[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH 1/4] xen: build infrastructure for generating hypercall depending symbols
On 11/12/14 18:04, Juergen Gross wrote: > Today there are several places in the kernel which build tables > containing one entry for each possible Xen hypercall. Create an > infrastructure to be able to generate these tables at build time. Does arm and arm64 need something similar? If so are the tools here suitable for them? > --- a/arch/x86/syscalls/Makefile > +++ b/arch/x86/syscalls/Makefile Why are these changes here and not in arch/x86/xen/Makefile? > @@ -19,6 +19,9 @@ quiet_cmd_syshdr = SYSHDR $@ > quiet_cmd_systbl = SYSTBL $@ > cmd_systbl = $(CONFIG_SHELL) '$(systbl)' $< $@ > > +quiet_cmd_hypercalls = HYPERCALLS $@ > + cmd_hypercalls = $(CONFIG_SHELL) '$<' $@ $(filter-out $<,$^) > + > syshdr_abi_unistd_32 := i386 > $(uapi)/unistd_32.h: $(syscall32) $(syshdr) > $(call if_changed,syshdr) > @@ -47,10 +50,16 @@ $(out)/syscalls_32.h: $(syscall32) $(systbl) > $(out)/syscalls_64.h: $(syscall64) $(systbl) > $(call if_changed,systbl) > > +$(out)/xen-hypercalls.h: $(srctree)/scripts/xen-hypercalls.sh > + $(call if_changed,hypercalls) > + > +$(out)/xen-hypercalls.h: $(srctree)/include/xen/interface/xen*.h The generated header should end up in asm/xen/ > --- /dev/null > +++ b/scripts/xen-hypercalls.sh > @@ -0,0 +1,11 @@ > +#!/bin/sh > +out="$1" > +shift > +in="$@" > + > +for i in $in; do > + eval $CPP $LINUXINCLUDE -dD -imacros "$i" -x c /dev/null > +done | \ > +awk '$1 == "#define" && $2 ~ /__HYPERVISOR_[a-z][a-z_0-9]*/ { v[$3] = $2 } > + END {for (i in v) if (!(v[i] in v)) > + print "HYPERCALL("substr(v[i], 14)")"}' | sort -u >$out Include a comment in the generated output saying what generated it. e.g., /* auto-generated by scripts/xen-hypercall.sh */ David _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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