3e0ac4db79
Allows you to move the partition table, it gives more space for the bootloader. Added a new utility - parttool.py. This utility can search for the offset and/or size of the partitions by name and type/subtype. Use for getting APP_OFFSET and PHY_DATA_OFFSET. The linker(esp32.bootloader.ld) made changes that allow you to write a custom bootloader code more. TW14125
158 lines
4 KiB
Plaintext
158 lines
4 KiB
Plaintext
/*
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Linker file used to link the bootloader.
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*/
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/* Simplified memory map for the bootloader
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The main purpose is to make sure the bootloader can load into main memory
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without overwriting itself.
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*/
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MEMORY
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{
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/* I/O */
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dport0_seg (RW) : org = 0x3FF00000, len = 0x10
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/* IRAM POOL1, used for APP CPU cache. Bootloader runs from here during the final stage of loading the app because APP CPU is still held in reset, the main app enables APP CPU cache */
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iram_loader_seg (RWX) : org = 0x40078000, len = 0x8000 /* 32KB, APP CPU cache */
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iram_seg (RWX) : org = 0x40080000, len = 0x10000 /* 64KB, IRAM */
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/* 64k at the end of DRAM, after ROM bootloader stack */
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dram_seg (RW) : org = 0x3FFF0000, len = 0x10000
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}
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/* Default entry point: */
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ENTRY(call_start_cpu0);
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SECTIONS
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{
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.iram_loader.text :
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{
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. = ALIGN (16);
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_stext = .;
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_text_start = ABSOLUTE(.);
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*(.stub .gnu.warning .gnu.linkonce.literal.* .gnu.linkonce.t.*.literal .gnu.linkonce.t.*)
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*(.iram1 .iram1.*) /* catch stray IRAM_ATTR */
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*liblog.a:(.literal .text .literal.* .text.*)
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*libgcc.a:(.literal .text .literal.* .text.*)
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*libbootloader_support.a:bootloader_utility.o(.literal .text .literal.* .text.*)
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*libbootloader_support.a:esp_image_format.o(.literal .text .literal.* .text.*)
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*libbootloader_support.a:bootloader_random.o(.literal .text .literal.* .text.*)
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*libbootloader_support.a:bootloader_flash.o(.literal .text .literal.* .text.*)
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*libbootloader_support.a:flash_partitions.o(.literal .text .literal.* .text.*)
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*libbootloader_support.a:bootloader_sha.o(.literal .text .literal.* .text.*)
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*(.fini.literal)
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*(.fini)
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*(.gnu.version)
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_text_end = ABSOLUTE(.);
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_etext = .;
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} > iram_loader_seg
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.iram.text :
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{
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. = ALIGN (16);
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*(.entry.text)
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*(.init.literal)
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*(.init)
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} > iram_seg
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/* Shared RAM */
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.dram0.bss (NOLOAD) :
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{
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. = ALIGN (8);
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_bss_start = ABSOLUTE(.);
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*(.dynsbss)
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*(.sbss)
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*(.sbss.*)
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*(.gnu.linkonce.sb.*)
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*(.scommon)
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*(.sbss2)
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*(.sbss2.*)
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*(.gnu.linkonce.sb2.*)
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*(.dynbss)
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*(.bss)
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*(.bss.*)
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*(.gnu.linkonce.b.*)
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*(COMMON)
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. = ALIGN (8);
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_bss_end = ABSOLUTE(.);
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} >dram_seg
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.dram0.data :
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{
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_data_start = ABSOLUTE(.);
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*(.data)
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*(.data.*)
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*(.gnu.linkonce.d.*)
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*(.data1)
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*(.sdata)
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*(.sdata.*)
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*(.gnu.linkonce.s.*)
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*(.sdata2)
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*(.sdata2.*)
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*(.gnu.linkonce.s2.*)
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*(.jcr)
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_data_end = ABSOLUTE(.);
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} >dram_seg
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.dram0.rodata :
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{
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_rodata_start = ABSOLUTE(.);
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*(.rodata)
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*(.rodata.*)
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*(.gnu.linkonce.r.*)
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*(.rodata1)
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__XT_EXCEPTION_TABLE_ = ABSOLUTE(.);
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*(.xt_except_table)
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*(.gcc_except_table)
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*(.gnu.linkonce.e.*)
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*(.gnu.version_r)
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*(.eh_frame)
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. = (. + 3) & ~ 3;
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/* C++ constructor and destructor tables, properly ordered: */
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__init_array_start = ABSOLUTE(.);
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KEEP (*crtbegin.o(.ctors))
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KEEP (*(EXCLUDE_FILE (*crtend.o) .ctors))
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KEEP (*(SORT(.ctors.*)))
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KEEP (*(.ctors))
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__init_array_end = ABSOLUTE(.);
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KEEP (*crtbegin.o(.dtors))
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KEEP (*(EXCLUDE_FILE (*crtend.o) .dtors))
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KEEP (*(SORT(.dtors.*)))
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KEEP (*(.dtors))
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/* C++ exception handlers table: */
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__XT_EXCEPTION_DESCS_ = ABSOLUTE(.);
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*(.xt_except_desc)
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*(.gnu.linkonce.h.*)
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__XT_EXCEPTION_DESCS_END__ = ABSOLUTE(.);
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*(.xt_except_desc_end)
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*(.dynamic)
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*(.gnu.version_d)
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_rodata_end = ABSOLUTE(.);
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/* Literals are also RO data. */
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_lit4_start = ABSOLUTE(.);
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*(*.lit4)
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*(.lit4.*)
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*(.gnu.linkonce.lit4.*)
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_lit4_end = ABSOLUTE(.);
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. = ALIGN(4);
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_heap_start = ABSOLUTE(.);
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} >dram_seg
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.iram.text :
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{
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_stext = .;
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_text_start = ABSOLUTE(.);
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*(.literal .text .literal.* .text.* .stub .gnu.warning .gnu.linkonce.literal.* .gnu.linkonce.t.*.literal .gnu.linkonce.t.*)
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*(.iram .iram.*) /* catch stray IRAM_ATTR */
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*(.fini.literal)
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*(.fini)
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*(.gnu.version)
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_text_end = ABSOLUTE(.);
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_etext = .;
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} > iram_seg
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}
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