1 /* Low level interface to valgrind, for the remote server for GDB integrated
4 Free Software Foundation, Inc.
6 This file is part of VALGRIND.
7 It has been inspired from a file from gdbserver in gdb 6.6.
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., 51 Franklin Street, Fifth Floor,
22 Boston, MA 02110-1301, USA. */
29 #include "pub_core_aspacemgr.h"
30 #include "pub_tool_machine.h"
31 #include "pub_core_threadstate.h"
32 #include "pub_core_transtab.h"
33 #include "pub_core_gdbserver.h"
34 #include "pub_core_debuginfo.h"
36 #include "valgrind_low.h"
38 #include "libvex_guest_arm.h"
57 { "", 512, 0 }, // It seems these entries are needed
58 { "", 512, 0 }, // as previous versions of arm <-> gdb placed
59 { "", 512, 0 }, // some floating point registers here. So, cpsr
60 { "", 512, 0 }, // must be register 25.
101 static const char *expedite_regs[] = { "r11", "sp", "pc", 0 };
102 #define num_regs (sizeof (regs) / sizeof (regs[0]))
105 CORE_ADDR get_pc (void)
109 collect_register_by_name ("pc", &pc);
111 dlog(1, "stop pc is %p\n", (void *) pc);
116 void set_pc (CORE_ADDR newpc)
119 supply_register_by_name ("pc", &newpc, &mod);
121 dlog(1, "set pc to %p\n", C2v (newpc));
123 dlog(1, "set pc not changed %p\n", C2v (newpc));
126 Addr thumb_pc (Addr pc)
128 // If the thumb bit (bit 0) is already set, we trust it.
130 dlog (1, "%p = thumb (bit0 is set)\n", C2v (pc));
134 // Here, bit 0 is not set.
135 // For a pc aligned on 4 bytes, we have to use the debug
136 // info to determine the thumb-ness.
137 // else (aligned on 2 bytes), we trust this is a thumb
138 // address and we set the thumb bit.
141 dlog (1, "bit0 not set, bit1 set => %p = thumb\n", C2v (pc));
145 // pc aligned on 4 bytes. We need to use debug info.
147 Char fnname[200]; // ??? max size
149 Addr ptoc; // unused but needed.
150 // If this is a thumb instruction, we need to ask
151 // the debug info with the bit0 set
152 // (why can't debug info do that for us ???)
153 // (why if this is a 4 bytes thumb instruction ???)
154 if (VG_(get_fnname_raw) (pc | 1, fnname, 200)) {
155 if (VG_(lookup_symbol_SLOW)( "*", fnname, &entrypoint, &ptoc )) {
156 dlog (1, "fnname %s lookupsym %p => %p %s.\n",
157 fnname, C2v(entrypoint), C2v(pc),
158 (entrypoint & 1 ? "thumb" : "arm"));
165 dlog (1, "%p fnname %s lookupsym failed?. Assume arm\n",
170 // Can't find function name. We assume this is arm
171 dlog (1, "%p unknown fnname?. Assume arm\n", C2v (pc));
177 /* store registers in the guest state (gdbserver_to_valgrind)
178 or fetch register from the guest state (valgrind_to_gdbserver). */
180 void transfer_register (ThreadId tid, int abs_regno, void * buf,
181 transfer_direction dir, int size, Bool *mod)
183 ThreadState* tst = VG_(get_ThreadState)(tid);
184 int set = abs_regno / num_regs;
185 int regno = abs_regno % num_regs;
188 VexGuestARMState* arm = (VexGuestARMState*) get_arch (set, tst);
191 // numbers here have to match the order of regs above
192 // Attention: gdb order does not match valgrind order.
