/* * SPDX-FileCopyrightText: 2021 Espressif Systems (Shanghai) CO LTD * * SPDX-License-Identifier: Apache-2.0 */ #include "ld.common" /* Default entry point: */ ENTRY(call_start_cpu0); SECTIONS { /* RTC fast memory holds RTC wake stub code, including from any source file named rtc_wake_stub*.c */ .rtc.text : { . = ALIGN(4); mapping[rtc_text] *rtc_wake_stub*.*(.literal .text .literal.* .text.*) _rtc_text_end = ABSOLUTE(.); } > rtc_iram_seg /* This section is required to skip rtc.text area because rtc_iram_seg and rtc_data_seg are reflect the same address space on different buses. */ .rtc.dummy : { _rtc_dummy_start = ABSOLUTE(.); _rtc_fast_start = ABSOLUTE(.); . = SIZEOF(.rtc.text); _rtc_dummy_end = ABSOLUTE(.); } > rtc_data_seg /* This section located in RTC FAST Memory area. It holds data marked with RTC_FAST_ATTR attribute. See the file "esp_attr.h" for more information. */ .rtc.force_fast : { . = ALIGN(4); _rtc_force_fast_start = ABSOLUTE(.); mapping[rtc_force_fast] *(.rtc.force_fast .rtc.force_fast.*) . = ALIGN(4) ; _rtc_force_fast_end = ABSOLUTE(.); } > rtc_data_seg /* RTC data section holds RTC wake stub data/rodata, including from any source file named rtc_wake_stub*.c and the data marked with RTC_DATA_ATTR, RTC_RODATA_ATTR attributes. The memory location of the data is dependent on CONFIG_ESP32_RTCDATA_IN_FAST_MEM option. */ .rtc.data : { _rtc_data_start = ABSOLUTE(.); mapping[rtc_data] *rtc_wake_stub*.*(.data .rodata .data.* .rodata.*) _rtc_data_end = ABSOLUTE(.); } > rtc_data_location /* RTC bss, from any source file named rtc_wake_stub*.c */ .rtc.bss (NOLOAD) : { _rtc_bss_start = ABSOLUTE(.); *rtc_wake_stub*.*(.bss .bss.*) *rtc_wake_stub*.*(COMMON) mapping[rtc_bss] _rtc_bss_end = ABSOLUTE(.); } > rtc_data_location /* This section holds data that should not be initialized at power up and will be retained during deep sleep. User data marked with RTC_NOINIT_ATTR will be placed into this section. See the file "esp_attr.h" for more information. The memory location of the data is dependent on CONFIG_ESP32_RTCDATA_IN_FAST_MEM option. */ .rtc_noinit (NOLOAD): { . = ALIGN(4); _rtc_noinit_start = ABSOLUTE(.); *(.rtc_noinit .rtc_noinit.*) . = ALIGN(4) ; _rtc_noinit_end = ABSOLUTE(.); } > rtc_data_location /* This section located in RTC SLOW Memory area. It holds data marked with RTC_SLOW_ATTR attribute. See the file "esp_attr.h" for more information. */ .rtc.force_slow : { . = ALIGN(4); _rtc_force_slow_start = ABSOLUTE(.); *(.rtc.force_slow .rtc.force_slow.*) . = ALIGN(4) ; _rtc_force_slow_end = ABSOLUTE(.); } > rtc_slow_seg /** * This section holds RTC FAST data that should have fixed addresses. * The data are not initialized at power-up and are retained during deep sleep. */ .rtc_fast_reserved (NOLOAD): { . = ALIGN(4); _rtc_fast_reserved_start = ABSOLUTE(.); /* New data can only be added here to ensure existing data are not moved. Because data have adhered to the end of the segment and code is relied on it. >> put new data here << */ KEEP(*(.bootloader_data_rtc_mem .bootloader_data_rtc_mem.*)) _rtc_fast_reserved_end = ABSOLUTE(.); } > rtc_fast_reserved_seg _rtc_fast_reserved_length = _rtc_fast_reserved_end - _rtc_fast_reserved_start; ASSERT((_rtc_fast_reserved_length <= LENGTH(rtc_fast_reserved_seg)), "RTC FAST reserved segment data does not fit.") /** * This section holds RTC SLOW data that should have fixed addresses. * The data are not initialized at power-up and are retained during deep sleep. */ .rtc_slow_reserved (NOLOAD): { . = ALIGN(4); _rtc_slow_reserved_start = ABSOLUTE(.); /* New data can only be added here to ensure existing data are not moved. Because data have adhered to the end of the segment and code is relied on it. >> put new data here << */ *(.rtc_timer_data_in_rtc_mem .rtc_timer_data_in_rtc_mem.