diff options
Diffstat (limited to 'patches/binutils/2.23.2/902-xtensa-gas-ld-diff-relocation-signed.patch')
| -rw-r--r-- | patches/binutils/2.23.2/902-xtensa-gas-ld-diff-relocation-signed.patch | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/patches/binutils/2.23.2/902-xtensa-gas-ld-diff-relocation-signed.patch b/patches/binutils/2.23.2/902-xtensa-gas-ld-diff-relocation-signed.patch new file mode 100644 index 0000000..ba24f4e --- /dev/null +++ b/patches/binutils/2.23.2/902-xtensa-gas-ld-diff-relocation-signed.patch @@ -0,0 +1,133 @@ +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 + |