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38fca26f54
This adds just enough stubs to make the kernel compile on x86_64. Obviously it won't do anything useful - in fact it won't even attempt to boot because Multiboot doesn't support ELF64 binaries - but it gets those compiler errors out of the way so more progress can be made getting all the missing functionality in place.
52 lines
1.7 KiB
C++
52 lines
1.7 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <Kernel/Arch/x86/DescriptorTable.h>
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#include <Kernel/Arch/x86/TrapFrame.h>
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// clang-format off
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asm(
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".globl interrupt_common_asm_entry\n"
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"interrupt_common_asm_entry: \n"
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" pusha\n"
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" pushl %ds\n"
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" pushl %es\n"
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" pushl %fs\n"
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" pushl %gs\n"
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" pushl %ss\n"
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" mov $" __STRINGIFY(GDT_SELECTOR_DATA0) ", %ax\n"
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" mov %ax, %ds\n"
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" mov %ax, %es\n"
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" mov $" __STRINGIFY(GDT_SELECTOR_PROC) ", %ax\n"
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" mov %ax, %fs\n"
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" pushl %esp \n" // set TrapFrame::regs
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" subl $" __STRINGIFY(TRAP_FRAME_SIZE - 4) ", %esp \n"
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" movl %esp, %ebx \n" // save pointer to TrapFrame
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" pushl %ebx \n"
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" cld\n"
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" call enter_trap \n"
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" movl %ebx, 0(%esp) \n" // push pointer to TrapFrame
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" call handle_interrupt\n"
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" movl %ebx, 0(%esp) \n" // push pointer to TrapFrame
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".globl common_trap_exit \n"
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"common_trap_exit: \n"
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// another thread may have handled this trap at this point, so don't
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// make assumptions about the stack other than there's a TrapFrame
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// and a pointer to it.
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" call exit_trap \n"
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" addl $" __STRINGIFY(TRAP_FRAME_SIZE + 4) ", %esp\n" // pop TrapFrame and pointer to it
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".globl interrupt_common_asm_exit \n"
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"interrupt_common_asm_exit: \n"
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" addl $4, %esp\n" // pop %ss
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" popl %gs\n"
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" popl %fs\n"
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" popl %es\n"
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" popl %ds\n"
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" popa\n"
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" addl $0x4, %esp\n" // skip exception_code, isr_number
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" iret\n"
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);
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// clang-format on
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