nuttx/boards/xtensa/esp32s3/esp32s3-devkit/scripts/esp32s3.ld

/****************************************************************************
 * boards/xtensa/esp32s3/esp32s3-devkit/scripts/esp32s3_flash.ld
 ****************************************************************************/

/* Default entry point: */

ENTRY(__start);

_diram_i_start = 0x40378000;

SECTIONS
{
  /* Send .iram0 code to iram */

  .iram0.vectors :
  {
    _iram_start = ABSOLUTE(.);

    /* 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 (*(.window_vectors.text));
    . = 0x180;
    KEEP (*(.xtensa_level2_vector.text));
    . = 0x1c0;
    KEEP (*(.xtensa_level3_vector.text));
    . = 0x200;
    KEEP (*(.xtensa_level4_vector.text));
    . = 0x240;
    KEEP (*(.xtensa_level5_vector.text));
    . = 0x280;
    KEEP (*(.debug_exception_vector.text));
    . = 0x2c0;
    KEEP (*(.nmi_vector.text));
    . = 0x300;
    KEEP (*(.kernel_exception_vector.text));
    . = 0x340;
    KEEP (*(.user_exception_vector.text));
    . = 0x3c0;
    KEEP (*(.double_exception_vector.text));
    . = 0x400;
    *(.*_vector.literal)

    . = ALIGN(16);

    *(.entry.text)
    *(.init.literal)
    *(.init)
  } > iram0_0_seg

  .iram0.text :
  {
    /* Code marked as running out of IRAM */

    *(.iram1 .iram1.*)

    /* align + add 16B for CPU dummy speculative instr. fetch */

    . = ALIGN(4) + 16;

    _iram_text = ABSOLUTE(.);
  } > iram0_0_seg

  .dram0.dummy (NOLOAD) :
  {
    /* 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.
     */

    . = ORIGIN(dram0_0_seg) + _iram_end - _iram_start;
  } > dram0_0_seg

  /* Shared RAM */

  .dram0.bss (NOLOAD) :
  {
    /* .bss initialized on power-up */

    . = ALIGN(8);
    _sbss = ABSOLUTE(.);

    *(.bss .bss.*)
    *(COMMON)
    *(.dynsbss)
    *(.sbss)
    *(.sbss.*)
    *(.gnu.linkonce.sb.*)
    *(.scommon)
    *(.sbss2)
    *(.sbss2.*)
    *(.gnu.linkonce.sb2.*)
    *(.dynbss)
    *(.share.mem)
    *(.gnu.linkonce.b.*)

    . = ALIGN(8);
    _ebss = ABSOLUTE(.);
  } > dram0_0_seg

  .noinit (NOLOAD) :
  {
    /* This section contains data that is not initialized during load,
     * or during the application's initialization sequence.
     */

    . = ALIGN(4);

    *(.noinit .noinit.*)

    . = ALIGN(4);
  } > dram0_0_seg

  .dram0.data :
  {
    /* .data initialized on power-up in ROMed configurations. */

    _sdata = 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.*)

    _edata = ABSOLUTE(.);
    . = ALIGN(4);

    /* Heap starts at the end of .data */

    _sheap = ABSOLUTE(.);
  } > dram0_0_seg

  .flash.text :
  {
    _stext = .;
    *(.literal .text .literal.* .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 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
     */

    . += 16;

    _etext = .;
  } > default_code_seg

  .flash_rodata_dummy (NOLOAD) :
  {
    /* This dummy section represents the .flash.text section but in default_rodata_seg.
     * Thus, it must have its alignment and (at least) its size.
     */

    /* 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.rodata : ALIGN(0x10)
  {
    _srodata = ABSOLUTE(.);

    *(.rodata)
    *(.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)
    *(.eh_frame)

    . = ALIGN(4);

    /* C++ constructor and destructor tables, properly ordered: */

    _sinit = ABSOLUTE(.);
    KEEP (*crtbegin.o(.ctors))
    KEEP (*(EXCLUDE_FILE (*crtend.o) .ctors))
    KEEP (*(SORT(.ctors.*)))
    KEEP (*(.ctors))
    _einit = ABSOLUTE(.);
    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)
    _erodata = ABSOLUTE(.);

    /* Literals are also RO data. */

    _lit4_start = ABSOLUTE(.);
    *(*.lit4)
    *(.lit4.*)
    *(.gnu.linkonce.lit4.*)
    _lit4_end = ABSOLUTE(.);
    _rodata_reserved_end = ABSOLUTE(.);
    . = ALIGN(4);
  } > default_rodata_seg

  /* Marks the end of IRAM code segment */

  .iram0.text_end (NOLOAD) :
  {
    /* ESP32-S3 memprot requires 16B padding for possible CPU prefetch and
     * 256B alignment for PMS split lines.
     */

    . += 16;
    . = ALIGN(256);
  } > iram0_0_seg

  .iram0.data :
  {
    . = ALIGN(4);

    *(.iram.data)
    *(.iram.data.*)
  } > iram0_0_seg

  .iram0.bss (NOLOAD) :
  {
    . = ALIGN(4);

    *(.iram.bss)
    *(.iram.bss.*)

    . = ALIGN(4);
    _iram_end = ABSOLUTE(.);
  } > iram0_0_seg
}