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| author |  Andrii Nakryiko <andrii@kernel.org>
| 2023-01-20 12:09:06 -0800 |
|---|---|---|
| committer |  Daniel Borkmann <daniel@iogearbox.net>
| 2023-01-23 20:53:01 +0100 |
| commit | 3488ea0584bb3888e2fcbe2d2ff738ff173d91ab (patch) | |
| tree | e7720f4f99a7d5515aef066b2ca3f18b2211c183 /tools/lib | |
| parent | libbpf: Define arm syscall regs spec in bpf_tracing.h (diff) | |
| download | linux-3488ea0584bb3888e2fcbe2d2ff738ff173d91ab.tar.gz linux-3488ea0584bb3888e2fcbe2d2ff738ff173d91ab.tar.bz2 linux-3488ea0584bb3888e2fcbe2d2ff738ff173d91ab.zip | |
libbpf: Define arm64 syscall regs spec in bpf_tracing.h
Define explicit table of registers used for syscall argument passing.
We need PT_REGS_PARM1_[CORE_]SYSCALL macros overrides, similarly to
s390x, due to orig_x0 not being present in UAPI's pt_regs, so we need to
utilize BPF CO-RE and custom pt_regs___arm64 definition.
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Tested-by: Alan Maguire <alan.maguire@oracle.com> # arm64
Link: https://lore.kernel.org/bpf/20230120200914.3008030-18-andrii@kernel.org
Diffstat (limited to 'tools/lib')
| -rw-r--r-- | tools/lib/bpf/bpf_tracing.h | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/tools/lib/bpf/bpf_tracing.h b/tools/lib/bpf/bpf_tracing.h index edd85a0ab612..f753346e9be6 100644 --- a/tools/lib/bpf/bpf_tracing.h +++ b/tools/lib/bpf/bpf_tracing.h @@ -233,13 +233,22 @@ struct pt_regs___arm64 { #define __PT_PARM6_REG regs[5] #define __PT_PARM7_REG regs[6] #define __PT_PARM8_REG regs[7] + +#define __PT_PARM1_SYSCALL_REG orig_x0 +#define __PT_PARM2_SYSCALL_REG __PT_PARM2_REG +#define __PT_PARM3_SYSCALL_REG __PT_PARM3_REG +#define __PT_PARM4_SYSCALL_REG __PT_PARM4_REG +#define __PT_PARM5_SYSCALL_REG __PT_PARM5_REG +#define __PT_PARM6_SYSCALL_REG __PT_PARM6_REG +#define PT_REGS_PARM1_SYSCALL(x) PT_REGS_PARM1_CORE_SYSCALL(x) +#define PT_REGS_PARM1_CORE_SYSCALL(x) \ + BPF_CORE_READ((const struct pt_regs___arm64 *)(x), __PT_PARM1_SYSCALL_REG) + #define __PT_RET_REG regs[30] #define __PT_FP_REG regs[29] /* Works only with CONFIG_FRAME_POINTER */ #define __PT_RC_REG regs[0] #define __PT_SP_REG sp #define __PT_IP_REG pc -#define PT_REGS_PARM1_SYSCALL(x) PT_REGS_PARM1_CORE_SYSCALL(x) -#define PT_REGS_PARM1_CORE_SYSCALL(x) BPF_CORE_READ((const struct pt_regs___arm64 *)(x), orig_x0) #elif defined(bpf_target_mips) |