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i386_get_ldt, i386_set_ldt —

i386 ?ץ????????ȤΥ??????뵭?һҥơ??֥륨???ȥ???????????

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Standard C Library (libc, -lc)

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<machine/segments.h> <machine/sysarch.h> int i386_get_ldt(int start_sel, union descriptor *descs, int num_sels) int i386_set_ldt(int start_sel, union descriptor *descs, int num_sels)

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i386_get_ldt() ?????ƥॳ?????ϥץ??????? LDT ?????ˤ??? i386 ???һҤΥꥹ?Ȥ??֤??ޤ??? i386_set_ldt() ?????ƥॳ?????ϸ??ߤΥץ??????Τ????? i386 ???һҤΥꥹ?Ȥ??? ???Υץ??????? LDT ?????ꤷ?ޤ??? ξ???Υ롼?????ϡ????Ϥ??륻?쥯???ֹ??? start_sel ?ȡ????ꤹ?뵭?һҤ????ä????ޤ??ϵ??һҤ??֤??????????????????? descs ???????????ޤ????֤????륨???ȥ????? num_sels ???????????ޤ???

???? descs ?ϡ? <i386/segments.h> ???????????Ƥ??? segment_descriptor ?ޤ??? gate_descriptor ?Ǥ??뤳?Ȥ??Ǥ??ޤ??? ???????ι??????Ǥϡ????????ƥ????????б????? ?Ф??Ф??ˤʤä??ӥåȥե??????ɤȤ????????????Ƥ????Τǡ? ?????????Ȥ?Ω?Ƥ??ݤˤ????դ?ʧ??ɬ?פ??????ޤ???

start_sel ?? LDT_AUTO_ALLOC ?ǡ? num_sels ?? 1 ?ǡ? descs ?ˤ??äƻؤ????뵭?һҤ??????Ǥ????????ˤϡ? i386_set_ldt() ?ϵ??һҤ????????Ƥơ????Υ??쥯???ֹ????֤??ޤ???

num_descs ?? 1 ?ǡ? start_sels ??ͭ???ǡ? descs ?? NULL ?ξ????ˤϡ? i386_set_ldt() ?Ϥ??ε??һҤ????????ޤ? (???Ǥޤ??Ƴ??????ƤǤ????褦?ˤ??ޤ?)??

num_descs ?? 0 ?ǡ? start_sels ?? 0 ?ǡ? descs ?? NULL ?ξ????ˤ????̤ʾ????Ȥ??ơ? i386_set_ldt() ?????Ƥε??һҤ????????ޤ???

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?????˴?λ???????硢 i386_get_ldt() ?ϸ??? LDT ???ˤ??뵭?һҤο????֤??ޤ??? i386_set_ldt() ?????ƥॳ?????Ϻǽ??Υ??쥯?????åȤ??֤??ޤ??? ???һҤ??????ͥ??ˤ??äƳ??????Ƥ??줿?????ˤϡ????ο????֤????ޤ??? ?????Ǥʤ??????? -1 ???֤??졢???顼?򼨤??????˥??????Х??ѿ? errno ?????ꤵ???ޤ???

???顼

i386_get_ldt() ?? i386_set_ldt() ?????ƥॳ?????ϼ??ξ????˼??Ԥ??ޤ?:

[EINVAL]: start_sel ?ޤ??? num_sels ?ˤĤ?????Ŭ?ڤ??ͤ????Ѥ????ޤ?????
[EACCES]: ?ƤӽФ?¦???ݸ???򵽤????ޤ??Ͼ㳲?򵯤??????һҤ??Ȥ????Ȥ??ޤ?????

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i386 Microprocessor Programmer's Reference Manual, Intel

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