user: implement mlibc as the libc, finally.

It's finally done..

Signed-off-by: kaguya <vpshinomiya@protonmail.com>

user/include/mlibc/sysdeps/linux/x86/cp_syscall.S

@@ -0,0 +1,42 @@
+
+.section .text
+.global __mlibc_do_asm_cp_syscall
+.global __mlibc_syscall_begin
+.global __mlibc_syscall_end
+.type __mlibc_do_asm_cp_syscall, "function"
+__mlibc_do_asm_cp_syscall:
+	push %ebx
+	push %esi
+	push %edi
+	push %ebp
+	; mov 16(%esp), %eax
+	mov 24(%esp), %ebx
+	mov 28(%esp), %ecx
+	mov 32(%esp), %edx
+	mov 36(%esp), %esi
+	mov 40(%esp), %edi
+	mov 44(%esp), %ebp
+	mov %gs:0x18, %al
+__mlibc_syscall_begin:
+	/* tcbCancelEnableBit && tcbCancelTriggerBit */
+	and $((1 << 0) | (1 << 2)), %al
+	cmp $((1 << 0) | (1 << 2)), %al
+	je cancel
+	mov 20(%esp), %eax
+	int $0x80
+__mlibc_syscall_end:
+	pop %ebp
+	pop %edi
+	pop %esi
+	pop %ebx
+	ret
+
+cancel:
+	pop %ebp
+	pop %edi
+	pop %esi
+	pop %ebx
+	call __mlibc_do_cancel@PLT
+	hlt
+
+.section .note.GNU-stack,"",%progbits