1 /* Target-dependent code for GNU/Linux on Xtensa processors.
3 Copyright (C) 2007-2014 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 "solib-svr4.h"
26 /* This enum represents the signals' numbers on the Xtensa
27 architecture. It just contains the signal definitions which are
28 different from the generic implementation.
30 It is derived from the file <arch/xtensa/include/uapi/asm/signal.h>,
31 from the Linux kernel tree. */
35 XTENSA_LINUX_SIGRTMIN = 32,
36 XTENSA_LINUX_SIGRTMAX = 63,
39 /* Implementation of `gdbarch_gdb_signal_from_target', as defined in
42 static enum gdb_signal
43 xtensa_linux_gdb_signal_from_target (struct gdbarch *gdbarch,
46 if (signal >= XTENSA_LINUX_SIGRTMIN && signal <= XTENSA_LINUX_SIGRTMAX)
48 int offset = signal - XTENSA_LINUX_SIGRTMIN;
51 return GDB_SIGNAL_REALTIME_32;
53 return (enum gdb_signal) (offset - 1
54 + (int) GDB_SIGNAL_REALTIME_33);
56 else if (signal > XTENSA_LINUX_SIGRTMAX)
57 return GDB_SIGNAL_UNKNOWN;
59 return linux_gdb_signal_from_target (gdbarch, signal);
62 /* Implementation of `gdbarch_gdb_signal_to_target', as defined in
66 xtensa_linux_gdb_signal_to_target (struct gdbarch *gdbarch,
67 enum gdb_signal signal)
71 /* GDB_SIGNAL_REALTIME_32 is not continuous in <gdb/signals.def>,
72 therefore we have to handle it here. */
73 case GDB_SIGNAL_REALTIME_32:
74 return XTENSA_LINUX_SIGRTMIN;
76 /* GDB_SIGNAL_REALTIME_64 is not valid on Xtensa. */
77 case GDB_SIGNAL_REALTIME_64:
81 /* GDB_SIGNAL_REALTIME_33 to _63 are continuous.
83 Xtensa does not have _64. */
84 if (signal >= GDB_SIGNAL_REALTIME_33
85 && signal <= GDB_SIGNAL_REALTIME_63)
87 int offset = signal - GDB_SIGNAL_REALTIME_33;
89 return XTENSA_LINUX_SIGRTMIN + 1 + offset;
92 return linux_gdb_signal_to_target (gdbarch, signal);
95 /* OS specific initialization of gdbarch. */
98 xtensa_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
100 linux_init_abi (info, gdbarch);
102 set_solib_svr4_fetch_link_map_offsets
103 (gdbarch, svr4_ilp32_fetch_link_map_offsets);
105 set_gdbarch_gdb_signal_from_target (gdbarch,
106 xtensa_linux_gdb_signal_from_target);
107 set_gdbarch_gdb_signal_to_target (gdbarch,
108 xtensa_linux_gdb_signal_to_target);
111 /* Provide a prototype to silence -Wmissing-prototypes. */
112 extern initialize_file_ftype _initialize_xtensa_linux_tdep;
115 _initialize_xtensa_linux_tdep (void)
117 gdbarch_register_osabi (bfd_arch_xtensa, bfd_mach_xtensa, GDB_OSABI_LINUX,
118 xtensa_linux_init_abi);