* X86: build failure
@ 2025-12-16 23:35 Grygorii Strashko
2025-12-16 23:54 ` Andrew Cooper
0 siblings, 1 reply; 6+ messages in thread
From: Grygorii Strashko @ 2025-12-16 23:35 UTC (permalink / raw)
To: xen-devel@lists.xenproject.org
Hi All,
I experience build failure with following Kconfig combination:
CONFIG_DEBUG=n and CONFIG_XEN_IBT=n
with gcc:
gcc --version
gcc (Ubuntu 11.4.0-1ubuntu1~22.04.2) 11.4.0
Copyright (C) 2021 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Is this known issue?
====== log ===============
CC arch/x86/x86_emulate.o
In file included from arch/x86/x86_emulate.c:27:
arch/x86/x86_emulate/x86_emulate.c: In function ‘x86_emulate’:
arch/x86/x86_emulate/x86_emulate.c:70:36: error: writing 1 byte into a region of size 0 [-Werror=stringop-overflow=]
70 | gcc11_wrap(ptr)[0 - PFX_BYTES] = ext < ext_8f08 ? 0xc4 : 0x8f; \
arch/x86/x86_emulate/x86_emulate.c:78:9: note: in expansion of macro ‘copy_VEX’
78 | copy_VEX(ptr, vex); \
| ^~~~~~~~
arch/x86/x86_emulate/x86_emulate.c:8140:13: note: in expansion of macro ‘copy_REX_VEX’
8140 | copy_REX_VEX(opc, rex_prefix, vex);
| ^~~~~~~~~~~~
In file included from arch/x86/x86_emulate/x86_emulate.c:11,
from arch/x86/x86_emulate.c:27:
arch/x86/x86_emulate/private.h:691:17: note: at offset [0, 4095] into destination object of size [0, 9223372036854775807] allocated by ‘map_domain_page’
691 | (stb).ptr = map_domain_page(_mfn(this_cpu(stubs.mfn))) + \
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/x86/x86_emulate/x86_emulate.c:60:21: note: in expansion of macro ‘get_stub’
60 | uint8_t *buf_ = get_stub(stub); \
| ^~~~~~~~
arch/x86/x86_emulate/x86_emulate.c:3354:15: note: in expansion of macro ‘init_prefixes’
3354 | opc = init_prefixes(stub);
| ^~~~~~~~~~~~~
arch/x86/x86_emulate/private.h:691:17: note: at offset [1, 4096] into destination object of size [0, 9223372036854775807] allocated by ‘map_domain_page’
691 | (stb).ptr = map_domain_page(_mfn(this_cpu(stubs.mfn))) + \
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/x86/x86_emulate/x86_emulate.c:94:21: note: in expansion of macro ‘get_stub’
94 | uint8_t *buf_ = get_stub(stub); \
| ^~~~~~~~
arch/x86/x86_emulate/x86_emulate.c:3402:15: note: in expansion of macro ‘init_evex’
3402 | opc = init_evex(stub);
[...]
