[PATCH bpf-next v2 09/10] libbpf: Fix accessing syscall arguments on riscv

[Ilya Leoshkevich <iii@xxxxxxxxxxxxx>]

riscv's syscall handlers get "unpacked" arguments instead of a
struct pt_regs pointer. Indicate this to libbpf using PT_REGS_SYSCALL
macro.

Fixes: d084df3b7a4c ("libbpf: Fix the incorrect register read for syscalls on x86_64")
Reported-by: Heiko Carstens <hca@xxxxxxxxxxxxx>
Signed-off-by: Ilya Leoshkevich <iii@xxxxxxxxxxxxx>
---
 tools/lib/bpf/bpf_tracing.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/lib/bpf/bpf_tracing.h b/tools/lib/bpf/bpf_tracing.h
index c21aaecd711b..2b707aff0763 100644
--- a/tools/lib/bpf/bpf_tracing.h
+++ b/tools/lib/bpf/bpf_tracing.h
@@ -213,7 +213,8 @@
 #define __PT_FP_REG fp
 #define __PT_RC_REG a5
 #define __PT_SP_REG sp
-#define __PT_IP_REG epc
+#define __PT_IP_REG pc
+#define PT_REGS_SYSCALL(ctx) ctx
 
 #endif
 
-- 
2.34.1