linux-kernel - Re: [RESEND Patch V2 1/4] xen: build infrastructure for generating hypercall depending symbols

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <54DD8C92.7050201@suse.com>
Date:	Fri, 13 Feb 2015 06:33:06 +0100
From:	Juergen Gross <jgross@...e.com>
To:	x86@...nel.org, tglx@...utronix.de, mingo@...hat.com, hpa@...or.com
CC:	linux-kernel@...r.kernel.org, xen-devel@...ts.xensource.com,
	konrad.wilk@...cle.com, david.vrabel@...rix.com,
	boris.ostrovsky@...cle.com, mmarek@...e.cz,
	linux-kbuild@...r.kernel.org
Subject: Re: [RESEND Patch V2 1/4] xen: build infrastructure for generating
 hypercall depending symbols

  ######   ###  #     #   #####
  #     #   #   ##    #  #     #
  #     #   #   # #   #  #
  ######    #   #  #  #  #  ####
  #         #   #   # #  #     #
  #         #   #    ##  #     #
  #        ###  #     #   #####

David still wants a comment from the x86 maintainers...

Juergen

On 01/21/2015 08:49 AM, 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.
>
> Based-on-patch-by: Jan Beulich <jbeulich@...e.com>
> Signed-off-by: Juergen Gross <jgross@...e.com>
> Reviewed-by: David Vrabel <david.vrabel@...rix.com>
> ---
>   arch/x86/syscalls/Makefile |  9 +++++++++
>   scripts/xen-hypercalls.sh  | 12 ++++++++++++
>   2 files changed, 21 insertions(+)
>   create mode 100644 scripts/xen-hypercalls.sh
>
> diff --git a/arch/x86/syscalls/Makefile b/arch/x86/syscalls/Makefile
> index 3323c27..a55abb9 100644
> --- a/arch/x86/syscalls/Makefile
> +++ b/arch/x86/syscalls/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: $(srctree)/include/xen/interface/xen*.h
> +
>   uapisyshdr-y			+= unistd_32.h unistd_64.h unistd_x32.h
>   syshdr-y			+= syscalls_32.h
>   syshdr-$(CONFIG_X86_64)		+= unistd_32_ia32.h unistd_64_x32.h
>   syshdr-$(CONFIG_X86_64)		+= syscalls_64.h
> +syshdr-$(CONFIG_XEN)		+= xen-hypercalls.h
>
>   targets	+= $(uapisyshdr-y) $(syshdr-y)
>
> diff --git a/scripts/xen-hypercalls.sh b/scripts/xen-hypercalls.sh
> new file mode 100644
> index 0000000..676d922
> --- /dev/null
> +++ b/scripts/xen-hypercalls.sh
> @@ -0,0 +1,12 @@
> +#!/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] = $2 }
> +	END {   print "/* auto-generated by scripts/xen-hypercall.sh */"
> +		for (i in v) if (!(v[i] in v))
> +			print "HYPERCALL("substr(v[i], 14)")"}' | sort -u >$out
>

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/