18c2ecf20Sopenharmony_ci#!/bin/sh 28c2ecf20Sopenharmony_ci# SPDX-License-Identifier: GPL-2.0 38c2ecf20Sopenharmony_ci# description: Kprobe events - probe points 48c2ecf20Sopenharmony_ci# requires: kprobe_events 58c2ecf20Sopenharmony_ci 68c2ecf20Sopenharmony_ciTARGET_FUNC=tracefs_create_dir 78c2ecf20Sopenharmony_ci 88c2ecf20Sopenharmony_cidec_addr() { # hexaddr 98c2ecf20Sopenharmony_ci printf "%d" "0x"`echo $1 | tail -c 8` 108c2ecf20Sopenharmony_ci} 118c2ecf20Sopenharmony_ci 128c2ecf20Sopenharmony_ciset_offs() { # prev target next 138c2ecf20Sopenharmony_ci A1=`dec_addr $1` 148c2ecf20Sopenharmony_ci A2=`dec_addr $2` 158c2ecf20Sopenharmony_ci A3=`dec_addr $3` 168c2ecf20Sopenharmony_ci TARGET="0x$2" # an address 178c2ecf20Sopenharmony_ci PREV=`expr $A1 - $A2` # offset to previous symbol 188c2ecf20Sopenharmony_ci NEXT=+`expr $A3 - $A2` # offset to next symbol 198c2ecf20Sopenharmony_ci OVERFLOW=+`printf "0x%x" ${PREV}` # overflow offset to previous symbol 208c2ecf20Sopenharmony_ci} 218c2ecf20Sopenharmony_ci 228c2ecf20Sopenharmony_ci# We have to decode symbol addresses to get correct offsets. 238c2ecf20Sopenharmony_ci# If the offset is not an instruction boundary, it cause -EILSEQ. 248c2ecf20Sopenharmony_ciset_offs `grep -A1 -B1 ${TARGET_FUNC} /proc/kallsyms | cut -f 1 -d " " | xargs` 258c2ecf20Sopenharmony_ci 268c2ecf20Sopenharmony_ciUINT_TEST=no 278c2ecf20Sopenharmony_ci# printf "%x" -1 returns (unsigned long)-1. 288c2ecf20Sopenharmony_ciif [ `printf "%x" -1 | wc -c` != 9 ]; then 298c2ecf20Sopenharmony_ci UINT_TEST=yes 308c2ecf20Sopenharmony_cifi 318c2ecf20Sopenharmony_ci 328c2ecf20Sopenharmony_ciecho "p:testprobe ${TARGET_FUNC}" > kprobe_events 338c2ecf20Sopenharmony_ciecho "p:testprobe ${TARGET}" > kprobe_events 348c2ecf20Sopenharmony_ciecho "p:testprobe ${TARGET_FUNC}${NEXT}" > kprobe_events 358c2ecf20Sopenharmony_ci! echo "p:testprobe ${TARGET_FUNC}${PREV}" > kprobe_events 368c2ecf20Sopenharmony_ciif [ "${UINT_TEST}" = yes ]; then 378c2ecf20Sopenharmony_ci! echo "p:testprobe ${TARGET_FUNC}${OVERFLOW}" > kprobe_events 388c2ecf20Sopenharmony_cifi 39