1 /* Target-dependent code for GNU/Linux on Tilera TILE-Gx processors.
3 Copyright (C) 2012-2016 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 #include "linux-tdep.h"
23 #include "glibc-tdep.h"
24 #include "solib-svr4.h"
28 #include "tramp-frame.h"
29 #include "trad-frame.h"
30 #include "tilegx-tdep.h"
32 /* Signal trampoline support. */
35 tilegx_linux_sigframe_init (const struct tramp_frame *self,
36 struct frame_info *this_frame,
37 struct trad_frame_cache *this_cache,
40 CORE_ADDR sp = get_frame_register_unsigned (this_frame, 54);
42 /* Base address of register save area. */
44 + 16 /* Skip ABI_SAVE_AREA. */
45 + 128 /* Skip SIGINFO. */
46 + 40; /* Skip UCONTEXT. */
48 /* Address of saved LR register (R56) which holds previous PC. */
49 CORE_ADDR prev_pc = base + 56 * 8;
53 for (i = 0; i < 56; i++)
54 trad_frame_set_reg_addr (this_cache, i, base + i * 8);
56 trad_frame_set_reg_value (this_cache, 64,
57 get_frame_memory_unsigned (this_frame, prev_pc, 8));
59 /* Save a frame ID. */
60 trad_frame_set_id (this_cache, frame_id_build (base, func));
63 static const struct tramp_frame tilegx_linux_rt_sigframe =
68 { 0x00045fe551483000ULL, -1 }, /* { moveli r10, 139 } */
69 { 0x286b180051485000ULL, -1 }, /* { swint1 } */
70 { TRAMP_SENTINEL_INSN, -1 }
72 tilegx_linux_sigframe_init
75 /* Register map; must match struct pt_regs in "ptrace.h". */
77 static const struct regcache_map_entry tilegx_linux_regmap[] =
79 { TILEGX_NUM_EASY_REGS, TILEGX_FIRST_EASY_REGNUM, 8 },
80 { 1, TILEGX_PC_REGNUM, 8 },
81 { 1, TILEGX_FAULTNUM_REGNUM, 8 },
85 #define TILEGX_LINUX_SIZEOF_GREGSET (64 * 8)
87 /* TILE-Gx Linux kernel register set. */
89 static const struct regset tilegx_linux_regset =
92 regcache_supply_regset, regcache_collect_regset
97 tilegx_iterate_over_regset_sections (struct gdbarch *gdbarch,
98 iterate_over_regset_sections_cb *cb,
100 const struct regcache *regcache)
102 cb (".reg", TILEGX_LINUX_SIZEOF_GREGSET, &tilegx_linux_regset,
106 /* OS specific initialization of gdbarch. */
109 tilegx_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
111 int arch_size = gdbarch_addr_bit (gdbarch);
113 linux_init_abi (info, gdbarch);
115 tramp_frame_prepend_unwinder (gdbarch, &tilegx_linux_rt_sigframe);
117 set_gdbarch_iterate_over_regset_sections
118 (gdbarch, tilegx_iterate_over_regset_sections);
120 /* GNU/Linux uses SVR4-style shared libraries. */
122 set_solib_svr4_fetch_link_map_offsets (gdbarch,
123 svr4_ilp32_fetch_link_map_offsets);
125 set_solib_svr4_fetch_link_map_offsets (gdbarch,
126 svr4_lp64_fetch_link_map_offsets);
128 /* Enable TLS support. */
129 set_gdbarch_fetch_tls_load_module_address (gdbarch,
130 svr4_fetch_objfile_link_map);
132 /* Shared library handling. */
133 set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
134 set_gdbarch_skip_solib_resolver (gdbarch, glibc_skip_solib_resolver);
137 /* Provide a prototype to silence -Wmissing-prototypes. */
138 extern initialize_file_ftype _initialize_tilegx_linux_tdep;
141 _initialize_tilegx_linux_tdep (void)
143 gdbarch_register_osabi (bfd_arch_tilegx, bfd_mach_tilegx, GDB_OSABI_LINUX,
144 tilegx_linux_init_abi);