first usable version of kernel and commands

After an year of hard work, this is a first "usable" version of Jehanne.

qa/lib/c/asmscall.c

@@ -0,0 +1,87 @@
+/*
+ * This file is part of Jehanne.
+ *
+ * Copyright (C) 2016 Giacomo Tesio <giacomo@tesio.it>
+ *
+ * Jehanne is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 2 of the License.
+ *
+ * Jehanne is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Jehanne.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <u.h>
+#include <libc.h>
+
+int verbose = 1;
+
+#define asm_nsec() ({ \
+	register long __ret asm ("rax"); \
+	__asm__ __volatile__ ( \
+		"syscall" \
+		: "=r" (__ret) \
+		: "0"(19) \
+		: "cc", "rcx", "r11", "memory" \
+	); \
+	__ret; })
+
+#define asm_mount(/* int */ fd, /* int */ afd, /* char* */ old, /* int */ flag, /* char* */ aname, /* int */ mdev) ({ \
+	register long r10 asm("r10") = flag; \
+	register long r8 asm("r8") = (uintptr_t)aname; \
+	register long r9 asm("r9") = mdev; \
+	register int __ret asm ("eax"); \
+	__asm__ __volatile__ ( \
+		"syscall" \
+		: "=r" (__ret) \
+		: "0"(16), "D"(fd), "S"(afd), "d"(old), "r"(r10), "r"(r8), "r"(r9) \
+		: "cc", "rcx", "r11", "memory" \
+	); \
+	__ret; })
+
+/*
+long
+asm_nsec(void)
+{
+	register int *p1 asm ("r0");
+	register int *p2 asm ("r1");
+	register int *result asm ("r0");
+	asm ("sysint" : "=r" (result) : "0" (p1), "r" (p2));
+	return result ;
+}
+*/
+
+void
+main(void)
+{
+	int ret = 0; // success
+	uint64_t start, end;
+	char *msg;
+
+	start = asm_nsec();
+	sleep(1);
+	end = asm_nsec();
+
+	if (end <= start)
+		ret = 1;
+
+	if (verbose)
+		print("nsec: start %llx, end %llx\n", start, end);
+	if(ret){
+		msg = smprint("nsec: FAIL: start %llx end %llx",
+			start, end);
+		print("%s\n", msg);
+		exits(msg);
+	}
+
+	int fd;
+	fd = open("#|", ORDWR);
+	asm_mount(fd, -1, "/tmp", MREPL, "", 'M');
+
+	print("PASS\n");
+	exits("PASS");
+}