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samples/seccomp: fix dependencies on arch macros

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This change fixes the compilation error reported for
i386 allmodconfig here:
  http://kisskb.ellerman.id.au/kisskb/buildresult/6123842/

Logic attempting to predict the host architecture has been
removed from the Makefile.  Instead, the bpf-direct sample
should now compile on any architecture, but if the architecture
is not supported, it will compile a minimal main() function.

This change also ensures the samples are not compiled when
there is no seccomp filter support.

Reported-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Suggested-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Will Drewry <wad@chromium.org>
Signed-off-by: Kevin F. Haggerty <haggertk@lineageos.org>
This commit is contained in:
Will Drewry 2012-04-18 17:53:16 -05:00 committed by Francescodario Cuzzocrea
parent 5c73a62c08
commit 0631dcbb0a
2 changed files with 3 additions and 11 deletions
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12
samples/seccomp/Makefile
View file

@ -1,27 +1,21 @@
# kbuild trick to avoid linker error. Can be omitted if a module is built. # kbuild trick to avoid linker error. Can be omitted if a module is built.
obj- := dummy.o obj- := dummy.o
hostprogs-$(CONFIG_SECCOMP) := bpf-fancy dropper hostprogs-$(CONFIG_SECCOMP_FILTER) := bpf-fancy dropper bpf-direct
bpf-fancy-objs := bpf-fancy.o bpf-helper.o
HOSTCFLAGS_bpf-fancy.o += -I$(objtree)/usr/include HOSTCFLAGS_bpf-fancy.o += -I$(objtree)/usr/include
HOSTCFLAGS_bpf-fancy.o += -idirafter $(objtree)/include HOSTCFLAGS_bpf-fancy.o += -idirafter $(objtree)/include
HOSTCFLAGS_bpf-helper.o += -I$(objtree)/usr/include HOSTCFLAGS_bpf-helper.o += -I$(objtree)/usr/include
HOSTCFLAGS_bpf-helper.o += -idirafter $(objtree)/include HOSTCFLAGS_bpf-helper.o += -idirafter $(objtree)/include
bpf-fancy-objs := bpf-fancy.o bpf-helper.o
HOSTCFLAGS_dropper.o += -I$(objtree)/usr/include HOSTCFLAGS_dropper.o += -I$(objtree)/usr/include
HOSTCFLAGS_dropper.o += -idirafter $(objtree)/include HOSTCFLAGS_dropper.o += -idirafter $(objtree)/include
dropper-objs := dropper.o dropper-objs := dropper.o
# bpf-direct.c is x86-only.
ifeq ($(SRCARCH),x86)
# List of programs to build
hostprogs-$(CONFIG_SECCOMP) += bpf-direct
bpf-direct-objs := bpf-direct.o
endif
HOSTCFLAGS_bpf-direct.o += -I$(objtree)/usr/include HOSTCFLAGS_bpf-direct.o += -I$(objtree)/usr/include
HOSTCFLAGS_bpf-direct.o += -idirafter $(objtree)/include HOSTCFLAGS_bpf-direct.o += -idirafter $(objtree)/include
bpf-direct-objs := bpf-direct.o
# Try to match the kernel target. # Try to match the kernel target.
ifeq ($(CONFIG_64BIT),) ifeq ($(CONFIG_64BIT),)

2
samples/seccomp/bpf-direct.c
View file

@ -48,8 +48,6 @@
#define REG_ARG3 REG_R10 #define REG_ARG3 REG_R10
#define REG_ARG4 REG_R8 #define REG_ARG4 REG_R8
#define REG_ARG5 REG_R9 #define REG_ARG5 REG_R9
#else
#error Unsupported platform
#endif #endif
#ifndef PR_SET_NO_NEW_PRIVS #ifndef PR_SET_NO_NEW_PRIVS