228 lines
6.3 KiB
C
228 lines
6.3 KiB
C
/* Target-dependent code for PowerPC systems running NetBSD.
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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 "defs.h"
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#include "gdbcore.h"
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#include "regcache.h"
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#include "target.h"
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#include "breakpoint.h"
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#include "value.h"
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#include "ppc-tdep.h"
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#include "ppcnbsd-tdep.h"
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#include "nbsd-tdep.h"
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#include "solib-svr4.h"
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#define REG_FIXREG_OFFSET(x) ((x) * 4)
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#define REG_LR_OFFSET (32 * 4)
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#define REG_CR_OFFSET (33 * 4)
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#define REG_XER_OFFSET (34 * 4)
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#define REG_CTR_OFFSET (35 * 4)
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#define REG_PC_OFFSET (36 * 4)
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#define SIZEOF_STRUCT_REG (37 * 4)
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#define FPREG_FPR_OFFSET(x) ((x) * 8)
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#define FPREG_FPSCR_OFFSET (32 * 8)
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#define SIZEOF_STRUCT_FPREG (33 * 8)
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void
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ppcnbsd_supply_reg (char *regs, int regno)
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{
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struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
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int i;
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for (i = 0; i <= 31; i++)
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{
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if (regno == i || regno == -1)
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supply_register (i, regs + REG_FIXREG_OFFSET (i));
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}
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if (regno == tdep->ppc_lr_regnum || regno == -1)
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supply_register (tdep->ppc_lr_regnum, regs + REG_LR_OFFSET);
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if (regno == tdep->ppc_cr_regnum || regno == -1)
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supply_register (tdep->ppc_cr_regnum, regs + REG_CR_OFFSET);
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if (regno == tdep->ppc_xer_regnum || regno == -1)
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supply_register (tdep->ppc_xer_regnum, regs + REG_XER_OFFSET);
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if (regno == tdep->ppc_ctr_regnum || regno == -1)
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supply_register (tdep->ppc_ctr_regnum, regs + REG_CTR_OFFSET);
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if (regno == PC_REGNUM || regno == -1)
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supply_register (PC_REGNUM, regs + REG_PC_OFFSET);
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}
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void
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ppcnbsd_fill_reg (char *regs, int regno)
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{
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struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
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int i;
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for (i = 0; i <= 31; i++)
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{
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if (regno == i || regno == -1)
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regcache_collect (i, regs + REG_FIXREG_OFFSET (i));
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}
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if (regno == tdep->ppc_lr_regnum || regno == -1)
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regcache_collect (tdep->ppc_lr_regnum, regs + REG_LR_OFFSET);
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if (regno == tdep->ppc_cr_regnum || regno == -1)
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regcache_collect (tdep->ppc_cr_regnum, regs + REG_CR_OFFSET);
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if (regno == tdep->ppc_xer_regnum || regno == -1)
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regcache_collect (tdep->ppc_xer_regnum, regs + REG_XER_OFFSET);
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if (regno == tdep->ppc_ctr_regnum || regno == -1)
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regcache_collect (tdep->ppc_ctr_regnum, regs + REG_CTR_OFFSET);
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if (regno == PC_REGNUM || regno == -1)
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regcache_collect (PC_REGNUM, regs + REG_PC_OFFSET);
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}
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void
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ppcnbsd_supply_fpreg (char *fpregs, int regno)
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{
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struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
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int i;
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for (i = FP0_REGNUM; i <= FP0_REGNUM + 31; i++)
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{
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if (regno == i || regno == -1)
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supply_register (i, fpregs + FPREG_FPR_OFFSET (i - FP0_REGNUM));
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}
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if (regno == tdep->ppc_fpscr_regnum || regno == -1)
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supply_register (tdep->ppc_fpscr_regnum, fpregs + FPREG_FPSCR_OFFSET);
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}
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void
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ppcnbsd_fill_fpreg (char *fpregs, int regno)
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{
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struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
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int i;
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for (i = FP0_REGNUM; i <= FP0_REGNUM + 31; i++)
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{
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if (regno == i || regno == -1)
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regcache_collect (i, fpregs + FPREG_FPR_OFFSET (i - FP0_REGNUM));
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}
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if (regno == tdep->ppc_fpscr_regnum || regno == -1)
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regcache_collect (tdep->ppc_fpscr_regnum, fpregs + FPREG_FPSCR_OFFSET);
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}
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static void
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fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which,
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CORE_ADDR ignore)
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{
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char *regs, *fpregs;
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/* We get everything from one section. */
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if (which != 0)
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return;
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regs = core_reg_sect;
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fpregs = core_reg_sect + SIZEOF_STRUCT_REG;
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/* Integer registers. */
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ppcnbsd_supply_reg (regs, -1);
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/* Floating point registers. */
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ppcnbsd_supply_fpreg (fpregs, -1);
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}
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static void
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fetch_elfcore_registers (char *core_reg_sect, unsigned core_reg_size, int which,
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CORE_ADDR ignore)
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{
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switch (which)
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{
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case 0: /* Integer registers. */
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if (core_reg_size != SIZEOF_STRUCT_REG)
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warning ("Wrong size register set in core file.");
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else
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ppcnbsd_supply_reg (core_reg_sect, -1);
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break;
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case 2: /* Floating point registers. */
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if (core_reg_size != SIZEOF_STRUCT_FPREG)
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warning ("Wrong size FP register set in core file.");
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else
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ppcnbsd_supply_fpreg (core_reg_sect, -1);
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break;
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default:
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/* Don't know what kind of register request this is; just ignore it. */
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break;
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}
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}
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static struct core_fns ppcnbsd_core_fns =
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{
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bfd_target_unknown_flavour, /* core_flavour */
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default_check_format, /* check_format */
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default_core_sniffer, /* core_sniffer */
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fetch_core_registers, /* core_read_registers */
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NULL /* next */
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};
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static struct core_fns ppcnbsd_elfcore_fns =
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{
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bfd_target_elf_flavour, /* core_flavour */
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default_check_format, /* check_format */
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default_core_sniffer, /* core_sniffer */
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fetch_elfcore_registers, /* core_read_registers */
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NULL /* next */
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};
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static int
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ppcnbsd_pc_in_sigtramp (CORE_ADDR pc, char *func_name)
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{
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/* FIXME: Need to add support for kernel-provided signal trampolines. */
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return (nbsd_pc_in_sigtramp (pc, func_name));
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}
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static void
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ppcnbsd_init_abi (struct gdbarch_info info,
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struct gdbarch *gdbarch)
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{
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/* Stop at main. */
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set_gdbarch_frame_chain_valid (gdbarch, generic_func_frame_chain_valid);
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set_gdbarch_pc_in_sigtramp (gdbarch, ppcnbsd_pc_in_sigtramp);
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set_solib_svr4_fetch_link_map_offsets (gdbarch,
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nbsd_ilp32_solib_svr4_fetch_link_map_offsets);
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}
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void
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_initialize_ppcnbsd_tdep (void)
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{
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gdbarch_register_osabi (bfd_arch_powerpc, GDB_OSABI_NETBSD_ELF,
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ppcnbsd_init_abi);
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add_core_fns (&ppcnbsd_core_fns);
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add_core_fns (&ppcnbsd_elfcore_fns);
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}
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