From: Ilya Leoshkevich <iii@linux.ibm.com>
Date: Wed, 9 Feb 2022 03:17:41 +0100
Subject: libbpf: Fix accessing syscall arguments on riscv
Patch-mainline: v5.18-rc1
Git-commit: cf0b5b2769233b026cfa41206109dea77b0d17e3
References: jsc#PED-1377

riscv does not select ARCH_HAS_SYSCALL_WRAPPER, so its syscall
handlers take "unpacked" syscall arguments. Indicate this to libbpf
using PT_REGS_SYSCALL_REGS macro.

Reported-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20220209021745.2215452-7-iii@linux.ibm.com
Acked-by: Shung-Hsi Yu <shung-hsi.yu@suse.com>
---
 tools/lib/bpf/bpf_tracing.h |    2 ++
 1 file changed, 2 insertions(+)

--- a/tools/lib/bpf/bpf_tracing.h
+++ b/tools/lib/bpf/bpf_tracing.h
@@ -214,6 +214,8 @@
 #define __PT_RC_REG a5
 #define __PT_SP_REG sp
 #define __PT_IP_REG pc
+/* riscv does not select ARCH_HAS_SYSCALL_WRAPPER. */
+#define PT_REGS_SYSCALL_REGS(ctx) ctx
 
 #endif