| |
| /*--------------------------------------------------------------------*/ |
| /*--- begin dispatch-tilegx-linux.S ---*/ |
| /*--------------------------------------------------------------------*/ |
| |
| /* |
| This file is part of Valgrind, a dynamic binary instrumentation |
| framework. |
| |
| Copyright (C) 2010-2013 Tilera Corp. |
| |
| This program is free software; you can redistribute it and/or |
| modify it under the terms of the GNU General Public License as |
| published by the Free Software Foundation; either version 2 of the |
| License, or (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307, USA. |
| |
| The GNU General Public License is contained in the file COPYING. |
| */ |
| |
| /* Contributed by Zhi-Gang Liu <zliu at tilera dot com> */ |
| |
| #if defined(VGP_tilegx_linux) |
| #include "pub_core_basics_asm.h" |
| #include "pub_core_dispatch_asm.h" |
| #include "pub_core_transtab_asm.h" |
| #include "libvex_guest_offsets.h" /* for OFFSET_tilegx_PC */ |
| |
| /*------------------------------------------------------------*/ |
| /*--- ---*/ |
| /*--- The dispatch loop. VG_(run_innerloop) is used to ---*/ |
| /*--- run all translations except no-redir ones. ---*/ |
| /*--- ---*/ |
| /*------------------------------------------------------------*/ |
| |
| /*----------------------------------------------------*/ |
| /*--- Preamble (set everything up) ---*/ |
| /*----------------------------------------------------*/ |
| |
| /* signature: |
| void VG_(disp_run_translations)(UWord* two_words, |
| void* guest_state, |
| Addr host_addr ); |
| UWord VG_(run_innerloop) ( void* guest_state, UWord do_profiling ); |
| */ |
| |
| .text |
| .globl VG_(disp_run_translations) |
| VG_(disp_run_translations): |
| |
| /* r0 holds two_words |
| r1 holds guest_state |
| r2 holds host_addr */ |
| |
| /* New stack frame */ |
| addli sp, sp, -256 |
| addi r29, sp, 8 |
| /* |
| high memory of stack |
| 216 lr |
| 208 r53 |
| 200 r52 |
| 192 r51 |
| ... |
| 48 r33 |
| 40 r32 |
| 32 r31 |
| 24 r30 |
| 16 r1 <--- |
| 8 r0 |
| 0 <-sp |
| */ |
| st_add r29, r0, 8 |
| st_add r29, r1, 8 |
| |
| /* ... and r30 - r53 */ |
| st_add r29, r30, 8 |
| st_add r29, r31, 8 |
| st_add r29, r32, 8 |
| st_add r29, r33, 8 |
| st_add r29, r34, 8 |
| st_add r29, r35, 8 |
| st_add r29, r36, 8 |
| st_add r29, r37, 8 |
| st_add r29, r38, 8 |
| st_add r29, r39, 8 |
| st_add r29, r40, 8 |
| st_add r29, r41, 8 |
| st_add r29, r42, 8 |
| st_add r29, r43, 8 |
| st_add r29, r44, 8 |
| st_add r29, r45, 8 |
| st_add r29, r46, 8 |
| st_add r29, r47, 8 |
| st_add r29, r48, 8 |
| st_add r29, r49, 8 |
| st_add r29, r50, 8 |
| st_add r29, r51, 8 |
| st_add r29, r52, 8 |
| st_add r29, r53, 8 |
| st r29, lr |
| |
| /* Load the address of guest state into guest state register r50. */ |
| move r50, r1 |
| |
| //j postamble |
| |
| /* jump to the code cache. */ |
| jr r2 |
| /*NOTREACHED*/ |
| |
| |
| /*----------------------------------------------------*/ |
| /*--- Postamble and exit. ---*/ |
| /*----------------------------------------------------*/ |
| |
| postamble: |
| /* At this point, r12 and r13 contain two |
| words to be returned to the caller. r12 |
| holds a TRC value, and r13 optionally may |
| hold another word (for CHAIN_ME exits, the |
| address of the place to patch.) */ |
| |
| /* run_innerloop_exit_REALLY: |
| r50 holds VG_TRC_* value to return |
| Return to parent stack |
| addli sp, sp, 256 */ |
| |
| addi r29, sp, 8 |
| |
| /* Restore r0 from stack; holding address of twp words */ |
| ld_add r0, r29, 16 |
| /* store r12 in two_words[0] */ |
| st_add r0, r12, 8 |
| /* store r13 in two_words[1] */ |
| st r0, r13 |
| |
| /* Restore callee-saved registers... */ |
| ld_add r30, r29, 8 |
| ld_add r31, r29, 8 |
| ld_add r32, r29, 8 |
| ld_add r33, r29, 8 |
| ld_add r34, r29, 8 |
| ld_add r35, r29, 8 |
| ld_add r36, r29, 8 |
| ld_add r37, r29, 8 |
| ld_add r38, r29, 8 |
| ld_add r39, r29, 8 |
| ld_add r40, r29, 8 |
| ld_add r41, r29, 8 |
| ld_add r42, r29, 8 |
| ld_add r43, r29, 8 |
| ld_add r44, r29, 8 |
| ld_add r45, r29, 8 |
| ld_add r46, r29, 8 |
| ld_add r47, r29, 8 |
