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70 lines
2.0 KiB
C
70 lines
2.0 KiB
C
/* Support for GNU properties. AArch64 version.
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Copyright (C) 2018-2023 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#ifndef _DL_PROP_H
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#define _DL_PROP_H
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extern void _dl_bti_protect (struct link_map *, int) attribute_hidden;
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extern void _dl_bti_check (struct link_map *, const char *)
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attribute_hidden;
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static inline void __attribute__ ((always_inline))
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_rtld_main_check (struct link_map *m, const char *program)
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{
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_dl_bti_check (m, program);
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}
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static inline void __attribute__ ((always_inline))
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_dl_open_check (struct link_map *m)
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{
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_dl_bti_check (m, NULL);
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}
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static inline void __attribute__ ((always_inline))
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_dl_process_pt_note (struct link_map *l, int fd, const ElfW(Phdr) *ph)
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{
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}
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static inline int
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_dl_process_gnu_property (struct link_map *l, int fd, uint32_t type,
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uint32_t datasz, void *data)
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{
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if (!GLRO(dl_aarch64_cpu_features).bti)
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/* Skip note processing. */
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return 0;
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if (type == GNU_PROPERTY_AARCH64_FEATURE_1_AND)
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{
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/* Stop if the property note is ill-formed. */
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if (datasz != 4)
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return 0;
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unsigned int feature_1 = *(unsigned int *) data;
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if (feature_1 & GNU_PROPERTY_AARCH64_FEATURE_1_BTI)
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_dl_bti_protect (l, fd);
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/* Stop if we processed the property note. */
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return 0;
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}
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/* Continue. */
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return 1;
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}
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#endif /* _DL_PROP_H */
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