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Kernel: Make the kernel compile & link for x86_64

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It's now possible to build the whole kernel with an x86_64 toolchain.
There's no bootstrap code so it doesn't work yet (obviously.)
This commit is contained in:
Andreas Kling 2021-03-04 17:50:05 +01:00
parent aae91dda66
commit adb2e6be5f
15 changed files with 316 additions and 48 deletions
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32
Kernel/Arch/i386/CPU.cpp
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@ -76,6 +76,7 @@ extern "C" void handle_interrupt(TrapFrame*);
// clang-format off
#if ARCH(I386)
#define EH_ENTRY(ec, title) \
extern "C" void title##_asm_entry(); \
extern "C" void title##_handler(TrapFrame*); \
@ -127,6 +128,26 @@ extern "C" void handle_interrupt(TrapFrame*);
" call " #title "_handler\n" \
" jmp common_trap_exit \n");
#elif ARCH(X86_64)
#define EH_ENTRY(ec, title) \
extern "C" void title##_asm_entry(); \
extern "C" void title##_handler(TrapFrame*); \
asm( \
".globl " #title "_asm_entry\n" \
"" #title "_asm_entry: \n" \
" cli;hlt;\n" \
);
#define EH_ENTRY_NO_CODE(ec, title) \
extern "C" void title##_handler(TrapFrame*); \
extern "C" void title##_asm_entry(); \
asm( \
".globl " #title "_asm_entry\n" \
"" #title "_asm_entry: \n" \
" cli;hlt;\n" \
);
#endif
// clang-format on
static void dump(const RegisterState& regs)
@ -1593,6 +1614,7 @@ extern "C" u32 do_init_context(Thread* thread, u32 flags)
extern "C" void do_assume_context(Thread* thread, u32 flags);
#if ARCH(I386)
// clang-format off
asm(
".global do_assume_context \n"
@ -1614,8 +1636,9 @@ asm(
" jmp enter_thread_context \n"
);
// clang-format on
#endif
void Processor::assume_context(Thread& thread, u32 flags)
void Processor::assume_context(Thread& thread, FlatPtr flags)
{
dbgln_if(CONTEXT_SWITCH_DEBUG, "Assume context for thread {} {}", VirtualAddress(&thread), thread);
@ -1624,7 +1647,12 @@ void Processor::assume_context(Thread& thread, u32 flags)
// in_critical() should be 2 here. The critical section in Process::exec
// and then the scheduler lock
VERIFY(Processor::current().in_critical() == 2);
#if ARCH(I386)
do_assume_context(&thread, flags);
#elif ARCH(X86_64)
(void)flags;
TODO();
#endif
VERIFY_NOT_REACHED();
}
@ -2315,12 +2343,14 @@ UNMAP_AFTER_INIT void Processor::gdt_init()
: "memory");
set_fs(GDT_SELECTOR_PROC);
#if ARCH(I386)
// Make sure CS points to the kernel code descriptor.
// clang-format off
asm volatile(
"ljmpl $" __STRINGIFY(GDT_SELECTOR_CODE0) ", $sanity\n"
"sanity:\n");
// clang-format on
#endif
}
void copy_kernel_registers_into_ptrace_registers(PtraceRegisters& ptrace_regs, const RegisterState& kernel_regs)