[136] | 1 | /* Linker script to configure memory regions.
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| 2 | * Need modifying for a specific board.
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| 3 | * FLASH.ORIGIN: starting address of flash
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| 4 | * FLASH.LENGTH: length of flash
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| 5 | * RAM.ORIGIN: starting address of RAM bank 0
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| 6 | * RAM.LENGTH: length of RAM bank 0
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| 7 | */
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| 8 | MEMORY
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| 9 | {
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| 10 | FLASH (rx) : ORIGIN = 0x00000000, LENGTH = 0x00040000
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| 11 | RAM (rwx) : ORIGIN = 0x20000000, LENGTH = 0x00008000
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| 12 | }
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| 13 |
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| 14 | /* Linker script to place sections and symbol values. Should be used together
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| 15 | * with other linker script that defines memory regions FLASH and RAM.
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| 16 | * It references following symbols, which must be defined in code:
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| 17 | * Reset_Handler : Entry of reset handler
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| 18 | *
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| 19 | * It defines following symbols, which code can use without definition:
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| 20 | * __exidx_start
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| 21 | * __exidx_end
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| 22 | * __copy_table_start__
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| 23 | * __copy_table_end__
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| 24 | * __zero_table_start__
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| 25 | * __zero_table_end__
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| 26 | * __etext
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| 27 | * __data_start__
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| 28 | * __preinit_array_start
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| 29 | * __preinit_array_end
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| 30 | * __init_array_start
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| 31 | * __init_array_end
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| 32 | * __fini_array_start
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| 33 | * __fini_array_end
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| 34 | * __data_end__
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| 35 | * __bss_start__
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| 36 | * __bss_end__
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| 37 | * __end__
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| 38 | * end
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| 39 | * __HeapLimit
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| 40 | * __StackLimit
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| 41 | * __StackTop
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| 42 | * __stack
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| 43 | */
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| 44 | ENTRY(Reset_Handler)
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| 45 |
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| 46 | SECTIONS
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| 47 | {
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| 48 | .text :
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| 49 | {
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| 50 | KEEP(*(.isr_vector))
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| 51 | *(.text*)
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| 52 |
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| 53 | KEEP(*(.init))
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| 54 | KEEP(*(.fini))
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| 55 |
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| 56 | /* .ctors */
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| 57 | *crtbegin.o(.ctors)
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| 58 | *crtbegin?.o(.ctors)
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| 59 | *(EXCLUDE_FILE(*crtend?.o *crtend.o) .ctors)
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| 60 | *(SORT(.ctors.*))
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| 61 | *(.ctors)
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| 62 |
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| 63 | /* .dtors */
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| 64 | *crtbegin.o(.dtors)
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| 65 | *crtbegin?.o(.dtors)
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| 66 | *(EXCLUDE_FILE(*crtend?.o *crtend.o) .dtors)
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| 67 | *(SORT(.dtors.*))
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| 68 | *(.dtors)
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| 69 |
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| 70 | *(.rodata*)
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| 71 |
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| 72 | KEEP(*(.eh_frame*))
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| 73 | } > FLASH
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| 74 |
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| 75 | .ARM.extab :
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| 76 | {
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| 77 | *(.ARM.extab* .gnu.linkonce.armextab.*)
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| 78 | } > FLASH
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| 79 |
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| 80 | __exidx_start = .;
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| 81 | .ARM.exidx :
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| 82 | {
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| 83 | *(.ARM.exidx* .gnu.linkonce.armexidx.*)
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| 84 | } > FLASH
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| 85 | __exidx_end = .;
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| 86 |
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| 87 | /* To copy multiple ROM to RAM sections,
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| 88 | * uncomment .copy.table section and,
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| 89 | * define __STARTUP_COPY_MULTIPLE in startup_ARMCMx.S */
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| 90 | /*
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| 91 | .copy.table :
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| 92 | {
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| 93 | . = ALIGN(4);
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| 94 | __copy_table_start__ = .;
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| 95 | LONG (__etext)
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| 96 | LONG (__data_start__)
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| 97 | LONG (__data_end__ - __data_start__)
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| 98 | LONG (__etext2)
