njn | a7598f6 | 2005-06-18 03:27:58 +0000 | [diff] [blame] | 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 | |
sewardj | 0f157dd | 2013-10-18 14:27:36 +0000 | [diff] [blame] | 10 | Copyright (C) 2000-2013 Julian Seward |
njn | a7598f6 | 2005-06-18 03:27:58 +0000 | [diff] [blame] | 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 | |
florian | 535fb1b | 2013-09-15 13:54:34 +0000 | [diff] [blame] | 34 | #include "pub_core_basics.h" // VG_ macro |
| 35 | |
njn | a7598f6 | 2005-06-18 03:27:58 +0000 | [diff] [blame] | 36 | //-------------------------------------------------------------------- |
sewardj | b9bce63 | 2005-06-21 01:41:34 +0000 | [diff] [blame] | 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. |
sewardj | a672ea3 | 2006-04-29 18:03:14 +0000 | [diff] [blame] | 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. |
njn | a7598f6 | 2005-06-18 03:27:58 +0000 | [diff] [blame] | 51 | //-------------------------------------------------------------------- |
| 52 | |
sewardj | b9bce63 | 2005-06-21 01:41:34 +0000 | [diff] [blame] | 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. */ |
njn | 7d2a9c4 | 2005-06-19 21:49:28 +0000 | [diff] [blame] | 57 | |
bart | becedea | 2010-07-29 18:12:23 +0000 | [diff] [blame] | 58 | extern Addr VG_(trampoline_stuff_start); |
| 59 | extern Addr VG_(trampoline_stuff_end); |
njn | a7598f6 | 2005-06-18 03:27:58 +0000 | [diff] [blame] | 60 | |
sewardj | b9bce63 | 2005-06-21 01:41:34 +0000 | [diff] [blame] | 61 | #if defined(VGP_x86_linux) |
bart | becedea | 2010-07-29 18:12:23 +0000 | [diff] [blame] | 62 | extern Addr VG_(x86_linux_SUBST_FOR_sigreturn); |
| 63 | extern Addr VG_(x86_linux_SUBST_FOR_rt_sigreturn); |
sewardj | 6a443b2 | 2005-11-20 19:37:54 +0000 | [diff] [blame] | 64 | extern Char* VG_(x86_linux_REDIR_FOR_index) ( const Char*, Int ); |
sewardj | d28cc96 | 2011-03-28 08:22:55 +0000 | [diff] [blame] | 65 | extern UInt VG_(x86_linux_REDIR_FOR_strlen)( void* ); |
sewardj | b9bce63 | 2005-06-21 01:41:34 +0000 | [diff] [blame] | 66 | #endif |
njn | a7598f6 | 2005-06-18 03:27:58 +0000 | [diff] [blame] | 67 | |
sewardj | b9bce63 | 2005-06-21 01:41:34 +0000 | [diff] [blame] | 68 | #if defined(VGP_amd64_linux) |
bart | becedea | 2010-07-29 18:12:23 +0000 | [diff] [blame] | 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); |
tom | d6ae9e6 | 2012-02-09 11:54:16 +0000 | [diff] [blame] | 72 | extern Addr VG_(amd64_linux_REDIR_FOR_vgetcpu); |
sewardj | b57e693 | 2009-08-02 12:21:31 +0000 | [diff] [blame] | 73 | extern UInt VG_(amd64_linux_REDIR_FOR_strlen)( void* ); |
sewardj | b9bce63 | 2005-06-21 01:41:34 +0000 | [diff] [blame] | 74 | #endif |
sewardj | ad50be3 | 2005-08-18 11:54:30 +0000 | [diff] [blame] | 75 | |
| 76 | #if defined(VGP_ppc32_linux) |
bart | becedea | 2010-07-29 18:12:23 +0000 | [diff] [blame] | 77 | extern Addr VG_(ppc32_linux_SUBST_FOR_sigreturn); |
| 78 | extern Addr VG_(ppc32_linux_SUBST_FOR_rt_sigreturn); |
sewardj | 31d8342 | 2005-10-15 02:00:41 +0000 | [diff] [blame] | 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 ); |
sewardj | ad50be3 | 2005-08-18 11:54:30 +0000 | [diff] [blame] | 82 | #endif |
