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binutils-gdb/gdbsupport/signals.cc
Simon Marchi 554822d670 gdbsupport: remove #ifndef REALTIME_LO in signals.cc 
REALTIME_LO was only possibly previously defined in config/nm-nto.h,
which is now removed.  So we can remove the #ifndef protecting against a
redefinition of REALTIME_LO in gdbsupport/signals.cc.

Change-Id: I021b9518ceaa6223bd480ff1e07e9a978b0b241e
Approved-by: Kevin Buettner <kevinb@redhat.com>
2024-08-12 10:21:15 -04:00

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/* Target signal translation functions for GDB.
Copyright (C) 1990-2024 Free Software Foundation, Inc.
Contributed by Cygnus Support.
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/>. */
#ifdef HAVE_SIGNAL_H
#include <signal.h>
#endif
#include "gdb_signals.h"
struct gdbarch;
/* Always use __SIGRTMIN if it's available. SIGRTMIN is the lowest
_available_ realtime signal, not the lowest supported; glibc takes
several for its own use. */
#if defined(__SIGRTMIN)
# define REALTIME_LO __SIGRTMIN
# define REALTIME_HI (__SIGRTMAX + 1)
#elif defined(SIGRTMIN)
# define REALTIME_LO SIGRTMIN
# define REALTIME_HI (SIGRTMAX + 1)
#endif
/* This table must match in order and size the signals in enum
gdb_signal. */
static const struct {
const char *symbol;
const char *name;
const char *string;
} signals [] =
{
#define SET(symbol, constant, name, string) { #symbol, name, string },
#include "gdb/signals.def"
#undef SET
};
const char *
gdb_signal_to_symbol_string (enum gdb_signal sig)
{
gdb_assert ((int) sig >= GDB_SIGNAL_FIRST && (int) sig <= GDB_SIGNAL_LAST);
return signals[sig].symbol;
}
/* Return the string for a signal. */
const char *
gdb_signal_to_string (enum gdb_signal sig)
{
if ((int) sig >= GDB_SIGNAL_FIRST && (int) sig <= GDB_SIGNAL_LAST)
return signals[sig].string;
else
return signals[GDB_SIGNAL_UNKNOWN].string;
}
/* Return the name for a signal. */
const char *
gdb_signal_to_name (enum gdb_signal sig)
{
if ((int) sig >= GDB_SIGNAL_FIRST && (int) sig <= GDB_SIGNAL_LAST
&& signals[sig].name != NULL)
return signals[sig].name;
else
/* I think the code which prints this will always print it along
with the string, so no need to be verbose (very old comment). */
return "?";
}
/* Given a name, return its signal. */
enum gdb_signal
gdb_signal_from_name (const char *name)
{
enum gdb_signal sig;
/* It's possible we also should allow "SIGCLD" as well as "SIGCHLD"
for GDB_SIGNAL_SIGCHLD. SIGIOT, on the other hand, is more
questionable; seems like by now people should call it SIGABRT
instead. */
/* This ugly cast brought to you by the native VAX compiler. */
for (sig = GDB_SIGNAL_HUP;
sig < GDB_SIGNAL_LAST;
sig = (enum gdb_signal) ((int) sig + 1))
if (signals[sig].name != NULL
&& strcmp (name, signals[sig].name) == 0)
return sig;
return GDB_SIGNAL_UNKNOWN;
}
/* The following functions are to help certain targets deal
