/* * SPDX-FileCopyrightText: 2021 Espressif Systems (Shanghai) CO LTD * * SPDX-License-Identifier: Apache-2.0 */ /* 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); _rtc_fast_start = ABSOLUTE(.); mapping[rtc_text] *rtc_wake_stub*.*(.literal .text .literal.* .text.*) *(.rtc_text_end_test) /* 16B padding for possible CPU prefetch and 4B alignment for PMS split lines */ . += _esp_memprot_prefetch_pad_size; . = ALIGN(4); _rtc_text_end = ABSOLUTE(.); } > rtc_iram_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. */ .rtc.data : { _rtc_data_start = ABSOLUTE(.); mapping[rtc_data] *rtc_wake_stub*.*(.data .rodata .data.* .rodata.* .bss .bss.*) _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. */ .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 /* 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.") .iram0.text : { _iram_start = ABSOLUTE(.); /* Vectors go to start of IRAM */ ASSERT(ABSOLUTE(.) % 0x100 == 0, "vector address must be 256 byte aligned"); KEEP(*(.exception_vectors.text)); . = ALIGN(4); _invalid_pc_placeholder = ABSOLUTE(.); /* Code marked as running out of IRAM */ _iram_text_start = ABSOLUTE(.); mapping[iram0_text] } > iram0_0_seg /** * This section is required to skip .iram0.text area because iram0_0_seg and * dram0_0_seg reflect the same address space on different buses. */ .dram0.dummy (NOLOAD): { . = ORIGIN(dram0_0_seg) + _iram_end - _iram_start; } > dram0_0_seg .dram0.data : { _data_start = ABSOLUTE(.); *(.gnu.linkonce.d.*) *(.data1) __global_pointer$ = . + 0x800; *(.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 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 /* Shared RAM */ .dram0.bss (NOLOAD) : { . = ALIGN (8); _bss_start = ABSOLUTE(.); mapping[dram0_bss] *(.dynsbss) *(.sbss) *(.sbss.*) *(.gnu.linkonce.sb.*) *(.scommon) *(.sbss2) *(.sbss2.*) *(.gnu.linkonce.sb2.*) *(.dynbss) *(.share.mem) *(.gnu.linkonce.b.*) . = 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.text : { _stext = .; _instruction_reserved_start = ABSOLUTE(.); _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(.); _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 /** * This dummy section represents the .flash.text section but in default_rodata_seg. * Thus, it must have its alignment and (at least) its size. */ .flash_rodata_dummy (NOLOAD): { _flash_rodata_dummy_start = .; /* Start at the same alignment constraint than .flash.text */ . = ALIGN(ALIGNOF(.flash.text)); /* Create an empty gap as big as .flash.text section */ . = . + SIZEOF(.flash.text); /* Prepare the alignment of the section above. Few bytes (0x20) must be * added for the mapping header. */ . = ALIGN(0x10000) + 0x20; _rodata_reserved_start = .; } > default_rodata_seg .flash.appdesc : ALIGN(0x10) { _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 .flash.rodata's begin address. Thus, both sections * will be merged when creating the final bin image. */ . = ALIGN(ALIGNOF(.flash.rodata)); } >default_rodata_seg .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) . = (. + 7) & ~ 3; /* * C++ constructor and destructor tables * Don't include anything from crtbegin.o or crtend.o, as IDF doesn't use toolchain crt. * * RISC-V gcc is configured with --enable-initfini-array so it emits an .init_array section instead. * But the init_priority sections will be sorted for iteration in ascending order during startup. * The rest of the init_array sections is sorted for iteration in descending order during startup, however. * Hence a different section is generated for the init_priority functions which is iterated in * ascending order during startup. The corresponding code can be found in startup.c. */ __init_priority_array_start = ABSOLUTE(.); KEEP (*(EXCLUDE_FILE (*crtend.* *crtbegin.*) .init_array.*)) __init_priority_array_end = ABSOLUTE(.); __init_array_start = ABSOLUTE(.); KEEP (*(EXCLUDE_FILE (*crtend.* *crtbegin.*) .init_array)) __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(.); _rodata_reserved_end = ABSOLUTE(.); . = ALIGN(ALIGNOF(.eh_frame)); } > default_rodata_seg /* Keep this section shall be at least aligned on 4 */ .eh_frame : ALIGN(8) { __eh_frame = ABSOLUTE(.); KEEP (*(.eh_frame)) __eh_frame_end = ABSOLUTE(.); /* Guarantee that this section and the next one will be merged by making * them adjacent. */ . = ALIGN(ALIGNOF(.eh_frame_hdr)); } > default_rodata_seg /* To avoid any exception in C++ exception frame unwinding code, this section * shall be aligned on 8. */ .eh_frame_hdr : ALIGN(8) { __eh_frame_hdr = ABSOLUTE(.); KEEP (*(.eh_frame_hdr)) __eh_frame_hdr_end = ABSOLUTE(.); } > default_rodata_seg .flash.rodata_noload (NOLOAD) : { . = ALIGN (4); mapping[rodata_noload] } > default_rodata_seg /* Marks the end of IRAM code segment */ .iram0.text_end (NOLOAD) : { /* iram_end_test section exists for use by Memprot unit tests only */ *(.iram_end_test) /* ESP32-C3 memprot requires 16B padding for possible CPU prefetch and 512B alignment for PMS split lines */ . += _esp_memprot_prefetch_pad_size; . = ALIGN(_esp_memprot_align_size); _iram_text_end = ABSOLUTE(.); } > iram0_0_seg .iram0.data : { . = ALIGN(16); _iram_data_start = ABSOLUTE(.); mapping[iram0_data] _iram_data_end = ABSOLUTE(.); } > iram0_0_seg .iram0.bss (NOLOAD) : { . = ALIGN(16); _iram_bss_start = ABSOLUTE(.); mapping[iram0_bss] _iram_bss_end = ABSOLUTE(.); . = ALIGN(16); _iram_end = ABSOLUTE(.); } > iram0_0_seg /* Marks the end of data, bss and possibly rodata */ .dram0.heap_start (NOLOAD) : { . = ALIGN (16); _heap_start = ABSOLUTE(.); } > dram0_0_seg } ASSERT(((_iram_end - ORIGIN(iram0_0_seg)) <= LENGTH(iram0_0_seg)), "IRAM0 segment data does not fit.") ASSERT(((_heap_start - ORIGIN(dram0_0_seg)) <= LENGTH(dram0_0_seg)), "DRAM segment data does not fit.")