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- /* Target-dependent code for GNU/Linux on Xtensa processors.
- Copyright (C) 2007-2022 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 "defs.h"
- #include "xtensa-tdep.h"
- #include "osabi.h"
- #include "linux-tdep.h"
- #include "solib-svr4.h"
- #include "symtab.h"
- #include "gdbarch.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)
- {
- xtensa_gdbarch_tdep *tdep = (xtensa_gdbarch_tdep *) gdbarch_tdep (gdbarch);
- if (tdep->num_nopriv_regs < tdep->num_regs)
- {
- tdep->num_pseudo_regs += tdep->num_regs - tdep->num_nopriv_regs;
- tdep->num_regs = tdep->num_nopriv_regs;
- set_gdbarch_num_regs (gdbarch, tdep->num_regs);
- set_gdbarch_num_pseudo_regs (gdbarch, tdep->num_pseudo_regs);
- }
- linux_init_abi (info, gdbarch, 0);
- set_solib_svr4_fetch_link_map_offsets
- (gdbarch, linux_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);
- }
- void _initialize_xtensa_linux_tdep ();
- void
- _initialize_xtensa_linux_tdep ()
- {
- gdbarch_register_osabi (bfd_arch_xtensa, bfd_mach_xtensa, GDB_OSABI_LINUX,
- xtensa_linux_init_abi);
- }
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