Refactor ALL the things + enable LTO

bootloader/reloc.S

@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2018 naehrwert
+ *
+ * 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/>.
+ */
+
+/*
+ * TODO: the placement of the relocator is a bit fragile atm, maybe we
+ *       should include it in start.S and copy it to some known good
+ *       place in IRAM instead. Basically we want it as far back atm
+ *       as it might be overwritten during relocation.
+ */
+
+.section .text.reloc
+.arm
+
+.globl _reloc_ipl
+.type _reloc_ipl, %function
+_reloc_ipl:
+	LDMIA R0!, {R4-R7}
+	STMIA R1!, {R4-R7}
+	SUBS R2, #0x10
+	BNE _reloc_ipl
+	BX R3