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我有對imx6q鏈接代碼（皮質-A9）鏈接腳本：巨大的二進制文件的大小，而LD鏈接
OUTPUT_FORMAT("elf32-littlearm", "elf32-bigarm", "elf32-littlearm")
OUTPUT_ARCH(arm)
ENTRY(Reset_Handler)
/* SEARCH_DIR(.) */
GROUP(libgcc.a libc.a)
/* INPUT (crtbegin.o crti.o crtend.o crtn.o) */
MEMORY {
/* IROM (rwx) : ORIGIN = 0x00000000, LENGTH = 96K */
IRAM (rwx) : ORIGIN = 0x00900000, LENGTH = 256K
IRAM_MMU (rwx): ORIGIN = 0x00938000, LENGTH = 24K
IRAM_FREE(rwx): ORIGIN = 0x00907000, LENGTH = 196K
DDR (rwx) : ORIGIN = 0x10000000, LENGTH = 1024M
}
/* PROVIDE(__cs3_heap_start = _end); */
SECTIONS {
.vector (ORIGIN(IRAM) + LENGTH(IRAM) - 144):ALIGN (32) {
__ram_vectors_start = . ;
. += 72 ;
__ram_vectors_end = . ;
. = ALIGN (4);
} >IRAM
. = ORIGIN(DDR);
.text(.) :ALIGN(8) {
*(.entry)
*(.text)
/* __init_array_start = .; */
/* __init_array_end = .; */
. = ALIGN (4);
__text_end__ = .;
} >DDR
.data :ALIGN(8) {
*(.data .data.*)
__data_end__ = .;
}
.bss(__data_end__) : {
. = ALIGN (4);
__bss_start__ = .;
*(.shbss)
*(.bss .bss.* .gnu.linkonce.b.*)
*(COMMON)
__bss_end__ = .;
}
/* . += 10K; */
/* . += 5K; */
top_of_stacks = .;
. = ALIGN (4);
. += 8;
free_memory_start = .;
.mmu_page_table : {
__mmu_page_table_base__ = .;
. = ALIGN (16K);
. += 16K;
} >IRAM_MMU
_end = .;
__end = _end;
PROVIDE(end = .);
}
當我建的二進制文件的大小隻有6 KB。但我不能添加任何初始化變量。當我添加一個初始化變量時，二進制大小跳轉到〜246 MB。這是爲什麼？我試圖通過指定確切的位置並在數據段中提供> DDR來嘗試在文本部分的位置處鏈接數據段。儘管這似乎將二進制大小減少到6 KB，但二進制文件無法啓動。我怎麼能保持我的代碼在DDR和數據，BSS，堆棧和堆內部RAM本身，輕二進制大小？
我在另一個線程讀取，「在鏈接腳本使用內存標籤應該解決的內存浪費的問題」，這可怎麼辦呢？
linker script wastes my memory
普萊舍辦問別人需要什麼。我對連接腳本沒有任何經驗。請幫助
給定如下：沒有初始化的二進制數據的readelf --sections輸出，
There are 19 section headers, starting at offset 0xd804:
Section Headers:
[Nr] Name Type Addr Off Size ES Flg Lk Inf Al
[ 0] NULL 00000000 000000 000000 00 0 0 0
[ 1] .vector NOBITS 0093ff80 007f80 000048 00 WA 0 0 32
[ 2] .text PROGBITS 10000000 008000 0016fc 00 AX 0 0 8
[ 3] .text.vectors PROGBITS 100016fc 0096fc 000048 00 AX 0 0 4
[ 4] .text.proc PROGBITS 10001744 009744 000034 00 AX 0 0 4
[ 5] .bss NOBITS 0093ffc8 007fc8 000294 00 WA 0 0 4
[ 6] .mmu_page_table NOBITS 00938000 008000 004000 00 WA 0 0 1
[ 7] .comment PROGBITS 00000000 009778 00001f 01 MS 0 0 1
[ 8] .ARM.attributes ARM_ATTRIBUTES 00000000 009797 00003d 00 0 0 1
[ 9] .debug_aranges PROGBITS 00000000 0097d8 000108 00 0 0 8
[10] .debug_info PROGBITS 00000000 0098e0 0018a7 00 0 0 1
[11] .debug_abbrev PROGBITS 00000000 00b187 00056f 00 0 0 1
[12] .debug_line PROGBITS 00000000 00b6f6 00080e 00 0 0 1
