tcgbios.c:1519:33: error: taking address of packed member of ‘struct ’ may result in an unaligned pointer value [-Werror=address-of-packed-member]

[Marietto2008]

Hello. I was trying to compile the xen tools for enabling GVT for my integrated intel gpu with xen and the compilation stopped like this :

gcc -m32 -march=i686 -DBUILD_ID -fno-strict-aliasing -std=gnu99 -Wall -Wstrict-prototypes -Wdeclaration-after-statement -Wno-unused-but-set-variable -Wno-unused-local-typedefs -O2 -fomit-frame-pointer -D__XEN_INTERFACE_VERSION__=XEN_LATEST_INTERFACE_VERSION -MMD -MF .tcgbios.o.d -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -mno-tls-direct-seg-refs -DNDEBUG -Werror -fno-stack-protector -fno-exceptions -fno-builtin -msoft-float -I/etc/xen/igvtg-xen/tools/firmware/rombios/32bit/tcgbios/../../../../../tools/include -I.. -I../.. -I../../../../libacpi -fno-pic -fno-PIE -c -o tcgbios.o tcgbios.c
tcgbios.c: In function ‘TCGInterruptHandler’:
tcgbios.c:1519:33: error: taking address of packed member of ‘struct ’ may result in an unaligned pointer value [-Werror=address-of-packed-member]
1519 | &regs->u.r32.edx);
| ^~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors

I see that thig bug has been discussed here :

https://bugs.gentoo.org/689082

and resolved here :

https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=c58b86194ce19d54a2f47d4712cb237b1f880ebb

but on gentoo ! basically I don't know if (and how) I can fix this error on ubuntu 20.04. I don't know if I can use the patches suggested in this page also on ubuntu 20.04 or I should open a specific bug on the ubuntu's bug tracker ? let me know. thanks.

[nevilad]

Where did you get the source code, that you compile?

[Marietto2008]

3.3.2 Build Qemu & Xen for XenGT

git clone https://github.com/intel/igvtg-xen

cd igvtg-xen

git checkout xengt-stable-4.10

git clone https://github.com/intel/igvtg-qemu

cd igvtg-qemu

git checkout stable-2.12.0

cd ..

sed -i 's/\(QEMU_UPSTREAM_REVISION ?= \).*/\1origin\/stable-2.10.0/g' Config.mk

sed -i 's/\(QEMU_UPSTREAM_URL ?= \).*/\1file:\/\/localhost\/root\/igvtg-xen\/igvtg-qemu/g' Config.mk

./autogen.sh

./configure --prefix=/usr

make -j8 xen tools

make install-tools

cp xen/xen.gz /boot/xen-gvt.gz

from here : https://github.com/intel/gvt-linux/wiki/GVTg_Setup_Guide#332-build-qemu--xen-for-xengt

[nevilad]

And what is the command that fails? Meanwhile I'm analyzing the patch.

[nevilad]

Is it a patch to gentoo linux? How is it related to this issue?

[Marietto2008]

now I get a different error than before. it happens when I do : make -j8 xen tools

you can find the log below

new-make-xen-tools.txt

Im not sure if the gentoo patch is valid for this situation. I only know that it seems.

[Marietto2008]

I've analyzed the log and it does not seem that an error is produced,right ? but check the log below :

root@ziomario-z390aoruspro:/etc/xen/igvtg-xen# make -j8 xen tools > new-make-xen-tools
In file included from tools/kconfig/zconf.tab.c:2576:
tools/kconfig/confdata.c: In function ‘conf_write’:
tools/kconfig/confdata.c:773:20: warning: ‘.tmpconfig.’ directive writing 11 bytes into a region of size between 1 and 4097 [-Wformat-overflow=]
773 | sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
| ^~~~~~~~~~~~~~~~~
tools/kconfig/confdata.c:773:3: note: ‘sprintf’ output between 13 and 4119 bytes into a destination of size 4097
773 | sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from tools/kconfig/zconf.tab.c:2576:
tools/kconfig/confdata.c: In function ‘conf_write’:
tools/kconfig/confdata.c:773:20: warning: ‘.tmpconfig.’ directive writing 11 bytes into a region of size between 1 and 4097 [-Wformat-overflow=]
773 | sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
| ^~~~~~~~~~~~~~~~~
tools/kconfig/confdata.c:773:3: note: ‘sprintf’ output between 13 and 4119 bytes into a destination of size 4097
773 | sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/string.h:495,
from xc_private.h:24,
from xc_pm.c:22:
In function ‘strncpy’,
inlined from ‘xc_set_cpufreq_gov’ at xc_pm.c:308:5:
/usr/include/x86_64-linux-gnu/bits/string_fortified.h:106:10: error: ‘__builtin_strncpy’ specified bound 16 equals destination size [-Werror=stringop-truncation]
106 | return __builtin___strncpy_chk (__dest, __src, __len, __bos (__dest));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
make[5]: *** [/etc/xen/igvtg-xen/tools/libxc/../../tools/Rules.mk:222: xc_pm.o] Errore 1
make[5]: *** Attesa per i processi non terminati....
make[4]: *** [Makefile:184: build] Errore 2
make[3]: *** [/etc/xen/igvtg-xen/tools/../tools/Rules.mk:246: subdir-install-libxc] Errore 2
make[2]: *** [/etc/xen/igvtg-xen/tools/../tools/Rules.mk:241: subdirs-install] Errore 2
make[1]: *** [Makefile:74: install] Errore 2
make: *** [Makefile:127: install-tools] Errore 2
make: *** Attesa per i processi non terminati....
utils.c: In function ‘vtd_dump_iommu_info’:
utils.c:286:33: error: converting a packed ‘struct IO_APIC_route_entry’ pointer (alignment 1) to a ‘struct IO_APIC_route_remap_entry’ pointer (alignment 8) may result in an unaligned pointer value [-Werror=address-of-packed-member]
286 | remap = (struct IO_APIC_route_remap_entry *) &rte;
| ^~~~~~~~~~~~~~~~~~~~~~~~~
In file included from utils.c:29:
/etc/xen/igvtg-xen/xen/include/asm/io_apic.h:90:17: note: defined here
90 | struct __packed IO_APIC_route_entry {
| ^~~~~~~~~~~~~~~~~~~
In file included from utils.c:27:
vtd.h:31:8: note: defined here
31 | struct IO_APIC_route_remap_entry {
| ^~~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
make[6]: *** [/etc/xen/igvtg-xen/xen/Rules.mk:178: utils.o] Errore 1
make[6]: *** Attesa per i processi non terminati....
make[5]: *** [/etc/xen/igvtg-xen/xen/Rules.mk:166: vtd/built_in.o] Errore 2
make[5]: *** Attesa per i processi non terminati....
make[4]: *** [/etc/xen/igvtg-xen/xen/Rules.mk:166: passthrough/built_in.o] Errore 2
make[3]: *** [/etc/xen/igvtg-xen/xen/Rules.mk:166: /etc/xen/igvtg-xen/xen/drivers/built_in.o] Errore 2
make[3]: *** Attesa per i processi non terminati....
trace.c: In function ‘__trace_hypercall’:
trace.c:829:19: error: taking address of packed member of ‘struct ’ may result in an unaligned pointer value [-Werror=address-of-packed-member]
829 | uint32_t *a = d.args;
| ^
cc1: all warnings being treated as errors
make[4]: *** [/etc/xen/igvtg-xen/xen/Rules.mk:178: trace.o] Errore 1
make[4]: *** Attesa per i processi non terminati....
make[3]: *** [/etc/xen/igvtg-xen/xen/Rules.mk:166: /etc/xen/igvtg-xen/xen/common/built_in.o] Errore 2
make[2]: *** [Makefile:143: /etc/xen/igvtg-xen/xen/xen] Errore 2
make[1]: *** [Makefile:45: install] Errore 2
make: *** [Makefile:123: install-xen] Errore 2

