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| author | Gabriel Laskar <gabriel@lse.epita.fr> | 2015-12-04 01:07:33 +0100 |
|---|---|---|
| committer | Dmitry V. Levin <ldv@altlinux.org> | 2015-12-04 18:05:38 +0000 |
| commit | 8b6046a052255fe71fac200f0f7b3b76419dc16d (patch) | |
| tree | 9b3862e1f41fd42088b6bd85e12ce997cadfff3f /defs.h | |
| parent | 5421855219bd066a1ecc42b3d3357929a6f1b0c5 (diff) | |
| download | strace-8b6046a052255fe71fac200f0f7b3b76419dc16d.tar.gz | |
ioctl: allow to stop decoding number
For some ioctls, like from drm, the identification of the correct ioctl
is done by custom code. Specifying IOCTL_NUMBER_STOP_LOOKUP on
return of ioctl_decode_command_number() disables further calls to
ioctl_lookup().
* defs.h (IOCTL_NUMBER_UNKNOWN, IOCTL_NUMBER_HANDLED,
IOCTL_NUMBER_STOP_LOOKUP): Add macros representing ioctl number state
decoding.
* ioctl.c (SYS_FUNC(ioctl)): Skip ioctl_lookup() when
ioctl_decode_command_number() returns a value with
IOCTL_NUMBER_STOP_LOOKUP flag is set.
Suggested-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Signed-off-by: Gabriel Laskar <gabriel@lse.epita.fr>
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
Diffstat (limited to 'defs.h')
| -rw-r--r-- | defs.h | 4 |
1 files changed, 4 insertions, 0 deletions
@@ -450,6 +450,10 @@ extern const struct xlat whence_codes[]; #define STACKTRACE_CAPTURE_ON_ENTER 01000 /* Capture stacktrace on "entering" stage */ #define TRACE_INDIRECT_SUBCALL 02000 /* Syscall is an indirect socket/ipc subcall. */ +#define IOCTL_NUMBER_UNKNOWN 0 +#define IOCTL_NUMBER_HANDLED 1 +#define IOCTL_NUMBER_STOP_LOOKUP 010 + #define indirect_ipccall(tcp) (tcp->s_ent->sys_flags & TRACE_INDIRECT_SUBCALL) #if defined(ARM) || defined(AARCH64) \ |