Hi Jens, Thanks for looking! Lots more output below. Feel free to ask for more info you tink could help.`
On Wed, Jul 15, 2026 at 10:06:20AM +0200, Jens Remus wrote: > On 7/14/2026 2:28 AM, Brian Norris wrote: > > On Tue, May 19, 2026 at 01:05:23PM +0200, Jens Remus wrote: > > > I also work at the same company as Dylan and Mostafa, and am therefore > > probably using the same company-maintained Linux distribution. > > > >> On 5/18/2026 7:55 PM, Dylan Hatch wrote: > >>> On Fri, May 15, 2026 at 4:32 AM Mostafa Saleh <[email protected]> wrote: > >>>> Not sure if related, but after updating my toolchain > >>>> (aarch64-linux-gnu-gcc (Debian 15.2.0-4) 15.2.0), I hit link errors: > >>>> ld.lld: error: arch/arm64/kernel/vdso/vgettimeofday.o:(.sframe) is being > >>>> placed in '.sframe' > >>>> ld.lld: error: arch/arm64/kernel/vdso/vgetrandom.o:(.sframe) is being > >>>> placed in '.sframe` > > My understanding of above message is that the linker complains that the > input object (e.g. vgettimeofday.o) has an .sframe section for which > the linker script does not have any rule, so that it defaults to place > it in .sframe in the output, which could not be the desired result. Not sure if it's obvious to you, but I also found a few more details: * This is most noticeable with CONFIG_WERROR=y, which turns the linker warning into an error. * It appears both with LD=ld.lld and with the default (bfd linker). bfd shows: /usr/bin/aarch64-linux-gnu-ld.bfd: error: unplaced orphan section `.sframe' from `arch/arm64/kernel/vdso/vgettimeofday.o' /usr/bin/aarch64-linux-gnu-ld.bfd: error: unplaced orphan section `.sframe' from `arch/arm64/kernel/vdso/vgetrandom.o' Otherwise, I don't have to do much special to hit this. Just cross-compile ARCH=arm64 defconfig. > > I've also been hitting this for some time, and I'd like to see if I can > > figure out what's going wrong. My current workaround is: > > > > --- a/Makefile > > +++ b/Makefile > > @@ -946,6 +946,8 @@ ifdef CONFIG_CC_IS_GCC > > KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) > > KBUILD_CFLAGS += $(call cc-option,-fno-allow-store-data-races) > > endif > > +# No sframe generation for kernel if enabled by default > > +KBUILD_CFLAGS += $(call cc-option,-Xassembler --gsframe=no) > > > > ifdef CONFIG_READABLE_ASM > > # Disable optimizations that make assembler listings hard to read. > > > >>> Previously when developing against the SFrame V2 format, I had fixed > >>> these warnings with the VDSO Makefile change currently in this series: > >>> > >>> diff --git a/arch/arm64/kernel/vdso/Makefile > >>> b/arch/arm64/kernel/vdso/Makefile > >>> index 7dec05dd33b7..c60ef921956f 100644 > >>> --- a/arch/arm64/kernel/vdso/Makefile > >>> +++ b/arch/arm64/kernel/vdso/Makefile > >>> @@ -38,7 +38,7 @@ ccflags-y += -DDISABLE_BRANCH_PROFILING -DBUILD_VDSO > >>> CC_FLAGS_REMOVE_VDSO := $(CC_FLAGS_FTRACE) -Os $(CC_FLAGS_SCS) \ > >>> $(RANDSTRUCT_CFLAGS) $(KSTACK_ERASE_CFLAGS) \ > >>> $(GCC_PLUGINS_CFLAGS) \ > >>> - $(CC_FLAGS_LTO) $(CC_FLAGS_CFI) \ > >>> + $(CC_FLAGS_LTO) $(CC_FLAGS_CFI) > >>> $(CC_FLAGS_SFRAME) \ > >>> -Wmissing-prototypes -Wmissing-declarations > >>> > >>> CC_FLAGS_ADD_VDSO := -O2 -mcmodel=tiny -fasynchronous-unwind-tables > >>> > >>> But the warnings seem to have returned after upgrading my toolchain, > >>> possibly due to SFrame V3 or some confounding change in GCC. The > >>> --gsframe in the assembler should be set to 'no' by default, so > >>> perhaps GCC is providing an override --gsframe internally? > >> > >> Could it be that your build of binutils was configured with > >> --enable-default-sframe, so that the GNU assembler defaults to generate > >> .sframe? AFAIK this configure option was meant for distributors and > >> package maintainers. > >> > >> You can check as follows whether --gsframe defaults to "no" or "yes": > >> > >> $ as --help | grep -A1 gsframe > >> --gsframe[={no|yes}] whether to generate SFrame stack trace > >> information > >> (default: no) > >> ... > > > > $ aarch64-linux-gnu-as --help | grep -A1 gsframe > > --gsframe[={no|yes}] whether to generate SFrame stack trace information > > (default: no) > > -- > > --gsframe-<N> generate SFrame version <N> information. 3 == <N> > > --scfi=experimental Synthesize DWARF CFI for hand-written asm > > > >> Maybe build the VDSO separately with V=1 to see what assembler/compiler > >> options are effectively used (e.g. for vgettimeofday.o and vgetrandom.o > >> mentioned in the linker error message above)? > > > > A slightly tweaked version of my vgetrandom.o build line: > > > > # CC arch/arm64/kernel/vdso/vgetrandom.o > > aarch64-linux-gnu-gcc -Wp,-MMD,arch/arm64/kernel/vdso/.vgetrandom.o.d > > -nostdinc -I./arch/arm64/include -I./arch/arm64/include/generated > > -I./include -I./include -I./arch/arm64/include/uapi > > -I./arch/arm64/include/generated/uapi -I./include/uapi > > -I./include/generated/uapi -include ./include/linux/compiler-version.h > > -include ./include/linux/kconfig.h -include > > ./include/linux/compiler_types.h -D__KERNEL__ -mlittle-endian > > -DCC_USING_PATCHABLE_FUNCTION_ENTRY -DKASAN_SHADOW_SCALE_SHIFT= -Werror > > -fshort-wchar -funsigned-char -fno-common -fno-PIE -fno-strict-aliasing > > -std=gnu11 -fms-extensions -mgeneral-regs-only > > -DCONFIG_CC_HAS_K_CONSTRAINT=1 -Wno-psabi -mabi=lp64 > > -fno-asynchronous-unwind-tables -fno-unwind-tables > > -mbranch-protection=pac-ret -Wa,-march=armv8.5-a > > -DARM64_ASM_ARCH='"armv8.5-a"' -DKASAN_SHADOW_SCALE_SHIFT= > > -fno-delete-null-pointer-checks -O2 -fno-allow-store-data-races > > -fstack-protector-strong -fno-omit-frame-pointer > > -fno-optimize-sibling-calls -ftrivial-auto-var-init=zero > > -fzero-init-padding-bits=all -fno-stack-clash-protection > > -fno-inline-functions-called-once -fmin-function-alignment=8 > > -fstrict-flex-arrays=3 -fno-strict-overflow -fno-stack-check > > -fconserve-stack -fno-builtin-wcslen -Wall -Wextra -Wundef > > -Werror=implicit-function-declaration -Werror=implicit-int > > -Werror=return-type -Werror=strict-prototypes -Wno-format-security > > -Wno-trigraphs -Wno-frame-address -Wno-address-of-packed-member > > -Wframe-larger-than=2048 -Wno-main -Wno-type-limits -Wno-dangling-pointer > > -Wvla-larger-than=1 -Wno-pointer-sign -Wcast-function-type > > -Wno-unterminated-string-initialization -Wno-array-bounds > > -Wno-stringop-overflow -Wno-alloc-size-larger-than -Wimplicit-fallthrough=5 > > -Werror=date-time -Werror=incompatible-pointer-types > > -Werror=designated-init -Wenum-conversion -Wunused > > -Wno-unused-but-set-variable -Wno-unused-const-variable > > -Wno-packed-not-aligned -Wno-format-overflow -Wno-format-truncation > > -Wno-stringop-truncation -Wno-override-init -Wno-missing-field-initializers > > -Wno-shift-negative-value -Wno-maybe-uninitialized -Wno-sign-compare > > -Wno-unused-parameter -g -mstack-protector-guard=sysreg > > -mstack-protector-guard-reg=sp_el0 -mstack-protector-guard-offset=1344 > > -fno-common -fno-builtin -fno-stack-protector -ffixed-x18 > > -DDISABLE_BRANCH_PROFILING -DBUILD_VDSO -O2 -mcmodel=tiny > > -fasynchronous-unwind-tables -include ./lib/vdso/getrandom.c > > -I./arch/arm64/kernel/vdso -Iarch/arm64/kernel/vdso > > -DKBUILD_MODFILE='"arch/arm64/kernel/vdso/vgetrandom"' > > -DKBUILD_BASENAME='"vgetrandom"' -DKBUILD_MODNAME='"vgetrandom"' > > -D__KBUILD_MODNAME=vgetrandom -c -o arch/arm64/kernel/vdso/vgetrandom.o > > ./arch/arm64/kernel/vdso/vgetrandom.c > > That command line does not have any --gsframe[-3] (e.g. -Wa,--gsframe). > I am not aware of any binutils release / repository state where the > --gsframe default was broken. FWIW, I'm usually testing on both v7.1 and approx v7.2-rc3, to make sure my results are consistent, and it's not already somehow fixed. > @Indu: Do you have any idea what could be going on? > > > I mostly don't know what I'm looking for w.r.t. gsframe features, but > > I'm willing to poke at my compiler/assembler/build-process. > > Could it be that your gcc injects --gsframe e.g. via its spec file? > Maybe that would show up if you run above command manually and append > gcc option -v? I've dumped most of the output below. I see that the 'as' invocation includes --gsframe, but I'm not sure why. $ aarch64-linux-gnu-gcc -Wp,-MMD,arch/arm64/kernel/vdso/.vgetrandom.o.d -nostdinc -I./arch/arm64/include -I./arch/arm64/include/generated -I./include -I./include -I./arch/arm64/include/uapi -I./arch/arm64/include/generated/uapi -I./include/uapi -I./include/generated/uapi -include ./include/linux/compiler-version.h -include ./include/linux/kconfig.h -include ./include/linux/compiler_types.h -D__KERNEL__ -mlittle-endian -DKASAN_SHADOW_SCALE_SHIFT= -Werror -fshort-wchar -funsigned-char -fno-common -fno-PIE -fno-strict-aliasing -std=gnu11 -fms-extensions -mgeneral-regs-only -DCONFIG_CC_HAS_K_CONSTRAINT=1 -Wno-psabi -mabi=lp64 -fno-asynchronous-unwind-tables -fno-unwind-tables -mbranch-protection=pac-ret -Wa,-march=armv8.5-a -DARM64_ASM_ARCH='"armv8.5-a"' -DKASAN_SHADOW_SCALE_SHIFT= -fno-delete-null-pointer-checks -O2 -fno-allow-store-data-races -fstack-protector-strong -fno-omit-frame-pointer -fno-optimize-sibling-calls -ftrivial-auto-var-init=zero -fzero-init-padding-bits=all -fno-stack-clash-protection -fmin-function-alignment=4 -fstrict-flex-arrays=3 -fno-strict-overflow -fno-stack-check -fconserve-stack -fno-builtin-wcslen -Wall -Wextra -Wundef -Werror=implicit-function-declaration -Werror=implicit-int -Werror=return-type -Werror=strict-prototypes -Wno-format-security -Wno-trigraphs -Wno-frame-address -Wno-address-of-packed-member -Wframe-larger-than=2048 -Wno-main -Wno-type-limits -Wno-dangling-pointer -Wvla-larger-than=1 -Wno-pointer-sign -Wcast-function-type -Wno-unterminated-string-initialization -Wno-array-bounds -Wno-stringop-overflow -Wno-alloc-size-larger-than -Wimplicit-fallthrough=5 -Werror=date-time -Werror=incompatible-pointer-types -Werror=designated-init -Wenum-conversion -Wunused -Wno-unused-but-set-variable -Wno-unused-const-variable -Wno-packed-not-aligned -Wno-format-overflow -Wno-format-truncation -Wno-stringop-truncation -Wno-override-init -Wno-missing-field-initializers -Wno-shift-negative-value -Wno-maybe-uninitialized -Wno-sign-compare -Wno-unused-parameter -g -fno-var-tracking -femit-struct-debug-baseonly -mstack-protector-guard=sysreg -mstack-protector-guard-reg=sp_el0 -mstack-protector-guard-offset=1344 -fno-common -fno-builtin -fno-stack-protector -ffixed-x18 -DDISABLE_BRANCH_PROFILING -DBUILD_VDSO -O2 -mcmodel=tiny -fasynchronous-unwind-tables -include $LINUX/lib/vdso/getrandom.c -DKBUILD_MODFILE='"arch/arm64/kernel/vdso/vgetrandom"' -DKBUILD_BASENAME='"vgetrandom"' -DKBUILD_MODNAME='"vgetrandom"' -D__KBUILD_MODNAME=vgetrandom -c -o arch/arm64/kernel/vdso/vgetrandom.o arch/arm64/kernel/vdso/vgetrandom.c -v Using built-in specs. 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--host=x86_64-linux-gnu --target=aarch64-linux-gnu --program-prefix=aarch64-linux-gnu- --includedir=/usr/aarch64-linux-gnu/include --with-build-config=bootstrap-lto-lean --enable-link-serialization=32 Thread model: posix Supported LTO compression algorithms: zlib zstd gcc version 15.2.0 (Debian 15.2.0-4) COLLECT_GCC_OPTIONS='-nostdinc' '-I' './arch/arm64/include' '-I' './arch/arm64/include/generated' '-I' './include' '-I' './include' '-I' './arch/arm64/include/uapi' '-I' './arch/arm64/include/generated/uapi' '-I' './include/uapi' '-I' './include/generated/uapi' '-include' './include/linux/compiler-version.h' '-include' './include/linux/kconfig.h' '-include' './include/linux/compiler_types.h' '-D' '__KERNEL__' '-mlittle-endian' '-D' 'KASAN_SHADOW_SCALE_SHIFT=' '-Werror' '-fshort-wchar' '-funsigned-char' '-fno-PIE' '-fno-strict-aliasing' '-std=gnu11' '-fms-extensions' '-mgeneral-regs-only' '-D' 'CONFIG_CC_HAS_K_CONSTRAINT=1' '-Wno-psabi' '-mabi=lp64' '-fno-unwind-tables' 