[13] .debug_frame PROGBITS 00000000 00bf04 000430 00 0 0 4
[14] .debug_str PROGBITS 00000000 00c334 0013dd 01 MS 0 0 1
[15] .debug_ranges PROGBITS 00000000 00d718 000020 00 0 0 8
[16] .shstrtab STRTAB 00000000 00d738 0000cb 00 0 0 1
[17] .symtab SYMTAB 00000000 00dafc 000740 10 18 60 4
[18] .strtab STRTAB 00000000 00e23c 000511 00 0 0 1
Key to Flags:
W (write), A (alloc), X (execute), M (merge), S (strings)
I (info), L (link order), G (group), T (TLS), E (exclude), x (unknown)
O (extra OS processing required) o (OS specific), p (processor specific)
，並給出初始化的數據是二進制的readelf --sections輸出，
There are 20 section headers, starting at offset 0xd82c:
Section Headers:
[Nr] Name Type Addr Off Size ES Flg Lk Inf Al
[ 0] NULL 00000000 000000 000000 00 0 0 0
[ 1] .vector NOBITS 0093ff80 007f80 000048 00 WA 0 0 32
[ 2] .text PROGBITS 10000000 008000 0016fc 00 AX 0 0 8
[ 3] .text.vectors PROGBITS 100016fc 0096fc 000048 00 AX 0 0 4
[ 4] .text.proc PROGBITS 10001744 009744 000034 00 AX 0 0 4
[ 5] .data PROGBITS 0093ffc8 007fc8 000004 00 WA 0 0 8
[ 6] .bss NOBITS 0093ffcc 007fcc 000294 00 WA 0 0 4
[ 7] .mmu_page_table NOBITS 00938000 008000 004000 00 WA 0 0 1
[ 8] .comment PROGBITS 00000000 009778 00001f 01 MS 0 0 1
[ 9] .ARM.attributes ARM_ATTRIBUTES 00000000 009797 00003d 00 0 0 1
[10] .debug_aranges PROGBITS 00000000 0097d8 000108 00 0 0 8
[11] .debug_info PROGBITS 00000000 0098e0 0018b6 00 0 0 1
[12] .debug_abbrev PROGBITS 00000000 00b196 000580 00 0 0 1
[13] .debug_line PROGBITS 00000000 00b716 00080e 00 0 0 1
[14] .debug_frame PROGBITS 00000000 00bf24 000430 00 0 0 4
[15] .debug_str PROGBITS 00000000 00c354 0013dd 01 MS 0 0 1
[16] .debug_ranges PROGBITS 00000000 00d738 000020 00 0 0 8
[17] .shstrtab STRTAB 00000000 00d758 0000d1 00 0 0 1
[18] .symtab SYMTAB 00000000 00db4c 000770 10 19 62 4
[19] .strtab STRTAB 00000000 00e2bc 000513 00 0 0 1
Key to Flags:
W (write), A (alloc), X (execute), M (merge), S (strings)
I (info), L (link order), G (group), T (TLS), E (exclude), x (unknown)
O (extra OS processing required) o (OS specific), p (processor specific)
希望這就夠了...！
注意：我正在使用arm-none-eabi-gcc進行鏈接。
你可以發佈'readelf --sections'的輸出給你的二進制文件嗎？ –
輸出已添加。在第二種情況下，二進制文件的大小在前一個文件中被編譯爲6 KB時變成了〜246MB .... – Ajeesh
很明顯（和類似的問題（或Q/A）在SO上）。 'IRAM LENGTH = 256K'帶有DDR（256MB） - IRAM（9MB）〜= 256MB'，二進制增加到246MB。 [閱讀關於VMA/LMA]（https://sourceware.org/binutils/docs/ld/Output-Section-LMA.html）並將其用作搜索術語。A ** BINARY **必須是一個連續的二進制塊！沒有部分信息。你看到這個問題嗎？ gnu LD腳本有'AT'類型的指令，LMA/VMA可以解決這個問題。 –