Alan Modra
7fcc471ca2
This reloc is meant for the 16-bit LWGP instruction, 0x6400/0xfc00 match/mask encoding in `micromips_opcodes'. It is correctly specified to operate on a half-word by the howtos in elf32-mips.c, elfn32-mips.c and elf64-mips.c, but is incorrectly subject to shuffle/unshuffle in code like _bfd_mips_elf32_gprel16_reloc. Current behaviour when applying the reloc to .byte 0x11,0x22,0x33,0x44 is to apply the reloc to byte 0x22 when big-endian, and to byte 0x33 when little-endian. Big-endian behaviour is unchanged after this patch and little-endian correctly applies the reloc to byte 0x11. The patch also corrects REL addend extraction from section contents, and overflow checking. gold had all of the bfd problems with this reloc and additionally did not apply the rightshift by two. bfd/ * elfxx-mips.c (micromips_reloc_shuffle_p): Return false for R_MICROMIPS_GPREL7_S2. (mips_elf_calculate_relocation): Correct sign extension and overflow calculation for R_MICROMIPS_GPREL7_S2. (_bfd_mips_elf_relocate_section): Update small-data overflow message. gold/ * mips.cc (Mips_relocate_functions::should_shuffle_micromips_reloc): Return false for R_MICROMIPS_GPREL7_S2. (Mips_relocate_functions::mips_reloc_unshuffle): Update comment. (Mips_relocate_functions::relgprel): Remove R_MICROMIPS_GPREL7_S2 handling. (Mips_relocate_functions::relgprel7): New function. (Target_mips::Relocate::relocate): Adjust to suit. ld/ * testsuite/ld-mips-elf/reloc-4.d: Adjust expected error. * testsuite/ld-mips-elf/reloc-5.d: Likewise.
README for GNU development tools This directory contains various GNU compilers, assemblers, linkers, debuggers, etc., plus their support routines, definitions, and documentation. If you are receiving this as part of a GDB release, see the file gdb/README. If with a binutils release, see binutils/README; if with a libg++ release, see libg++/README, etc. That'll give you info about this package -- supported targets, how to use it, how to report bugs, etc. It is now possible to automatically configure and build a variety of tools with one command. To build all of the tools contained herein, run the ``configure'' script here, e.g.: ./configure make To install them (by default in /usr/local/bin, /usr/local/lib, etc), then do: make install (If the configure script can't determine your type of computer, give it the name as an argument, for instance ``./configure sun4''. You can use the script ``config.sub'' to test whether a name is recognized; if it is, config.sub translates it to a triplet specifying CPU, vendor, and OS.) If you have more than one compiler on your system, it is often best to explicitly set CC in the environment before running configure, and to also set CC when running make. For example (assuming sh/bash/ksh): CC=gcc ./configure make A similar example using csh: setenv CC gcc ./configure make Much of the code and documentation enclosed is copyright by the Free Software Foundation, Inc. See the file COPYING or COPYING.LIB in the various directories, for a description of the GNU General Public License terms under which you can copy the files. REPORTING BUGS: Again, see gdb/README, binutils/README, etc., for info on where and how to report problems.