1d506c26d9
This commit is the result of the following actions:
- Running gdb/copyright.py to update all of the copyright headers to
include 2024,
- Manually updating a few files the copyright.py script told me to
update, these files had copyright headers embedded within the
file,
- Regenerating gdbsupport/Makefile.in to refresh it's copyright
date,
- Using grep to find other files that still mentioned 2023. If
these files were updated last year from 2022 to 2023 then I've
updated them this year to 2024.
I'm sure I've probably missed some dates. Feel free to fix them up as
you spot them.
223 lines
6.7 KiB
C
223 lines
6.7 KiB
C
/* Target-dependent code for NetBSD/powerpc.
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Copyright (C) 2002-2024 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 3 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, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "gdbtypes.h"
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#include "osabi.h"
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#include "regcache.h"
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#include "regset.h"
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#include "trad-frame.h"
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#include "tramp-frame.h"
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#include "ppc-tdep.h"
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#include "netbsd-tdep.h"
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#include "ppc-tdep.h"
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#include "solib-svr4.h"
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/* Register offsets from <machine/reg.h>. */
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static ppc_reg_offsets ppcnbsd_reg_offsets;
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/* Core file support. */
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/* NetBSD/powerpc register sets. */
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const struct regset ppcnbsd_gregset =
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{
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&ppcnbsd_reg_offsets,
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ppc_supply_gregset
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};
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const struct regset ppcnbsd_fpregset =
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{
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&ppcnbsd_reg_offsets,
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ppc_supply_fpregset
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};
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/* Iterate over core file register note sections. */
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static void
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ppcnbsd_iterate_over_regset_sections (struct gdbarch *gdbarch,
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iterate_over_regset_sections_cb *cb,
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void *cb_data,
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const struct regcache *regcache)
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{
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cb (".reg", 148, 148, &ppcnbsd_gregset, NULL, cb_data);
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cb (".reg2", 264, 264, &ppcnbsd_fpregset, NULL, cb_data);
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}
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/* NetBSD is confused. It appears that 1.5 was using the correct SVR4
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convention but, 1.6 switched to the below broken convention. For
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the moment use the broken convention. Ulgh! */
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static enum return_value_convention
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ppcnbsd_return_value (struct gdbarch *gdbarch, struct value *function,
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struct type *valtype, struct regcache *regcache,
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gdb_byte *readbuf, const gdb_byte *writebuf)
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{
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#if 0
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if ((valtype->code () == TYPE_CODE_STRUCT
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|| valtype->code () == TYPE_CODE_UNION)
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&& !((valtype->length () == 16 || valtype->length () == 8)
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&& valtype->is_vector ())
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&& !(valtype->length () == 1
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|| valtype->length () == 2
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|| valtype->length () == 4
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|| valtype->length () == 8))
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return RETURN_VALUE_STRUCT_CONVENTION;
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else
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#endif
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return ppc_sysv_abi_broken_return_value (gdbarch, function, valtype,
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regcache, readbuf, writebuf);
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}
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/* Signal trampolines. */
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extern const struct tramp_frame ppcnbsd2_sigtramp;
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static void
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ppcnbsd_sigtramp_cache_init (const struct tramp_frame *self,
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frame_info_ptr this_frame,
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struct trad_frame_cache *this_cache,
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CORE_ADDR func)
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{
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struct gdbarch *gdbarch = get_frame_arch (this_frame);
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ppc_gdbarch_tdep *tdep = gdbarch_tdep<ppc_gdbarch_tdep> (gdbarch);
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CORE_ADDR addr, base;
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int i;
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base = get_frame_register_unsigned (this_frame,
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gdbarch_sp_regnum (gdbarch));
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if (self == &ppcnbsd2_sigtramp)
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addr = base + 0x10 + 2 * tdep->wordsize;
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else
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addr = base + 0x18 + 2 * tdep->wordsize;
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for (i = 0; i < ppc_num_gprs; i++, addr += tdep->wordsize)
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{
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int regnum = i + tdep->ppc_gp0_regnum;
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trad_frame_set_reg_addr (this_cache, regnum, addr);
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}