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'-Wimplicit-fallthrough=5' '-Werror=date-time' '-Werror=incompatible-pointer-types' '-Werror=designated-init' '-Wenum-conversion' '-Wunused' '-Wno-unused-but-set-variable' '-Wunused-const-variable=0' '-Wno-packed-not-aligned' '-Wformat-overflow=0' '-Wformat-truncation=0' '-Wno-stringop-truncation' '-Wno-override-init' '-Wno-missing-field-initializers' '-Wno-shift-negative-value' '-Wno-maybe-uninitialized' '-Wno-sign-compare' '-Wno-unused-parameter' '-g' '-fno-var-tracking' '-femit-struct-debug-baseonly' '-mstack-protector-guard=sysreg' '-mstack-protector-guard-reg=sp_el0' '-mstack-protector-guard-offset=1344' '-fno-common' '-fno-builtin' '-fno-stack-protector' '-ffixed-x18' '-D' 'DISABLE_BRANCH_PROFILING' '-D' 'BUILD_VDSO' '-O2' '-mcmodel=tiny' '-fasynchronous-unwind-tables' '-include' '$LINUX/lib/vdso/getrandom.c' '-D' 'KBUILD_MODFILE="arch/arm64/kernel/vdso/vgetrandom"' '-D' 'KBUILD_BASENAME="vgetrandom"' '-D' 'KBUILD_MODNAME="vgetrandom"' '-D' '__KBUILD_MODNAME=vgetrandom' '-c' '-o' 'arch/arm64/kernel/vdso/vgetrandom.o' '-v' '-dumpdir' 'arch/arm64/kernel/vdso/' /usr/libexec/gcc-cross/aarch64-linux-gnu/15/cc1 -quiet -nostdinc -v -I ./arch/arm64/include -I ./arch/arm64/include/generated -I ./include -I ./include -I ./arch/arm64/include/uapi -I ./arch/arm64/include/generated/uapi -I ./include/uapi -I ./include/generated/uapi -imultiarch aarch64-linux-gnu -D __KERNEL__ -D KASAN_SHADOW_SCALE_SHIFT= -D CONFIG_CC_HAS_K_CONSTRAINT=1 -D ARM64_ASM_ARCH="armv8.5-a" -D KASAN_SHADOW_SCALE_SHIFT= -D DISABLE_BRANCH_PROFILING -D BUILD_VDSO -D KBUILD_MODFILE="arch/arm64/kernel/vdso/vgetrandom" -D KBUILD_BASENAME="vgetrandom" -D KBUILD_MODNAME="vgetrandom" -D __KBUILD_MODNAME=vgetrandom -include ./include/linux/compiler-version.h -include ./include/linux/kconfig.h -include ./include/linux/compiler_types.h -include /usr/local/google/home/briannorris/git/linux/lib/vdso/getrandom.c -MMD arch/arm64/kernel/vdso/.vgetrandom.o.d arch/arm64/kernel/vdso/vgetrandom.c -quiet -dumpdir arch/arm64/kernel/vdso/ -dumpbase vgetrandom.c -dumpbase-ext .c -mlittle-endian -mgeneral-regs-only -mabi=lp64 -mbranch-protection=pac-ret -mstack-protector-guard=sysreg -mstack-protector-guard-reg=sp_el0 -mstack-protector-guard-offset=1344 -mcmodel=tiny -g -O2 -O2 -Werror -Wno-psabi -Wall -Wextra -Wundef -Werror=implicit-function-declaration -Werror=implicit-int -Werror=return-type -Werror=strict-prototypes -Wno-format-security -Wno-trigraphs -Wno-frame-address -Wno-address-of-packed-member -Wframe-larger-than=2048 -Wno-main -Wno-type-limits -Wdangling-pointer=0 -Wvla-larger-than=1 -Wno-pointer-sign -Wcast-function-type -Wno-unterminated-string-initialization -Warray-bounds=0 -Wstringop-overflow=0 -Walloc-size-larger-than=18446744073709551615EiB -Wimplicit-fallthrough=5 -Werror=date-time -Werror=incompatible-pointer-types -Werror=designated-init -Wenum-conversion -Wunused -Wno-unused-but-set-variable -Wunused-const-variable=0 -Wno-packed-not-aligned -Wformat-overflow=0 -Wformat-truncation=0 -Wno-stringop-truncation -Wno-override-init -Wno-missing-field-initializers -Wno-shift-negative-value -Wno-maybe-uninitialized -Wno-sign-compare -Wno-unused-parameter -std=gnu11 -version -fshort-wchar -funsigned-char -fno-PIE -fno-strict-aliasing -fms-extensions -fno-unwind-tables -fno-delete-null-pointer-checks -fno-allow-store-data-races -fstack-protector-strong -fno-omit-frame-pointer -fno-optimize-sibling-calls -ftrivial-auto-var-init=zero -fzero-init-padding-bits=all -fno-stack-clash-protection -fmin-function-alignment=4 -fstrict-flex-arrays=3 -fno-strict-overflow -fstack-check=no -fconserve-stack -fno-builtin-wcslen -fno-var-tracking -femit-struct-debug-baseonly -fno-common -fno-builtin -fno-stack-protector -ffixed-x18 -fasynchronous-unwind-tables -fasynchronous-unwind-tables -o /tmp/cc6nO0fY.s GNU C11 (Debian 15.2.0-4) version 15.2.0 (aarch64-linux-gnu) compiled by GNU C version 15.2.0, GMP version 6.3.0, MPFR version 4.2.2, MPC version 1.3.1, isl version isl-0.27-GMP GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 ignoring duplicate directory "./include" #include "..." search starts here: #include <...> search starts here: ./arch/arm64/include ./arch/arm64/include/generated ./include ./arch/arm64/include/uapi ./arch/arm64/include/generated/uapi ./include/uapi ./include/generated/uapi End of search list. 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'-ftrivial-auto-var-init=zero' '-fzero-init-padding-bits=all' '-fno-stack-clash-protection' '-fmin-function-alignment=4' '-fstrict-flex-arrays=3' '-fno-strict-overflow' '-fstack-check=no' '-fconserve-stack' '-fno-builtin-wcslen' '-Wall' '-Wextra' '-Wundef' '-Werror=implicit-function-declaration' '-Werror=implicit-int' '-Werror=return-type' '-Werror=strict-prototypes' '-Wno-format-security' '-Wno-trigraphs' '-Wno-frame-address' '-Wno-address-of-packed-member' '-Wframe-larger-than=2048' '-Wno-main' '-Wno-type-limits' '-Wdangling-pointer=0' '-Wvla-larger-than=1' '-Wno-pointer-sign' '-Wcast-function-type' '-Wno-unterminated-string-initialization' '-Warray-bounds=0' '-Wstringop-overflow=0' '-Walloc-size-larger-than=$XXX' '-Wimplicit-fallthrough=5' '-Werror=date-time' '-Werror=incompatible-pointer-types' '-Werror=designated-init' '-Wenum-conversion' '-Wunused' '-Wno-unused-but-set-variable' '-Wunused-const-variable=0' '-Wno-packed-not-aligned' '-Wformat-overflow=0' '-Wformat-truncation=0' '-Wno-stringop-truncation' '-Wno-override-init' '-Wno-missing-field-initializers' '-Wno-shift-negative-value' '-Wno-maybe-uninitialized' '-Wno-sign-compare' '-Wno-unused-parameter' '-g' '-fno-var-tracking' '-femit-struct-debug-baseonly' '-mstack-protector-guard=sysreg' '-mstack-protector-guard-reg=sp_el0' '-mstack-protector-guard-offset=1344' '-fno-common' '-fno-builtin' '-fno-stack-protector' '-ffixed-x18' '-D' 'DISABLE_BRANCH_PROFILING' '-D' 'BUILD_VDSO' '-O2' '-mcmodel=tiny' '-fasynchronous-unwind-tables' '-include' '/usr/local/google/home/briannorris/git/linux/lib/vdso/getrandom.c' '-D' 'KBUILD_MODFILE="arch/arm64/kernel/vdso/vgetrandom"' '-D' 'KBUILD_BASENAME="vgetrandom"' '-D' 'KBUILD_MODNAME="vgetrandom"' '-D' '__KBUILD_MODNAME=vgetrandom' '-c' '-o' 'arch/arm64/kernel/vdso/vgetrandom.o' '-v' '-dumpdir' 'arch/arm64/kernel/vdso/' /usr/lib/gcc-cross/aarch64-linux-gnu/15/../../../../aarch64-linux-gnu/bin/as -v -I ./arch/arm64/include -I ./arch/arm64/include/generated -I ./include -I ./include -I ./arch/arm64/include/uapi -I ./arch/arm64/include/generated/uapi -I ./include/uapi -I ./include/generated/uapi --gsframe --gdwarf-5 -EL -mabi=lp64 -march=armv8.5-a -o arch/arm64/kernel/vdso/vgetrandom.o /tmp/cc6nO0fY.s GNU assembler version 2.46.50 (aarch64-linux-gnu) using BFD version (GNU Binutils for Debian) 2.46.50.20260617 COMPILER_PATH=/usr/libexec/gcc-cross/aarch64-linux-gnu/15/:/usr/libexec/gcc-cross/aarch64-linux-gnu/15/:/usr/libexec/gcc-cross/aarch64-linux-gnu/:/usr/lib/gcc-cross/aarch64-linux-gnu/15/:/usr/lib/gcc-cross/aarch64-linux-gnu/:/usr/lib/gcc-cross/aarch64-linux-gnu/15/../../../../aarch64-linux-gnu/bin/ LIBRARY_PATH=/usr/lib/gcc-cross/aarch64-linux-gnu/15/:/usr/lib/gcc-cross/aarch64-linux-gnu/15/../../../../aarch64-linux-gnu/lib/../lib/:/lib/aarch64-linux-gnu/:/lib/../lib/:/usr/lib/aarch64-linux-gnu/:/usr/lib/../lib/:/usr/lib/gcc-cross/aarch64-linux-gnu/15/../../../../aarch64-linux-gnu/lib/:/lib/:/usr/lib/ COLLECT_GCC_OPTIONS='-nostdinc' '-I' './arch/arm64/include' '-I' './arch/arm64/include/generated' '-I' './include' '-I' './include' '-I' './arch/arm64/include/uapi' '-I' './arch/arm64/include/generated/uapi' '-I' './include/uapi' '-I' './include/generated/uapi' '-include' './include/linux/compiler-version.h' '-include' './include/linux/kconfig.h' '-include' './include/linux/compiler_types.h' '-D' '__KERNEL__' '-mlittle-endian' '-D' 'KASAN_SHADOW_SCALE_SHIFT=' '-Werror' '-fshort-wchar' '-funsigned-char' '-fno-PIE' '-fno-strict-aliasing' '-std=gnu11' '-fms-extensions' '-mgeneral-regs-only' '-D' 'CONFIG_CC_HAS_K_CONSTRAINT=1' '-Wno-psabi' '-mabi=lp64' '-fno-unwind-tables' '-mbranch-protection=pac-ret' '-D' 'ARM64_ASM_ARCH="armv8.5-a"' '-D' 'KASAN_SHADOW_SCALE_SHIFT=' '-fno-delete-null-pointer-checks' '-O2' '-fno-allow-store-data-races' '-fstack-protector-strong' '-fno-omit-frame-pointer' '-fno-optimize-sibling-calls' '-ftrivial-auto-var-init=zero' '-fzero-init-padding-bits=all' '-fno-stack-clash-protection' '-fmin-function-alignment=4' '-fstrict-flex-arrays=3' '-fno-strict-overflow' '-fstack-check=no' '-fconserve-stack' '-fno-builtin-wcslen' '-Wall' '-Wextra' '-Wundef' '-Werror=implicit-function-declaration' '-Werror=implicit-int' '-Werror=return-type' '-Werror=strict-prototypes' '-Wno-format-security' '-Wno-trigraphs' '-Wno-frame-address' '-Wno-address-of-packed-member' '-Wframe-larger-than=2048' '-Wno-main' '-Wno-type-limits' '-Wdangling-pointer=0' '-Wvla-larger-than=1' '-Wno-pointer-sign' '-Wcast-function-type' '-Wno-unterminated-string-initialization' '-Warray-bounds=0' '-Wstringop-overflow=0' '-Walloc-size-larger-than=$XXX' '-Wimplicit-fallthrough=5' '-Werror=date-time' '-Werror=incompatible-pointer-types' '-Werror=designated-init' '-Wenum-conversion' '-Wunused' '-Wno-unused-but-set-variable' '-Wunused-const-variable=0' '-Wno-packed-not-aligned' '-Wformat-overflow=0' '-Wformat-truncation=0' '-Wno-stringop-truncation' '-Wno-override-init' '-Wno-missing-field-initializers' '-Wno-shift-negative-value' '-Wno-maybe-uninitialized' '-Wno-sign-compare' '-Wno-unused-parameter' '-g' '-fno-var-tracking' '-femit-struct-debug-baseonly' '-mstack-protector-guard=sysreg' '-mstack-protector-guard-reg=sp_el0' '-mstack-protector-guard-offset=1344' '-fno-common' '-fno-builtin' '-fno-stack-protector' '-ffixed-x18' '-D' 