[PATCH 4/7] btf: expose get_btf_id

David Faust david.faust@oracle.com
Wed Aug 4 17:54:08 GMT 2021

Expose the function get_btf_id, so that it may be used by the BPF
backend. This enables the BPF CO-RE machinery in the BPF backend to
lookup BTF type IDs, in order to create CO-RE relocation records.

A prototype is added in ctfc.h


	* btfout.c (get_btf_id): Function is no longer static.
	* ctfc.h: Expose it here.
 gcc/btfout.c | 2 +-
 gcc/ctfc.h   | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/gcc/btfout.c b/gcc/btfout.c
index 8cdd9905fb6..cdc6c6378c0 100644
--- a/gcc/btfout.c
+++ b/gcc/btfout.c
@@ -156,7 +156,7 @@ init_btf_id_map (size_t len)
 /* Return the BTF type ID of CTF type ID KEY, or BTF_INVALID_TYPEID if the CTF
    type with ID KEY does not map to a BTF type.  */
-static inline ctf_id_t
 get_btf_id (ctf_id_t key)
   return btf_id_map[key];
diff --git a/gcc/ctfc.h b/gcc/ctfc.h
index 14180c1e5de..a0b7e4105a8 100644
--- a/gcc/ctfc.h
+++ b/gcc/ctfc.h
@@ -431,6 +431,7 @@ extern int ctf_add_variable (ctf_container_ref, const char *, ctf_id_t,
 			     dw_die_ref, unsigned int);
 extern ctf_id_t ctf_lookup_tree_type (ctf_container_ref, const tree);
+extern ctf_id_t get_btf_id (ctf_id_t);
 /* CTF section does not emit location information; at this time, location
    information is needed for BTF CO-RE use-cases.  */

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