with the signal/waitstatus stuff. They could just as well be in
a file called native-utils.c or unixwaitstatus-utils.c or whatever. */
/* Convert host signal to our signals. */
enum gdb_signal
gdb_signal_from_host (int hostsig)
{
/* A switch statement would make sense but would require special
kludges to deal with the cases where more than one signal has the
same number. Signals are ordered ANSI-standard signals first,
other signals second, with signals in each block ordered by their
numerical values on a typical POSIX platform. */
if (hostsig == 0)
return GDB_SIGNAL_0;
/* SIGINT, SIGILL, SIGABRT, SIGFPE, SIGSEGV and SIGTERM
are ANSI-standard signals and are always available. */
if (hostsig == SIGINT)
return GDB_SIGNAL_INT;
if (hostsig == SIGILL)
return GDB_SIGNAL_ILL;
if (hostsig == SIGABRT)
return GDB_SIGNAL_ABRT;
if (hostsig == SIGFPE)
return GDB_SIGNAL_FPE;
if (hostsig == SIGSEGV)
return GDB_SIGNAL_SEGV;
if (hostsig == SIGTERM)
return GDB_SIGNAL_TERM;
/* All other signals need preprocessor conditionals. */
#if defined (SIGHUP)
if (hostsig == SIGHUP)
return GDB_SIGNAL_HUP;
#endif
#if defined (SIGQUIT)
if (hostsig == SIGQUIT)
return GDB_SIGNAL_QUIT;
#endif
#if defined (SIGTRAP)
if (hostsig == SIGTRAP)
return GDB_SIGNAL_TRAP;
#endif
#if defined (SIGEMT)
if (hostsig == SIGEMT)
return GDB_SIGNAL_EMT;
#endif
#if defined (SIGKILL)
if (hostsig == SIGKILL)
return GDB_SIGNAL_KILL;
#endif
#if defined (SIGBUS)
if (hostsig == SIGBUS)
return GDB_SIGNAL_BUS;
#endif
#if defined (SIGSYS)
if (hostsig == SIGSYS)
return GDB_SIGNAL_SYS;
#endif
#if defined (SIGPIPE)
if (hostsig == SIGPIPE)
return GDB_SIGNAL_PIPE;
#endif
#if defined (SIGALRM)
if (hostsig == SIGALRM)
return GDB_SIGNAL_ALRM;
#endif
#if defined (SIGUSR1)
if (hostsig == SIGUSR1)
return GDB_SIGNAL_USR1;
#endif
#if defined (SIGUSR2)
if (hostsig == SIGUSR2)
return GDB_SIGNAL_USR2;
#endif
#if defined (SIGCLD)
if (hostsig == SIGCLD)
return GDB_SIGNAL_CHLD;
#endif
#if defined (SIGCHLD)
if (hostsig == SIGCHLD)
return GDB_SIGNAL_CHLD;
#endif
#if defined (SIGPWR)
if (hostsig == SIGPWR)
return GDB_SIGNAL_PWR;
#endif
#if defined (SIGWINCH)
if (hostsig == SIGWINCH)
return GDB_SIGNAL_WINCH;
#endif
#if defined (SIGURG)
if (hostsig == SIGURG)
return GDB_SIGNAL_URG;
#endif
#if defined (SIGIO)
if (hostsig == SIGIO)
return GDB_SIGNAL_IO;
#endif
#if defined (SIGPOLL)
if (hostsig == SIGPOLL)
return GDB_SIGNAL_POLL;
#endif
#if defined (SIGSTOP)
if (hostsig == SIGSTOP)
return GDB_SIGNAL_STOP;
#endif
#if defined (SIGTSTP)
if (hostsig == SIGTSTP)
return GDB_SIGNAL_TSTP;
#endif
#if defined (SIGCONT)
if (hostsig == SIGCONT)
return GDB_SIGNAL_CONT;
#endif
#if defined (SIGTTIN)
if (hostsig == SIGTTIN)
return GDB_SIGNAL_TTIN;
#endif
#if defined (SIGTTOU)
if (hostsig == SIGTTOU)
return GDB_SIGNAL_TTOU;
#endif
#if defined (SIGVTALRM)
if (hostsig == SIGVTALRM)
return GDB_SIGNAL_VTALRM;
#endif
#if defined (SIGPROF)
