29 lines
1.0 KiB
C
29 lines
1.0 KiB
C
#ifndef COSMOPOLITAN_LIBC_BITS_WEAKEN_H_
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#define COSMOPOLITAN_LIBC_BITS_WEAKEN_H_
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#include "libc/bits/ezlea.h"
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#if !(__ASSEMBLER__ + __LINKER__ + 0)
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#ifndef __STRICT_ANSI__
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#define weaken(symbol) ((const typeof(&(symbol)))weakaddr(#symbol))
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#define strongaddr(symbolstr) \
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({ \
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intptr_t waddr; \
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asm(ezlea(symbolstr) "0" : "=r"(waddr)); \
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waddr; \
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})
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#define weakaddr(symbolstr) \
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({ \
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intptr_t waddr; \
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asm(".weak\t" symbolstr "\n\t" ezlea(symbolstr) "0" : "=r"(waddr)); \
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waddr; \
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})
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#else
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#define weaken(symbol) symbol
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#define weakaddr(symbolstr) &(symbolstr)
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#endif /* __STRICT_ANSI__ */
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#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
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#endif /* COSMOPOLITAN_LIBC_BITS_WEAKEN_H_ */
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