mirror of
https://github.com/espressif/esp-idf.git
synced 2024-09-21 06:56:11 -04:00
3154abc66e
Adding prop and lit sections to the ELF will let the debugger and the disassembler have more info about data bytes present in the middle of the Xtensa instructions, usually used for padding.
447 lines
12 KiB
Plaintext
447 lines
12 KiB
Plaintext
/*
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* SPDX-FileCopyrightText: 2021 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/* Default entry point */
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ENTRY(call_start_cpu0);
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_diram_i_start = 0x40378000;
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SECTIONS
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{
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/**
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* RTC fast memory holds RTC wake stub code,
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* including from any source file named rtc_wake_stub*.c
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*/
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.rtc.text :
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{
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. = ALIGN(4);
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_rtc_text_start = ABSOLUTE(.);
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*(.rtc.entry.text)
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mapping[rtc_text]
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*rtc_wake_stub*.*(.literal .text .literal.* .text.*)
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_rtc_text_end = ABSOLUTE(.);
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} > rtc_iram_seg
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/**
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* This section is required to skip rtc.text area because rtc_iram_seg and
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* rtc_data_seg are reflect the same address space on different buses.
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*/
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.rtc.dummy :
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{
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_rtc_dummy_start = ABSOLUTE(.);
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_rtc_fast_start = ABSOLUTE(.);
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. = SIZEOF(.rtc.text);
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_rtc_dummy_end = ABSOLUTE(.);
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} > rtc_data_seg
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/**
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* This section located in RTC FAST Memory area.
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* It holds data marked with RTC_FAST_ATTR attribute.
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* See the file "esp_attr.h" for more information.
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*/
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.rtc.force_fast :
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{
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. = ALIGN(4);
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_rtc_force_fast_start = ABSOLUTE(.);
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mapping[rtc_force_fast]
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*(.rtc.force_fast .rtc.force_fast.*)
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. = ALIGN(4) ;
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_rtc_force_fast_end = ABSOLUTE(.);
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} > rtc_data_seg
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/**
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* RTC data section holds RTC wake stub
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* data/rodata, including from any source file
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* named rtc_wake_stub*.c and the data marked with
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* RTC_DATA_ATTR, RTC_RODATA_ATTR attributes.
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* The memory location of the data is dependent on
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* CONFIG_ESP32S3_RTCDATA_IN_FAST_MEM option.
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*/
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.rtc.data :
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{
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_rtc_data_start = ABSOLUTE(.);
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mapping[rtc_data]
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*rtc_wake_stub*.*(.data .rodata .data.* .rodata.* .bss .bss.*)
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_rtc_data_end = ABSOLUTE(.);
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} > rtc_data_location
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/* RTC bss, from any source file named rtc_wake_stub*.c */
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.rtc.bss (NOLOAD) :
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{
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_rtc_bss_start = ABSOLUTE(.);
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*rtc_wake_stub*.*(.bss .bss.*)
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*rtc_wake_stub*.*(COMMON)
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mapping[rtc_bss]
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_rtc_bss_end = ABSOLUTE(.);
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} > rtc_data_location
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/**
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* This section holds data that should not be initialized at power up
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* and will be retained during deep sleep.
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* User data marked with RTC_NOINIT_ATTR will be placed
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* into this section. See the file "esp_attr.h" for more information.
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* The memory location of the data is dependent on CONFIG_ESP32S3_RTCDATA_IN_FAST_MEM option.
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*/
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.rtc_noinit (NOLOAD):
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{
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. = ALIGN(4);
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_rtc_noinit_start = ABSOLUTE(.);
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*(.rtc_noinit .rtc_noinit.*)
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. = ALIGN(4) ;
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_rtc_noinit_end = ABSOLUTE(.);
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} > rtc_data_location
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/**
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* This section located in RTC SLOW Memory area.
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* It holds data marked with RTC_SLOW_ATTR attribute.
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* See the file "esp_attr.h" for more information.
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*/
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.rtc.force_slow :
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{
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. = ALIGN(4);
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_rtc_force_slow_start = ABSOLUTE(.);
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*(.rtc.force_slow .rtc.force_slow.*)
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. = ALIGN(4) ;
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_rtc_force_slow_end = ABSOLUTE(.);
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} > rtc_slow_seg
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/* Get size of rtc slow data based on rtc_data_location alias */
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_rtc_slow_length = (ORIGIN(rtc_slow_seg) == ORIGIN(rtc_data_location))
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? (_rtc_force_slow_end - _rtc_data_start)
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: (_rtc_force_slow_end - _rtc_force_slow_start);
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_rtc_fast_length = (ORIGIN(rtc_slow_seg) == ORIGIN(rtc_data_location))
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? (_rtc_force_fast_end - _rtc_fast_start)
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: (_rtc_noinit_end - _rtc_fast_start);
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ASSERT((_rtc_slow_length <= LENGTH(rtc_slow_seg)),
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"RTC_SLOW segment data does not fit.")