[nevilad]

Move to folder where you ran ./configure and attach configure script to this issue. I think I found how gentoo patch resolved these errors - they added --disable-werror option to their configure and these warnings were not handled as errors.

PS:
why did you create issues in this repository? You are building https://github.com/intel/igvtg-xen and https://github.com/intel/igvtg-qemu, was it not better to create the issues there?

[Marietto2008]

Hello Mario Marietto,

Well, It's been a long time, I no longer use this version.
But to solve this problem I used a patch from => https://bugs.gentoo.org/689082
The 7 comments, here:

Tomáš Mózes 2019-07-04 05:48:34 UTC

Are the gentoo patches from the PR being applied?

This error:
gcc -m32 -march=i686 -DBUILD_ID -fno-strict-aliasing -std=gnu99
-Wall -Wstrict-prototypes -Wdeclaration-after-statement
-Wno-unused-but-set-variable -Wno-unused-local-typedefs -O2
-fomit-frame-pointer
-D__XEN_INTERFACE_VERSION__=XEN_LATEST_INTERFACE_VERSION -MMD -MF
.tcgbios.o.d -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
-mno-tls-direct-seg-refs -DNDEBUG -Werror -fno-stack-protector
-fno-exceptions -fno-builtin -msoft-float
-I/home/ziman/DEVs/XEN/xen-4.11.2/tools/firmware/rombios/32bit/tcgbios/../../../../../tools/include
-I.. -I../.. -I../../../../libacpi -fno-pic -fno-PIE -c -o tcgbios.o
tcgbios.c
tcgbios.c: Dans la fonction « TCGInterruptHandler »:
tcgbios.c:1519:33: erreur: prendre l'adresse du membre compacté de «
struct » peut résulter en une valeur de pointeur non alignée
[-Werror=address-of-packed-member]
1519 | &regs->u.r32.edx);
| ^~~~~~~~~~~~~~~~

Can be temporarily solved by (disabling the gcc 9 check):
diff --git a/tools/firmware/rombios/32bit/tcgbios/Makefile
b/tools/firmware/rombios/32bit/tcgbios/Makefile
index 4dbc713..0138b58 100644

BEGIN PATCH

--- a/tools/firmware/rombios/32bit/tcgbios/Makefile
+++ b/tools/firmware/rombios/32bit/tcgbios/Makefile
@@ -3,7 +3,7 @@ include $(XEN_ROOT)/tools/firmware/Rules.mk

TARGET = tcgbiosext.o

-CFLAGS += $(CFLAGS_xeninclude) -I.. -I../.. -I../../../../libacpi
+CFLAGS += -Wno-address-of-packed-member $(CFLAGS_xeninclude) -I..
-I../.. -I../../../../libacpi
$(call cc-option-add,CFLAGS,CC,-fno-pic)
$(call cc-option-add,CFLAGS,CC,-fno-PIE)

END PATCH

Or find the CFLAGS variable in the file
tools/firmware/rombios/32bit/tcgbios/Makefile, and change,
CFLAGS += $(CFLAGS_xeninclude) -I.. -I../.. -I../../../../libacpi
to
CFLAGS += -Wno-address-of-packed-member $(CFLAGS_xeninclude) -I..
-I../.. -I../../../../libacpi

With this patch, I was able to compile xen without problem. I hope
this will help you.

