23 lines
No EOL
1.1 KiB
Text
23 lines
No EOL
1.1 KiB
Text
RISC-V (rv32i) emulator in C
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This is just for me to understand how all this works, and to learn something new.
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So don't use it.
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Example programs:
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- return.bin: returns -1094647826 (puts it to register 10)
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- return2.bin: returns a different value with more steps. if it returns DADD, something's wrong
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Emulator exit codes:
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- <0 = OK
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- 0 = never happens
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- 1 - invalid opcode
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- 2 - illegal instruction argument (like funct3)
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To compile stuff:
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0. Get the toolchain obviously
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1. riscv32-unknown-elf-gcc -c -Oz program.c
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2. riscv32-unknown-elf-objcopy -O binary program.o program.bin
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3. program.bin is the binary file with the program, pass it as an argument
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rv32i, ilp32 compatible toolchain for 64bit Linux: https://lfs.m724.eu/toolchain.tar.zst adaa74f263dcba430da588b1109bc3b90bd90a84c67b06213bd03a7bbacd1a2a
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Or just the stuff necessary to make a binary file: https://lfs.m724.eu/toolchainlite.tar.zst 55e79dff7ba4093dedb8151461508fc157525ad89615d49d737845af03d1643f
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Those were compiled with `./configure --prefix=$(pwd)/../toolchain --with-arch=rv32i --with-abi=ilp32` and `make` |