Relocation R_X86_64_32S out of range

[ghost]

I tried to link some code to large address using custom linker script but it says 'relocation R_X86_64_32S out of range'

linker script:

SECTIONS
{
  . = 0xffff800000000000;
  .text : { *(.text) }
  .data : { *(.data) }
  .bss : { *(.bss) }
}

command: rustc main.rs -C link-arg='--script=link.ld' -C code-model=large

Meta

rustc --version --verbose:

rustc 1.44.0-nightly (1edd389cc 2020-03-23)

Backtrace

<backtrace>

[ghost]

I figured it out! The core crate i'm linking with is built with different code-model and relocation-model. After re-build them with same code-model and relocation-model, everything works.

[polyproline]

I figured it out! The core crate i'm linking with is built with different code-model and relocation-model. After re-build them with same code-model and relocation-model, everything works.

Can you share about your resolution step?I have the same question with you.

[ghost]

You must use the same code-model and relocation-model when you building your core crate. The step to building core crate with custom target is quite hard and I still not figure it out, I just copy sysroot from some others project.

[polyproline]

You must use the same code-model and relocation-model when you building your core crate. The step to building core crate with custom target is quite hard and I still not figure it out, I just copy sysroot from some others project.

Thanke you for your response.
I used cargo-xbuild ,set env RUSTFLAGS to make crates in the same code-model and relocation-model then build fail with the same question
But when I used .cargo/config.toml ,set build-std and env RUSTFLAGS then it did well
Is cargo-xbuild question? what are you build command?

[ghost]

About the custom core crate, I can't remember anymore since it too long ago. As i said, I use cargo-xbuild to build the core crate for me and I just copy sysroot folder for private use after that.

# prepare some build tool and files
rustup component add rust-src
cargo install cargo-xbuild

cp /path/to/your/rust-toolchain .
cp /path/to/your/custom_target_file.json .
cp /path/to/your/placeholder_main.rs src/main.rs

# build the place holder project to get sysroot
cargo xbuild --target custom_target_file
cp -r target/sysroot/  /where/do/you/want/to/save/it

After that, use it as follow:

rustc main.rs -o main.elf -g --edition 2018 --target custom_target_file --sysroot /where/do/you/want/to/save/it -C link-args='--script=link.ld'

[polyproline]

About the custom core crate, I can't remember anymore since it too long ago. As i said, I use cargo-xbuild to build the core crate for me and I just copy sysroot folder for private use after that.

# prepare some build tool and files
rustup component add rust-src
cargo install cargo-xbuild

cp /path/to/your/rust-toolchain .
cp /path/to/your/custom_target_file.json .
cp /path/to/your/placeholder_main.rs src/main.rs

# build the place holder project to get sysroot
cargo xbuild --target custom_target_file
cp -r target/sysroot/  /where/do/you/want/to/save/it

After that, use it as follow:

rustc main.rs -o main.elf -g --edition 2018 --target custom_target_file --sysroot /where/do/you/want/to/save/it -C link-args='--script=link.ld'

Thank you

[ghost]

@polyproline, as some note, you should back up your sysroot folder if it works because this is just a work around and cargo-xbuild project can change their way of doing thing anytime and it may break everything. This happened to me once until I found out what they had changed and find my way to work around that.