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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. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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@ -175,8 +175,12 @@ LIBC_START_MAIN (int (*main) (int, char **, char ** MAIN_AUXVEC_DECL),
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information from auxv. */
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extern const ElfW(Ehdr) __ehdr_start
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# if BUILD_PIE_DEFAULT
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__attribute__ ((visibility ("hidden")));
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# else
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__attribute__ ((weak, visibility ("hidden")));
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if (&__ehdr_start != NULL)
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# endif
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{
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assert (__ehdr_start.e_phentsize == sizeof *GL(dl_phdr));
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GL(dl_phdr) = (const void *) &__ehdr_start + __ehdr_start.e_phoff;
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