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109 lines
2.6 KiB
109 lines
2.6 KiB
/* Linker script for the ESP8266 */
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MEMORY
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{
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/* Data RAM. Allows byte access. */
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DRAM (rw) : ORIGIN = 0x3FFE8000, LENGTH = 80K
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/* Instruction RAM. */
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IRAM (x) : ORIGIN = 0x40100000, LENGTH = 32K
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}
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/* The entry point. It is set in the image flashed to the chip, so must be
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* defined.
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*/
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ENTRY(main)
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SECTIONS
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{
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/* Mutable global variables.
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*/
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.data : ALIGN(4)
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{
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_sdata = ABSOLUTE(.);
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*(.data)
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*(.data.*)
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} >DRAM
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/* Constant global variables.
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* Note that they still need to be loaded in RAM because the ESP8266 doesn't
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* allow byte access to flash.
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*/
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.rodata : ALIGN(4)
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{
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*(.rodata)
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*(.rodata.*)
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} >DRAM
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/* Global variables that are mutable and zero-initialized.
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*/
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.bss (NOLOAD) : ALIGN(4)
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{
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. = ALIGN (4);
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_sbss = ABSOLUTE(.);
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*(.bss)
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*(.bss.*)
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. = ALIGN (4);
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_ebss = ABSOLUTE(.);
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} >DRAM
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/* Constant literals and code. Loaded into IRAM for now. Eventually, most
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* code should be executed directly from flash.
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* Note that literals must be before code for the l32r instruction to work.
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*/
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.text : ALIGN(4)
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{
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*(.literal .text)
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*(.literal.* .text.*)
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} >IRAM
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}
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_globals_start = _sdata;
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_globals_end = _ebss;
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_heap_start = _ebss;
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_heap_end = ORIGIN(DRAM) + LENGTH(DRAM);
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/* It appears that the stack is set to 0x3ffffff0 when main is called.
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* Be conservative and scan all the way up to the end of the RAM.
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*/
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_stack_top = 0x40000000;
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/* Functions normally provided by a libc.
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* Source:
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* https://github.com/espressif/ESP8266_NONOS_SDK/blob/master/ld/eagle.rom.addr.v6.ld
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*/
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memcpy = 0x4000df48;
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memmove = 0x4000e04c;
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memset = 0x4000e190;
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/* Compiler runtime functions provided by the ROM.
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* Source:
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* https://github.com/espressif/ESP8266_NONOS_SDK/blob/master/ld/eagle.rom.addr.v6.ld
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*/
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__adddf3 = 0x4000c538;
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__addsf3 = 0x4000c180;
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__divdf3 = 0x4000cb94;
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__divdi3 = 0x4000ce60;
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__divsi3 = 0x4000dc88;
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__extendsfdf2 = 0x4000cdfc;
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__fixdfsi = 0x4000ccb8;
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__fixunsdfsi = 0x4000cd00;
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__fixunssfsi = 0x4000c4c4;
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__floatsidf = 0x4000e2f0;
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__floatsisf = 0x4000e2ac;
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__floatunsidf = 0x4000e2e8;
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__floatunsisf = 0x4000e2a4;
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__muldf3 = 0x4000c8f0;
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__muldi3 = 0x40000650;
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__mulsf3 = 0x4000c3dc;
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__subdf3 = 0x4000c688;
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__subsf3 = 0x4000c268;
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__truncdfsf2 = 0x4000cd5c;
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__udivdi3 = 0x4000d310;
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__udivsi3 = 0x4000e21c;
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__umoddi3 = 0x4000d770;
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__umodsi3 = 0x4000e268;
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__umulsidi3 = 0x4000dcf0;
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/* Proprietary ROM function needed for proper clock configuration.
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*/
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rom_i2c_writeReg = 0x400072d8;
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