Merge branch 'libbpf/selftests syscall wrapper fixes for RISC-V'

Björn Töpel says:

====================
From: Björn Töpel <bjorn@rivosinc.com>

Commit 08d0ce3 ("riscv: Implement syscall wrappers") introduced
some regressions in libbpf, and the kselftests BPF suite, which are
fixed with these three patches.

Note that there's an outstanding fix [1] for ftrace syscall tracing
which is also a fallout from the commit above.

Björn

[1] https://lore.kernel.org/linux-riscv/20231003182407.32198-1-alexghiti@rivosinc.com/

Alexandre Ghiti (1):
  libbpf: Fix syscall access arguments on riscv
====================

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>

Author: anakryiko

tools/lib/bpf/bpf_tracing.h

@@ -362,8 +362,6 @@ struct pt_regs___arm64 {
 #define __PT_PARM7_REG a6
 #define __PT_PARM8_REG a7
 
-/* riscv does not select ARCH_HAS_SYSCALL_WRAPPER. */
-#define PT_REGS_SYSCALL_REGS(ctx) ctx
 #define __PT_PARM1_SYSCALL_REG __PT_PARM1_REG
 #define __PT_PARM2_SYSCALL_REG __PT_PARM2_REG
 #define __PT_PARM3_SYSCALL_REG __PT_PARM3_REG

tools/testing/selftests/bpf/progs/bpf_misc.h

@@ -99,6 +99,9 @@
 #elif defined(__TARGET_ARCH_arm64)
 #define SYSCALL_WRAPPER 1
 #define SYS_PREFIX "__arm64_"
+#elif defined(__TARGET_ARCH_riscv)
+#define SYSCALL_WRAPPER 1
+#define SYS_PREFIX "__riscv_"
 #else
 #define SYSCALL_WRAPPER 0
 #define SYS_PREFIX "__se_"

tools/testing/selftests/bpf/test_progs.h

@@ -417,6 +417,8 @@ int get_bpf_max_tramp_links(void);
 #define SYS_NANOSLEEP_KPROBE_NAME "__s390x_sys_nanosleep"
 #elif defined(__aarch64__)
 #define SYS_NANOSLEEP_KPROBE_NAME "__arm64_sys_nanosleep"
+#elif defined(__riscv)
+#define SYS_NANOSLEEP_KPROBE_NAME "__riscv_sys_nanosleep"
 #else
 #define SYS_NANOSLEEP_KPROBE_NAME "sys_nanosleep"
 #endif