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Add NetBSD/aarch64 gdbserver support

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The support is on par with NetBSD/amd64, thus GPR works,
single step and software breakpoint are operational, and the
SVR4 r_debug integration is functional.

gdbserver/ChangeLog:

         * netbsd-aarch64-low.cc: Add.
         * Makefile.in (SFILES): Register "netbsd-aarch64-low.c".
         * configure.srv: Add aarch64*-*-netbsd*.
This commit is contained in:
Kamil Rytarowski 2020-10-06 18:10:26 +02:00
parent 64c03bdb6e
commit 8e1d092929
2 changed files with 119 additions and 0 deletions
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6
gdbserver/configure.srv
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@ -61,6 +61,12 @@ case "${gdbserver_host}" in
ipa_obj="${ipa_obj} linux-aarch64-tdesc-ipa.o"
ipa_obj="${ipa_obj} arch/aarch64-ipa.o"
;;
aarch64*-*-netbsd*) srv_regobj=""
srv_tgtobj="netbsd-low.o netbsd-aarch64-low.o fork-child.o"
srv_tgtobj="${srv_tgtobj} nat/fork-inferior.o"
srv_tgtobj="${srv_tgtobj} nat/netbsd-nat.o"
srv_tgtobj="${srv_tgtobj} arch/aarch64-insn.o arch/aarch64.o"
;;
arm*-*-linux*) srv_tgtobj="$srv_linux_obj linux-arm-low.o"
srv_tgtobj="$srv_tgtobj linux-arm-tdesc.o"
srv_tgtobj="$srv_tgtobj linux-aarch32-low.o"

113
gdbserver/netbsd-aarch64-low.cc Normal file
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@ -0,0 +1,113 @@
/* Copyright (C) 2020 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include <sys/types.h>
#include <sys/ptrace.h>
#include <limits.h>
#include "server.h"
#include "netbsd-low.h"
#include "arch/aarch64.h"
#include "arch/aarch64-insn.h"
#include "tdesc.h"
/* The fill_function for the general-purpose register set. */
static void
netbsd_aarch64_fill_gregset (struct regcache *regcache, char *buf)
{
struct reg *r = (struct reg *) buf;
#define netbsd_aarch64_collect_gp(regnum, fld) do { \
collect_register (regcache, regnum, &r->fld); \
} while (0)
for (size_t i = 0; i < ARRAY_SIZE (r->r_reg); i++)
netbsd_aarch64_collect_gp (AARCH64_X0_REGNUM + i, r_reg[i]);
netbsd_aarch64_collect_gp (AARCH64_SP_REGNUM, r_sp);
netbsd_aarch64_collect_gp (AARCH64_PC_REGNUM, r_pc);
}
/* The store_function for the general-purpose register set. */
static void
netbsd_aarch64_store_gregset (struct regcache *regcache, const char *buf)
{
struct reg *r = (struct reg *) buf;
#define netbsd_aarch64_supply_gp(regnum, fld) do { \
supply_register (regcache, regnum, &r->fld); \
} while(0)
for (size_t i = 0; i < ARRAY_SIZE (r->r_reg); i++)
netbsd_aarch64_supply_gp (AARCH64_X0_REGNUM + i, r_reg[i]);
netbsd_aarch64_supply_gp (AARCH64_SP_REGNUM, r_sp);
netbsd_aarch64_supply_gp (AARCH64_PC_REGNUM, r_pc);
}
/* Description of all the aarch64-netbsd register sets. */
static const struct netbsd_regset_info netbsd_target_regsets[] =
{
/* General Purpose Registers. */
{PT_GETREGS, PT_SETREGS, sizeof (struct reg),
netbsd_aarch64_fill_gregset, netbsd_aarch64_store_gregset},
/* End of list marker. */
{0, 0, -1, NULL, NULL }
};
/* NetBSD target op definitions for the aarch64 architecture. */
class netbsd_aarch64_target : public netbsd_process_target
{
protected:
const netbsd_regset_info *get_regs_info () override;
void low_arch_setup () override;
};
/* Return the information to access registers. */
const netbsd_regset_info *
netbsd_aarch64_target::get_regs_info ()
{
return netbsd_target_regsets;
}
/* Architecture-specific setup for the current process. */
void
netbsd_aarch64_target::low_arch_setup ()
{
target_desc *tdesc
= aarch64_create_target_description (0, false);
static const char *expedite_regs_aarch64[] = { "x29", "sp", "pc", NULL };
init_target_desc (tdesc, expedite_regs_aarch64);
current_process ()->tdesc = tdesc;
}
/* The singleton target ops object. */
static netbsd_aarch64_target the_netbsd_aarch64_target;
/* The NetBSD target ops object. */
netbsd_process_target *the_netbsd_target = &the_netbsd_aarch64_target;