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| 1 | +/* |
| 2 | + * Copyright (c) 2015 ARM Limited |
| 3 | + * |
| 4 | + * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | + * you may not use this file except in compliance with the License. |
| 6 | + * You may obtain a copy of the License at |
| 7 | + * |
| 8 | + * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | + * |
| 10 | + * Unless required by applicable law or agreed to in writing, software |
| 11 | + * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | + * See the License for the specific language governing permissions and |
| 14 | + * limitations under the License. |
| 15 | + */ |
| 16 | + |
| 17 | +/* Linker script to configure memory regions. */ |
| 18 | + |
| 19 | +MEMORY |
| 20 | +{ |
| 21 | + FLASH (rx) : ORIGIN = 0x1C000, LENGTH = 0x64000 |
| 22 | + RAM (rwx) : ORIGIN = 0x20002ef8, LENGTH = 0xd108 |
| 23 | +} |
| 24 | + |
| 25 | + |
| 26 | +OUTPUT_FORMAT ("elf32-littlearm", "elf32-bigarm", "elf32-littlearm") |
| 27 | + |
| 28 | +/* Linker script to place sections and symbol values. Should be used together |
| 29 | + * with the other linker script that defines memory regions FLASH and RAM. |
| 30 | + * It references the following symbols that must be defined in code: |
| 31 | + * Reset_Handler : Entry of reset handler |
| 32 | + * |
| 33 | + * It defines the following symbols that the code can use without definition: |
| 34 | + * __exidx_start |
| 35 | + * __exidx_end |
| 36 | + * __etext |
| 37 | + * __data_start__ |
| 38 | + * __preinit_array_start |
| 39 | + * __preinit_array_end |
| 40 | + * __init_array_start |
| 41 | + * __init_array_end |
| 42 | + * __fini_array_start |
| 43 | + * __fini_array_end |
| 44 | + * __data_end__ |
| 45 | + * __bss_start__ |
| 46 | + * __bss_end__ |
| 47 | + * __end__ |
| 48 | + * end |
| 49 | + * __HeapLimit |
| 50 | + * __StackLimit |
| 51 | + * __StackTop |
| 52 | + * __stack |
| 53 | + */ |
| 54 | +ENTRY(Reset_Handler) |
| 55 | + |
| 56 | + |
| 57 | +SECTIONS |
| 58 | +{ |
| 59 | + .text : |
| 60 | + { |
| 61 | + KEEP(*(.Vectors)) |
| 62 | + *(.text*) |
| 63 | + |
| 64 | + KEEP(*(.init)) |
| 65 | + KEEP(*(.fini)) |
| 66 | + |
| 67 | + /* .ctors */ |
| 68 | + *crtbegin.o(.ctors) |
| 69 | + *crtbegin?.o(.ctors) |
| 70 | + *(EXCLUDE_FILE(*crtend?.o *crtend.o) .ctors) |
| 71 | + *(SORT(.ctors.*)) |
| 72 | + *(.ctors) |
| 73 | + |
| 74 | + /* .dtors */ |
| 75 | + *crtbegin.o(.dtors) |
| 76 | + *crtbegin?.o(.dtors) |
| 77 | + *(EXCLUDE_FILE(*crtend?.o *crtend.o) .dtors) |
| 78 | + *(SORT(.dtors.*)) |
| 79 | + *(.dtors) |
| 80 | + |
| 81 | + *(.rodata*) |
| 82 | + |
| 83 | + KEEP(*(.eh_frame*)) |
| 84 | + } > FLASH |
| 85 | + |
| 86 | + |
| 87 | + .ARM.extab : |
| 88 | + { |
| 89 | + *(.ARM.extab* .gnu.linkonce.armextab.*) |
| 90 | + . = ALIGN(4); |
| 91 | + } > FLASH |
| 92 | + |
| 93 | + __exidx_start = .; |
| 94 | + .ARM.exidx : |
| 95 | + { |
| 96 | + *(.ARM.exidx* .gnu.linkonce.armexidx.*) |
