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| author | Paolo Bonzini | 2019-08-09 16:53:39 +0200 |
|---|---|---|
| committer | Paolo Bonzini | 2019-08-09 16:53:39 +0200 |
| commit | 0e1c438c44dd9cde56effb44c5f1cfeda72e108d (patch) | |
| tree | fa3492d4d7d8b7444e5d8ebe6c78210826333e4b /tools/perf/Documentation/perf-probe.txt | |
| parent | selftests: kvm: Adding config fragments (diff) | |
| parent | arm64: KVM: hyp: debug-sr: Mark expected switch fall-through (diff) | |
| download | kernel-qcow2-linux-0e1c438c44dd9cde56effb44c5f1cfeda72e108d.tar.gz kernel-qcow2-linux-0e1c438c44dd9cde56effb44c5f1cfeda72e108d.tar.xz kernel-qcow2-linux-0e1c438c44dd9cde56effb44c5f1cfeda72e108d.zip | |
Merge tag 'kvmarm-fixes-for-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD
KVM/arm fixes for 5.3
- A bunch of switch/case fall-through annotation, fixing one actual bug
- Fix PMU reset bug
- Add missing exception class debug strings
Diffstat (limited to 'tools/perf/Documentation/perf-probe.txt')
| -rw-r--r-- | tools/perf/Documentation/perf-probe.txt | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/tools/perf/Documentation/perf-probe.txt b/tools/perf/Documentation/perf-probe.txt index b6866a05edd2..ed3ecfa422e1 100644 --- a/tools/perf/Documentation/perf-probe.txt +++ b/tools/perf/Documentation/perf-probe.txt @@ -194,12 +194,13 @@ PROBE ARGUMENT -------------- Each probe argument follows below syntax. - [NAME=]LOCALVAR|$retval|%REG|@SYMBOL[:TYPE] + [NAME=]LOCALVAR|$retval|%REG|@SYMBOL[:TYPE][@user] 'NAME' specifies the name of this argument (optional). You can use the name of local variable, local data structure member (e.g. var->field, var.field2), local array with fixed index (e.g. array[1], var->array[0], var->pointer[2]), or kprobe-tracer argument format (e.g. $retval, %ax, etc). Note that the name of this argument will be set as the last member name if you specify a local data structure member (e.g. field2 for 'var->field1.field2'.) '$vars' and '$params' special arguments are also available for NAME, '$vars' is expanded to the local variables (including function parameters) which can access at given probe point. '$params' is expanded to only the function parameters. 'TYPE' casts the type of this argument (optional). If omitted, perf probe automatically set the type based on debuginfo (*). Currently, basic types (u8/u16/u32/u64/s8/s16/s32/s64), hexadecimal integers (x/x8/x16/x32/x64), signedness casting (u/s), "string" and bitfield are supported. (see TYPES for detail) On x86 systems %REG is always the short form of the register: for example %AX. %RAX or %EAX is not valid. +"@user" is a special attribute which means the LOCALVAR will be treated as a user-space memory. This is only valid for kprobe event. TYPES ----- |