| /* Target-dependent code for GNU/Linux on Tilera TILE-Gx processors. |
| |
| Copyright (C) 2012-2024 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 "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, |
| const frame_info_ptr &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); |
| } |