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scripts: fix faddr2line to work on last symbol

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If faddr2line is given a function name which is the last one listed by
"nm -n", it will fail because it never finds the next symbol.

So teach the awk script to catch that possibility, and use 'size' to
provide the end point of the last function.

Signed-off-by: NeilBrown <neilb@suse.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
NeilBrown 2017-10-12 14:22:04 +11:00 committed by Linus Torvalds
parent 3206e7d5e2
commit 2aab9c3ca4
1 changed files with 3 additions and 2 deletions
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scripts/faddr2line
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@ -103,11 +103,12 @@ __faddr2line() {
# Go through each of the object's symbols which match the func name.
# In rare cases there might be duplicates.
file_end=$(size -Ax $objfile | awk '$1 == ".text" {print $2}')
while read symbol; do
local fields=($symbol)
local sym_base=0x${fields[0]}
local sym_type=${fields[1]}
local sym_end=0x${fields[3]}
local sym_end=${fields[3]}
# calculate the size
local sym_size=$(($sym_end - $sym_base))
@ -157,7 +158,7 @@ __faddr2line() {
addr2line -fpie $objfile $addr | sed "s; $dir_prefix\(\./\)*; ;"
DONE=1
done < <(nm -n $objfile | awk -v fn=$func '$3 == fn { found=1; line=$0; start=$1; next } found == 1 { found=0; print line, $1 }')
done < <(nm -n $objfile | awk -v fn=$func -v end=$file_end '$3 == fn { found=1; line=$0; start=$1; next } found == 1 { found=0; print line, "0x"$1 } END {if (found == 1) print line, end; }')
}
[[ $# -lt 2 ]] && usage