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ASSERT((_rtc_fast_length <= LENGTH(rtc_data_seg)),
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"RTC_FAST segment data does not fit.")
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/* Send .iram0 code to iram */
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.iram0.vectors :
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{
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_iram_start = ABSOLUTE(.);
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/* Vectors go to IRAM */
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_vector_table = ABSOLUTE(.);
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. = 0x0;
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KEEP(*(.WindowVectors.text));
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. = 0x180;
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KEEP(*(.Level2InterruptVector.text));
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. = 0x1c0;
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KEEP(*(.Level3InterruptVector.text));
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. = 0x200;
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KEEP(*(.Level4InterruptVector.text));
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. = 0x240;
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KEEP(*(.Level5InterruptVector.text));
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. = 0x280;
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KEEP(*(.DebugExceptionVector.text));
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. = 0x2c0;
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KEEP(*(.NMIExceptionVector.text));
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. = 0x300;
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KEEP(*(.KernelExceptionVector.text));
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. = 0x340;
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KEEP(*(.UserExceptionVector.text));
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. = 0x3C0;
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KEEP(*(.DoubleExceptionVector.text));
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. = 0x400;
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_invalid_pc_placeholder = ABSOLUTE(.);
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*(.*Vector.literal)
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*(.UserEnter.literal);
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*(.UserEnter.text);
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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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_init_end = ABSOLUTE(.);
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} > iram0_0_seg
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.iram0.text :
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{
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/* Code marked as running out of IRAM */
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_iram_text_start = ABSOLUTE(.);
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mapping[iram0_text]
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} > iram0_0_seg
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/**
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* This section is required to skip .iram0.text area because iram0_0_seg and
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* dram0_0_seg reflect the same address space on different buses.
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*/
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.dram0.dummy (NOLOAD):
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{
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. = ORIGIN(dram0_0_seg) + MAX(_iram_end - _diram_i_start, 0);
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} > dram0_0_seg
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.dram0.data :
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{
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_data_start = ABSOLUTE(.);
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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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*(.gnu.linkonce.s2.*)
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*(.jcr)
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_esp_system_init_fn_array_start = ABSOLUTE(.);
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KEEP (*(SORT(.esp_system_init_fn) SORT(.esp_system_init_fn.*)))
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_esp_system_init_fn_array_end = ABSOLUTE(.);
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mapping[dram0_data]
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_data_end = ABSOLUTE(.);
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. = ALIGN(4);
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} > dram0_0_seg
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/**
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* This section holds data that should not be initialized at power up.
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* The section located in Internal SRAM memory region. The macro _NOINIT
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* can be used as attribute to place data into this section.
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* See the "esp_attr.h" file for more information.
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*/
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.noinit (NOLOAD):
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{
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. = ALIGN(4);
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_noinit_start = ABSOLUTE(.);
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*(.noinit .noinit.*)
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. = ALIGN(4) ;
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_noinit_end = ABSOLUTE(.);
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} > dram0_0_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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*(.ext_ram.bss*)
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mapping[dram0_bss]
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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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*(.share.mem)
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*(.gnu.linkonce.b.*)
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. = ALIGN (8);
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_bss_end = ABSOLUTE(.);
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} > dram0_0_seg
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ASSERT(((_bss_end - ORIGIN(dram0_0_seg)) <= LENGTH(dram0_0_seg)), "DRAM segment data does not fit.")
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.flash.text :
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{
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_stext = .;
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_instruction_reserved_start = ABSOLUTE(.);
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_text_start = ABSOLUTE(.);
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mapping[flash_text]
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*(.stub .gnu.warning .gnu.linkonce.literal.* .gnu.linkonce.t.*.literal .gnu.linkonce.t.*)
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*(.irom0.text) /* catch stray ICACHE_RODATA_ATTR */
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*(.fini.literal)
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*(.fini)
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*(.gnu.version)
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/** CPU will try to prefetch up to 16 bytes of
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* of instructions. This means that any configuration (e.g. MMU, PMS) must allow
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* safe access to up to 16 bytes after the last real instruction, add
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* dummy bytes to ensure this
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*/
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. += _esp_flash_mmap_prefetch_pad_size;
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_text_end = ABSOLUTE(.);
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_instruction_reserved_end = ABSOLUTE(.);
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_etext = .;
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/**
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* Similar to _iram_start, this symbol goes here so it is
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* resolved by addr2line in preference to the first symbol in
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* the flash.text segment.
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*/
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_flash_cache_start = ABSOLUTE(0);
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} > default_code_seg
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/**
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* This dummy section represents the .flash.text section but in default_rodata_seg.
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* Thus, it must have its alignement and (at least) its size.