Best regards.

[Marietto2008]

new error :

D__OBJECT_FILE__="trace.o"' -Wa,--strip-local-absolute -MMD -MF ./.trace.o.d -I/etc/xen/igvtg-xen2/xen/include -I/etc/xen/igvtg-xen2/xen/include/asm-x86/mach-generic -I/etc/xen/igvtg-xen2/xen/include/asm-x86/mach-default -DXEN_IMG_OFFSET=0x200000 '-D__OBJECT_LABEL__=common$trace.o' -msoft-float -fno-stack-protector -fno-exceptions -Wnested-externs -DHAVE_GAS_VMX -DHAVE_GAS_SSE4_2 -DHAVE_GAS_EPT -DHAVE_GAS_RDRAND -DHAVE_GAS_FSGSBASE -DHAVE_GAS_RDSEED -U__OBJECT_LABEL__ -DHAVE_GAS_QUOTED_SYM '-D__OBJECT_LABEL__=common/trace.o' -mno-red-zone -mno-sse -fpic -fno-asynchronous-unwind-tables -DGCC_HAS_VISIBILITY_ATTRIBUTE -c trace.c -o trace.o
trace.c: In function ‘__trace_hypercall’:
trace.c:829:19: error: taking address of packed member of ‘struct ’ may result in an unaligned pointer value [-Werror=address-of-packed-member]
829 | uint32_t *a = d.args;
| ^
cc1: all warnings being treated as errors

[Marietto2008]

Move to folder where you ran ./configure and attach configure script to this issue. I think I found how gentoo patch resolved >these errors - they added --disable-werror option to their configure and these warnings were not handled as errors.

like this ?

