Adhemerval Zanella 7e31d16651 elf: Fix GL(dl_phdr) and GL(dl_phnum) for static builds [BZ #29864] ... The 73fc4e28b9 refactor did not add the GL(dl_phdr) and GL(dl_phnum) for static build, relying on the __ehdr_start symbol, which is always added by the static linker, to get the correct values. This is problematic in some ways: - The segment may see its in-memory size differ from its in-file size (or the binary may have holes). The Linux has fixed is to provide concise values for both AT_PHDR and AT_PHNUM (commit 0da1d5002745c - "fs/binfmt_elf: Fix AT_PHDR for unusual ELF files") - Some archs (alpha for instance) the hidden weak reference is not correctly pulled by the static linker and __ehdr_start address end up being 0, which makes GL(dl_phdr) and GL(dl_phnum) have both invalid values (and triggering a segfault later on libc.so while accessing TLS variables). The safer fix is to just restore the previous behavior to setup GL(dl_phdr) and GL(dl_phnum) for static based on kernel auxv. The __ehdr_start fallback can also be simplified by not assuming weak linkage (as for PIE). The libc-static.c auxv init logic is moved to dl-support.c, since the later is build without SHARED and then GLRO macro is defined to access the variables directly. The _dl_phdr is also assumed to be always non NULL, since an invalid NULL values does not trigger TLS initialization (which is used in various libc systems). Checked on aarch64-linux-gnu, x86_64-linux-gnu, and i686-linux-gnu. Reviewed-by: Florian Weimer <fweimer@redhat.com>		2023-01-12 13:54:34 -03:00
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abi-note.c	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
check_fds.c	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
dso_handle.c	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
errno-loc.c	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
errno.c	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
gmon-start.c	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
init-first.c	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
init.c	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
libc-start.c	elf: Fix GL(dl_phdr) and GL(dl_phnum) for static builds [BZ #29864]	2023-01-12 13:54:34 -03:00
libc-tls.c	elf: Fix GL(dl_phdr) and GL(dl_phnum) for static builds [BZ #29864]	2023-01-12 13:54:34 -03:00
Makefile	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
rtld-sizes.sym	Extend struct r_debug to support multiple namespaces [BZ #15971]	2021-09-19 13:51:35 -07:00
start.c	More fallout from supporting only ELF	2012-01-08 00:45:01 -05:00
static-reloc.c	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
sysdep.c	Moved to csu/errno-loc.c.	2005-12-14 15:06:39 +00:00
version.c	Update copyright dates with scripts/update-copyrights	2023-01-06 21:14:39 +00:00
Versions	Reduce the statically linked startup code [BZ #23323]	2021-02-25 12:13:02 +01:00