support to utility thread offloading

executer/user/arch/x86_64/arch_args.h

@@ -0,0 +1,113 @@
+#ifndef ARCH_ARGS_H
+#define ARCH_ARGS_H
+
+typedef struct user_regs_struct syscall_args;
+
+static inline int
+get_syscall_args(int pid, syscall_args *args)
+{
+	return ptrace(PTRACE_GETREGS, pid, NULL, args);
+}
+
+static inline int
+set_syscall_args(int pid, syscall_args *args)
+{
+	return ptrace(PTRACE_SETREGS, pid, NULL, args);
+}
+
+static inline unsigned long
+get_syscall_number(syscall_args *args)
+{
+	return args->orig_rax;
+}
+
+static inline unsigned long
+get_syscall_return(syscall_args *args)
+{
+	return args->rax;
+}
+
+static inline unsigned long
+get_syscall_arg1(syscall_args *args)
+{
+	return args->rdi;
+}
+
+static inline unsigned long
+get_syscall_arg2(syscall_args *args)
+{
+	return args->rsi;
+}
+
+static inline unsigned long
+get_syscall_arg3(syscall_args *args)
+{
+	return args->rdx;
+}
+
+static inline unsigned long
+get_syscall_arg4(syscall_args *args)
+{
+	return args->r10;
+}
+
+static inline unsigned long
+get_syscall_arg5(syscall_args *args)
+{
+	return args->r8;
+}
+
+static inline unsigned long
+get_syscall_arg6(syscall_args *args)
+{
+	return args->r9;
+}
+
+static inline void
+set_syscall_number(syscall_args *args, unsigned long value)
+{
+	args->orig_rax = value;
+}
+
+static inline void
+set_syscall_return(syscall_args *args, unsigned long value)
+{
+	args->rax = value;
+}
+
+static inline void
+set_syscall_arg1(syscall_args *args, unsigned long value)
+{
+	args->rdi = value;
+}
+
+static inline void
+set_syscall_arg2(syscall_args *args, unsigned long value)
+{
+	args->rsi = value;
+}
+
+static inline void
+set_syscall_arg3(syscall_args *args, unsigned long value)
+{
+	args->rdx = value;
+}
+
+static inline void
+set_syscall_arg4(syscall_args *args, unsigned long value)
+{
+	args->r10 = value;
+}
+
+static inline void
+set_syscall_arg5(syscall_args *args, unsigned long value)
+{
+	args->r8 = value;
+}
+
+static inline void
+set_syscall_arg6(syscall_args *args, unsigned long value)
+{
+	args->r9 = value;
+}
+#endif

executer/user/arch/x86_64/archdep.S

@@ -0,0 +1,149 @@
+/*
+arg: rdi, rsi, rdx, rcx, r8, r9
+ret: rax
+
+rax syscall number
+syscall: (rax:num) rdi rsi rdx r10 r8 r9 (rcx:ret addr)
+fd, cmd, param
+rdi: fd
+rsi: cmd
+rdx: param
+rcx: save area
+r8: new thread context
+*/
+
+.global switch_ctx
+switch_ctx:
+	movq	$0,0x00(%rcx)
+	movq	%rax,0x8(%rcx)
+	movq	%rbx,0x10(%rcx)
+	movq	%rcx,0x18(%rcx)
+	movq	%rdx,0x20(%rcx)
+	movq	%rsi,0x28(%rcx)
+	movq	%rdi,0x30(%rcx)
+	movq	%rbp,0x38(%rcx)
+	movq	%r8,0x40(%rcx)
+	movq	%r9,0x48(%rcx)
+	movq	%r10,0x50(%rcx)
+	movq	%r11,0x58(%rcx)
+	movq	%r12,0x60(%rcx)
+	movq	%r13,0x68(%rcx)
+	movq	%r14,0x70(%rcx)
+	movq	%r15,0x78(%rcx)
+	pushfq
+	popq	%rax
+	movq	%rax,0x80(%rcx)
+	movq	0x00(%rsp),%rax
+	movq	%rax,0x88(%rcx)
+	movq	%rsp,0x90(%rcx)
+	movq	%rcx,%r10
+
+	pushq	%rcx
+	pushq	%r8
+	pushq	%rax
+
+	mov	$0x10,%eax /* ioctl */
+	syscall
+3:
+
+	popq	%r8
+	popq	%r8
+	popq	%rcx
+
+	movq	%r10,%rcx
+	cmp	$0xfffffffffffff001,%eax
+	jae	1f
+
+	test	%eax,%eax
+	jnz	2f
+
+	pushq	%rax
+	movq	$158,%rax /* arch_prctl */
+	movq	$0x1002,%rdi /* ARCH_SET_FS */
+	movq	0x98(%r8),%rsi
+	syscall
+	popq	%rax
+
+	movq	0x10(%r8),%rbx
+	movq	0x18(%r8),%rcx
+	movq	0x20(%r8),%rdx
+	movq	0x28(%r8),%rsi
+	movq	0x30(%r8),%rdi
+	movq	0x38(%r8),%rbp
+	movq	0x48(%r8),%r9
+	movq	0x50(%r8),%r10
+	movq	0x58(%r8),%r11
+	movq	0x60(%r8),%r12
+	movq	0x68(%r8),%r13
+	movq	0x70(%r8),%r14
+	movq	0x78(%r8),%r15
+	movq	0x80(%r8),%rax
+	pushq	%rax
+	popfq
+	movq	0x90(%r8),%rsp
+//	movq	0x8(%r8),%rax /* for interrupts */
+	movq	0x40(%r8),%r8
+
+	movq	$0,%rax   /* ioctl return */
+
+	pushq	%rcx
+	retq
+
+1:
+	mov	$0xffffffffffffffff,%eax
+2:
+	pushq	%rax
+	movq	$158,%rax /* arch_prctl */
+	movq	$0x1002,%rdi /* ARCH_SET_FS */
+	movq	0x98(%rcx),%rsi
+	syscall
+	popq	%rax
+
+	movq	0x10(%rcx),%rbx
+	movq	0x28(%rcx),%rsi
+	movq	0x30(%rcx),%rdi
+	movq	0x38(%rcx),%rbp
+	movq	0x40(%rcx),%r8
+	movq	0x48(%rcx),%r9
+	movq	0x50(%rcx),%r10
+	movq	0x58(%rcx),%r11
+	movq	0x60(%rcx),%r12
+	movq	0x68(%rcx),%r13
+	movq	0x70(%rcx),%r14
+	movq	0x78(%rcx),%r15
+	movq	0x80(%rcx),%rdx
+	pushq	%rdx
+	popfq
+	movq	0x20(%rcx),%rdx
+	movq	0x18(%rcx),%rcx
+	retq
+
+/*
+arg: rdi, rsi, rdx, rcx, r8, r9
+ret: rax
+unsigned long
+compare_and_swap(unsigned long *addr, unsigned long old, unsigned long new);
+rdi: addr
+rsi: old
+rdx: new
+RET: old value
+ */
+.global compare_and_swap
+compare_and_swap:
+	movq	%rsi,%rax
+	lock
+	cmpxchgq	%rdx,0(%rdi)
+	retq
+
+/*
+unsigned int
+compare_and_swap_int(unsigned int *addr, unsigned int old, unsigned int new);
+ret: old value
+ */
+.global compare_and_swap_int
+compare_and_swap_int:
+	movl	%esi,%eax
+	lock
+	cmpxchgl	%edx,0(%rdi)
+	retq
+