esp-idf/components/bootloader/subproject/main/ld/esp32s2/bootloader.ld

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/*
* SPDX-FileCopyrightText: 2021-2022 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
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/* Simplified memory map for the bootloader.
* Make sure the bootloader can load into main memory without overwriting itself.
*/
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MEMORY
{
iram_seg (RWX) : org = 0x4004c000, len = 0x4000 /* SRAM Block 13 */
iram_loader_seg (RWX) : org = 0x40050000, len = 0x6000 /* SRAM Block 14 & part of 15 */
dram_seg (RW) : org = 0x3FFE6000, len = 0x4B00 /* Part SRAM Blocks 15 & 16, ROM static buffer starts at end of this region (reclaimed after app runs) */
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}
/* Default entry point: */
ENTRY(call_start_cpu0);
SECTIONS
{
.iram_loader.text :
{
. = ALIGN (16);
_loader_text_start = ABSOLUTE(.);
*(.stub .gnu.warning .gnu.linkonce.literal.* .gnu.linkonce.t.*.literal .gnu.linkonce.t.*)
*(.iram1 .iram1.*) /* catch stray IRAM_ATTR */
*liblog.a:(.literal .text .literal.* .text.*)
*libgcc.a:(.literal .text .literal.* .text.*)
*libbootloader_support.a:bootloader_clock_loader.*(.literal .text .literal.* .text.*)
*libbootloader_support.a:bootloader_common_loader.*(.literal .text .literal.* .text.*)
*libbootloader_support.a:bootloader_flash.*(.literal .text .literal.* .text.*)
*libbootloader_support.a:bootloader_random.*(.literal .text .literal.* .text.*)
*libbootloader_support.a:bootloader_random*.*(.literal.bootloader_random_disable .text.bootloader_random_disable)
*libesp_common.a:fpga_overrides.*(.literal.bootloader_fill_random .text.bootloader_fill_random)
*libbootloader_support.a:bootloader_efuse.*(.literal .text .literal.* .text.*)
*libbootloader_support.a:bootloader_utility.*(.literal .text .literal.* .text.*)
*libbootloader_support.a:bootloader_sha.*(.literal .text .literal.* .text.*)
*libbootloader_support.a:bootloader_console_loader.*(.literal .text .literal.* .text.*)
*libbootloader_support.a:bootloader_panic.*(.literal .text .literal.* .text.*)
*libbootloader_support.a:bootloader_soc.*(.literal .text .literal.* .text.*)
*libbootloader_support.a:esp_image_format.*(.literal .text .literal.* .text.*)
*libbootloader_support.a:flash_encrypt.*(.literal .text .literal.* .text.*)
*libbootloader_support.a:flash_encryption_secure_features.*(.literal .text .literal.* .text.*)
*libbootloader_support.a:flash_partitions.*(.literal .text .literal.* .text.*)
*libbootloader_support.a:secure_boot.*(.literal .text .literal.* .text.*)
*libbootloader_support.a:secure_boot_secure_features.*(.literal .text .literal.* .text.*)
*libbootloader_support.a:secure_boot_signatures_bootloader.*(.literal .text .literal.* .text.*)
*libmicro-ecc.a:*.*(.literal .text .literal.* .text.*)
*libspi_flash.a:*.*(.literal .text .literal.* .text.*)
*libhal.a:wdt_hal_iram.*(.literal .text .literal.* .text.*)
*libhal.a:mmu_hal.*(.literal .text .literal.* .text.*)
*libhal.a:cache_hal.*(.literal .text .literal.* .text.*)
*libhal.a:efuse_hal.*(.literal .text .literal.* .text.*)
*libesp_hw_support.a:rtc_clk.*(.literal .text .literal.* .text.*)
*libesp_hw_support.a:rtc_time.*(.literal .text .literal.* .text.*)
*libesp_hw_support.a:regi2c_ctrl.*(.literal .text .literal.* .text.*)
*libefuse.a:*.*(.literal .text .literal.* .text.*)
*libesp_rom.a:esp_rom_regi2c.*(.literal .text .literal.* .text.*)
*(.fini.literal)
*(.fini)
*(.gnu.version)
_loader_text_end = ABSOLUTE(.);
