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38 lines
1.4 KiB
38 lines
1.4 KiB
#include "segment_intrin.h"
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namespace segment
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{
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auto get_access_rights(segment_descriptor_64* segment_descriptor) -> vmx_segment_access_rights
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{
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vmx_segment_access_rights result;
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result.granularity = segment_descriptor->granularity;
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result.type = segment_descriptor->type;
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result.descriptor_type = segment_descriptor->descriptor_type;
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result.present = segment_descriptor->present;
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result.long_mode = segment_descriptor->long_mode;
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result.available_bit = segment_descriptor->system;
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result.default_big = segment_descriptor->default_big;
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return result;
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}
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auto get_info(segment_descriptor_register_64 gdt_value, segment_selector segment_selector) -> hv::segment_info_ctx
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{
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hv::segment_info_ctx segment_info;
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const auto segment_descriptor =
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reinterpret_cast<segment_descriptor_64*>(
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gdt_value.base_address + (segment_selector.index << SEGMENT_SELECTOR_INDEX_BIT));
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segment_info.limit = __segmentlimit(segment_selector.flags);
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segment_info.rights = get_access_rights(segment_descriptor);
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segment_info.base_addr = (u32)((segment_descriptor->base_address_high << SEGMENT__BASE_ADDRESS_HIGH_BIT) |
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(segment_descriptor->base_address_middle << SEGMENT__BASE_ADDRESS_MIDDLE_BIT) |
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(segment_descriptor->base_address_low));
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segment_info.base_addr &= 0xFFFFFFFF;
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if (!segment_descriptor->descriptor_type)
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segment_info.base_addr |= ((u64)segment_descriptor->base_address_upper << SEGMENT__BASE_ADDRESS_SHIFT);
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return segment_info;
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}
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} |