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Kernel: Implement entry code for x86_64 interrupts

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With this fixed we can now properly handle interrupts (e.g. timer
interrupts) on x86_64.
This commit is contained in:
Gunnar Beutner 2021-06-27 17:23:38 +02:00 • committed by Andreas Kling
parent 328d44e227
commit 076692b1ef
2 changed files with 31 additions and 3 deletions
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4
Kernel/Arch/x86/RegisterState.h
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@ -47,11 +47,11 @@ struct [[gnu::packed]] RegisterState {
FlatPtr r14;
FlatPtr r15;
#endif
u16 exception_code;
u16 isr_number;
#if ARCH(X86_64)
u32 padding;
#endif
u16 exception_code;
u16 isr_number;
#if ARCH(I386)
FlatPtr eip;
#else

30
Kernel/Arch/x86/x86_64/InterruptEntry.cpp
View file

@ -12,7 +12,35 @@
asm(
".globl interrupt_common_asm_entry\n"
"interrupt_common_asm_entry: \n"
" hlt \n" // FIXME
// add the padding field in RegisterState
" subq $4, %rsp\n"
" movl $0, 0(%rsp)\n"
// save all the other registers
" pushq %r15\n"
" pushq %r14\n"
" pushq %r13\n"
" pushq %r12\n"
" pushq %r11\n"
" pushq %r10\n"
" pushq %r9\n"
" pushq %r8\n"
" pushq %rax\n"
" pushq %rcx\n"
" pushq %rdx\n"
" pushq %rbx\n"
" pushq %rsp\n"
" pushq %rbp\n"
" pushq %rsi\n"
" pushq %rdi\n"
" pushq %rsp \n" /* set TrapFrame::regs */
" subq $" __STRINGIFY(TRAP_FRAME_SIZE - 8) ", %rsp \n"
" subq $0x8, %rsp\n" /* align stack */
" lea 0x8(%rsp), %rdi \n"
" cld\n"
" call enter_trap \n"
" lea 0x8(%rsp), %rdi \n"
" call handle_interrupt \n"
" addq $0x8, %rsp\n" /* undo alignment */
".globl common_trap_exit \n"
"common_trap_exit: \n"
// another thread may have handled this trap at this point, so don't