redonkable/alistair23-linux
redonkable/alistair23-linux
1
0
Fork 0
Code Releases Activity

libbpf: Fix use of PT_REGS_PARM macros with vmlinux.h

Browse source 
Add detection of vmlinux.h to bpf_tracing.h header for PT_REGS macro.
Currently, BPF applications have to define __KERNEL__ symbol to use correct
definition of struct pt_regs on x86 arch. This is due to different field names
under internal kernel vs UAPI conditions. To make this more transparent for
users, detect vmlinux.h by checking __VMLINUX_H__ symbol.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200229231112.1240137-3-andriin@fb.com
This commit is contained in:
Andrii Nakryiko 2020-02-29 15:11:10 -08:00 committed by Alexei Starovoitov
parent ca7dc2791b
commit fd56e00584
1 changed files with 1 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
tools/lib/bpf/bpf_tracing.h
View file

@ -49,7 +49,7 @@
#if defined(bpf_target_x86)
#ifdef __KERNEL__
#if defined(__KERNEL__) || defined(__VMLINUX_H__)
#define PT_REGS_PARM1(x) ((x)->di)
#define PT_REGS_PARM2(x) ((x)->si)
#define PT_REGS_PARM3(x) ((x)->dx)