eb14d40688
It will be used when one wants to convert between the internal GDB signal representation (enum gdb_signal) and the target's representation. The idea of this patch came from a chat between Pedro and I on IRC, plus the discussion of my patches to add the new $_exitsignal convenience variable: <http://sourceware.org/ml/gdb-patches/2013-06/msg00452.html> <http://sourceware.org/ml/gdb-patches/2013-06/msg00352.html> What I did was to investigate, on the Linux kernel, which targets shared the signal numbers definition with the generic definition, present at <include/uapi/asm-generic/signal.h>. For the record, I used linux-3.10-rc7 as the main source of information, always looking at <arch/<ARCH_NAME>/include/uapi/asm/signal.h>. For SIGRTMAX (which defaults to _NSIG in most cases), I had to look at different signal-related files, but most of them (except MIPS) were defined to 64 anyway. Then, with all the differences in hand, I implemented the bits on each target. 2013-08-09 Sergio Durigan Junior <sergiodj@redhat.com> * linux-tdep.c: Define enum with generic signal numbers. (linux_gdb_signal_from_target): New function. (linux_gdb_signal_to_target): Likewise. (linux_init_abi): Set gdbarch_gdb_signal_{to,from}_target methods to the functions above. * linux-tdep.h (linux_gdb_signal_from_target): New prototype. (linux_gdb_signal_to_target): Likewise. * alpha-linux-tdep.c: Define new enum with signals different from generic Linux kernel. (alpha_linux_gdb_signal_from_target): New function. (alpha_linux_gdb_signal_to_target): Likewise. (alpha_linux_init_abi): Set gdbarch_gdb_signal_{to,from}_target with the functions mentioned above. * avr-tdep.c: Define enum with differences between Linux kernel and AVR signals. (avr_linux_gdb_signal_from_target): New function. (avr_linux_gdb_signal_to_target): Likewise. (avr_gdbarch_init): Set gdbarch_gdb_signal_{to,from}_target to the functions mentioned above. * sparc-linux-tdep.c: Define enum with differences between SPARC and generic Linux kernel signal numbers. (sparc32_linux_gdb_signal_from_target): New function. (sparc32_linux_gdb_signal_to_target): Likewise. (sparc32_linux_init_abi): Set gdbarch_gdb_signal_{to,from}_target to the functions defined above. * xtensa-linux-tdep.c: Define enum with differences between Xtensa and Linux kernel generic signals. (xtensa_linux_gdb_signal_from_target): New function. (xtensa_linux_gdb_signal_to_target): Likewise. (xtensa_linux_init_abi): Set gdbarch_gdb_signal_to_target to the functions defined above. * mips-linux-tdep.c: Define enum with differences between signals in MIPS and Linux kernel generic ones. (mips_gdb_signal_to_target): New function. (mips_gdb_signal_from_target): Redefine to use new enum, handle only different signals from the Linux kernel generic. (mips_linux_init_abi): Set gdbarch_gdb_signal_{to,from}_target the functions defined above. * mips-linux-tdep.h (enum mips_signals): Remove.
119 lines
3.4 KiB
C
119 lines
3.4 KiB
C
/* Target-dependent code for GNU/Linux on Xtensa processors.
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Copyright (C) 2007-2013 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "osabi.h"
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#include "linux-tdep.h"
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#include "solib-svr4.h"
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#include "symtab.h"
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/* This enum represents the signals' numbers on the Xtensa
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architecture. It just contains the signal definitions which are
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different from the generic implementation.
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It is derived from the file <arch/xtensa/include/uapi/asm/signal.h>,
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from the Linux kernel tree. */
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enum
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{
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XTENSA_LINUX_SIGRTMIN = 32,
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XTENSA_LINUX_SIGRTMAX = 63,
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};
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/* Implementation of `gdbarch_gdb_signal_from_target', as defined in
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gdbarch.h. */
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static enum gdb_signal
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xtensa_linux_gdb_signal_from_target (struct gdbarch *gdbarch,
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int signal)
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{
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if (signal >= XTENSA_LINUX_SIGRTMIN && signal <= XTENSA_LINUX_SIGRTMAX)
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{
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int offset = signal - XTENSA_LINUX_SIGRTMIN;
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if (offset == 0)
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return GDB_SIGNAL_REALTIME_32;
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else
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return (enum gdb_signal) (offset - 1
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+ (int) GDB_SIGNAL_REALTIME_33);
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}
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else if (signal > XTENSA_LINUX_SIGRTMAX)
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return GDB_SIGNAL_UNKNOWN;
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return linux_gdb_signal_from_target (gdbarch, signal);
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}
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/* Implementation of `gdbarch_gdb_signal_to_target', as defined in
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gdbarch.h. */
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static int
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xtensa_linux_gdb_signal_to_target (struct gdbarch *gdbarch,
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enum gdb_signal signal)
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{
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switch (signal)
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{
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/* GDB_SIGNAL_REALTIME_32 is not continuous in <gdb/signals.def>,
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therefore we have to handle it here. */
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case GDB_SIGNAL_REALTIME_32:
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return XTENSA_LINUX_SIGRTMIN;
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/* GDB_SIGNAL_REALTIME_64 is not valid on Xtensa. */
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case GDB_SIGNAL_REALTIME_64:
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return -1;
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}
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/* GDB_SIGNAL_REALTIME_33 to _63 are continuous.
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Xtensa does not have _64. */
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if (signal >= GDB_SIGNAL_REALTIME_33
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&& signal <= GDB_SIGNAL_REALTIME_63)
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{
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int offset = signal - GDB_SIGNAL_REALTIME_33;
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return XTENSA_LINUX_SIGRTMIN + 1 + offset;
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}
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return linux_gdb_signal_to_target (gdbarch, signal);
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}
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/* OS specific initialization of gdbarch. */
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static void
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xtensa_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
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{
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linux_init_abi (info, gdbarch);
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set_solib_svr4_fetch_link_map_offsets
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(gdbarch, svr4_ilp32_fetch_link_map_offsets);
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set_gdbarch_gdb_signal_from_target (gdbarch,
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xtensa_linux_gdb_signal_from_target);
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set_gdbarch_gdb_signal_to_target (gdbarch,
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xtensa_linux_gdb_signal_to_target);
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}
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/* Provide a prototype to silence -Wmissing-prototypes. */
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extern initialize_file_ftype _initialize_xtensa_linux_tdep;
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void
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_initialize_xtensa_linux_tdep (void)
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{
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gdbarch_register_osabi (bfd_arch_xtensa, bfd_mach_xtensa, GDB_OSABI_LINUX,
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xtensa_linux_init_abi);
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}
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