1*d6f2548eSPuranjay Mohan#!/bin/bash 2*d6f2548eSPuranjay Mohan# SPDX-License-Identifier: GPL-2.0 3*d6f2548eSPuranjay Mohan# 4*d6f2548eSPuranjay Mohan# Init code and data are freed after boot, so a klp relocation against them can 5*d6f2548eSPuranjay Mohan# never resolve. Such a patch must be rejected. 6*d6f2548eSPuranjay Mohan 7*d6f2548eSPuranjay Mohan. "$(dirname "$0")/../lib.sh" 8*d6f2548eSPuranjay Mohan 9*d6f2548eSPuranjay Mohansetup 10*d6f2548eSPuranjay Mohanbuild_pair init_reference.c 11*d6f2548eSPuranjay Mohan 12*d6f2548eSPuranjay Mohan# The rejection can only happen if the patched build really does reference the 13*d6f2548eSPuranjay Mohan# init symbol. The fixture makes init_only volatile so the read cannot be 14*d6f2548eSPuranjay Mohan# folded away, and this checks that it worked: without a relocation klp diff 15*d6f2548eSPuranjay Mohan# would succeed, and the failure below would read as a missing check rather 16*d6f2548eSPuranjay Mohan# than as a fixture which stopped posing the question. 17*d6f2548eSPuranjay Mohan# Either spelling will do. A file-local variable is reached through its 18*d6f2548eSPuranjay Mohan# section symbol -- .init.data -- and a global one by name; which of the two 19*d6f2548eSPuranjay Mohan# the compiler picks is its business, and the reference is what matters. 20*d6f2548eSPuranjay Mohanin_relocs "$patched_obj" | 21*d6f2548eSPuranjay Mohan awk '$5 == ".init.data" || $5 == "init_only"' | grep -q . || 22*d6f2548eSPuranjay Mohan fail "patched object has no reference into .init.data; the fixture tests nothing" 23*d6f2548eSPuranjay Mohan 24*d6f2548eSPuranjay Mohanrun_diff 255 25*d6f2548eSPuranjay Mohan 26*d6f2548eSPuranjay Mohandiff_log | grep -q "can't patch or reference init code/data" || 27*d6f2548eSPuranjay Mohan fail "expected rejection, got: $(diff_log | tail -1)" 28*d6f2548eSPuranjay Mohan 29*d6f2548eSPuranjay Mohanpass "reference to init data rejected" 30