ams-mtc: add ams-mtc

Source/Atmosphere-MTC-Unlock/mesosphere/kernel/source/arch/arm64/svc/kern_svc_tables_asm.s

@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) 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/>.
+ */
+
+/* ams::kern::svc::PatchSvcTableEntry(void (* const*)(), unsigned int, void (*)()) */
+.section    .text._ZN3ams4kern3svc18PatchSvcTableEntryEPKPFvvEjS3_, "ax", %progbits
+.global     _ZN3ams4kern3svc18PatchSvcTableEntryEPKPFvvEjS3_
+.type       _ZN3ams4kern3svc18PatchSvcTableEntryEPKPFvvEjS3_, %function
+_ZN3ams4kern3svc18PatchSvcTableEntryEPKPFvvEjS3_:
+    /* This function violates const correctness by design, to patch the svc tables. */
+    /* The svc tables live in .rodata (.rel.ro), but must be patched by initial constructors */
+    /* to support firmware-specific table entries. */
+    mov w1, w1
+    str x2, [x0, x1, lsl #3]
+    ret