A longstanding issue with genksyms is that it has hidden syntax errors.
When a syntax error occurs, yyerror() is called. However,
error_with_pos() is a no-op unless the -w option is provided.
You can observe syntax errors by manually passing the -w option.
For example, with CONFIG_MODVERSIONS=y on v6.13-rc1:
$ make -s KCFLAGS=-D__GENKSYMS__ drivers/acpi/prmt.i
$ cat drivers/acpi/prmt.i | scripts/genksyms/genksyms -w
[ snip ]
drivers/acpi/prmt.c:56: syntax error
The syntax error occurs in the following code in drivers/acpi/prmt.c:
struct prm_handler_info {
[ snip ]
efi_status_t (__efiapi *handler_addr)(u64, void *);
[ snip ]
};
The issue arises from __efiapi, which is defined as either
__attribute__((ms_abi)) or __attribute__((regparm(0))).
This commit allows nested_declarator to be prefixed with attributes.
Signed-off-by: Masahiro Yamada <masahiroy@xxxxxxxxxx>
---
scripts/genksyms/parse.y | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/scripts/genksyms/parse.y b/scripts/genksyms/parse.y
index 54e16c2e0b4b..49d3e536b9a8 100644
--- a/scripts/genksyms/parse.y
+++ b/scripts/genksyms/parse.y
@@ -345,8 +345,8 @@ direct_nested_declarator1:
{ $$ = $4; }
| direct_nested_declarator1 BRACKET_PHRASE
{ $$ = $2; }
- | '(' nested_declarator ')'
- { $$ = $3; }
+ | '(' attribute_opt nested_declarator ')'
+ { $$ = $4; }
| '(' error ')'
{ $$ = $3; }
;
--
2.43.0
