* [Bug target/95671] Fails to build kernel 5.7 with -march=bdver{2,3,4} workaround -mno-tbm
2020-06-14 11:17 [Bug c/95671] New: Fails to build kernel 5.7 with -march=bdver{2,3,4} workaround -mno-tbm ungift-ed at ya dot ru
@ 2020-06-15 6:49 ` marxin at gcc dot gnu.org
2020-06-15 6:56 ` rguenth at gcc dot gnu.org
` (12 subsequent siblings)
13 siblings, 0 replies; 15+ messages in thread
From: marxin at gcc dot gnu.org @ 2020-06-15 6:49 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95671
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2020-06-15
CC| |marxin at gcc dot gnu.org
Ever confirmed|0 |1
Status|UNCONFIRMED |WAITING
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Can you please attach a pre-processed file for an object that fails with
objtool?
^ permalink raw reply [flat|nested] 15+ messages in thread
* [Bug target/95671] Fails to build kernel 5.7 with -march=bdver{2,3,4} workaround -mno-tbm
2020-06-14 11:17 [Bug c/95671] New: Fails to build kernel 5.7 with -march=bdver{2,3,4} workaround -mno-tbm ungift-ed at ya dot ru
2020-06-15 6:49 ` [Bug target/95671] " marxin at gcc dot gnu.org
@ 2020-06-15 6:56 ` rguenth at gcc dot gnu.org
2020-06-15 11:19 ` ungift-ed at ya dot ru
` (11 subsequent siblings)
13 siblings, 0 replies; 15+ messages in thread
From: rguenth at gcc dot gnu.org @ 2020-06-15 6:56 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95671
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |x86_64-*-* i?86-*-*
Version|unknown |10.1.0
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Assuming GCC 10.1 - you didn't specify.
^ permalink raw reply [flat|nested] 15+ messages in thread
* [Bug target/95671] Fails to build kernel 5.7 with -march=bdver{2,3,4} workaround -mno-tbm
2020-06-14 11:17 [Bug c/95671] New: Fails to build kernel 5.7 with -march=bdver{2,3,4} workaround -mno-tbm ungift-ed at ya dot ru
2020-06-15 6:49 ` [Bug target/95671] " marxin at gcc dot gnu.org
2020-06-15 6:56 ` rguenth at gcc dot gnu.org
@ 2020-06-15 11:19 ` ungift-ed at ya dot ru
2020-06-15 11:23 ` ungift-ed at ya dot ru
` (10 subsequent siblings)
13 siblings, 0 replies; 15+ messages in thread
From: ungift-ed at ya dot ru @ 2020-06-15 11:19 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95671
--- Comment #3 from Maxim Britov <ungift-ed at ya dot ru> ---
(In reply to Richard Biener from comment #2)
> Assuming GCC 10.1 - you didn't specify.
