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/* Target-dependent code for GNU/Linux on Tilera TILE-Gx processors.
Copyright (C) 2012-2021 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 "defs.h"
#include "osabi.h"
#include "linux-tdep.h"
#include "glibc-tdep.h"
#include "solib-svr4.h"
#include "symtab.h"
#include "regcache.h"
#include "regset.h"
#include "tramp-frame.h"
#include "trad-frame.h"
#include "tilegx-tdep.h"
#include "gdbarch.h"
/* Signal trampoline support. */
static void
tilegx_linux_sigframe_init (const struct tramp_frame *self,
struct frame_info *this_frame,
struct trad_frame_cache *this_cache,
CORE_ADDR func)
{
CORE_ADDR sp = get_frame_register_unsigned (this_frame, 54);
/* Base address of register save area. */
CORE_ADDR base = sp
+ 16 /* Skip ABI_SAVE_AREA. */
+ 128 /* Skip SIGINFO. */
+ 40; /* Skip UCONTEXT. */
/* Address of saved LR register (R56) which holds previous PC. */
CORE_ADDR prev_pc = base + 56 * 8;
int i;
for (i = 0; i < 56; i++)
trad_frame_set_reg_addr (this_cache, i, base + i * 8);
trad_frame_set_reg_value (this_cache, 64,
get_frame_memory_unsigned (this_frame, prev_pc, 8));
/* Save a frame ID. */
trad_frame_set_id (this_cache, frame_id_build (base, func));
}
static const struct tramp_frame tilegx_linux_rt_sigframe =
{
SIGTRAMP_FRAME,
8,
{
{ 0x00045fe551483000ULL, ULONGEST_MAX }, /* { moveli r10, 139 } */
{ 0x286b180051485000ULL, ULONGEST_MAX }, /* { swint1 } */
{ TRAMP_SENTINEL_INSN, ULONGEST_MAX }
},
tilegx_linux_sigframe_init
};
/* Register map; must match struct pt_regs in "ptrace.h". */
static const struct regcache_map_entry tilegx_linux_regmap[] =
{
{ TILEGX_NUM_EASY_REGS, TILEGX_FIRST_EASY_REGNUM, 8 },
{ 1, TILEGX_PC_REGNUM, 8 },
{ 1, TILEGX_FAULTNUM_REGNUM, 8 },
{ 0 }
};
#define TILEGX_LINUX_SIZEOF_GREGSET (64 * 8)
/* TILE-Gx Linux kernel register set. */
static const struct regset tilegx_linux_regset =
{
tilegx_linux_regmap,
regcache_supply_regset, regcache_collect_regset
};
static void
tilegx_iterate_over_regset_sections (struct gdbarch *gdbarch,
iterate_over_regset_sections_cb *cb,
void *cb_data,
const struct regcache *regcache)
{
cb (".reg", TILEGX_LINUX_SIZEOF_GREGSET, TILEGX_LINUX_SIZEOF_GREGSET,
&tilegx_linux_regset, NULL, cb_data);
}
/* OS specific initialization of gdbarch. */
static void
tilegx_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
int arch_size = gdbarch_addr_bit (gdbarch);
linux_init_abi (info, gdbarch, 0);
tramp_frame_prepend_unwinder (gdbarch, &tilegx_linux_rt_sigframe);
set_gdbarch_iterate_over_regset_sections
(gdbarch, tilegx_iterate_over_regset_sections);
/* GNU/Linux uses SVR4-style shared libraries. */
if (arch_size == 32)
set_solib_svr4_fetch_link_map_offsets (gdbarch,
svr4_ilp32_fetch_link_map_offsets);
else
set_solib_svr4_fetch_link_map_offsets (gdbarch,
svr4_lp64_fetch_link_map_offsets);
/* Enable TLS support. */
set_gdbarch_fetch_tls_load_module_address (gdbarch,
svr4_fetch_objfile_link_map);
/* Shared library handling. */
set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
set_gdbarch_skip_solib_resolver (gdbarch, glibc_skip_solib_resolver);
}
void _initialize_tilegx_linux_tdep ();
void
_initialize_tilegx_linux_tdep ()
{
gdbarch_register_osabi (bfd_arch_tilegx, bfd_mach_tilegx, GDB_OSABI_LINUX,
tilegx_linux_init_abi);
}
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