Initial import of fatgrind.HEADmaster

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
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+++ 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                                                          ---*/
+/*--------------------------------------------------------------------*/