recordmcount: Fix endianness handling bug for nop_mcount

In nop_mcount, shdr->sh_offset and welp->r_offset should handle endianness properly, otherwise it will trigger Segmentation fault if the recordmcount main and file.o have different endianness. Link: http://lkml.kernel.org/r/[email protected] Cc: <[email protected]> # 3.0+ Signed-off-by: Li Bin <[email protected]> Signed-off-by: Steven Rostedt <[email protected]>
maraz · Nov 3, 2015 · c84da8b · c84da8b
1 parent a15920b
commit c84da8b
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/scripts/recordmcount.h b/scripts/recordmcount.h
@@ -377,7 +377,7 @@ static void nop_mcount(Elf_Shdr const *const relhdr,
 
 		if (mcountsym == Elf_r_sym(relp) && !is_fake_mcount(relp)) {
 			if (make_nop)
-				ret = make_nop((void *)ehdr, shdr->sh_offset + relp->r_offset);
+				ret = make_nop((void *)ehdr, _w(shdr->sh_offset) + _w(relp->r_offset));
 			if (warn_on_notrace_sect && !once) {
 				printf("Section %s has mcount callers being ignored\n",
 				       txtname);