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Kernel: Add Syscall.cpp to aarch64 build

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This commit is contained in:
Timon Kruiper 2023-01-25 16:04:13 +01:00 • committed by Linus Groh
parent b941bd55d9
commit 58cfd46a5a
2 changed files with 19 additions and 2 deletions
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2
Kernel/CMakeLists.txt
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@ -261,6 +261,7 @@ set(KERNEL_SOURCES
Scheduler.cpp Scheduler.cpp
ScopedCritical.cpp ScopedCritical.cpp
StdLib.cpp StdLib.cpp
Syscall.cpp
Syscalls/anon_create.cpp Syscalls/anon_create.cpp
Syscalls/alarm.cpp Syscalls/alarm.cpp
Syscalls/beep.cpp Syscalls/beep.cpp
@ -402,7 +403,6 @@ if ("${SERENITY_ARCH}" STREQUAL "x86_64")
Interrupts/SpuriousInterruptHandler.cpp Interrupts/SpuriousInterruptHandler.cpp
kprintf.cpp kprintf.cpp
Panic.cpp Panic.cpp
Syscall.cpp
) )
set(KERNEL_SOURCES set(KERNEL_SOURCES

19
Kernel/Syscall.cpp
View file

@ -7,7 +7,6 @@
#include <Kernel/API/Syscall.h> #include <Kernel/API/Syscall.h>
#include <Kernel/Arch/TrapFrame.h> #include <Kernel/Arch/TrapFrame.h>
#include <Kernel/Arch/x86_64/Interrupts.h>
#include <Kernel/Memory/MemoryManager.h> #include <Kernel/Memory/MemoryManager.h>
#include <Kernel/Panic.h> #include <Kernel/Panic.h>
#include <Kernel/PerformanceManager.h> #include <Kernel/PerformanceManager.h>
@ -16,6 +15,10 @@
#include <Kernel/Sections.h> #include <Kernel/Sections.h>
#include <Kernel/ThreadTracer.h> #include <Kernel/ThreadTracer.h>
#if ARCH(X86_64)
# include <Kernel/Arch/x86_64/Interrupts.h>
#endif
namespace Kernel { namespace Kernel {
extern "C" void syscall_handler(TrapFrame*) __attribute__((used)); extern "C" void syscall_handler(TrapFrame*) __attribute__((used));
@ -61,7 +64,9 @@ static ErrorOr<FlatPtr> handle(RegisterState&, FlatPtr function, FlatPtr arg1, F
UNMAP_AFTER_INIT void initialize() UNMAP_AFTER_INIT void initialize()
{ {
#if ARCH(X86_64)
register_user_callable_interrupt_handler(syscall_vector, syscall_asm_entry); register_user_callable_interrupt_handler(syscall_vector, syscall_asm_entry);
#endif
} }
using Handler = auto(Process::*)(FlatPtr, FlatPtr, FlatPtr, FlatPtr) -> ErrorOr<FlatPtr>; using Handler = auto(Process::*)(FlatPtr, FlatPtr, FlatPtr, FlatPtr) -> ErrorOr<FlatPtr>;
@ -140,8 +145,14 @@ ErrorOr<FlatPtr> handle(RegisterState& regs, FlatPtr function, FlatPtr arg1, Fla
NEVER_INLINE void syscall_handler(TrapFrame* trap) NEVER_INLINE void syscall_handler(TrapFrame* trap)
{ {
#if ARCH(X86_64)
// Make sure SMAP protection is enabled on syscall entry. // Make sure SMAP protection is enabled on syscall entry.
clac(); clac();
#elif ARCH(AARCH64)
// FIXME: Implement the security mechanism for aarch64
#else
# error Unknown architecture
#endif
auto& regs = *trap->regs; auto& regs = *trap->regs;
auto* current_thread = Thread::current(); auto* current_thread = Thread::current();
@ -161,6 +172,7 @@ NEVER_INLINE void syscall_handler(TrapFrame* trap)
current_thread->yield_if_stopped(); current_thread->yield_if_stopped();
#if ARCH(X86_64)
// Apply a random offset in the range 0-255 to the stack pointer, // Apply a random offset in the range 0-255 to the stack pointer,
// to make kernel stacks a bit less deterministic. // to make kernel stacks a bit less deterministic.
u32 lsw; u32 lsw;
@ -177,6 +189,11 @@ NEVER_INLINE void syscall_handler(TrapFrame* trap)
if ((flags & (iopl_mask)) != 0) { if ((flags & (iopl_mask)) != 0) {
PANIC("Syscall from process with IOPL != 0"); PANIC("Syscall from process with IOPL != 0");
} }
#elif ARCH(AARCH64)
// FIXME: Implement the security mechanism for aarch64
#else
# error Unknown architecture
#endif
Memory::MemoryManager::validate_syscall_preconditions(process, regs); Memory::MemoryManager::validate_syscall_preconditions(process, regs);