| ld_add r48, r29, 8 |
| ld_add r49, r29, 8 |
| ld_add r50, r29, 8 |
| ld_add r51, r29, 8 |
| ld_add r52, r29, 8 |
| ld_add r53, r29, 8 |
| ld lr, r29 |
| addli sp, sp, 256 /* stack_size */ |
| jr lr |
| nop |
| |
| |
| /*----------------------------------------------------*/ |
| /*--- Continuation points ---*/ |
| /*----------------------------------------------------*/ |
| |
| /* ------ Chain me to slow entry point ------ */ |
| .global VG_(disp_cp_chain_me_to_slowEP) |
| VG_(disp_cp_chain_me_to_slowEP): |
| /* We got called. The return address indicates |
| where the patching needs to happen. Collect |
| the return address and, exit back to C land, |
| handing the caller the pair (Chain_me_S, RA) */ |
| # if (VG_TRC_CHAIN_ME_TO_SLOW_EP > 128) |
| # error ("VG_TRC_CHAIN_ME_TO_SLOW_EP is > 128"); |
| # endif |
| moveli r12, VG_TRC_CHAIN_ME_TO_SLOW_EP |
| move r13, lr |
| /* 32 = mkLoadImm_EXACTLY4 |
| 8 = jalr r9 |
| 8 = nop */ |
| addi r13, r13, -40 |
| j postamble |
| |
| /* ------ Chain me to slow entry point ------ */ |
| .global VG_(disp_cp_chain_me_to_fastEP) |
| VG_(disp_cp_chain_me_to_fastEP): |
| /* We got called. The return address indicates |
| where the patching needs to happen. Collect |
| the return address and, exit back to C land, |
| handing the caller the pair (Chain_me_S, RA) */ |
| # if (VG_TRC_CHAIN_ME_TO_FAST_EP > 128) |
| # error ("VG_TRC_CHAIN_ME_TO_FAST_EP is > 128"); |
| # endif |
| moveli r12, VG_TRC_CHAIN_ME_TO_FAST_EP |
| move r13, lr |
| /* 32 = mkLoadImm_EXACTLY4 |
| 8 = jalr r9 |
| 8 = nop */ |
| addi r13, r13, -40 |
| j postamble |
| |
| /* ------ Indirect but boring jump ------ */ |
| .global VG_(disp_cp_xindir) |
| VG_(disp_cp_xindir): |
| /* Where are we going? */ |
| addli r11, r50, OFFSET_tilegx_pc |
| ld r11, r11 |
| |
| moveli r7, hw2_last(VG_(stats__n_xindirs_32)) |
| shl16insli r7, r7, hw1(VG_(stats__n_xindirs_32)) |
| shl16insli r7, r7, hw0(VG_(stats__n_xindirs_32)) |
| ld4u r6, r7 |
| addi r6, r6, 1 |
| st4 r7, r6 |
| |
| /* try a fast lookup in the translation cache */ |
| /* r14 = VG_TT_FAST_HASH(addr) * sizeof(ULong*) |
| = (t8 >> 3 & VG_TT_FAST_MASK) << 3 */ |
| |
| move r14, r11 |
| /* Assume VG_TT_FAST_MASK < 4G */ |
| moveli r12, hw1(VG_TT_FAST_MASK) |
| shl16insli r12, r12, hw0(VG_TT_FAST_MASK) |
| shrui r14, r14, 3 |
| and r14, r14, r12 |
| shli r14, r14, 4 |
| /* Note, each tt_fast hash entry has two pointers i.e. 16 Bytes. */ |
| |
| /* r13 = (addr of VG_(tt_fast)) + r14 */ |
| moveli r13, hw2_last(VG_(tt_fast)) |
| shl16insli r13, r13, hw1(VG_(tt_fast)) |
| shl16insli r13, r13, hw0(VG_(tt_fast)) |
| |
| add r13, r13, r14 |
| |
| /* r12 = VG_(tt_fast)[hash] :: ULong* */ |
| ld_add r12, r13, 8 |
| |
| { |
| ld r25, r13 |
| sub r7, r12, r11 |
| } |
| |
| bnez r7, fast_lookup_failed |
| |
| /* Run the translation */ |
| jr r25 |
| |
| .quad 0x0 |
| |
| fast_lookup_failed: |
| /* %PC is up to date */ |
| /* back out decrement of the dispatch counter */ |
| /* hold dispatch_ctr in t0 (r8) */ |
| |
| moveli r7, hw2_last(VG_(stats__n_xindir_misses_32)) |
| shl16insli r7, r7, hw1(VG_(stats__n_xindir_misses_32)) |
| shl16insli r7, r7, hw0(VG_(stats__n_xindir_misses_32)) |
| ld4u r6, r7 |
| addi r6, r6, 1 |
| st4 r7, r6 |
| moveli r12, VG_TRC_INNER_FASTMISS |
| movei r13, 0 |
| j postamble |
| |
| /* ------ Assisted jump ------ */ |
| .global VG_(disp_cp_xassisted) |
| VG_(disp_cp_xassisted): |
| /* guest-state-pointer contains the TRC. Put the value into the |
| return register */ |
| move r12, r50 |
| movei r13, 0 |
| j postamble |
| |
| /* ------ Event check failed ------ */ |
| .global VG_(disp_cp_evcheck_fail) |
| VG_(disp_cp_evcheck_fail): |
| moveli r12, VG_TRC_INNER_COUNTERZERO |
| movei r13, 0 |
| j postamble |
| |
| .size VG_(disp_run_translations), .-VG_(disp_run_translations) |
| |
| |
| /* Let the linker know we do not need an executable stack */ |
| .section .note.GNU-stack,"",@progbits |
| |
| #endif /* defined(VGP_tilegx_linux) */ |
| /*--------------------------------------------------------------------*/ |
| /*--- end ---*/ |
| /*--------------------------------------------------------------------*/ |
| |
