include/pub_tool_machine.h

   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) 2000-2017 Julian Seward
  11       jseward@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, see <http://www.gnu.org/licenses/>.
  25
  26    The GNU General Public License is contained in the file COPYING.
  27 */
  28
  29 #ifndef __PUB_TOOL_MACHINE_H
  30 #define __PUB_TOOL_MACHINE_H
  31
  32 #include "pub_tool_basics.h"           // ThreadID
  33 #include "libvex.h"                    // VexArchInfo
  34
  35 #if defined(VGP_x86_linux) || defined(VGP_x86_solaris) || defined(VGP_x86_freebsd)
  36 #  define VG_MIN_INSTR_SZB          1  // min length of native instruction
  37 #  define VG_MAX_INSTR_SZB         16  // max length of native instruction
  38 #  define VG_CLREQ_SZB             14  // length of a client request, may
  39                                        //   be larger than VG_MAX_INSTR_SZB
  40 #  define VG_STACK_REDZONE_SZB      0  // number of addressable bytes below %RSP
  41
  42 #elif defined(VGP_amd64_linux) || defined(VGP_amd64_solaris) || defined(VGP_amd64_freebsd)
  43 #  define VG_MIN_INSTR_SZB          1
  44 #  define VG_MAX_INSTR_SZB         16
  45 #  define VG_CLREQ_SZB             19
  46 #  define VG_STACK_REDZONE_SZB    128
  47
  48 #elif defined(VGP_ppc32_linux)
  49 #  define VG_MIN_INSTR_SZB          4
  50 #  define VG_MAX_INSTR_SZB          4
  51 #  define VG_CLREQ_SZB             20
  52 #  define VG_STACK_REDZONE_SZB      0
  53
  54 #elif defined(VGP_ppc64be_linux)  || defined(VGP_ppc64le_linux)
  55 #  define VG_MIN_INSTR_SZB          4
  56 #  define VG_MAX_INSTR_SZB          8 // Prefix inst 8 bytes, word inst 4 bytes
  57 #  define VG_CLREQ_SZB             20
  58 #  define VG_STACK_REDZONE_SZB    288  // number of addressable bytes below R1
  59                                        // from 64-bit PowerPC ELF ABI
  60                                        // Supplement 1.7
  61
  62 #elif defined(VGP_arm_linux)
  63 #  define VG_MIN_INSTR_SZB          2
  64 #  define VG_MAX_INSTR_SZB          4
  65 #  define VG_CLREQ_SZB             20
  66 #  define VG_STACK_REDZONE_SZB      0
  67
  68 #elif defined(VGP_arm64_linux) || defined(VGP_arm64_freebsd)
  69 #  define VG_MIN_INSTR_SZB          4
  70 #  define VG_MAX_INSTR_SZB          4
  71 #  define VG_CLREQ_SZB             20
  72 #  define VG_STACK_REDZONE_SZB      0
  73
  74 #elif defined(VGP_s390x_linux)
  75 #  define VG_MIN_INSTR_SZB          2
  76 #  define VG_MAX_INSTR_SZB          6
  77 #  define VG_CLREQ_SZB             10
  78 #  define VG_STACK_REDZONE_SZB      0  // s390 has no redzone
  79
  80 #elif defined(VGP_x86_darwin)
  81 #  define VG_MIN_INSTR_SZB          1  // min length of native instruction
  82 #  define VG_MAX_INSTR_SZB         16  // max length of native instruction
  83 #  define VG_CLREQ_SZB             14  // length of a client request, may
  84                                        //   be larger than VG_MAX_INSTR_SZB
  85 #  define VG_STACK_REDZONE_SZB      0  // number of addressable bytes below %RSP
  86
  87 #elif defined(VGP_amd64_darwin)
  88 #  define VG_MIN_INSTR_SZB          1
  89 #  define VG_MAX_INSTR_SZB         16
  90 #  define VG_CLREQ_SZB             19
  91 #  define VG_STACK_REDZONE_SZB    128
  92
  93 #elif defined(VGP_mips32_linux)
  94 #  define VG_MIN_INSTR_SZB          4
  95 #  define VG_MAX_INSTR_SZB          8
  96 #  define VG_CLREQ_SZB             20
  97 #  define VG_STACK_REDZONE_SZB      0
  98
  99 #elif defined(VGP_mips64_linux)
 100 #  define VG_MIN_INSTR_SZB          4
 101 #  define VG_MAX_INSTR_SZB          8
 102 #  define VG_CLREQ_SZB             20
 103 #  define VG_STACK_REDZONE_SZB      0
 104
 105 #elif defined(VGP_nanomips_linux)
 106 #  define VG_MIN_INSTR_SZB          2
 107 #  define VG_MAX_INSTR_SZB          6
 108 #  define VG_CLREQ_SZB             20
 109 #  define VG_STACK_REDZONE_SZB      0
 110
 111 #else
 112 #  error Unknown platform
 113 #endif
 114
 115 // Guest state accessors
 116 // Are mostly in the core_ header.
