kernel/src/script.ld
2024-05-13 17:31:37 -05:00

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# src/script.ld
OUTPUT_ARCH("riscv")
ENTRY(_start)
MEMORY {
ram (wxa) : ORIGIN = 0x80000000, LENGTH = 128M
}
PHDRS {
text PT_LOAD;
data PT_LOAD;
bss PT_LOAD;
}
SECTIONS {
. = ORIGIN(ram); # start at 0x8000_0000
.text : { # put code first
*(.text.init) # start with anything in the .text.init section
*(.text .text.*) # then put anything else in .text
} >ram AT>ram :text # put this section into the text segment
PROVIDE(_global_pointer = .); # this is magic, google "linker relaxation"
.rodata : { # next, read-only data
*(.rodata .rodata.*)
} >ram AT>ram :text # goes into the text segment as well (since instructions are generally read-only)
.data : { # and the data section
*(.sdata .sdata.*) *(.data .data.*)
} >ram AT>ram :data # this will go into the data segment
.bss :{ # finally, the BSS
PROVIDE(_bss_start = .); # define a variable for the start of this section
*(.sbss .sbss.*) *(.bss .bss.*)
PROVIDE(_bss_end = .); # ... and one at the end
} >ram AT>ram :bss # and this goes into the bss segment
. = ALIGN(16) # our stack needs to be 16-byte aligned, per the C calling convention
PROVIDE(_init_stack_top = . + 0x1000) # reserve 0x1000 bytes for the initialisation stack
}