memory management - Is .bss not a part of final ELF? -


here below linker descriptor file input gnu ld build u-boot elf embedded system

output_format("elf32-littlearm", "elf32-littlearm", "elf32-littlearm") output_arch(arm) entry(_start) sections {     . = 0x00000000;      . = align(4);     .text   :     {         arch/arm/cpu/armv7/start.o  (.text)         *(.text)     }      . = align(4);     .rodata : { *(sort_by_alignment(sort_by_name(.rodata*))) }      . = align(4);     .data : {         *(.data)     }      . = align(4);      . = .;     __u_boot_cmd_start = .;     .u_boot_cmd : { *(.u_boot_cmd) }     __u_boot_cmd_end = .;      . = config_sys_nand_u_boot_size + config_sys_text_base;     . = align(4);      .rel.dyn : {         __rel_dyn_start = .;         *(.rel*)         __rel_dyn_end = .;     }      .dynsym : {         __dynsym_start = .;         *(.dynsym)     }      .bss : {         __bss_start = .;         *(.bss)          . = align(4);         _end = .;     }      /discard/ : { *(.dynstr*) }     /discard/ : { *(.dynamic*) }     /discard/ : { *(.plt*) }     /discard/ : { *(.interp*) }     /discard/ : { *(.gnu*) } }

and macro config_sys_nand_u_boot_size option of final size of u-boot, , config_sys_text_base holds base address of text, doubt why .bss been placed outside elf allowed size ??

was been put out of elf , no ! when have done objdump of elf present in it, see pic below

enter image description here


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