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kallsyms: expand symbol name into comment for debugging 

The assembler output of kallsyms.c is not meant for people to understand,
and is generally not helpful when debugging "Inconsistent kallsyms data"
warnings. I have previously struggled with these, but found it helpful
to list which symbols changed between the first and second pass in the
.tmp_vmlinux.kallsyms*.S files.

As this file is preprocessed, it's possible to add a C-style multiline
comment with the full type/name tuple.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
This commit is contained in:
Arnd Bergmann 2023-03-06 11:14:51 +01:00 committed by Masahiro Yamada
parent 6a8f57ae2e
commit bea5b74504
1 changed files with 2 additions and 1 deletions
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3
scripts/kallsyms.c
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@ -525,7 +525,8 @@ static void write_src(void)
table[i]->addr);
exit(EXIT_FAILURE);
}
printf("\t.long\t%#x\n", (int)offset);
expand_symbol(table[i]->sym, table[i]->len, buf);
printf("\t.long\t%#x /* %s */\n", (int)offset, buf);
} else if (!symbol_absolute(table[i])) {
output_address(table[i]->addr);
} else {