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mcuboot
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imgtool: Add complete trailer to HEX images 

When generating HEX output, instead of just adding the `magic`, also add
the whole trailer (with erased value). This allows for HEX writing tools
to erase the trailer region, avoiding possible issues when garbage
exists there.

Signed-off-by: Fabio Utzig <utzig@apache.org>
This commit is contained in:
Fabio Utzig 2019-10-17 11:14:33 -03:00 committed by Fabio Utzig
parent 9117fded47
commit 2269f47eb4
1 changed files with 7 additions and 3 deletions
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10
scripts/imgtool/image.py
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@ -179,9 +179,13 @@ class Image():
self.base_addr = hex_addr self.base_addr = hex_addr
h.frombytes(bytes=self.payload, offset=self.base_addr) h.frombytes(bytes=self.payload, offset=self.base_addr)
if self.pad: if self.pad:
magic_addr = (self.base_addr + self.slot_size) - \ trailer_size = self._trailer_size(self.align, self.max_sectors,
len(boot_magic) self.overwrite_only,
h.puts(magic_addr, boot_magic) self.enckey)
trailer_addr = (self.base_addr + self.slot_size) - trailer_size
padding = bytes([self.erased_val] *
(trailer_size - len(boot_magic))) + boot_magic
h.puts(trailer_addr, padding)
h.tofile(path, 'hex') h.tofile(path, 'hex')
else: else:
if self.pad: if self.pad: