From: Ilya Leoshkevich <iii@linux.ibm.com>
To: Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Andrii Nakryiko <andrii.nakryiko@gmail.com>,
Heiko Carstens <hca@linux.ibm.com>,
Vasily Gorbik <gor@linux.ibm.com>,
Christian Borntraeger <borntraeger@linux.ibm.com>,
Alexander Gordeev <agordeev@linux.ibm.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Michael Ellerman <mpe@ellerman.id.au>,
Paul Walmsley <paul.walmsley@sifive.com>
Cc: bpf@vger.kernel.org, Ilya Leoshkevich <iii@linux.ibm.com>
Subject: [PATCH bpf-next v2 02/10] s390/bpf: Add orig_gpr2 to user_pt_regs
Date: Fri, 4 Feb 2022 05:19:47 +0100 [thread overview]
Message-ID: <20220204041955.1958263-3-iii@linux.ibm.com> (raw)
In-Reply-To: <20220204041955.1958263-1-iii@linux.ibm.com>
user_pt_regs is used by eBPF in order to access userspace registers -
see commit 466698e654e8 ("s390/bpf: correct broken uapi for
BPF_PROG_TYPE_PERF_EVENT program type"). In order to access the first
syscall argument from eBPF programs, we need to export orig_gpr2.
args member is not in use since commit 56e62a737028 ("s390: convert to
generic entry"), so move orig_gpr2 in its place.
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
---
arch/s390/include/asm/ptrace.h | 3 +--
arch/s390/include/uapi/asm/ptrace.h | 2 +-
2 files changed, 2 insertions(+), 3 deletions(-)
diff --git a/arch/s390/include/asm/ptrace.h b/arch/s390/include/asm/ptrace.h
index 4ffa8e7f0ed3..0278bacd61be 100644
--- a/arch/s390/include/asm/ptrace.h
+++ b/arch/s390/include/asm/ptrace.h
@@ -80,12 +80,11 @@ struct pt_regs {
union {
user_pt_regs user_regs;
struct {
- unsigned long args[1];
+ unsigned long orig_gpr2;
psw_t psw;
unsigned long gprs[NUM_GPRS];
};
};
- unsigned long orig_gpr2;
union {
struct {
unsigned int int_code;
diff --git a/arch/s390/include/uapi/asm/ptrace.h b/arch/s390/include/uapi/asm/ptrace.h
index ad64d673b5e6..d0cc737b8151 100644
--- a/arch/s390/include/uapi/asm/ptrace.h
+++ b/arch/s390/include/uapi/asm/ptrace.h
@@ -292,7 +292,7 @@ typedef struct {
* the in-kernel pt_regs structure to user space.
*/
typedef struct {
- unsigned long args[1];
+ unsigned long orig_gpr2;
psw_t psw;
unsigned long gprs[NUM_GPRS];
} user_pt_regs;
--
2.34.1
next prev parent reply other threads:[~2022-02-04 4:20 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-04 4:19 [PATCH bpf-next v2 00/10] libbpf: Fix accessing syscall arguments Ilya Leoshkevich
2022-02-04 4:19 ` [PATCH bpf-next v2 01/10] arm64/bpf: Add orig_x0 to user_pt_regs Ilya Leoshkevich
2022-02-04 4:19 ` Ilya Leoshkevich [this message]
2022-02-04 5:19 ` [PATCH bpf-next v2 02/10] s390/bpf: Add orig_gpr2 " Andrii Nakryiko
2022-02-04 10:09 ` Heiko Carstens
2022-02-04 4:19 ` [PATCH bpf-next v2 03/10] selftests/bpf: Fix an endianness issue in bpf_syscall_macro test Ilya Leoshkevich
2022-02-04 4:19 ` [PATCH bpf-next v2 04/10] libbpf: Add __PT_PARM1_REG_SYSCALL macro Ilya Leoshkevich
2022-02-04 4:19 ` [PATCH bpf-next v2 05/10] libbpf: Add PT_REGS_SYSCALL macro Ilya Leoshkevich
2022-02-04 5:22 ` Andrii Nakryiko
2022-02-04 5:23 ` Andrii Nakryiko
2022-02-04 12:29 ` Ilya Leoshkevich
2022-02-04 18:09 ` Andrii Nakryiko
2022-02-04 4:19 ` [PATCH bpf-next v2 06/10] selftests/bpf: Use PT_REGS_SYSCALL in bpf_syscall_macro Ilya Leoshkevich
2022-02-04 4:19 ` [PATCH bpf-next v2 07/10] libbpf: Fix accessing the first syscall argument on arm64 Ilya Leoshkevich
2022-02-04 4:19 ` [PATCH bpf-next v2 08/10] libbpf: Fix accessing syscall arguments on powerpc Ilya Leoshkevich
2022-02-04 4:19 ` [PATCH bpf-next v2 09/10] libbpf: Fix accessing syscall arguments on riscv Ilya Leoshkevich
2022-02-04 5:25 ` Andrii Nakryiko
2022-02-04 4:19 ` [PATCH bpf-next v2 10/10] libbpf: Fix accessing the first syscall argument on s390 Ilya Leoshkevich
2022-02-04 5:28 ` [PATCH bpf-next v2 00/10] libbpf: Fix accessing syscall arguments Andrii Nakryiko
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