if (hostsig == SIGPROF)
return GDB_SIGNAL_PROF;
#endif
#if defined (SIGXCPU)
if (hostsig == SIGXCPU)
return GDB_SIGNAL_XCPU;
#endif
#if defined (SIGXFSZ)
if (hostsig == SIGXFSZ)
return GDB_SIGNAL_XFSZ;
#endif
#if defined (SIGWIND)
if (hostsig == SIGWIND)
return GDB_SIGNAL_WIND;
#endif
#if defined (SIGPHONE)
if (hostsig == SIGPHONE)
return GDB_SIGNAL_PHONE;
#endif
#if defined (SIGLOST)
if (hostsig == SIGLOST)
return GDB_SIGNAL_LOST;
#endif
#if defined (SIGWAITING)
if (hostsig == SIGWAITING)
return GDB_SIGNAL_WAITING;
#endif
#if defined (SIGCANCEL)
if (hostsig == SIGCANCEL)
return GDB_SIGNAL_CANCEL;
#endif
#if defined (SIGLWP)
if (hostsig == SIGLWP)
return GDB_SIGNAL_LWP;
#endif
#if defined (SIGDANGER)
if (hostsig == SIGDANGER)
return GDB_SIGNAL_DANGER;
#endif
#if defined (SIGGRANT)
if (hostsig == SIGGRANT)
return GDB_SIGNAL_GRANT;
#endif
#if defined (SIGRETRACT)
if (hostsig == SIGRETRACT)
return GDB_SIGNAL_RETRACT;
#endif
#if defined (SIGMSG)
if (hostsig == SIGMSG)
return GDB_SIGNAL_MSG;
#endif
#if defined (SIGSOUND)
if (hostsig == SIGSOUND)
return GDB_SIGNAL_SOUND;
#endif
#if defined (SIGSAK)
if (hostsig == SIGSAK)
return GDB_SIGNAL_SAK;
#endif
#if defined (SIGPRIO)
if (hostsig == SIGPRIO)
return GDB_SIGNAL_PRIO;
#endif
/* Mach exceptions. Assumes that the values for EXC_ are positive! */
#if defined (EXC_BAD_ACCESS) && defined (_NSIG)
if (hostsig == _NSIG + EXC_BAD_ACCESS)
return GDB_EXC_BAD_ACCESS;
#endif
#if defined (EXC_BAD_INSTRUCTION) && defined (_NSIG)
if (hostsig == _NSIG + EXC_BAD_INSTRUCTION)
return GDB_EXC_BAD_INSTRUCTION;
#endif
#if defined (EXC_ARITHMETIC) && defined (_NSIG)
if (hostsig == _NSIG + EXC_ARITHMETIC)
return GDB_EXC_ARITHMETIC;
#endif
#if defined (EXC_EMULATION) && defined (_NSIG)
if (hostsig == _NSIG + EXC_EMULATION)
return GDB_EXC_EMULATION;
#endif
#if defined (EXC_SOFTWARE) && defined (_NSIG)
if (hostsig == _NSIG + EXC_SOFTWARE)
return GDB_EXC_SOFTWARE;
#endif
#if defined (EXC_BREAKPOINT) && defined (_NSIG)
if (hostsig == _NSIG + EXC_BREAKPOINT)
return GDB_EXC_BREAKPOINT;
#endif
#if defined (SIGINFO)
if (hostsig == SIGINFO)
return GDB_SIGNAL_INFO;
#endif
#if defined (SIGLIBRT)
if (hostsig == SIGLIBRT)
return GDB_SIGNAL_LIBRT;
#endif
#if defined (REALTIME_LO)
if (hostsig >= REALTIME_LO && hostsig < REALTIME_HI)
{
/* This block of GDB_SIGNAL_REALTIME value is in order. */
if (33 <= hostsig && hostsig <= 63)
return (enum gdb_signal)
(hostsig - 33 + (int) GDB_SIGNAL_REALTIME_33);
else if (hostsig == 32)
return GDB_SIGNAL_REALTIME_32;
else if (64 <= hostsig && hostsig <= 127)
return (enum gdb_signal)
(hostsig - 64 + (int) GDB_SIGNAL_REALTIME_64);
else
error (_("GDB bug: target.c (gdb_signal_from_host): "
"unrecognized real-time signal"));
}
#endif
return GDB_SIGNAL_UNKNOWN;
}
/* Convert a OURSIG (an enum gdb_signal) to the form used by the
target operating system (referred to as the ``host'') or zero if the
