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libbpf: Fix accessing syscall arguments on riscv

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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
This commit is contained in:
Ilya Leoshkevich
2022-02-09 03:17:41 +01:00
committed by Andrii Nakryiko
parent 497ec1d35c
commit 32c19d8505
1 changed files with 2 additions and 0 deletions
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2
src/bpf_tracing.h
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@@ -214,6 +214,8 @@
#define __PT_RC_REG a5 #define __PT_RC_REG a5
#define __PT_SP_REG sp #define __PT_SP_REG sp
#define __PT_IP_REG pc #define __PT_IP_REG pc
/* riscv does not select ARCH_HAS_SYSCALL_WRAPPER. */
#define PT_REGS_SYSCALL_REGS(ctx) ctx
#endif #endif