root@ziomario-z390aoruspro:/etc/xen/igvtg-xen_# ./configure --disable-werror
checking build system type... x86_64-unknown-linux-gnu
checking host system type... x86_64-unknown-linux-gnu
Will build the following subsystems:
xen
tools
stubdom
docs
configure: creating ./config.status
config.status: creating config/Toplevel.mk
config.status: creating config/Paths.mk
=== configuring in tools (/etc/xen/igvtg-xen_/tools)
configure: running /bin/bash ./configure --disable-option-checking '--prefix=/usr/local' '--disable-werror' --cache-file=/dev/null --srcdir=.
checking build system type... x86_64-unknown-linux-gnu
checking host system type... x86_64-unknown-linux-gnu
checking for gcc... gcc
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables...
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ISO C89... none needed
checking for special C compiler options needed for large files... no
checking for FILE_OFFSET_BITS value needed for large files... no
checking for as86... /usr/bin/as86
checking for ld86... /usr/bin/ld86
checking for bcc... /usr/bin/bcc
checking for lzma_version_number in -llzma... yes
checking for gcc... (cached) gcc
checking whether we are using the GNU C compiler... (cached) yes
checking whether gcc accepts -g... (cached) yes
checking for gcc option to accept ISO C89... (cached) none needed
checking whether make sets $(MAKE)... yes
checking for a BSD-compatible install... /usr/bin/install -c
checking for bison... no
checking for flex... no
checking for perl... /usr/bin/perl
checking for awk... /usr/bin/awk
checking for ocamlc... no
checking for ocaml... no
checking for ocamldep... no
checking for ocamlmktop... no
checking for ocamlmklib... no
checking for ocamldoc... no
checking for ocamlbuild... no
checking for ocamlfind... no
checking for gawk... /usr/bin/awk
checking for checkpolicy... no
checking for bash... /bin/bash
checking for python... /usr/bin/python
checking for python version >= 2.3 ... yes
checking how to run the C preprocessor... gcc -E
checking for grep that handles long lines and -e... /usr/bin/grep
checking for egrep... /usr/bin/grep -E
checking for ANSI C header files... yes
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking for python-config... no
checking Python.h usability... yes
checking Python.h presence... yes
checking for Python.h... yes
checking for PyArg_ParseTuple in -lpython2.7... yes
checking whether Python setup.py brokenly enables -D_FORTIFY_SOURCE... ./configure: line 7454: python-config: command not found
no
checking for xgettext... /usr/bin/xgettext
checking for iasl... /usr/bin/iasl
checking uuid/uuid.h usability... yes
checking uuid/uuid.h presence... yes
checking for uuid/uuid.h... yes
checking for uuid_clear in -luuid... yes
checking uuid.h usability... no
checking uuid.h presence... no
checking for uuid.h... no
checking curses.h usability... yes
checking curses.h presence... yes
checking for curses.h... yes
checking for clear in -lcurses... yes
checking ncurses.h usability... yes
checking ncurses.h presence... yes
checking for ncurses.h... yes
checking for clear in -lncurses... yes
checking for define_key in -ltinfo... yes
checking for pkg-config... /usr/bin/pkg-config
checking pkg-config is at least version 0.9.0... yes
checking for glib... yes
checking for pixman... yes
checking for wget... /usr/bin/wget
checking bzlib.h usability... no
checking bzlib.h presence... no
checking for bzlib.h... no
checking lzma.h usability... yes
checking lzma.h presence... yes
checking for lzma.h... yes
checking for lzma_stream_decoder in -llzma... yes
checking lzo/lzo1x.h usability... no
checking lzo/lzo1x.h presence... no
checking for lzo/lzo1x.h... no
checking ext2fs/ext2fs.h usability... no
checking ext2fs/ext2fs.h presence... no
checking for ext2fs/ext2fs.h... no
checking ext4fs/ext2fs.h usability... no
checking ext4fs/ext2fs.h presence... no
checking for ext4fs/ext2fs.h... no
checking for gcry_md_hash_buffer in -lgcrypt... yes
checking for pthread flag... -pthread
checking libutil.h usability... no
checking libutil.h presence... no
checking for libutil.h... no
checking for openpty et al... -lutil
checking for yajl_alloc in -lyajl... yes
checking for deflateCopy in -lz... yes
checking for libiconv_open in -liconv... no
checking argp.h usability... yes
checking argp.h presence... yes
checking for argp.h... yes
checking for argp_usage in -largp... no
checking yajl/yajl_version.h usability... yes
checking yajl/yajl_version.h presence... yes
checking for yajl/yajl_version.h... yes
checking sys/eventfd.h usability... yes
checking sys/eventfd.h presence... yes
checking for sys/eventfd.h... yes
checking valgrind/memcheck.h usability... no
checking valgrind/memcheck.h presence... no
checking for valgrind/memcheck.h... no
checking utmp.h usability... yes
checking utmp.h presence... yes
checking for utmp.h... yes
checking for LIBNL3... no
configure: WARNING: Disabling support for Remus network buffering and COLO.
Please install libnl3 libraries (including libnl3-route), command line tools and devel
headers - version 3.2.8 or higher
checking for SYSTEMD... no
checking for SYSTEMD... no
configure: creating ./config.status
