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Kernel: Add support for interrupts on x86_64
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parent
233ef26e4d
commit
065c6c307d
4 changed files with 98 additions and 19 deletions
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@ -116,9 +116,15 @@ struct [[gnu::packed]] IDTEntry
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u16 offset_1; // offset bits 0..15
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u16 selector; // a code segment selector in GDT or LDT
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u8 zero; // unused, set to 0 (maybe used on amd64)
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#if ARCH(I386)
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u8 zero; // unused, set to 0
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#else
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struct {
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u8 interrupt_stack_table : 3;
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u8 zero : 5; // unused, set to 0
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};
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#endif
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struct {
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// FIXME: Is the order correct?
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u8 gate_type : 4;
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u8 storage_segment : 1;
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u8 descriptor_privilege_level : 2;
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@ -126,7 +132,6 @@ struct [[gnu::packed]] IDTEntry
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} type_attr; // type and attributes
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u16 offset_2; // offset bits 16..31
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#if !ARCH(I386)
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// we may need to switch those around?
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u32 offset_3;
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u32 zeros;
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#endif
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@ -135,6 +140,9 @@ struct [[gnu::packed]] IDTEntry
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IDTEntry(FlatPtr callback, u16 selector_, IDTEntryType type, u8 storage_segment, u8 privilege_level)
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: offset_1 { (u16)((FlatPtr)callback & 0xFFFF) }
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, selector { selector_ }
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#if !ARCH(I386)
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, interrupt_stack_table { 0 }
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#endif
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, zero { 0 }
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, type_attr {
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.gate_type = (u8)type,
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@ -150,7 +158,7 @@ struct [[gnu::packed]] IDTEntry
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{
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}
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u32 off()
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FlatPtr off()
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{
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#if ARCH(I386)
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return (u32)offset_2 << 16 & (u32)offset_1;
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@ -165,4 +173,6 @@ struct [[gnu::packed]] IDTEntry
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};
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// clang-format on
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static_assert(sizeof(IDTEntry) == 2 * sizeof(void*));
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}
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