scripts/sorttable: Fix endianness handling in build-time mcount sort

Kernel cross-compilation with BUILDTIME_MCOUNT_SORT produces zeroed
mcount values if the build-host endianness does not match the ELF
file endianness.

The mcount values array is converted from ELF file
endianness to build-host endianness during initialization in
fill_relocs()/fill_addrs(). Avoid extra conversion of these values during
weak-function zeroing; otherwise, they do not match nm-parsed addresses
and all mcount values are zeroed out.

Cc: Masami Hiramatsu <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: Nathan Chancellor <[email protected]>
Cc: Heiko Carstens <[email protected]>
Cc: Alexander Gordeev <[email protected]>
Link: https://lore.kernel.org/patch.git-dca31444b0f1.your-ad-here.call-01743554658-ext-8692@work.hours
Fixes: ef378c3 ("scripts/sorttable: Zero out weak functions in mcount_loc table")
Reported-by: Ilya Leoshkevich <[email protected]>
Reported-by: Ihor Solodrai <[email protected]>
Closes: https://lore.kernel.org/all/[email protected]/
Signed-off-by: Vasily Gorbik <[email protected]>
Signed-off-by: Steven Rostedt (Google) <[email protected]>

Author: Vasily Gorbik

scripts/sorttable.c

@@ -857,7 +857,7 @@ static void *sort_mcount_loc(void *arg)
 		for (void *ptr = vals; ptr < vals + size; ptr += long_size) {
 			uint64_t key;
 
-			key = long_size == 4 ? r((uint32_t *)ptr) : r8((uint64_t *)ptr);
+			key = long_size == 4 ? *(uint32_t *)ptr : *(uint64_t *)ptr;
 			if (!find_func(key)) {
 				if (long_size == 4)
 					*(uint32_t *)ptr = 0;