'DISABLE_BRANCH_PROFILING' '-D' 'BUILD_VDSO' '-O2' '-mcmodel=tiny' '-fasynchronous-unwind-tables' '-include' '/usr/local/google/home/briannorris/git/linux/lib/vdso/getrandom.c' '-D' 'KBUILD_MODFILE="arch/arm64/kernel/vdso/vgetrandom"' '-D' 'KBUILD_BASENAME="vgetrandom"' '-D' 'KBUILD_MODNAME="vgetrandom"' '-D' '__KBUILD_MODNAME=vgetrandom' '-c' '-o' 'arch/arm64/kernel/vdso/vgetrandom.o' '-v' '-dumpdir' 'arch/arm64/kernel/vdso/vgetrandom.' > Does the intermediate source or assembler source have any > ".cfi_section .sframe" statement? > > $ make arch/arm64/kernel/vdso/vgetrandom.i This fails to build with WERROR, because it seems to require the linker step that fails, so I have to disable WERROR. Afterward: $ grep -i sframe arch/arm64/kernel/vdso/vgetrandom.i // (empty) > $ make arch/arm64/kernel/vdso/vgetrandom.s This fails to build. $ make CROSS_COMPILE='ccache aarch64-linux-gnu-' ARCH=arm64 -j80 arch/arm64/kernel/vdso/vgetrandom.s CC arch/arm64/kernel/vdso/vgetrandom.s arch/arm64/kernel/vdso/vgetrandom.c:5:8: error: ‘__cvdso_getrandom’ undeclared here (not in a function) 5 | typeof(__cvdso_getrandom) __kernel_getrandom; | ^~~~~~~~~~~~~~~~~ arch/arm64/kernel/vdso/vgetrandom.c:7:1: error: unknown type name ‘ssize_t’ 7 | ssize_t __kernel_getrandom(void *buffer, size_t len, unsigned int flags, void *opaque_state, size_t opaque_len) | ^~~~~~~ arch/arm64/kernel/vdso/vgetrandom.c:7:42: error: unknown type name ‘size_t’ 7 | ssize_t __kernel_getrandom(void *buffer, size_t len, unsigned int flags, void *opaque_state, size_t opaque_len) | ^~~~~~ arch/arm64/kernel/vdso/vgetrandom.c:4:1: note: ‘size_t’ is defined in header ‘<stddef.h>’; this is probably fixable by adding ‘#include <stddef.h>’ 3 | #include <uapi/asm-generic/errno.h> +++ |+#include <stddef.h> 4 | arch/arm64/kernel/vdso/vgetrandom.c:7:94: error: unknown type name ‘size_t’ 7 | ssize_t __kernel_getrandom(void *buffer, size_t len, unsigned int flags, void *opaque_state, size_t opaque_len) | ^~~~~~ arch/arm64/kernel/vdso/vgetrandom.c:7:94: note: ‘size_t’ is defined in header ‘<stddef.h>’; this is probably fixable by adding ‘#include <stddef.h>’ make[4]: *** [scripts/Makefile.build:184: arch/arm64/kernel/vdso/vgetrandom.s] Error 1 make[3]: *** [scripts/Makefile.build:549: arch/arm64/kernel] Error 2 make[2]: *** [scripts/Makefile.build:549: arch/arm64] Error 2 > Can you please verify that your arch/arm64/kernel/vdso/vgetrandom.o > actually contains an .sframe section: > > $ readelf -WS arch/arm64/kernel/vdso/vgetrandom.o $ readelf -WS arch/arm64/kernel/vdso/vgetrandom.o | grep -i sframe [22] .sframe GNU_SFRAME 0000000000000000 002438 000083 00 A 0 0 8 [23] .rela.sframe RELA 0000000000000000 003988 000018 18 I 24 22 8 Brian