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trad_frame_set_reg_addr (this_cache, tdep->ppc_lr_regnum, addr);
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addr += tdep->wordsize;
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trad_frame_set_reg_addr (this_cache, tdep->ppc_cr_regnum, addr);
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addr += tdep->wordsize;
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trad_frame_set_reg_addr (this_cache, tdep->ppc_xer_regnum, addr);
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addr += tdep->wordsize;
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trad_frame_set_reg_addr (this_cache, tdep->ppc_ctr_regnum, addr);
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addr += tdep->wordsize;
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trad_frame_set_reg_addr (this_cache, gdbarch_pc_regnum (gdbarch),
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addr); /* SRR0? */
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addr += tdep->wordsize;
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/* Construct the frame ID using the function start. */
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trad_frame_set_id (this_cache, frame_id_build (base, func));
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}
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static const struct tramp_frame ppcnbsd_sigtramp =
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{
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SIGTRAMP_FRAME,
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4,
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{
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{ 0x3821fff0, ULONGEST_MAX }, /* add r1,r1,-16 */
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{ 0x4e800021, ULONGEST_MAX }, /* blrl */
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{ 0x38610018, ULONGEST_MAX }, /* addi r3,r1,24 */
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{ 0x38000127, ULONGEST_MAX }, /* li r0,295 */
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{ 0x44000002, ULONGEST_MAX }, /* sc */
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{ 0x38000001, ULONGEST_MAX }, /* li r0,1 */
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{ 0x44000002, ULONGEST_MAX }, /* sc */
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{ TRAMP_SENTINEL_INSN, ULONGEST_MAX }
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},
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ppcnbsd_sigtramp_cache_init
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};
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/* NetBSD 2.0 introduced a slightly different signal trampoline. */
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const struct tramp_frame ppcnbsd2_sigtramp =
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{
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SIGTRAMP_FRAME,
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4,
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{
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{ 0x3821fff0, ULONGEST_MAX }, /* add r1,r1,-16 */
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{ 0x4e800021, ULONGEST_MAX }, /* blrl */
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{ 0x38610010, ULONGEST_MAX }, /* addi r3,r1,16 */
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{ 0x38000127, ULONGEST_MAX }, /* li r0,295 */
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{ 0x44000002, ULONGEST_MAX }, /* sc */
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{ 0x38000001, ULONGEST_MAX }, /* li r0,1 */
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{ 0x44000002, ULONGEST_MAX }, /* sc */
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{ TRAMP_SENTINEL_INSN, ULONGEST_MAX }
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},
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ppcnbsd_sigtramp_cache_init
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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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nbsd_init_abi (info, gdbarch);
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/* For NetBSD, this is an on again, off again thing. Some systems
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do use the broken struct convention, and some don't. */
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set_gdbarch_return_value (gdbarch, ppcnbsd_return_value);
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/* NetBSD uses SVR4-style shared libraries. */
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set_solib_svr4_fetch_link_map_offsets
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(gdbarch, svr4_ilp32_fetch_link_map_offsets);
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set_gdbarch_iterate_over_regset_sections
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(gdbarch, ppcnbsd_iterate_over_regset_sections);
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tramp_frame_prepend_unwinder (gdbarch, &ppcnbsd_sigtramp);
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tramp_frame_prepend_unwinder (gdbarch, &ppcnbsd2_sigtramp);
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}
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void _initialize_ppcnbsd_tdep ();
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void
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_initialize_ppcnbsd_tdep ()
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{
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gdbarch_register_osabi (bfd_arch_powerpc, 0, GDB_OSABI_NETBSD,
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ppcnbsd_init_abi);
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/* Avoid initializing the register offsets again if they were
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already initialized by ppc-netbsd-nat.c. */
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if (ppcnbsd_reg_offsets.pc_offset == 0)
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{
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/* General-purpose registers. */
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ppcnbsd_reg_offsets.r0_offset = 0;
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ppcnbsd_reg_offsets.gpr_size = 4;
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ppcnbsd_reg_offsets.xr_size = 4;
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ppcnbsd_reg_offsets.lr_offset = 128;
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ppcnbsd_reg_offsets.cr_offset = 132;
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ppcnbsd_reg_offsets.xer_offset = 136;
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ppcnbsd_reg_offsets.ctr_offset = 140;
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ppcnbsd_reg_offsets.pc_offset = 144;
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ppcnbsd_reg_offsets.ps_offset = -1;
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ppcnbsd_reg_offsets.mq_offset = -1;
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/* Floating-point registers. */
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ppcnbsd_reg_offsets.f0_offset = 0;
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ppcnbsd_reg_offsets.fpscr_offset = 256;
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ppcnbsd_reg_offsets.fpscr_size = 4;
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}
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}
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