circuitpython/esp8266/esp8266.ld

/* GNU linker script for ESP8266 */

MEMORY
{
    dport0_0_seg : org = 0x3ff00000, len = 0x10
    dram0_0_seg :  org = 0x3ffe8000, len = 0x14000
    iram1_0_seg :  org = 0x40100000, len = 0x8000
    irom0_0_seg :  org = 0x40210000, len = 0x5A000
}

/* define the top of RAM */
_heap_end = ORIGIN(dram0_0_seg) + LENGTH(dram0_0_seg);

PHDRS
{
    dport0_0_phdr PT_LOAD;
    dram0_0_phdr PT_LOAD;
    dram0_0_bss_phdr PT_LOAD;
    iram1_0_phdr PT_LOAD;
    irom0_0_phdr PT_LOAD;
}

ENTRY(call_user_start)
EXTERN(_DebugExceptionVector)
EXTERN(_DoubleExceptionVector)
EXTERN(_KernelExceptionVector)
EXTERN(_NMIExceptionVector)
EXTERN(_UserExceptionVector)

PROVIDE(_memmap_vecbase_reset = 0x40000000);

/* Various memory-map dependent cache attribute settings: */
_memmap_cacheattr_wb_base = 0x00000110;
_memmap_cacheattr_wt_base = 0x00000110;
_memmap_cacheattr_bp_base = 0x00000220;
_memmap_cacheattr_unused_mask = 0xFFFFF00F;
_memmap_cacheattr_wb_trapnull = 0x2222211F;
_memmap_cacheattr_wba_trapnull = 0x2222211F;
_memmap_cacheattr_wbna_trapnull = 0x2222211F;
_memmap_cacheattr_wt_trapnull = 0x2222211F;
_memmap_cacheattr_bp_trapnull = 0x2222222F;
_memmap_cacheattr_wb_strict = 0xFFFFF11F;
_memmap_cacheattr_wt_strict = 0xFFFFF11F;
_memmap_cacheattr_bp_strict = 0xFFFFF22F;
_memmap_cacheattr_wb_allvalid = 0x22222112;
_memmap_cacheattr_wt_allvalid = 0x22222112;
_memmap_cacheattr_bp_allvalid = 0x22222222;
PROVIDE(_memmap_cacheattr_reset = _memmap_cacheattr_wb_trapnull);

SECTIONS
{

    .dport0.rodata : ALIGN(4)
    {
        _dport0_rodata_start = ABSOLUTE(.);
        *(.dport0.rodata)
        *(.dport.rodata)
        _dport0_rodata_end = ABSOLUTE(.);
    } >dport0_0_seg :dport0_0_phdr

    .dport0.literal : ALIGN(4)
    {
        _dport0_literal_start = ABSOLUTE(.);
        *(.dport0.literal)
        *(.dport.literal)
        _dport0_literal_end = ABSOLUTE(.);
    } >dport0_0_seg :dport0_0_phdr

    .dport0.data : ALIGN(4)
    {
        _dport0_data_start = ABSOLUTE(.);
        *(.dport0.data)
        *(.dport.data)
        _dport0_data_end = ABSOLUTE(.);
    } >dport0_0_seg :dport0_0_phdr

    .irom0.text : ALIGN(4)
    {
        _irom0_text_start = ABSOLUTE(.);
        *(.irom0.literal .irom.literal .irom.text.literal .irom0.text .irom.text)

        /* we put some specific text in this section */
        *py/*.o*(.literal* .text*)
        *pyexec.o(.literal*, .text*)
        *readline.o(.literal*, .text*)
        *pybstdio.o(.literal*, .text*)
        *gccollect.o(.literal* .text*)
        *gchelper.o(.literal* .text*)
        *modpyb.o(.literal*, .text*)
        *modpybpin.o(.literal*, .text*)
        *modpybrtc.o(.literal*, .text*)
        *modesp.o(.literal* .text*)
        *modutime.o(.literal* .text*)

