/* Native-dependent code for NetBSD/powerpc. Copyright (C) 2002, 2004, 2005, 2006 Free Software Foundation, Inc. Contributed by Wasabi Systems, 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ #include <sys/types.h> #include <sys/ptrace.h> #include <machine/reg.h> #include <machine/frame.h> #include <machine/pcb.h> #include "defs.h" #include "gdbcore.h" #include "inferior.h" #include "regcache.h" #include "gdb_assert.h" #include "ppc-tdep.h" #include "ppcnbsd-tdep.h" #include "bsd-kvm.h" #include "inf-ptrace.h" /* Returns true if PT_GETREGS fetches this register. */ static int getregs_supplies (int regnum) { struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); return ((regnum >= tdep->ppc_gp0_regnum && regnum < tdep->ppc_gp0_regnum + ppc_num_gprs) || regnum == tdep->ppc_lr_regnum || regnum == tdep->ppc_cr_regnum || regnum == tdep->ppc_xer_regnum || regnum == tdep->ppc_ctr_regnum || regnum == PC_REGNUM); } /* Like above, but for PT_GETFPREGS. */ static int getfpregs_supplies (int regnum) { struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); /* 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 NetBSD/E500 combination to the problem. */ gdb_assert (ppc_floating_point_unit_p (current_gdbarch)); return ((regnum >= tdep->ppc_fp0_regnum && regnum < tdep->ppc_fp0_regnum + ppc_num_fprs) || regnum == tdep->ppc_fpscr_regnum); } static void ppcnbsd_fetch_inferior_registers (int regnum) { if (regnum == -1 || getregs_supplies (regnum)) { struct reg regs; if (ptrace (PT_GETREGS, PIDGET (inferior_ptid), (PTRACE_TYPE_ARG3) ®s, 0) == -1) perror_with_name (_("Couldn't get registers")); ppc_supply_gregset (&ppcnbsd_gregset, current_regcache, regnum, ®s, sizeof regs); } if (regnum == -1 || getfpregs_supplies (regnum)) { struct fpreg fpregs; if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid), (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) perror_with_name (_("Couldn't get FP registers")); ppc_supply_fpregset (&ppcnbsd_fpregset, current_regcache, regnum, &fpregs, sizeof fpregs); } } static void ppcnbsd_store_inferior_registers (int regnum) { if (regnum == -1 || getregs_supplies (regnum)) { struct reg regs; if (ptrace (PT_GETREGS, PIDGET (inferior_ptid), (PTRACE_TYPE_ARG3) ®s, 0) == -1) perror_with_name (_("Couldn't get registers")); ppc_collect_gregset (&ppcnbsd_gregset, current_regcache, regnum, ®s, sizeof regs); if (ptrace (PT_SETREGS, PIDGET (inferior_ptid), (PTRACE_TYPE_ARG3) ®s, 0) == -1) perror_with_name (_("Couldn't write registers")); } if (regnum == -1 || getfpregs_supplies (regnum)) { struct fpreg fpregs; if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid), (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) perror_with_name (_("Couldn't get FP registers")); ppc_collect_fpregset (&ppcnbsd_fpregset, current_regcache, regnum, &fpregs, sizeof fpregs); if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid), (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) perror_with_name (_("Couldn't set FP registers")); } } static int ppcnbsd_supply_pcb (struct regcache *regcache, struct pcb *pcb) { struct switchframe sf; struct callframe cf; struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); int i; /* The stack pointer shouldn't be zero. */ if (pcb->pcb_sp == 0) return 0; read_memory (pcb->pcb_sp, (gdb_byte *)&sf, sizeof sf); regcache_raw_supply (regcache, tdep->ppc_cr_regnum, &sf.cr); regcache_raw_supply (regcache, tdep->ppc_gp0_regnum + 2, &sf.fixreg2); for (i = 0 ; i < 19 ; i++) regcache_raw_supply (regcache, tdep->ppc_gp0_regnum + 13 + i, &sf.fixreg[i]); read_memory(sf.sp, (gdb_byte *)&cf, sizeof(cf)); regcache_raw_supply (regcache, tdep->ppc_gp0_regnum + 30, &cf.r30); regcache_raw_supply (regcache, tdep->ppc_gp0_regnum + 31, &cf.r31); regcache_raw_supply (regcache, tdep->ppc_gp0_regnum + 1, &cf.sp); read_memory(cf.sp, (gdb_byte *)&cf, sizeof(cf)); regcache_raw_supply (regcache, tdep->ppc_lr_regnum, &cf.lr); regcache_raw_supply (regcache, PC_REGNUM, &cf.lr); return 1; } /* Provide a prototype to silence -Wmissing-prototypes. */ void _initialize_ppcnbsd_nat (void); void _initialize_ppcnbsd_nat (void) { struct target_ops *t; /* Support debugging kernel virtual memory images. */ bsd_kvm_add_target (ppcnbsd_supply_pcb); /* Add in local overrides. */ t = inf_ptrace_target (); t->to_fetch_registers = ppcnbsd_fetch_inferior_registers; t->to_store_registers = ppcnbsd_store_inferior_registers; add_target (t); }