Error while running Berkeley boot loader

[Srinija Ramichetty]

Hello Everyone,

I am trying to run linux kernel on rocketchip , i believe this is possible using the Berkeley boot loader so once i build the rocketchip i get an executable, which i can be used something like this ..

command:  ./emulatorDefaulrocketconfig bbl <path to my binary>

The reason to do this is my binaries have syscalls which cannot be used along with proxy kernel 

For this purpose, I am trying to configure the Berkeley bootloader 

 I generated the vmlinux kernel binary 

then I ran the following steps in riscv-pk directory 

mkdir build

cd build

 ./configure --prefix=$RISCV --host=riscv64-unknown-elf --with-payload=linux-4.6.2/vmlinux

make 

I encountered the following error :

riscv64-unknown-elf-gcc -MMD -MP -Wall -Werror -D__NO_INLINE__ -mcmodel=medany -O2 -std=gnu99 -Wno-unused -Wno-attributes -fno-delete-null-pointer-checks  -DBBL_PAYLOAD=\"linux-4.6.2/vmlinux\" -I. -I./bbl -c ./bbl/configstring.c
riscv64-unknown-elf-gcc -MMD -MP -Wall -Werror -D__NO_INLINE__ -mcmodel=medany -O2 -std=gnu99 -Wno-unused -Wno-attributes -fno-delete-null-pointer-checks  -DBBL_PAYLOAD=\"linux-4.6.2/vmlinux\" -I. -I./bbl -c ./bbl/kernel_elf.c
riscv64-unknown-elf-gcc -MMD -MP -Wall -Werror -D__NO_INLINE__ -mcmodel=medany -O2 -std=gnu99 -Wno-unused -Wno-attributes -fno-delete-null-pointer-checks  -DBBL_PAYLOAD=\"linux-4.6.2/vmlinux\" -I. -I./bbl -c ./bbl/logo.c
riscv64-unknown-elf-gcc -MMD -MP -Wall -Werror -D__NO_INLINE__ -mcmodel=medany -O2 -std=gnu99 -Wno-unused -Wno-attributes -fno-delete-null-pointer-checks  -DBBL_PAYLOAD=\"linux-4.6.2/vmlinux\" -I. -I./bbl -c ./bbl/mtrap.c
./bbl/mtrap.c: Assembler messages:
./bbl/mtrap.c:130: Error: unrecognized opcode `fence.i', extension `zifencei' required
make: *** [Makefile:300: mtrap.o] Error 1

If I execute the above steps in other way I get the following error :

Steps:

mkdir build 

cd build 

 sudo ../configure --host=riscv64-unknown-linux-gnu --with payload=/home/srinija/linux/vmlinux --prefix=/opt/riscv/ 

sudo make -j 24

Error :

gcc: error: unrecognized argument in option ‘-mcmodel=medany’
gcc: note: valid arguments to ‘-mcmodel=’ are: 32 kernel large medium small
make: *** [Makefile:336: file.o] Error 1
make: *** Waiting for unfinished jobs....
make: *** [Makefile:336: syscall.o] Error 1
gcc: error: unrecognized argument in option ‘-mcmodel=medany’
gcc: note: valid arguments to ‘-mcmodel=’ are: 32 kernel large medium small
gcc: error: unrecognized argument in option ‘-mcmodel=medany’
gcc: note: valid arguments to ‘-mcmodel=’ are: 32 kernel large medium small
make: *** [Makefile:336: handlers.o] Error 1
gcc: error: unrecognized argument in option ‘-mcmodel=medany’
gcc: note: valid arguments to ‘-mcmodel=’ are: 32 kernel large medium small
gcc: error: unrecognized argument in option ‘-mcmodel=medany’
gcc: note: valid arguments to ‘-mcmodel=’ are: 32 kernel large medium small
make: *** [Makefile:336: frontend.o] Error 1
make: *** [Makefile:336: console.o] Error 1
make: *** [Makefile:336: usermem.o] Error 1
make: *** [Makefile:336: elf.o] Error 1
gcc: error: unrecognized argument in option ‘-mcmodel=medany’
gcc: note: valid arguments to ‘-mcmodel=’ are: 32 kernel large medium small
make: *** [Makefile:336: mmap.o] Error 1
make: *** [Makefile:336: entry.o] Error 1

Can anyone please tell me how to solve the above errors, I also configured riscv-tool-chain properly, I have both newlib and glibc toolchain flavors installed

Regards

Srinija

[Tommy Murphy]

> ./bbl/mtrap.c:130: Error: unrecognized opcode `fence.i', extension `zifencei' required 

Your toolchain was presumably configured with an arch that does not support the `zifencei` extension.

This - and `zicsr` - used to be included as part of the base integer (`I`) ISA but along the way they were split out as separate extensions.

You need to check what the default `arch/abi` of your toolchain - e.g. `riscv64-unknown-elf-gcc -dumspecs` and look for `*multilib-defaults:`.

You might be able to just specify, say, `-march=rv64gc_zifencei -mabi=lp64d` when compiling but you may get link errors if it looks for the corresponding standard libs/startup code and they do not exist.

There's more background on this here and in other `riscv-gnu-toolchain` Issues:

* https://github.com/riscv-collab/riscv-gnu-toolchain/issues/1315

> gcc: error: unrecognized argument in option ‘-mcmodel=medany’

Are you sure that the RISC-V GCC is being invoked here and not the native (e.g. x86-64) one?