 117 //  Only these two are available to tools.
 118 Addr VG_(get_IP) ( ThreadId tid );
 119 Addr VG_(get_SP) ( ThreadId tid );
 120
 121 // Get and set the shadow1 SP register
 122 Addr VG_(get_SP_s1) ( ThreadId tid );
 123 void VG_(set_SP_s1) ( ThreadId tid, Addr sp );
 124
 125 // For get/set, 'area' is where the asked-for guest state will be copied
 126 // into/from.  If shadowNo == 0, the real (non-shadow) guest state is
 127 // accessed.  If shadowNo == 1, the first shadow area is accessed, and
 128 // if shadowNo == 2, the second shadow area is accessed.  This gives a
 129 // completely general way to read/modify a thread's guest register state
 130 // providing you know the offsets you need.
 131 void
 132 VG_(get_shadow_regs_area) ( ThreadId tid,
 133                             /*DST*/UChar* dst,
 134                             /*SRC*/Int shadowNo, PtrdiffT offset, SizeT size );
 135 void
 136 VG_(set_shadow_regs_area) ( ThreadId tid,
 137                             /*DST*/Int shadowNo, PtrdiffT offset, SizeT size,
 138                             /*SRC*/const UChar* src );
 139
 140 // Apply a function 'f' to all the general purpose registers in all the
 141 // current threads. This is all live threads, or (when the process is exiting)
 142 // all threads that were instructed to die by the thread calling exit.
 143 // This is very Memcheck-specific -- it's used to find the roots when
 144 // doing leak checking.
 145 extern void VG_(apply_to_GP_regs)(void (*f)(ThreadId tid,
 146                                             const HChar* regname, UWord val));
 147
 148 // This iterator lets you inspect each live thread's stack bounds.
 149 // Returns False at the end.  'tid' is the iterator and you can only
 150 // safely change it by making calls to these functions.
 151 extern void VG_(thread_stack_reset_iter) ( /*OUT*/ThreadId* tid );
 152 // stack_min is the address of the lowest stack byte,
 153 // stack_max is the address of the highest stack byte.
 154 // In other words, the live stack is [stack_min, stack_max].
 155 extern Bool VG_(thread_stack_next)       ( /*MOD*/ThreadId* tid,
 156                                            /*OUT*/Addr* stack_min,
 157                                            /*OUT*/Addr* stack_max );
 158
 159 // Returns .client_stack_highest_byte for the given thread
 160 // i.e. the highest addressable byte of the stack.
 161 extern Addr VG_(thread_get_stack_max) ( ThreadId tid );
 162
 163 // Returns how many bytes have been allocated for the stack of the given thread
 164 extern SizeT VG_(thread_get_stack_size) ( ThreadId tid );
 165
 166 // Returns the lowest address of the alternate signal stack.
 167 // See also the man page of sigaltstack().
 168 extern Addr VG_(thread_get_altstack_min) ( ThreadId tid );
 169
 170 // Returns how many bytes have been allocated for the alternate signal stack.
 171 // See also the man page of sigaltstack().
 172 extern SizeT VG_(thread_get_altstack_size) ( ThreadId tid );
 173
 174 // Given a pointer to a function as obtained by "& functionname" in C,
 175 // produce a pointer to the actual entry point for the function.  For
 176 // most platforms it's the identity function.  Unfortunately, on
 177 // ppc64-linux it isn't (sigh).
 178 extern void* VG_(fnptr_to_fnentry)( void* );
 179
 180 /* Returns the size of the largest guest register that we will
 181    simulate in this run.  This depends on both the guest architecture
 182    and on the specific capabilities we are simulating for that guest
 183    (eg, AVX or non-AVX ?, for amd64). */
 184 extern Int VG_(machine_get_size_of_largest_guest_register) ( void );
 185
 186 /* Return host cpu info. */
 187 extern void VG_(machine_get_VexArchInfo)( /*OUT*/VexArch*,
 188                                           /*OUT*/VexArchInfo* );
 189
 190 #endif   // __PUB_TOOL_MACHINE_H
 191
 192 /*--------------------------------------------------------------------*/
 193 /*--- end                                                          ---*/
 194 /*--------------------------------------------------------------------*/