nuttx/boards/xtensa/esp32s2/common/scripts/legacy_sections.ld

/****************************************************************************
 * boards/xtensa/esp32s2/common/scripts/legacy_sections.ld
 *
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.  The
 * ASF licenses this file to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance with the
 * License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
 * License for the specific language governing permissions and limitations
 * under the License.
 *
 ****************************************************************************/

/* Default entry point: */

ENTRY(__start);

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_reserved_for_iram (NOLOAD):
  {
    . = ORIGIN(dram0_0_seg) + _iram_text - _iram_start;
  } >dram0_0_seg

  /* Shared RAM */

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

    . = ALIGN (8);
    _sbss = ABSOLUTE(.);
    *(.dynsbss)
    *(.sbss)
    *(.sbss.*)
    *(.gnu.linkonce.sb.*)
    *(.scommon)
    *(.sbss2)
    *(.sbss2.*)
    *(.gnu.linkonce.sb2.*)
    *(.dynbss)
    KEEP (*(.bss))
    *(.bss.*)
    *(.share.mem)
    *(.gnu.linkonce.b.*)
    *(COMMON)
    . = 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)
    . = 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.*)
    . = ALIGN(4);
    _edata = ABSOLUTE(.);

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

    _sheap = ABSOLUTE(.);
  } >dram0_0_seg

  .flash.rodata :
  {
    _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)

    . = (. + 3) & ~ 3;

    /* 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(.);
    . = ALIGN(4);
  } >default_rodata_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

  .rtc.text :
  {
    . = ALIGN(4);
    *(.rtc.literal .rtc.text)
  } >rtc_iram_seg

  .rtc.data :
  {
    *(.rtc.data)
    *(.rtc.rodata)

   /* Whatever is left from the RTC memory is used as a special heap. */

    . = ALIGN (4);
    _srtcheap = ABSOLUTE(.);
  } >rtc_slow_seg
}