1 2 /*--------------------------------------------------------------------*/ 3 /*--- The trampoline code page. pub_core_trampoline.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, 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_TRAMPOLINE_H 32 #define __PUB_CORE_TRAMPOLINE_H 33 34 #include "pub_core_basics.h" // VG_ macro 35 36 //-------------------------------------------------------------------- 37 // PURPOSE: This module defines a few replacement functions for Linux 38 // vsyscalls, which we can't implement directly. It also contains 39 // stubs for signal returns. Note, all the code within runs on the 40 // simulated CPU. The vsyscall stubs are gotten to by use of the 41 // redirect mechanism. 42 // 43 // Note: generally, putting replacement functions in here is a bad 44 // idea, since any Dwarf frame-unwind info attached to them will not 45 // be seen by the unwinder in gcc's runtime support. This means 46 // unwinding during exception handling by gcc tends to fail if it 47 // encounters one of these replacement functions. A better place to 48 // put them is in one of the .so's preloaded into the client, since 49 // the client's ld.so will know about it and so gcc's unwinder 50 // (somehow) is able to get hold of it. 51 //-------------------------------------------------------------------- 52 53 /* These two delimit our handwritten assembly code, so we can tell 54 tools which track memory that this area should be regarded as 55 readable, at least. Otherwise Memcheck complains we're jumping to 56 invalid addresses. */ 57 58 extern Addr VG_(trampoline_stuff_start); 59 extern Addr VG_(trampoline_stuff_end); 60 61 #if defined(VGP_x86_linux) 62 extern Addr VG_(x86_linux_SUBST_FOR_sigreturn); 63 extern Addr VG_(x86_linux_SUBST_FOR_rt_sigreturn); 64 extern Char* VG_(x86_linux_REDIR_FOR_index) ( const Char*, Int ); 65 extern UInt VG_(x86_linux_REDIR_FOR_strlen)( void* ); 66 #endif 67 68 #if defined(VGP_amd64_linux) 69 extern Addr VG_(amd64_linux_SUBST_FOR_rt_sigreturn); 70 extern Addr VG_(amd64_linux_REDIR_FOR_vgettimeofday); 71 extern Addr VG_(amd64_linux_REDIR_FOR_vtime); 72 extern Addr VG_(amd64_linux_REDIR_FOR_vgetcpu); 73 extern UInt VG_(amd64_linux_REDIR_FOR_strlen)( void* ); 74 extern Char* VG_(amd64_linux_REDIR_FOR_index) ( const Char*, Int ); 75 #endif 76 77 #if defined(VGP_ppc32_linux) 78 extern Addr VG_(ppc32_linux_SUBST_FOR_sigreturn); 79 extern Addr VG_(ppc32_linux_SUBST_FOR_rt_sigreturn); 80 extern UInt VG_(ppc32_linux_REDIR_FOR_strlen)( void* ); 81 extern UInt VG_(ppc32_linux_REDIR_FOR_strcmp)( void*, void* ); 82 extern void* VG_(ppc32_linux_REDIR_FOR_strchr)( void*, Int ); 83 #endif 84 85 #if defined(VGP_ppc64be_linux) || defined(VGP_ppc64le_linux) 86 extern Addr VG_(ppc64_linux_SUBST_FOR_rt_sigreturn); 87 extern UInt VG_(ppc64_linux_REDIR_FOR_strlen)( void* ); 88 extern void* VG_(ppc64_linux_REDIR_FOR_strchr)( void*, Int ); 89 /* A label (sans dot) marking the ultra-magical return stub via which 90 all redirected and wrapped functions are made to "return" on 91 ppc64-linux. The one insn at this label is never really 92 translated. Instead, m_translate generates IR to restore the 93 thread's LR and R2 registers from a small stack in the ppc64 guest 94 state structure, and then branch to LR. Convoluted? Confusing? 