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https://github.com/jart/cosmopolitan.git
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b8a6a989c0
This change greatly reduces the number of modules that need to be compiled. The only issue right now is that sometimes when viewing symbol table entries, the aliased symbol is chosen.
27 lines
908 B
C
27 lines
908 B
C
#ifndef COSMOPOLITAN_LIBC_BITS_SEGMENTATION_H_
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#define COSMOPOLITAN_LIBC_BITS_SEGMENTATION_H_
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#if !(__ASSEMBLER__ + __LINKER__ + 0)
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#if defined(__GNUC__) && !defined(__STRICT_ANSI__)
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#ifdef COSMO
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/**
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* Reads scalar from memory, offset by segment.
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*
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* @return *(MEM) relative to segment
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* @see arch_prctl()
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* @see pushpop()
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*/
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#define fs(MEM) __peek("fs", MEM)
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#define gs(MEM) __peek("gs", MEM)
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#define __peek(SEGMENT, ADDRESS) \
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({ \
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typeof(*(ADDRESS)) Pk; \
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asm("mov\t%%" SEGMENT ":%1,%0" : "=r"(Pk) : "m"(*(ADDRESS))); \
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Pk; \
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})
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#endif /* COSMO */
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#endif /* __GNUC__ && !__STRICT_ANSI__ */
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#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
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#endif /* COSMOPOLITAN_LIBC_BITS_SEGMENTATION_H_ */
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