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37 .Nd manage i386 per-process Local Descriptor Table entries
41 .In machine/segments.h
44 .Fn i386_get_ldt "int start_sel" "union descriptor *descs" "int num_sels"
46 .Fn i386_set_ldt "int start_sel" "union descriptor *descs" "int num_sels"
51 returns a list of the i386 descriptors in the current process'
56 sets a list of i386 descriptors in the current process'
60 specifies the index of the selector in the LDT at which to begin and
64 descriptors to be set or returned.
68 array can be either a segment_descriptor or gate_descriptor and are defined in
70 These structures are defined by the architecture
71 as disjoint bit-fields, so care must be taken in constructing them.
78 is 1 and the descriptor pointed to by
82 will allocate a descriptor and return its
93 will free that descriptor
94 (making it available to be reallocated again later).
102 is NULL then, as a special case,
104 will free all descriptors.
106 Upon successful completion,
108 returns the number of descriptors currently in the LDT.
112 returns the first selector set on success.
113 If the kernel allocated a descriptor in the LDT,
114 the allocated index is returned.
115 Otherwise, a value of -1 is returned and the global
118 is set to indicate the error.
128 An inappropriate value was used for
133 The caller attempted to use a descriptor that would
134 circumvent protection or cause a failure.
137 i386 Microprocessor Programmer's Reference Manual, Intel
139 You can really hose your process using this.