[question] Kernel load segfault

[WojciechMula]

I compiled the whole build toolchain from scratch, likewise spike and pk. When trying to run the simplest "Hello, World" program on my Linux box, I'm getting the following error: "Kernel load segfault @ 0x0000000010000005".

Any advice on what to check/recompile/whatever would be highly appreciated.

[zacky1972]

I am also facing to this issue.

Distribution: Ubuntu 22.04

I built and installed riscv-gnu-toolchain as follows:

sudo apt update
git clone https://github.com/riscv-collab/riscv-gnu-toolchain.git
cd riscv-gnu-toolchain
mkdir build
./configure --prefix=/usr/local/riscv
make -j$(nproc)
make install

I built and installed spike as follows:

sudo apt update
sudo apt install device-tree-compiler
git clone https://github.com/riscv-software-src/riscv-isa-sim.git
cd riscv-isa-sim
mkdir build
cd build
../configure --prefix=/usr/local/riscv
make -j$(nproc)
sudo make install

I built and installed pk as follows:

git clone https://github.com/riscv-software-src/riscv-pk.git
cd riscv-pk
mkdir build
cd build
../configure --prefix=/usr/local/riscv --host=riscv64-unknown-elf
make -j$(nproc)
sudo make install

I built an sample program:

int main()
{
    return 0;
}

Then, compiled and executed it as follows:

/usr/local/riscv/bin/riscv64-unknown-elf-gcc -static hello.c 
/usr/local/riscv/bin/spike /usr/local/riscv/riscv64-unknown-elf/bin/pk a.out

Then, got the following error:

bbl loader
z  0000000000000000 ra ffffffc000004214 sp ffffffc00041ed30 gp 0000000000000000
tp 0000000000000000 t0 0000000000000025 t1 ffffffc00041ed6f t2 0000000000000000
s0 ffffffc00041ed31 s1 ffffffc00001a0c8 a0 000000000000002e a1 0000000000000100
a2 ffffffc00000d2b4 a3 0000000010000000 a4 0000000010000005 a5 0000000000000000
a6 000000000000003f a7 000000000000003f s2 ffffffc00001a0d8 s3 ffffffc00001a0e0
s4 ffffffc00000f018 s5 0000000000000001 s6 ffffffc000010478 s7 ffffffc00001a040
s8 ffffffc000010480 s9 ffffffc000010488 sA 0000000000000001 sB 0000000000000000
t3 fffffffffffffffc t4 ffffffc00000d060 t5 0000000000000009 t6 0000000000000015
pc ffffffc00000531c va/inst 0000000010000005 sr 8000000200006100
Kernel load segfault @ 0x0000000010000005

I also tested pk that is built on macOS on January, then exited normally:

/usr/local/riscv/bin/spike ~/pk a.out
bbl loader

Thus, I think spike is correct but pk is wrong.

[makutak]

I faced the same problem.
I checked out the commit hash(8ce2dc4) and did configure, make, make install and it worked.

My Distribution: Ubuntu 22.04

[zacky1972]

Thank you, @makutak

I can build by checking out the hash 8ce2dc4, with configure option --with-arch=rv64gc_zifencei according to the issue #260, and it worked.

[WojciechMula]

@makutak so, the commit 54de960 broke Ubuntu/Debian. Seems is_32bit is incorrectly set if we pass --host --- am I right?

[WojciechMula]

@mga-sc could you please take a look?

[mga-sc]

Yes, it seems like my commit https://github.com/riscv-software-src/riscv-pk/pull/296/files broke this. But my inner testsuite wasn't broken, I'm sorry.

So, in order to solve this issue, first we should roll back changes.

But the second problem is connected with csr and fence. We must include im_zicsr_zifencei in march. Can't we get info about rv32/rv64 from host if -march wasn't set?

[aswaterman]

I reverted #296 until this is resolved.