--
Best regards,
-grygorii
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: X86: build failure 2025-12-16 23:35 X86: build failure Grygorii Strashko @ 2025-12-16 23:54 ` Andrew Cooper 2025-12-17 0:12 ` Grygorii Strashko 2025-12-17 7:47 ` Jan Beulich 0 siblings, 2 replies; 6+ messages in thread From: Andrew Cooper @ 2025-12-16 23:54 UTC (permalink / raw) To: Grygorii Strashko, xen-devel@lists.xenproject.org; +Cc: Andrew Cooper On 16/12/2025 11:35 pm, Grygorii Strashko wrote: > Hi All, > > I experience build failure with following Kconfig combination: > CONFIG_DEBUG=n and CONFIG_XEN_IBT=n > > with gcc: > gcc --version > gcc (Ubuntu 11.4.0-1ubuntu1~22.04.2) 11.4.0 > Copyright (C) 2021 Free Software Foundation, Inc. > This is free software; see the source for copying conditions. There > is NO > warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR > PURPOSE. > > Is this known issue? > > ====== log =============== > CC arch/x86/x86_emulate.o > In file included from arch/x86/x86_emulate.c:27: > arch/x86/x86_emulate/x86_emulate.c: In function ‘x86_emulate’: > arch/x86/x86_emulate/x86_emulate.c:70:36: error: writing 1 byte into a > region of size 0 [-Werror=stringop-overflow=] > 70 | gcc11_wrap(ptr)[0 - PFX_BYTES] = ext < ext_8f08 ? 0xc4 : > 0x8f; \ > arch/x86/x86_emulate/x86_emulate.c:78:9: note: in expansion of macro > ‘copy_VEX’ > 78 | copy_VEX(ptr, vex); \ > | ^~~~~~~~ > arch/x86/x86_emulate/x86_emulate.c:8140:13: note: in expansion of > macro ‘copy_REX_VEX’ > 8140 | copy_REX_VEX(opc, rex_prefix, vex); > | ^~~~~~~~~~~~ > In file included from arch/x86/x86_emulate/x86_emulate.c:11, > from arch/x86/x86_emulate.c:27: > arch/x86/x86_emulate/private.h:691:17: note: at offset [0, 4095] into > destination object of size [0, 9223372036854775807] allocated by > ‘map_domain_page’ > 691 | (stb).ptr = map_domain_page(_mfn(this_cpu(stubs.mfn))) + \ > | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > arch/x86/x86_emulate/x86_emulate.c:60:21: note: in expansion of macro > ‘get_stub’ > 60 | uint8_t *buf_ = get_stub(stub); \ > | ^~~~~~~~ > arch/x86/x86_emulate/x86_emulate.c:3354:15: note: in expansion of > macro ‘init_prefixes’ > 3354 | opc = init_prefixes(stub); > | ^~~~~~~~~~~~~ > arch/x86/x86_emulate/private.h:691:17: note: at offset [1, 4096] into > destination object of size [0, 9223372036854775807] allocated by > ‘map_domain_page’ > 691 | (stb).ptr = map_domain_page(_mfn(this_cpu(stubs.mfn))) + \ > | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > arch/x86/x86_emulate/x86_emulate.c:94:21: note: in expansion of macro > ‘get_stub’ > 94 | uint8_t *buf_ = get_stub(stub); \ > | ^~~~~~~~ > arch/x86/x86_emulate/x86_emulate.c:3402:15: note: in expansion of > macro ‘init_evex’ > 3402 | opc = init_evex(stub); > [...] > Hmm - that looks like more of the GCC 11 bounds bugs, but that's what the gcc11_wrap() visible at the top is supposed to be fixing. Neither of those CONFIG options ought to be relevant. Which Ubuntu is this? Is it something local, or from one of our CI containers? Is this on staging, or local? ~Andrew ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: X86: build failure 2025-12-16 23:54 ` Andrew Cooper @ 2025-12-17 0:12 ` Grygorii Strashko 2025-12-17 7:13 ` Nicola Vetrini 2025-12-17 7:47 ` Jan Beulich 1 sibling, 1 reply; 6+ messages in thread From: Grygorii Strashko @ 2025-12-17 0:12 UTC (permalink / raw) To: Andrew