mirror of
https://github.com/dougg3/mac-rom-simm-programmer.git
synced 2024-06-04 21:29:29 +00:00
4447ae2fb1
This will be used during firmware updates so that the main firmware can communicate to the bootloader that it should stay in the bootloader for a firmware update rather than run the main firmware again.
196 lines
4.0 KiB
Plaintext
196 lines
4.0 KiB
Plaintext
/* Linker script to configure memory regions. */
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MEMORY
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{
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FLASH (rx) : ORIGIN = 0x00100000, LENGTH = 4*1024
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RAM (rwx) : ORIGIN = 0x20000000, LENGTH = 16*1024
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}
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/* Library configurations */
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GROUP(libgcc.a libc.a libm.a libnosys.a)
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/* Linker script to place sections and symbol values. Should be used together
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* with other linker script that defines memory regions FLASH and RAM.
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* It references following symbols, which must be defined in code:
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* Reset_Handler : Entry of reset handler
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*
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* It defines following symbols, which code can use without definition:
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* __exidx_start
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* __exidx_end
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* __copy_table_start__
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* __copy_table_end__
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* __zero_table_start__
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* __zero_table_end__
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* __etext
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* __data_start__
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* __preinit_array_start
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* __preinit_array_end
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* __init_array_start
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* __init_array_end
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* __fini_array_start
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* __fini_array_end
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* __data_end__
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* __bss_start__
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* __bss_end__
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* __end__
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* end
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* __HeapLimit
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* __StackLimit
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* __StackTop
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* __stack
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* __Vectors_End
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* __Vectors_Size
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*/
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ENTRY(Reset_Handler)
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SECTIONS
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{
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.text :
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{
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KEEP(*(.vectors))
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__Vectors_End = .;
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__Vectors_Size = __Vectors_End - __Vectors;
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__end__ = .;
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*(.text*)
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KEEP(*(.init))
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KEEP(*(.fini))
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/* .ctors */
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*crtbegin.o(.ctors)
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*crtbegin?.o(.ctors)
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*(EXCLUDE_FILE(*crtend?.o *crtend.o) .ctors)
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*(SORT(.ctors.*))
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*(.ctors)
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/* .dtors */
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*crtbegin.o(.dtors)
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*crtbegin?.o(.dtors)
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*(EXCLUDE_FILE(*crtend?.o *crtend.o) .dtors)
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*(SORT(.dtors.*))
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*(.dtors)
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*(.rodata*)
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KEEP(*(.eh_frame*))
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} > FLASH
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.ARM.extab :
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{
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*(.ARM.extab* .gnu.linkonce.armextab.*)
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} > FLASH
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__exidx_start = .;
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.ARM.exidx :
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{
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*(.ARM.exidx* .gnu.linkonce.armexidx.*)
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} > FLASH
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__exidx_end = .;
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/* To copy multiple ROM to RAM sections,
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* uncomment .copy.table section and,
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* define __STARTUP_COPY_MULTIPLE in startup_ARMCMx.S */
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/*
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.copy.table :
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{
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. = ALIGN(4);
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__copy_table_start__ = .;
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LONG (__etext)
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LONG (__data_start__)
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LONG (__data_end__ - __data_start__)
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LONG (__etext2)
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LONG (__data2_start__)
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LONG (__data2_end__ - __data2_start__)
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__copy_table_end__ = .;
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} > FLASH
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*/
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/* To clear multiple BSS sections,
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* uncomment .zero.table section and,
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* define __STARTUP_CLEAR_BSS_MULTIPLE in startup_ARMCMx.S */
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/*
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.zero.table :
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{
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. = ALIGN(4);
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__zero_table_start__ = .;
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LONG (__bss_start__)
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LONG (__bss_end__ - __bss_start__)
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LONG (__bss2_start__)
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LONG (__bss2_end__ - __bss2_start__)
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__zero_table_end__ = .;
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} > FLASH
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*/
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__etext = .;
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.data : ALIGN(4)
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{
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__data_start__ = .;
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*(vtable)
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*(.data*)
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. = ALIGN(4);
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/* preinit data */
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PROVIDE_HIDDEN (__preinit_array_start = .);
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KEEP(*(.preinit_array))
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PROVIDE_HIDDEN (__preinit_array_end = .);
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. = ALIGN(4);
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/* init data */
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PROVIDE_HIDDEN (__init_array_start = .);
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KEEP(*(SORT(.init_array.*)))
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KEEP(*(.init_array))
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PROVIDE_HIDDEN (__init_array_end = .);
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. = ALIGN(4);
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/* finit data */
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PROVIDE_HIDDEN (__fini_array_start = .);
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KEEP(*(SORT(.fini_array.*)))
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KEEP(*(.fini_array))
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PROVIDE_HIDDEN (__fini_array_end = .);
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KEEP(*(.jcr*))
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. = ALIGN(4);
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/* All data end */
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__data_end__ = .;
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} > RAM AT > FLASH
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.bss :
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{
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. = ALIGN(4);
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__bss_start__ = .;
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*(.bss*)
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*(COMMON)
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. = ALIGN(4);
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__bss_end__ = .;
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} > RAM
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.heap (COPY):
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{
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__HeapBase = .;
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__end__ = .;
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end = __end__;
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KEEP(*(.heap*))
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__HeapLimit = .;
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} > RAM
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/* .stack_dummy section doesn't contains any symbols. It is only
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* used for linker to calculate size of stack sections, and assign
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* values to stack symbols later */
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.stack_dummy (COPY):
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{
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KEEP(*(.stack*))
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} > RAM
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/* Set stack top to end of RAM, and stack limit move down by
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* size of stack_dummy section. Reserve 4 bytes at end of RAM for magic number. */
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__StackTop = ORIGIN(RAM) + LENGTH(RAM) - 4;
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__StackLimit = __StackTop - SIZEOF(.stack_dummy);
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PROVIDE(__stack = __StackTop);
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/* Check if data + heap + stack exceeds RAM limit */
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ASSERT(__StackLimit >= __HeapLimit, "region RAM overflowed with stack")
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}
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