config.status: creating ../config/Tools.mk
config.status: creating hotplug/FreeBSD/rc.d/xencommons
config.status: creating hotplug/FreeBSD/rc.d/xendriverdomain
config.status: creating hotplug/Linux/init.d/sysconfig.xencommons
config.status: creating hotplug/Linux/init.d/sysconfig.xendomains
config.status: creating hotplug/Linux/init.d/xen-watchdog
config.status: creating hotplug/Linux/init.d/xencommons
config.status: creating hotplug/Linux/init.d/xendomains
config.status: creating hotplug/Linux/init.d/xendriverdomain
config.status: creating hotplug/Linux/launch-xenstore
config.status: creating hotplug/Linux/vif-setup
config.status: creating hotplug/Linux/xen-hotplug-common.sh
config.status: creating hotplug/Linux/xendomains
config.status: creating hotplug/NetBSD/rc.d/xencommons
config.status: creating hotplug/NetBSD/rc.d/xendriverdomain
config.status: creating ocaml/xenstored/oxenstored.conf
config.status: creating config.h
=== configuring in stubdom (/etc/xen/igvtg-xen/stubdom)
configure: running /bin/bash ./configure --disable-option-checking '--prefix=/usr/local' '--disable-werror' --cache-file=/dev/null --srcdir=.
checking build system type... x86_64-unknown-linux-gnu
checking host system type... x86_64-unknown-linux-gnu
xyy
checking for wget... /usr/bin/wget
checking for gcc... gcc
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables...
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ISO C89... none needed
checking whether make sets $(MAKE)... yes
checking for a BSD-compatible install... /usr/bin/install -c
checking for cmake... no
Will build the following stub domains:
pv-grub
xenstore-stubdom
ioemu-stubdom
configure: creating ./config.status
config.status: creating ../config/Stubdom.mk
=== configuring in docs (/etc/xen/igvtg-xen_/docs)
configure: running /bin/bash ./configure --disable-option-checking '--prefix=/usr/local' '--disable-werror' --cache-file=/dev/null --srcdir=.
checking for fig2dev... no
configure: WARNING: fig2dev is not available so some documentation won't be built
checking for pod2man... /usr/bin/pod2man
checking for pod2html... /usr/bin/pod2html
checking for pod2text... /usr/bin/pod2text
checking for pandoc... no
configure: WARNING: pandoc is not available so some documentation won't be built
checking for markdown... no
checking for markdown_py... no
configure: WARNING: markdown is not available so some documentation won't be built
checking for perl... /usr/bin/perl
configure: creating ./config.status
config.status: creating ../config/Docs.mk
config.status: creating man/xl.cfg.pod.5
config.status: creating man/xl.pod.1
root@ziomario-z390aoruspro:/etc/xen/igvtg-xen_# make xen tools
make -C xen install
make[1]: ingresso nella directory «/etc/xen/igvtg-xen_/xen»
make -f Rules.mk install
make[2]: ingresso nella directory «/etc/xen/igvtg-xen/xen»
make -C tools
make[3]: ingresso nella directory «/etc/xen/igvtg-xen_/xen/tools»
make symbols
make[4]: ingresso nella directory «/etc/xen/igvtg-xen_/xen/tools»
make[4]: «symbols» è aggiornato.
make[4]: uscita dalla directory «/etc/xen/igvtg-xen_/xen/tools»
make[3]: uscita dalla directory «/etc/xen/igvtg-xen_/xen/tools»
make -f /etc/xen/igvtg-xen_/xen/Rules.mk include/xen/compile.h
make[3]: ingresso nella directory «/etc/xen/igvtg-xen_/xen»
Xen 4.10.0
make[3]: uscita dalla directory «/etc/xen/igvtg-xen_/xen»
[ -e include/asm ] || ln -sf asm-x86 include/asm
[ -e arch/x86/efi ] && for f in boot.c runtime.c compat.c efi.h;
do ln -nsf ../../../common/efi/$f arch/x86/efi/; done;
true
make -f /etc/xen/igvtg-xen_/xen/Rules.mk -C include
make[3]: ingresso nella directory «/etc/xen/igvtg-xen_/xen/include»
python /etc/xen/igvtg-xen_/xen/tools/gen-cpuid.py -i /etc/xen/igvtg-xen_/xen/include/public/arch-x86/cpufeatureset.h /etc/xen/igvtg-xen_/xen/tools/gen-cpuid.py FORCE -o /etc/xen/igvtg-xen_/xen/include/asm-x86/cpuid-autogen.h.new
if ! cmp -s /etc/xen/igvtg-xen_/xen/include/asm-x86/cpuid-autogen.h.new /etc/xen/igvtg-xen_/xen/include/asm-x86/cpuid-autogen.h; then mv -f /etc/xen/igvtg-xen_/xen/include/asm-x86/cpuid-autogen.h.new /etc/xen/igvtg-xen_/xen/include/asm-x86/cpuid-autogen.h; else rm -f /etc/xen/igvtg-xen_/xen/include/asm-x86/cpuid-autogen.h.new; fi
make[3]: uscita dalla directory «/etc/xen/igvtg-xen_/xen/include»
make -f /etc/xen/igvtg-xen_/xen/Rules.mk -C arch/x86 asm-offsets.s
make[3]: ingresso nella directory «/etc/xen/igvtg-xen_/xen/arch/x86»
make[3]: «asm-offsets.s» è aggiornato.
make[3]: uscita dalla directory «/etc/xen/igvtg-xen_/xen/arch/x86»
make -f /etc/xen/igvtg-xen_/xen/Rules.mk include/asm-x86/asm-offsets.h
make[3]: ingresso nella directory «/etc/xen/igvtg-xen_/xen»
make[3]: «include/asm-x86/asm-offsets.h» è aggiornato.
make[3]: uscita dalla directory «/etc/xen/igvtg-xen_/xen»
make -f /etc/xen/igvtg-xen_/xen/Rules.mk -C arch/x86 /etc/xen/igvtg-xen_/xen/xen
make[3]: ingresso nella directory «/etc/xen/igvtg-xen_/xen/arch/x86»
make -f /etc/xen/igvtg-xen_/xen/Rules.mk -C /etc/xen/igvtg-xen_/xen/arch/x86/boot built_in.o
make[4]: ingresso nella directory «/etc/xen/igvtg-xen_/xen/arch/x86/boot»
sed "s! $PWD/! !" .head.o.d >.head.o.d2.tmp && mv -f .head.o.d2.tmp .head.o.d2