Cooper, xen-devel@lists.xenproject.org Hi Andrew, On 17.12.25 01:54, Andrew Cooper wrote: > On 16/12/2025 11:35 pm, Grygorii Strashko wrote: >> Hi All, >> >> I experience build failure with following Kconfig combination: >> CONFIG_DEBUG=n and CONFIG_XEN_IBT=n >> >> with gcc: >> gcc --version >> gcc (Ubuntu 11.4.0-1ubuntu1~22.04.2) 11.4.0 >> Copyright (C) 2021 Free Software Foundation, Inc. >> This is free software; see the source for copying conditions. There >> is NO >> warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR >> PURPOSE. >> >> Is this known issue? >> >> ====== log =============== >> CC arch/x86/x86_emulate.o >> In file included from arch/x86/x86_emulate.c:27: >> arch/x86/x86_emulate/x86_emulate.c: In function ‘x86_emulate’: >> arch/x86/x86_emulate/x86_emulate.c:70:36: error: writing 1 byte into a >> region of size 0 [-Werror=stringop-overflow=] >> 70 | gcc11_wrap(ptr)[0 - PFX_BYTES] = ext < ext_8f08 ? 0xc4 : >> 0x8f; \ >> arch/x86/x86_emulate/x86_emulate.c:78:9: note: in expansion of macro >> ‘copy_VEX’ >> 78 | copy_VEX(ptr, vex); \ >> | ^~~~~~~~ >> arch/x86/x86_emulate/x86_emulate.c:8140:13: note: in expansion of >> macro ‘copy_REX_VEX’ >> 8140 | copy_REX_VEX(opc, rex_prefix, vex); >> | ^~~~~~~~~~~~ >> In file included from arch/x86/x86_emulate/x86_emulate.c:11, >> from arch/x86/x86_emulate.c:27: >> arch/x86/x86_emulate/private.h:691:17: note: at offset [0, 4095] into >> destination object of size [0, 9223372036854775807] allocated by >> ‘map_domain_page’ >> 691 | (stb).ptr = map_domain_page(_mfn(this_cpu(stubs.mfn))) + \ >> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ >> arch/x86/x86_emulate/x86_emulate.c:60:21: note: in expansion of macro >> ‘get_stub’ >> 60 | uint8_t *buf_ = get_stub(stub); \ >> | ^~~~~~~~ >> arch/x86/x86_emulate/x86_emulate.c:3354:15: note: in expansion of >> macro ‘init_prefixes’ >> 3354 | opc = init_prefixes(stub); >> | ^~~~~~~~~~~~~ >> arch/x86/x86_emulate/private.h:691:17: note: at offset [1, 4096] into >> destination object of size [0, 9223372036854775807] allocated by >> ‘map_domain_page’ >> 691 | (stb).ptr = map_domain_page(_mfn(this_cpu(stubs.mfn))) + \ >> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ >> arch/x86/x86_emulate/x86_emulate.c:94:21: note: in expansion of macro >> ‘get_stub’ >> 94 | uint8_t *buf_ = get_stub(stub); \ >> | ^~~~~~~~ >> arch/x86/x86_emulate/x86_emulate.c:3402:15: note: in expansion of >> macro ‘init_evex’ >> 3402 | opc = init_evex(stub); >> [...] >> > > Hmm - that looks like more of the GCC 11 bounds bugs, but that's what > the gcc11_wrap() visible at the top is supposed to be fixing. > > Neither of those CONFIG options ought to be relevant. > > Which Ubuntu is this? Is it something local, or from one of our CI > containers? Is this on staging, or local? Local. Nothing special - "Ubuntu 22.04.5 LTS" ======== apt show gcc Package: gcc Version: 4:11.2.0-1ubuntu1 Priority: optional Build-Essential: yes Section: devel Source: gcc-defaults (1.193ubuntu1) Origin: Ubuntu Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com> Original-Maintainer: Debian GCC Maintainers <debian-gcc@lists.debian.org> Bugs: https://bugs.launchpad.net/ubuntu/+filebug Installed-Size: 51,2 kB Provides: c-compiler, gcc-x86-64-linux-gnu (= 4:11.2.0-1ubuntu1) Depends: cpp (= 4:11.2.0-1ubuntu1), gcc-11 (>= 11.2.0-1~) Recommends: libc6-dev | libc-dev Suggests: