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fa97d2ab5b
Letting rtld access errno through TLS can not work at early stages since TLS will not be initialized yet. When a private errno is not possible, we thus have no other way than going through __errno_location. * include/errno.h [IS_IN(rtld) && !RTLD_PRIVATE_ERRNO]: Do not use the TLS declaration of errno.
48 lines
1.1 KiB
C
48 lines
1.1 KiB
C
#ifndef _ERRNO_H
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#include <stdlib/errno.h>
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#if !defined _ISOMAC && !defined __ASSEMBLER__
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# if IS_IN (rtld)
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# include <dl-sysdep.h>
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# ifndef RTLD_PRIVATE_ERRNO
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# error "dl-sysdep.h must define RTLD_PRIVATE_ERRNO!"
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# endif
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# else
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# define RTLD_PRIVATE_ERRNO 0
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# endif
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# if RTLD_PRIVATE_ERRNO
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/* The dynamic linker uses its own private errno variable.
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All access to errno inside the dynamic linker is serialized,
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so a single (hidden) global variable is all it needs. */
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# undef errno
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# define errno rtld_errno
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extern int rtld_errno attribute_hidden;
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# elif IS_IN_LIB && !IS_IN (rtld)
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# include <tls.h>
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# undef errno
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# if IS_IN (libc)
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# define errno __libc_errno
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# else
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# define errno errno /* For #ifndef errno tests. */
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# endif
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extern __thread int errno attribute_tls_model_ie;
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# endif /* IS_IN_LIB */
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# define __set_errno(val) (errno = (val))
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extern int *__errno_location (void) __THROW __attribute_const__
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# if RTLD_PRIVATE_ERRNO
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attribute_hidden
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# endif
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;
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libc_hidden_proto (__errno_location)
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#endif /* !_ISOMAC && !__ASSEMBLER__ */
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#endif /* !_ERRNO_H */
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