In my env I can reproduce it on 8.3.0 / 9.2.0 / 9.3.0/ 10.1.0
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-pc-linux-gnu/8.3.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with:
/var/tmp/portage/sys-devel/gcc-8.3.0-r1/work/gcc-8.3.0/configure
--host=x86_64-pc-linux-gnu --build=x86_64-pc-linux-gnu --prefix=/usr
--bindir=/usr/x86_64-pc-linux-gnu/gcc-bin/8.3.0
--includedir=/usr/lib/gcc/x86_64-pc-linux-gnu/8.3.0/include
--datadir=/usr/share/gcc-data/x86_64-pc-linux-gnu/8.3.0
--mandir=/usr/share/gcc-data/x86_64-pc-linux-gnu/8.3.0/man
--infodir=/usr/share/gcc-data/x86_64-pc-linux-gnu/8.3.0/info
--with-gxx-include-dir=/usr/lib/gcc/x86_64-pc-linux-gnu/8.3.0/include/g++-v8
--with-python-dir=/share/gcc-data/x86_64-pc-linux-gnu/8.3.0/python
--enable-languages=c,c++,fortran --enable-obsolete --enable-secureplt
--disable-werror --with-system-zlib --disable-nls --enable-checking=release
--with-bugurl=https://bugs.gentoo.org/ --with-pkgversion='Gentoo Hardened
8.3.0-r1 p1.1' --enable-esp --enable-libstdcxx-time --disable-libstdcxx-pch
--enable-shared --enable-threads=posix --enable-__cxa_atexit
--enable-clocale=gnu --disable-multilib --with-multilib-list=m64
--disable-altivec --disable-fixed-point --enable-targets=all --enable-libgomp
--disable-libmudflap --disable-libssp --disable-libmpx --disable-systemtap
--enable-vtable-verify --enable-lto --without-isl --enable-default-pie
--enable-default-ssp
Thread model: posix
gcc version 8.3.0 (Gentoo Hardened 8.3.0-r1 p1.1)
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-pc-linux-gnu/9.3.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /var/tmp/portage/sys-devel/gcc-9.3.0/work/gcc-9.3.0/configure
--host=x86_64-pc-linux-gnu --build=x86_64-pc-linux-gnu --prefix=/usr
--bindir=/usr/x86_64-pc-linux-gnu/gcc-bin/9.3.0
--includedir=/usr/lib/gcc/x86_64-pc-linux-gnu/9.3.0/include
--datadir=/usr/share/gcc-data/x86_64-pc-linux-gnu/9.3.0
--mandir=/usr/share/gcc-data/x86_64-pc-linux-gnu/9.3.0/man
--infodir=/usr/share/gcc-data/x86_64-pc-linux-gnu/9.3.0/info
--with-gxx-include-dir=/usr/lib/gcc/x86_64-pc-linux-gnu/9.3.0/include/g++-v9
--with-python-dir=/share/gcc-data/x86_64-pc-linux-gnu/9.3.0/python
--enable-languages=c,c++ --enable-obsolete --enable-secureplt --disable-werror
--with-system-zlib --disable-nls --enable-checking=release
--with-bugurl=https://bugs.gentoo.org/ --with-pkgversion='Gentoo Hardened 9.3.0
p2' --enable-esp --enable-libstdcxx-time --with-build-config=bootstrap-lto
--disable-libstdcxx-pch --enable-shared --enable-threads=posix
--enable-__cxa_atexit --enable-clocale=gnu --disable-multilib
--with-multilib-list=m64 --disable-altivec --disable-fixed-point
--enable-targets=all --enable-libgomp --disable-libmudflap --disable-libssp
--disable-libada --disable-systemtap --enable-vtable-verify
--disable-libquadmath --enable-lto --without-isl --enable-default-pie
--enable-default-ssp
Thread model: posix
gcc version 9.3.0 (Gentoo Hardened 9.3.0 p2)
built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-pc-linux-gnu/10.1.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with:
/var/tmp/portage/sys-devel/gcc-10.1.0-r1/work/gcc-10.1.0/configure
--host=x86_64-pc-linux-gnu --build=x86_64-pc-linux-gnu --prefix=/usr
--bindir=/usr/x86_64-pc-linux-gnu/gcc-bin/10.1.0
--includedir=/usr/lib/gcc/x86_64-pc-linux-gnu/10.1.0/include
--datadir=/usr/share/gcc-data/x86_64-pc-linux-gnu/10.1.0
--mandir=/usr/share/gcc-data/x86_64-pc-linux-gnu/10.1.0/man
--infodir=/usr/share/gcc-data/x86_64-pc-linux-gnu/10.1.0/info
--with-gxx-include-dir=/usr/lib/gcc/x86_64-pc-linux-gnu/10.1.0/include/g++-v10
--with-python-dir=/share/gcc-data/x86_64-pc-linux-gnu/10.1.0/python
--enable-languages=c,c++ --enable-obsolete --enable-secureplt --disable-werror
--with-system-zlib --disable-nls --enable-checking=release
--with-bugurl=https://bugs.gentoo.org/ --with-pkgversion='Gentoo 10.1.0-r1 p2'
--disable-esp --enable-libstdcxx-time --with-build-config=bootstrap-lto
--enable-shared --enable-threads=posix --enable-__cxa_atexit
--enable-clocale=gnu --disable-multilib --with-multilib-list=m64
--disable-fixed-point --enable-targets=all --enable-libgomp
--disable-libmudflap --disable-libssp --disable-libada --disable-systemtap
--enable-vtable-verify --with-zstd --disable-libquadmath --enable-lto
--with-isl --disable-isl-version-check --enable-default-pie
--enable-default-ssp
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 10.1.0 (Gentoo 10.1.0-r1 p2)
^ permalink raw reply [flat|nested] 15+ messages in thread
* [Bug target/95671] Fails to build kernel 5.7 with -march=bdver{2,3,4} workaround -mno-tbm
2020-06-14 11:17 [Bug c/95671] New: Fails to build kernel 5.7 with -march=bdver{2,3,4} workaround -mno-tbm ungift-ed at ya dot ru
` (2 preceding siblings ...)
