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LPC1768/GCC_ARM/LPC1768.ld@44:24d45a770a51, 2012-11-21 (annotated)

Committer:
emilmont
Date:
Wed Nov 21 10:49:56 2012 +0000
Revision:
44:24d45a770a51
Parent:
41:10b9abbe79a6 
Complete refactoring of the mbed library to move the target dependent code to a thin well defined layer, defining a proper object oriented C API to be implemented by the different silicon vendors.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
emilio.monti@arm.com 41:10b9abbe79a6 1 /* Linker script for mbed LPC1768 */
emilio.monti@arm.com 41:10b9abbe79a6 2
emilio.monti@arm.com 41:10b9abbe79a6 3 /* Linker script to configure memory regions. */
emilio.monti@arm.com 41:10b9abbe79a6 4 MEMORY
emilio.monti@arm.com 41:10b9abbe79a6 5 {
emilio.monti@arm.com 41:10b9abbe79a6 6 FLASH (rx) : ORIGIN = 0x00000000, LENGTH = 512K
emilio.monti@arm.com 41:10b9abbe79a6 7 RAM (rwx) : ORIGIN = 0x100000C8, LENGTH = 0x7F38
emilio.monti@arm.com 41:10b9abbe79a6 8
emilio.monti@arm.com 41:10b9abbe79a6 9 USB_RAM(rwx) : ORIGIN = 0x2007C000, LENGTH = 16K
emilio.monti@arm.com 41:10b9abbe79a6 10 ETH_RAM(rwx) : ORIGIN = 0x20080000, LENGTH = 16K
emilio.monti@arm.com 41:10b9abbe79a6 11 }
emilio.monti@arm.com 41:10b9abbe79a6 12
emilio.monti@arm.com 41:10b9abbe79a6 13 /* Linker script to place sections and symbol values. Should be used together
emilio.monti@arm.com 41:10b9abbe79a6 14 * with other linker script that defines memory regions FLASH and RAM.
emilio.monti@arm.com 41:10b9abbe79a6 15 * It references following symbols, which must be defined in code:
emilio.monti@arm.com 41:10b9abbe79a6 16 * Reset_Handler : Entry of reset handler
emilio.monti@arm.com 41:10b9abbe79a6 17 *
emilio.monti@arm.com 41:10b9abbe79a6 18 * It defines following symbols, which code can use without definition:
emilio.monti@arm.com 41:10b9abbe79a6 19 * __exidx_start
emilio.monti@arm.com 41:10b9abbe79a6 20 * __exidx_end
emilio.monti@arm.com 41:10b9abbe79a6 21 * __etext
emilio.monti@arm.com 41:10b9abbe79a6 22 * __data_start__
emilio.monti@arm.com 41:10b9abbe79a6 23 * __preinit_array_start
emilio.monti@arm.com 41:10b9abbe79a6 24 * __preinit_array_end
emilio.monti@arm.com 41:10b9abbe79a6 25 * __init_array_start
emilio.monti@arm.com 41:10b9abbe79a6 26 * __init_array_end
emilio.monti@arm.com 41:10b9abbe79a6 27 * __fini_array_start
emilio.monti@arm.com 41:10b9abbe79a6 28 * __fini_array_end
emilio.monti@arm.com 41:10b9abbe79a6 29 * __data_end__
emilio.monti@arm.com 41:10b9abbe79a6 30 * __bss_start__
emilio.monti@arm.com 41:10b9abbe79a6 31 * __bss_end__
emilio.monti@arm.com 41:10b9abbe79a6 32 * __end__
emilio.monti@arm.com 41:10b9abbe79a6 33 * end
emilio.monti@arm.com 41:10b9abbe79a6 34 * __HeapLimit
emilio.monti@arm.com 41:10b9abbe79a6 35 * __StackLimit
emilio.monti@arm.com 41:10b9abbe79a6 36 * __StackTop
emilio.monti@arm.com 41:10b9abbe79a6 37 * __stack
emilio.monti@arm.com 41:10b9abbe79a6 38 */
emilio.monti@arm.com 41:10b9abbe79a6 39 ENTRY(Reset_Handler)
emilio.monti@arm.com 41:10b9abbe79a6 40
emilio.monti@arm.com 41:10b9abbe79a6 41 SECTIONS