| 97 | + . = ALIGN(4); |
| 98 | + } > FLASH |
| 99 | + __exidx_end = .; |
| 100 | + |
| 101 | + __etext = .; |
| 102 | + |
| 103 | + .data : AT (__etext) |
| 104 | + { |
| 105 | + __data_start__ = .; |
| 106 | + *(vtable) |
| 107 | + *(.data*) |
| 108 | + |
| 109 | + . = ALIGN(4); |
| 110 | + /* preinit data */ |
| 111 | + PROVIDE_HIDDEN (__preinit_array_start = .); |
| 112 | + KEEP(*(.preinit_array)) |
| 113 | + PROVIDE_HIDDEN (__preinit_array_end = .); |
| 114 | + |
| 115 | + . = ALIGN(4); |
| 116 | + /* init data */ |
| 117 | + PROVIDE_HIDDEN (__init_array_start = .); |
| 118 | + KEEP(*(SORT(.init_array.*))) |
| 119 | + KEEP(*(.init_array)) |
| 120 | + PROVIDE_HIDDEN (__init_array_end = .); |
| 121 | + |
| 122 | + |
| 123 | + . = ALIGN(4); |
| 124 | + /* finit data */ |
| 125 | + PROVIDE_HIDDEN (__fini_array_start = .); |
| 126 | + KEEP(*(SORT(.fini_array.*))) |
| 127 | + KEEP(*(.fini_array)) |
| 128 | + PROVIDE_HIDDEN (__fini_array_end = .); |
| 129 | + |
| 130 | + *(.jcr) |
| 131 | + . = ALIGN(4); |
| 132 | + /* All data end */ |
| 133 | + __data_end__ = .; |
| 134 | + |
| 135 | + } > RAM |
| 136 | + |
| 137 | + __edata = .; |
| 138 | + |
| 139 | + .fs_data : |
| 140 | + { |
| 141 | + PROVIDE(__start_fs_data = .); |
| 142 | + KEEP(*(.fs_data)) |
| 143 | + PROVIDE(__stop_fs_data = .); |
| 144 | + } > RAM |
| 145 | + |
| 146 | + .bss : |
| 147 | + { |
| 148 | + . = ALIGN(4); |
| 149 | + __bss_start__ = .; |
| 150 | + *(.bss*) |
| 151 | + *(COMMON) |
| 152 | + . = ALIGN(4); |
| 153 | + __bss_end__ = .; |
| 154 | + } > RAM |
| 155 | + |
| 156 | + .heap (NOLOAD): |
| 157 | + { |
| 158 | + __end__ = .; |
| 159 | + end = __end__; |
| 160 | + *(.heap*); |
| 161 | + |
| 162 | + /* Expand the heap to reach the stack boundary. */ |
| 163 | + ASSERT(. <= (ORIGIN(RAM) + LENGTH(RAM) - 0x800), "heap region overflowed into stack"); |
| 164 | + . += (ORIGIN(RAM) + LENGTH(RAM) - 0x800) - .; |
| 165 | + } > RAM |
| 166 | + PROVIDE(__heap_start = ADDR(.heap)); |
| 167 | + PROVIDE(__heap_size = SIZEOF(.heap)); |
| 168 | + PROVIDE(__mbed_sbrk_start = ADDR(.heap)); |
| 169 | + PROVIDE(__mbed_krbs_start = ADDR(.heap) + SIZEOF(.heap)); |
| 170 | + |
| 171 | + /* .stack_dummy section does not contain any symbols. It is only |
| 172 | + * used for the linker script to calculate the size of stack sections |
| 173 | + * and assign values to stack symbols later. */ |
| 174 | + .stack (NOLOAD): |
| 175 | + { |
| 176 | + __StackLimit = .; |
| 177 | + *(.stack*) |
| 178 | + . += (ORIGIN(RAM) + LENGTH(RAM) - .); |
| 179 | + } > RAM |
| 180 | + |
| 181 | + /* Set the stack top to the end of RAM and move down the stack limit by |
| 182 | + * the size of the stack_dummy section. */ |
| 183 | + __StackTop = ORIGIN(RAM) + LENGTH(RAM); |
| 184 | + __StackLimit = __StackTop - SIZEOF(.stack); |
| 185 | + PROVIDE(__stack = __StackTop); |
| 186 | +} |
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