fastflash: Link bootloader that runs from RAM

fastflash/Makefile

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+APPVER = fastflash
+
+NAME  = bootloader
+
+OBJS += bootloader.o
+OBJS += signatures.o
+OBJS += usb.o
+
+OBJS += ../vendor/trezor-crypto/sha2.o
+
+include ../Makefile.include
+
+CFLAGS += -I../bootloader

fastflash/bootloader.c

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+../bootloader/bootloader.c

fastflash/signatures.c

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+/*
+ * This file is part of the TREZOR project.
+ *
+ * Copyright (C) 2017 Saleem Rashid <trezor@saleemrashid.com>
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdbool.h>
+#include <stdint.h>
+
+int signatures_ok(uint8_t *store_hash)
+{
+	(void) store_hash;
+
+	return false;
+}

fastflash/usb.c

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+../bootloader/usb.c

memory_app_fastflash.ld

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+/* STM32F205RE - 512K Flash, 128K RAM */
+MEMORY
+{
+	rom (rx)  : ORIGIN = 0x20000000, LENGTH = 20K
+	ram (rwx) : ORIGIN = ORIGIN(rom) + LENGTH(rom),
+		    LENGTH = 128K - LENGTH(rom)
+}
+
+INCLUDE libopencm3_stm32f2.ld