[Linux-kernel-mentees] [PATCH v2 09/25] parsing_c: parser: Handle struct/union/enum end attributes
Jaskaran Singh
jaskaransingh7654321 at gmail.com
Thu May 28 12:24:11 UTC 2020
As per GCC's C grammar, the struct-or-union-specifier and enum-specifier
have the following productions:
struct-or-union-specifier:
struct-or-union attribute-specifier-sequence[opt] gnu-attributes[opt]
identifier[opt] { struct-contents } gnu-attributes[opt]
enum-specifier:
enum gnu-attributes[opt] identifier[opt] { enumerator-list }
gnu-attributes[opt]
enum gnu-attributes[opt] identifier[opt] { enumerator-list , }
gnu-attributes[opt]
Add a production to the decl2 rule of Coccinelle's C parser to handle
the end attributes here (i.e. gnu-attributes after the } ). This parses
the following C code from Linux v5.6-rc7:
drivers/net/wireless/broadcom/b43legacy/b43legacy.h
struct b43legacy_iv {
__be16 offset_size;
union {
__be16 d16;
__be32 d32;
} data __packed;
} __packed;
drivers/scsi/myrs.h:
enum myrs_cmd_opcode {
MYRS_CMD_OP_MEMCOPY = 0x01,
MYRS_CMD_OP_SCSI_10_PASSTHRU = 0x02,
MYRS_CMD_OP_SCSI_255_PASSTHRU = 0x03,
MYRS_CMD_OP_SCSI_10 = 0x04,
MYRS_CMD_OP_SCSI_256 = 0x05,
MYRS_CMD_OP_IOCTL = 0x20,
} __packed;
Signed-off-by: Jaskaran Singh <jaskaransingh7654321 at gmail.com>
---
parsing_c/parser_c.mly | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/parsing_c/parser_c.mly b/parsing_c/parser_c.mly
index b795f3a0..684ee63e 100644
--- a/parsing_c/parser_c.mly
+++ b/parsing_c/parser_c.mly
@@ -1553,6 +1553,17 @@ decl2:
},[]],
($2::iistart::snd storage))
}
+ | decl_spec end_attributes TPtVirg
+ { function local ->
+ let (returnType,storage) = fixDeclSpecForDecl (snd $1) in
+ let iistart = Ast_c.fakeInfo () in
+ DeclList ([{v_namei = None; v_type = returnType;
+ v_storage = unwrap storage; v_local = local;
+ v_attr = fst $1; v_endattr = $2;
+ v_type_bis = ref None;
+ },[]],
+ ($3::iistart::snd storage))
+ }
| decl_spec init_declarator_list TPtVirg
{ function local ->
let (returnType,storage) = fixDeclSpecForDecl (snd $1) in
--
2.21.1
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