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) 2000-2010 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 //-------------------------------------------------------------------- 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 #endif 64 65 #if defined(VGP_amd64_linux) 66 extern Addr VG_(amd64_linux_SUBST_FOR_rt_sigreturn); 67 extern Addr VG_(amd64_linux_REDIR_FOR_vgettimeofday); 68 extern Addr VG_(amd64_linux_REDIR_FOR_vtime); 69 extern UInt VG_(amd64_linux_REDIR_FOR_strlen)( void* ); 70 #endif 71 72 #if defined(VGP_ppc32_linux) 73 extern Addr VG_(ppc32_linux_SUBST_FOR_sigreturn); 74 extern Addr VG_(ppc32_linux_SUBST_FOR_rt_sigreturn); 75 extern UInt VG_(ppc32_linux_REDIR_FOR_strlen)( void* ); 76 extern UInt VG_(ppc32_linux_REDIR_FOR_strcmp)( void*, void* ); 77 extern void* VG_(ppc32_linux_REDIR_FOR_strchr)( void*, Int ); 78 #endif 79 80 #if defined(VGP_ppc64_linux) 81 extern Addr VG_(ppc64_linux_SUBST_FOR_rt_sigreturn); 82 extern UInt VG_(ppc64_linux_REDIR_FOR_strlen)( void* ); 83 extern void* VG_(ppc64_linux_REDIR_FOR_strchr)( void*, Int ); 84 /* A label (sans dot) marking the ultra-magical return stub via which 85 all redirected and wrapped functions are made to "return" on 86 ppc64-linux/ppc64-aix5/ppc32-aix5. The one insn at this label is 87 never really translated. Instead, m_translate generates IR to 88 restore the thread's LR and R2 registers from a small stack in the 89 ppc64 guest state structure, and then branch to LR. Convoluted? 90 Confusing? You betcha. Could I think of anything simpler? No. */ 91 extern Addr VG_(ppctoc_magic_redirect_return_stub); 92 #endif 93 94 #if defined(VGP_arm_linux) 95 extern UInt VG_(arm_linux_REDIR_FOR_strlen)( void* ); 96 //extern void* VG_(arm_linux_REDIR_FOR_index) ( void*, Int ); 97 extern void* VG_(arm_linux_REDIR_FOR_memcpy)( void*, void*, Int ); 98 #endif 99 100 #if defined(VGP_ppc32_aix5) 101 /* A label (sans dot) marking the client start point for ppc32_aix5. 102 This function is entered with r3 holding a pointer to the 103 AIX5PreloadPage struct set up by m_initimg. It first tries to 104 __loadx the _core.so and _tool.so preloads mentioned in the struct; 105 then it cleans up the register state to be more what it really 106 should be at client startup, and finally it jumps to the client's 107 real entry point. */ 108 extern Addr VG_(ppc32_aix5_do_preloads_then_start_client); 109 110 /* See comment for VG_(ppctoc_magic_redirect_return_stub) above. */ 111 extern Addr VG_(ppctoc_magic_redirect_return_stub); 112 #endif 113 114 #if defined(VGP_ppc64_aix5) 115 /* See comment for VG_(ppctoc_magic_redirect_return_stub) above. */ 116 extern Addr VG_(ppctoc_magic_redirect_return_stub); 117 118 /* See comment for ppc32_aix5 equivalent above. */ 119 extern Addr VG_(ppc64_aix5_do_preloads_then_start_client); 120 #endif 121 122 #if defined(VGP_x86_darwin) 123 extern Addr VG_(x86_darwin_SUBST_FOR_sigreturn); 124 extern SizeT VG_(x86_darwin_REDIR_FOR_strlen)( void* ); 125 extern SizeT VG_(x86_darwin_REDIR_FOR_strcmp)( void*, void* ); 126 extern void* VG_(x86_darwin_REDIR_FOR_strcat)( void*, void * ); 127 extern char* VG_(x86_darwin_REDIR_FOR_strcpy)( char *s1, char *s2 ); 128 extern SizeT VG_(x86_darwin_REDIR_FOR_strlcat)( char *s1, const char *s2, 129 SizeT size ); 130 #endif 131 132 #if defined(VGP_amd64_darwin) 133 extern Addr VG_(amd64_darwin_SUBST_FOR_sigreturn); 134 extern SizeT VG_(amd64_darwin_REDIR_FOR_strlen)( void* ); 135 extern SizeT VG_(amd64_darwin_REDIR_FOR_strcmp)( void*, void* ); 136 extern void* VG_(amd64_darwin_REDIR_FOR_strcat)( void*, void * ); 137 extern char* VG_(amd64_darwin_REDIR_FOR_strcpy)( char *s1, char *s2 ); 138 extern SizeT VG_(amd64_darwin_REDIR_FOR_strlcat)( char *s1, const char *s2, 139 SizeT size ); 140 extern UInt VG_(amd64_darwin_REDIR_FOR_arc4random)( void ); 141 #endif 142 143 #endif // __PUB_CORE_TRAMPOLINE_H 144 145 /*--------------------------------------------------------------------*/ 146 /*--- end ---*/ 147 /*--------------------------------------------------------------------*/ 148