2020-06-15 11:19 ` ungift-ed at ya dot ru
@ 2020-06-15 11:23 ` ungift-ed at ya dot ru
2020-06-15 11:24 ` ungift-ed at ya dot ru
` (9 subsequent siblings)
13 siblings, 0 replies; 15+ messages in thread
From: ungift-ed at ya dot ru @ 2020-06-15 11:23 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95671
--- Comment #4 from Maxim Britov <ungift-ed at ya dot ru> ---
(In reply to Martin Liška from comment #1)
> Can you please attach a pre-processed file for an object that fails with
> objtool?
Heh... I'm afraid I need some howto for this... :(
But I made some minimal reproducible .config for kernel 5.7
$ tar xf linux-5.7.tar.xz
$ cd linux-5.7
$ curl
https://raw.githubusercontent.com/graysky2/kernel_gcc_patch/master/enable_additional_cpu_optimizations_for_gcc_v9.1%2B_kernel_v5.7%2B.patch
| patch -p1
$ copy .config10 .config
$ make oldconfig
$ make
I will attach my .config10
For me it fails:
CC arch/x86/entry/vdso/vma.o
LDS arch/x86/entry/vdso/vdso.lds
AS arch/x86/entry/vdso/vdso-note.o
CC arch/x86/entry/vdso/vclock_gettime.o
CC arch/x86/entry/vdso/vgetcpu.o
VDSO arch/x86/entry/vdso/vdso64.so.dbg
OBJCOPY arch/x86/entry/vdso/vdso64.so
HOSTCC arch/x86/entry/vdso/vdso2c
VDSO2C arch/x86/entry/vdso/vdso-image-64.c
CC arch/x86/entry/vdso/vdso-image-64.o
AR arch/x86/entry/vdso/built-in.a
CC arch/x86/entry/vsyscall/vsyscall_64.o
arch/x86/entry/vsyscall/vsyscall_64.o: warning: objtool:
emulate_vsyscall()+0x60: can't find jump dest instruction at .text+0x10a
make[3]: *** [scripts/Makefile.build:267:
arch/x86/entry/vsyscall/vsyscall_64.o] Error 255
make[3]: *** Deleting file 'arch/x86/entry/vsyscall/vsyscall_64.o'
make[2]: *** [scripts/Makefile.build:488: arch/x86/entry/vsyscall] Error 2
make[1]: *** [scripts/Makefile.build:488: arch/x86/entry] Error 2
make: *** [Makefile:1729: arch/x86] Error 2
^ permalink raw reply [flat|nested] 15+ messages in thread
* [Bug target/95671] Fails to build kernel 5.7 with -march=bdver{2,3,4} workaround -mno-tbm
2020-06-14 11:17 [Bug c/95671] New: Fails to build kernel 5.7 with -march=bdver{2,3,4} workaround -mno-tbm ungift-ed at ya dot ru
` (3 preceding siblings ...)
