
134 case 1: VG_(transfer) (&s390x->guest_IA, buf, dir, size, mod); break;
135 case 2: VG_(transfer) (&s390x->guest_r0, buf, dir, size, mod); break;
136 case 3: VG_(transfer) (&s390x->guest_r1, buf, dir, size, mod); break;
137 case 4: VG_(transfer) (&s390x->guest_r2, buf, dir, size, mod); break;
138 case 5: VG_(transfer) (&s390x->guest_r3, buf, dir, size, mod); break;
139 case 6: VG_(transfer) (&s390x->guest_r4, buf, dir, size, mod); break;
140 case 7: VG_(transfer) (&s390x->guest_r5, buf, dir, size, mod); break;
141 case 8: VG_(transfer) (&s390x->guest_r6, buf, dir, size, mod); break;
142 case 9: VG_(transfer) (&s390x->guest_r7, buf, dir, size, mod); break;
143 case 10: VG_(transfer) (&s390x->guest_r8, buf, dir, size, mod); break;
144 case 11: VG_(transfer) (&s390x->guest_r9, buf, dir, size, mod); break;
145 case 12: VG_(transfer) (&s390x->guest_r10, buf, dir, size, mod); break;
146 case 13: VG_(transfer) (&s390x->guest_r11, buf, dir, size, mod); break;
147 case 14: VG_(transfer) (&s390x->guest_r12, buf, dir, size, mod); break;
148 case 15: VG_(transfer) (&s390x->guest_r13, buf, dir, size, mod); break;
149 case 16: VG_(transfer) (&s390x->guest_r14, buf, dir, size, mod); break;
150 case 17: VG_(transfer) (&s390x->guest_r15, buf, dir, size, mod); break;
151 case 18: VG_(transfer) (&s390x->guest_a0, buf, dir, size, mod); break;
152 case 19: VG_(transfer) (&s390x->guest_a1, buf, dir, size, mod); break;
153 case 20: VG_(transfer) (&s390x->guest_a2, buf, dir, size, mod); break;
154 case 21: VG_(transfer) (&s390x->guest_a3, buf, dir, size, mod); break;
155 case 22: VG_(transfer) (&s390x->guest_a4, buf, dir, size, mod); break;
156 case 23: VG_(transfer) (&s390x->guest_a5, buf, dir, size, mod); break;
157 case 24: VG_(transfer) (&s390x->guest_a6, buf, dir, size, mod); break;
158 case 25: VG_(transfer) (&s390x->guest_a7, buf, dir, size, mod); break;
159 case 26: VG_(transfer) (&s390x->guest_a8, buf, dir, size, mod); break;
160 case 27: VG_(transfer) (&s390x->guest_a9, buf, dir, size, mod); break;
161 case 28: VG_(transfer) (&s390x->guest_a10, buf, dir, size, mod); break;
162 case 29: VG_(transfer) (&s390x->guest_a11, buf, dir, size, mod); break;
163 case 30: VG_(transfer) (&s390x->guest_a12, buf, dir, size, mod); break;
164 case 31: VG_(transfer) (&s390x->guest_a13, buf, dir, size, mod); break;
165 case 32: VG_(transfer) (&s390x->guest_a14, buf, dir, size, mod); break;
166 case 33: VG_(transfer) (&s390x->guest_a15, buf, dir, size, mod); break;
167 case 34: VG_(transfer) (&s390x->guest_fpc, buf, dir, size, mod); break;
168 case 35: VG_(transfer) (&s390x->guest_f0, buf, dir, size, mod); break;
169 case 36: VG_(transfer) (&s390x->guest_f1, buf, dir, size, mod); break;
170 case 37: VG_(transfer) (&s390x->guest_f2, buf, dir, size, mod); break;
171 case 38: VG_(transfer) (&s390x->guest_f3, buf, dir, size, mod); break;
172 case 39: VG_(transfer) (&s390x->guest_f4, buf, dir, size, mod); break;
173 case 40: VG_(transfer) (&s390x->guest_f5, buf, dir, size, mod); break;
174 case 41: VG_(transfer) (&s390x->guest_f6, buf, dir, size, mod); break;
175 case 42: VG_(transfer) (&s390x->guest_f7, buf, dir, size, mod); break;
176 case 43: VG_(transfer) (&s390x->guest_f8, buf, dir, size, mod); break;
177 case 44: VG_(transfer) (&s390x->guest_f9, buf, dir, size, mod); break;
178 case 45: VG_(transfer) (&s390x->guest_f10, buf, dir, size, mod); break;
179 case 46: VG_(transfer) (&s390x->guest_f11, buf, dir, size, mod); break;
180 case 47: VG_(transfer) (&s390x->guest_f12, buf, dir, size, mod); break;
181 case 48: VG_(transfer) (&s390x->guest_f13, buf, dir, size, mod); break;
182 case 49: VG_(transfer) (&s390x->guest_f14, buf, dir, size, mod); break;
183 case 50: VG_(transfer) (&s390x->guest_f15, buf, dir, size, mod); break;
184 case 51: *mod = False; break; //GDBTD??? { "orig_r2", 0, 64 },
185 default: vg_assert(0);
186 }
187 }
188
189 static
target_xml(Bool shadow_mode)190 const char* target_xml (Bool shadow_mode)
191 {
192 if (shadow_mode) {
193 return "s390x-generic-valgrind.xml";
194 } else {
195 return "s390x-generic.xml";
196 }
197 }
198
target_get_dtv(ThreadState * tst)199 static CORE_ADDR** target_get_dtv (ThreadState *tst)
200 {
201 VexGuestS390XState* s390x = (VexGuestS390XState*)&tst->arch.vex;
202 // Thread pointer is in a0 (high 32 bits) and a1. Dtv is the second word.
203 return (CORE_ADDR**)((Addr)((Addr64)s390x->guest_a0 << 32
204 | (Addr64)s390x->guest_a1)
205 + sizeof(CORE_ADDR));
206 }
207
208 static struct valgrind_target_ops low_target = {
209 num_regs,
210 regs,
211 17, //sp = r15, which is register offset 17 in regs
212 transfer_register,
213 get_pc,
214 set_pc,
215 "s390x",
216 target_xml,
217 target_get_dtv
218 };
219
s390x_init_architecture(struct valgrind_target_ops * target)220 void s390x_init_architecture (struct valgrind_target_ops *target)
221 {
222 *target = low_target;
223 set_register_cache (regs, num_regs);
224 gdbserver_expedite_regs = expedite_regs;
225 }
226