From: H. Nikolaus Schaller hns@goldelico.com
[ Upstream commit fa953adfad7cf9c7e30d9ea0e4ccfd38cfb5495d ]
Trying to run a cross-compiled x86 relocs tool on a BSD based HOSTCC leads to errors like
VOFFSET arch/x86/boot/compressed/../voffset.h - due to: vmlinux CC arch/x86/boot/compressed/misc.o - due to: arch/x86/boot/compressed/../voffset.h OBJCOPY arch/x86/boot/compressed/vmlinux.bin - due to: vmlinux RELOCS arch/x86/boot/compressed/vmlinux.relocs - due to: vmlinux empty (sub)expressionarch/x86/boot/compressed/Makefile:118: recipe for target 'arch/x86/boot/compressed/vmlinux.relocs' failed make[3]: *** [arch/x86/boot/compressed/vmlinux.relocs] Error 1
It turns out that relocs.c uses patterns like
"something(|_end)"
This is not valid syntax or gives undefined results according to POSIX 9.5.3 ERE Grammar
https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap09.html
It seems to be silently accepted by the Linux regexp() implementation while a BSD host complains.
Such patterns can be replaced by a transformation like
"(|p1|p2)" -> "(p1|p2)?"
Fixes: fd952815307f ("x86-32, relocs: Whitelist more symbols for ld bug workaround") Signed-off-by: H. Nikolaus Schaller hns@goldelico.com Signed-off-by: Masahiro Yamada masahiroy@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- arch/x86/tools/relocs.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/arch/x86/tools/relocs.c b/arch/x86/tools/relocs.c index 04c5a44b9682..9ba700dc47de 100644 --- a/arch/x86/tools/relocs.c +++ b/arch/x86/tools/relocs.c @@ -57,12 +57,12 @@ static const char * const sym_regex_kernel[S_NSYMTYPES] = { [S_REL] = "^(__init_(begin|end)|" "__x86_cpu_dev_(start|end)|" - "(__parainstructions|__alt_instructions)(|_end)|" - "(__iommu_table|__apicdrivers|__smp_locks)(|_end)|" + "(__parainstructions|__alt_instructions)(_end)?|" + "(__iommu_table|__apicdrivers|__smp_locks)(_end)?|" "__(start|end)_pci_.*|" "__(start|end)_builtin_fw|" - "__(start|stop)___ksymtab(|_gpl)|" - "__(start|stop)___kcrctab(|_gpl)|" + "__(start|stop)___ksymtab(_gpl)?|" + "__(start|stop)___kcrctab(_gpl)?|" "__(start|stop)___param|" "__(start|stop)___modver|" "__(start|stop)___bug_table|"