[PATCH 1/3] recordmcount: fix endianness handling bug for nop_mcount
From: Li Bin <hidden>
Date: 2015-10-30 08:33:17
Also in:
lkml
Subsystem:
the rest · Maintainer:
Linus Torvalds
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. Cc: <redacted> # 3.0+ Signed-off-by: Li Bin <redacted> --- scripts/recordmcount.h | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/scripts/recordmcount.h b/scripts/recordmcount.h
index 49b582a..dda9dba 100644
--- a/scripts/recordmcount.h
+++ b/scripts/recordmcount.h@@ -376,8 +376,9 @@ static void nop_mcount(Elf_Shdr const *const relhdr, mcountsym = get_mcountsym(sym0, relp, str0); if (mcountsym == Elf_r_sym(relp) && !is_fake_mcount(relp)) { - if (make_nop) - ret = make_nop((void *)ehdr, shdr->sh_offset + relp->r_offset); + if (make_nop) { + 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);
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1.7.12.4