gcc-multilib, make, manpages-dev, autoconf, automake, libtool, flex, bison, gdb, gcc-doc Conflicts: gcc-doc (<< 1:2.95.3) Task: ubuntustudio-video, ubuntustudio-publishing, ubuntu-mate-core, ubuntu-mate-desktop Download-Size: 5 112 B APT-Manual-Installed: yes APT-Sources: http://ua.archive.ubuntu.com/ubuntu jammy/main amd64 Packages Description: GNU C compiler This is the GNU C compiler, a fairly portable optimizing compiler for C. . This is a dependency package providing the default GNU C compiler. -- Best regards, -grygorii ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: X86: build failure 2025-12-17 0:12 ` Grygorii Strashko @ 2025-12-17 7:13 ` Nicola Vetrini 2025-12-17 7:14 ` Nicola Vetrini 0 siblings, 1 reply; 6+ messages in thread From: Nicola Vetrini @ 2025-12-17 7:13 UTC (permalink / raw) To: Grygorii Strashko; +Cc: Andrew Cooper, xen-devel On 2025-12-17 01:12, Grygorii Strashko wrote: > Hi Andrew, > > On 17.12.25 01:54, Andrew Cooper wrote: >> On 16/12/2025 11:35 pm, Grygorii Strashko wrote: >>> Hi All, >>> >>> I experience build failure with following Kconfig combination: >>> CONFIG_DEBUG=n and CONFIG_XEN_IBT=n >>> >>> with gcc: >>> gcc --version >>> gcc (Ubuntu 11.4.0-1ubuntu1~22.04.2) 11.4.0 >>> Copyright (C) 2021 Free Software Foundation, Inc. >>> This is free software; see the source for copying conditions. >>> There >>> is NO >>> warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR >>> PURPOSE. >>> >>> Is this known issue? >>> >>> ====== log =============== >>> CC arch/x86/x86_emulate.o >>> In file included from arch/x86/x86_emulate.c:27: >>> arch/x86/x86_emulate/x86_emulate.c: In function ‘x86_emulate’: >>> arch/x86/x86_emulate/x86_emulate.c:70:36: error: writing 1 byte into >>> a >>> region of size 0 [-Werror=stringop-overflow=] >>> 70 | gcc11_wrap(ptr)[0 - PFX_BYTES] = ext < ext_8f08 ? 0xc4 : >>> 0x8f; \ >>> arch/x86/x86_emulate/x86_emulate.c:78:9: note: in expansion of macro >>> ‘copy_VEX’ >>> 78 | copy_VEX(ptr, vex); \ >>> | ^~~~~~~~ >>> arch/x86/x86_emulate/x86_emulate.c:8140:13: note: in expansion of >>> macro ‘copy_REX_VEX’ >>> 8140 | copy_REX_VEX(opc, rex_prefix, vex); >>> | ^~~~~~~~~~~~ >>> In file included from arch/x86/x86_emulate/x86_emulate.c:11, >>> from arch/x86/x86_emulate.c:27: >>> arch/x86/x86_emulate/private.h:691:17: note: at offset [0, 4095] into >>> destination object of size [0, 9223372036854775807] allocated by >>> ‘map_domain_page’ >>> 691 | (stb).ptr = map_domain_page(_mfn(this_cpu(stubs.mfn))) + >>> \ >>> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ >>> arch/x86/x86_emulate/x86_emulate.c:60:21: note: in expansion of macro >>> ‘get_stub’ >>> 60 | uint8_t *buf_ = get_stub(stub); \ >>> | ^~~~~~~~ >>> arch/x86/x86_emulate/x86_emulate.c:3354:15: note: in expansion of >>> macro ‘init_prefixes’ >>> 3354 | opc = init_prefixes(stub); >>> | ^~~~~~~~~~~~~ >>> arch/x86/x86_emulate/private.h:691:17: note: at offset [1, 4096] into >>> destination object of size [0, 9223372036854775807] allocated by >>> ‘map_domain_page’ >>> 691 | (stb).ptr = map_domain_page(_mfn(this_cpu(stubs.mfn))) + >>> \ >>> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ >>> arch/x86/x86_emulate/x86_emulate.c:94:21: note: in expansion of macro >>> ‘get_stub’ >>> 94 | uint8_t *buf_ = get_stub(stub); \ >>> | ^~~~~~~~ >>> arch/x86/x86_emulate/x86_emulate.c:3402:15: note: in expansion of >>> macro ‘init_evex’ >>> 3402 | opc = init_evex(stub); >>> [...] >>> >> >> Hmm - that looks like more of the GCC 11 bounds bugs, but that's what >> the gcc11_wrap() visible at the top is supposed to be fixing. >> >> Neither of those CONFIG options ought to be relevant. >> >> Which Ubuntu is this? Is it something local, or from one of our CI >> containers? Is this on staging, or local? > > Local. Nothing special - "Ubuntu 22.04.5 LTS" > > ======== apt show gcc > Package: gcc > Version: 4:11.2.0-1ubuntu1 The minimum gcc version is 5.1 on staging, perhaps this is due to that > Priority: optional > Build-Essential: yes > Section: devel > Source: gcc-defaults (1.193ubuntu1) > Origin: Ubuntu > Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com> > Original-Maintainer: Debian GCC Maintainers > <debian-gcc@lists.debian.org> > Bugs: https://bugs.launchpad.net/ubuntu/+filebug > Installed-Size: 51,2 kB > Provides: c-compiler, gcc-x86-64-linux-gnu (= 4:11.2.0-1ubuntu1) > Depends: cpp (= 4:11.2.0-1ubuntu1), gcc-11 (>= 11.2.0-1~) > Recommends: libc6-dev | libc-dev > Suggests: gcc-multilib, make, manpages-dev, autoconf, automake, > libtool, flex, bison, gdb, gcc-doc > Conflicts: gcc-doc (<< 1:2.95.3) > Task: ubuntustudio-video, ubuntustudio-publishing, ubuntu-mate-core, > ubuntu-mate-desktop > Download-Size: 5 112 B > APT-Manual-Installed: yes > APT-Sources: http://ua.archive.ubuntu.com/ubuntu jammy/main amd64 > Packages > Description: GNU C compiler > This is the GNU C compiler, a fairly portable optimizing compiler for > C. > . > This is a dependency package providing the default GNU C compiler. -- Nicola Vetrini, B.Sc. Software Engineer BUGSENG (https://bugseng.com) LinkedIn: https://www.linkedin.com/in/nicola-vetrini-a42471253 ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: X86: build failure 2025-12-17 7:13 ` Nicola Vetrini @ 2025-12-17 7:14 ` Nicola Vetrini 0 siblings, 0 replies; 6+ messages in thread From: Nicola Vetrini @ 2025-12-17 7:14 UTC (permalink / raw) To: Grygorii Strashko; +Cc: Andrew Cooper, xen-devel On 2025-12-17 08:13, Nicola Vetrini wrote: > On 2025-12-17 01:12, Grygorii Strashko wrote: >> Hi Andrew, >> >> On 17.12.25 01:54, Andrew Cooper wrote: >>> On 16/12/2025 11:35 pm, Grygorii Strashko wrote: >>>> Hi All, >>>> >>>> I experience build failure with following Kconfig combination: >>>> CONFIG_DEBUG=n and CONFIG_XEN_IBT=n >>>> >>>> with gcc: >>>> gcc --version >>>> gcc (Ubuntu 11.4.0-1ubuntu1~22.04.2) 11.4.0 >>>> Copyright (C) 2021 Free Software Foundation, Inc. >>>> This is free software; see the source for copying conditions. >>>> There >>>> is NO >>>> warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR >>>> PURPOSE. >>>> >>>> Is this known issue? >>>> >>>> ====== log =============== >>>> CC arch/x86/x86_emulate.o >>>> In file included from arch/x86/x86_emulate.c:27: >>>> arch/x86/x86_emulate/x86_emulate.c: In function ‘x86_emulate’: >>>> arch/x86/x86_emulate/x86_emulate.c:70:36: error: writing 1 byte into >>>> a >>>> region of size 0 [-Werror=stringop-overflow=] >>>> 70 | gcc11_wrap(ptr)[0 - PFX_BYTES] = ext < ext_8f08 ? 