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7d6e30b4b4
Using TLS directly introduces a GLIBC_PRIVATE ABI dependency into libc_nonshared.a, and thus indirectly into applications. Adding the !defined LIBC_NONSHARED condition deactivates direct TLS access, and libc_nonshared.a code switches to using __errno_location, like application code. Currently, this has no effect because there is no code in libc_nonshared.a that accesses errno. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
46 lines
1.1 KiB
C
46 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) && !defined LIBC_NONSHARED
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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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