On Mon, Mar 4, 2019 at 12:50 PM Adrian Ratiu <adrian.ratiu@xxxxxxxxxxxxx> wrote: > > eBPF "restricted C" code can be compiled with LLVM/clang using target > triplets like armv7l-unknown-linux-gnueabihf and loaded/run with small > cross-compiled gobpf/elf [1] programs without requiring a full BCC > port which is also undesirable on small embedded systems due to its > size footprint. The only missing pieces are these helper macros which > otherwise have to be redefined by each eBPF arm program. > > [1] https://github.com/iovisor/gobpf/tree/master/elf > > Signed-off-by: Adrian Ratiu <adrian.ratiu@xxxxxxxxxxxxx> I think this is for bpf-next tree, which is closed during the merge window. Please resubmit when the bpf-next trees is opened (usually in 2 weeks). Thanks, Song > --- > tools/testing/selftests/bpf/bpf_helpers.h | 18 ++++++++++++++++++ > 1 file changed, 18 insertions(+) > > diff --git a/tools/testing/selftests/bpf/bpf_helpers.h b/tools/testing/selftests/bpf/bpf_helpers.h > index 6c77cf7bedce..f7883576f445 100644 > --- a/tools/testing/selftests/bpf/bpf_helpers.h > +++ b/tools/testing/selftests/bpf/bpf_helpers.h > @@ -232,6 +232,9 @@ static int (*bpf_skb_pull_data)(void *, int len) = > #elif defined(__TARGET_ARCH_s930x) > #define bpf_target_s930x > #define bpf_target_defined > +#elif defined(__TARGET_ARCH_arm) > + #define bpf_target_arm > + #define bpf_target_defined > #elif defined(__TARGET_ARCH_arm64) > #define bpf_target_arm64 > #define bpf_target_defined > @@ -254,6 +257,8 @@ static int (*bpf_skb_pull_data)(void *, int len) = > #define bpf_target_x86 > #elif defined(__s390x__) > #define bpf_target_s930x > +#elif defined(__arm__) > + #define bpf_target_arm > #elif defined(__aarch64__) > #define bpf_target_arm64 > #elif defined(__mips__) > @@ -291,6 +296,19 @@ static int (*bpf_skb_pull_data)(void *, int len) = > #define PT_REGS_SP(x) ((x)->gprs[15]) > #define PT_REGS_IP(x) ((x)->psw.addr) > > +#elif defined(bpf_target_arm) > + > +#define PT_REGS_PARM1(x) ((x)->uregs[0]) > +#define PT_REGS_PARM2(x) ((x)->uregs[1]) > +#define PT_REGS_PARM3(x) ((x)->uregs[2]) > +#define PT_REGS_PARM4(x) ((x)->uregs[3]) > +#define PT_REGS_PARM5(x) ((x)->uregs[4]) > +#define PT_REGS_RET(x) ((x)->uregs[14]) > +#define PT_REGS_FP(x) ((x)->uregs[11]) /* Works only with CONFIG_FRAME_POINTER */ > +#define PT_REGS_RC(x) ((x)->uregs[0]) > +#define PT_REGS_SP(x) ((x)->uregs[13]) > +#define PT_REGS_IP(x) ((x)->uregs[12]) > + > #elif defined(bpf_target_arm64) > > #define PT_REGS_PARM1(x) ((x)->regs[0]) > -- > 2.20.1 >