sewardj | f0915fc | 2006-01-05 14:07:04 +0000 | [diff] [blame] | 83 | |
| 84 | #if defined(VGP_ppc64_linux) |
bart | becedea | 2010-07-29 18:12:23 +0000 | [diff] [blame] | 85 | extern Addr VG_(ppc64_linux_SUBST_FOR_rt_sigreturn); |
sewardj | f0915fc | 2006-01-05 14:07:04 +0000 | [diff] [blame] | 86 | extern UInt VG_(ppc64_linux_REDIR_FOR_strlen)( void* ); |
sewardj | 1a85f4f | 2006-01-12 21:15:35 +0000 | [diff] [blame] | 87 | extern void* VG_(ppc64_linux_REDIR_FOR_strchr)( void*, Int ); |
sewardj | 658f05a | 2006-01-17 02:21:09 +0000 | [diff] [blame] | 88 | /* A label (sans dot) marking the ultra-magical return stub via which |
| 89 | all redirected and wrapped functions are made to "return" on |
sewardj | 6e9de46 | 2011-06-28 07:25:29 +0000 | [diff] [blame] | 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. */ |
bart | becedea | 2010-07-29 18:12:23 +0000 | [diff] [blame] | 95 | extern Addr VG_(ppctoc_magic_redirect_return_stub); |
sewardj | f832bb9 | 2006-10-17 01:54:54 +0000 | [diff] [blame] | 96 | #endif |
| 97 | |
sewardj | 59570ff | 2010-01-01 11:59:33 +0000 | [diff] [blame] | 98 | #if defined(VGP_arm_linux) |
sewardj | bc33be6 | 2011-11-20 09:35:51 +0000 | [diff] [blame] | 99 | extern Addr VG_(arm_linux_SUBST_FOR_sigreturn); |
| 100 | extern Addr VG_(arm_linux_SUBST_FOR_rt_sigreturn); |
sewardj | 59570ff | 2010-01-01 11:59:33 +0000 | [diff] [blame] | 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 | |
sewardj | f0c1250 | 2014-01-12 12:54:00 +0000 | [diff] [blame] | 106 | #if defined(VGP_arm64_linux) |
| 107 | extern Addr VG_(arm64_linux_SUBST_FOR_rt_sigreturn); |
sewardj | 7aa6651 | 2014-03-09 09:44:32 +0000 | [diff] [blame^] | 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* ); |
sewardj | f0c1250 | 2014-01-12 12:54:00 +0000 | [diff] [blame] | 111 | #endif |
| 112 | |
njn | ea2d6fd | 2010-07-01 00:20:20 +0000 | [diff] [blame] | 113 | #if defined(VGP_x86_darwin) |
bart | becedea | 2010-07-29 18:12:23 +0000 | [diff] [blame] | 114 | extern Addr VG_(x86_darwin_SUBST_FOR_sigreturn); |
njn | ea2d6fd | 2010-07-01 00:20:20 +0000 | [diff] [blame] | 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) |
bart | becedea | 2010-07-29 18:12:23 +0000 | [diff] [blame] | 124 | extern Addr VG_(amd64_darwin_SUBST_FOR_sigreturn); |
njn | ea2d6fd | 2010-07-01 00:20:20 +0000 | [diff] [blame] | 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 ); |
njn | f76d27a | 2009-05-28 01:53:07 +0000 | [diff] [blame] | 132 | #endif |
| 133 | |
sewardj | b5b8740 | 2011-03-07 16:05:35 +0000 | [diff] [blame] | 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 | |
sewardj | 5db1540 | 2012-06-07 09:13:21 +0000 | [diff] [blame] | 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 | |
petarj | 4df0bfc | 2013-02-27 23:17:33 +0000 | [diff] [blame] | 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 | |
njn | a7598f6 | 2005-06-18 03:27:58 +0000 | [diff] [blame] | 150 | #endif // __PUB_CORE_TRAMPOLINE_H |
| 151 | |
| 152 | /*--------------------------------------------------------------------*/ |
| 153 | /*--- end ---*/ |
| 154 | /*--------------------------------------------------------------------*/ |