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- /* Target-dependent code for GNU/Linux on Tilera TILE-Gx processors.
- Copyright (C) 2012-2022 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,
- linux_ilp32_fetch_link_map_offsets);
- else
- set_solib_svr4_fetch_link_map_offsets (gdbarch,
- linux_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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