Date: Sun, 04 Apr 2021 23:51:19 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 254774] [rtld] dl_iterate_phdr: dlpi_tls_data should be the iterated module's TLS image instead of TLS initialization image Message-ID: <bug-254774-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D254774 Bug ID: 254774 Summary: [rtld] dl_iterate_phdr: dlpi_tls_data should be the iterated module's TLS image instead of TLS initialization image Product: Base System Version: Unspecified Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: misc Assignee: bugs@FreeBSD.org Reporter: emacsray@gmail.com glibc d78efd9f369a8fc46229fc9224e10e3781eecc43 (2006-02) introduced dlpi_tls_modid and dlpi_tls_data. dlpi_tls_data is the allocated TLS image associated to the module dlpi_tls_modid. The Linux manpage documents the two members as: size_t dlpi_tls_modid; /* If there is a PT_TLS segment, its module ID as used in TLS relocations, else zero = */ void *dlpi_tls_data; /* The address of the calling thread's insta= nce of this module's PT_TLS segment, if it has one and it has been allocated in the call= ing thread, otherwise a null pointer */ In FreeBSD, dlpi_tls_data is however the TLS initialization image as part of the underlying file. I plan to use dl_iterate_phdr in compiler-rt's sanitizer runtime to simplify TLS handling, but unfortunately FreeBSD dlpi_tls_data does not have the desired semantics= :( --=20 You are receiving this mail because: You are the assignee for the bug.=
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