mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-11-27 12:03:41 +08:00
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.
271 lines
8.0 KiB
C
271 lines
8.0 KiB
C
/* Target-dependent code for FreeBSD/aarch64.
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Copyright (C) 2017-2024 Free Software Foundation, 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 "gdbarch.h"
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#include "fbsd-tdep.h"
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#include "aarch64-tdep.h"
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#include "aarch64-fbsd-tdep.h"
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#include "inferior.h"
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#include "osabi.h"
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#include "solib-svr4.h"
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#include "target.h"
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#include "tramp-frame.h"
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#include "trad-frame.h"
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/* Register maps. */
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static const struct regcache_map_entry aarch64_fbsd_gregmap[] =
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{
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{ 30, AARCH64_X0_REGNUM, 8 }, /* x0 ... x29 */
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{ 1, AARCH64_LR_REGNUM, 8 },
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{ 1, AARCH64_SP_REGNUM, 8 },
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{ 1, AARCH64_PC_REGNUM, 8 },
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{ 1, AARCH64_CPSR_REGNUM, 4 },
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{ 0 }
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};
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static const struct regcache_map_entry aarch64_fbsd_fpregmap[] =
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{
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{ 32, AARCH64_V0_REGNUM, 16 }, /* v0 ... v31 */
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{ 1, AARCH64_FPSR_REGNUM, 4 },
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{ 1, AARCH64_FPCR_REGNUM, 4 },
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{ 0 }
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};
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/* Register numbers are relative to tdep->tls_regnum_base. */
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static const struct regcache_map_entry aarch64_fbsd_tls_regmap[] =
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{
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{ 1, 0, 8 }, /* tpidr */
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{ 0 }
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};
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/* In a signal frame, sp points to a 'struct sigframe' which is
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defined as:
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struct sigframe {
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siginfo_t sf_si;
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ucontext_t sf_uc;
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};
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ucontext_t is defined as:
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struct __ucontext {
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sigset_t uc_sigmask;
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mcontext_t uc_mcontext;
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...
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};
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The mcontext_t contains the general purpose register set followed
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by the floating point register set. The floating point register
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set is only valid if the _MC_FP_VALID flag is set in mc_flags. */
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#define AARCH64_SIGFRAME_UCONTEXT_OFFSET 80
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#define AARCH64_UCONTEXT_MCONTEXT_OFFSET 16
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#define AARCH64_MCONTEXT_FPREGS_OFFSET 272
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#define AARCH64_MCONTEXT_FLAGS_OFFSET 800
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#define AARCH64_MCONTEXT_FLAG_FP_VALID 0x1
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/* Implement the "init" method of struct tramp_frame. */
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static void
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aarch64_fbsd_sigframe_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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enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
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CORE_ADDR sp = get_frame_register_unsigned (this_frame, AARCH64_SP_REGNUM);
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CORE_ADDR mcontext_addr
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= (sp
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+ AARCH64_SIGFRAME_UCONTEXT_OFFSET
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+ AARCH64_UCONTEXT_MCONTEXT_OFFSET);
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gdb_byte buf[4];
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trad_frame_set_reg_regmap (this_cache, aarch64_fbsd_gregmap, mcontext_addr,
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regcache_map_entry_size (aarch64_fbsd_gregmap));
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if (target_read_memory (mcontext_addr + AARCH64_MCONTEXT_FLAGS_OFFSET, buf,
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4) == 0
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&& (extract_unsigned_integer (buf, 4, byte_order)
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& AARCH64_MCONTEXT_FLAG_FP_VALID))
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trad_frame_set_reg_regmap (this_cache, aarch64_fbsd_fpregmap,
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mcontext_addr + AARCH64_MCONTEXT_FPREGS_OFFSET,
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regcache_map_entry_size (aarch64_fbsd_fpregmap));
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trad_frame_set_id (this_cache, frame_id_build (sp, func));
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}
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static const struct tramp_frame aarch64_fbsd_sigframe =
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{
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SIGTRAMP_FRAME,
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4,
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{
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{0x910003e0, ULONGEST_MAX}, /* mov x0, sp */
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{0x91014000, ULONGEST_MAX}, /* add x0, x0, #SF_UC */
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{0xd2803428, ULONGEST_MAX}, /* mov x8, #SYS_sigreturn */
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{0xd4000001, ULONGEST_MAX}, /* svc 0x0 */
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{TRAMP_SENTINEL_INSN, ULONGEST_MAX}
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},
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aarch64_fbsd_sigframe_init
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};
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/* Register set definitions. */
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const struct regset aarch64_fbsd_gregset =
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{
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aarch64_fbsd_gregmap,
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regcache_supply_regset, regcache_collect_regset
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};
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const struct regset aarch64_fbsd_fpregset =
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{
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aarch64_fbsd_fpregmap,
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regcache_supply_regset, regcache_collect_regset
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};
