Dne 11.8.2016 v 12:16 Nicholas Piggin napsal(a): > Add an option for architectures to pass over modules after they are > linked. powerpc will use this to check linker relocations for sanity, > and possibly to fix up alternate instruction patch relocations. > > Signed-off-by: Nicholas Piggin <npiggin@xxxxxxxxx> > --- > Since v1, > - Switched to a more flexible arch makefile invocation. > - Provide a powerpc patch to use it to help existing build issue > (rather than only justification being out-of-tree patch). > > Documentation/kbuild/makefiles.txt | 10 ++++++++++ > arch/Kconfig | 7 +++++++ > scripts/Makefile.modpost | 3 +++ > scripts/link-vmlinux.sh | 4 ++++ > 4 files changed, 24 insertions(+) > > diff --git a/Documentation/kbuild/makefiles.txt b/Documentation/kbuild/makefiles.txt > index 385a5ef..8581e38 100644 > --- a/Documentation/kbuild/makefiles.txt > +++ b/Documentation/kbuild/makefiles.txt > @@ -41,6 +41,7 @@ This document describes the Linux kernel Makefiles. > --- 6.8 Custom kbuild commands > --- 6.9 Preprocessing linker scripts > --- 6.10 Generic header files > + --- 6.11 Post-link pass > > === 7 Kbuild syntax for exported headers > --- 7.1 header-y > @@ -1237,6 +1238,15 @@ When kbuild executes, the following steps are followed (roughly): > to list the file in the Kbuild file. > See "7.4 generic-y" for further info on syntax etc. > > +--- 6.11 Post-link pass > + > + CONFIG_BUILD_ARCH_POSTLINK can be selected in order to have > + arch/?/Makefile.postlink invoked on vmlinux and module.ko > + files after final link. > + > + For example, powerpc uses this to check relocations on the > + linked vmlinux file. > + > === 7 Kbuild syntax for exported headers > > The kernel includes a set of headers that is exported to userspace. > diff --git a/arch/Kconfig b/arch/Kconfig > index fc3f9e1..3a36ea8 100644 > --- a/arch/Kconfig > +++ b/arch/Kconfig > @@ -461,6 +461,13 @@ config CC_STACKPROTECTOR_STRONG > > endchoice > > +config BUILD_ARCH_POSTLINK > + bool > + help > + Select this if the architecture wants to have a Makefile invoked > + on modules and vmlinux after they are linked. The architecture > + must provide arch/?/Makefile.postlink > + > config THIN_ARCHIVES > bool > help > diff --git a/scripts/Makefile.modpost b/scripts/Makefile.modpost > index 1366a94..1acaa20 100644 > --- a/scripts/Makefile.modpost > +++ b/scripts/Makefile.modpost > @@ -123,6 +123,9 @@ quiet_cmd_ld_ko_o = LD [M] $@ > > $(modules): %.ko :%.o %.mod.o FORCE > $(call if_changed,ld_ko_o) > +ifdef CONFIG_BUILD_ARCH_POSTLINK > + $(Q)$(MAKE) -f $(srctree)/arch/$(SRCARCH)/Makefile.postlink $@ > +endif Why not simply branch off the existence of arch/*/Makefile.postlink and drop the kconfig option? Thanks, Michal -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
