53 lines
1.7 KiB
Plaintext
53 lines
1.7 KiB
Plaintext
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/* The bootloader will look at this image and start execution at the symbol
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designated as the entry point. */
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ENTRY(_start)
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/* Tell where the various sections of the object files will be put in the final
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kernel image. */
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SECTIONS
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{
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/* It used to be universally recommended to use 1M as a start offset,
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as it was effectively guaranteed to be available under BIOS systems.
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However, UEFI has made things more complicated, and experimental data
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strongly suggests that 2M is a safer place to load. In 2016, a new
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feature was introduced to the multiboot2 spec to inform bootloaders
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that a kernel can be loaded anywhere within a range of addresses and
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will be able to relocate itself to run from such a loader-selected
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address, in order to give the loader freedom in selecting a span of
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memory which is verified to be available by the firmware, in order to
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work around this issue. This does not use that feature, so 2M was
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chosen as a safer option than the traditional 1M. */
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. = 2M;
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/* First put the multiboot header, as it is required to be put very early
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in the image or the bootloader won't recognize the file format.
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Next we'll put the .text section. */
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.text BLOCK(4K) : ALIGN(4K)
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{
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*(.multiboot)
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*(.text)
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}
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/* Read-only data. */
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.rodata BLOCK(4K) : ALIGN(4K)
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{
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*(.rodata)
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}
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/* Read-write data (initialized) */
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.data BLOCK(4K) : ALIGN(4K)
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{
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*(.data)
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}
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/* Read-write data (uninitialized) and stack */
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.bss BLOCK(4K) : ALIGN(4K)
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{
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*(COMMON)
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*(.bss)
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}
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/* The compiler may produce other sections, by default it will put them in
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a segment with the same name. Simply add stuff here as needed. */
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}
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