95 You betcha. Could I think of anything simpler? No. */ 96 extern Addr VG_(ppctoc_magic_redirect_return_stub); 97 #endif 98 99 #if defined(VGP_arm_linux) 100 extern Addr VG_(arm_linux_SUBST_FOR_sigreturn); 101 extern Addr VG_(arm_linux_SUBST_FOR_rt_sigreturn); 102 extern UInt VG_(arm_linux_REDIR_FOR_strlen)( void* ); 103 //extern void* VG_(arm_linux_REDIR_FOR_index) ( void*, Int ); 104 extern void* VG_(arm_linux_REDIR_FOR_memcpy)( void*, void*, Int ); 105 extern void* VG_(arm_linux_REDIR_FOR_strcmp)( void*, void* ); 106 #endif 107 108 #if defined(VGP_arm64_linux) 109 extern Addr VG_(arm64_linux_SUBST_FOR_rt_sigreturn); 110 extern ULong VG_(arm64_linux_REDIR_FOR_strlen)( void* ); 111 extern void* VG_(arm64_linux_REDIR_FOR_index) ( void*, Long ); 112 extern Long VG_(arm64_linux_REDIR_FOR_strcmp)( void*, void* ); 113 #endif 114 115 #if defined(VGP_x86_darwin) 116 extern Addr VG_(x86_darwin_SUBST_FOR_sigreturn); 117 extern SizeT VG_(x86_darwin_REDIR_FOR_strlen)( void* ); 118 extern SizeT VG_(x86_darwin_REDIR_FOR_strcmp)( void*, void* ); 119 extern void* VG_(x86_darwin_REDIR_FOR_strcat)( void*, void * ); 120 extern char* VG_(x86_darwin_REDIR_FOR_strcpy)( char *s1, char *s2 ); 121 extern SizeT VG_(x86_darwin_REDIR_FOR_strlcat)( char *s1, const char *s2, 122 SizeT size ); 123 #endif 124 125 #if defined(VGP_amd64_darwin) 126 extern Addr VG_(amd64_darwin_SUBST_FOR_sigreturn); 127 extern SizeT VG_(amd64_darwin_REDIR_FOR_strlen)( void* ); 128 extern SizeT VG_(amd64_darwin_REDIR_FOR_strcmp)( void*, void* ); 129 extern void* VG_(amd64_darwin_REDIR_FOR_strcat)( void*, void * ); 130 extern char* VG_(amd64_darwin_REDIR_FOR_strcpy)( char *s1, char *s2 ); 131 extern SizeT VG_(amd64_darwin_REDIR_FOR_strlcat)( char *s1, const char *s2, 132 SizeT size ); 133 extern UInt VG_(amd64_darwin_REDIR_FOR_arc4random)( void ); 134 # if DARWIN_VERS == DARWIN_10_9 135 extern char* VG_(amd64_darwin_REDIR_FOR_strchr)( const char*, int ); 136 # endif 137 #endif 138 139 #if defined(VGP_s390x_linux) 140 extern Addr VG_(s390x_linux_SUBST_FOR_sigreturn); 141 extern Addr VG_(s390x_linux_SUBST_FOR_rt_sigreturn); 142 // Note: Long for the 2nd parameter because according to z-series ABI, 143 // section "Parameter Passing" SIMPLE_ARG: 144 // "Values shorter than 64 bits are sign- or zero-extended 145 // (as appropriate) to 64 bits." 146 extern void* VG_(s390x_linux_REDIR_FOR_index) ( void*, Long ); 147 #endif 148 149 #if defined(VGP_mips32_linux) 150 extern Addr VG_(mips32_linux_SUBST_FOR_sigreturn); 151 extern Addr VG_(mips32_linux_SUBST_FOR_rt_sigreturn); 152 extern Char* VG_(mips32_linux_REDIR_FOR_index)( const Char*, Int ); 153 extern UInt VG_(mips32_linux_REDIR_FOR_strlen)( void* ); 154 #endif 155 156 #if defined(VGP_mips64_linux) 157 extern Addr VG_(mips64_linux_SUBST_FOR_rt_sigreturn); 158 extern Char* VG_(mips64_linux_REDIR_FOR_index)( const Char*, Int ); 159 extern UInt VG_(mips64_linux_REDIR_FOR_strlen)( void* ); 160 #endif 161 162 #if defined(VGP_x86_solaris) 163 extern SizeT VG_(x86_solaris_REDIR_FOR_strcmp)(const HChar *, const HChar *); 164 extern SizeT VG_(x86_solaris_REDIR_FOR_strlen)(const HChar *); 165 #endif 166 167 #if defined(VGP_amd64_solaris) 168 extern HChar *VG_(amd64_solaris_REDIR_FOR_strcpy)(HChar *, const HChar *); 169 extern HChar *VG_(amd64_solaris_REDIR_FOR_strncpy)(HChar *, const HChar *, 170 SizeT); 171 extern Int VG_(amd64_solaris_REDIR_FOR_strcmp)(const HChar *, const HChar *); 172 extern HChar *VG_(amd64_solaris_REDIR_FOR_strcat)(HChar *, const HChar *); 173 extern SizeT VG_(amd64_solaris_REDIR_FOR_strlen)(const HChar *); 174 #endif 175 176 #endif // __PUB_CORE_TRAMPOLINE_H 177 178 /*--------------------------------------------------------------------*/ 179 /*--- end ---*/ 180 /*--------------------------------------------------------------------*/ 181