        /* we put as much rodata as possible in this section */
        /* note that only rodata accessed as a machine word is allowed here */
        *py/qstr.o(.rodata.const_pool)
        *py/*.o(.rodata.mp_type_*) /* catches type: mp_obj_type_t */
        *py/*.o(.rodata.*_locals_dict*) /* catches types: mp_obj_dict_t, mp_map_elem_t */
        *py/*.o(.rodata.mp_module_*) /* catches types: mp_obj_module_t, mp_obj_dict_t, mp_map_elem_t */

        _irom0_text_end = ABSOLUTE(.);
    } >irom0_0_seg :irom0_0_phdr

    .text : ALIGN(4)
    {
        _stext = .;
        _text_start = ABSOLUTE(.);
        *(.UserEnter.text)
        . = ALIGN(16);
        *(.DebugExceptionVector.text)
        . = ALIGN(16);
        *(.NMIExceptionVector.text)
        . = ALIGN(16);
        *(.KernelExceptionVector.text)
        LONG(0)
        LONG(0)
        LONG(0)
        LONG(0)
        . = ALIGN(16);
        *(.UserExceptionVector.text)
        LONG(0)
        LONG(0)
        LONG(0)
        LONG(0)
        . = ALIGN(16);
        *(.DoubleExceptionVector.text)
        LONG(0)
        LONG(0)
        LONG(0)
        LONG(0)
        . = ALIGN (16);
        *(.entry.text)
        *(.init.literal)
        *(.init)
        *(.literal .text .literal.* .text.* .stub .gnu.warning .gnu.linkonce.literal.* .gnu.linkonce.t.*.literal .gnu.linkonce.t.*)
        *(.fini.literal)
        *(.fini)
        *(.gnu.version)
        _text_end = ABSOLUTE(.);
        _etext = .;
    } >iram1_0_seg :iram1_0_phdr

    .lit4 : ALIGN(4)
    {
        _lit4_start = ABSOLUTE(.);
        *(*.lit4)
        *(.lit4.*)
        *(.gnu.linkonce.lit4.*)
        _lit4_end = ABSOLUTE(.);
    } >iram1_0_seg :iram1_0_phdr

    .data : ALIGN(4)
    {
        _data_start = ABSOLUTE(.);
        *(.data)
        *(.data.*)
        *(.gnu.linkonce.d.*)
        *(.data1)
        *(.sdata)
        *(.sdata.*)
        *(.gnu.linkonce.s.*)
        *(.sdata2)
        *(.sdata2.*)
        *(.gnu.linkonce.s2.*)
        *(.jcr)
        _data_end = ABSOLUTE(.);
    } >dram0_0_seg :dram0_0_phdr

    .rodata : ALIGN(4)
    {
        _rodata_start = ABSOLUTE(.);
        *(.rodata)
        *(.rodata.*)
        *(.gnu.linkonce.r.*)
        *(.rodata1)
        __XT_EXCEPTION_TABLE__ = ABSOLUTE(.);
        *(.xt_except_table)
        *(.gcc_except_table)
        *(.gnu.linkonce.e.*)
        *(.gnu.version_r)
        *(.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 */
        _bss_table_start = ABSOLUTE(.);
        LONG(_bss_start)
        LONG(_bss_end)
        _bss_table_end = ABSOLUTE(.);
        _rodata_end = ABSOLUTE(.);
    } >dram0_0_seg :dram0_0_phdr

    .bss ALIGN(8) (NOLOAD) : ALIGN(4)
    {
        . = ALIGN (8);
        _bss_start = ABSOLUTE(.);
        *(.dynsbss)
        *(.sbss)
        *(.sbss.*)
        *(.gnu.linkonce.sb.*)
        *(.scommon)
        *(.sbss2)
        *(.sbss2.*)
        *(.gnu.linkonce.sb2.*)
        *(.dynbss)
        *(.bss)
        *(.bss.*)
        *(.gnu.linkonce.b.*)
        *(COMMON)
        . = ALIGN (8);
        _bss_end = ABSOLUTE(.);
        _heap_start = ABSOLUTE(.);
    } >dram0_0_seg :dram0_0_bss_phdr
}

/* get ROM code address */
INCLUDE "eagle.rom.addr.v6.ld"