1 2 /*--------------------------------------------------------------------*/ 3 /*--- The dispatcher. pub_core_dispatch.h ---*/ 4 /*--------------------------------------------------------------------*/ 5 6 /* 7 This file is part of Valgrind, a dynamic binary instrumentation 8 framework. 9 10 Copyright (C) 2000-2017 Julian Seward 11 jseward (at) acm.org 12 13 This program is free software; you can redistribute it and/or 14 modify it under the terms of the GNU General Public License as 15 published by the Free Software Foundation; either version 2 of the 16 License, or (at your option) any later version. 17 18 This program is distributed in the hope that it will be useful, but 19 WITHOUT ANY WARRANTY; without even the implied warranty of 20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 21 General Public License for more details. 22 23 You should have received a copy of the GNU General Public License 24 along with this program; if not, write to the Free Software 25 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 26 02111-1307, USA. 27 28 The GNU General Public License is contained in the file COPYING. 29 */ 30 31 #ifndef __PUB_CORE_DISPATCH_H 32 #define __PUB_CORE_DISPATCH_H 33 34 //-------------------------------------------------------------------- 35 // PURPOSE: This module contains the inner loop of the execution 36 // mechanism, which is: find next basic block, execute it, repeat until 37 // the next bb isn't found in the fast-cache; or if the current bb 38 // exited with a request for some special action before continuing; or 39 // if the current thread has used up its scheduling quantum. 40 //-------------------------------------------------------------------- 41 42 #include "pub_core_dispatch_asm.h" 43 #include "pub_core_basics.h" // Addr 44 45 /* Run translations, with the given guest state, and starting by 46 running the host code at 'host_addr'. It is almost always the case 47 that host_addr is the translation for guest_state.guest_IP, that 48 is, host_addr is what it would be if we looked up the address of 49 the translation corresponding to guest_state.guest_IP. 50 51 The only case where this isn't true is where we're running a 52 no-redir translation. In this case host_addr is the address of the 53 alternative (non-redirected) translation for guest_state.guest_IP. 54 55 The return value must indicate why it returned back to the scheduler. 56 It can also be exited if the executing code throws a non-resumable 57 signal, for example SIGSEGV, in which case control longjmp()s back past 58 here. 59 60 two_words holds the return values (two words). First is 61 a TRC value. Second is generally unused, except in the case 62 where we have to return a chain-me request. 63 */ 64 void VG_(disp_run_translations)( HWord* two_words, 65 volatile void* guest_state, 66 Addr host_addr ); 67 68 /* We need to know addresses of the continuation-point (cp_) labels so 69 we can tell VEX what they are. They will get baked into the code 70 VEX generates. The type is entirely mythical, but we need to 71 state _some_ type, so as to keep gcc happy. */ 72 void VG_(disp_cp_chain_me_to_slowEP)(void); 73 void VG_(disp_cp_chain_me_to_fastEP)(void); 74 void VG_(disp_cp_xindir)(void); 75 void VG_(disp_cp_xassisted)(void); 76 void VG_(disp_cp_evcheck_fail)(void); 77 78 #endif // __PUB_CORE_DISPATCH_H 79 80 /*--------------------------------------------------------------------*/ 81 /*--- end ---*/ 82 /*--------------------------------------------------------------------*/ 83