} > iram_loader_seg
.iram.text :
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{
. = ALIGN (16);
*(.entry.text)
*(.init.literal)
*(.init)
} > iram_seg
/* Shared RAM */
.dram0.bss (NOLOAD) :
{
. = ALIGN (8);
_dram_start = ABSOLUTE(.);
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_bss_start = ABSOLUTE(.);
*(.dynsbss)
*(.sbss)
*(.sbss.*)
*(.gnu.linkonce.sb.*)
*(.scommon)
*(.sbss2)
*(.sbss2.*)
*(.gnu.linkonce.sb2.*)
*(.dynbss)
*(.bss)
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*(.bss.*)
*(.gnu.linkonce.b.*)
*(COMMON)
. = ALIGN (8);
_bss_end = ABSOLUTE(.);
} >dram_seg
.dram0.data :
{
_data_start = ABSOLUTE(.);
*(.data)
*(.data.*)
*(.gnu.linkonce.d.*)
*(.data1)
*(.sdata)
*(.sdata.*)
*(.gnu.linkonce.s.*)
*(.gnu.linkonce.s2.*)
*(.jcr)
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_data_end = ABSOLUTE(.);
} >dram_seg
.dram0.rodata :
{
_rodata_start = ABSOLUTE(.);
*(.rodata)
*(.rodata.*)
*(.gnu.linkonce.r.*)
*(.rodata1)
*(.sdata2 .sdata2.*)
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__XT_EXCEPTION_TABLE_ = ABSOLUTE(.);
*(.xt_except_table)
*(.gcc_except_table)
*(.gnu.linkonce.e.*)
*(.gnu.version_r)
*(.eh_frame)
. = (. + 3) & ~ 3;
/* C++ constructor and destructor tables, properly ordered: */
__init_array_start = ABSOLUTE(.);
KEEP (*crtbegin.*(.ctors))
KEEP (*(EXCLUDE_FILE (*crtend.*) .ctors))
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KEEP (*(SORT(.ctors.*)))
KEEP (*(.ctors))
__init_array_end = ABSOLUTE(.);
KEEP (*crtbegin.*(.dtors))
KEEP (*(EXCLUDE_FILE (*crtend.*) .dtors))
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KEEP (*(SORT(.dtors.*)))
KEEP (*(.dtors))
/* C++ exception handlers table: */
__XT_EXCEPTION_DESCS_ = ABSOLUTE(.);
*(.xt_except_desc)
*(.gnu.linkonce.h.*)
__XT_EXCEPTION_DESCS_END__ = ABSOLUTE(.);
*(.xt_except_desc_end)
*(.dynamic)
*(.gnu.version_d)
_rodata_end = ABSOLUTE(.);
/* Literals are also RO data. */
_lit4_start = ABSOLUTE(.);
*(*.lit4)
*(.lit4.*)
*(.gnu.linkonce.lit4.*)
_lit4_end = ABSOLUTE(.);
. = ALIGN(4);
_dram_end = ABSOLUTE(.);
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} >dram_seg
.iram.text :
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{
_stext = .;
_text_start = ABSOLUTE(.);
*(.literal .text .literal.* .text.* .stub .gnu.warning .gnu.linkonce.literal.* .gnu.linkonce.t.*.literal .gnu.linkonce.t.*)
*(.iram .iram.*) /* catch stray IRAM_ATTR */
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*(.fini.literal)
*(.fini)
*(.gnu.version)
/** CPU will try to prefetch up to 16 bytes of
* of instructions. This means that any configuration (e.g. MMU, PMS) must allow
* safe access to up to 16 bytes after the last real instruction, add
* dummy bytes to ensure this
*/
. += 16;
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_text_end = ABSOLUTE(.);
_etext = .;
} > iram_seg
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/** This section will be used by the debugger and disassembler to get more information
* about raw data present in the code.
* Indeed, it may be required to add some padding at some points in the code
* in order to align a branch/jump destination on a particular bound.
* Padding these instructions will generate null bytes that shall be
* interpreted as data, and not code by the debugger or disassembler.
* This section will only be present in the ELF file, not in the final binary
* For more details, check GCC-212
*/
.xt.prop 0 :
{
KEEP (*(.xt.prop .gnu.linkonce.prop.*))
}
.xt.lit 0 :
{
KEEP (*(.xt.lit .gnu.linkonce.p.*))
}
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}