1 2 /*--------------------------------------------------------------------*/ 3 /*--- begin dispatch-tilegx-linux.S ---*/ 4 /*--------------------------------------------------------------------*/ 5 6 /* 7 This file is part of Valgrind, a dynamic binary instrumentation 8 framework. 9 10 Copyright (C) 2010-2015 Tilera Corp. 11 12 This program is free software; you can redistribute it and/or 13 modify it under the terms of the GNU General Public License as 14 published by the Free Software Foundation; either version 2 of the 15 License, or (at your option) any later version. 16 17 This program is distributed in the hope that it will be useful, but 18 WITHOUT ANY WARRANTY; without even the implied warranty of 19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 20 General Public License for more details. 21 22 You should have received a copy of the GNU General Public License 23 along with this program; if not, write to the Free Software 24 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 25 02111-1307, USA. 26 27 The GNU General Public License is contained in the file COPYING. 28 */ 29 30 /* Contributed by Zhi-Gang Liu <zliu at tilera dot com> */ 31 32 #include "pub_core_basics_asm.h" 33 34 #if defined(VGP_tilegx_linux) 35 #include "pub_core_dispatch_asm.h" 36 #include "pub_core_transtab_asm.h" 37 #include "libvex_guest_offsets.h" /* for OFFSET_tilegx_PC */ 38 39 /*------------------------------------------------------------*/ 40 /*--- ---*/ 41 /*--- The dispatch loop. VG_(run_innerloop) is used to ---*/ 42 /*--- run all translations except no-redir ones. ---*/ 43 /*--- ---*/ 44 /*------------------------------------------------------------*/ 45 46 /*----------------------------------------------------*/ 47 /*--- Preamble (set everything up) ---*/ 48 /*----------------------------------------------------*/ 49 50 /* signature: 51 void VG_(disp_run_translations)(UWord* two_words, 52 void* guest_state, 53 Addr host_addr ); 54 UWord VG_(run_innerloop) ( void* guest_state, UWord do_profiling ); 55 */ 56 57 .text 58 .globl VG_(disp_run_translations) 59 VG_(disp_run_translations): 60 61 /* r0 holds two_words 62 r1 holds guest_state 63 r2 holds host_addr */ 64 65 /* New stack frame */ 66 addli sp, sp, -256 67 addi r29, sp, 8 68 /* 69 high memory of stack 70 216 lr 71 208 r53 72 200 r52 73 192 r51 74 ... 75 48 r33 76 40 r32 77 32 r31 78 24 r30 79 16 r1 <--- 80 8 r0 81 0 <-sp 82 */ 83 st_add r29, r0, 8 84 st_add r29, r1, 8 85 86 /* ... and r30 - r53 */ 87 st_add r29, r30, 8 88 st_add r29, r31, 8 89 st_add r29, r32, 8 90 st_add r29, r33, 8 91 st_add r29, r34, 8 92 st_add r29, r35, 8 93 st_add r29, r36, 8 94 st_add r29, r37, 8 95 st_add r29, r38, 8 96 st_add r29, r39, 8 97 st_add r29, r40, 8 98 st_add r29, r41, 8 99 st_add r29, r42, 8 100 st_add r29, r43, 8 101 st_add r29, r44, 8 102 st_add r29, r45, 8 103 st_add r29, r46, 8 104 st_add r29, r47, 8 105 st_add r29, r48, 8 106 st_add r29, r49, 8 107 st_add r29, r50, 8 108 st_add r29, r51, 8 109 st_add r29, r52, 8 110 st_add r29, r53, 8 111 st r29, lr 112 113 /* Load the address of guest state into guest state register r50. */ 114 move r50, r1 115 116 //j postamble 117 118 /* jump to the code cache. */ 119 jr r2 120 /*NOTREACHED*/ 121 122 123 /*----------------------------------------------------*/ 124 /*--- Postamble and exit. ---*/ 125 /*----------------------------------------------------*/ 126 127 postamble: 128 /* At this point, r12 and r13 contain two 129 words to be returned to the caller. r12 130 holds a TRC value, and r13 optionally may 131 hold another word (for CHAIN_ME exits, the 132 address of the place to patch.) */ 133 134 /* run_innerloop_exit_REALLY: 135 r50 holds VG_TRC_* value to return 136 Return to parent stack 137 addli sp, sp, 256 */ 138 139 addi r29, sp, 8 140 141 /* Restore r0 from stack; holding address of twp words */ 142 ld_add r0, r29, 16 143 /* store r12 in two_words[0] */ 144 st_add r0, r12, 8 145 /* store r13 in two_words[1] */ 146 st r0, r13 147 148 /* Restore callee-saved registers... */ 149 ld_add r30, r29, 8 150 ld_add r31, r29, 8 151 ld_add r32, r29, 8 152 ld_add r33, r29, 8 153 ld_add r34, r29, 8 154 ld_add r35, r29, 8 155 ld_add r36, r29, 8 156 ld_add r37, r29, 8 157 ld_add r38, r29, 8 158 ld_add r39, r29, 8 159 ld_add r40, r29, 8 