2020-06-15 11:23 ` ungift-ed at ya dot ru
@ 2020-06-15 11:24 ` ungift-ed at ya dot ru
2020-06-15 11:25 ` marxin at gcc dot gnu.org
` (8 subsequent siblings)
13 siblings, 0 replies; 15+ messages in thread
From: ungift-ed at ya dot ru @ 2020-06-15 11:24 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95671
--- Comment #5 from Maxim Britov <ungift-ed at ya dot ru> ---
Created attachment 48732
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48732&action=edit
some minimal config for kerknel 5.7 for reproduce
^ permalink raw reply [flat|nested] 15+ messages in thread
* [Bug target/95671] Fails to build kernel 5.7 with -march=bdver{2,3,4} workaround -mno-tbm
2020-06-14 11:17 [Bug c/95671] New: Fails to build kernel 5.7 with -march=bdver{2,3,4} workaround -mno-tbm ungift-ed at ya dot ru
` (4 preceding siblings ...)
2020-06-15 11:24 ` ungift-ed at ya dot ru
@ 2020-06-15 11:25 ` marxin at gcc dot gnu.org
2020-06-15 11:57 ` schwab@linux-m68k.org
` (7 subsequent siblings)
13 siblings, 0 replies; 15+ messages in thread
From: marxin at gcc dot gnu.org @ 2020-06-15 11:25 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95671
--- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Maxim Britov from comment #4)
> (In reply to Martin Liška from comment #1)
> > Can you please attach a pre-processed file for an object that fails with
> > objtool?
>
> Heh... I'm afraid I need some howto for this... :(
>
Add -E option to the compilation and attach the output file.
^ permalink raw reply [flat|nested] 15+ messages in thread
* [Bug target/95671] Fails to build kernel 5.7 with -march=bdver{2,3,4} workaround -mno-tbm
2020-06-14 11:17 [Bug c/95671] New: Fails to build kernel 5.7 with -march=bdver{2,3,4} workaround -mno-tbm ungift-ed at ya dot ru
` (5 preceding siblings ...)
2020-06-15 11:25 ` marxin at gcc dot gnu.org
@ 2020-06-15 11:57 ` schwab@linux-m68k.org
2020-06-15 12:05 ` marxin at gcc dot gnu.org
` (6 subsequent siblings)
13 siblings, 0 replies; 15+ messages in thread
From: schwab@linux-m68k.org @ 2020-06-15 11:57 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95671
--- Comment #7 from Andreas Schwab <schwab@linux-m68k.org> ---
make arch/x86/entry/vsyscall/vsyscall_64.i
^ permalink raw reply [flat|nested] 15+ messages in thread
* [Bug target/95671] Fails to build kernel 5.7 with -march=bdver{2,3,4} workaround -mno-tbm
2020-06-14 11:17 [Bug c/95671] New: Fails to build kernel 5.7 with -march=bdver{2,3,4} workaround -mno-tbm ungift-ed at ya dot ru
` (6 preceding siblings ...)
2020-06-15 11:57 ` schwab@linux-m68k.org
@ 2020-06-15 12:05 ` marxin at gcc dot gnu.org
2020-06-15 12:08 ` marxin at gcc dot gnu.org
` (5 subsequent siblings)
13 siblings, 0 replies; 15+ messages in thread
From: marxin at gcc dot gnu.org @ 2020-06-15 12:05 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95671
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |NEW
--- Comment #8 from Martin Liška <marxin at gcc dot gnu.org> ---
I've got a reduced test-case:
$ cat lbr.i
int a, c, d;
long b;
void
fn1() {
for (; c; c++) {
int e, f = 0;
if (a) {
e = !(d & 1ULL << 63);
f = e;
}
d = fn1;
b = f;
}
}
$ gcc lbr.i -c -O2 -march=bdver2 -c &&
~/Programming/linux/tools/objtool/objtool check --uaccess lbr.o
lbr.i: In function ‘fn1’:
lbr.i:12:7: warning: assignment to ‘int’ from ‘void (*)()’ makes integer from
pointer without a cast [-Wint-conversion]
12 | d = fn1;
| ^
lbr.o: warning: objtool: fn1()+0x26: can't find jump dest instruction at
.text+0x36
disassembly:
26: 74 0e je 36 <fn1+0x36>
28: 48 0f ba fa 1f btc $0x1f,%rdx
2d: 8f ea f8 10 ca 1f 01 bextr $0x11f,%rdx,%rcx
34: 00 00
36: ff c0 inc %eax
It seems to me bextr is not supported (parsed) by objtool?
