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Linker help https://forum.osdev.org/viewtopic.php?f=13&t=36529 |
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Author: | scdown [ Sun Feb 23, 2020 1:37 pm ] |
Post subject: | Linker help |
Hello, I'm working on a custom single-board computer based around the Motorola 68000. While I wait for the PCB to come in the mail, I've written some basic debugging scripts in M68k Assembler. I'd like to get my environment set up for writing C code now. The system has 256K of ROM starting at 0x0, and 256K of RAM starting at 0x120000. What I need to produce is an executable that fits in ROM, and starts out with a few kB of assembler code followed by a bunch of C code. Here is what my linker script looks like right now: Code: STARTUP(start.o) INPUT(main.o) OUTPUT(os.bin) OUTPUT_FORMAT("binary") ENTRY(_start) MEMORY { ROM(rx): ORIGIN = 0, LENGTH = 256k RAM(rwx): ORIGIN = 0x120000, LENGTH = 256k } SECTIONS { .text : { *(.text) *(.rodata*) } > ROM .data : { *(.data*) } > RAM AT > ROM .bss : { *(.bss*) } > RAM } Anything bad/wrong I'm doing there? The output binary looks like what I'd expect, but I want to make sure I'm doing everything correctly so I don't run into issues down the line. I can't test the binary until I get the PCB anyway. |
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