Subject: Re: [PATCH v2 3/4] perf augmented_raw_syscalls: Support arm64 raw syscalls

From: Arnaldo Carvalho de Melo <[email-masked]>
Date: Thu, 6 Jun 2019 10:38:38 -0300

Em Thu, Jun 06, 2019 at 05:48:44PM +0800, Leo Yan escreveu:
> This patch adds support for arm64 raw syscall numbers so that we can use
> it on arm64 platform.
> 
> After applied this patch, we need to specify macro -D__aarch64__ or
> -D__x86_64__ in compilation option so Clang can use the corresponding
> syscall numbers for arm64 or x86_64 respectively, other architectures
> will report failure when compilation.

So, please check what I have in my perf/core branch, I've completely
removed arch specific stuff from augmented_raw_syscalls.c.

What is done now is use a map to specify what to copy, that same map
that is used to state which syscalls should be traced.

It uses that tools/perf/arch/arm64/entry/syscalls/mksyscalltbl to figure
out the mapping of syscall names to ids, just like is done for x86_64
and other arches, falling back to audit-libs when that syscalltbl thing
is not present.

- Arnaldo
 
> Signed-off-by: Leo Yan <[email-masked]>
> ---
>  .../examples/bpf/augmented_raw_syscalls.c     | 81 +++++++++++++++++++
>  1 file changed, 81 insertions(+)
> 
> diff --git a/tools/perf/examples/bpf/augmented_raw_syscalls.c b/tools/perf/examples/bpf/augmented_raw_syscalls.c
> index 5c4a4e715ae6..a3701a4daf2e 100644
> --- a/tools/perf/examples/bpf/augmented_raw_syscalls.c
> +++ b/tools/perf/examples/bpf/augmented_raw_syscalls.c
> @@ -45,6 +45,83 @@ struct augmented_filename {
>  	char		value[PATH_MAX];
>  };
>  
> +#if defined(__aarch64__)
> +
> +/* syscalls where the first arg is a string */
> +#define SYS_OPEN               1024
> +#define SYS_STAT               1038
> +#define SYS_LSTAT              1039
> +#define SYS_ACCESS             1033
> +#define SYS_EXECVE              221
> +#define SYS_TRUNCATE             45
> +#define SYS_CHDIR                49
> +#define SYS_RENAME             1034
> +#define SYS_MKDIR              1030
> +#define SYS_RMDIR              1031
> +#define SYS_CREAT              1064
> +#define SYS_LINK               1025
> +#define SYS_UNLINK             1026
> +#define SYS_SYMLINK            1036
> +#define SYS_READLINK           1035
> +#define SYS_CHMOD              1028
> +#define SYS_CHOWN              1029
> +#define SYS_LCHOWN             1032
> +#define SYS_MKNOD              1027
> +#define SYS_STATFS             1056
> +#define SYS_PIVOT_ROOT           41
> +#define SYS_CHROOT               51
> +#define SYS_ACCT                 89
> +#define SYS_SWAPON              224
> +#define SYS_SWAPOFF             225
> +#define SYS_DELETE_MODULE       106
> +#define SYS_SETXATTR              5
> +#define SYS_LSETXATTR             6
> +#define SYS_GETXATTR              8
> +#define SYS_LGETXATTR             9
> +#define SYS_LISTXATTR            11
> +#define SYS_LLISTXATTR           12
> +#define SYS_REMOVEXATTR          14
> +#define SYS_LREMOVEXATTR         15
> +#define SYS_MQ_OPEN             180
> +#define SYS_MQ_UNLINK           181
> +#define SYS_ADD_KEY             217
> +#define SYS_REQUEST_KEY         218
> +#define SYS_SYMLINKAT            36
> +#define SYS_MEMFD_CREATE        279
> +
> +/* syscalls where the second arg is a string */
> +#define SYS_PWRITE64             68
> +#define SYS_RENAME             1034
> +#define SYS_QUOTACTL             60
> +#define SYS_FSETXATTR             7
> +#define SYS_FGETXATTR            10
> +#define SYS_FREMOVEXATTR         16
> +#define SYS_MQ_TIMEDSEND        182
> +#define SYS_REQUEST_KEY         218
> +#define SYS_INOTIFY_ADD_WATCH    27
> +#define SYS_OPENAT               56
> +#define SYS_MKDIRAT              34
> +#define SYS_MKNODAT              33
> +#define SYS_FCHOWNAT             54
> +#define SYS_FUTIMESAT          1066
> +#define SYS_NEWFSTATAT         1054
> +#define SYS_UNLINKAT             35
> +#define SYS_RENAMEAT             38
> +#define SYS_LINKAT               37
> +#define SYS_READLINKAT           78
> +#define SYS_FCHMODAT             53
> +#define SYS_FACCESSAT            48
> +#define SYS_UTIMENSAT            88
> +#define SYS_NAME_TO_HANDLE_AT   264
> +#define SYS_FINIT_MODULE        273
> +#define SYS_RENAMEAT2           276
> +#define SYS_EXECVEAT            281
> +#define SYS_STATX               291
> +#define SYS_MOVE_MOUNT          429
> +#define SYS_FSPICK              433
> +
> +#elif defined(__x86_64__)
> +
>  /* syscalls where the first arg is a string */
>  #define SYS_OPEN                 2
>  #define SYS_STAT                 4
> @@ -119,6 +196,10 @@ struct augmented_filename {
>  #define SYS_MOVE_MOUNT         429
>  #define SYS_FSPICK             433
>  
> +#else
> +#error "unsupported architecture"
> +#endif
> +
>  pid_filter(pids_filtered);
>  
>  struct augmented_args_filename {
> -- 
> 2.17.1

-- 

- Arnaldo