make[4]: «built_in.o» è aggiornato.
make[4]: uscita dalla directory «/etc/xen/igvtg-xen_/xen/arch/x86/boot»
make -f /etc/xen/igvtg-xen_/xen/Rules.mk -C /etc/xen/igvtg-xen_/xen/arch/x86/efi built_in.o
make[4]: ingresso nella directory «/etc/xen/igvtg-xen_/xen/arch/x86/efi»
sed "s! $PWD/! !" .relocs-dummy.o.d >.relocs-dummy.o.d2.tmp && mv -f .relocs-dummy.o.d2.tmp .relocs-dummy.o.d2
sed "s! $PWD/! !" .runtime.o.d >.runtime.o.d2.tmp && mv -f .runtime.o.d2.tmp .runtime.o.d2
sed "s! $PWD/! !" .compat.o.d >.compat.o.d2.tmp && mv -f .compat.o.d2.tmp .compat.o.d2
sed "s! $PWD/! !" .boot.o.d >.boot.o.d2.tmp && mv -f .boot.o.d2.tmp .boot.o.d2
gcc -m64 -DBUILD_ID -fno-strict-aliasing -std=gnu99 -Wall -Wstrict-prototypes -Wdeclaration-after-statement -Wno-unused-but-set-variable -Wno-unused-local-typedefs -O2 -fomit-frame-pointer -nostdinc -fno-builtin -fno-common -Werror -Wredundant-decls -Wno-pointer-arith -pipe -g -D__XEN__ -include /etc/xen/igvtg-xen_/xen/include/xen/config.h '-D__OBJECT_FILE__="boot.o"' -Wa,--strip-local-absolute -MMD -MF ./.boot.o.d -I/etc/xen/igvtg-xen_/xen/include -I/etc/xen/igvtg-xen_/xen/include/asm-x86/mach-generic -I/etc/xen/igvtg-xen_/xen/include/asm-x86/mach-default -DXEN_IMG_OFFSET=0x200000 '-D__OBJECT_LABEL__=arch$x86$efi$boot.o' -msoft-float -fno-stack-protector -fno-exceptions -Wnested-externs -DHAVE_GAS_VMX -DHAVE_GAS_SSE4_2 -DHAVE_GAS_EPT -DHAVE_GAS_RDRAND -DHAVE_GAS_FSGSBASE -DHAVE_GAS_RDSEED -U__OBJECT_LABEL__ -DHAVE_GAS_QUOTED_SYM '-D__OBJECT_LABEL__=arch/x86/efi/boot.o' -mno-red-zone -mno-sse -fpic -fno-asynchronous-unwind-tables -DGCC_HAS_VISIBILITY_ATTRIBUTE -fshort-wchar -DINIT_SECTIONS_ONLY -c boot.c -o boot.o
objdump -h boot.o | sed -n '/[0-9]/{s,00*,0,g;p;}' | while read idx name sz rest; do
case "$name" in
..local) ;;
.text|.text.|.data|.data.*|.bss)
test $sz != 0 || continue;
echo "Error: size of boot.o:$name is 0x$sz" >&2;
exit $(expr $idx + 1);;
esac;
done
objcopy --rename-section .rodata=.init.rodata --rename-section .rodata.str1.1=.init.rodata.str1.1 --rename-section .rodata.str2.1=.init.rodata.str2.1 --rename-section .rodata.str4.1=.init.rodata.str4.1 --rename-section .rodata.cst1=.init.rodata.cst1 --rename-section .rodata.str1.2=.init.rodata.str1.2 --rename-section .rodata.str2.2=.init.rodata.str2.2 --rename-section .rodata.str4.2=.init.rodata.str4.2 --rename-section .rodata.cst2=.init.rodata.cst2 --rename-section .rodata.str1.4=.init.rodata.str1.4 --rename-section .rodata.str2.4=.init.rodata.str2.4 --rename-section .rodata.str4.4=.init.rodata.str4.4 --rename-section .rodata.cst4=.init.rodata.cst4 --rename-section .rodata.str1.8=.init.rodata.str1.8 --rename-section .rodata.str2.8=.init.rodata.str2.8 --rename-section .rodata.str4.8=.init.rodata.str4.8 --rename-section .rodata.cst8=.init.rodata.cst8 --rename-section .rodata.str1.16=.init.rodata.str1.16 --rename-section .rodata.str2.16=.init.rodata.str2.16 --rename-section .rodata.str4.16=.init.rodata.str4.16 --rename-section .rodata.cst16=.init.rodata.cst16 --rename-section .data.rel.local=.init.data.rel.local --rename-section .data.rel.ro.local=.init.data.rel.ro.local boot.o boot.init.o
ld -melf_x86_64 -r -o built_in.o boot.init.o compat.o relocs-dummy.o runtime.o
make[4]: uscita dalla directory «/etc/xen/igvtg-xen_/xen/arch/x86/efi»
make -f /etc/xen/igvtg-xen_/xen/Rules.mk -C /etc/xen/igvtg-xen_/xen/common built_in.o
make[4]: ingresso nella directory «/etc/xen/igvtg-xen_/xen/common»
sed "s! $PWD/! !" .sort.o.d >.sort.o.d2.tmp && mv -f .sort.o.d2.tmp .sort.o.d2
sed "s! $PWD/! !" .cpupool.o.d >.cpupool.o.d2.tmp && mv -f .cpupool.o.d2.tmp .cpupool.o.d2
sed "s! $PWD/! !" .core_parking.o.d >.core_parking.o.d2.tmp && mv -f .core_parking.o.d2.tmp .core_parking.o.d2
sed "s! $PWD/! !" .sched_credit2.o.d >.sched_credit2.o.d2.tmp && mv -f .sched_credit2.o.d2.tmp .sched_credit2.o.d2
sed "s! $PWD/! !" .radix-tree.o.d >.radix-tree.o.d2.tmp && mv -f .radix-tree.o.d2.tmp .radix-tree.o.d2
sed "s! $PWD/! !" .livepatch_elf.o.d >.livepatch_elf.o.d2.tmp && mv -f .livepatch_elf.o.d2.tmp .livepatch_elf.o.d2
sed "s! $PWD/! !" .sched_null.o.d >.sched_null.o.d2.tmp && mv -f .sched_null.o.d2.tmp .sched_null.o.d2
sed "s! $PWD/! !" .bsearch.o.d >.bsearch.o.d2.tmp && mv -f .bsearch.o.d2.tmp .bsearch.o.d2
sed "s! $PWD/! !" .smp.o.d >.smp.o.d2.tmp && mv -f .smp.o.d2.tmp .smp.o.d2
sed "s! $PWD/! !" .notifier.o.d >.notifier.o.d2.tmp && mv -f .notifier.o.d2.tmp .notifier.o.d2
sed "s! $PWD/! !" .guestcopy.o.d >.guestcopy.o.d2.tmp && mv -f .guestcopy.o.d2.tmp .guestcopy.o.d2
sed "s! $PWD/! !" .domctl.o.d >.domctl.o.d2.tmp && mv -f .domctl.o.d2.tmp .domctl.o.d2
sed "s! $PWD/! !" .livepatch.o.d >.livepatch.o.d2.tmp && mv -f .livepatch.o.d2.tmp .livepatch.o.d2
sed "s! $PWD/! !" .trace.o.d >.trace.o.d2.tmp && mv -f .trace.o.d2.tmp .trace.o.d2
sed "s! $PWD/! !" .cpu.o.d >.cpu.o.d2.tmp && mv -f .cpu.o.d2.tmp .cpu.o.d2
sed "s! $PWD/! !" .timer.o.d >.timer.o.d2.tmp && mv -f .timer.o.d2.tmp .timer.o.d2
sed "s! $PWD/! !" .softirq.o.d >.softirq.o.d2.tmp && mv -f .softirq.o.d2.tmp .softirq.o.d2
sed "s! $PWD/! !" .event_2l.o.d >.event_2l.o.d2.tmp && mv -f .event_2l.o.d2.tmp .event_2l.o.d2
