/* Target-dependent code for GNU/Linux on Xtensa processors.
- Copyright 2007, 2008, 2009 Free Software Foundation, Inc.
+ Copyright (C) 2007-2015 Free Software Foundation, Inc.
This file is part of GDB.
#include "defs.h"
#include "osabi.h"
-
+#include "linux-tdep.h"
#include "solib-svr4.h"
#include "symtab.h"
+/* This enum represents the signals' numbers on the Xtensa
+ architecture. It just contains the signal definitions which are
+ different from the generic implementation.
+
+ It is derived from the file <arch/xtensa/include/uapi/asm/signal.h>,
+ from the Linux kernel tree. */
+
+enum
+ {
+ XTENSA_LINUX_SIGRTMIN = 32,
+ XTENSA_LINUX_SIGRTMAX = 63,
+ };
+
+/* Implementation of `gdbarch_gdb_signal_from_target', as defined in
+ gdbarch.h. */
+
+static enum gdb_signal
+xtensa_linux_gdb_signal_from_target (struct gdbarch *gdbarch,
+ int signal)
+{
+ if (signal >= XTENSA_LINUX_SIGRTMIN && signal <= XTENSA_LINUX_SIGRTMAX)
+ {
+ int offset = signal - XTENSA_LINUX_SIGRTMIN;
+
+ if (offset == 0)
+ return GDB_SIGNAL_REALTIME_32;
+ else
+ return (enum gdb_signal) (offset - 1
+ + (int) GDB_SIGNAL_REALTIME_33);
+ }
+ else if (signal > XTENSA_LINUX_SIGRTMAX)
+ return GDB_SIGNAL_UNKNOWN;
+
+ return linux_gdb_signal_from_target (gdbarch, signal);
+}
+
+/* Implementation of `gdbarch_gdb_signal_to_target', as defined in
+ gdbarch.h. */
+
+static int
+xtensa_linux_gdb_signal_to_target (struct gdbarch *gdbarch,
+ enum gdb_signal signal)
+{
+ switch (signal)
+ {
+ /* GDB_SIGNAL_REALTIME_32 is not continuous in <gdb/signals.def>,
+ therefore we have to handle it here. */
+ case GDB_SIGNAL_REALTIME_32:
+ return XTENSA_LINUX_SIGRTMIN;
+
+ /* GDB_SIGNAL_REALTIME_64 is not valid on Xtensa. */
+ case GDB_SIGNAL_REALTIME_64:
+ return -1;
+ }
+
+ /* GDB_SIGNAL_REALTIME_33 to _63 are continuous.
+
+ Xtensa does not have _64. */
+ if (signal >= GDB_SIGNAL_REALTIME_33
+ && signal <= GDB_SIGNAL_REALTIME_63)
+ {
+ int offset = signal - GDB_SIGNAL_REALTIME_33;
+
+ return XTENSA_LINUX_SIGRTMIN + 1 + offset;
+ }
+
+ return linux_gdb_signal_to_target (gdbarch, signal);
+}
+
/* OS specific initialization of gdbarch. */
static void
xtensa_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
+ linux_init_abi (info, gdbarch);
+
set_solib_svr4_fetch_link_map_offsets
(gdbarch, svr4_ilp32_fetch_link_map_offsets);
+
+ set_gdbarch_gdb_signal_from_target (gdbarch,
+ xtensa_linux_gdb_signal_from_target);
+ set_gdbarch_gdb_signal_to_target (gdbarch,
+ xtensa_linux_gdb_signal_to_target);
+
+ /* Enable TLS support. */
+ set_gdbarch_fetch_tls_load_module_address (gdbarch,
+ svr4_fetch_objfile_link_map);
}
+/* Provide a prototype to silence -Wmissing-prototypes. */
+extern initialize_file_ftype _initialize_xtensa_linux_tdep;
+
void
_initialize_xtensa_linux_tdep (void)
{