zenithsiz/ftmemsim-valgrind
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gcc10 arm64 build needs __getauxval for linking with libgcc

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Provide a new library libgcc-sup-<platform>.a that contains symbols
needed by libgcc. This needs to be linked after -lgcc to provide
any symbols missing which would normally be provided by glibc.
At the moment this only provides __getauxval on arm64 linux.

https://bugs.kde.org/show_bug.cgi?id=421321
This commit is contained in:
Mark Wielaard 2020-05-12 16:58:36 +02:00
parent a2ef3fcf6a
commit abbc0761fa
3 changed files with 89 additions and 1 deletions
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3
Makefile.tool.am
View File

@ -17,7 +17,8 @@ TOOL_DEPENDENCIES_@VGCONF_PLATFORM_SEC_CAPS@ = \
endif
TOOL_LDADD_COMMON = -lgcc
TOOL_LDADD_COMMON = -lgcc \
$(top_builddir)/coregrind/libgcc-sup-@VGCONF_ARCH_PRI@-@VGCONF_OS@.a
TOOL_LDADD_@VGCONF_PLATFORM_PRI_CAPS@ = \
$(TOOL_DEPENDENCIES_@VGCONF_PLATFORM_PRI_CAPS@) $(TOOL_LDADD_COMMON)
if VGCONF_HAVE_PLATFORM_SEC

26
coregrind/Makefile.am
View File

@ -542,6 +542,32 @@ libcoregrind_@VGCONF_ARCH_SEC@_@VGCONF_OS@_a_DEPENDENCIES = \
libnolto_coregrind-@VGCONF_ARCH_SEC@-@VGCONF_OS@.a
endif
#----------------------------------------------------------------------------
# libgcc-sup-<platform>.a
# Special supplemental library for functions normally supplied by glibc
# used by libgcc.
#----------------------------------------------------------------------------
pkglib_LIBRARIES += libgcc-sup-@VGCONF_ARCH_PRI@-@VGCONF_OS@.a
if VGCONF_HAVE_PLATFORM_SEC
pkglib_LIBRARIES += libgcc-sup-@VGCONF_ARCH_SEC@-@VGCONF_OS@.a
endif
libgcc_sup_@VGCONF_ARCH_PRI@_@VGCONF_OS@_a_SOURCES = \
m_libgcc_sup.c
libgcc_sup_@VGCONF_ARCH_PRI@_@VGCONF_OS@_a_CPPFLAGS = \
$(AM_CPPFLAGS_@VGCONF_PLATFORM_PRI_CAPS@)
libgcc_sup_@VGCONF_ARCH_PRI@_@VGCONF_OS@_a_CFLAGS = \
$(AM_CFLAGS_PSO_@VGCONF_PLATFORM_PRI_CAPS@)
if VGCONF_HAVE_PLATFORM_SEC
libgcc_sup_@VGCONF_ARCH_SEC@_@VGCONF_OS@_a_SOURCES = \
m_libgcc_sup.c
libgcc_sup_@VGCONF_ARCH_SEC@_@VGCONF_OS@_a_CPPFLAGS = \
$(AM_CPPFLAGS_@VGCONF_PLATFORM_SEC_CAPS@)
libgcc_sup_@VGCONF_ARCH_SEC@_@VGCONF_OS@_a_CFLAGS = \
$(AM_CFLAGS_PSO_@VGCONF_PLATFORM_SEC_CAPS@)
endif
#----------------------------------------------------------------------------
# libreplacemalloc_toolpreload-<platform>.a
#----------------------------------------------------------------------------

61
coregrind/m_libgcc_sup.c Normal file
View File

@ -0,0 +1,61 @@
/* -*- mode: C; c-basic-offset: 3; -*- */
/*--------------------------------------------------------------------*/
/*--- Supplemental functions for libgcc normally provided by glibc ---*/
/*--------------------------------------------------------------------*/
/*
This file is part of Valgrind, a dynamic binary instrumentation
framework.
Copyright (C) 2020 Mark Wielaard
mark@klomp.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, see <http://www.gnu.org/licenses/>.
The GNU General Public License is contained in the file COPYING.
*/
#include "config.h"
#include "pub_core_basics.h"
#include "pub_core_clientstate.h"
/*====================================================================*/
/*=== arm64 libgcc support function for init_have_lse_atomics ===*/
/*====================================================================*/
#if defined(VGP_arm64_linux)
struct auxv
{
Word a_type;
union {
void *a_ptr;
Word a_val;
} u;
};
#define AT_NULL 0
unsigned long int __getauxval (unsigned long int type);
unsigned long int __getauxval (unsigned long int type)
{
struct auxv *p;
for (p = (struct auxv *) VG_(client_auxv);
p != NULL && p->a_type != AT_NULL;
p++)
if (p->a_type == type)
return p->u.a_val;
return 0;
}
#endif