sed "s! $PWD/! !" .string.o.d >.string.o.d2.tmp && mv -f .string.o.d2.tmp .string.o.d2
sed "s! $PWD/! !" .keyhandler.o.d >.keyhandler.o.d2.tmp && mv -f .keyhandler.o.d2.tmp .keyhandler.o.d2
sed "s! $PWD/! !" .event_channel.o.d >.event_channel.o.d2.tmp && mv -f .event_channel.o.d2.tmp .event_channel.o.d2
sed "s! $PWD/! !" .irq.o.d >.irq.o.d2.tmp && mv -f .irq.o.d2.tmp .irq.o.d2
sed "s! $PWD/! !" .pdx.o.d >.pdx.o.d2.tmp && mv -f .pdx.o.d2.tmp .pdx.o.d2
sed "s! $PWD/! !" .rwlock.o.d >.rwlock.o.d2.tmp && mv -f .rwlock.o.d2.tmp .rwlock.o.d2
sed "s! $PWD/! !" .sched_arinc653.o.d >.sched_arinc653.o.d2.tmp && mv -f .sched_arinc653.o.d2.tmp .sched_arinc653.o.d2
sed "s! $PWD/! !" .kimage.o.d >.kimage.o.d2.tmp && mv -f .kimage.o.d2.tmp .kimage.o.d2
sed "s! $PWD/! !" .preempt.o.d >.preempt.o.d2.tmp && mv -f .preempt.o.d2.tmp .preempt.o.d2
sed "s! $PWD/! !" .grant_table.o.d >.grant_table.o.d2.tmp && mv -f .grant_table.o.d2.tmp .grant_table.o.d2
sed "s! $PWD/! !" .symbols.o.d >.symbols.o.d2.tmp && mv -f .symbols.o.d2.tmp .symbols.o.d2
sed "s! $PWD/! !" .monitor.o.d >.monitor.o.d2.tmp && mv -f .monitor.o.d2.tmp .monitor.o.d2
sed "s! $PWD/! !" .time.o.d >.time.o.d2.tmp && mv -f .time.o.d2.tmp .time.o.d2
sed "s! $PWD/! !" .rbtree.o.d >.rbtree.o.d2.tmp && mv -f .rbtree.o.d2.tmp .rbtree.o.d2
sed "s! $PWD/! !" .rangeset.o.d >.rangeset.o.d2.tmp && mv -f .rangeset.o.d2.tmp .rangeset.o.d2
sed "s! $PWD/! !" .lzo.o.d >.lzo.o.d2.tmp && mv -f .lzo.o.d2.tmp .lzo.o.d2
sed "s! $PWD/! !" .sysctl.o.d >.sysctl.o.d2.tmp && mv -f .sysctl.o.d2.tmp .sysctl.o.d2
sed "s! $PWD/! !" .schedule.o.d >.schedule.o.d2.tmp && mv -f .schedule.o.d2.tmp .schedule.o.d2
sed "s! $PWD/! !" .spinlock.o.d >.spinlock.o.d2.tmp && mv -f .spinlock.o.d2.tmp .spinlock.o.d2
sed "s! $PWD/! !" .memory.o.d >.memory.o.d2.tmp && mv -f .memory.o.d2.tmp .memory.o.d2
sed "s! $PWD/! !" .sched_rt.o.d >.sched_rt.o.d2.tmp && mv -f .sched_rt.o.d2.tmp .sched_rt.o.d2
sed "s! $PWD/! !" .multicall.o.d >.multicall.o.d2.tmp && mv -f .multicall.o.d2.tmp .multicall.o.d2
sed "s! $PWD/! !" .rcupdate.o.d >.rcupdate.o.d2.tmp && mv -f .rcupdate.o.d2.tmp .rcupdate.o.d2
sed "s! $PWD/! !" .random.o.d >.random.o.d2.tmp && mv -f .random.o.d2.tmp .random.o.d2
sed "s! $PWD/! !" .sched_credit.o.d >.sched_credit.o.d2.tmp && mv -f .sched_credit.o.d2.tmp .sched_credit.o.d2
sed "s! $PWD/! !" .shutdown.o.d >.shutdown.o.d2.tmp && mv -f .shutdown.o.d2.tmp .shutdown.o.d2
sed "s! $PWD/! !" .event_fifo.o.d >.event_fifo.o.d2.tmp && mv -f .event_fifo.o.d2.tmp .event_fifo.o.d2
sed "s! $PWD/! !" .bitmap.o.d >.bitmap.o.d2.tmp && mv -f .bitmap.o.d2.tmp .bitmap.o.d2
sed "s! $PWD/! !" .lib.o.d >.lib.o.d2.tmp && mv -f .lib.o.d2.tmp .lib.o.d2
sed "s! $PWD/! !" .kexec.o.d >.kexec.o.d2.tmp && mv -f .kexec.o.d2.tmp .kexec.o.d2
sed "s! $PWD/! !" .mem_access.o.d >.mem_access.o.d2.tmp && mv -f .mem_access.o.d2.tmp .mem_access.o.d2
sed "s! $PWD/! !" .tasklet.o.d >.tasklet.o.d2.tmp && mv -f .tasklet.o.d2.tmp .tasklet.o.d2
sed "s! $PWD/! !" .page_alloc.o.d >.page_alloc.o.d2.tmp && mv -f .page_alloc.o.d2.tmp .page_alloc.o.d2
sed "s! $PWD/! !" .stop_machine.o.d >.stop_machine.o.d2.tmp && mv -f .stop_machine.o.d2.tmp .stop_machine.o.d2
sed "s! $PWD/! !" .kernel.o.d >.kernel.o.d2.tmp && mv -f .kernel.o.d2.tmp .kernel.o.d2
sed "s! $PWD/! !" .domain.o.d >.domain.o.d2.tmp && mv -f .domain.o.d2.tmp .domain.o.d2
gcc -m64 -DBUILD_ID -fno-strict-aliasing -std=gnu99 -Wall -Wstrict-prototypes -Wdeclaration-after-statement -Wno-unused-but-set-variable -Wno-unused-local-typedefs -O2 -fomit-frame-pointer -nostdinc -fno-builtin -fno-common -Werror -Wredundant-decls -Wno-pointer-arith -pipe -g -D__XEN__ -include /etc/xen/igvtg-xen_/xen/include/xen/config.h '-D__OBJECT_FILE__="trace.o"' -Wa,--strip-local-absolute -MMD -MF ./.trace.o.d -I/etc/xen/igvtg-xen_/xen/include -I/etc/xen/igvtg-xen_/xen/include/asm-x86/mach-generic -I/etc/xen/igvtg-xen_/xen/include/asm-x86/mach-default -DXEN_IMG_OFFSET=0x200000 '-D__OBJECT_LABEL__=common$trace.o' -msoft-float -fno-stack-protector -fno-exceptions -Wnested-externs -DHAVE_GAS_VMX -DHAVE_GAS_SSE4_2 -DHAVE_GAS_EPT -DHAVE_GAS_RDRAND -DHAVE_GAS_FSGSBASE -DHAVE_GAS_RDSEED -U__OBJECT_LABEL__ -DHAVE_GAS_QUOTED_SYM '-D__OBJECT_LABEL__=common/trace.o' -mno-red-zone -mno-sse -fpic -fno-asynchronous-unwind-tables -DGCC_HAS_VISIBILITY_ATTRIBUTE -c trace.c -o trace.o
trace.c: In function ‘trace_hypercall’:
trace.c:829:19: error: taking address of packed member of ‘struct ’ may result in an unaligned pointer value [-Werror=address-of-packed-member]
829 | uint32_t *a = d.args;
| ^
cc1: all warnings being treated as errors
make[4]: *** [/etc/xen/igvtg-xen/xen/Rules.mk:178: trace.o] Errore 1
make[4]: uscita dalla directory «/etc/xen/igvtg-xen/xen/common»
make[3]: *** [/etc/xen/igvtg-xen_/xen/Rules.mk:166: /etc/xen/igvtg-xen_/xen/common/built_in.o] Errore 2
make[3]: uscita dalla directory «/etc/xen/igvtg-xen_/xen/arch/x86»
make[2]: *** [Makefile:143: /etc/xen/igvtg-xen_/xen/xen] Errore 2
make[2]: uscita dalla directory «/etc/xen/igvtg-xen_/xen»
make[1]: *** [Makefile:45: install] Errore 2
make[1]: uscita dalla directory «/etc/xen/igvtg-xen_/xen»
make: *** [Makefile:123: install-xen] Errore 2

