Re: [PATCH v2 2/5] LoongArch: Use la.pcrel instead of la.abs for exception handlers

[Xi Ruoyao]

On Tue, 2023-02-07 at 22:28 +0800, Xi Ruoyao wrote:
> +struct handler_reloc *eentry_reloc[128] = {
> +       [0] = NULL, /* merr handler */

Self review:

This is actually incorrect.  Currently the merr handler (except_vec_cex)
is coded as:

SYM_FUNC_START(except_vec_cex)
        b       cache_parity_error
SYM_FUNC_END(except_vec_cex)

Once this is copied into the per-cpu handler page, the offset (coded in
the b instruction) will be absolutely wrong.  But it's already incorrect
in the current mainline, and I'm not familiar with CSR.CRMD.DA=1
configuration so I'm not sure how to fix it.

-- 
Xi Ruoyao <xry111@xxxxxxxxxxx>
School of Aerospace Science and Technology, Xidian University