On Tue, 30 Mar 2021, Thomas Bogendoerfer wrote: > I want a single go binary, which I can inspect about the FPXX thing and > see how easy it would be to just patch the binary and make it run without > this patch. I have experimented with this a bit and unfortunately a command like: $ objcopy --remove-section=.MIPS.abiflags go go-noabiflags will indeed remove the MIPS ABI Flags section, but will leave an empty ABIFLAGS segment behind: ABIFLAGS 0x000000 0x00400248 0x00000000 0x00000 0x00000 R 0x4 which the kernel will choke on in `arch_elf_pt_proc': if (phdr32->p_filesz < sizeof(abiflags)) return -EINVAL; or: if (phdr64->p_filesz < sizeof(abiflags)) return -EINVAL; which I think is another implementation bug; I think we should silently ignore an empty segment like say `readelf -A' does, that is: if (!phdr32->p_filesz) return 0; etc. Sadly there's no option for `objcopy' to explicitly handle segments anyhow including to remove empty ones. There's the `--update-section' section option for `objcopy' that should work, but it requires more effort as an image of a patched .MIPS.abiflags section is required (still doable). Maciej