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static void
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aarch64_fbsd_supply_tls_regset (const struct regset *regset,
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struct regcache *regcache,
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int regnum, const void *buf, size_t size)
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{
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struct gdbarch *gdbarch = regcache->arch ();
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aarch64_gdbarch_tdep *tdep = gdbarch_tdep<aarch64_gdbarch_tdep> (gdbarch);
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regcache->supply_regset (regset, tdep->tls_regnum_base, regnum, buf, size);
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}
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static void
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aarch64_fbsd_collect_tls_regset (const struct regset *regset,
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const struct regcache *regcache,
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int regnum, void *buf, size_t size)
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{
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struct gdbarch *gdbarch = regcache->arch ();
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aarch64_gdbarch_tdep *tdep = gdbarch_tdep<aarch64_gdbarch_tdep> (gdbarch);
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regcache->collect_regset (regset, tdep->tls_regnum_base, regnum, buf, size);
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}
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const struct regset aarch64_fbsd_tls_regset =
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{
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aarch64_fbsd_tls_regmap,
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aarch64_fbsd_supply_tls_regset, aarch64_fbsd_collect_tls_regset
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};
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/* Implement the "iterate_over_regset_sections" gdbarch method. */
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static void
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aarch64_fbsd_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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aarch64_gdbarch_tdep *tdep = gdbarch_tdep<aarch64_gdbarch_tdep> (gdbarch);
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cb (".reg", AARCH64_FBSD_SIZEOF_GREGSET, AARCH64_FBSD_SIZEOF_GREGSET,
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&aarch64_fbsd_gregset, NULL, cb_data);
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cb (".reg2", AARCH64_FBSD_SIZEOF_FPREGSET, AARCH64_FBSD_SIZEOF_FPREGSET,
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&aarch64_fbsd_fpregset, NULL, cb_data);
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if (tdep->has_tls ())
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cb (".reg-aarch-tls", AARCH64_FBSD_SIZEOF_TLSREGSET,
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AARCH64_FBSD_SIZEOF_TLSREGSET, &aarch64_fbsd_tls_regset,
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"TLS register", cb_data);
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}
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/* Implement the "core_read_description" gdbarch method. */
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static const struct target_desc *
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aarch64_fbsd_core_read_description (struct gdbarch *gdbarch,
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struct target_ops *target, bfd *abfd)
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{
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asection *tls = bfd_get_section_by_name (abfd, ".reg-aarch-tls");
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aarch64_features features;
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features.tls = tls != nullptr? 1 : 0;
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return aarch64_read_description (features);
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}
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/* Implement the get_thread_local_address gdbarch method. */
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static CORE_ADDR
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aarch64_fbsd_get_thread_local_address (struct gdbarch *gdbarch, ptid_t ptid,
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CORE_ADDR lm_addr, CORE_ADDR offset)
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{
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aarch64_gdbarch_tdep *tdep = gdbarch_tdep<aarch64_gdbarch_tdep> (gdbarch);
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struct regcache *regcache;
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regcache = get_thread_arch_regcache (current_inferior (), ptid, gdbarch);
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target_fetch_registers (regcache, tdep->tls_regnum_base);
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ULONGEST tpidr;
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if (regcache->cooked_read (tdep->tls_regnum_base, &tpidr) != REG_VALID)
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error (_("Unable to fetch %%tpidr"));
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/* %tpidr points to the TCB whose first member is the dtv
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pointer. */
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CORE_ADDR dtv_addr = tpidr;
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return fbsd_get_thread_local_address (gdbarch, dtv_addr, lm_addr, offset);
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}
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/* Implement the 'init_osabi' method of struct gdb_osabi_handler. */
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static void
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aarch64_fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
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{
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aarch64_gdbarch_tdep *tdep = gdbarch_tdep<aarch64_gdbarch_tdep> (gdbarch);
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/* Generic FreeBSD support. */
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fbsd_init_abi (info, gdbarch);
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set_solib_svr4_fetch_link_map_offsets (gdbarch,
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svr4_lp64_fetch_link_map_offsets);
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tramp_frame_prepend_unwinder (gdbarch, &aarch64_fbsd_sigframe);
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/* Enable longjmp. */
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tdep->jb_pc = 13;
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set_gdbarch_iterate_over_regset_sections
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(gdbarch, aarch64_fbsd_iterate_over_regset_sections);
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set_gdbarch_core_read_description (gdbarch,
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aarch64_fbsd_core_read_description);
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if (tdep->has_tls ())
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{
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set_gdbarch_fetch_tls_load_module_address (gdbarch,
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svr4_fetch_objfile_link_map);
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set_gdbarch_get_thread_local_address
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(gdbarch, aarch64_fbsd_get_thread_local_address);
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}
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}
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void _initialize_aarch64_fbsd_tdep ();
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void
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_initialize_aarch64_fbsd_tdep ()
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{
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gdbarch_register_osabi (bfd_arch_aarch64, 0, GDB_OSABI_FREEBSD,
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aarch64_fbsd_init_abi);
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}
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