The branch stable/13 has been updated by kib:
URL:
https://cgit.FreeBSD.org/src/commit/?id=13e0ef823047491f8c246dd721ec22778c4d5384
commit 13e0ef823047491f8c246dd721ec22778c4d5384
Author: Konstantin Belousov <k...@freebsd.org>
AuthorDate: 2021-04-11 08:12:48 +0000
Commit: Konstantin Belousov <k...@freebsd.org>
CommitDate: 2021-04-23 11:14:08 +0000
rtld_lock.h: add some comments about versioning of struct RtldLockInfo
(cherry picked from commit 9b33518ada2ebda727ca3c7979cdcdb30716f737)
---
libexec/rtld-elf/rtld_lock.h | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/libexec/rtld-elf/rtld_lock.h b/libexec/rtld-elf/rtld_lock.h
index fdbdc9917075..c88b558b72b8 100644
--- a/libexec/rtld-elf/rtld_lock.h
+++ b/libexec/rtld-elf/rtld_lock.h
@@ -35,9 +35,20 @@
#define MAX_RTLD_LOCKS 8
+/*
+ * This structure is part of the ABI between rtld and threading
+ * libraries, like libthr and even libc_r. Its layout is fixed and
+ * can be changed only by appending new fields at the end, with the
+ * bump of RTLI_VERSION.
+ */
struct RtldLockInfo
{
+ /*
+ * Valid if the object calling _rtld_thread_init() exported
+ * symbol _pli_rtli_version. Otherwise assume RTLI_VERSION_ONE.
+ */
unsigned int rtli_version;
+
void *(*lock_create)(void);
void (*lock_destroy)(void *);
void (*rlock_acquire)(void *);
@@ -46,6 +57,8 @@ struct RtldLockInfo
int (*thread_set_flag)(int);
int (*thread_clr_flag)(int);
void (*at_fork)(void);
+
+ /* Version 2 fields */
char *(*dlerror_loc)(void);
int *(*dlerror_seen)(void);
int dlerror_loc_sz;
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