1/* Deprecated linker script for Nordic Semiconductor nRF52 devices, 2 * please use nrfx_common.ld. This version exists for backwards 3 * compatibility. 4 * 5 * Version: Sourcery G++ 4.5-1 6 * Support: https://support.codesourcery.com/GNUToolchain/ 7 * 8 * Copyright (c) 2007, 2008, 2009, 2010 CodeSourcery, Inc. 9 * 10 * The authors hereby grant permission to use, copy, modify, distribute, 11 * and license this software and its documentation for any purpose, provided 12 * that existing copyright notices are retained in all copies and that this 13 * notice is included verbatim in any distributions. No written agreement, 14 * license, or royalty fee is required for any of the authorized uses. 15 * Modifications to this software may be copyrighted by their authors 16 * and need not follow the licensing terms described here, provided that 17 * the new terms are clearly indicated on the first page of each file where 18 * they apply. 19 */ 20OUTPUT_FORMAT ("elf32-littlearm", "elf32-bigarm", "elf32-littlearm") 21 22/* Linker script to place sections and symbol values. Should be used together 23 * with other linker script that defines memory regions FLASH and RAM. 24 * It references following symbols, which must be defined in code: 25 * Reset_Handler : Entry of reset handler 26 * 27 * It defines following symbols, which code can use without definition: 28 * __exidx_start 29 * __exidx_end 30 * __etext 31 * __data_start__ 32 * __preinit_array_start 33 * __preinit_array_end 34 * __init_array_start 35 * __init_array_end 36 * __fini_array_start 37 * __fini_array_end 38 * __data_end__ 39 * __bss_start__ 40 * __bss_end__ 41 * __end__ 42 * end 43 * __HeapBase 44 * __HeapLimit 45 * __StackLimit 46 * __StackTop 47 * __stack 48 */ 49ENTRY(Reset_Handler) 50 51SECTIONS 52{ 53 .text : 54 { 55 KEEP(*(.isr_vector)) 56 *(.text*) 57 58 KEEP(*(.init)) 59 KEEP(*(.fini)) 60 61 /* .ctors */ 62 *crtbegin.o(.ctors) 63 *crtbegin?.o(.ctors) 64 *(EXCLUDE_FILE(*crtend?.o *crtend.o) .ctors) 65 *(SORT(.ctors.*)) 66 *(.ctors) 67 68 /* .dtors */ 69 *crtbegin.o(.dtors) 70 *crtbegin?.o(.dtors) 71 *(EXCLUDE_FILE(*crtend?.o *crtend.o) .dtors) 72 *(SORT(.dtors.*)) 73 *(.dtors) 74 75 *(.rodata*) 76 77 KEEP(*(.eh_frame*)) 78 } > FLASH 79 80 .ARM.extab : 81 { 82 *(.ARM.extab* .gnu.linkonce.armextab.*) 83 } > FLASH 84 85 __exidx_start = .; 86 .ARM.exidx : 87 { 88 *(.ARM.exidx* .gnu.linkonce.armexidx.*) 89 } > FLASH 90 __exidx_end = .; 91 92 __etext = .; 93 94 .data : AT (__etext) 95 { 96 __data_start__ = .; 97 *(vtable) 98 *(.data*) 99 100 . = ALIGN(4); 101 /* preinit data */ 102 PROVIDE_HIDDEN (__preinit_array_start = .); 103 KEEP(*(.preinit_array)) 104 PROVIDE_HIDDEN (__preinit_array_end = .); 105 106 . = ALIGN(4); 107 /* init data */ 108 PROVIDE_HIDDEN (__init_array_start = .); 109 KEEP(*(SORT(.init_array.*))) 110 KEEP(*(.init_array)) 111 PROVIDE_HIDDEN (__init_array_end = .); 112 113 114 . = ALIGN(4); 115 /* finit data */ 116 PROVIDE_HIDDEN (__fini_array_start = .); 117 KEEP(*(SORT(.fini_array.*))) 118 KEEP(*(.fini_array)) 119 PROVIDE_HIDDEN (__fini_array_end = .); 120 121 KEEP(*(.jcr*)) 122 . = ALIGN(4); 123 /* All data end */ 124 __data_end__ = .; 125 126 } > RAM 127 128 .bss : 129 { 130 . = ALIGN(4); 131 __bss_start__ = .; 132 *(.bss*) 133 *(COMMON) 134 . = ALIGN(4); 135 __bss_end__ = .; 136 } > RAM 137 138 .heap (COPY): 139 { 140 __HeapBase = .; 141 __end__ = .; 142 PROVIDE(end = .); 143 KEEP(*(.heap*)) 144 __HeapLimit = .; 145 } > RAM 146 147 /* .stack_dummy section doesn't contains any symbols. It is only 148 * used for linker to calculate size of stack sections, and assign 149 * values to stack symbols later */ 150 .stack_dummy (COPY): 151 { 152 KEEP(*(.stack*)) 153 } > RAM 154 155 /* Set stack top to end of RAM, and stack limit move down by 156 * size of stack_dummy section */ 157 __StackTop = ORIGIN(RAM) + LENGTH(RAM); 158 __StackLimit = __StackTop - SIZEOF(.stack_dummy); 159 PROVIDE(__stack = __StackTop); 160 161 /* Check if data + heap + stack exceeds RAM limit */ 162 ASSERT(__StackLimit >= __HeapLimit, "region RAM overflowed with stack") 163 164 /* Check if text sections + data exceeds FLASH limit */ 165 DataInitFlashUsed = __bss_start__ - __data_start__; 166 CodeFlashUsed = __etext - ORIGIN(FLASH); 167 TotalFlashUsed = CodeFlashUsed + DataInitFlashUsed; 168 ASSERT(TotalFlashUsed <= LENGTH(FLASH), "region FLASH overflowed with .data and user data") 169 170} 171