equivalent host signal is not available. Set/clear OURSIG_OK
accordingly. */
static int
do_gdb_signal_to_host (enum gdb_signal oursig,
int *oursig_ok)
{
int retsig;
/* Silence the 'not used' warning, for targets that
do not support signals. */
(void) retsig;
/* Signals are ordered ANSI-standard signals first, other signals
second, with signals in each block ordered by their numerical
values on a typical POSIX platform. */
*oursig_ok = 1;
switch (oursig)
{
case GDB_SIGNAL_0:
return 0;
/* SIGINT, SIGILL, SIGABRT, SIGFPE, SIGSEGV and SIGTERM
are ANSI-standard signals and are always available. */
case GDB_SIGNAL_INT:
return SIGINT;
case GDB_SIGNAL_ILL:
return SIGILL;
case GDB_SIGNAL_ABRT:
return SIGABRT;
case GDB_SIGNAL_FPE:
return SIGFPE;
case GDB_SIGNAL_SEGV:
return SIGSEGV;
case GDB_SIGNAL_TERM:
return SIGTERM;
/* All other signals need preprocessor conditionals. */
#if defined (SIGHUP)
case GDB_SIGNAL_HUP:
return SIGHUP;
#endif
#if defined (SIGQUIT)
case GDB_SIGNAL_QUIT:
return SIGQUIT;
#endif
#if defined (SIGTRAP)
case GDB_SIGNAL_TRAP:
return SIGTRAP;
#endif
#if defined (SIGEMT)
case GDB_SIGNAL_EMT:
return SIGEMT;
#endif
#if defined (SIGKILL)
case GDB_SIGNAL_KILL:
return SIGKILL;
#endif
#if defined (SIGBUS)
case GDB_SIGNAL_BUS:
return SIGBUS;
#endif
#if defined (SIGSYS)
case GDB_SIGNAL_SYS:
return SIGSYS;
#endif
#if defined (SIGPIPE)
case GDB_SIGNAL_PIPE:
return SIGPIPE;
#endif
#if defined (SIGALRM)
case GDB_SIGNAL_ALRM:
return SIGALRM;
#endif
#if defined (SIGUSR1)
case GDB_SIGNAL_USR1:
return SIGUSR1;
#endif
#if defined (SIGUSR2)
case GDB_SIGNAL_USR2:
return SIGUSR2;
#endif
#if defined (SIGCHLD) || defined (SIGCLD)
case GDB_SIGNAL_CHLD:
#if defined (SIGCHLD)
return SIGCHLD;
#else
return SIGCLD;
#endif
#endif /* SIGCLD or SIGCHLD */
#if defined (SIGPWR)
case GDB_SIGNAL_PWR:
return SIGPWR;
#endif
#if defined (SIGWINCH)
case GDB_SIGNAL_WINCH:
return SIGWINCH;
#endif
#if defined (SIGURG)
case GDB_SIGNAL_URG:
return SIGURG;
#endif
#if defined (SIGIO)
case GDB_SIGNAL_IO:
return SIGIO;
#endif
#if defined (SIGPOLL)
case GDB_SIGNAL_POLL:
return SIGPOLL;
#endif
#if defined (SIGSTOP)
case GDB_SIGNAL_STOP:
return SIGSTOP;
#endif
#if defined (SIGTSTP)
case GDB_SIGNAL_TSTP:
return SIGTSTP;
#endif
#if defined (SIGCONT)
case GDB_SIGNAL_CONT:
return SIGCONT;
#endif
#if defined (SIGTTIN)
case GDB_SIGNAL_TTIN:
return SIGTTIN;
#endif
#if defined (SIGTTOU)
case GDB_SIGNAL_TTOU:
return SIGTTOU;
#endif
#if defined (SIGVTALRM)
case GDB_SIGNAL_VTALRM:
return SIGVTALRM;
#endif
#if defined (SIGPROF)
case GDB_SIGNAL_PROF:
return SIGPROF;
#endif
#if defined (SIGXCPU)
case GDB_SIGNAL_XCPU:
return SIGXCPU;
#endif
#if defined (SIGXFSZ)
case GDB_SIGNAL_XFSZ:
return SIGXFSZ;
#endif
#if defined (SIGWIND)
case GDB_SIGNAL_WIND:
return SIGWIND;
#endif
#if defined (SIGPHONE)
case GDB_SIGNAL_PHONE:
return SIGPHONE;
#endif
#if defined (SIGLOST)
case GDB_SIGNAL_LOST:
return SIGLOST;
#endif
