Add FreeBSD/aarch64 architecture.
Support for collecting and supplying general purpose and floating point register sets is provided along with signal frame unwinding. gdb/ChangeLog: * Makefile.in (ALL_64_TARGET_OBS): Add aarch64-fbsd-tdep.o. (ALLDEPFILES): Add aarch64-fbsd-tdep.c. * NEWS: Mention new FreeBSD/aarch64 target. * configure.tgt: Add aarch64*-*-freebsd*. * aarch64-fbsd-tdep.c: New file. * aarch64-fbsd-tdep.h: New file.
This commit is contained in:
John Baldwin
parent
7610297ab5
commit
c0f84956d0
@ -1,3 +1,12 @@
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2017-09-06 John Baldwin <jhb@FreeBSD.org>
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* Makefile.in (ALL_64_TARGET_OBS): Add aarch64-fbsd-tdep.o.
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(ALLDEPFILES): Add aarch64-fbsd-tdep.c.
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* NEWS: Mention new FreeBSD/aarch64 target.
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* configure.tgt: Add aarch64*-*-freebsd*.
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* aarch64-fbsd-tdep.c: New file.
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* aarch64-fbsd-tdep.h: New file.
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2017-09-06 Kamil Rytarowski <n54@gmx.com>
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* MAINTAINERS (Write After Approval): Add Kamil Rytarowski.
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@ -753,6 +753,7 @@ TARGET_OBS = @TARGET_OBS@
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# All target-dependent objects files that require 64-bit CORE_ADDR
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# (used with --enable-targets=all --enable-64-bit-bfd).
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ALL_64_TARGET_OBS = \
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aarch64-fbsd-tdep.o \
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aarch64-insn.o \
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aarch64-linux-tdep.o \
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aarch64-newlib-tdep.o \
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@ -2496,6 +2497,7 @@ force_update:
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MAKEOVERRIDES =
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ALLDEPFILES = \
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aarch64-fbsd-tdep.c \
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aarch64-linux-nat.c \
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aarch64-linux-tdep.c \
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aarch64-newlib-tdep.c \
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4
gdb/NEWS
4
gdb/NEWS
@ -92,6 +92,10 @@ show debug separate-debug-file
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(gdb) p (float) var
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$3 = 3.14
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* New targets
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FreeBSD/aarch64 aarch64*-*-freebsd*
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*** Changes in GDB 8.0
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* GDB now supports access to the PKU register on GNU/Linux. The register is
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205
gdb/aarch64-fbsd-tdep.c
Normal file
205
gdb/aarch64-fbsd-tdep.c
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@ -0,0 +1,205 @@
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/* Target-dependent code for FreeBSD/aarch64.
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Copyright (C) 2017 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 "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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/* 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_MCONTEXT_REG_SIZE 8
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#define AARCH64_MCONTEXT_FPREG_SIZE 16
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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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struct frame_info *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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int i;
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for (i = 0; i < 30; i++)
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{
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trad_frame_set_reg_addr (this_cache,
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AARCH64_X0_REGNUM + i,
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mcontext_addr + i * AARCH64_MCONTEXT_REG_SIZE);
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}
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trad_frame_set_reg_addr (this_cache, AARCH64_LR_REGNUM,
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mcontext_addr + 30 * AARCH64_MCONTEXT_REG_SIZE);
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trad_frame_set_reg_addr (this_cache, AARCH64_SP_REGNUM,
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mcontext_addr + 31 * AARCH64_MCONTEXT_REG_SIZE);
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trad_frame_set_reg_addr (this_cache, AARCH64_PC_REGNUM,
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mcontext_addr + 32 * AARCH64_MCONTEXT_REG_SIZE);
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trad_frame_set_reg_addr (this_cache, AARCH64_CPSR_REGNUM,
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mcontext_addr + 33 * AARCH64_MCONTEXT_REG_SIZE);
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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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{
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for (i = 0; i < 32; i++)
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{
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trad_frame_set_reg_addr (this_cache, AARCH64_V0_REGNUM + i,
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mcontext_addr
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+ AARCH64_MCONTEXT_FPREGS_OFFSET
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+ i * AARCH64_MCONTEXT_FPREG_SIZE);
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}
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trad_frame_set_reg_addr (this_cache, AARCH64_FPSR_REGNUM,
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mcontext_addr + AARCH64_MCONTEXT_FPREGS_OFFSET
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+ 32 * AARCH64_MCONTEXT_FPREG_SIZE);
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trad_frame_set_reg_addr (this_cache, AARCH64_FPCR_REGNUM,
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mcontext_addr + AARCH64_MCONTEXT_FPREGS_OFFSET
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+ 32 * AARCH64_MCONTEXT_FPREG_SIZE + 4);
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}
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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, -1}, /* mov x0, sp */
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{0x91014000, -1}, /* add x0, x0, #SF_UC */
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{0xd2803428, -1}, /* mov x8, #SYS_sigreturn */
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{0xd4000001, -1}, /* svc 0x0 */
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{TRAMP_SENTINEL_INSN, -1}
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},
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aarch64_fbsd_sigframe_init
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};
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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 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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/* Implement the "regset_from_core_section" 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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cb (".reg", AARCH64_FBSD_SIZEOF_GREGSET, &aarch64_fbsd_gregset,
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NULL, cb_data);
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cb (".reg2", AARCH64_FBSD_SIZEOF_FPREGSET, &aarch64_fbsd_fpregset,
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NULL, cb_data);
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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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struct gdbarch_tdep *tdep = 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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}
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void
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_initialize_aarch64_fbsd_tdep (void)
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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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33
gdb/aarch64-fbsd-tdep.h
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33
gdb/aarch64-fbsd-tdep.h
Normal file
@ -0,0 +1,33 @@
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/* FreeBSD/aarch64 target support, prototypes.
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Copyright (C) 2017 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 "regset.h"
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/* The general-purpose regset consists of 30 X registers, plus LR, SP,
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ELR, and SPSR registers. SPSR is 32 bits but the structure is
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passed to 64 bit alignment. */
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#define AARCH64_FBSD_SIZEOF_GREGSET (34 * X_REGISTER_SIZE)
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/* The fp regset consists of 32 V registers, plus FPSR and FPCR which
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are 4 bytes wide each, and the whole structure is padded to 128 bit
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alignment. */
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#define AARCH64_FBSD_SIZEOF_FPREGSET (33 * V_REGISTER_SIZE)
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extern const struct regset aarch64_fbsd_gregset;
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extern const struct regset aarch64_fbsd_fpregset;
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@ -44,6 +44,11 @@ aarch64*-*-elf | aarch64*-*-rtems*)
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gdb_target_obs="aarch64-tdep.o aarch64-newlib-tdep.o aarch64-insn.o"
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;;
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aarch64*-*-freebsd*)
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# Target: FreeBSD/aarch64
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gdb_target_obs="aarch64-tdep.o aarch64-fbsd-tdep.o aarch64-insn.o"
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;;
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aarch64*-*-linux*)
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# Target: AArch64 linux
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gdb_target_obs="aarch64-tdep.o aarch64-linux-tdep.o aarch64-insn.o \
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