mirror of
https://github.com/torvalds/linux.git
synced 2024-12-27 05:11:48 +00:00
6f1a6ae87c
When building the kernel with a bare-metal (ELF) toolchain, the -shared option may not be passed down to collect2, resulting in silent corruption of the vDSO image (in particular, the DYNAMIC section is omitted). The effect of this corruption is that the dynamic linker fails to find the vDSO symbols and libc is instead used for the syscalls that we intended to optimise (e.g. gettimeofday). Functionally, there is no issue as the sigreturn trampoline is still intact and located by the kernel. This patch fixes the problem by explicitly passing -shared to the linker when building the vDSO. Cc: <stable@vger.kernel.org> Reported-by: Szabolcs Nagy <Szabolcs.Nagy@arm.com> Reported-by: James Greenlaigh <james.greenhalgh@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> |
||
|---|---|---|
| .. | ||
| .gitignore | ||
| gen_vdso_offsets.sh | ||
| gettimeofday.S | ||
| Makefile | ||
| note.S | ||
| sigreturn.S | ||
| vdso.lds.S | ||
| vdso.S | ||