coregrind/pub_core_machine.h

   1
   2 /*--------------------------------------------------------------------*/
   3 /*--- Machine-related things.                   pub_core_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_CORE_MACHINE_H
  30 #define __PUB_CORE_MACHINE_H
  31
  32 //--------------------------------------------------------------------
  33 // PURPOSE: This module contains code related to the particular
  34 // architecture, things like accessing guest state, endianness, word size,
  35 // etc.
  36 //--------------------------------------------------------------------
  37
  38 #include "pub_tool_machine.h"
  39 #include "pub_core_basics.h"      // UnwindStartRegs
  40
  41 // XXX: this is *really* the wrong spot for these things
  42 #if defined(VGP_x86_linux) || defined(VGP_x86_solaris) || defined(VGP_x86_freebsd)
  43 #  define VG_ELF_DATA2XXX     ELFDATA2LSB
  44 #  define VG_ELF_MACHINE      EM_386
  45 #  define VG_ELF_CLASS        ELFCLASS32
  46 #  undef  VG_PLAT_USES_PPCTOC
  47 #elif defined(VGP_amd64_linux) || defined(VGP_amd64_solaris) || defined(VGP_amd64_freebsd)
  48 #  define VG_ELF_DATA2XXX     ELFDATA2LSB
  49 #  define VG_ELF_MACHINE      EM_X86_64
  50 #  define VG_ELF_CLASS        ELFCLASS64
  51 #  undef  VG_PLAT_USES_PPCTOC
  52 #elif defined(VGP_ppc32_linux)
  53 #  define VG_ELF_DATA2XXX     ELFDATA2MSB
  54 #  define VG_ELF_MACHINE      EM_PPC
  55 #  define VG_ELF_CLASS        ELFCLASS32
  56 #  undef  VG_PLAT_USES_PPCTOC
  57 #elif defined(VGP_ppc64be_linux)
  58 #  define VG_ELF_DATA2XXX     ELFDATA2MSB
  59 #  define VG_ELF_MACHINE      EM_PPC64
  60 #  define VG_ELF_CLASS        ELFCLASS64
  61 #  define VG_PLAT_USES_PPCTOC 1
  62 #elif defined(VGP_ppc64le_linux)
  63 #  define VG_ELF_DATA2XXX     ELFDATA2LSB
  64 #  define VG_ELF_MACHINE      EM_PPC64
  65 #  define VG_ELF_CLASS        ELFCLASS64
  66 #  undef VG_PLAT_USES_PPCTOC
  67 #elif defined(VGP_arm_linux)
  68 #  define VG_ELF_DATA2XXX     ELFDATA2LSB
  69 #  define VG_ELF_MACHINE      EM_ARM
  70 #  define VG_ELF_CLASS        ELFCLASS32
  71 #  undef  VG_PLAT_USES_PPCTOC
  72 #elif defined(VGP_arm64_linux)
  73 #  define VG_ELF_DATA2XXX     ELFDATA2LSB
  74 #  define VG_ELF_MACHINE      EM_AARCH64
  75 #  define VG_ELF_CLASS        ELFCLASS64
  76 #  undef  VG_PLAT_USES_PPCTOC
  77 #elif defined(VGO_darwin)
  78 #  undef  VG_ELF_DATA2XXX
  79 #  undef  VG_ELF_MACHINE
  80 #  undef  VG_ELF_CLASS
  81 #  undef  VG_PLAT_USES_PPCTOC
  82 #elif defined(VGP_s390x_linux)
  83 #  define VG_ELF_DATA2XXX     ELFDATA2MSB
  84 #  define VG_ELF_MACHINE      EM_S390
  85 #  define VG_ELF_CLASS        ELFCLASS64
  86 #  undef  VG_PLAT_USES_PPCTOC
  87 #elif defined(VGP_mips32_linux)
  88 #  if defined (VG_LITTLEENDIAN)
  89 #    define VG_ELF_DATA2XXX   ELFDATA2LSB
  90 #  elif defined (VG_BIGENDIAN)
  91 #    define VG_ELF_DATA2XXX   ELFDATA2MSB
  92 #  else
  93 #    error "Unknown endianness"
  94 #  endif
  95 #  define VG_ELF_MACHINE      EM_MIPS
  96 #  define VG_ELF_CLASS        ELFCLASS32
  97 #  undef  VG_PLAT_USES_PPCTOC
  98 #elif defined(VGP_mips64_linux)
  99 #  if defined (VG_LITTLEENDIAN)
 100 #    define VG_ELF_DATA2XXX     ELFDATA2LSB
 101 #  elif defined (VG_BIGENDIAN)
 102 #    define VG_ELF_DATA2XXX     ELFDATA2MSB
 103 #  else
 104 #    error "Unknown endianness"
 105 #  endif
 106 #  define VG_ELF_MACHINE      EM_MIPS
