[PATCH v2 5/6] arm64: audit: Add makefile rule to create unistd_32.h for compat syscalls

generic compat sycall audit (lib/compat_audit.c) requires unistd_32.h for __NR_xyx compat syscall numbers. This is a different file from unistd32.h on arm64 and so it must be generated from unistd32.h. Signed-off-by: AKASHI Takahiro <takahiro.akashi(a)linaro.org&gt; --- arch/arm64/Makefile | 4 ++++ arch/arm64/kernel/syscalls/Makefile | 20 ++++++++++++++++++++ 2 files changed, 24 insertions(+) create mode 100644 arch/arm64/kernel/syscalls/Makefile diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile index 2fceb71..6d24f92 100644 --- a/arch/arm64/Makefile +++ b/arch/arm64/Makefile @@ -72,6 +72,10 @@ PHONY += vdso_install vdso_install: $(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso $@ +# Compat syscall header generation +archheaders: + $(Q)$(MAKE) $(build)=arch/arm64/kernel/syscalls $@ + # We use MRPROPER_FILES and CLEAN_FILES now archclean: $(Q)$(MAKE) $(clean)=$(boot) diff --git a/arch/arm64/kernel/syscalls/Makefile b/arch/arm64/kernel/syscalls/Makefile new file mode 100644 index 0000000..7661113 --- /dev/null +++ b/arch/arm64/kernel/syscalls/Makefile @@ -0,0 +1,20 @@ +out := $(obj)/../../include/generated/asm + +# Create output directory if not already present +_dummy := $(shell [ -d '$(out)' ] || mkdir -p '$(out)') + +syshdr-$(CONFIG_COMPAT) += unistd_32.h + +targets += $(syshdr-y) + +quiet_cmd_syshdr = SYSHDR $@ + cmd_syshdr = cat $< | sed -r \ + -e 's/compat_//' \ + -e 's/_wrapper//' \ + -e 's/^__SYSCALL\((.*),[ ]*sys_([^)].*)\).*/\#define __NR_\2 \1/p;d' \ + | grep -v __NR_ni_syscall > $@ + +archheaders: $(addprefix $(out)/,$(syshdr-y)) + +$(out)/unistd_32.h: $(src)/../../include/asm/unistd32.h + $(call if_changed,syshdr) -- 1.7.9.5