1 2 /*--------------------------------------------------------------------*/ 3 /*--- Machine-related stuff. pub_tool_machine.h ---*/ 4 /*--------------------------------------------------------------------*/ 5 6 /* 7 This file is part of Valgrind, a dynamic binary instrumentation 8 framework. 9 10 Copyright (C) 2000-2010 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_TOOL_MACHINE_H 32 #define __PUB_TOOL_MACHINE_H 33 34 #if defined(VGP_x86_linux) 35 # define VG_MIN_INSTR_SZB 1 // min length of native instruction 36 # define VG_MAX_INSTR_SZB 16 // max length of native instruction 37 # define VG_CLREQ_SZB 14 // length of a client request, may 38 // be larger than VG_MAX_INSTR_SZB 39 # define VG_STACK_REDZONE_SZB 0 // number of addressable bytes below %RSP 40 41 #elif defined(VGP_amd64_linux) 42 # define VG_MIN_INSTR_SZB 1 43 # define VG_MAX_INSTR_SZB 16 44 # define VG_CLREQ_SZB 19 45 # define VG_STACK_REDZONE_SZB 128 46 47 #elif defined(VGP_ppc32_linux) 48 # define VG_MIN_INSTR_SZB 4 49 # define VG_MAX_INSTR_SZB 4 50 # define VG_CLREQ_SZB 20 51 # define VG_STACK_REDZONE_SZB 0 52 53 #elif defined(VGP_ppc64_linux) 54 # define VG_MIN_INSTR_SZB 4 55 # define VG_MAX_INSTR_SZB 4 56 # define VG_CLREQ_SZB 20 57 # define VG_STACK_REDZONE_SZB 288 // number of addressable bytes below R1 58 // from 64-bit PowerPC ELF ABI 59 // Supplement 1.7 60 61 #elif defined(VGP_arm_linux) 62 # define VG_MIN_INSTR_SZB 2 63 # define VG_MAX_INSTR_SZB 4 64 # define VG_CLREQ_SZB 20 65 # define VG_STACK_REDZONE_SZB 0 66 67 #elif defined(VGP_ppc32_aix5) 68 # define VG_MIN_INSTR_SZB 4 69 # define VG_MAX_INSTR_SZB 4 70 # define VG_CLREQ_SZB 20 71 /* The PowerOpen ABI actually says 220 bytes, but that is not an 72 8-aligned number, and frequently forces Memcheck's 73 mc_{new,die}_mem_stack_N routines into slow cases by losing 74 8-alignment of the area to be messed with. So let's just say 75 224 instead. Gdb has a similar kludge. */ 76 # define VG_STACK_REDZONE_SZB 224 77 78 #elif defined(VGP_ppc64_aix5) 79 # define VG_MIN_INSTR_SZB 4 80 # define VG_MAX_INSTR_SZB 4 81 # define VG_CLREQ_SZB 20 82 # define VG_STACK_REDZONE_SZB 288 // is this right? 83 84 #elif defined(VGP_x86_darwin) 85 # define VG_MIN_INSTR_SZB 1 // min length of native instruction 86 # define VG_MAX_INSTR_SZB 16 // max length of native instruction 87 # define VG_CLREQ_SZB 14 // length of a client request, may 88 // be larger than VG_MAX_INSTR_SZB 89 # define VG_STACK_REDZONE_SZB 0 // number of addressable bytes below %RSP 90 91 #elif defined(VGP_amd64_darwin) 92 # define VG_MIN_INSTR_SZB 1 93 # define VG_MAX_INSTR_SZB 16 94 # define VG_CLREQ_SZB 19 95 # define VG_STACK_REDZONE_SZB 128 96 97 #else 98 # error Unknown platform 99 #endif 100 101 // Guest state accessors 102 // Are mostly in the core_ header. 103 // Only these two are available to tools. 104 Addr VG_(get_IP) ( ThreadId tid ); 105 Addr VG_(get_SP) ( ThreadId tid ); 106 107 108 // For get/set, 'area' is where the asked-for guest state will be copied 109 // into/from. If shadowNo == 0, the real (non-shadow) guest state is 110 // accessed. If shadowNo == 1, the first shadow area is accessed, and 111 // if shadowNo == 2, the second shadow area is accessed. This gives a 112 // completely general way to read/modify a thread's guest register state 113 // providing you know the offsets you need. 114 void 115 VG_(get_shadow_regs_area) ( ThreadId tid, 116 /*DST*/UChar* dst, 117 /*SRC*/Int shadowNo, PtrdiffT offset, SizeT size ); 118 void 119 VG_(set_shadow_regs_area) ( ThreadId tid, 120 /*DST*/Int shadowNo, PtrdiffT offset, SizeT size, 121 /*SRC*/const UChar* src ); 122 123 // Sets the shadow values for the syscall return value register(s). 124 // This is platform specific. 125 void VG_(set_syscall_return_shadows) ( ThreadId tid, 126 /* shadow vals for the result */ 127 UWord s1res, UWord s2res, 128 /* shadow vals for the error val */ 129 UWord s1err, UWord s2err ); 130 131 // Apply a function 'f' to all the general purpose registers in all the 132 // current threads. 133 // This is very Memcheck-specific -- it's used to find the roots when 134 // doing leak checking. 135 extern void VG_(apply_to_GP_regs)(void (*f)(UWord val)); 136 137 // This iterator lets you inspect each live thread's stack bounds. 138 // Returns False at the end. 'tid' is the iterator and you can only 139 // safely change it by making calls to these functions. 140 extern void VG_(thread_stack_reset_iter) ( /*OUT*/ThreadId* tid ); 141 extern Bool VG_(thread_stack_next) ( /*MOD*/ThreadId* tid, 142 /*OUT*/Addr* stack_min, 143 /*OUT*/Addr* stack_max ); 144 145 // Returns .client_stack_highest_word for the given thread 146 extern Addr VG_(thread_get_stack_max) ( ThreadId tid ); 147 148 // Returns how many bytes have been allocated for the stack of the given thread 149 extern SizeT VG_(thread_get_stack_size) ( ThreadId tid ); 150 151 // Returns the bottommost address of the alternate signal stack. 152 // See also the man page of sigaltstack(). 153 extern Addr VG_(thread_get_altstack_min) ( ThreadId tid ); 154 155 // Returns how many bytes have been allocated for the alternate signal stack. 156 // See also the man page of sigaltstack(). 157 extern SizeT VG_(thread_get_altstack_size) ( ThreadId tid ); 158 159 // Given a pointer to a function as obtained by "& functionname" in C, 160 // produce a pointer to the actual entry point for the function. For 161 // most platforms it's the identity function. Unfortunately, on 162 // ppc64-linux it isn't (sigh). 163 extern void* VG_(fnptr_to_fnentry)( void* ); 164 165 #endif // __PUB_TOOL_MACHINE_H 166 167 /*--------------------------------------------------------------------*/ 168 /*--- end ---*/ 169 /*--------------------------------------------------------------------*/ 170