0xc4 >>>> : >>>> 0x8f; \ >>>> arch/x86/x86_emulate/x86_emulate.c:78:9: note: in expansion of macro >>>> ‘copy_VEX’ >>>> 78 | copy_VEX(ptr, vex); \ >>>> | ^~~~~~~~ >>>> arch/x86/x86_emulate/x86_emulate.c:8140:13: note: in expansion of >>>> macro ‘copy_REX_VEX’ >>>> 8140 | copy_REX_VEX(opc, rex_prefix, vex); >>>> | ^~~~~~~~~~~~ >>>> In file included from arch/x86/x86_emulate/x86_emulate.c:11, >>>> from arch/x86/x86_emulate.c:27: >>>> arch/x86/x86_emulate/private.h:691:17: note: at offset [0, 4095] >>>> into >>>> destination object of size [0, 9223372036854775807] allocated by >>>> ‘map_domain_page’ >>>> 691 | (stb).ptr = map_domain_page(_mfn(this_cpu(stubs.mfn))) >>>> + \ >>>> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ >>>> arch/x86/x86_emulate/x86_emulate.c:60:21: note: in expansion of >>>> macro >>>> ‘get_stub’ >>>> 60 | uint8_t *buf_ = get_stub(stub); \ >>>> | ^~~~~~~~ >>>> arch/x86/x86_emulate/x86_emulate.c:3354:15: note: in expansion of >>>> macro ‘init_prefixes’ >>>> 3354 | opc = init_prefixes(stub); >>>> | ^~~~~~~~~~~~~ >>>> arch/x86/x86_emulate/private.h:691:17: note: at offset [1, 4096] >>>> into >>>> destination object of size [0, 9223372036854775807] allocated by >>>> ‘map_domain_page’ >>>> 691 | (stb).ptr = map_domain_page(_mfn(this_cpu(stubs.mfn))) >>>> + \ >>>> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ >>>> arch/x86/x86_emulate/x86_emulate.c:94:21: note: in expansion of >>>> macro >>>> ‘get_stub’ >>>> 94 | uint8_t *buf_ = get_stub(stub); \ >>>> | ^~~~~~~~ >>>> arch/x86/x86_emulate/x86_emulate.c:3402:15: note: in expansion of >>>> macro ‘init_evex’ >>>> 3402 | opc = init_evex(stub); >>>> [...] >>>> >>> >>> Hmm - that looks like more of the GCC 11 bounds bugs, but that's what >>> the gcc11_wrap() visible at the top is supposed to be fixing. >>> >>> Neither of those CONFIG options ought to be relevant. >>> >>> Which Ubuntu is this? Is it something local, or from one of our CI >>> containers? Is this on staging, or local? >> >> Local. Nothing special - "Ubuntu 22.04.5 LTS" >> >> ======== apt show gcc >> Package: gcc >> Version: 4:11.2.0-1ubuntu1 > > The minimum gcc version is 5.1 on staging, perhaps this is due to that Ah, nevermind, too early in the morning :) > >> Priority: optional >> Build-Essential: yes >> Section: devel >> Source: gcc-defaults (1.193ubuntu1) >> Origin: Ubuntu >> Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com> >> Original-Maintainer: Debian GCC Maintainers >> <debian-gcc@lists.debian.org> >> Bugs: https://bugs.launchpad.net/ubuntu/+filebug >> Installed-Size: 51,2 kB >> Provides: c-compiler, gcc-x86-64-linux-gnu (= 4:11.2.0-1ubuntu1) >> Depends: cpp (= 4:11.2.0-1ubuntu1), gcc-11 (>= 11.2.0-1~) >> Recommends: libc6-dev | libc-dev >> Suggests: gcc-multilib, make, manpages-dev, autoconf, automake, >> libtool, flex, bison, gdb, gcc-doc >> Conflicts: gcc-doc (<< 1:2.95.3) >> Task: ubuntustudio-video, ubuntustudio-publishing, ubuntu-mate-core, >> ubuntu-mate-desktop >> Download-Size: 5 112 B >> APT-Manual-Installed: yes >> APT-Sources: http://ua.archive.ubuntu.com/ubuntu jammy/main amd64 >> Packages >> Description: GNU C compiler >> This is the GNU C compiler, a fairly portable optimizing compiler for >> C. >> . >> This is a dependency package providing the default GNU C compiler. -- Nicola Vetrini, B.Sc. Software Engineer BUGSENG (https://bugseng.com) LinkedIn: https://www.linkedin.com/in/nicola-vetrini-a42471253 ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: X86: build failure 2025-12-16 23:54 ` Andrew Cooper 2025-12-17 0:12 ` Grygorii Strashko @ 2025-12-17 7:47 ` Jan Beulich 1 sibling, 0 replies; 6+ messages in thread From: Jan Beulich @ 2025-12-17 7:47 UTC (permalink / raw) To: Andrew Cooper, Grygorii Strashko; +Cc: xen-devel@lists.xenproject.org On 