GDB (xrefs)
/tmp/gdb-7.10/gdb/xtensa-linux-tdep.c
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1 /* Target-dependent code for GNU/Linux on Xtensa processors.
2 
3  Copyright (C) 2007-2015 Free Software Foundation, Inc.
4 
5  This file is part of GDB.
6 
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.
11 
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.
16 
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/>. */
19 
20 #include "defs.h"
21 #include "osabi.h"
22 #include "linux-tdep.h"
23 #include "solib-svr4.h"
24 #include "symtab.h"
25 
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.
29 
30  It is derived from the file <arch/xtensa/include/uapi/asm/signal.h>,
31  from the Linux kernel tree. */
32 
33 enum
34  {
37  };
38 
39 /* Implementation of `gdbarch_gdb_signal_from_target', as defined in
40  gdbarch.h. */
41 
42 static enum gdb_signal
44  int signal)
45 {
46  if (signal >= XTENSA_LINUX_SIGRTMIN && signal <= XTENSA_LINUX_SIGRTMAX)
47  {
48  int offset = signal - XTENSA_LINUX_SIGRTMIN;
49 
50  if (offset == 0)
51  return GDB_SIGNAL_REALTIME_32;
52  else
53  return (enum gdb_signal) (offset - 1
54  + (int) GDB_SIGNAL_REALTIME_33);
55  }
56  else if (signal > XTENSA_LINUX_SIGRTMAX)
57  return GDB_SIGNAL_UNKNOWN;
58 
59  return linux_gdb_signal_from_target (gdbarch, signal);
60 }
61 
62 /* Implementation of `gdbarch_gdb_signal_to_target', as defined in
63  gdbarch.h. */
64 
65 static int
67  enum gdb_signal signal)
68 {
69  switch (signal)
70  {
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;
75 
76  /* GDB_SIGNAL_REALTIME_64 is not valid on Xtensa. */
77  case GDB_SIGNAL_REALTIME_64:
78  return -1;
79  }
80 
81  /* GDB_SIGNAL_REALTIME_33 to _63 are continuous.
82 
83  Xtensa does not have _64. */
84  if (signal >= GDB_SIGNAL_REALTIME_33
85  && signal <= GDB_SIGNAL_REALTIME_63)
86  {
87  int offset = signal - GDB_SIGNAL_REALTIME_33;
88 
89  return XTENSA_LINUX_SIGRTMIN + 1 + offset;
90  }
91 
92  return linux_gdb_signal_to_target (gdbarch, signal);
93 }
94 
95 /* OS specific initialization of gdbarch. */
96 
97 static void
99 {
100  linux_init_abi (info, gdbarch);
101 
104 
109 }
110 
111 /* Provide a prototype to silence -Wmissing-prototypes. */
113 
114 void
116 {
117  gdbarch_register_osabi (bfd_arch_xtensa, bfd_mach_xtensa, GDB_OSABI_LINUX,
119 }
static enum gdb_signal xtensa_linux_gdb_signal_from_target(struct gdbarch *gdbarch, int signal)
void set_gdbarch_gdb_signal_to_target(struct gdbarch *gdbarch, gdbarch_gdb_signal_to_target_ftype gdb_signal_to_target)
Definition: gdbarch.c:3953
void set_gdbarch_gdb_signal_from_target(struct gdbarch *gdbarch, gdbarch_gdb_signal_from_target_ftype gdb_signal_from_target)
Definition: gdbarch.c:3929
void linux_init_abi(struct gdbarch_info info, struct gdbarch *gdbarch)
Definition: linux-tdep.c:2427
struct link_map_offsets * svr4_ilp32_fetch_link_map_offsets(void)
Definition: solib-svr4.c:3149
initialize_file_ftype _initialize_xtensa_linux_tdep
enum gdb_signal linux_gdb_signal_from_target(struct gdbarch *gdbarch, int signal)
Definition: linux-tdep.c:2002
void initialize_file_ftype(void)
Definition: defs.h:281
static int xtensa_linux_gdb_signal_to_target(struct gdbarch *gdbarch, enum gdb_signal signal)
void set_solib_svr4_fetch_link_map_offsets(struct gdbarch *gdbarch, struct link_map_offsets *(*flmo)(void))
Definition: solib-svr4.c:3108
const char const char int
Definition: command.h:229
int linux_gdb_signal_to_target(struct gdbarch *gdbarch, enum gdb_signal signal)
Definition: linux-tdep.c:2125
int offset
Definition: agent.c:65
void gdbarch_register_osabi(enum bfd_architecture arch, unsigned long machine, enum gdb_osabi osabi, void(*init_osabi)(struct gdbarch_info, struct gdbarch *))
Definition: osabi.c:148
static void xtensa_linux_init_abi(struct gdbarch_info info, struct gdbarch *gdbarch)