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*/
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.flash_rodata_dummy (NOLOAD):
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{
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_flash_rodata_dummy_start = .;
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/* Start at the same alignement constraint than .flash.text */
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. = ALIGN(ALIGNOF(.flash.text));
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/* Create an empty gap as big as .flash.text section */
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. = . + SIZEOF(.flash.text);
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/* Prepare the alignement of the section above. Few bytes (0x20) must be
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* added for the mapping header. */
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. = ALIGN(0x10000) + 0x20;
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_rodata_reserved_start = .;
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} > default_rodata_seg
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.flash.appdesc : ALIGN(0x10)
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{
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_rodata_start = ABSOLUTE(.);
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*(.rodata_desc .rodata_desc.*) /* Should be the first. App version info. DO NOT PUT ANYTHING BEFORE IT! */
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*(.rodata_custom_desc .rodata_custom_desc.*) /* Should be the second. Custom app version info. DO NOT PUT ANYTHING BEFORE IT! */
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/* Create an empty gap within this section. Thanks to this, the end of this
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* section will match .flah.rodata's begin address. Thus, both sections
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* will be merged when creating the final bin image. */
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. = ALIGN(ALIGNOF(.flash.rodata));
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} >default_rodata_seg
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.flash.rodata : ALIGN(0x10)
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{
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_flash_rodata_start = ABSOLUTE(.);
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mapping[flash_rodata]
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*(.irom1.text) /* catch stray ICACHE_RODATA_ATTR */
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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 .gcc_except_table.*)
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*(.gnu.linkonce.e.*)
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*(.gnu.version_r)
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. = (. + 3) & ~ 3;
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__eh_frame = ABSOLUTE(.);
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KEEP(*(.eh_frame))
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. = (. + 7) & ~ 3;
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/* C++ constructor and destructor tables */
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/* Don't include anything from crtbegin.o or crtend.o, as IDF doesn't use toolchain crt */
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__init_array_start = ABSOLUTE(.);
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KEEP (*(EXCLUDE_FILE (*crtend.* *crtbegin.*) .ctors SORT(.ctors.*)))
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__init_array_end = ABSOLUTE(.);
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KEEP (*crtbegin.*(.dtors))
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KEEP (*(EXCLUDE_FILE (*crtend.*) .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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/* Addresses of memory regions reserved via SOC_RESERVE_MEMORY_REGION() */
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soc_reserved_memory_region_start = ABSOLUTE(.);
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KEEP (*(.reserved_memory_address))
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soc_reserved_memory_region_end = ABSOLUTE(.);
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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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_thread_local_start = ABSOLUTE(.);
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*(.tdata)
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*(.tdata.*)
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*(.tbss)
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*(.tbss.*)
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_thread_local_end = ABSOLUTE(.);
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_rodata_reserved_end = ABSOLUTE(.);
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. = ALIGN(4);
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} > default_rodata_seg
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_flash_rodata_align = ALIGNOF(.flash.rodata);
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.flash.rodata_noload (NOLOAD) :
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{
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. = ALIGN (4);
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mapping[rodata_noload]
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} > default_rodata_seg
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/* Marks the end of IRAM code segment */
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.iram0.text_end (NOLOAD) :
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{
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/* ESP32-S3 memprot requires 16B padding for possible CPU prefetch and 256B alignment for PMS split lines */
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. += _esp_memprot_prefetch_pad_size;
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. = ALIGN(_esp_memprot_align_size);
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/* iram_end_test section exists for use by memprot unit tests only */
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*(.iram_end_test)
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_iram_text_end = ABSOLUTE(.);
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} > iram0_0_seg
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.iram0.data :
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{
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. = ALIGN(4);
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_iram_data_start = ABSOLUTE(.);
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mapping[iram0_data]
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_iram_data_end = ABSOLUTE(.);
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} > iram0_0_seg
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.iram0.bss (NOLOAD) :
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{
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. = ALIGN(4);
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_iram_bss_start = ABSOLUTE(.);
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mapping[iram0_bss]
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_iram_bss_end = ABSOLUTE(.);
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. = ALIGN(4);
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_iram_end = ABSOLUTE(.);
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} > iram0_0_seg
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/* Marks the end of data, bss and possibly rodata */
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.dram0.heap_start (NOLOAD) :
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{
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. = ALIGN (8);
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_heap_start = ABSOLUTE(.);
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} > dram0_0_seg
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/** This section will be used by the debugger and disassembler to get more information
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* about raw data present in the code.
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* Indeed, it may be required to add some padding at some points in the code
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* in order to align a branch/jump destination on a particular bound.
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* Padding these instructions will generate null bytes that shall be
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* interpreted as data, and not code by the debugger or disassembler.
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* This section will only be present in the ELF file, not in the final binary
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* For more details, check GCC-212
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*/
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.xt.prop 0 :
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{
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KEEP (*(.xt.prop .gnu.linkonce.prop.*))
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}
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.xt.lit 0 :
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{
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KEEP (*(.xt.lit .gnu.linkonce.p.*))
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}
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}
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ASSERT(((_iram_end - ORIGIN(iram0_0_seg)) <= LENGTH(iram0_0_seg)),
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"IRAM0 segment data does not fit.")
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ASSERT(((_heap_start - ORIGIN(dram0_0_seg)) <= LENGTH(dram0_0_seg)),
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"DRAM segment data does not fit.")
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