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) 2000-2011 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 56extern Addr VG_(trampoline_stuff_start); 57extern Addr VG_(trampoline_stuff_end); 58 59#if defined(VGP_x86_linux) 60extern Addr VG_(x86_linux_SUBST_FOR_sigreturn); 61extern Addr VG_(x86_linux_SUBST_FOR_rt_sigreturn); 62extern Char* VG_(x86_linux_REDIR_FOR_index) ( const Char*, Int ); 63extern UInt VG_(x86_linux_REDIR_FOR_strlen)( void* ); 64#endif 65 66#if defined(VGP_amd64_linux) 67extern Addr VG_(amd64_linux_SUBST_FOR_rt_sigreturn); 68extern Addr VG_(amd64_linux_REDIR_FOR_vgettimeofday); 69extern Addr VG_(amd64_linux_REDIR_FOR_vtime); 70extern UInt VG_(amd64_linux_REDIR_FOR_strlen)( void* ); 71#endif 72 73#if defined(VGP_ppc32_linux) 74extern Addr VG_(ppc32_linux_SUBST_FOR_sigreturn); 75extern Addr VG_(ppc32_linux_SUBST_FOR_rt_sigreturn); 76extern UInt VG_(ppc32_linux_REDIR_FOR_strlen)( void* ); 77extern UInt VG_(ppc32_linux_REDIR_FOR_strcmp)( void*, void* ); 78extern void* VG_(ppc32_linux_REDIR_FOR_strchr)( void*, Int ); 79#endif 80 81#if defined(VGP_ppc64_linux) 82extern Addr VG_(ppc64_linux_SUBST_FOR_rt_sigreturn); 83extern UInt VG_(ppc64_linux_REDIR_FOR_strlen)( void* ); 84extern void* VG_(ppc64_linux_REDIR_FOR_strchr)( void*, Int ); 85/* A label (sans dot) marking the ultra-magical return stub via which 86 all redirected and wrapped functions are made to "return" on 87 ppc64-linux. The one insn at this label is never really 88 translated. Instead, m_translate generates IR to restore the 89 thread's LR and R2 registers from a small stack in the ppc64 guest 90 state structure, and then branch to LR. Convoluted? Confusing? 91 You betcha. Could I think of anything simpler? No. */ 92extern Addr VG_(ppctoc_magic_redirect_return_stub); 93#endif 94 95#if defined(VGP_arm_linux) 96extern UInt VG_(arm_linux_REDIR_FOR_strlen)( void* ); 97//extern void* VG_(arm_linux_REDIR_FOR_index) ( void*, Int ); 98extern void* VG_(arm_linux_REDIR_FOR_memcpy)( void*, void*, Int ); 99#endif 100 101#if defined(VGP_x86_darwin) 102extern Addr VG_(x86_darwin_SUBST_FOR_sigreturn); 103extern SizeT VG_(x86_darwin_REDIR_FOR_strlen)( void* ); 104extern SizeT VG_(x86_darwin_REDIR_FOR_strcmp)( void*, void* ); 105extern void* VG_(x86_darwin_REDIR_FOR_strcat)( void*, void * ); 106extern char* VG_(x86_darwin_REDIR_FOR_strcpy)( char *s1, char *s2 ); 107extern SizeT VG_(x86_darwin_REDIR_FOR_strlcat)( char *s1, const char *s2, 108 SizeT size ); 109#endif 110 111#if defined(VGP_amd64_darwin) 112extern Addr VG_(amd64_darwin_SUBST_FOR_sigreturn); 113extern SizeT VG_(amd64_darwin_REDIR_FOR_strlen)( void* ); 114extern SizeT VG_(amd64_darwin_REDIR_FOR_strcmp)( void*, void* ); 115extern void* VG_(amd64_darwin_REDIR_FOR_strcat)( void*, void * ); 116extern char* VG_(amd64_darwin_REDIR_FOR_strcpy)( char *s1, char *s2 ); 117extern SizeT VG_(amd64_darwin_REDIR_FOR_strlcat)( char *s1, const char *s2, 118 SizeT size ); 119extern UInt VG_(amd64_darwin_REDIR_FOR_arc4random)( void ); 120#endif 121 122#if defined(VGP_s390x_linux) 123extern Addr VG_(s390x_linux_SUBST_FOR_sigreturn); 124extern Addr VG_(s390x_linux_SUBST_FOR_rt_sigreturn); 125#endif 126 127#endif // __PUB_CORE_TRAMPOLINE_H 128 129/*--------------------------------------------------------------------*/ 130/*--- end ---*/ 131/*--------------------------------------------------------------------*/ 132