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The 4-byte VSCR register is found inside a 16-byte field in the regset returned by ptrace and in core files. The position of VSCR depends on the endianess of the target, which was previously assumed to be big-endian for the purpose of getting VSCR. This patch removes this assumption to fix access to VSCR in little-endian mode. gdb/ChangeLog: 2018-05-22 Pedro Franco de Carvalho <pedromfc@linux.vnet.ibm.com> * ppc-tdep.h (struct ppc_reg_offsets): Remove vector register offset fields. * ppc-fbsd-tdep.c (ppc32_fbsd_reg_offsets): Remove initializers for vector register offset fields. (ppc64_fbsd_reg_offsets): Likewise. * ppc-nbsd-tdep.c (_initialize_ppcnbsd_tdep): Remove assignment to vector register offset fields. * ppc-obsd-tdep.c (_initialize_ppcnbsd_tdep): Remove assignment to vector register offset fields. * ppc-obsd-nat.c (_initialize_ppcobsd_nat): Remove assignment to vector register offset fields. * rs6000-aix-tdep.c (rs6000_aix32_reg_offsets): Remove initializers for vector register offset fields. (rs6000_aix64_reg_offsets): Likewise. * rs6000-tdep.c (ppc_vrreg_offset): Remove. (ppc_supply_vrregset): Remove. (ppc_collect_vrregset): Remove. * ppc-linux-tdep.c (ppc_linux_collect_vrregset): New function. (ppc_linux_vrregset) : New function. (ppc32_le_linux_vrregmap, ppc32_be_linux_vrregmap) (ppc32_le_linux_vrregset, ppc32_be_linux_vrregset): New globals. (ppc32_linux_vrregset): Remove. (ppc_linux_iterate_over_regset_sections): Call ppc_linux_vrregset and use result instead of ppc32_linux_vrregset. (ppc32_linux_reg_offsets): Remove initializers for vector register offset fields. (ppc64_linux_reg_offsets): Likewise. * ppc-linux-tdep.h (ppc_linux_vrregset): New declaration. * ppc-linux-nat.c: Include regset.h. (gdb_vrregset_t): Adjust comment to account for little-endian mode. (supply_vrregset, fill_vrregset): Remove. (fetch_altivec_register, store_altivec_register): Remove. (fetch_altivec_registers): Add regno parameter. Get regset using ppc_linux_vrregset. Use regset to supply registers. (store_altivec_registers): Add regno parameter. Get regset using ppc_linux_vrregset. Use regset to collect registers. (fetch_register): Call fetch_altivec_registers instead of fetch_altivec_register. (store_register): Call store_altivec_registers instead of store_altivec_register. (fetch_ppc_registers): Call fetch_altivec_registers with -1 for the new regno parameter. (store_ppc_registers): Call store_altivec_registers with -1 for the new regno parameter. gdb/gdbserver/ChangeLog: 2018-05-22 Pedro Franco de Carvalho <pedromfc@linux.vnet.ibm.com> * linux-ppc-low.c (ppc_fill_vrregset): Add vscr_offset variable. Set vscr_offset to 0 in little-endian mode and 12 in big-endian mode. Call collect_register_by_name with vscr using vscr_offset. Zero-pad vscr and vrsave fields in collector buffer. (ppc_store_vrregset): Add and set vscr_offset variable as in ppc_fill_vrregset. Call supply_register_by_name with vscr using vscr_offset.
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.