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Diffstat (limited to 'coregrind/pub_core_trampoline.h')
| -rw-r--r-- | coregrind/pub_core_trampoline.h | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/coregrind/pub_core_trampoline.h b/coregrind/pub_core_trampoline.h new file mode 100644 index 0000000..630e52b --- /dev/null +++ b/coregrind/pub_core_trampoline.h @@ -0,0 +1,119 @@ + +/*--------------------------------------------------------------------*/ +/*--- The trampoline code page. pub_core_trampoline.h ---*/ +/*--------------------------------------------------------------------*/ + +/* + This file is part of Valgrind, a dynamic binary instrumentation + framework. + + Copyright (C) 2000-2009 Julian Seward + jseward@acm.org + + This program is free software; you can redistribute it and/or + modify it under the terms of the GNU General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + This program is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307, USA. + + The GNU General Public License is contained in the file COPYING. +*/ + +#ifndef __PUB_CORE_TRAMPOLINE_H +#define __PUB_CORE_TRAMPOLINE_H + +//-------------------------------------------------------------------- +// PURPOSE: This module defines a few replacement functions for Linux +// vsyscalls, which we can't implement directly. It also contains +// stubs for signal returns. Note, all the code within runs on the +// simulated CPU. The vsyscall stubs are gotten to by use of the +// redirect mechanism. +// +// Note: generally, putting replacement functions in here is a bad +// idea, since any Dwarf frame-unwind info attached to them will not +// be seen by the unwinder in gcc's runtime support. This means +// unwinding during exception handling by gcc tends to fail if it +// encounters one of these replacement functions. A better place to +// put them is in one of the .so's preloaded into the client, since +// the client's ld.so will know about it and so gcc's unwinder +// (somehow) is able to get hold of it. +//-------------------------------------------------------------------- + +/* These two delimit our handwritten assembly code, so we can tell + tools which track memory that this area should be regarded as + readable, at least. Otherwise Memcheck complains we're jumping to + invalid addresses. */ + +extern void VG_(trampoline_stuff_start); +extern void VG_(trampoline_stuff_end); + +#if defined(VGP_x86_linux) +extern void VG_(x86_linux_SUBST_FOR_sigreturn); +extern void VG_(x86_linux_SUBST_FOR_rt_sigreturn); +extern Char* VG_(x86_linux_REDIR_FOR_index) ( const Char*, Int ); +#endif + +#if defined(VGP_amd64_linux) +extern void VG_(amd64_linux_SUBST_FOR_rt_sigreturn); +extern void VG_(amd64_linux_REDIR_FOR_vgettimeofday); +extern void VG_(amd64_linux_REDIR_FOR_vtime); +#endif + +#if defined(VGP_ppc32_linux) +extern void VG_(ppc32_linux_SUBST_FOR_sigreturn); +extern void VG_(ppc32_linux_SUBST_FOR_rt_sigreturn); +extern UInt VG_(ppc32_linux_REDIR_FOR_strlen)( void* ); +extern UInt VG_(ppc32_linux_REDIR_FOR_strcmp)( void*, void* ); +extern void* VG_(ppc32_linux_REDIR_FOR_strchr)( void*, Int ); +#endif + +#if defined(VGP_ppc64_linux) +extern void VG_(ppc64_linux_SUBST_FOR_rt_sigreturn); +extern UInt VG_(ppc64_linux_REDIR_FOR_strlen)( void* ); +extern void* VG_(ppc64_linux_REDIR_FOR_strchr)( void*, Int ); +/* A label (sans dot) marking the ultra-magical return stub via which + all redirected and wrapped functions are made to "return" on + ppc64-linux/ppc64-aix5/ppc32-aix5. The one insn at this label is + never really translated. Instead, m_translate generates IR to + restore the thread's LR and R2 registers from a small stack in the + ppc64 guest state structure, and then branch to LR. Convoluted? + Confusing? You betcha. Could I think of anything simpler? No. */ +extern void VG_(ppctoc_magic_redirect_return_stub); +#endif + +#if defined(VGP_ppc32_aix5) +/* A label (sans dot) marking the client start point for ppc32_aix5. + This function is entered with r3 holding a pointer to the + AIX5PreloadPage struct set up by m_initimg. It first tries to + __loadx the _core.so and _tool.so preloads mentioned in the struct; + then it cleans up the register state to be more what it really + should be at client startup, and finally it jumps to the client's + real entry point. */ +extern void VG_(ppc32_aix5_do_preloads_then_start_client); + +/* See comment for VG_(ppctoc_magic_redirect_return_stub) above. */ +extern void VG_(ppctoc_magic_redirect_return_stub); +#endif + +#if defined(VGP_ppc64_aix5) +/* See comment for VG_(ppctoc_magic_redirect_return_stub) above. */ +extern void VG_(ppctoc_magic_redirect_return_stub); + +/* See comment for ppc32_aix5 equivalent above. */ +extern void VG_(ppc64_aix5_do_preloads_then_start_client); +#endif + +#endif // __PUB_CORE_TRAMPOLINE_H + +/*--------------------------------------------------------------------*/ +/*--- end ---*/ +/*--------------------------------------------------------------------*/ |