emilio.monti@arm.com 41:10b9abbe79a6 42 {
emilio.monti@arm.com 41:10b9abbe79a6 43 .text :
emilio.monti@arm.com 41:10b9abbe79a6 44 {
emilio.monti@arm.com 41:10b9abbe79a6 45 KEEP(*(.isr_vector))
emilio.monti@arm.com 41:10b9abbe79a6 46 *(.text*)
emilio.monti@arm.com 41:10b9abbe79a6 47
emilio.monti@arm.com 41:10b9abbe79a6 48 KEEP(*(.init))
emilio.monti@arm.com 41:10b9abbe79a6 49 KEEP(*(.fini))
emilio.monti@arm.com 41:10b9abbe79a6 50
emilio.monti@arm.com 41:10b9abbe79a6 51 /* .ctors */
emilio.monti@arm.com 41:10b9abbe79a6 52 *crtbegin.o(.ctors)
emilio.monti@arm.com 41:10b9abbe79a6 53 *crtbegin?.o(.ctors)
emilio.monti@arm.com 41:10b9abbe79a6 54 *(EXCLUDE_FILE(*crtend?.o *crtend.o) .ctors)
emilio.monti@arm.com 41:10b9abbe79a6 55 *(SORT(.ctors.*))
emilio.monti@arm.com 41:10b9abbe79a6 56 *(.ctors)
emilio.monti@arm.com 41:10b9abbe79a6 57
emilio.monti@arm.com 41:10b9abbe79a6 58 /* .dtors */
emilio.monti@arm.com 41:10b9abbe79a6 59 *crtbegin.o(.dtors)
emilio.monti@arm.com 41:10b9abbe79a6 60 *crtbegin?.o(.dtors)
emilio.monti@arm.com 41:10b9abbe79a6 61 *(EXCLUDE_FILE(*crtend?.o *crtend.o) .dtors)
emilio.monti@arm.com 41:10b9abbe79a6 62 *(SORT(.dtors.*))
emilio.monti@arm.com 41:10b9abbe79a6 63 *(.dtors)
emilio.monti@arm.com 41:10b9abbe79a6 64
emilio.monti@arm.com 41:10b9abbe79a6 65 *(.rodata*)
emilio.monti@arm.com 41:10b9abbe79a6 66
emilio.monti@arm.com 41:10b9abbe79a6 67 KEEP(*(.eh_frame*))
emilio.monti@arm.com 41:10b9abbe79a6 68 } > FLASH
emilio.monti@arm.com 41:10b9abbe79a6 69
emilio.monti@arm.com 41:10b9abbe79a6 70 .ARM.extab :
emilio.monti@arm.com 41:10b9abbe79a6 71 {
emilio.monti@arm.com 41:10b9abbe79a6 72 *(.ARM.extab* .gnu.linkonce.armextab.*)
emilio.monti@arm.com 41:10b9abbe79a6 73 } > FLASH
emilio.monti@arm.com 41:10b9abbe79a6 74
emilio.monti@arm.com 41:10b9abbe79a6 75 __exidx_start = .;
emilio.monti@arm.com 41:10b9abbe79a6 76 .ARM.exidx :
emilio.monti@arm.com 41:10b9abbe79a6 77 {
emilio.monti@arm.com 41:10b9abbe79a6 78 *(.ARM.exidx* .gnu.linkonce.armexidx.*)
emilio.monti@arm.com 41:10b9abbe79a6 79 } > FLASH
emilio.monti@arm.com 41:10b9abbe79a6 80 __exidx_end = .;
emilio.monti@arm.com 41:10b9abbe79a6 81
emilio.monti@arm.com 41:10b9abbe79a6 82 __etext = .;
emilio.monti@arm.com 41:10b9abbe79a6 83
emilio.monti@arm.com 41:10b9abbe79a6 84 .data : AT (__etext)
emilio.monti@arm.com 41:10b9abbe79a6 85 {
emilio.monti@arm.com 41:10b9abbe79a6 86 __data_start__ = .;
emilio.monti@arm.com 41:10b9abbe79a6 87 *(vtable)
emilio.monti@arm.com 41:10b9abbe79a6 88 *(.data*)
emilio.monti@arm.com 41:10b9abbe79a6 89
emilio.monti@arm.com 41:10b9abbe79a6 90 . = ALIGN(4);
emilio.monti@arm.com 41:10b9abbe79a6 91 /* preinit data */
emilio.monti@arm.com 41:10b9abbe79a6 92 PROVIDE (__preinit_array_start = .);
emilio.monti@arm.com 41:10b9abbe79a6 93 KEEP(*(.preinit_array))
emilio.monti@arm.com 41:10b9abbe79a6 94 PROVIDE (__preinit_array_end = .);
emilio.monti@arm.com 41:10b9abbe79a6 95
emilio.monti@arm.com 41:10b9abbe79a6 96 . = ALIGN(4);
emilio.monti@arm.com 41:10b9abbe79a6 97 /* init data */
emilio.monti@arm.com 41:10b9abbe79a6 98 PROVIDE (__init_array_start = .);
