esp-idf/components/esp_system/ld/esp32/sections.ld.in

489 lines
14 KiB
Plaintext

/*
* SPDX-FileCopyrightText: 2021 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include "sdkconfig.h"
/* 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
.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;
#if CONFIG_COMPILER_CXX_EXCEPTIONS
__eh_frame = ABSOLUTE(.);
KEEP(*(.eh_frame))
. = (. + 7) & ~ 3;
#endif // CONFIG_COMPILER_CXX_EXCEPTIONS
/* 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 .xt.prop.* .gnu.linkonce.prop.*))
}
.xt.lit 0 :
{
KEEP (*(.xt.lit .xt.lit.* .gnu.linkonce.p.*))
}
/DISCARD/ :
{
*(.eh_frame_hdr)
#if !CONFIG_COMPILER_CXX_EXCEPTIONS
*(.eh_frame)
#endif // !CONFIG_COMPILER_CXX_EXCEPTIONS
}
}
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.")