146 lines
4.2 KiB
C
146 lines
4.2 KiB
C
/* Target-dependent code for GNU/Linux on Tilera TILE-Gx processors.
|
|
|
|
Copyright (C) 2012-2016 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"
|
|
|
|
/* 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 pc = get_frame_register_unsigned (this_frame, 64);
|
|
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, -1 }, /* { moveli r10, 139 } */
|
|
{ 0x286b180051485000ULL, -1 }, /* { swint1 } */
|
|
{ TRAMP_SENTINEL_INSN, -1 }
|
|
},
|
|
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_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);
|
|
|
|
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);
|
|
}
|
|
|
|
/* Provide a prototype to silence -Wmissing-prototypes. */
|
|
extern initialize_file_ftype _initialize_tilegx_linux_tdep;
|
|
|
|
void
|
|
_initialize_tilegx_linux_tdep (void)
|
|
{
|
|
gdbarch_register_osabi (bfd_arch_tilegx, bfd_mach_tilegx, GDB_OSABI_LINUX,
|
|
tilegx_linux_init_abi);
|
|
}
|