17.12.2025 00:54, Andrew Cooper wrote: > On 16/12/2025 11:35 pm, Grygorii Strashko wrote: >> Hi All, >> >> I experience build failure with following Kconfig combination: >> CONFIG_DEBUG=n and CONFIG_XEN_IBT=n >> >> with gcc: >> gcc --version >> gcc (Ubuntu 11.4.0-1ubuntu1~22.04.2) 11.4.0 >> Copyright (C) 2021 Free Software Foundation, Inc. >> This is free software; see the source for copying conditions. There >> is NO >> warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR >> PURPOSE. >> >> Is this known issue? >> >> ====== log =============== >> CC arch/x86/x86_emulate.o >> In file included from arch/x86/x86_emulate.c:27: >> arch/x86/x86_emulate/x86_emulate.c: In function ‘x86_emulate’: >> arch/x86/x86_emulate/x86_emulate.c:70:36: error: writing 1 byte into a >> region of size 0 [-Werror=stringop-overflow=] >> 70 | gcc11_wrap(ptr)[0 - PFX_BYTES] = ext < ext_8f08 ? 0xc4 : >> 0x8f; \ >> arch/x86/x86_emulate/x86_emulate.c:78:9: note: in expansion of macro >> ‘copy_VEX’ >> 78 | copy_VEX(ptr, vex); \ >> | ^~~~~~~~ >> arch/x86/x86_emulate/x86_emulate.c:8140:13: note: in expansion of >> macro ‘copy_REX_VEX’ >> 8140 | copy_REX_VEX(opc, rex_prefix, vex); >> | ^~~~~~~~~~~~ >> In file included from arch/x86/x86_emulate/x86_emulate.c:11, >> from arch/x86/x86_emulate.c:27: >> arch/x86/x86_emulate/private.h:691:17: note: at offset [0, 4095] into >> destination object of size [0, 9223372036854775807] allocated by >> ‘map_domain_page’ >> 691 | (stb).ptr = map_domain_page(_mfn(this_cpu(stubs.mfn))) + \ >> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ >> arch/x86/x86_emulate/x86_emulate.c:60:21: note: in expansion of macro >> ‘get_stub’ >> 60 | uint8_t *buf_ = get_stub(stub); \ >> | ^~~~~~~~ >> arch/x86/x86_emulate/x86_emulate.c:3354:15: note: in expansion of >> macro ‘init_prefixes’ >> 3354 | opc = init_prefixes(stub); >> | ^~~~~~~~~~~~~ >> arch/x86/x86_emulate/private.h:691:17: note: at offset [1, 4096] into >> destination object of size [0, 9223372036854775807] allocated by >> ‘map_domain_page’ >> 691 | (stb).ptr = map_domain_page(_mfn(this_cpu(stubs.mfn))) + \ >> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ >> arch/x86/x86_emulate/x86_emulate.c:94:21: note: in expansion of macro >> ‘get_stub’ >> 94 | uint8_t *buf_ = get_stub(stub); \ >> | ^~~~~~~~ >> arch/x86/x86_emulate/x86_emulate.c:3402:15: note: in expansion of >> macro ‘init_evex’ >> 3402 | opc = init_evex(stub); >> [...] >> > > Hmm - that looks like more of the GCC 11 bounds bugs, but that's what > the gcc11_wrap() visible at the top is supposed to be fixing. > > Neither of those CONFIG options ought to be relevant. CONFIG_DEBUG=n may well matter, due to the different -O<n> settings. CONFIG_XEN_IBT=n otoh is indeed curious. May want experimenting some starting from the pre-processed file. Grygorii, could you generate that in your build env and then make it available somewhere (together with the exact options passed to gcc when you observe the build failure)? Jan ^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2025-12-17 7:47 UTC | newest] Thread overview: 6+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2025-12-16 23:35 X86: build failure Grygorii Strashko 2025-12-16 23:54 ` Andrew Cooper 2025-12-17 0:12 ` Grygorii Strashko 2025-12-17 7:13 ` Nicola Vetrini 2025-12-17 7:14 ` Nicola Vetrini 2025-12-17 7:47 ` Jan Beulich
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.