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| 99 | LONG (__data2_start__)
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| 100 | LONG (__data2_end__ - __data2_start__)
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| 101 | __copy_table_end__ = .;
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| 102 | } > FLASH
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| 103 | */
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| 104 |
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| 105 | /* To clear multiple BSS sections,
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| 106 | * uncomment .zero.table section and,
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| 107 | * define __STARTUP_CLEAR_BSS_MULTIPLE in startup_ARMCMx.S */
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| 108 | /*
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| 109 | .zero.table :
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| 110 | {
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| 111 | . = ALIGN(4);
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| 112 | __zero_table_start__ = .;
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| 113 | LONG (__bss_start__)
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| 114 | LONG (__bss_end__ - __bss_start__)
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| 115 | LONG (__bss2_start__)
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| 116 | LONG (__bss2_end__ - __bss2_start__)
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| 117 | __zero_table_end__ = .;
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| 118 | } > FLASH
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| 119 | */
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| 120 |
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| 121 | __etext = .;
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| 122 |
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| 123 | .data : AT (__etext)
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| 124 | {
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| 125 | __data_start__ = .;
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| 126 | *(vtable)
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| 127 | *(.data*)
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| 128 |
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| 129 | . = ALIGN(4);
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| 130 | /* preinit data */
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| 131 | PROVIDE_HIDDEN (__preinit_array_start = .);
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| 132 | KEEP(*(.preinit_array))
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| 133 | PROVIDE_HIDDEN (__preinit_array_end = .);
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| 134 |
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| 135 | . = ALIGN(4);
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| 136 | /* init data */
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| 137 | PROVIDE_HIDDEN (__init_array_start = .);
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| 138 | KEEP(*(SORT(.init_array.*)))
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| 139 | KEEP(*(.init_array))
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| 140 | PROVIDE_HIDDEN (__init_array_end = .);
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| 141 |
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| 142 |
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| 143 | . = ALIGN(4);
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| 144 | /* finit data */
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| 145 | PROVIDE_HIDDEN (__fini_array_start = .);
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| 146 | KEEP(*(SORT(.fini_array.*)))
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| 147 | KEEP(*(.fini_array))
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| 148 | PROVIDE_HIDDEN (__fini_array_end = .);
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| 149 |
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| 150 | KEEP(*(.jcr*))
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| 151 | . = ALIGN(4);
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| 152 | /* All data end */
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| 153 | __data_end__ = .;
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| 154 |
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| 155 | } > RAM
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| 156 |
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| 157 | .bss :
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| 158 | {
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| 159 | . = ALIGN(4);
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| 160 | __bss_start__ = .;
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| 161 | *(.bss*)
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| 162 | *(COMMON)
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| 163 | . = ALIGN(4);
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| 164 | __bss_end__ = .;
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| 165 | } > RAM
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| 166 |
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| 167 | .heap (COPY):
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| 168 | {
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| 169 | __end__ = .;
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| 170 | PROVIDE(end = .);
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| 171 | *(.heap*)
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| 172 | __HeapLimit = .;
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| 173 | } > RAM
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| 174 |
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| 175 | /* .stack_dummy section doesn't contains any symbols. It is only
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| 176 | * used for linker to calculate size of stack sections, and assign
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| 177 | * values to stack symbols later */
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| 178 | .stack_dummy (COPY):
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| 179 | {
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| 180 | *(.stack*)
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| 181 | } > RAM
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| 182 |
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| 183 | /* Set stack top to end of RAM, and stack limit move down by
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| 184 | * size of stack_dummy section */
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| 185 | __StackTop = ORIGIN(RAM) + LENGTH(RAM) ;
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| 186 | __StackLimit = __StackTop - SIZEOF(.stack_dummy);
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| 187 | PROVIDE(__stack = __StackTop);
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| 188 |
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| 189 | __ram_end__ = ORIGIN(RAM) + LENGTH(RAM) -1 ;
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| 190 |
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| 191 | /* Check if data + heap + stack exceeds RAM limit */
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| 192 | ASSERT(__StackLimit >= __HeapLimit, "region RAM overflowed with stack")
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| 193 | }
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