bdscr_t blocks[256]; // 256 * 32 bytes = 8KB Use:
gcc -DNDEBUG -ffunction-sections -fdata-sections ... ld --gc-sections -o output.elf input.o Or manually strip after linking:
Reduced alignment to 4 bytes, changed static array to pointer + malloc, and moved non-critical descriptors to a compressed filesystem.
Always audit your linker scripts and descriptor data structures – especially when porting code across different flash architectures or toolchains.
objcopy --remove-section=.bdscr firmware.elf stripped.elf Scenario: A Zigbee IoT hub firmware had a .bdscr section of 64KB, but only 2KB was actually used.
Linker script reserved a 64KB aligned block for OTA descriptor storage due to a legacy flash driver requirement.
.bdscr : ALIGN(4) KEEP(*(.bdscr)) > FLASH Instead of:
bdscr_t blocks[256]; // 256 * 32 bytes = 8KB Use:
gcc -DNDEBUG -ffunction-sections -fdata-sections ... ld --gc-sections -o output.elf input.o Or manually strip after linking: bloat bdscr
Reduced alignment to 4 bytes, changed static array to pointer + malloc, and moved non-critical descriptors to a compressed filesystem. bdscr_t blocks[256]; // 256 * 32 bytes =
Always audit your linker scripts and descriptor data structures – especially when porting code across different flash architectures or toolchains. FLASH Instead of:
objcopy --remove-section=.bdscr firmware.elf stripped.elf Scenario: A Zigbee IoT hub firmware had a .bdscr section of 64KB, but only 2KB was actually used.
Linker script reserved a 64KB aligned block for OTA descriptor storage due to a legacy flash driver requirement.
.bdscr : ALIGN(4) KEEP(*(.bdscr)) > FLASH Instead of:
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