328 lines
6.8 KiB
C
328 lines
6.8 KiB
C
/* Target-dependent code for OpenBSD.
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Copyright (C) 2005-2016 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 "frame.h"
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#include "symtab.h"
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#include "objfiles.h"
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#include "obsd-tdep.h"
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CORE_ADDR
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obsd_skip_solib_resolver (struct gdbarch *gdbarch, CORE_ADDR pc)
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{
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struct bound_minimal_symbol msym;
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msym = lookup_minimal_symbol("_dl_bind", NULL, NULL);
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if (msym.minsym && BMSYMBOL_VALUE_ADDRESS (msym) == pc)
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return frame_unwind_caller_pc (get_current_frame ());
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else
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return find_solib_trampoline_target (get_current_frame (), pc);
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}
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/* OpenBSD signal numbers. From <sys/signal.h>. */
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enum
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{
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OBSD_SIGHUP = 1,
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OBSD_SIGINT = 2,
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OBSD_SIGQUIT = 3,
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OBSD_SIGILL = 4,
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OBSD_SIGTRAP = 5,
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OBSD_SIGABRT = 6,
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OBSD_SIGEMT = 7,
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OBSD_SIGFPE = 8,
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OBSD_SIGKILL = 9,
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OBSD_SIGBUS = 10,
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OBSD_SIGSEGV = 11,
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OBSD_SIGSYS = 12,
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OBSD_SIGPIPE = 13,
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OBSD_SIGALRM = 14,
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OBSD_SIGTERM = 15,
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OBSD_SIGURG = 16,
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OBSD_SIGSTOP = 17,
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OBSD_SIGTSTP = 18,
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OBSD_SIGCONT = 19,
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OBSD_SIGCHLD = 20,
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OBSD_SIGTTIN = 21,
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OBSD_SIGTTOU = 22,
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OBSD_SIGIO = 23,
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OBSD_SIGXCPU = 24,
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OBSD_SIGXFSZ = 25,
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OBSD_SIGVTALRM = 26,
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OBSD_SIGPROF = 27,
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OBSD_SIGWINCH = 28,
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OBSD_SIGINFO = 29,
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OBSD_SIGUSR1 = 30,
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OBSD_SIGUSR2 = 31,
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OBSD_SIGTHR = 32,
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};
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/* Implement the "gdb_signal_from_target" gdbarch method. */
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static enum gdb_signal
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obsd_gdb_signal_from_target (struct gdbarch *gdbarch, int signal)
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{
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switch (signal)
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{
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case 0:
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return GDB_SIGNAL_0;
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case OBSD_SIGHUP:
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return GDB_SIGNAL_HUP;
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case OBSD_SIGINT:
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return GDB_SIGNAL_INT;
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case OBSD_SIGQUIT:
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return GDB_SIGNAL_QUIT;
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case OBSD_SIGILL:
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return GDB_SIGNAL_ILL;
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case OBSD_SIGTRAP:
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return GDB_SIGNAL_TRAP;
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case OBSD_SIGABRT:
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return GDB_SIGNAL_ABRT;
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case OBSD_SIGEMT:
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return GDB_SIGNAL_EMT;
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case OBSD_SIGFPE:
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return GDB_SIGNAL_FPE;
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case OBSD_SIGKILL:
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return GDB_SIGNAL_KILL;
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case OBSD_SIGBUS:
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return GDB_SIGNAL_BUS;
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case OBSD_SIGSEGV:
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return GDB_SIGNAL_SEGV;
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case OBSD_SIGSYS:
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return GDB_SIGNAL_SYS;
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case OBSD_SIGPIPE:
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return GDB_SIGNAL_PIPE;
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case OBSD_SIGALRM:
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return GDB_SIGNAL_ALRM;
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case OBSD_SIGTERM:
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return GDB_SIGNAL_TERM;
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case OBSD_SIGURG:
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return GDB_SIGNAL_URG;
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case OBSD_SIGSTOP:
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return GDB_SIGNAL_STOP;
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case OBSD_SIGTSTP:
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return GDB_SIGNAL_TSTP;
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case OBSD_SIGCONT:
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return GDB_SIGNAL_CONT;
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case OBSD_SIGCHLD:
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return GDB_SIGNAL_CHLD;
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case OBSD_SIGTTIN:
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return GDB_SIGNAL_TTIN;
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case OBSD_SIGTTOU:
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return GDB_SIGNAL_TTOU;
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case OBSD_SIGIO:
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return GDB_SIGNAL_IO;
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case OBSD_SIGXCPU:
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return GDB_SIGNAL_XCPU;
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case OBSD_SIGXFSZ:
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return GDB_SIGNAL_XFSZ;
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case OBSD_SIGVTALRM:
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return GDB_SIGNAL_VTALRM;
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case OBSD_SIGPROF:
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return GDB_SIGNAL_PROF;
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case OBSD_SIGWINCH:
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return GDB_SIGNAL_WINCH;