^ permalink raw reply [flat|nested] 15+ messages in thread
* [Bug target/95671] Fails to build kernel 5.7 with -march=bdver{2,3,4} workaround -mno-tbm
2020-06-14 11:17 [Bug c/95671] New: Fails to build kernel 5.7 with -march=bdver{2,3,4} workaround -mno-tbm ungift-ed at ya dot ru
` (7 preceding siblings ...)
2020-06-15 12:05 ` marxin at gcc dot gnu.org
@ 2020-06-15 12:08 ` marxin at gcc dot gnu.org
2020-06-15 12:09 ` ungift-ed at ya dot ru
` (4 subsequent siblings)
13 siblings, 0 replies; 15+ messages in thread
From: marxin at gcc dot gnu.org @ 2020-06-15 12:08 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95671
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |WAITING
^ permalink raw reply [flat|nested] 15+ messages in thread
* [Bug target/95671] Fails to build kernel 5.7 with -march=bdver{2,3,4} workaround -mno-tbm
2020-06-14 11:17 [Bug c/95671] New: Fails to build kernel 5.7 with -march=bdver{2,3,4} workaround -mno-tbm ungift-ed at ya dot ru
` (8 preceding siblings ...)
2020-06-15 12:08 ` marxin at gcc dot gnu.org
@ 2020-06-15 12:09 ` ungift-ed at ya dot ru
2020-06-15 12:17 ` marxin at gcc dot gnu.org
` (3 subsequent siblings)
13 siblings, 0 replies; 15+ messages in thread
From: ungift-ed at ya dot ru @ 2020-06-15 12:09 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95671
--- Comment #9 from Maxim Britov <ungift-ed at ya dot ru> ---
Created attachment 48733
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48733&action=edit
gcc -E ...
I believe attachment is what you aksed. I did
gcc -E -Wp,-MD,arch/x86/entry/vsyscall/.vsyscall_64.o.d -nostdinc -isystem
/usr/lib/gcc/x86_64-pc-linux-gnu/10.1.0/include -I./arch/x86/include
-I./arch/x86/include/generated -I./include -I./arch/x86/include/uapi
-I./arch/x86/include/generated/uapi -I./include/uapi -I./include/generated/uapi
-include ./include/linux/kconfig.h -include ./include/linux/compiler_types.h
-D__KERNEL__ -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs
-fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE
-Werror=implicit-function-declaration -Werror=implicit-int -Wno-format-security
-std=gnu89 -mno-sse -mno-mmx -mno-sse2 -mno-3dnow -mno-avx -m64 -falign-jumps=1
-falign-loops=1 -mno-80387 -mno-fp-ret-in-387 -mpreferred-stack-boundary=3
-mskip-rax-setup -march=bdver2 -mno-red-zone -mcmodel=kernel -Wno-sign-compare
-fno-asynchronous-unwind-tables -fno-delete-null-pointer-checks
-Wno-frame-address -Wno-format-truncation -Wno-format-overflow
-Wno-address-of-packed-member -O2 -fno-allow-store-data-races
-Wframe-larger-than=2048 -fno-stack-protector -Wno-unused-but-set-variable
-Wimplicit-fallthrough -Wno-unused-const-variable -fno-omit-frame-pointer
-fno-optimize-sibling-calls -fno-var-tracking-assignments
-Wdeclaration-after-statement -Wvla -Wno-pointer-sign -Wno-stringop-truncation
-Wno-zero-length-bounds -Wno-array-bounds -Wno-stringop-overflow -Wno-restrict
-Wno-maybe-uninitialized -fno-strict-overflow -fno-merge-all-constants
-fmerge-constants -fno-stack-check -fconserve-stack -Werror=date-time
-Werror=incompatible-pointer-types -Werror=designated-init
