exo2: rename exosphere2 -> exosphere

exosphere/program/source/boot/secmon_crt0.s

@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2018-2020 Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+.section    .crt0.text.start, "ax", %progbits
+.align      6
+.global     _start
+_start:
+    /* mask all interrupts */
+    msr daifset, #0xF
+
+    /* Set the stack pointer to a temporary location. */
+    ldr x20, =0x7C010800
+    mov sp, x20
+
+    /* Initialize all memory to expected state. */
+    ldr x0, =__bss_start__
+    ldr x1, =__bss_end__
+    ldr x2, =__boot_bss_start__
+    ldr x3, =__boot_bss_end__
+    bl _ZN3ams6secmon4boot10InitializeEmmmm
+
+    /* Jump to the first bit of virtual code. */
+    ldr x16, =_ZN3ams6secmon5StartEv
+    br x16