arch/xtensa/soc/esp32/linker.ld

/*
 * Copyright (c) 2016 Cadence Design Systems, Inc.
 * Copyright (c) 2017 Intel Corporation
 * SPDX-License-Identifier: Apache-2.0
 */

/**
 * @file
 * @brief Linker command/script file
 *
 * Linker script for the Xtensa platform.
 */

#define _LINKER
#define _ASMLANGUAGE

#include <autoconf.h>
#include <linker/sections.h>
#include <linker/linker-defs.h>
#include <linker/linker-tool.h>

#define RAMABLE_REGION dram0_0_seg :dram0_0_phdr
#define ROMABLE_REGION iram0_0_seg :iram0_0_phdr

PROVIDE ( __stack = 0x3ffe3f20 );

PROVIDE ( uart_tx_one_char = 0x40009200 );
PROVIDE ( uart_rx_one_char = 0x400092d0 );
PROVIDE ( uartAttach = 0x40008fd0 );

MEMORY
{
  iram0_0_seg(RX): org = 0x40080000, len = 0x20000
  iram0_2_seg(RX): org = 0x400D0018, len = 0x330000
  dram0_0_seg(RW): org = 0x3FFB0000, len = 0x50000
  drom0_0_seg(R): org = 0x3F400010, len = 0x800000
  rtc_iram_seg(RWX): org = 0x400C0000, len = 0x2000
  rtc_slow_seg(RW): org = 0x50000000, len = 0x1000
}

PHDRS
{
  iram0_0_phdr PT_LOAD;
  dram0_0_phdr PT_LOAD;
}

/*  Default entry point:  */
PROVIDE ( _ResetVector = 0x40000400 );

_rom_store_table = 0;

PROVIDE(_memmap_vecbase_reset = 0x40000450);
PROVIDE(_memmap_reset_vector = 0x40000400);

SECTIONS
{
  /* RTC fast memory holds RTC wake stub code,
     including from any source file named rtc_wake_stub*.c
  */
  .rtc.text :
  {
    . = ALIGN(4);
    *(.rtc.literal .rtc.text)
    *rtc_wake_stub*.o(.literal .text .literal.* .text.*)
  } >rtc_iram_seg

  /* RTC slow memory holds RTC wake stub
     data/rodata, including from any source file
     named rtc_wake_stub*.c
  */
  .rtc.data :
  {
    _rtc_data_start = ABSOLUTE(.);
    *(.rtc.data)
    *(.rtc.rodata)
    *rtc_wake_stub*.o(.data .rodata .data.* .rodata.* .bss .bss.*)
    _rtc_data_end = ABSOLUTE(.);
  } > rtc_slow_seg

  /* RTC bss, from any source file named rtc_wake_stub*.c */
  .rtc.bss (NOLOAD) :
  {
    _rtc_bss_start = ABSOLUTE(.);
    *rtc_wake_stub*.o(.bss .bss.*)
    *rtc_wake_stub*.o(COMMON)
    _rtc_bss_end = ABSOLUTE(.);
  } > rtc_slow_seg

  /* Send .iram0 code to iram */
  .iram0.vectors : ALIGN(4)
  {
    /* Vectors go to IRAM */
    _init_start = 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;
    *(.*Vector.literal)

    *(.UserEnter.literal);
    *(.UserEnter.text);
    . = ALIGN (16);
    *(.entry.text)
    *(.init.literal)
    *(.init)
    _init_end = ABSOLUTE(.);

    /* This goes here, not at top of linker script, so addr2line finds it last,
       and uses it in preference to the first symbol in IRAM */
    _iram_start = ABSOLUTE(0);
  } GROUP_LINK_IN(ROMABLE_REGION)

#include <linker/common-ram.ld>
#include <linker/common-rom.ld>

  SECTION_PROLOGUE(_TEXT_SECTION_NAME, , ALIGN(4))
  {
    /* Code marked as running out of IRAM */
    _iram_text_start = ABSOLUTE(.);
    *(.iram1 .iram1.*)
    *(.iram0.literal .iram.literal .iram.text.literal .iram0.text .iram.text)
    *libhal.a:(.literal .text .literal.* .text.*)
    _iram_text_end = ABSOLUTE(.);
  } GROUP_LINK_IN(ROMABLE_REGION)

  .dram0.data :
  {
    _data_start = ABSOLUTE(.);
    KEEP(*(.data))
    KEEP(*(.data.*))
    KEEP(*(.gnu.linkonce.d.*))
    KEEP(*(.data1))
    KEEP(*(.sdata))
    KEEP(*(.sdata.*))
    KEEP(*(.gnu.linkonce.s.*))
    KEEP(*(.sdata2))
    KEEP(*(.sdata2.*))
    KEEP(*(.gnu.linkonce.s2.*))
    KEEP(*(.jcr))
    *(.dram1 .dram1.*)
    _data_end = ABSOLUTE(.);
    . = ALIGN(4);
  } GROUP_LINK_IN(RAMABLE_REGION)

  SECTION_PROLOGUE(_RODATA_SECTION_NAME,,ALIGN(4))
  {
    _rodata_start = ABSOLUTE(.);
    *(.rodata)
    *(.rodata.*)
    *(.gnu.linkonce.r.*)
    *(.rodata1)
    __XT_EXCEPTION_TABLE__ = ABSOLUTE(.);
    KEEP (*(.xt_except_table))
    KEEP (*(.gcc_except_table))
    *(.gnu.linkonce.e.*)
    *(.gnu.version_r)
    KEEP (*(.eh_frame))
    /*  C++ constructor and destructor tables, properly ordered:  */
    KEEP (*crtbegin.o(.ctors))
    KEEP (*(EXCLUDE_FILE (*crtend.o) .ctors))
    KEEP (*(SORT(.ctors.*)))
    KEEP (*(.ctors))
    KEEP (*crtbegin.o(.dtors))
    KEEP (*(EXCLUDE_FILE (*crtend.o) .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)
    . = ALIGN(4);               /* this table MUST be 4-byte aligned */
    _rodata_end = ABSOLUTE(.);
  } GROUP_LINK_IN(RAMABLE_REGION)


  /* Shared RAM */
  SECTION_DATA_PROLOGUE(_BSS_SECTION_NAME,(NOLOAD),)
  {
    . = ALIGN (8);
    _bss_start = ABSOLUTE(.);
    *(.dynsbss)
    *(.sbss)
    *(.sbss.*)
    *(.gnu.linkonce.sb.*)
    *(.scommon)
    *(.sbss2)
    *(.sbss2.*)
    *(.gnu.linkonce.sb2.*)
    *(.dynbss)
    *(.bss)
    *(.bss.*)
    *(.share.mem)
    *(.gnu.linkonce.b.*)
    *(COMMON)
    . = ALIGN (8);
    _bss_end = ABSOLUTE(.);
    _heap_start = ABSOLUTE(.);
  } GROUP_LINK_IN(RAMABLE_REGION)
}