[gcc r12-3397] btf: expose get_btf_id

[gcc r12-3397] btf: expose get_btf_id

[David Faust]

https://gcc.gnu.org/g:0a2bd52f1a903060a7b305b429aa71fb68995bb7

commit r12-3397-g0a2bd52f1a903060a7b305b429aa71fb68995bb7
Author: David Faust <david.faust@oracle.com>
Date:   Tue Aug 3 10:04:10 2021 -0700

    btf: expose get_btf_id
    
    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
    
    gcc/ChangeLog:
    
            * btfout.c (get_btf_id): Function is no longer static.
            * ctfc.h: Expose it here.

Diff:
---
 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
+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.  */