feat: Initial arm64 support

This includes `monika_linux`, `haiku_loader`, and `hyclone_server`.

`build_hprefix.sh` will not work yet since arm64 packages are not
available on HaikuPorts yet.

HPREFIXes themselves will also not work due to errors/stubs in Haiku's
own `runtime_loader`.

.gitignore

@@ -14,5 +14,5 @@
 build/**
 **/*.o
 **/*.a
-**/*.so
-**/haiku_include/**
+**/*.so*
+**/haiku_include/**

haiku_loader/sys/linux/loader_commpage.cpp

@@ -50,6 +50,12 @@ void* loader_allocate_commpage()
     // Stubbed.
     realTimeData->arch_data.system_time_conversion_factor = 0;
     realTimeData->arch_data.system_time_offset = 0;
+#elif defined(__aarch64__)
+    // Stubbed.
+    realTimeData->arch_data.data[0].system_time_offset = 0;
+    realTimeData->arch_data.data[1].system_time_offset = 0;
+    realTimeData->arch_data.system_time_conversion_factor = 0;
+    realTimeData->arch_data.version = 0;
 #else
 #warning commpage time data not set up for this architecture.
 #endif

monika/linux/linux_syscall.S

@@ -35,8 +35,14 @@ linux_syscall:
 	pop		%ebx
 	ret
 
+#elif defined(__aarch64__)
+
+	mov x8, x6
+	svc 0
+	ret
+
 #else
 
 #	error Missing assembly!
 
-#endif
+#endif

monika/linux/process.cpp

@@ -2,9 +2,9 @@
 #include "haiku_signal.h"
 
 #include <cstddef>
-#include <linux/resource.h>
 #include <memory.h>
 #include <signal.h>
+#include <sys/resource.h>
 #include <wait.h>
 
 #include "BeDefs.h"
@@ -270,4 +270,4 @@ haiku_pid_t _moni_setsid()
     return result;
 }
 
-}
+}

monika/linux/signal_conversion.cpp

@@ -384,7 +384,22 @@ void ContextLinuxToB(const ucontext_t& linuxContext, haiku_ucontext_t& context)
 
     // TODO: floating point registers.
     memset(&context.uc_mcontext.fpu, 0, sizeof(context.uc_mcontext.fpu));
+#elif defined(__aarch64__)
+    for (int i = 0; i < 29; ++i)
+    {
+        context.uc_mcontext.x[i] = linuxContext.uc_mcontext.regs[i];
+    }
+    context.uc_mcontext.lr = linuxContext.uc_mcontext.regs[30];
+    context.uc_mcontext.sp = linuxContext.uc_mcontext.sp;
+
+    // TODO: additional rocessor state
+    // https://elixir.bootlin.com/linux/latest/source/arch/arm64/include/uapi/asm/sigcontext.h
+    context.uc_mcontext.elr = 0;
+    context.uc_mcontext.spsr = 0;
+    memset(&context.uc_mcontext.fp_q, 0, sizeof(context.uc_mcontext.fp_q));
+    context.uc_mcontext.fpsr = 0;
+    context.uc_mcontext.fpcr = 0;
 #else
 # error Implement mcontext_t marshalling on this platform!
 #endif
-}
+}

monika/linux/signal_restore.S

@@ -22,8 +22,15 @@ __restore_rt:
 	movl $173, %eax
 	int $0x80
 
+#elif defined(__aarch64__)
+
+__restore:
+__restore_rt:
+	mov x8,#139 // SYS_rt_sigreturn
+	svc 0
+
 #else
 
 #	error Missing assembly!
 
-#endif
+#endif

shared_headers/BeDefs.h

@@ -11,6 +11,9 @@ typedef unsigned int        uint32;
 typedef int64_t             int64;
 typedef uint64_t            uint64;
 
+typedef volatile int32      vint32;
+typedef volatile int64      vint64;
+
 typedef unsigned char       uchar;
 
 typedef int32 status_t;
@@ -65,6 +68,9 @@ typedef long signed int     haiku_ssize_t;
 #ifdef __x86_64__
 #define B_PAGE_SIZE         4096
 #define B_HAIKU_64_BIT      1
+#elif defined(__aarch64__)
+#define B_PAGE_SIZE         4096
+#define B_HAIKU_64_BIT      1
 #endif
 
 struct user_space_program_args
@@ -101,4 +107,4 @@ enum
                                         | B_TIMEOUT_REAL_TIME_BASE
 };
 
-#endif // __HAIKU_STRUCTS_H__
+#endif // __HAIKU_STRUCTS_H__

shared_headers/arm64/arch_commpage_defs.h

@@ -0,0 +1,15 @@
+/*
+ * Copyright 2019 Haiku, Inc. All Rights Reserved.
+ * Distributed under the terms of the MIT License.
+ */
+
+#ifndef _SYSTEM_ARCH_ARM64_COMMPAGE_DEFS_H
+#define _SYSTEM_ARCH_ARM64_COMMPAGE_DEFS_H
+
+#ifndef _SYSTEM_COMMPAGE_DEFS_H
+#	error Must not be included directly. Include <commpage_defs.h> instead!
+#endif
+
+#define COMMPAGE_ENTRY_ARM64_THREAD_EXIT (COMMPAGE_ENTRY_FIRST_ARCH_SPECIFIC + 0)
+
+#endif	/* _SYSTEM_ARCH_ARM64_COMMPAGE_DEFS_H */

shared_headers/arm64/arch_debugger.h

@@ -0,0 +1,16 @@
+/*
+ * Copyright 2019 Haiku, Inc. All Rights Reserved.
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef _ARCH_ARM64_DEBUGGER_H
+#define _ARCH_ARM64_DEBUGGER_H
+
+struct arm64_debug_cpu_state {
+	unsigned long x[30];
+	unsigned long lr;
+	unsigned long sp;
+	unsigned long elr;
+	unsigned int  spsr;
+} __attribute__((aligned(16)));
+
+#endif	// _ARCH_ARM_DEBUGGER_H

shared_headers/arm64/arch_real_time_data.h

@@ -0,0 +1,20 @@
+/*
+ * Copyright 2019 Haiku, Inc. All Rights Reserved.
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef _KERNEL_ARCH_REAL_TIME_DATA_H
+#define _KERNEL_ARCH_REAL_TIME_DATA_H
+
+#include "BeDefs.h"
+
+struct arm64_real_time_data {
+	vint64	system_time_offset;
+};
+
+struct arch_real_time_data {
+	struct arm64_real_time_data	data[2];
+	vint32						system_time_conversion_factor;
+	vint32						version;
+};
+
+#endif	/* _KERNEL_ARCH_REAL_TIME_DATA_H */

shared_headers/arm64/arch_signal.h

@@ -0,0 +1,29 @@
+/*
+ * Copyright 2019 Haiku, Inc. All Rights Reserved.
+ * Distributed under the terms of the MIT License.
+ */
+
+#ifndef _ARCH_ARM64_SIGNAL_H_
+#define _ARCH_ARM64_SIGNAL_H_
+
+
+/*
+ * Architecture-specific structure passed to signal handlers
+ */
+
+#if defined(__aarch64__)
+struct vregs
+{
+	unsigned long	x[30];
+	unsigned long	lr;
+	unsigned long	sp;
+	unsigned long	elr;
+	unsigned long	spsr;
+	__uint128_t	    fp_q[32];
+	unsigned int	fpsr;
+	unsigned int	fpcr;
+};
+#endif /* defined(__aarch64__) */
+
+
+#endif /* _ARCH_ARM64_SIGNAL_H_ */