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scripts/faddr2line: Combine three readelf calls into one

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Rather than calling readelf three separate times to collect three different
types of info, call it only once, and parse out the different types of info
from its output.

Signed-off-by: Brian Johannesmeyer <bjohannesmeyer@gmail.com>
Link: https://lore.kernel.org/r/20240415145538.1938745-3-bjohannesmeyer@gmail.com
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
This commit is contained in:
Brian Johannesmeyer 2024-04-15 16:55:33 +02:00 committed by Josh Poimboeuf
parent 39cf650d68
commit b8d9d9496c
1 changed files with 7 additions and 3 deletions
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scripts/faddr2line
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@ -105,10 +105,14 @@ find_dir_prefix() {
run_readelf() {
local objfile=$1
local out=$(${READELF} --file-header --section-headers --symbols --wide $objfile)
ELF_FILEHEADER=$(${READELF} --file-header $objfile)
ELF_SECHEADERS=$(${READELF} --section-headers --wide $objfile)
ELF_SYMS=$(${READELF} --symbols --wide $objfile)
# This assumes that readelf first prints the file header, then the section headers, then the symbols.
# Note: It seems that GNU readelf does not prefix section headers with the "There are X section headers"
# line when multiple options are given, so let's also match with the "Section Headers:" line.
ELF_FILEHEADER=$(echo "${out}" | sed -n '/There are [0-9]* section headers, starting at offset\|Section Headers:/q;p')
ELF_SECHEADERS=$(echo "${out}" | sed -n '/There are [0-9]* section headers, starting at offset\|Section Headers:/,$p' | sed -n '/Symbol table .* contains [0-9]* entries:/q;p')
ELF_SYMS=$(echo "${out}" | sed -n '/Symbol table .* contains [0-9]* entries:/,$p')
}
__faddr2line() {