[Marietto2008]

PS: why did you create issues in this repository? You are building https://github.com/intel/igvtg-xen and https://github.com/intel
/igvtg-qemu, was it not better to create the issues there?

I don't think that I will create new isses on the repositories anymore. No one replies there. I get more replies asking on the specific distros bugs reporting

[Marietto2008]

do u want to give a look here :

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84919

this is a new bug that I've got following a different tutorial.

[Marietto2008]

martin says :

The fix was applied to GCC 10 but not to GCC 9 or 8. It will not be backported there. It can be suppressed by introducing a named temporary copy of the pointer and using it as one other other argument to the function.

void f (char *p)
{
char *q = p;
sprintf (p, "%p", q);
}

so,I have added that code to this :

#undef _GNU_SOURCE
#include <string.h>
#include <stdio.h>
#include <linux/string.h>

char *str_error_r(int errnum, char *buf, size_t buflen)
{
int err = strerror_r(errnum, buf, buflen);
if (err)
snprintf(buf, buflen, "INTERNAL ERROR: strerror_r(%d, %p, %zd)=%d", errnum, buf, buflen, err);
return buf;
}

and the result is this :

#undef _GNU_SOURCE
#include <string.h>
#include <stdio.h>
#include <linux/string.h>

char *str_error_r(int errnum, char *buf, size_t buflen)
{
int err = strerror_r(errnum, buf, buflen);
if (err)
snprintf(buf, buflen, "INTERNAL ERROR: strerror_r(%d, %p, %zd)=%d", errnum, buf, buflen, err);
return buf;
}

void f (char *p)
{
char *q = p;
sprintf (p, "%p", q);
}

did I understand correctly ?

[Marietto2008]

even with this new tutorial,I get the same error :

gcc -m64 -DBUILD_ID -fno-strict-aliasing -std=gnu99 -Wall -Wstrict-prototypes -Wdeclaration-after-statement -Wno-unused-but-set-variable -Wno-unused-local-typedefs -O2 -fomit-frame-pointer -nostdinc -fno-builtin -fno-common -Werror -Wredundant-decls -Wno-pointer-arith -pipe -g -D__XEN__ -include /etc/xen/igvtg-xen/xen/include/xen/config.h '-D__OBJECT_FILE__="trace.o"' -Wa,--strip-local-absolute -MMD -MF ./.trace.o.d -I/etc/xen/igvtg-xen/xen/include -I/etc/xen/igvtg-xen/xen/include/asm-x86/mach-generic -I/etc/xen/igvtg-xen/xen/include/asm-x86/mach-default -DXEN_IMG_OFFSET=0x200000 '-D__OBJECT_LABEL__=common$trace.o' -msoft-float -fno-stack-protector -fno-exceptions -Wnested-externs -DHAVE_GAS_VMX -DHAVE_GAS_SSE4_2 -DHAVE_GAS_EPT -DHAVE_GAS_RDRAND -DHAVE_GAS_FSGSBASE -DHAVE_GAS_RDSEED -U__OBJECT_LABEL__ -DHAVE_GAS_QUOTED_SYM '-D__OBJECT_LABEL__=common/trace.o' -mno-red-zone -mno-sse -fpic -fno-asynchronous-unwind-tables -DGCC_HAS_VISIBILITY_ATTRIBUTE -c trace.c -o trace.o
trace.c: In function ‘__trace_hypercall’:
trace.c:829:19: error: taking address of packed member of ‘struct ’ may result in an unaligned pointer value [-Werror=address-of-packed-member]
829 | uint32_t *a = d.args;
| ^
cc1: all warnings being treated as errors