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) 2000-2012 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 //-------------------------------------------------------------------- 35 // PURPOSE: This module defines a few replacement functions for Linux 36 // vsyscalls, which we can't implement directly. It also contains 37 // stubs for signal returns. Note, all the code within runs on the 38 // simulated CPU. The vsyscall stubs are gotten to by use of the 39 // redirect mechanism. 40 // 41 // Note: generally, putting replacement functions in here is a bad 42 // idea, since any Dwarf frame-unwind info attached to them will not 43 // be seen by the unwinder in gcc's runtime support. This means 44 // unwinding during exception handling by gcc tends to fail if it 45 // encounters one of these replacement functions. A better place to 46 // put them is in one of the .so's preloaded into the client, since 47 // the client's ld.so will know about it and so gcc's unwinder 48 // (somehow) is able to get hold of it. 49 //-------------------------------------------------------------------- 50 51 /* These two delimit our handwritten assembly code, so we can tell 52 tools which track memory that this area should be regarded as 53 readable, at least. Otherwise Memcheck complains we're jumping to 54 invalid addresses. */ 55 56 extern Addr VG_(trampoline_stuff_start); 57 extern Addr VG_(trampoline_stuff_end); 58 59 #if defined(VGP_x86_linux) 60 extern Addr VG_(x86_linux_SUBST_FOR_sigreturn); 61 extern Addr VG_(x86_linux_SUBST_FOR_rt_sigreturn); 62 extern Char* VG_(x86_linux_REDIR_FOR_index) ( const Char*, Int ); 63 extern UInt VG_(x86_linux_REDIR_FOR_strlen)( void* ); 64 #endif 65 66 #if defined(VGP_amd64_linux) 67 extern Addr VG_(amd64_linux_SUBST_FOR_rt_sigreturn); 68 extern Addr VG_(amd64_linux_REDIR_FOR_vgettimeofday); 69 extern Addr VG_(amd64_linux_REDIR_FOR_vtime); 70 extern Addr VG_(amd64_linux_REDIR_FOR_vgetcpu); 71 extern UInt VG_(amd64_linux_REDIR_FOR_strlen)( void* ); 72 #endif 73 74 #if defined(VGP_ppc32_linux) 75 extern Addr VG_(ppc32_linux_SUBST_FOR_sigreturn); 76 extern Addr VG_(ppc32_linux_SUBST_FOR_rt_sigreturn); 77 extern UInt VG_(ppc32_linux_REDIR_FOR_strlen)( void* ); 78 extern UInt VG_(ppc32_linux_REDIR_FOR_strcmp)( void*, void* ); 79 extern void* VG_(ppc32_linux_REDIR_FOR_strchr)( void*, Int ); 80 #endif 81 82 #if defined(VGP_ppc64_linux) 83 extern Addr VG_(ppc64_linux_SUBST_FOR_rt_sigreturn); 84 extern UInt VG_(ppc64_linux_REDIR_FOR_strlen)( void* ); 85 extern void* VG_(ppc64_linux_REDIR_FOR_strchr)( void*, Int ); 86 /* A label (sans dot) marking the ultra-magical return stub via which 87 all redirected and wrapped functions are made to "return" on 88 ppc64-linux. The one insn at this label is never really 89 translated. Instead, m_translate generates IR to restore the 90 thread's LR and R2 registers from a small stack in the ppc64 guest 91 state structure, and then branch to LR. Convoluted? Confusing? 92 You betcha. Could I think of anything simpler? No. */ 93 extern Addr VG_(ppctoc_magic_redirect_return_stub); 94 #endif 95 96 #if defined(VGP_arm_linux) 97 extern Addr VG_(arm_linux_SUBST_FOR_sigreturn); 98 extern Addr VG_(arm_linux_SUBST_FOR_rt_sigreturn); 99 extern UInt VG_(arm_linux_REDIR_FOR_strlen)( void* ); 100 //extern void* VG_(arm_linux_REDIR_FOR_index) ( void*, Int ); 101 extern void* VG_(arm_linux_REDIR_FOR_memcpy)( void*, void*, Int ); 102 #endif 103 104 #if defined(VGP_x86_darwin) 105 extern Addr VG_(x86_darwin_SUBST_FOR_sigreturn); 106 extern SizeT VG_(x86_darwin_REDIR_FOR_strlen)( void* ); 107 extern SizeT VG_(x86_darwin_REDIR_FOR_strcmp)( void*, void* ); 108 extern void* VG_(x86_darwin_REDIR_FOR_strcat)( void*, void * ); 109 extern char* VG_(x86_darwin_REDIR_FOR_strcpy)( char *s1, char *s2 ); 110 extern SizeT VG_(x86_darwin_REDIR_FOR_strlcat)( char *s1, const char *s2, 111 SizeT size ); 112 #endif 113 114 #if defined(VGP_amd64_darwin) 115 extern Addr VG_(amd64_darwin_SUBST_FOR_sigreturn); 116 extern SizeT VG_(amd64_darwin_REDIR_FOR_strlen)( void* ); 117 extern SizeT VG_(amd64_darwin_REDIR_FOR_strcmp)( void*, void* ); 118 extern void* VG_(amd64_darwin_REDIR_FOR_strcat)( void*, void * ); 119 extern char* VG_(amd64_darwin_REDIR_FOR_strcpy)( char *s1, char *s2 ); 120 extern SizeT VG_(amd64_darwin_REDIR_FOR_strlcat)( char *s1, const char *s2, 121 SizeT size ); 122 extern UInt VG_(amd64_darwin_REDIR_FOR_arc4random)( void ); 123 #endif 124 125 #if defined(VGP_s390x_linux) 126 extern Addr VG_(s390x_linux_SUBST_FOR_sigreturn); 127 extern Addr VG_(s390x_linux_SUBST_FOR_rt_sigreturn); 128 #endif 129 130 #if defined(VGP_mips32_linux) 131 extern Addr VG_(mips32_linux_SUBST_FOR_sigreturn); 132 extern Addr VG_(mips32_linux_SUBST_FOR_rt_sigreturn); 133 extern UInt VG_(mips32_linux_REDIR_FOR_strlen)( void* ); 134 #endif 135 136 #endif // __PUB_CORE_TRAMPOLINE_H 137 138 /*--------------------------------------------------------------------*/ 139 /*--- end ---*/ 140 /*--------------------------------------------------------------------*/ 141