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) 2000-2013 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_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 #endif 75 76 #if defined(VGP_ppc32_linux) 77 extern Addr VG_(ppc32_linux_SUBST_FOR_sigreturn); 78 extern Addr VG_(ppc32_linux_SUBST_FOR_rt_sigreturn); 79 extern UInt VG_(ppc32_linux_REDIR_FOR_strlen)( void* ); 80 extern UInt VG_(ppc32_linux_REDIR_FOR_strcmp)( void*, void* ); 81 extern void* VG_(ppc32_linux_REDIR_FOR_strchr)( void*, Int ); 82 #endif 83 84 #if defined(VGP_ppc64be_linux) || defined(VGP_ppc64le_linux) 85 extern Addr VG_(ppc64_linux_SUBST_FOR_rt_sigreturn); 86 extern UInt VG_(ppc64_linux_REDIR_FOR_strlen)( void* ); 87 extern void* VG_(ppc64_linux_REDIR_FOR_strchr)( void*, Int ); 88 /* A label (sans dot) marking the ultra-magical return stub via which 89 all redirected and wrapped functions are made to "return" on 90 ppc64-linux. The one insn at this label is never really 91 translated. Instead, m_translate generates IR to restore the 92 thread's LR and R2 registers from a small stack in the ppc64 guest 93 state structure, and then branch to LR. Convoluted? Confusing? 94 You betcha. Could I think of anything simpler? No. */ 95 extern Addr VG_(ppctoc_magic_redirect_return_stub); 96 #endif 97 98 #if defined(VGP_arm_linux) 99 extern Addr VG_(arm_linux_SUBST_FOR_sigreturn); 100 extern Addr VG_(arm_linux_SUBST_FOR_rt_sigreturn); 101 extern UInt VG_(arm_linux_REDIR_FOR_strlen)( void* ); 102 //extern void* VG_(arm_linux_REDIR_FOR_index) ( void*, Int ); 103 extern void* VG_(arm_linux_REDIR_FOR_memcpy)( void*, void*, Int ); 104 extern void* VG_(arm_linux_REDIR_FOR_strcmp)( void*, void* ); 105 #endif 106 107 #if defined(VGP_tilegx_linux) 108 extern Addr VG_(tilegx_linux_SUBST_FOR_rt_sigreturn); 109 extern UInt VG_(tilegx_linux_REDIR_FOR_strlen)( void* ); 110 #endif 111 112 #if defined(VGP_arm64_linux) 113 extern Addr VG_(arm64_linux_SUBST_FOR_rt_sigreturn); 114 extern ULong VG_(arm64_linux_REDIR_FOR_strlen)( void* ); 115 extern void* VG_(arm64_linux_REDIR_FOR_index) ( void*, Long ); 116 extern Long VG_(arm64_linux_REDIR_FOR_strcmp)( void*, void* ); 117 #endif 118 119 #if defined(VGP_x86_darwin) 120 extern Addr VG_(x86_darwin_SUBST_FOR_sigreturn); 121 extern SizeT VG_(x86_darwin_REDIR_FOR_strlen)( void* ); 122 extern SizeT VG_(x86_darwin_REDIR_FOR_strcmp)( void*, void* ); 123 extern void* VG_(x86_darwin_REDIR_FOR_strcat)( void*, void * ); 124 extern char* VG_(x86_darwin_REDIR_FOR_strcpy)( char *s1, char *s2 ); 125 extern SizeT VG_(x86_darwin_REDIR_FOR_strlcat)( char *s1, const char *s2, 126 SizeT size ); 127 #endif 128 129 #if defined(VGP_amd64_darwin) 130 extern Addr VG_(amd64_darwin_SUBST_FOR_sigreturn); 131 extern SizeT VG_(amd64_darwin_REDIR_FOR_strlen)( void* ); 132 extern SizeT VG_(amd64_darwin_REDIR_FOR_strcmp)( void*, void* ); 133 extern void* VG_(amd64_darwin_REDIR_FOR_strcat)( void*, void * ); 134 extern char* VG_(amd64_darwin_REDIR_FOR_strcpy)( char *s1, char *s2 ); 135 extern SizeT VG_(amd64_darwin_REDIR_FOR_strlcat)( char *s1, const char *s2, 136 SizeT size ); 137 extern UInt VG_(amd64_darwin_REDIR_FOR_arc4random)( void ); 138 # if DARWIN_VERS == DARWIN_10_9 139 extern char* VG_(amd64_darwin_REDIR_FOR_strchr)( const char*, int ); 140 # endif 141 #endif 142 143 #if defined(VGP_s390x_linux) 144 extern Addr VG_(s390x_linux_SUBST_FOR_sigreturn); 145 extern Addr VG_(s390x_linux_SUBST_FOR_rt_sigreturn); 146 // Note: Long for the 2nd parameter because according to z-series ABI, 147 // section "Parameter Passing" SIMPLE_ARG: 148 // "Values shorter than 64 bits are sign- or zero-extended 149 // (as appropriate) to 64 bits." 150 extern void* VG_(s390x_linux_REDIR_FOR_index) ( void*, Long ); 151 #endif 152 153 #if defined(VGP_mips32_linux) 154 extern Addr VG_(mips32_linux_SUBST_FOR_sigreturn); 155 extern Addr VG_(mips32_linux_SUBST_FOR_rt_sigreturn); 156 extern UInt VG_(mips32_linux_REDIR_FOR_strlen)( void* ); 157 #endif 158 159 #if defined(VGP_mips64_linux) 160 extern Addr VG_(mips64_linux_SUBST_FOR_rt_sigreturn); 161 extern UInt VG_(mips64_linux_REDIR_FOR_strlen)( void* ); 162 #endif 163 164 #endif // __PUB_CORE_TRAMPOLINE_H 165 166 /*--------------------------------------------------------------------*/ 167 /*--- end ---*/ 168 /*--------------------------------------------------------------------*/ 169
