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author | Florian Weimer <fweimer@redhat.com> | 2022-11-03 17:28:03 +0100 |
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committer | Florian Weimer <fweimer@redhat.com> | 2022-11-03 17:28:03 +0100 |
commit | 1f34a2328890aa192141f96449d25b77f666bf47 (patch) | |
tree | 283ca2a4b46cf069da45f40663e779003064bcdc /sysdeps/generic/dl-call_tls_init_tp.h | |
parent | fb6ee7ba8122330ac819556a42cc56db07d9da76 (diff) | |
download | glibc-1f34a2328890aa192141f96449d25b77f666bf47.tar.gz glibc-1f34a2328890aa192141f96449d25b77f666bf47.tar.xz glibc-1f34a2328890aa192141f96449d25b77f666bf47.zip |
elf: Introduce <dl-call_tls_init_tp.h> and call_tls_init_tp (bug 29249)
This makes it more likely that the compiler can compute the strlen argument in _startup_fatal at compile time, which is required to avoid a dependency on strlen this early during process startup. Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com>
Diffstat (limited to 'sysdeps/generic/dl-call_tls_init_tp.h')
-rw-r--r-- | sysdeps/generic/dl-call_tls_init_tp.h | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/sysdeps/generic/dl-call_tls_init_tp.h b/sysdeps/generic/dl-call_tls_init_tp.h new file mode 100644 index 0000000000..411feda3fc --- /dev/null +++ b/sysdeps/generic/dl-call_tls_init_tp.h @@ -0,0 +1,34 @@ +/* Invoke TLS_INIT_TP and __tls_init_tp with error handling. + Copyright (C) 2022 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <https://www.gnu.org/licenses/>. */ + +#include <startup.h> +#include <tls.h> + +static inline void +_startup_fatal_tls_error (void) +{ + _startup_fatal ("Fatal glibc error: Cannot allocate TLS block\n"); +} + +static inline void +call_tls_init_tp (void *addr) +{ + if (!TLS_INIT_TP (addr)) + _startup_fatal_tls_error (); + __tls_init_tp (); +} |