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| author |  Andrii Nakryiko <andrii@kernel.org>
| 2023-01-20 12:09:02 -0800 |
|---|---|---|
| committer |  Daniel Borkmann <daniel@iogearbox.net>
| 2023-01-23 20:53:00 +0100 |
| commit | d21fbceedd90ccc11775ca583889d21d3b66d88d (patch) | |
| tree | 59b4cd594ac4dd2429d8cab64596359f645f1ccc /tools/lib | |
| parent | libbpf: Improve syscall tracing support in bpf_tracing.h (diff) | |
| download | linux-d21fbceedd90ccc11775ca583889d21d3b66d88d.tar.gz linux-d21fbceedd90ccc11775ca583889d21d3b66d88d.tar.bz2 linux-d21fbceedd90ccc11775ca583889d21d3b66d88d.zip | |
libbpf: Define x86-64 syscall regs spec in bpf_tracing.h
Define explicit table of registers used for syscall argument passing.
Remove now unnecessary overrides of PT_REGS_PARM5_[CORE_]SYSCALL macros.
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20230120200914.3008030-14-andrii@kernel.org
Diffstat (limited to 'tools/lib')
| -rw-r--r-- | tools/lib/bpf/bpf_tracing.h | 25 |
1 files changed, 19 insertions, 6 deletions
diff --git a/tools/lib/bpf/bpf_tracing.h b/tools/lib/bpf/bpf_tracing.h index e3bf510e1e55..5fd498821c29 100644 --- a/tools/lib/bpf/bpf_tracing.h +++ b/tools/lib/bpf/bpf_tracing.h @@ -90,14 +90,22 @@ #define __PT_PARM4_REG cx #define __PT_PARM5_REG r8 #define __PT_PARM6_REG r9 +/* + * Syscall uses r10 for PARM4. See arch/x86/entry/entry_64.S:entry_SYSCALL_64 + * comments in Linux sources. And refer to syscall(2) manpage. + */ +#define __PT_PARM1_SYSCALL_REG __PT_PARM1_REG +#define __PT_PARM2_SYSCALL_REG __PT_PARM2_REG +#define __PT_PARM3_SYSCALL_REG __PT_PARM3_REG +#define __PT_PARM4_SYSCALL_REG r10 +#define __PT_PARM5_SYSCALL_REG __PT_PARM5_REG +#define __PT_PARM6_SYSCALL_REG __PT_PARM6_REG + #define __PT_RET_REG sp #define __PT_FP_REG bp #define __PT_RC_REG ax #define __PT_SP_REG sp #define __PT_IP_REG ip -/* syscall uses r10 for PARM4 */ -#define PT_REGS_PARM4_SYSCALL(x) ((x)->r10) -#define PT_REGS_PARM4_CORE_SYSCALL(x) BPF_CORE_READ(x, r10) #else @@ -121,14 +129,19 @@ #define __PT_PARM4_REG rcx #define __PT_PARM5_REG r8 #define __PT_PARM6_REG r9 + +#define __PT_PARM1_SYSCALL_REG __PT_PARM1_REG +#define __PT_PARM2_SYSCALL_REG __PT_PARM2_REG +#define __PT_PARM3_SYSCALL_REG __PT_PARM3_REG +#define __PT_PARM4_SYSCALL_REG r10 +#define __PT_PARM5_SYSCALL_REG __PT_PARM5_REG +#define __PT_PARM6_SYSCALL_REG __PT_PARM6_REG + #define __PT_RET_REG rsp #define __PT_FP_REG rbp #define __PT_RC_REG rax #define __PT_SP_REG rsp #define __PT_IP_REG rip -/* syscall uses r10 for PARM4 */ -#define PT_REGS_PARM4_SYSCALL(x) ((x)->r10) -#define PT_REGS_PARM4_CORE_SYSCALL(x) BPF_CORE_READ(x, r10) #endif /* __i386__ */ |