160 ld_add r41, r29, 8 161 ld_add r42, r29, 8 162 ld_add r43, r29, 8 163 ld_add r44, r29, 8 164 ld_add r45, r29, 8 165 ld_add r46, r29, 8 166 ld_add r47, r29, 8 167 ld_add r48, r29, 8 168 ld_add r49, r29, 8 169 ld_add r50, r29, 8 170 ld_add r51, r29, 8 171 ld_add r52, r29, 8 172 ld_add r53, r29, 8 173 ld lr, r29 174 addli sp, sp, 256 /* stack_size */ 175 jr lr 176 nop 177 178 179 /*----------------------------------------------------*/ 180 /*--- Continuation points ---*/ 181 /*----------------------------------------------------*/ 182 183 /* ------ Chain me to slow entry point ------ */ 184 .global VG_(disp_cp_chain_me_to_slowEP) 185 VG_(disp_cp_chain_me_to_slowEP): 186 /* We got called. The return address indicates 187 where the patching needs to happen. Collect 188 the return address and, exit back to C land, 189 handing the caller the pair (Chain_me_S, RA) */ 190 # if (VG_TRC_CHAIN_ME_TO_SLOW_EP > 128) 191 # error ("VG_TRC_CHAIN_ME_TO_SLOW_EP is > 128"); 192 # endif 193 moveli r12, VG_TRC_CHAIN_ME_TO_SLOW_EP 194 move r13, lr 195 /* 32 = mkLoadImm_EXACTLY4 196 8 = jalr r9 197 8 = nop */ 198 addi r13, r13, -40 199 j postamble 200 201 /* ------ Chain me to slow entry point ------ */ 202 .global VG_(disp_cp_chain_me_to_fastEP) 203 VG_(disp_cp_chain_me_to_fastEP): 204 /* We got called. The return address indicates 205 where the patching needs to happen. Collect 206 the return address and, exit back to C land, 207 handing the caller the pair (Chain_me_S, RA) */ 208 # if (VG_TRC_CHAIN_ME_TO_FAST_EP > 128) 209 # error ("VG_TRC_CHAIN_ME_TO_FAST_EP is > 128"); 210 # endif 211 moveli r12, VG_TRC_CHAIN_ME_TO_FAST_EP 212 move r13, lr 213 /* 32 = mkLoadImm_EXACTLY4 214 8 = jalr r9 215 8 = nop */ 216 addi r13, r13, -40 217 j postamble 218 219 /* ------ Indirect but boring jump ------ */ 220 .global VG_(disp_cp_xindir) 221 VG_(disp_cp_xindir): 222 /* Where are we going? */ 223 addli r11, r50, OFFSET_tilegx_pc 224 ld r11, r11 225 226 moveli r7, hw2_last(VG_(stats__n_xindirs_32)) 227 shl16insli r7, r7, hw1(VG_(stats__n_xindirs_32)) 228 shl16insli r7, r7, hw0(VG_(stats__n_xindirs_32)) 229 ld4u r6, r7 230 addi r6, r6, 1 231 st4 r7, r6 232 233 /* try a fast lookup in the translation cache */ 234 /* r14 = VG_TT_FAST_HASH(addr) * sizeof(ULong*) 235 = (t8 >> 3 & VG_TT_FAST_MASK) << 3 */ 236 237 move r14, r11 238 /* Assume VG_TT_FAST_MASK < 4G */ 239 moveli r12, hw1(VG_TT_FAST_MASK) 240 shl16insli r12, r12, hw0(VG_TT_FAST_MASK) 241 shrui r14, r14, 3 242 and r14, r14, r12 243 shli r14, r14, 4 244 /* Note, each tt_fast hash entry has two pointers i.e. 16 Bytes. */ 245 246 /* r13 = (addr of VG_(tt_fast)) + r14 */ 247 moveli r13, hw2_last(VG_(tt_fast)) 248 shl16insli r13, r13, hw1(VG_(tt_fast)) 249 shl16insli r13, r13, hw0(VG_(tt_fast)) 250 251 add r13, r13, r14 252 253 /* r12 = VG_(tt_fast)[hash] :: ULong* */ 254 ld_add r12, r13, 8 255 256 { 257 ld r25, r13 258 sub r7, r12, r11 259 } 260 261 bnez r7, fast_lookup_failed 262 263 /* Run the translation */ 264 jr r25 265 266 .quad 0x0 267 268 fast_lookup_failed: 269 /* %PC is up to date */ 270 /* back out decrement of the dispatch counter */ 271 /* hold dispatch_ctr in t0 (r8) */ 272 273 moveli r7, hw2_last(VG_(stats__n_xindir_misses_32)) 274 shl16insli r7, r7, hw1(VG_(stats__n_xindir_misses_32)) 275 shl16insli r7, r7, hw0(VG_(stats__n_xindir_misses_32)) 276 ld4u r6, r7 277 addi r6, r6, 1 278 st4 r7, r6 279 moveli r12, VG_TRC_INNER_FASTMISS 280 movei r13, 0 281 j postamble 282 283 /* ------ Assisted jump ------ */ 284 .global VG_(disp_cp_xassisted) 285 VG_(disp_cp_xassisted): 286 /* guest-state-pointer contains the TRC. Put the value into the 287 return register */ 288 move r12, r50 289 movei r13, 0 290 j postamble 291 292 /* ------ Event check failed ------ */ 293 .global VG_(disp_cp_evcheck_fail) 294 VG_(disp_cp_evcheck_fail): 295 moveli r12, VG_TRC_INNER_COUNTERZERO 296 movei r13, 0 297 j postamble 298 299 .size VG_(disp_run_translations), .-VG_(disp_run_translations) 300 301 #endif /* defined(VGP_tilegx_linux) */ 302 303 /* Let the linker know we don't need an executable stack */ 304 MARK_STACK_NO_EXEC 305 306 /*--------------------------------------------------------------------*/ 307 /*--- end ---*/ 308 /*--------------------------------------------------------------------*/ 309 310