*) _rtc_slow_reserved_end = ABSOLUTE(.); } > rtc_slow_reserved_seg _rtc_slow_reserved_length = _rtc_slow_reserved_end - _rtc_slow_reserved_start; _rtc_reserved_length = _rtc_slow_reserved_length; ASSERT((_rtc_slow_reserved_length <= LENGTH(rtc_slow_reserved_seg)), "RTC SLOW reserved segment data does not fit.") /* Get size of rtc slow data based on rtc_data_location alias */ _rtc_slow_length = (ORIGIN(rtc_slow_seg) == ORIGIN(rtc_data_location)) ? (_rtc_force_slow_end - _rtc_data_start) : (_rtc_force_slow_end - _rtc_force_slow_start); _rtc_fast_length = (ORIGIN(rtc_slow_seg) == ORIGIN(rtc_data_location)) ? (_rtc_force_fast_end - _rtc_fast_start) : (_rtc_noinit_end - _rtc_fast_start); ASSERT((_rtc_slow_length <= LENGTH(rtc_slow_seg)), "RTC_SLOW segment data does not fit.") ASSERT((_rtc_fast_length <= LENGTH(rtc_data_seg)), "RTC_FAST segment data does not fit.") /* Send .iram0 code to iram */ .iram0.vectors : { _iram_start = ABSOLUTE(.); /* Vectors go to IRAM */ _vector_table = ABSOLUTE(.); /* Vectors according to builds/RF-2015.2-win32/esp108_v1_2_s5_512int_2/config.html */ . = 0x0; KEEP(*(.WindowVectors.text)); . = 0x180; KEEP(*(.Level2InterruptVector.text)); . = 0x1c0; KEEP(*(.Level3InterruptVector.text)); . = 0x200; KEEP(*(.Level4InterruptVector.text)); . = 0x240; KEEP(*(.Level5InterruptVector.text)); . = 0x280; KEEP(*(.DebugExceptionVector.text)); . = 0x2c0; KEEP(*(.NMIExceptionVector.text)); . = 0x300; KEEP(*(.KernelExceptionVector.text)); . = 0x340; KEEP(*(.UserExceptionVector.text)); . = 0x3C0; KEEP(*(.DoubleExceptionVector.text)); . = 0x400; _invalid_pc_placeholder = ABSOLUTE(.); *(.*Vector.literal) *(.UserEnter.literal); *(.UserEnter.text); . = ALIGN (16); *(.entry.text) *(.init.literal) *(.init) _init_end = ABSOLUTE(.); } > iram0_0_seg .iram0.text : { /* Code marked as runnning out of IRAM */ _iram_text_start = ABSOLUTE(.); mapping[iram0_text] } > iram0_0_seg .dram0.data : { _data_start = ABSOLUTE(.); *(.gnu.linkonce.d.*) *(.data1) *(.sdata) *(.sdata.*) *(.gnu.linkonce.s.*) *(.gnu.linkonce.s2.*) *(.jcr) mapping[dram0_data] _data_end = ABSOLUTE(.); . = ALIGN(4); } > dram0_0_seg /** * This section holds data that won't be initialised when startup. * This section locates in External RAM region. */ .ext_ram_noinit (NOLOAD) : { _ext_ram_noinit_start = ABSOLUTE(.); *(.ext_ram_noinit*) . = ALIGN(4); _ext_ram_noinit_end = ABSOLUTE(.); } > extern_ram_seg /*This section holds data that should not be initialized at power up. The section located in Internal SRAM memory region. The macro _NOINIT can be used as attribute to place data into this section. See the esp_attr.h file for more information. */ .noinit (NOLOAD): { . = ALIGN(4); _noinit_start = ABSOLUTE(.); *(.noinit .noinit.*) . = ALIGN(4) ; _noinit_end = ABSOLUTE(.); } > dram0_0_seg /* external memory bss, from any global variable with EXT_RAM_BSS_ATTR attribute*/ .ext_ram.bss (NOLOAD) : { _ext_ram_bss_start = ABSOLUTE(.); mapping[extern_ram] . = ALIGN(4); _ext_ram_bss_end = ABSOLUTE(.); } > extern_ram_seg /* Shared RAM */ .dram0.bss (NOLOAD) : { . = ALIGN (8); _bss_start = ABSOLUTE(.); mapping[dram0_bss] . = ALIGN (8); _bss_end = ABSOLUTE(.); } > dram0_0_seg ASSERT(((_bss_end - ORIGIN(dram0_0_seg)) <= LENGTH(dram0_0_seg)), "DRAM segment data does not fit.") .flash.appdesc : ALIGN(0x10) { _rodata_reserved_start = ABSOLUTE(.); /* This is a symbol marking the flash.rodata start, this can be used for mmu driver to maintain virtual address */ _rodata_start = ABSOLUTE(.); *(.rodata_desc .rodata_desc.*) /* Should be the first. App version info. DO NOT PUT ANYTHING BEFORE IT! */ *(.rodata_custom_desc .rodata_custom_desc.*) /* Should be the second. Custom app version info. DO NOT PUT ANYTHING BEFORE IT! */ /* Create an empty gap within this section. Thanks to this, the end of this * section will match .flah.rodata's begin address. Thus, both sections * will be merged when creating the final bin image. */ . = ALIGN(ALIGNOF(.flash.rodata)); } >default_rodata_seg ASSERT_SECTIONS_GAP(.flash.appdesc, .flash.rodata) .flash.rodata : ALIGN(0x10) { _flash_rodata_start = ABSOLUTE(.); mapping[flash_rodata] *(.irom1.text) /* catch stray ICACHE_RODATA_ATTR */ *(.gnu.linkonce.r.