[RFC v3] RISC-V: Fix SIGSEGV of --static-pie binaries on riscv64 [BZ #33911]

[Andreas Schwab]

On Mär 08 2026, daichengrong wrote:

> diff --git a/sysdeps/riscv/dl-machine.h b/sysdeps/riscv/dl-machine.h
> index 8c7312ad98..0c6b55c3f3 100644
> --- a/sysdeps/riscv/dl-machine.h
> +++ b/sysdeps/riscv/dl-machine.h
> @@ -157,10 +157,17 @@ __attribute__ ((always_inline))
>  elf_machine_rela_relative (ElfW(Addr) l_addr, const ElfW(Rela) *reloc,
>  			  void *const reloc_addr)
>  {
> -  /* R_RISCV_RELATIVE might located in debug info section which might not
> -     aligned to XLEN bytes.  Also support relocations on unaligned offsets.  */
> -  ElfW(Addr) value = l_addr + reloc->r_addend;
> -  memcpy (reloc_addr, &value, sizeof value);
> +#if __riscv_xlen == 64
> +  uint64_t value = l_addr + reloc->r_addend;
> +
> +  uint32_t lo = (uint32_t)value;
> +  uint32_t hi = (uint32_t)(value >> 32);
> +
> +  ((uint32_t*)reloc_addr)[0] = lo;
> +  ((uint32_t*)reloc_addr)[1] = hi;

Why do you need to split the store?

-- 
Andreas Schwab, SUSE Labs, schwab@suse.de
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