sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame^] | 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_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 | |
| 35 | #include "valgrind_low.h" |
| 36 | |
| 37 | #include "libvex_guest_amd64.h" |
| 38 | /* GDBTD: ??? have a cleaner way to get the f80 <> f64 conversion functions */ |
| 39 | /* below include needed for conversion f80 <> f64 */ |
| 40 | #include "../../VEX/priv/guest_generic_x87.h" |
| 41 | |
| 42 | /* below loosely inspired from file generated with gdb regdat.sh */ |
| 43 | |
| 44 | struct reg regs[] = { |
| 45 | { "rax", 0, 64 }, |
| 46 | { "rbx", 64, 64 }, |
| 47 | { "rcx", 128, 64 }, |
| 48 | { "rdx", 192, 64 }, |
| 49 | { "rsi", 256, 64 }, |
| 50 | { "rdi", 320, 64 }, |
| 51 | { "rbp", 384, 64 }, |
| 52 | { "rsp", 448, 64 }, |
| 53 | { "r8", 512, 64 }, |
| 54 | { "r9", 576, 64 }, |
| 55 | { "r10", 640, 64 }, |
| 56 | { "r11", 704, 64 }, |
| 57 | { "r12", 768, 64 }, |
| 58 | { "r13", 832, 64 }, |
| 59 | { "r14", 896, 64 }, |
| 60 | { "r15", 960, 64 }, |
| 61 | { "rip", 1024, 64 }, |
| 62 | { "eflags", 1088, 32 }, |
| 63 | { "cs", 1120, 32 }, |
| 64 | { "ss", 1152, 32 }, |
| 65 | { "ds", 1184, 32 }, |
| 66 | { "es", 1216, 32 }, |
| 67 | { "fs", 1248, 32 }, |
| 68 | { "gs", 1280, 32 }, |
| 69 | { "st0", 1312, 80 }, |
| 70 | { "st1", 1392, 80 }, |
| 71 | { "st2", 1472, 80 }, |
| 72 | { "st3", 1552, 80 }, |
| 73 | { "st4", 1632, 80 }, |
| 74 | { "st5", 1712, 80 }, |
| 75 | { "st6", 1792, 80 }, |
| 76 | { "st7", 1872, 80 }, |
| 77 | { "fctrl", 1952, 32 }, |
| 78 | { "fstat", 1984, 32 }, |
| 79 | { "ftag", 2016, 32 }, |
| 80 | { "fiseg", 2048, 32 }, |
| 81 | { "fioff", 2080, 32 }, |
| 82 | { "foseg", 2112, 32 }, |
| 83 | { "fooff", 2144, 32 }, |
| 84 | { "fop", 2176, 32 }, |
| 85 | { "xmm0", 2208, 128 }, |
| 86 | { "xmm1", 2336, 128 }, |
| 87 | { "xmm2", 2464, 128 }, |
| 88 | { "xmm3", 2592, 128 }, |
| 89 | { "xmm4", 2720, 128 }, |
| 90 | { "xmm5", 2848, 128 }, |
| 91 | { "xmm6", 2976, 128 }, |
| 92 | { "xmm7", 3104, 128 }, |
| 93 | { "xmm8", 3232, 128 }, |
| 94 | { "xmm9", 3360, 128 }, |
| 95 | { "xmm10", 3488, 128 }, |
| 96 | { "xmm11", 3616, 128 }, |
| 97 | { "xmm12", 3744, 128 }, |
| 98 | { "xmm13", 3872, 128 }, |
| 99 | { "xmm14", 4000, 128 }, |
| 100 | { "xmm15", 4128, 128 }, |
| 101 | { "mxcsr", 4256, 32 }, |
| 102 | #if defined(VGO_linux) |
| 103 | { "orig_rax", 4288, 64 } |
| 104 | #endif |
| 105 | }; |
| 106 | static const char *expedite_regs[] = { "rbp", "rsp", "rip", 0 }; |
| 107 | #define num_regs (sizeof (regs) / sizeof (regs[0])) |
| 108 | |
| 109 | static |
| 110 | CORE_ADDR get_pc (void) |
| 111 | { |
| 112 | unsigned long pc; |
| 113 | |
| 114 | collect_register_by_name ("rip", &pc); |
| 115 | |
| 116 | dlog(1, "stop pc is %p\n", (void *) pc); |
| 117 | return pc; |
| 118 | } |
| 119 | |
| 120 | static |
| 121 | void set_pc (CORE_ADDR newpc) |
| 122 | { |
| 123 | Bool mod; |
