f7230f6af5
This fixes the following build errors: qlatincodec.o:(.debug_line+0xcd7): dangerous relocation: overflow after relaxation qmetaobject.o:(.debug_frame+0xa89): dangerous relocation: overflow after relaxation Fixes: http://autobuild.buildroot.net/results/f51/f51c87ae3c883cc36b06c0741999b52e48e4c943/ http://autobuild.buildroot.net/results/bcb/bcbf25e4054911a7a192bdb5c92e0ebd50e9666c/ http://autobuild.buildroot.net/results/8a8/8a8a0f8cca293ce1f383421ba8b1223b4266e3bc/ http://autobuild.buildroot.net/results/a54/a54f3707781dc193292eda7d1723fce6487d6980/ Backported from: 1058c7532d0b012ac329219264ddad59049fb6e6 Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
134 lines
4.7 KiB
Diff
134 lines
4.7 KiB
Diff
From 6a17eba5358549d0d6d195bb22b34cdbc068def2 Mon Sep 17 00:00:00 2001
|
|
From: Volodymyr Arbatov <arbatov@cadence.com>
|
|
Date: Mon, 6 May 2013 09:43:21 -0800
|
|
Subject: [PATCH] Use signed data type for R_XTENSA_DIFF* relocation offsets.
|
|
|
|
R_XTENSA_DIFF relocation offsets are in fact signed. Treat them as such.
|
|
Add testcase that examines ld behaviour on R_XTENSA_DIFF relocation
|
|
changing sign during relaxation.
|
|
|
|
2014-05-02 Volodymyr Arbatov <arbatov@cadence.com>
|
|
David Weatherford <weath@cadence.com>
|
|
Max Filippov <jcmvbkbc@gmail.com>
|
|
|
|
bfd/
|
|
* elf32-xtensa.c (relax_section): treat R_XTENSA_DIFF* relocations as
|
|
signed.
|
|
|
|
gas/
|
|
* config/tc-xtensa.c (md_apply_fix): mark BFD_RELOC_XTENSA_DIFF*
|
|
fixups as signed.
|
|
---
|
|
Backported from: 1058c7532d0b012ac329219264ddad59049fb6e6
|
|
Changes to Changelog files and tests are dropped.
|
|
|
|
bfd/elf32-xtensa.c | 32 ++++++++++++-----------
|
|
gas/config/tc-xtensa.c | 3 +++
|
|
2 files changed, 20 insertions(+), 15 deletions(-)
|
|
|
|
diff --git a/bfd/elf32-xtensa.c b/bfd/elf32-xtensa.c
|
|
index edb04b4..8818d67 100644
|
|
--- a/bfd/elf32-xtensa.c
|
|
+++ b/bfd/elf32-xtensa.c
|
|
@@ -222,11 +222,11 @@ static reloc_howto_type elf_howto_table[] =
|
|
FALSE, 0, 0, FALSE),
|
|
|
|
/* Relocations for supporting difference of symbols. */
|
|
- HOWTO (R_XTENSA_DIFF8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
|
|
+ HOWTO (R_XTENSA_DIFF8, 0, 0, 8, FALSE, 0, complain_overflow_signed,
|
|
bfd_elf_xtensa_reloc, "R_XTENSA_DIFF8", FALSE, 0, 0xff, FALSE),
|
|
- HOWTO (R_XTENSA_DIFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
|
|
+ HOWTO (R_XTENSA_DIFF16, 0, 1, 16, FALSE, 0, complain_overflow_signed,
|
|
bfd_elf_xtensa_reloc, "R_XTENSA_DIFF16", FALSE, 0, 0xffff, FALSE),
|
|
- HOWTO (R_XTENSA_DIFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
|
|
+ HOWTO (R_XTENSA_DIFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
|
|
bfd_elf_xtensa_reloc, "R_XTENSA_DIFF32", FALSE, 0, 0xffffffff, FALSE),
|
|
|
|