#if defined (SIGWAITING)
case GDB_SIGNAL_WAITING:
return SIGWAITING;
#endif
#if defined (SIGCANCEL)
case GDB_SIGNAL_CANCEL:
return SIGCANCEL;
#endif
#if defined (SIGLWP)
case GDB_SIGNAL_LWP:
return SIGLWP;
#endif
#if defined (SIGDANGER)
case GDB_SIGNAL_DANGER:
return SIGDANGER;
#endif
#if defined (SIGGRANT)
case GDB_SIGNAL_GRANT:
return SIGGRANT;
#endif
#if defined (SIGRETRACT)
case GDB_SIGNAL_RETRACT:
return SIGRETRACT;
#endif
#if defined (SIGMSG)
case GDB_SIGNAL_MSG:
return SIGMSG;
#endif
#if defined (SIGSOUND)
case GDB_SIGNAL_SOUND:
return SIGSOUND;
#endif
#if defined (SIGSAK)
case GDB_SIGNAL_SAK:
return SIGSAK;
#endif
#if defined (SIGPRIO)
case GDB_SIGNAL_PRIO:
return SIGPRIO;
#endif
/* Mach exceptions. Assumes that the values for EXC_ are positive! */
#if defined (EXC_BAD_ACCESS) && defined (_NSIG)
case GDB_EXC_BAD_ACCESS:
return _NSIG + EXC_BAD_ACCESS;
#endif
#if defined (EXC_BAD_INSTRUCTION) && defined (_NSIG)
case GDB_EXC_BAD_INSTRUCTION:
return _NSIG + EXC_BAD_INSTRUCTION;
#endif
#if defined (EXC_ARITHMETIC) && defined (_NSIG)
case GDB_EXC_ARITHMETIC:
return _NSIG + EXC_ARITHMETIC;
#endif
#if defined (EXC_EMULATION) && defined (_NSIG)
case GDB_EXC_EMULATION:
return _NSIG + EXC_EMULATION;
#endif
#if defined (EXC_SOFTWARE) && defined (_NSIG)
case GDB_EXC_SOFTWARE:
return _NSIG + EXC_SOFTWARE;
#endif
#if defined (EXC_BREAKPOINT) && defined (_NSIG)
case GDB_EXC_BREAKPOINT:
return _NSIG + EXC_BREAKPOINT;
#endif
#if defined (SIGINFO)
case GDB_SIGNAL_INFO:
return SIGINFO;
#endif
#if defined (SIGLIBRT)
case GDB_SIGNAL_LIBRT:
return SIGLIBRT;
#endif
default:
#if defined (REALTIME_LO)
retsig = 0;
if (oursig >= GDB_SIGNAL_REALTIME_33
&& oursig <= GDB_SIGNAL_REALTIME_63)
{
/* This block of signals is continuous, and
GDB_SIGNAL_REALTIME_33 is 33 by definition. */
retsig = (int) oursig - (int) GDB_SIGNAL_REALTIME_33 + 33;
}
else if (oursig == GDB_SIGNAL_REALTIME_32)
{
/* GDB_SIGNAL_REALTIME_32 isn't contiguous with
GDB_SIGNAL_REALTIME_33. It is 32 by definition. */
retsig = 32;
}
else if (oursig >= GDB_SIGNAL_REALTIME_64
&& oursig <= GDB_SIGNAL_REALTIME_127)
{
/* This block of signals is continuous, and
GDB_SIGNAL_REALTIME_64 is 64 by definition. */
retsig = (int) oursig - (int) GDB_SIGNAL_REALTIME_64 + 64;
}
if (retsig >= REALTIME_LO && retsig < REALTIME_HI)
return retsig;
#endif
*oursig_ok = 0;
return 0;
}
}
int
gdb_signal_to_host_p (enum gdb_signal oursig)
{
int oursig_ok;
do_gdb_signal_to_host (oursig, &oursig_ok);
return oursig_ok;
}
int
gdb_signal_to_host (enum gdb_signal oursig)
{
int oursig_ok;
int targ_signo = do_gdb_signal_to_host (oursig, &oursig_ok);
if (!oursig_ok)
{
/* The user might be trying to do "signal SIGSAK" where this system
doesn't have SIGSAK. */
warning (_("Signal %s does not exist on this system."),
gdb_signal_to_name (oursig));
return 0;
}
else
return targ_signo;
}
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