forked from ~ljy/RK356X_SDK_RELEASE
kernel/tools/perf/Documentation/perf-probe.txt
.. .. @@ -194,12 +194,13 @@ 194 194 -------------- 195 195 Each probe argument follows below syntax. 196 196 197 197 198 198 199 199 '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. $retval, %ax, etc). Note that the name of this argument will be set as the last member name if you specify a local data structure member (e.g. field2 for 'var->field1.field2'.) 200 200 '$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. 201 201 '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) 202 202 On x86 systems %REG is always the short form of the register: for example %AX. %RAX or %EAX is not valid. 203 203 204 204 205 TYPES 205 206 -----
