threeeye
bc1d038eac
Squashed backup commit (no shallow-clone history issues) of xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2 branch, upstream commit 9eece662e) plus all fixes applied to get everpal_defconfig building clean against a modern (GCC 15.2.0) toolchain -- see the previous commit message on the lineage-23.2 branch (also in this repo history is not available here since this is a squashed snapshot; full incremental history lives in the local DL380 checkout and the upstream GitHub remote). Upstream: https://github.com/xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2)
44 lines
1.2 KiB
Bash
44 lines
1.2 KiB
Bash
#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0
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# description: Kprobe events - probe points
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[ -f kprobe_events ] || exit_unsupported # this is configurable
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TARGET_FUNC=create_trace_kprobe
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dec_addr() { # hexaddr
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printf "%d" "0x"`echo $1 | tail -c 8`
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}
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set_offs() { # prev target next
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A1=`dec_addr $1`
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A2=`dec_addr $2`
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A3=`dec_addr $3`
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TARGET="0x$2" # an address
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PREV=`expr $A1 - $A2` # offset to previous symbol
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NEXT=+`expr $A3 - $A2` # offset to next symbol
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OVERFLOW=+`printf "0x%x" ${PREV}` # overflow offset to previous symbol
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}
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# We have to decode symbol addresses to get correct offsets.
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# If the offset is not an instruction boundary, it cause -EILSEQ.
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set_offs `grep -A1 -B1 ${TARGET_FUNC} /proc/kallsyms | cut -f 1 -d " " | xargs`
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UINT_TEST=no
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# printf "%x" -1 returns (unsigned long)-1.
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if [ `printf "%x" -1 | wc -c` != 9 ]; then
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UINT_TEST=yes
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fi
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echo 0 > events/enable
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echo > kprobe_events
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echo "p:testprobe ${TARGET_FUNC}" > kprobe_events
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echo "p:testprobe ${TARGET}" > kprobe_events
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echo "p:testprobe ${TARGET_FUNC}${NEXT}" > kprobe_events
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! echo "p:testprobe ${TARGET_FUNC}${PREV}" > kprobe_events
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if [ "${UINT_TEST}" = yes ]; then
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! echo "p:testprobe ${TARGET_FUNC}${OVERFLOW}" > kprobe_events
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fi
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echo > kprobe_events
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clear_trace
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