193 case 0: VG_(transfer) (&arm->guest_R0, buf, dir, size, mod); break;
194 case 1: VG_(transfer) (&arm->guest_R1, buf, dir, size, mod); break;
195 case 2: VG_(transfer) (&arm->guest_R2, buf, dir, size, mod); break;
196 case 3: VG_(transfer) (&arm->guest_R3, buf, dir, size, mod); break;
197 case 4: VG_(transfer) (&arm->guest_R4, buf, dir, size, mod); break;
198 case 5: VG_(transfer) (&arm->guest_R5, buf, dir, size, mod); break;
199 case 6: VG_(transfer) (&arm->guest_R6, buf, dir, size, mod); break;
200 case 7: VG_(transfer) (&arm->guest_R7, buf, dir, size, mod); break;
201 case 8: VG_(transfer) (&arm->guest_R8, buf, dir, size, mod); break;
202 case 9: VG_(transfer) (&arm->guest_R9, buf, dir, size, mod); break;
203 case 10: VG_(transfer) (&arm->guest_R10, buf, dir, size, mod); break;
204 case 11: VG_(transfer) (&arm->guest_R11, buf, dir, size, mod); break;
205 case 12: VG_(transfer) (&arm->guest_R12, buf, dir, size, mod); break;
206 case 13: VG_(transfer) (&arm->guest_R13, buf, dir, size, mod); break;
207 case 14: VG_(transfer) (&arm->guest_R14, buf, dir, size, mod); break;
209 VG_(transfer) (&arm->guest_R15T, buf, dir, size, mod);
210 if (dir == gdbserver_to_valgrind && *mod) {
211 // If gdb is changing the PC, we have to set the thumb bit
213 arm->guest_R15T = thumb_pc(arm->guest_R15T);
221 case 20: /* 9 "empty registers". See struct reg regs above. */
225 case 24: *mod = False; break;
227 UInt cpsr = LibVEX_GuestARM_get_cpsr (arm);
228 if (dir == valgrind_to_gdbserver) {
229 VG_(transfer) (&cpsr, buf, dir, size, mod);
233 VG_(transfer) (&newcpsr, buf, dir, size, mod);
234 *mod = newcpsr != cpsr;
235 // GDBTD ???? see FIXME in guest_arm_helpers.c
236 LibVEX_GuestARM_put_flags (newcpsr, arm);
243 case 26: VG_(transfer) (&arm->guest_D0, buf, dir, size, mod); break;
244 case 27: VG_(transfer) (&arm->guest_D1, buf, dir, size, mod); break;
245 case 28: VG_(transfer) (&arm->guest_D2, buf, dir, size, mod); break;
246 case 29: VG_(transfer) (&arm->guest_D3, buf, dir, size, mod); break;
247 case 30: VG_(transfer) (&arm->guest_D4, buf, dir, size, mod); break;
248 case 31: VG_(transfer) (&arm->guest_D5, buf, dir, size, mod); break;
249 case 32: VG_(transfer) (&arm->guest_D6, buf, dir, size, mod); break;
250 case 33: VG_(transfer) (&arm->guest_D7, buf, dir, size, mod); break;
251 case 34: VG_(transfer) (&arm->guest_D8, buf, dir, size, mod); break;
252 case 35: VG_(transfer) (&arm->guest_D9, buf, dir, size, mod); break;
253 case 36: VG_(transfer) (&arm->guest_D10, buf, dir, size, mod); break;
254 case 37: VG_(transfer) (&arm->guest_D11, buf, dir, size, mod); break;
255 case 38: VG_(transfer) (&arm->guest_D12, buf, dir, size, mod); break;
256 case 39: VG_(transfer) (&arm->guest_D13, buf, dir, size, mod); break;
257 case 40: VG_(transfer) (&arm->guest_D14, buf, dir, size, mod); break;
258 case 41: VG_(transfer) (&arm->guest_D15, buf, dir, size, mod); break;
259 case 42: VG_(transfer) (&arm->guest_D16, buf, dir, size, mod); break;
260 case 43: VG_(transfer) (&arm->guest_D17, buf, dir, size, mod); break;
261 case 44: VG_(transfer) (&arm->guest_D18, buf, dir, size, mod); break;
262 case 45: VG_(transfer) (&arm->guest_D19, buf, dir, size, mod); break;
263 case 46: VG_(transfer) (&arm->guest_D20, buf, dir, size, mod); break;
264 case 47: VG_(transfer) (&arm->guest_D21, buf, dir, size, mod); break;
265 case 48: VG_(transfer) (&arm->guest_D22, buf, dir, size, mod); break;
266 case 49: VG_(transfer) (&arm->guest_D23, buf, dir, size, mod); break;
267 case 50: VG_(transfer) (&arm->guest_D24, buf, dir, size, mod); break;
268 case 51: VG_(transfer) (&arm->guest_D25, buf, dir, size, mod); break;
269 case 52: VG_(transfer) (&arm->guest_D26, buf, dir, size, mod); break;
270 case 53: VG_(transfer) (&arm->guest_D27, buf, dir, size, mod); break;
271 case 54: VG_(transfer) (&arm->guest_D28, buf, dir, size, mod); break;
272 case 55: VG_(transfer) (&arm->guest_D29, buf, dir, size, mod); break;
273 case 56: VG_(transfer) (&arm->guest_D30, buf, dir, size, mod); break;
274 case 57: VG_(transfer) (&arm->guest_D31, buf, dir, size, mod); break;
275 case 58: VG_(transfer) (&arm->guest_FPSCR, buf, dir, size, mod); break;
276 default: vg_assert(0);
280 static struct valgrind_target_ops low_target = {
288 "arm-with-vfpv3.xml",
289 "arm-with-vfpv3-valgrind.xml"
292 void arm_init_architecture (struct valgrind_target_ops *target)
294 *target = low_target;
295 set_register_cache (regs, num_regs);
296 gdbserver_expedite_regs = expedite_regs;