*) *(.rodata1) __XT_EXCEPTION_TABLE_ = ABSOLUTE(.); *(.xt_except_table) *(.gcc_except_table .gcc_except_table.*) *(.gnu.linkonce.e.*) *(.gnu.version_r) . = (. + 3) & ~ 3; __eh_frame = ABSOLUTE(.); KEEP(*(.eh_frame)) . = (. + 7) & ~ 3; /* C++ constructor and destructor tables Make a point of not including anything from crtbegin.o or crtend.o, as IDF doesn't use toolchain crt */ __init_array_start = ABSOLUTE(.); KEEP (*(EXCLUDE_FILE (*crtend.* *crtbegin.*) .ctors SORT(.ctors.*))) __init_array_end = ABSOLUTE(.); KEEP (*crtbegin.*(.dtors)) KEEP (*(EXCLUDE_FILE (*crtend.*) .dtors)) 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) /* Addresses of memory regions reserved via SOC_RESERVE_MEMORY_REGION() */ soc_reserved_memory_region_start = ABSOLUTE(.); KEEP (*(.reserved_memory_address)) soc_reserved_memory_region_end = ABSOLUTE(.); /* System init functions registered via ESP_SYSTEM_INIT_FN */ _esp_system_init_fn_array_start = ABSOLUTE(.); KEEP (*(SORT_BY_INIT_PRIORITY(.esp_system_init_fn.*))) _esp_system_init_fn_array_end = ABSOLUTE(.); _rodata_end = ABSOLUTE(.); /* Literals are also RO data. */ _lit4_start = ABSOLUTE(.); *(*.lit4) *(.lit4.*) *(.gnu.linkonce.lit4.*) _lit4_end = ABSOLUTE(.); . = ALIGN(4); _thread_local_start = ABSOLUTE(.); *(.tdata) *(.tdata.*) *(.tbss) *(.tbss.*) _thread_local_end = ABSOLUTE(.); . = ALIGN(4); } >default_rodata_seg _flash_rodata_align = ALIGNOF(.flash.rodata); /* This section is a place where we dump all the rodata which aren't used at runtime, so as to avoid binary size increase */ .flash.rodata_noload (NOLOAD) : { /* This is a symbol marking the flash.rodata end, this can be used for mmu driver to maintain virtual address We don't need to include the noload rodata in this section */ _rodata_reserved_end = ABSOLUTE(.); . = ALIGN (4); mapping[rodata_noload] } > default_rodata_seg .flash.text : { _stext = .; _instruction_reserved_start = ABSOLUTE(.); /* This is a symbol marking the flash.text start, this can be used for mmu driver to maintain virtual address */ _text_start = ABSOLUTE(.); mapping[flash_text] *(.stub .gnu.warning .gnu.linkonce.literal.* .gnu.linkonce.t.*.literal .gnu.linkonce.t.*) *(.irom0.text) /* catch stray ICACHE_RODATA_ATTR */ *(.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 */ . += _esp_flash_mmap_prefetch_pad_size; _text_end = ABSOLUTE(.); _instruction_reserved_end = ABSOLUTE(.); /* This is a symbol marking the flash.text end, this can be used for mmu driver to maintain virtual address */ _etext = .; /* Similar to _iram_start, this symbol goes here so it is resolved by addr2line in preference to the first symbol in the flash.text segment. */ _flash_cache_start = ABSOLUTE(0); } >default_code_seg /* Marks the end of IRAM code segment */ .iram0.text_end (NOLOAD) : { . = ALIGN (4); _iram_text_end = ABSOLUTE(.); } > iram0_0_seg .iram0.data : { . = ALIGN(4); _iram_data_start = ABSOLUTE(.); mapping[iram0_data] _iram_data_end = ABSOLUTE(.); } > iram0_0_seg .iram0.bss (NOLOAD) : { . = ALIGN(4); _iram_bss_start = ABSOLUTE(.); mapping[iram0_bss] _iram_bss_end = ABSOLUTE(.); . = ALIGN(4); _iram_end = ABSOLUTE(.); } > iram0_0_seg /* Marks the end of data, bss and possibly rodata */ .dram0.heap_start (NOLOAD) : { . = ALIGN (8); /* Lowest possible start address for the heap */ _heap_low_start = ABSOLUTE(.); } > dram0_0_seg /** 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.*)) } } ASSERT(((_iram_end - ORIGIN(iram0_0_seg)) <= LENGTH(iram0_0_seg)), "IRAM0 segment data does not fit.") ASSERT(((_heap_low_start - ORIGIN(dram0_0_seg)) <= LENGTH(dram0_0_seg)), "DRAM segment data does not fit.")