/* General immediate operand relocations. */
|
|
@@ -9013,7 +9013,8 @@ relax_section (bfd *abfd, asection *sec, struct bfd_link_info *link_info)
|
|
|| r_type == R_XTENSA_DIFF16
|
|
|| r_type == R_XTENSA_DIFF32)
|
|
{
|
|
- bfd_vma diff_value = 0, new_end_offset, diff_mask = 0;
|
|
+ bfd_signed_vma diff_value = 0;
|
|
+ bfd_vma new_end_offset, diff_mask = 0;
|
|
|
|
if (bfd_get_section_limit (abfd, sec) < old_source_offset)
|
|
{
|
|
@@ -9027,15 +9028,15 @@ relax_section (bfd *abfd, asection *sec, struct bfd_link_info *link_info)
|
|
{
|
|
case R_XTENSA_DIFF8:
|
|
diff_value =
|
|
- bfd_get_8 (abfd, &contents[old_source_offset]);
|
|
+ bfd_get_signed_8 (abfd, &contents[old_source_offset]);
|
|
break;
|
|
case R_XTENSA_DIFF16:
|
|
diff_value =
|
|
- bfd_get_16 (abfd, &contents[old_source_offset]);
|
|
+ bfd_get_signed_16 (abfd, &contents[old_source_offset]);
|
|
break;
|
|
case R_XTENSA_DIFF32:
|
|
diff_value =
|
|
- bfd_get_32 (abfd, &contents[old_source_offset]);
|
|
+ bfd_get_signed_32 (abfd, &contents[old_source_offset]);
|
|
break;
|
|
}
|
|
|
|
@@ -9047,24 +9048,25 @@ relax_section (bfd *abfd, asection *sec, struct bfd_link_info *link_info)
|
|
switch (r_type)
|
|
{
|
|
case R_XTENSA_DIFF8:
|
|
- diff_mask = 0xff;
|
|
- bfd_put_8 (abfd, diff_value,
|
|
+ diff_mask = 0x7f;
|
|
+ bfd_put_signed_8 (abfd, diff_value,
|
|
&contents[old_source_offset]);
|
|
break;
|
|
case R_XTENSA_DIFF16:
|
|
- diff_mask = 0xffff;
|
|
- bfd_put_16 (abfd, diff_value,
|
|
+ diff_mask = 0x7fff;
|
|
+ bfd_put_signed_16 (abfd, diff_value,
|
|
&contents[old_source_offset]);
|
|
break;
|
|
case R_XTENSA_DIFF32:
|
|
- diff_mask = 0xffffffff;
|
|
- bfd_put_32 (abfd, diff_value,
|
|
+ diff_mask = 0x7fffffff;
|
|
+ bfd_put_signed_32 (abfd, diff_value,
|
|
&contents[old_source_offset]);
|
|
break;
|
|
}
|
|
|
|
- /* Check for overflow. */
|
|
- if ((diff_value & ~diff_mask) != 0)
|
|
+ /* Check for overflow. Sign bits must be all zeroes or all ones */
|
|
+ if ((diff_value & ~diff_mask) != 0 &&
|
|
+ (diff_value & ~diff_mask) != (-1 & ~diff_mask))
|
|
{
|
|
(*link_info->callbacks->reloc_dangerous)
|
|
(link_info, _("overflow after relaxation"),
|
|
diff --git a/gas/config/tc-xtensa.c b/gas/config/tc-xtensa.c
|
|
index 58ace38..7547c0a0 100644
|
|
--- a/gas/config/tc-xtensa.c
|
|
+++ b/gas/config/tc-xtensa.c
|
|
@@ -5867,12 +5867,15 @@ md_apply_fix (fixS *fixP, valueT *valP, segT seg)
|
|
{
|
|
case BFD_RELOC_8:
|
|
fixP->fx_r_type = BFD_RELOC_XTENSA_DIFF8;
|
|
+ fixP->fx_signed = 1;
|
|
break;
|
|
case BFD_RELOC_16:
|
|
fixP->fx_r_type = BFD_RELOC_XTENSA_DIFF16;
|
|
+ fixP->fx_signed = 1;
|
|
break;
|
|
case BFD_RELOC_32:
|
|
fixP->fx_r_type = BFD_RELOC_XTENSA_DIFF32;
|
|
+ fixP->fx_signed = 1;
|
|
break;
|
|
default:
|
|
break;
|
|
--
|
|
1.8.1.4
|
|
|