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genksyms: restrict direct-declarator to take one parameter-type-list

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Similar to the previous commit, this change makes the parser logic a
little more accurate.

Currently, genksyms accepts the following invalid code:

    struct foo {
            int (*callback)(int)(int)(int);
    };

A direct-declarator should not recursively absorb multiple
( parameter-type-list ) constructs.

In the example above, (*callback) should be followed by at most one
(int).

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Acked-by: Nicolas Schier <n.schier@avm.de>
This commit is contained in:
Masahiro Yamada
2025-01-14 00:00:46 +09:00
parent c2f1846ba8
commit aa710cee0d
1 changed files with 8 additions and 4 deletions
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12
scripts/genksyms/parse.y
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@@ -331,12 +331,16 @@ nested_declarator:
;
direct_nested_declarator:
direct_nested_declarator1
| direct_nested_declarator1 '(' parameter_declaration_clause ')'
{ $$ = $4; }
;
direct_nested_declarator1:
IDENT { $$ = $1; dont_want_type_specifier = false; }
| direct_nested_declarator '(' parameter_declaration_clause ')'
| direct_nested_declarator1 '(' error ')'
{ $$ = $4; }
| direct_nested_declarator '(' error ')'
{ $$ = $4; }
| direct_nested_declarator BRACKET_PHRASE
| direct_nested_declarator1 BRACKET_PHRASE
{ $$ = $2; }
| '(' nested_declarator ')'
{ $$ = $3; }