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objtool, kcsan: Add explicit check functions to uaccess whitelist

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Add explicitly invoked KCSAN check functions to objtool's uaccess
whitelist. This is needed in order to permit calling into
kcsan_check_scoped_accesses() from the fast-path, which in turn calls
__kcsan_check_access().  __kcsan_check_access() is the generic variant
of the already whitelisted specializations __tsan_{read,write}N.

Signed-off-by: Marco Elver <elver@google.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Marco Elver 2020-03-25 17:41:57 +01:00 committed by Paul E. McKenney
parent 757a4cefde
commit 9967683ce5
1 changed files with 2 additions and 0 deletions
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tools/objtool/check.c
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@ -468,8 +468,10 @@ static const char *uaccess_safe_builtin[] = {
"__asan_report_store8_noabort",
"__asan_report_store16_noabort",
/* KCSAN */
"__kcsan_check_access",
"kcsan_found_watchpoint",
"kcsan_setup_watchpoint",
"kcsan_check_scoped_accesses",
/* KCSAN/TSAN */
"__tsan_func_entry",
"__tsan_func_exit",