| 124 | supply_register_by_name ("rip", &newpc, &mod); |
| 125 | if (mod) |
| 126 | dlog(1, "set pc to %p\n", C2v (newpc)); |
| 127 | else |
| 128 | dlog(1, "set pc not changed %p\n", C2v (newpc)); |
| 129 | } |
| 130 | |
| 131 | /* store registers in the guest state (gdbserver_to_valgrind) |
| 132 | or fetch register from the guest state (valgrind_to_gdbserver). */ |
| 133 | static |
| 134 | void transfer_register (ThreadId tid, int abs_regno, void * buf, |
| 135 | transfer_direction dir, int size, Bool *mod) |
| 136 | { |
| 137 | ThreadState* tst = VG_(get_ThreadState)(tid); |
| 138 | int set = abs_regno / num_regs; |
| 139 | int regno = abs_regno % num_regs; |
| 140 | *mod = False; |
| 141 | |
| 142 | VexGuestAMD64State* amd64 = (VexGuestAMD64State*) get_arch (set, tst); |
| 143 | |
| 144 | switch (regno) { |
| 145 | // numbers here have to match the order of regs above. |
| 146 | // Attention: gdb order does not match valgrind order. |
| 147 | case 0: VG_(transfer) (&amd64->guest_RAX, buf, dir, size, mod); break; |
| 148 | case 1: VG_(transfer) (&amd64->guest_RBX, buf, dir, size, mod); break; |
| 149 | case 2: VG_(transfer) (&amd64->guest_RCX, buf, dir, size, mod); break; |
| 150 | case 3: VG_(transfer) (&amd64->guest_RDX, buf, dir, size, mod); break; |
| 151 | case 4: VG_(transfer) (&amd64->guest_RSI, buf, dir, size, mod); break; |
| 152 | case 5: VG_(transfer) (&amd64->guest_RDI, buf, dir, size, mod); break; |
| 153 | case 6: VG_(transfer) (&amd64->guest_RBP, buf, dir, size, mod); break; |
| 154 | case 7: VG_(transfer) (&amd64->guest_RSP, buf, dir, size, mod); break; |
| 155 | case 8: VG_(transfer) (&amd64->guest_R8, buf, dir, size, mod); break; |
| 156 | case 9: VG_(transfer) (&amd64->guest_R9, buf, dir, size, mod); break; |
| 157 | case 10: VG_(transfer) (&amd64->guest_R10, buf, dir, size, mod); break; |
| 158 | case 11: VG_(transfer) (&amd64->guest_R11, buf, dir, size, mod); break; |
| 159 | case 12: VG_(transfer) (&amd64->guest_R12, buf, dir, size, mod); break; |
| 160 | case 13: VG_(transfer) (&amd64->guest_R13, buf, dir, size, mod); break; |
| 161 | case 14: VG_(transfer) (&amd64->guest_R14, buf, dir, size, mod); break; |
| 162 | case 15: VG_(transfer) (&amd64->guest_R15, buf, dir, size, mod); break; |
| 163 | case 16: |
| 164 | VG_(transfer) (&amd64->guest_RIP, buf, dir, size, mod); |
| 165 | if (*mod && VG_(debugLog_getLevel)() > 2) { |
| 166 | char bufimage [2*sizeof(amd64->guest_IP_AT_SYSCALL) + 1]; |
| 167 | heximage (bufimage, |
| 168 | (char *) &amd64->guest_IP_AT_SYSCALL, |
| 169 | sizeof(amd64->guest_IP_AT_SYSCALL)); |
| 170 | dlog(3, "guest_IP_AT_SYSCALL %s\n", bufimage); |
| 171 | } |
| 172 | break; |
| 173 | case 17: |
| 174 | if (dir == valgrind_to_gdbserver) { |
| 175 | ULong rflags; |
| 176 | /* we can only retrieve the real flags (set 0) |
| 177 | retrieving shadow flags is not ok */ |
| 178 | if (set == 0) |
