Messages in this thread | | | From | Andreas Schwab <> | Subject | Re: [PATCH v3] riscv: explicitly use symbol offsets for VDSO | Date | Wed, 27 Oct 2021 16:50:33 +0200 |
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On Aug 04 2021, Saleem Abdulrasool wrote:
> The current implementation of the `__rt_sigaction` reference computed an > absolute offset relative to the mapped base of the VDSO. While this can > be handled in the medlow model, the medany model cannot handle this as > it is meant to be position independent. The current implementation > relied on the BFD linker relaxing the PC-relative relocation into an > absolute relocation as it was a near-zero address allowing it to be > referenced relative to `zero`. > > We now extract the offsets and create a generated header allowing the > build with LLVM and lld to succeed as we no longer depend on the linker > rewriting address references near zero. This change was largely > modelled after the ARM64 target which does something similar. > > Signed-off-by: Saleem Abdulrasool <abdulras@google.com>
I think this broke out-of-tree module builds.
https://build.opensuse.org/package/live_build_log/openSUSE:Factory:RISCV/rtl8812au/standard/riscv64
+ make -j4 make ARCH=riscv CROSS_COMPILE= -C /usr/src/linux-obj/riscv64/default M=/home/abuild/rpmbuild/BUILD/rtl8812au-5.9.3.2+git20210427.6ef5d8f/obj/default modules make[1]: Entering directory '/usr/src/linux-5.14.14-1-obj/riscv64/default' mkdir: cannot create directory 'arch/riscv/kernel': Permission denied LDS arch/riscv/kernel/vdso/vdso.lds AS arch/riscv/kernel/vdso/rt_sigreturn.o CC arch/riscv/kernel/vdso/vgettimeofday.o AS arch/riscv/kernel/vdso/getcpu.o mkdir: cannot create directory 'arch/riscv/kernel': Permission denied LDS arch/riscv/kernel/vdso/vdso.lds AS arch/riscv/kernel/vdso/rt_sigreturn.o CC arch/riscv/kernel/vdso/vgettimeofday.o AS arch/riscv/kernel/vdso/getcpu.o cc1: fatal error: opening output file arch/riscv/kernel/vdso/vdso.lds: No such file or directory compilation terminated. make[3]: *** [/usr/src/linux-5.14.14-1/scripts/Makefile.build:366: arch/riscv/kernel/vdso/vdso.lds] Error 1
Andreas.
-- Andreas Schwab, schwab@linux-m68k.org GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC1 "And now for something completely different."
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