-fmacro-prefix-map=./= -Wno-packed-not-aligned
-DKBUILD_MODFILE='"arch/x86/entry/vsyscall/vsyscall_64"'
-DKBUILD_BASENAME='"vsyscall_64"' -DKBUILD_MODNAME='"vsyscall_64"' -c -o
arch/x86/entry/vsyscall/vsyscall_64.o arch/x86/entry/vsyscall/vsyscall_64.c
Fail was:
make -f ./scripts/Makefile.build obj=arch/x86/entry/vsyscall \
\
need-builtin=1 \
need-modorder=1
gcc -Wp,-MD,arch/x86/entry/vsyscall/.vsyscall_64.o.d -nostdinc -isystem
/usr/lib/gcc/x86_64-pc-linux-gnu/10.1.0/include -I./arch/x86/include
-I./arch/x86/include/generated -I./include -I./arch/x86/include/uapi
-I./arch/x86/include/generated/uapi -I./include/uapi -I./include/generated/uapi
-include ./include/linux/kconfig.h -include ./include/linux/compiler_types.h
-D__KERNEL__ -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs
-fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE
-Werror=implicit-function-declaration -Werror=implicit-int -Wno-format-security
-std=gnu89 -mno-sse -mno-mmx -mno-sse2 -mno-3dnow -mno-avx -m64 -falign-jumps=1
-falign-loops=1 -mno-80387 -mno-fp-ret-in-387 -mpreferred-stack-boundary=3
-mskip-rax-setup -march=bdver2 -mno-red-zone -mcmodel=kernel -Wno-sign-compare
-fno-asynchronous-unwind-tables -fno-delete-null-pointer-checks
-Wno-frame-address -Wno-format-truncation -Wno-format-overflow
-Wno-address-of-packed-member -O2 -fno-allow-store-data-races
-Wframe-larger-than=2048 -fno-stack-protector -Wno-unused-but-set-variable
-Wimplicit-fallthrough -Wno-unused-const-variable -fno-omit-frame-pointer
-fno-optimize-sibling-calls -fno-var-tracking-assignments
-Wdeclaration-after-statement -Wvla -Wno-pointer-sign -Wno-stringop-truncation
-Wno-zero-length-bounds -Wno-array-bounds -Wno-stringop-overflow -Wno-restrict
-Wno-maybe-uninitialized -fno-strict-overflow -fno-merge-all-constants
-fmerge-constants -fno-stack-check -fconserve-stack -Werror=date-time
-Werror=incompatible-pointer-types -Werror=designated-init
-fmacro-prefix-map=./= -Wno-packed-not-aligned
-DKBUILD_MODFILE='"arch/x86/entry/vsyscall/vsyscall_64"'
-DKBUILD_BASENAME='"vsyscall_64"' -DKBUILD_MODNAME='"vsyscall_64"' -c -o
arch/x86/entry/vsyscall/vsyscall_64.o arch/x86/entry/vsyscall/vsyscall_64.c
./tools/objtool/objtool check --uaccess
arch/x86/entry/vsyscall/vsyscall_64.o
arch/x86/entry/vsyscall/vsyscall_64.o: warning: objtool:
emulate_vsyscall()+0x60: can't find jump dest instruction at .text+0xca
make[3]: *** [scripts/Makefile.build:267:
arch/x86/entry/vsyscall/vsyscall_64.o] Error 255
make[3]: *** Deleting file 'arch/x86/entry/vsyscall/vsyscall_64.o'
make[2]: *** [scripts/Makefile.build:488: arch/x86/entry/vsyscall] Error 2
make[1]: *** [scripts/Makefile.build:488: arch/x86/entry] Error 2
make: *** [Makefile:1729: arch/x86] Error 2
^ permalink raw reply [flat|nested] 15+ messages in thread
* [Bug target/95671] Fails to build kernel 5.7 with -march=bdver{2,3,4} workaround -mno-tbm
2020-06-14 11:17 [Bug c/95671] New: Fails to build kernel 5.7 with -march=bdver{2,3,4} workaround -mno-tbm ungift-ed at ya dot ru
` (9 preceding siblings ...)