| 179 | rflags = LibVEX_GuestAMD64_get_rflags (amd64); |
| 180 | else |
| 181 | rflags = 0; |
| 182 | VG_(transfer) (&rflags, buf, dir, size, mod); |
| 183 | } else { |
| 184 | *mod = False; //GDBTD? how do we store rflags in libvex_guest_amd64.h ??? |
| 185 | } |
| 186 | break; |
| 187 | case 18: *mod = False; break; //GDBTD VG_(transfer) (&amd64->guest_CS, buf, dir, size, mod); |
| 188 | case 19: *mod = False; break; //GDBTD VG_(transfer) (&amd64->guest_SS, buf, dir, size, mod); |
| 189 | case 20: *mod = False; break; //GDBTD VG_(transfer) (&amd64->guest_DS, buf, dir, size, mod); |
| 190 | case 21: *mod = False; break; //GDBTD VG_(transfer) (&amd64->guest_ES, buf, dir, size, mod); |
| 191 | case 22: *mod = False; break; //GDBTD VG_(transfer) (&amd64->guest_FS, buf, dir, size, mod); |
| 192 | case 23: VG_(transfer) (&amd64->guest_GS_0x60, buf, dir, size, mod); break; |
| 193 | case 24: |
| 194 | case 25: |
| 195 | case 26: |
| 196 | case 27: /* register 24 to 31 are float registers 80 bits but 64 bits in valgrind */ |
| 197 | case 28: |
| 198 | case 29: |
| 199 | case 30: |
| 200 | case 31: |
| 201 | if (dir == valgrind_to_gdbserver) { |
| 202 | UChar fpreg80[10]; |
| 203 | convert_f64le_to_f80le ((UChar *)&amd64->guest_FPREG[regno-16], |
| 204 | fpreg80); |
| 205 | VG_(transfer) (&fpreg80, buf, dir, sizeof(fpreg80), mod); |
| 206 | } else { |
| 207 | ULong fpreg64; |
| 208 | convert_f80le_to_f64le (buf, (UChar *)&fpreg64); |
| 209 | VG_(transfer) (&amd64->guest_FPREG[regno-16], &fpreg64, |
| 210 | dir, sizeof(fpreg64), mod); |
| 211 | } |
| 212 | break; |
| 213 | case 32: |
| 214 | if (dir == valgrind_to_gdbserver) { |
| 215 | // vex only models the rounding bits (see libvex_guest_amd64.h) |
| 216 | UWord value = 0x037f; |
| 217 | value |= amd64->guest_FPROUND << 10; |
| 218 | VG_(transfer)(&value, buf, dir, size, mod); |
| 219 | } else { |
| 220 | *mod = False; // GDBTD???? VEX equivalent fcrtl |
| 221 | } |
| 222 | break; |
| 223 | case 33: |
| 224 | if (dir == valgrind_to_gdbserver) { |
| 225 | UWord value = amd64->guest_FC3210; |
| 226 | value |= (amd64->guest_FTOP & 7) << 11; |
| 227 | VG_(transfer)(&value, buf, dir, size, mod); |
| 228 | } else { |
| 229 | *mod = False; // GDBTD???? VEX equivalent fstat |
| 230 | } |
| 231 | break; |
| 232 | case 34: |
| 233 | if (dir == valgrind_to_gdbserver) { |
| 234 | // vex doesn't model these precisely |
| 235 | UWord value = |
| 236 | ((amd64->guest_FPTAG[0] ? 0 : 3) << 0) | |
| 237 | ((amd64->guest_FPTAG[1] ? 0 : 3) << 2) | |
| 238 | ((amd64->guest_FPTAG[2] ? 0 : 3) << 4) | |
| 239 | ((amd64->guest_FPTAG[3] ? 0 : 3) << 6) | |
| 240 | ((amd64->guest_FPTAG[4] ? 0 : 3) << 8) | |
| 241 | ((amd64->guest_FPTAG[5] ? 0 : 3) << 10) | |
| 242 | ((amd64->guest_FPTAG[6] ? 0 : 3) << 12) | |
| 243 | ((amd64->guest_FPTAG[7] ? 0 : 3) << 14); |
| 244 | VG_(transfer)(&value, buf, dir, size, mod); |
| 245 | } else { |
| 246 | *mod = False; // GDBTD???? VEX equivalent ftag |
