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@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_ppc64_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 #endif 105 106 #if defined(VGP_arm64_linux) 107 extern Addr VG_(arm64_linux_SUBST_FOR_rt_sigreturn); 108 extern ULong VG_(arm64_linux_REDIR_FOR_strlen)( void* ); 109 extern void* VG_(arm64_linux_REDIR_FOR_index) ( void*, Long ); 110 extern Long VG_(arm64_linux_REDIR_FOR_strcmp)( void*, void* ); 111 #endif 112 113 #if defined(VGP_x86_darwin) 114 extern Addr VG_(x86_darwin_SUBST_FOR_sigreturn); 115 extern SizeT VG_(x86_darwin_REDIR_FOR_strlen)( void* ); 116 extern SizeT VG_(x86_darwin_REDIR_FOR_strcmp)( void*, void* ); 117 extern void* VG_(x86_darwin_REDIR_FOR_strcat)( void*, void * ); 118 extern char* VG_(x86_darwin_REDIR_FOR_strcpy)( char *s1, char *s2 ); 119 extern SizeT VG_(x86_darwin_REDIR_FOR_strlcat)( char *s1, const char *s2, 120 SizeT size ); 121 #endif 122 123 #if defined(VGP_amd64_darwin) 124 extern Addr VG_(amd64_darwin_SUBST_FOR_sigreturn); 125 extern SizeT VG_(amd64_darwin_REDIR_FOR_strlen)( void* ); 126 extern SizeT VG_(amd64_darwin_REDIR_FOR_strcmp)( void*, void* ); 127 extern void* VG_(amd64_darwin_REDIR_FOR_strcat)( void*, void * ); 128 extern char* VG_(amd64_darwin_REDIR_FOR_strcpy)( char *s1, char *s2 ); 129 extern SizeT VG_(amd64_darwin_REDIR_FOR_strlcat)( char *s1, const char *s2, 130 SizeT size ); 131 extern UInt VG_(amd64_darwin_REDIR_FOR_arc4random)( void ); 132 #endif 133 134 #if defined(VGP_s390x_linux) 135 extern Addr VG_(s390x_linux_SUBST_FOR_sigreturn); 136 extern Addr VG_(s390x_linux_SUBST_FOR_rt_sigreturn); 137 #endif 138 139 #if defined(VGP_mips32_linux) 140 extern Addr VG_(mips32_linux_SUBST_FOR_sigreturn); 141 extern Addr VG_(mips32_linux_SUBST_FOR_rt_sigreturn); 142 extern UInt VG_(mips32_linux_REDIR_FOR_strlen)( void* ); 143 #endif 144 145 #if defined(VGP_mips64_linux) 146 extern Addr VG_(mips64_linux_SUBST_FOR_rt_sigreturn); 147 extern UInt VG_(mips64_linux_REDIR_FOR_strlen)( void* ); 148 #endif 149 150 #endif // __PUB_CORE_TRAMPOLINE_H 151 152 /*--------------------------------------------------------------------*/ 153 /*--- end ---*/ 154 /*--------------------------------------------------------------------*/ 155