Commit 7221b9ca authored by Andrii Nakryiko's avatar Andrii Nakryiko Committed by Alexei Starovoitov
Browse files

libbpf: Fix powerpc's stack register definition in bpf_tracing.h 

retsnoop's build on powerpc (ppc64le) architecture ([0]) failed due to
wrong definition of PT_REGS_SP() macro. Looking at powerpc's
implementation of stack unwinding in perf_callchain_user_64() clearly
shows that stack pointer register is gpr[1].

Fix libbpf's definition of __PT_SP_REG for powerpc to fix all this.

  [0] https://kojipkgs.fedoraproject.org/work/tasks/1544/137921544/build.log



Fixes: 138d6153 ("samples/bpf: Enable powerpc support")
Signed-off-by: default avatarAndrii Nakryiko <andrii@kernel.org>
Reviewed-by: default avatarNaveen N Rao (AMD) <naveen@kernel.org>
Link: https://lore.kernel.org/r/20251020203643.989467-1-andrii@kernel.org


Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent 881a9c9c

tools/lib/bpf/bpf_tracing.h

+1 −1
Original line number Diff line number Diff line
@@ -311,7 +311,7 @@ struct pt_regs___arm64 { 
#define __PT_RET_REG regs[31]

#define __PT_FP_REG __unsupported__

#define __PT_RC_REG gpr[3]

#define __PT_SP_REG sp

#define __PT_SP_REG gpr[1]

#define __PT_IP_REG nip



#elif defined(bpf_target_sparc)