| 247 | } |
| 248 | break; |
| 249 | case 35: *mod = False; break; // GDBTD ??? equivalent of fiseg |
| 250 | case 36: *mod = False; break; // GDBTD ??? equivalent of fioff |
| 251 | case 37: *mod = False; break; // GDBTD ??? equivalent of foseg |
| 252 | case 38: *mod = False; break; // GDBTD ??? equivalent of fooff |
| 253 | case 39: *mod = False; break; // GDBTD ??? equivalent of fop |
| 254 | case 40: VG_(transfer) (&amd64->guest_XMM0, buf, dir, size, mod); break; |
| 255 | case 41: VG_(transfer) (&amd64->guest_XMM1, buf, dir, size, mod); break; |
| 256 | case 42: VG_(transfer) (&amd64->guest_XMM2, buf, dir, size, mod); break; |
| 257 | case 43: VG_(transfer) (&amd64->guest_XMM3, buf, dir, size, mod); break; |
| 258 | case 44: VG_(transfer) (&amd64->guest_XMM4, buf, dir, size, mod); break; |
| 259 | case 45: VG_(transfer) (&amd64->guest_XMM5, buf, dir, size, mod); break; |
| 260 | case 46: VG_(transfer) (&amd64->guest_XMM6, buf, dir, size, mod); break; |
| 261 | case 47: VG_(transfer) (&amd64->guest_XMM7, buf, dir, size, mod); break; |
| 262 | case 48: VG_(transfer) (&amd64->guest_XMM8, buf, dir, size, mod); break; |
| 263 | case 49: VG_(transfer) (&amd64->guest_XMM9, buf, dir, size, mod); break; |
| 264 | case 50: VG_(transfer) (&amd64->guest_XMM10, buf, dir, size, mod); break; |
| 265 | case 51: VG_(transfer) (&amd64->guest_XMM11, buf, dir, size, mod); break; |
| 266 | case 52: VG_(transfer) (&amd64->guest_XMM12, buf, dir, size, mod); break; |
| 267 | case 53: VG_(transfer) (&amd64->guest_XMM13, buf, dir, size, mod); break; |
| 268 | case 54: VG_(transfer) (&amd64->guest_XMM14, buf, dir, size, mod); break; |
| 269 | case 55: VG_(transfer) (&amd64->guest_XMM15, buf, dir, size, mod); break; |
| 270 | case 56: |
| 271 | if (dir == valgrind_to_gdbserver) { |
| 272 | // vex only models the rounding bits (see libvex_guest_x86.h) |
| 273 | UWord value = 0x1f80; |
| 274 | value |= amd64->guest_SSEROUND << 13; |
| 275 | VG_(transfer)(&value, buf, dir, size, mod); |
| 276 | } else { |
| 277 | *mod = False; // GDBTD???? VEX equivalent mxcsr |
| 278 | } |
| 279 | break; |
| 280 | case 57: *mod = False; break; // GDBTD???? VEX equivalent { "orig_rax"}, |
| 281 | default: vg_assert(0); |
| 282 | } |
| 283 | } |
| 284 | |
| 285 | static struct valgrind_target_ops low_target = { |
| 286 | num_regs, |
| 287 | regs, |
| 288 | 7, //RSP |
| 289 | transfer_register, |
| 290 | get_pc, |
| 291 | set_pc, |
| 292 | "amd64", |
| 293 | NULL, // target_xml not needed. |
| 294 | #if defined(VGO_linux) |
| 295 | "amd64-linux-valgrind.xml" |
| 296 | #else |
| 297 | "amd64-coresse-valgrind.xml" |
| 298 | #endif |
| 299 | }; |
| 300 | |
| 301 | void amd64_init_architecture (struct valgrind_target_ops *target) |
| 302 | { |
| 303 | *target = low_target; |
| 304 | set_register_cache (regs, num_regs); |
| 305 | gdbserver_expedite_regs = expedite_regs; |
| 306 | } |