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ppc_fp0_regnum and ppc_fpscr_regnum: if they are -1, then this processor variant lacks those registers. (ppc_floating_point_unit_p): Change description to make it clear that this returns info about the ISA, not the ABI. * rs6000-tdep.c (ppc_floating_point_unit_p): Decide whether to return true or false by checking tdep->ppc_fp0_regnum and tdep->ppc_fpscr_regnum. The original code replicated the BFD arch/mach switching done in rs6000_gdbarch_init; it's better to keep that logic there, and just check the results here. (rs6000_gdbarch_init): On the E500, set tdep->ppc_fp0_regnum and tdep->ppc_fpscr_regnum to -1 to indicate that we have no floating-point registers. (ppc_supply_fpregset, ppc_collect_fpregset) (rs6000_push_dummy_call, rs6000_extract_return_value) (rs6000_store_return_value): Assert that we have floating-point registers. (rs6000_dwarf2_stab_reg_to_regnum): Add FIXME. (rs6000_frame_cache): Don't note the locations at which floating-point registers were saved if we have no fprs. * aix-thread.c (supply_fprs, fill_fprs): Assert that we have FP registers. (fetch_regs_user_thread, fetch_regs_kernel_thread) (store_regs_user_thread, store_regs_kernel_thread): Only call supply_fprs / fill_fprs if we actually have floating-point registers. (special_register_p): Check ppc_fpscr_regnum before matching against it. (supply_sprs64, supply_sprs32, fill_sprs64, fill_sprs32): Don't supply / collect fpscr if we don't have it. * ppc-bdm.c: #include "gdb_assert.h". (bdm_ppc_fetch_registers, bdm_ppc_store_registers): Assert that we have floating-point registers, since I can't test this code on FP-free systems to adapt it. * ppc-linux-nat.c (ppc_register_u_addr): Don't match against the fpscr and floating point register numbers if they don't exist. (fetch_register): Assert that we have floating-point registers before we reach the code that handles them. (store_register): Same. And use tdep instead of calling gdbarch_tdep again. (fill_fpregset): Don't try to collect FP registers and fpscr if we don't have them. (ppc_linux_sigtramp_cache): Don't record the saved locations of fprs and fpscr if we don't have them. (ppc_linux_supply_fpregset): Don't supply fp regs and fpscr if we don't have them. * ppcnbsd-nat.c: #include "gdb_assert.h". (getfpregs_supplies): Assert that we have floating-point registers. * ppcnbsd-tdep.c (ppcnbsd_supply_fpreg, ppcnbsd_fill_fpreg): Same. * ppcobsd-tdep.c: #include "gdb_assert.h". (ppcobsd_supply_gregset, ppcobsd_collect_gregset): Assert that we have floating-point registers. * rs6000-nat.c (regmap): Don't match against the fpscr and floating point register numbers if they don't exist. (fetch_inferior_registers, store_inferior_registers, fetch_core_registers): Only fetch / store / supply the floating-point registers and the fpscr if we have them. * Makefile.in (ppc-bdm.o, ppc-linux-nat.o, ppcnbsd-nat.o) (ppcobsd-tdep.o): Update dependencies.
135 lines
3.9 KiB
C
135 lines
3.9 KiB
C
/* Native-dependent code for PowerPC's running NetBSD, for GDB.
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Copyright 2002 Free Software Foundation, Inc.
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Contributed by Wasabi Systems, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <sys/types.h>
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#include <sys/ptrace.h>
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#include <machine/reg.h>
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#include "defs.h"
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#include "inferior.h"
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#include "gdb_assert.h"
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#include "ppc-tdep.h"
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#include "ppcnbsd-tdep.h"
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/* Returns true if PT_GETREGS fetches this register. */
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static int
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getregs_supplies (int regno)
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{
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struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
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return ((regno >= 0 && regno <= 31)
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|| regno == tdep->ppc_lr_regnum
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|| regno == tdep->ppc_cr_regnum
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|| regno == tdep->ppc_xer_regnum
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|| regno == tdep->ppc_ctr_regnum
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|| regno == PC_REGNUM);
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}
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/* Like above, but for PT_GETFPREGS. */
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static int
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getfpregs_supplies (int regno)
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{
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struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
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/* FIXME: jimb/2004-05-05: Some PPC variants don't have floating
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point registers. Traditionally, GDB's register set has still
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listed the floating point registers for such machines, so this
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code is harmless. However, the new E500 port actually omits the
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floating point registers entirely from the register set --- they
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don't even have register numbers assigned to them.
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It's not clear to me how best to update this code, so this assert
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will alert the first person to encounter the NetBSD/E500
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combination to the problem. */
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gdb_assert (ppc_floating_point_unit_p (current_gdbarch));
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return ((regno >= tdep->ppc_fp0_regnum
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&& regno < tdep->ppc_fp0_regnum + ppc_num_fprs)
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|| regno == tdep->ppc_fpscr_regnum);
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}
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void
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fetch_inferior_registers (int regno)
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{
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if (regno == -1 || getregs_supplies (regno))
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{
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struct reg regs;
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if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
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(PTRACE_ARG3_TYPE) ®s, 0) == -1)
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perror_with_name ("Couldn't get registers");
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ppcnbsd_supply_reg ((char *) ®s, regno);
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if (regno != -1)
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return;
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}
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if (regno == -1 || getfpregs_supplies (regno))
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{
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struct fpreg fpregs;
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if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
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(PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
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perror_with_name ("Couldn't get FP registers");
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ppcnbsd_supply_fpreg ((char *) &fpregs, regno);
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if (regno != -1)
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return;
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}
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}
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void
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store_inferior_registers (int regno)
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{
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if (regno == -1 || getregs_supplies (regno))
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{
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struct reg regs;
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if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
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(PTRACE_ARG3_TYPE) ®s, 0) == -1)
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perror_with_name ("Couldn't get registers");
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ppcnbsd_fill_reg ((char *) ®s, regno);
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if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
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(PTRACE_ARG3_TYPE) ®s, 0) == -1)
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perror_with_name ("Couldn't write registers");
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if (regno != -1)
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return;
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}
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if (regno == -1 || getfpregs_supplies (regno))
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{
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struct fpreg fpregs;
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if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
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(PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
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perror_with_name ("Couldn't get FP registers");
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ppcnbsd_fill_fpreg ((char *) &fpregs, regno);
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if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),
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(PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
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perror_with_name ("Couldn't set FP registers");
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}
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}
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