2020-06-15 12:09 ` ungift-ed at ya dot ru
@ 2020-06-15 12:17 ` marxin at gcc dot gnu.org
2020-06-15 12:34 ` jakub at gcc dot gnu.org
` (2 subsequent siblings)
13 siblings, 0 replies; 15+ messages in thread
From: marxin at gcc dot gnu.org @ 2020-06-15 12:17 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95671
--- Comment #10 from Martin Liška <marxin at gcc dot gnu.org> ---
Yep, I've already created a reduced-testcase myself:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95671#c6
^ permalink raw reply [flat|nested] 15+ messages in thread
* [Bug target/95671] Fails to build kernel 5.7 with -march=bdver{2,3,4} workaround -mno-tbm
2020-06-14 11:17 [Bug c/95671] New: Fails to build kernel 5.7 with -march=bdver{2,3,4} workaround -mno-tbm ungift-ed at ya dot ru
` (10 preceding siblings ...)
2020-06-15 12:17 ` marxin at gcc dot gnu.org
@ 2020-06-15 12:34 ` jakub at gcc dot gnu.org
2020-06-15 13:18 ` jakub at gcc dot gnu.org
2020-06-15 14:41 ` ungift-ed at ya dot ru
13 siblings, 0 replies; 15+ messages in thread
From: jakub at gcc dot gnu.org @ 2020-06-15 12:34 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95671
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
Resolution|--- |INVALID
Status|WAITING |RESOLVED
--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
That is clearly a kernel/objtool bug.
Seems it has its own x86_64 instruction decoder and has some VEX decoding code,
but either not well tested or not working in this particular case.
Kernel doesn't normally use floating point or SIMD instructions, therefore I'd
expect that it only rarely uses VEX encoded instructions, and BEXTR is one of
the few general purpose instructions that are VEX encoded.
^ permalink raw reply [flat|nested] 15+ messages in thread
* [Bug target/95671] Fails to build kernel 5.7 with -march=bdver{2,3,4} workaround -mno-tbm
2020-06-14 11:17 [Bug c/95671] New: Fails to build kernel 5.7 with -march=bdver{2,3,4} workaround -mno-tbm ungift-ed at ya dot ru
` (11 preceding siblings ...)
2020-06-15 12:34 ` jakub at gcc dot gnu.org
@ 2020-06-15 13:18 ` jakub at gcc dot gnu.org
2020-06-15 14:41 ` ungift-ed at ya dot ru
13 siblings, 0 replies; 15+ messages in thread
From: jakub at gcc dot gnu.org @ 2020-06-15 13:18 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95671
--- Comment #12 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Please report it to kernel bugzilla or whatever objtool has bugtracker.
https://bugs.gentoo.org/642924
is very likely exactly the same thing, but not sure if they have reported it
upstream.
^ permalink raw reply [flat|nested] 15+ messages in thread
* [Bug target/95671] Fails to build kernel 5.7 with -march=bdver{2,3,4} workaround -mno-tbm
2020-06-14 11:17 [Bug c/95671] New: Fails to build kernel 5.7 with -march=bdver{2,3,4} workaround -mno-tbm ungift-ed at ya dot ru
` (12 preceding siblings ...)
2020-06-15 13:18 ` jakub at gcc dot gnu.org
@ 2020-06-15 14:41 ` ungift-ed at ya dot ru
13 siblings, 0 replies; 15+ messages in thread
From: ungift-ed at ya dot ru @ 2020-06-15 14:41 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95671
--- Comment #13 from Maxim Britov <ungift-ed at ya dot ru> ---
New report https://bugzilla.kernel.org/show_bug.cgi?id=208187
Thanks!
^ permalink raw reply [flat|nested] 15+ messages in thread