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1 /*
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2 *****************************************************************************
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3 **
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4
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5 ** File : stm32_flash.ld
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6 **
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7 ** Abstract : Linker script for STM32L476RG Device with
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8 ** 1024KByte FLASH, 96KByte RAM
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9 **
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10 ** Set heap size, stack size and stack location according
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11 ** to application requirements.
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12 **
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13 ** Set memory bank area and size if external memory is used.
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14 **
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15 ** Target : STMicroelectronics STM32
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16 **
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17 ** Environment : Atollic TrueSTUDIO(R)
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18 **
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19 ** Distribution: The file is distributed as is, without any warranty
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20 ** of any kind.
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21 **
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22 ** (c)Copyright Atollic AB.
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23 ** You may use this file as-is or modify it according to the needs of your
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24 ** project. This file may only be built (assembled or compiled and linked)
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25 ** using the Atollic TrueSTUDIO(R) product. The use of this file together
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26 ** with other tools than Atollic TrueSTUDIO(R) is not permitted.
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27 **
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28 *****************************************************************************
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29 */
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30
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31 /* Entry Point */
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32 ENTRY(Reset_Handler)
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33
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34 /* Highest address of the user mode stack */
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35 _estack = 0x20018000; /* end of RAM */
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36 /* Generate a link error if heap and stack don't fit into RAM */
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37 _Min_Heap_Size = 0x200; /* required amount of heap */
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38 _Min_Stack_Size = 0x400; /* required amount of stack */
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39
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40 /* Specify the memory areas */
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41 MEMORY
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42 {
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43 RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 96K
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44 RAM2 (xrw) : ORIGIN = 0x10000000, LENGTH = 32K
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45 FLASH (rx) : ORIGIN = 0x8000000, LENGTH = 1024K
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46 }
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47
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48 /* Define output sections */
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49 SECTIONS
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50 {
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51 /* The startup code goes first into FLASH */
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52 .isr_vector :
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53 {
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54 . = ALIGN(4);
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55 KEEP(*(.isr_vector)) /* Startup code */
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56 . = ALIGN(4);
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57 } >FLASH
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58
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59 /* The program code and other data goes into FLASH */
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60 .text :
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61 {
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62 . = ALIGN(4);
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63 *(.text) /* .text sections (code) */
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64 *(.text*) /* .text* sections (code) */
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65 *(.glue_7) /* glue arm to thumb code */
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66 *(.glue_7t) /* glue thumb to arm code */
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67 *(.eh_frame)
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68
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69 KEEP (*(.init))
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70 KEEP (*(.fini))
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71
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72 . = ALIGN(4);
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73 _etext = .; /* define a global symbols at end of code */
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74 } >FLASH
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75
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76 /* Constant data goes into FLASH */
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77 .rodata :
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78 {
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79 . = ALIGN(4);
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80 *(.rodata) /* .rodata sections (constants, strings, etc.) */
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81 *(.rodata*) /* .rodata* sections (constants, strings, etc.) */
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82 . = ALIGN(4);
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83 } >FLASH
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84
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85 .ARM.extab : { *(.ARM.extab* .gnu.linkonce.armextab.*) } >FLASH
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86 .ARM : {
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87 __exidx_start = .;
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88 *(.ARM.exidx*)
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89 __exidx_end = .;
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90 } >FLASH
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91
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92 .preinit_array :
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93 {
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94 PROVIDE_HIDDEN (__preinit_array_start = .);
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95 KEEP (*(.preinit_array*))
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96 PROVIDE_HIDDEN (__preinit_array_end = .);
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97 } >FLASH
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98 .init_array :
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99 {
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100 PROVIDE_HIDDEN (__init_array_start = .);
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101 KEEP (*(SORT(.init_array.*)))
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102 KEEP (*(.init_array*))
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103 PROVIDE_HIDDEN (__init_array_end = .);
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104 } >FLASH
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105 .fini_array :
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106 {
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107 PROVIDE_HIDDEN (__fini_array_start = .);
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108 KEEP (*(SORT(.fini_array.*)))
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109 KEEP (*(.fini_array*))
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110 PROVIDE_HIDDEN (__fini_array_end = .);
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111 } >FLASH
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112
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113 /* used by the startup to initialize data */
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114 _sidata = LOADADDR(.data);
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115
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116 /* Initialized data sections goes into RAM, load LMA copy after code */
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117 .data :
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118 {
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119 . = ALIGN(4);
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120 _sdata = .; /* create a global symbol at data start */
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121 *(.data) /* .data sections */
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122 *(.data*) /* .data* sections */
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123
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124 . = ALIGN(4);
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125 _edata = .; /* define a global symbol at data end */
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126 } >RAM AT> FLASH
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127
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128
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129 /* Uninitialized data section */
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130 . = ALIGN(4);
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131 .bss :
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132 {
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133 /* This is used by the startup in order to initialize the .bss secion */
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134 _sbss = .; /* define a global symbol at bss start */
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135 __bss_start__ = _sbss;
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136 *(.bss)
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137 *(.bss*)
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138 *(COMMON)
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139
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140 . = ALIGN(4);
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141 _ebss = .; /* define a global symbol at bss end */
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142 __bss_end__ = _ebss;
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143 } >RAM
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144
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145 /* User_heap_stack section, used to check that there is enough RAM left */
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146 ._user_heap_stack :
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147 {
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148 . = ALIGN(4);
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149 PROVIDE ( end = . );
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150 PROVIDE ( _end = . );
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151 . = . + _Min_Heap_Size;
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152 . = . + _Min_Stack_Size;
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153 . = ALIGN(4);
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154 } >RAM
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155
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156
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157
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158 /* Remove information from the standard libraries */
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159 /DISCARD/ :
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160 {
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161 libc.a ( * )
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162 libm.a ( * )
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163 libgcc.a ( * )
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164 }
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165
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166 .ARM.attributes 0 : { *(.ARM.attributes) }
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167 }
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168
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169
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