/* Target-dependent code for OpenBSD/powerpc. Copyright 2004 Free Software Foundation, Inc. This file is part of GDB. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include "defs.h" #include "arch-utils.h" #include "osabi.h" #include "regcache.h" #include "regset.h" #include "gdb_assert.h" #include "gdb_string.h" #include "ppc-tdep.h" #include "ppcobsd-tdep.h" #include "solib-svr4.h" /* Register offsets from <machine/reg.h>. */ struct ppc_reg_offsets ppcobsd_reg_offsets; /* Core file support. */ /* Supply register REGNUM in the general-purpose register set REGSET from the buffer specified by GREGS and LEN to register cache REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */ void ppcobsd_supply_gregset (const struct regset *regset, struct regcache *regcache, int regnum, const void *gregs, size_t len) { /* FIXME: jimb/2004-05-05: Some PPC variants don't have floating point registers. Traditionally, GDB's register set has still listed the floating point registers for such machines, so this code is harmless. However, the new E500 port actually omits the floating point registers entirely from the register set --- they don't even have register numbers assigned to them. It's not clear to me how best to update this code, so this assert will alert the first person to encounter the OpenBSD/E500 combination to the problem. */ gdb_assert (ppc_floating_point_unit_p (current_gdbarch)); ppc_supply_gregset (regset, regcache, regnum, gregs, len); ppc_supply_fpregset (regset, regcache, regnum, gregs, len); } /* Collect register REGNUM in the general-purpose register set REGSET. from register cache REGCACHE into the buffer specified by GREGS and LEN. If REGNUM is -1, do this for all registers in REGSET. */ void ppcobsd_collect_gregset (const struct regset *regset, const struct regcache *regcache, int regnum, void *gregs, size_t len) { /* FIXME: jimb/2004-05-05: Some PPC variants don't have floating point registers. Traditionally, GDB's register set has still listed the floating point registers for such machines, so this code is harmless. However, the new E500 port actually omits the floating point registers entirely from the register set --- they don't even have register numbers assigned to them. It's not clear to me how best to update this code, so this assert will alert the first person to encounter the OpenBSD/E500 combination to the problem. */ gdb_assert (ppc_floating_point_unit_p (current_gdbarch)); ppc_collect_gregset (regset, regcache, regnum, gregs, len); ppc_collect_fpregset (regset, regcache, regnum, gregs, len); } /* OpenBS/powerpc register set. */ struct regset ppcobsd_gregset = { &ppcobsd_reg_offsets, ppcobsd_supply_gregset }; /* Return the appropriate register set for the core section identified by SECT_NAME and SECT_SIZE. */ static const struct regset * ppcobsd_regset_from_core_section (struct gdbarch *gdbarch, const char *sect_name, size_t sect_size) { if (strcmp (sect_name, ".reg") == 0 && sect_size >= 412) return &ppcobsd_gregset; return NULL; } static void ppcobsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) { /* OpenBSD uses SVR4-style shared libraries. */ set_solib_svr4_fetch_link_map_offsets (gdbarch, svr4_ilp32_fetch_link_map_offsets); set_gdbarch_regset_from_core_section (gdbarch, ppcobsd_regset_from_core_section); } /* OpenBSD uses uses the traditional NetBSD core file format, even for ports that use ELF. */ #define GDB_OSABI_NETBSD_CORE GDB_OSABI_OPENBSD_ELF static enum gdb_osabi ppcobsd_core_osabi_sniffer (bfd *abfd) { if (strcmp (bfd_get_target (abfd), "netbsd-core") == 0) return GDB_OSABI_NETBSD_CORE; return GDB_OSABI_UNKNOWN; } /* Provide a prototype to silence -Wmissing-prototypes. */ void _initialize_ppcobsd_tdep (void); void _initialize_ppcobsd_tdep (void) { /* BFD doesn't set a flavour for NetBSD style a.out core files. */ gdbarch_register_osabi_sniffer (bfd_arch_powerpc, bfd_target_unknown_flavour, ppcobsd_core_osabi_sniffer); gdbarch_register_osabi (bfd_arch_powerpc, 0, GDB_OSABI_OPENBSD_ELF, ppcobsd_init_abi); /* Avoid initializing the register offsets again if they were already initailized by ppcobsd-nat.c. */ if (ppcobsd_reg_offsets.pc_offset == 0) { /* General-purpose registers. */ ppcobsd_reg_offsets.r0_offset = 0; ppcobsd_reg_offsets.pc_offset = 384; ppcobsd_reg_offsets.ps_offset = 388; ppcobsd_reg_offsets.cr_offset = 392; ppcobsd_reg_offsets.lr_offset = 396; ppcobsd_reg_offsets.ctr_offset = 400; ppcobsd_reg_offsets.xer_offset = 404; ppcobsd_reg_offsets.mq_offset = 408; /* Floating-point registers. */ ppcobsd_reg_offsets.f0_offset = 128; ppcobsd_reg_offsets.fpscr_offset = -1; /* AltiVec registers. */ ppcobsd_reg_offsets.vr0_offset = 0; ppcobsd_reg_offsets.vscr_offset = 512; ppcobsd_reg_offsets.vrsave_offset = 520; } }