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case OBSD_SIGINFO:
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return GDB_SIGNAL_INFO;
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case OBSD_SIGUSR1:
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return GDB_SIGNAL_USR1;
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case OBSD_SIGUSR2:
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return GDB_SIGNAL_USR2;
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}
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return GDB_SIGNAL_UNKNOWN;
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}
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/* Implement the "gdb_signal_to_target" gdbarch method. */
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static int
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obsd_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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case GDB_SIGNAL_0:
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return 0;
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case GDB_SIGNAL_HUP:
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return OBSD_SIGHUP;
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case GDB_SIGNAL_INT:
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return OBSD_SIGINT;
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case GDB_SIGNAL_QUIT:
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return OBSD_SIGQUIT;
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case GDB_SIGNAL_ILL:
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return OBSD_SIGILL;
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case GDB_SIGNAL_TRAP:
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return OBSD_SIGTRAP;
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case GDB_SIGNAL_ABRT:
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return OBSD_SIGABRT;
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case GDB_SIGNAL_EMT:
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return OBSD_SIGEMT;
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case GDB_SIGNAL_FPE:
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return OBSD_SIGFPE;
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case GDB_SIGNAL_KILL:
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return OBSD_SIGKILL;
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case GDB_SIGNAL_BUS:
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return OBSD_SIGBUS;
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case GDB_SIGNAL_SEGV:
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return OBSD_SIGSEGV;
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case GDB_SIGNAL_SYS:
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return OBSD_SIGSYS;
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case GDB_SIGNAL_PIPE:
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return OBSD_SIGPIPE;
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case GDB_SIGNAL_ALRM:
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return OBSD_SIGALRM;
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case GDB_SIGNAL_TERM:
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return OBSD_SIGTERM;
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case GDB_SIGNAL_URG:
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return OBSD_SIGURG;
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case GDB_SIGNAL_STOP:
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return OBSD_SIGSTOP;
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case GDB_SIGNAL_TSTP:
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return OBSD_SIGTSTP;
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case GDB_SIGNAL_CONT:
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return OBSD_SIGCONT;
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case GDB_SIGNAL_CHLD:
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return OBSD_SIGCHLD;
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case GDB_SIGNAL_TTIN:
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return OBSD_SIGTTIN;
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case GDB_SIGNAL_TTOU:
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return OBSD_SIGTTOU;
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case GDB_SIGNAL_IO:
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return OBSD_SIGIO;
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case GDB_SIGNAL_XCPU:
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return OBSD_SIGXCPU;
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case GDB_SIGNAL_XFSZ:
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return OBSD_SIGXFSZ;
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case GDB_SIGNAL_VTALRM:
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return OBSD_SIGVTALRM;
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case GDB_SIGNAL_PROF:
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return OBSD_SIGPROF;
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case GDB_SIGNAL_WINCH:
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return OBSD_SIGWINCH;
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case GDB_SIGNAL_USR1:
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return OBSD_SIGUSR1;
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case GDB_SIGNAL_USR2:
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return OBSD_SIGUSR2;
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case GDB_SIGNAL_INFO:
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return OBSD_SIGINFO;
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}
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return -1;
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}
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static int
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obsd_auxv_parse (struct gdbarch *gdbarch, gdb_byte **readptr,
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gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp)
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{
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struct type *int_type = builtin_type (gdbarch)->builtin_int;
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struct type *ptr_type = builtin_type (gdbarch)->builtin_data_ptr;
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const int sizeof_auxv_type = TYPE_LENGTH (int_type);
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const int sizeof_auxv_val = TYPE_LENGTH (ptr_type);
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enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
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gdb_byte *ptr = *readptr;
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if (endptr == ptr)
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return 0;
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if (endptr - ptr < 2 * sizeof_auxv_val)
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return -1;
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*typep = extract_unsigned_integer (ptr, sizeof_auxv_type, byte_order);
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ptr += sizeof_auxv_val; /* Alignment. */
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*valp = extract_unsigned_integer (ptr, sizeof_auxv_val, byte_order);
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ptr += sizeof_auxv_val;
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*readptr = ptr;
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return 1;
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}
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void
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obsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
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{
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set_gdbarch_gdb_signal_from_target (gdbarch,
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obsd_gdb_signal_from_target);
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set_gdbarch_gdb_signal_to_target (gdbarch,
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obsd_gdb_signal_to_target);
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/* Unlike Linux, OpenBSD actually follows the ELF standard. */
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set_gdbarch_auxv_parse (gdbarch, obsd_auxv_parse);
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}
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