Linker can't find kernel entry symbol.

[judearich]

Hello, when compiling the kernel, the linker (riscv64-elf-ld) issues the following warning:

riscv64-elf-ld: warning: cannot find entry symbol _entry; defaulting to 0000000080000000

The linker can't find the _entry symbol, so it defaults to an address that just so happens, one can see from reading the comments in the file kernel/entry.S, to be the location of the _entry symbol. Everything works, but it's a bit of a kludge.

After troubleshooting, I found that _entry isn't exported as a global symbol. putting a .global _entry directive in kernel/entry.S fixes the problem and removes the linker warning.

[ghost]

I have the same error. The kernel isn't booting. I'm using rvemu: https://github.com/d0iasm/rvemu