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| author | Szabolcs Nagy <szabolcs.nagy@arm.com> | 2021-01-06 14:28:02 +0000 |
|---|---|---|
| committer | Szabolcs Nagy <szabolcs.nagy@arm.com> | 2021-01-20 14:42:46 +0000 |
| commit | 4da71cb981057048e8cf9dec8731ad936b433e38 (patch) | |
| tree | 5c1e3843d2a5093ac69b6d3f1dd3c89b47b5cd8f | |
| parent | 51119c6aa5f2a7ff0966d5c9fda4a61d781591fb (diff) | |
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csu: Avoid weak ref for __ehdr_start in static PIE
All linkers support __ehdr_start that support static PIE linking,
so there is no need to check for its presence via a weak reference.
This avoids a RELATIVE relocation in static PIE startup code on some
targets.
With non-PIE static linking the weak ref check is kept in case the
linker does not support __ehdr_start.
| -rw-r--r-- | csu/libc-start.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/csu/libc-start.c b/csu/libc-start.c index db859c3bed..5b9ce1d158 100644 --- a/csu/libc-start.c +++ b/csu/libc-start.c @@ -175,8 +175,12 @@ LIBC_START_MAIN (int (*main) (int, char **, char ** MAIN_AUXVEC_DECL), information from auxv. */ extern const ElfW(Ehdr) __ehdr_start +# if BUILD_PIE_DEFAULT + __attribute__ ((visibility ("hidden"))); +# else __attribute__ ((weak, visibility ("hidden"))); if (&__ehdr_start != NULL) +# endif { assert (__ehdr_start.e_phentsize == sizeof *GL(dl_phdr)); GL(dl_phdr) = (const void *) &__ehdr_start + __ehdr_start.e_phoff; |