emilio.monti@arm.com 41:10b9abbe79a6 99 KEEP(*(SORT(.init_array.*)))
emilio.monti@arm.com 41:10b9abbe79a6 100 KEEP(*(.init_array))
emilio.monti@arm.com 41:10b9abbe79a6 101 PROVIDE (__init_array_end = .);
emilio.monti@arm.com 41:10b9abbe79a6 102
emilio.monti@arm.com 41:10b9abbe79a6 103
emilio.monti@arm.com 41:10b9abbe79a6 104 . = ALIGN(4);
emilio.monti@arm.com 41:10b9abbe79a6 105 /* finit data */
emilio.monti@arm.com 41:10b9abbe79a6 106 PROVIDE (__fini_array_start = .);
emilio.monti@arm.com 41:10b9abbe79a6 107 KEEP(*(SORT(.fini_array.*)))
emilio.monti@arm.com 41:10b9abbe79a6 108 KEEP(*(.fini_array))
emilio.monti@arm.com 41:10b9abbe79a6 109 PROVIDE (__fini_array_end = .);
emilio.monti@arm.com 41:10b9abbe79a6 110
emilio.monti@arm.com 41:10b9abbe79a6 111 . = ALIGN(4);
emilio.monti@arm.com 41:10b9abbe79a6 112 /* All data end */
emilio.monti@arm.com 41:10b9abbe79a6 113 __data_end__ = .;
emilio.monti@arm.com 41:10b9abbe79a6 114
emilio.monti@arm.com 41:10b9abbe79a6 115 } > RAM
emilio.monti@arm.com 41:10b9abbe79a6 116
emilio.monti@arm.com 41:10b9abbe79a6 117 .bss :
emilio.monti@arm.com 41:10b9abbe79a6 118 {
emilio.monti@arm.com 41:10b9abbe79a6 119 __bss_start__ = .;
emilio.monti@arm.com 41:10b9abbe79a6 120 *(.bss*)
emilio.monti@arm.com 41:10b9abbe79a6 121 *(COMMON)
emilio.monti@arm.com 41:10b9abbe79a6 122 __bss_end__ = .;
emilio.monti@arm.com 41:10b9abbe79a6 123 } > RAM
emilio.monti@arm.com 41:10b9abbe79a6 124
emilio.monti@arm.com 41:10b9abbe79a6 125 .heap :
emilio.monti@arm.com 41:10b9abbe79a6 126 {
emilio.monti@arm.com 41:10b9abbe79a6 127 __end__ = .;
emilio.monti@arm.com 41:10b9abbe79a6 128 end = __end__;
emilio.monti@arm.com 41:10b9abbe79a6 129 *(.heap*)
emilio.monti@arm.com 41:10b9abbe79a6 130 __HeapLimit = .;
emilio.monti@arm.com 41:10b9abbe79a6 131 } > RAM
emilio.monti@arm.com 41:10b9abbe79a6 132
emilio.monti@arm.com 41:10b9abbe79a6 133 /* .stack_dummy section doesn't contains any symbols. It is only
emilio.monti@arm.com 41:10b9abbe79a6 134 * used for linker to calculate size of stack sections, and assign
emilio.monti@arm.com 41:10b9abbe79a6 135 * values to stack symbols later */
emilio.monti@arm.com 41:10b9abbe79a6 136 .stack_dummy :
emilio.monti@arm.com 41:10b9abbe79a6 137 {
emilio.monti@arm.com 41:10b9abbe79a6 138 *(.stack)
emilio.monti@arm.com 41:10b9abbe79a6 139 } > RAM
emilio.monti@arm.com 41:10b9abbe79a6 140
emilio.monti@arm.com 41:10b9abbe79a6 141 /* Set stack top to end of RAM, and stack limit move down by
emilio.monti@arm.com 41:10b9abbe79a6 142 * size of stack_dummy section */
emilio.monti@arm.com 41:10b9abbe79a6 143 __StackTop = ORIGIN(RAM) + LENGTH(RAM);
emilio.monti@arm.com 41:10b9abbe79a6 144 __StackLimit = __StackTop - SIZEOF(.stack_dummy);
emilio.monti@arm.com 41:10b9abbe79a6 145 PROVIDE(__stack = __StackTop);
emilio.monti@arm.com 41:10b9abbe79a6 146
emilio.monti@arm.com 41:10b9abbe79a6 147 /* Check if data + heap + stack exceeds RAM limit */
emilio.monti@arm.com 41:10b9abbe79a6 148 ASSERT(__StackLimit >= __HeapLimit, "region RAM overflowed with stack")
emilio.monti@arm.com 41:10b9abbe79a6 149 }