 107 #  if defined(VGABI_N32)
 108 #    define VG_ELF_CLASS        ELFCLASS32
 109 #  elif defined(VGABI_64)
 110 #    define VG_ELF_CLASS        ELFCLASS64
 111 #  else
 112 #    error Unknown mips64 abi
 113 #  endif
 114 #  undef  VG_PLAT_USES_PPCTOC
 115 #elif defined(VGP_nanomips_linux)
 116 #  if defined (VG_LITTLEENDIAN)
 117 #    define VG_ELF_DATA2XXX     ELFDATA2LSB
 118 #  elif defined (VG_BIGENDIAN)
 119 #    define VG_ELF_DATA2XXX     ELFDATA2MSB
 120 #  else
 121 #    error "Unknown endianness"
 122 #  endif
 123 #  if !defined(EM_NANOMIPS)
 124 #    define EM_NANOMIPS 249   /* MIPS Tech nanoMIPS */
 125 #  endif
 126 #  define VG_ELF_MACHINE      EM_NANOMIPS
 127 #  define VG_ELF_CLASS        ELFCLASS32
 128 #  undef  VG_PLAT_USES_PPCTOC
 129 #else
 130 #  error Unknown platform
 131 #endif
 132
 133 #if defined(VGA_x86)
 134 #  define VG_INSTR_PTR        guest_EIP
 135 #  define VG_STACK_PTR        guest_ESP
 136 #  define VG_FRAME_PTR        guest_EBP
 137 #elif defined(VGA_amd64)
 138 #  define VG_INSTR_PTR        guest_RIP
 139 #  define VG_STACK_PTR        guest_RSP
 140 #  define VG_FRAME_PTR        guest_RBP
 141 #elif defined(VGA_ppc32)
 142 #  define VG_INSTR_PTR        guest_CIA
 143 #  define VG_STACK_PTR        guest_GPR1
 144 #  define VG_FRAME_PTR        guest_GPR1   // No frame ptr for PPC
 145 #elif defined(VGA_ppc64be) || defined(VGA_ppc64le)
 146 #  define VG_INSTR_PTR        guest_CIA
 147 #  define VG_STACK_PTR        guest_GPR1
 148 #  define VG_FRAME_PTR        guest_GPR1   // No frame ptr for PPC
 149 #elif defined(VGA_arm)
 150 #  define VG_INSTR_PTR        guest_R15T
 151 #  define VG_STACK_PTR        guest_R13
 152 #  define VG_FRAME_PTR        guest_R11
 153 #elif defined(VGA_arm64)
 154 #  define VG_INSTR_PTR        guest_PC
 155 #  define VG_STACK_PTR        guest_XSP
 156 #  define VG_FRAME_PTR        guest_X29   // FIXME: is this right?
 157 #elif defined(VGA_s390x)
 158 #  define VG_INSTR_PTR        guest_IA
 159 #  define VG_STACK_PTR        guest_SP
 160 #  define VG_FRAME_PTR        guest_FP
 161 #  define VG_FPC_REG          guest_fpc
 162 #elif defined(VGA_mips32) || defined(VGA_mips64) || defined(VGA_nanomips)
 163 #  define VG_INSTR_PTR        guest_PC
 164 #  define VG_STACK_PTR        guest_r29
 165 #  define VG_FRAME_PTR        guest_r30
 166 #else
 167 #  error Unknown arch
 168 #endif
 169
 170
 171 // Offsets for the Vex state
 172 #define VG_O_STACK_PTR        (offsetof(VexGuestArchState, VG_STACK_PTR))
 173 #define VG_O_INSTR_PTR        (offsetof(VexGuestArchState, VG_INSTR_PTR))
 174 #define VG_O_FRAME_PTR        (offsetof(VexGuestArchState, VG_FRAME_PTR))
 175 #define VG_O_FPC_REG          (offsetof(VexGuestArchState, VG_FPC_REG))
 176
 177
 178 //-------------------------------------------------------------
 179 // Guest state accessors that are not visible to tools.  The only
 180 // ones that are visible are get_IP and get_SP.
 181
 182 //Addr VG_(get_IP) ( ThreadId tid );  // in pub_tool_machine.h
 183 //Addr VG_(get_SP) ( ThreadId tid );  // in pub_tool_machine.h
 184 Addr VG_(get_FP) ( ThreadId tid );
 185
 186 void VG_(set_IP) ( ThreadId tid, Addr encip );
 187 void VG_(set_SP) ( ThreadId tid, Addr sp );
 188
 189
 190 //-------------------------------------------------------------
 191 // Get hold of the values needed for a stack unwind, for the specified
 192 // (client) thread.
