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save AT_HWCAP from auxv for subsequent use in machine-specific code

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it's expected that this will be needed/useful only in asm, so I've
given it its own symbol that can be addressed in pc-relative ways from
asm rather than adding a field in the __libc structure which would
require hard-coding the offset wherever it's used.
This commit is contained in:
Rich Felker
2012-07-27 00:14:57 -04:00
parent 07e62953c7
commit e1b9c1b01b
3 changed files with 4 additions and 0 deletions
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src/internal/libc.h
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@ -18,6 +18,7 @@ struct __libc {
int ofl_lock[2];
};
extern size_t __hwcap;
#if !defined(__PIC__) || 100*__GNUC__+__GNUC_MINOR__ >= 303 || defined(__PCC__) || defined(__TINYC__)