2024-05-13 18:31:37 -04:00
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# src/script.ld
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OUTPUT_ARCH("riscv")
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2024-05-15 21:44:54 -04:00
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ENTRY(_enter)
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2024-05-13 18:31:37 -04:00
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MEMORY {
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ram (wxa) : ORIGIN = 0x80000000, LENGTH = 128M
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}
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PHDRS {
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text PT_LOAD;
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data PT_LOAD;
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bss PT_LOAD;
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}
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SECTIONS {
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. = ORIGIN(ram); # start at 0x8000_0000
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.text : { # put code first
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*(.text.init) # start with anything in the .text.init section
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*(.text .text.*) # then put anything else in .text
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} >ram AT>ram :text # put this section into the text segment
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PROVIDE(_global_pointer = .); # this is magic, google "linker relaxation"
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.rodata : { # next, read-only data
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*(.rodata .rodata.*)
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} >ram AT>ram :text # goes into the text segment as well (since instructions are generally read-only)
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.data : { # and the data section
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*(.sdata .sdata.*) *(.data .data.*)
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} >ram AT>ram :data # this will go into the data segment
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.bss :{ # finally, the BSS
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PROVIDE(_bss_start = .); # define a variable for the start of this section
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*(.sbss .sbss.*) *(.bss .bss.*)
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PROVIDE(_bss_end = .); # ... and one at the end
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} >ram AT>ram :bss # and this goes into the bss segment
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2024-05-13 23:07:46 -04:00
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. = ALIGN(16); # our stack needs to be 16-byte aligned, per the C calling convention
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PROVIDE(_init_stack_top = . + 0x1000); # reserve 0x1000 bytes for the initialisation stack
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2024-05-14 11:03:08 -04:00
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PROVIDE(_kernel_heap_bottom = _init_stack_top); # allocate heap to remaining physical memory
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PROVIDE(_kernel_heap_top = ORIGIN(ram) + LENGTH(ram)); # top of heap is end of ram
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PROVIDE(_kernel_heap_size = _kernel_heap_top - _kernel_heap_bottom); # capture size of heap
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2024-05-13 18:31:37 -04:00
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}
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