 193 void VG_(get_UnwindStartRegs) ( /*OUT*/UnwindStartRegs* regs,
 194                                 ThreadId tid );
 195
 196
 197 //-------------------------------------------------------------
 198 /* Details about the capabilities of the underlying (host) CPU.  These
 199    details are acquired by (1) enquiring with the CPU at startup, or
 200    (2) from the AT_SYSINFO entries the kernel gave us (ppc cache
 201    line size).  It's a bit nasty in the sense that there's no obvious
 202    way to stop uses of some of this info before it's ready to go.
 203
 204    Current dependencies are:
 205
 206    x86:   initially:  call VG_(machine_get_hwcaps)
 207
 208           then safe to use VG_(machine_get_VexArchInfo)
 209                        and VG_(machine_x86_have_mxcsr)
 210    -------------
 211    amd64: initially:  call VG_(machine_get_hwcaps)
 212
 213           then safe to use VG_(machine_get_VexArchInfo)
 214    -------------
 215    ppc32: initially:  call VG_(machine_get_hwcaps)
 216                       call VG_(machine_ppc32_set_clszB)
 217
 218           then safe to use VG_(machine_get_VexArchInfo)
 219                        and VG_(machine_ppc32_has_FP)
 220                        and VG_(machine_ppc32_has_VMX)
 221    -------------
 222    ppc64: initially:  call VG_(machine_get_hwcaps)
 223                       call VG_(machine_ppc64_set_clszB)
 224                       call VG_(machine_ppc64_set_scv_support)
 225
 226           then safe to use VG_(machine_get_VexArchInfo)
 227                        and VG_(machine_ppc64_has_VMX)
 228    -------------
 229    arm:   initially:  call VG_(machine_get_hwcaps)
 230                       call VG_(machine_arm_set_has_NEON)
 231
 232           then safe to use VG_(machine_get_VexArchInfo)
 233    -------------
 234    s390x: initially:  call VG_(machine_get_hwcaps)
 235
 236           then safe to use VG_(machine_get_VexArchInfo)
 237
 238    VG_(machine_get_hwcaps) may use signals (although it attempts to
 239    leave signal state unchanged) and therefore should only be
 240    called before m_main sets up the client's signal state.
 241 */
 242
 243 /* Determine what insn set and insn set variant the host has, and
 244    record it.  To be called once at system startup.  Returns False if
 245    this a CPU incapable of running Valgrind. */
 246 extern Bool VG_(machine_get_hwcaps)( void );
 247
 248 /* Determine information about the cache system this host has and
 249    record it. Returns False, if cache information cannot be auto-detected. */
 250 extern Bool VG_(machine_get_cache_info)( VexArchInfo * );
 251
 252 /* Notify host cpu cache line size, as per above comment. */
 253 #if defined(VGA_ppc32)
 254 extern void VG_(machine_ppc32_set_clszB)( Int );
 255 #endif
 256
 257 #if defined(VGA_ppc64be) || defined(VGA_ppc64le)
 258 extern void VG_(machine_ppc64_set_clszB)( Int );
 259 extern void VG_(machine_ppc64_set_scv_support)( Int );
 260 #endif
 261
 262 #if defined(VGA_arm)
 263 extern void VG_(machine_arm_set_has_NEON)( Bool );
 264 #endif
 265
 266 /* X86: set to 1 if the host is able to do {ld,st}mxcsr (load/store
 267    the SSE control/status register), else zero.  Is referenced from
 268    assembly code, so do not change from a 32-bit int. */
 269 #if defined(VGA_x86)
 270 extern UInt VG_(machine_x86_have_mxcsr);
 271 #endif
 272
 273 /* PPC32: set to 1 if FP instructions are supported in user-space,
 274    else 0.  Is referenced from assembly code, so do not change from a
 275    32-bit int. */
 276 #if defined(VGA_ppc32)
 277 extern UInt VG_(machine_ppc32_has_FP);
 278 #endif
 279
 280 /* PPC32: set to 1 if Altivec instructions are supported in
 281    user-space, else 0.  Is referenced from assembly code, so do not
 282    change from a 32-bit int. */
 283 #if defined(VGA_ppc32)
 284 extern UInt VG_(machine_ppc32_has_VMX);
 285 #endif
 286
 287 /* PPC64: set to 1 if Altivec instructions are supported in
 288    user-space, else 0.  Is referenced from assembly code, so do not
 289    change from a 64-bit int. */
 290 #if defined(VGA_ppc64be) || defined(VGA_ppc64le)
 291 extern ULong VG_(machine_ppc64_has_VMX);
 292 #endif
 293
 294 #if defined(VGA_arm)
 295 extern Int VG_(machine_arm_archlevel);
 296 #endif
 297
 298 #endif   // __PUB_CORE_MACHINE_H
 299
 300 /*--------------------------------------------------------------------*/
 301 /*--- end                                                          ---*/
 302 /*--------------------------------------------------------------------*/