glibc/elf/Versions
Adhemerval Zanella a4c3f5f46e elf: Add a way to check if tunable is set (BZ 27069)
The patch adds two new macros, TUNABLE_GET_DEFAULT and TUNABLE_IS_INITIALIZED,
here the former get the default value with a signature similar to
TUNABLE_GET, while the later returns whether the tunable was set by
the environment variable.

Checked on x86_64-linux-gnu.
Reviewed-by: DJ Delorie <dj@redhat.com>
Tested-by: Zhangfei Gao <zhangfei.gao@linaro.org>
2023-11-29 09:30:00 -03:00

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libc {
GLIBC_2.0 {
%ifdef EXPORT_UNWIND_FIND_FDE
__deregister_frame_info; __register_frame_info;
%endif
}
GLIBC_2.1 {
# functions used in other libraries
_dl_mcount_wrapper; _dl_mcount_wrapper_check;
}
GLIBC_2.2.4 {
dl_iterate_phdr;
}
%ifdef EXPORT_UNWIND_FIND_FDE
# Needed for SHLIB_COMPAT calls using this version.
GLIBC_2.2.5 {
}
GCC_3.0 {
__deregister_frame_info_bases; __register_frame_info_bases;
__register_frame_info_table_bases; _Unwind_Find_FDE;
}
%endif
GLIBC_2.35 {
_dl_find_object;
}
GLIBC_ABI_DT_RELR {
# This symbol is used only for empty version map and will be removed
# by scripts/versions.awk.
__placeholder_only_for_empty_version_map;
}
GLIBC_PRIVATE {
# functions used in other libraries
__libc_early_init;
}
}
ld {
GLIBC_2.0 {
_r_debug;
}
GLIBC_2.1 {
# functions used in other libraries
_dl_mcount;
# historically used by Garbage Collectors
__libc_stack_end;
}
GLIBC_2.3 {
# runtime interface to TLS
__tls_get_addr;
}
GLIBC_2.4 {
# stack canary
__stack_chk_guard;
}
GLIBC_2.34 {
__rtld_version_placeholder;
}
GLIBC_PRIVATE {
# Those are in the dynamic linker, but used by libc.so.
__libc_enable_secure;
_dl_allocate_tls; _dl_allocate_tls_init;
_dl_argv; _dl_find_dso_for_object; _dl_get_tls_static_info;
_dl_deallocate_tls; _dl_make_stack_executable;
_dl_rtld_di_serinfo; _dl_starting_up; _dl_fatal_printf;
_dl_audit_symbind_alt; _dl_audit_preinit;
_rtld_global; _rtld_global_ro;
# Only here for gdb while a better method is developed.
_dl_debug_state;
# Pointer protection.
__pointer_chk_guard;
# Internal error handling support.
_dl_exception_create; _dl_exception_create_format; _dl_exception_free;
_dl_signal_exception; _dl_catch_exception;
_dl_signal_error;
# Set value of a tunable.
__tunable_is_initialized;
__tunable_get_val;
}
}