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stm32/mboot: Fix alignment of packed final buffer.

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Once all the firmware has been flashed and the final signatures checked,
mboot writes the "all good" byte into the header of the application.  This
step uses the buffer firmware_head which, if unaligned in the build, fails
when cast to a uint64_t* in flash.c.

Signed-off-by: Andrew Leech <andrew.leech@planetinnovation.com.au>
This commit is contained in:
Andrew Leech 2023-05-11 15:45:53 +10:00 committed by Damien George
parent ad216be5f1
commit f03ac04321
1 changed files with 1 additions and 1 deletions
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2
ports/stm32/mboot/pack.c
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@ -59,7 +59,7 @@ static uint8_t uncompressed_buf[MBOOT_PACK_GZIP_BUFFER_SIZE] __attribute__((alig
// Buffer to hold the start of the firmware, which is only written once the
// entire firmware is validated. This is 8 bytes due to STM32WB MCUs requiring
// that a double-word write to flash can only be done once (due to ECC).
static uint8_t firmware_head[8];
static uint8_t firmware_head[8] __attribute__((aligned(8)));
// Flag to indicate that firmware_head contains valid data.
static bool firmware_head_valid;