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/* Target-dependent code for OpenBSD.
Copyright (C) 2005-2015 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 "frame.h"
#include "symtab.h"
#include "objfiles.h"
#include "obsd-tdep.h"
CORE_ADDR
obsd_skip_solib_resolver (struct gdbarch *gdbarch, CORE_ADDR pc)
{
struct bound_minimal_symbol msym;
msym = lookup_minimal_symbol("_dl_bind", NULL, NULL);
if (msym.minsym && BMSYMBOL_VALUE_ADDRESS (msym) == pc)
return frame_unwind_caller_pc (get_current_frame ());
else
return find_solib_trampoline_target (get_current_frame (), pc);
}
/* OpenBSD signal numbers. From <sys/signal.h>. */
enum
{
OBSD_SIGHUP = 1,
OBSD_SIGINT = 2,
OBSD_SIGQUIT = 3,
OBSD_SIGILL = 4,
OBSD_SIGTRAP = 5,
OBSD_SIGABRT = 6,
OBSD_SIGEMT = 7,
OBSD_SIGFPE = 8,
OBSD_SIGKILL = 9,
OBSD_SIGBUS = 10,
OBSD_SIGSEGV = 11,
OBSD_SIGSYS = 12,
OBSD_SIGPIPE = 13,
OBSD_SIGALRM = 14,
OBSD_SIGTERM = 15,
OBSD_SIGURG = 16,
OBSD_SIGSTOP = 17,
OBSD_SIGTSTP = 18,
OBSD_SIGCONT = 19,
OBSD_SIGCHLD = 20,
OBSD_SIGTTIN = 21,
OBSD_SIGTTOU = 22,
OBSD_SIGIO = 23,
OBSD_SIGXCPU = 24,
OBSD_SIGXFSZ = 25,
OBSD_SIGVTALRM = 26,
OBSD_SIGPROF = 27,
OBSD_SIGWINCH = 28,
OBSD_SIGINFO = 29,
OBSD_SIGUSR1 = 30,
OBSD_SIGUSR2 = 31,
OBSD_SIGTHR = 32,
};
/* Implement the "gdb_signal_from_target" gdbarch method. */
static enum gdb_signal
obsd_gdb_signal_from_target (struct gdbarch *gdbarch, int signal)
{
switch (signal)
{
case 0:
return GDB_SIGNAL_0;
case OBSD_SIGHUP:
return GDB_SIGNAL_HUP;
case OBSD_SIGINT:
return GDB_SIGNAL_INT;
case OBSD_SIGQUIT:
return GDB_SIGNAL_QUIT;
case OBSD_SIGILL:
return GDB_SIGNAL_ILL;
case OBSD_SIGTRAP:
return GDB_SIGNAL_TRAP;
case OBSD_SIGABRT:
return GDB_SIGNAL_ABRT;
case OBSD_SIGEMT:
return GDB_SIGNAL_EMT;
case OBSD_SIGFPE:
return GDB_SIGNAL_FPE;
case OBSD_SIGKILL:
return GDB_SIGNAL_KILL;
case OBSD_SIGBUS:
return GDB_SIGNAL_BUS;
case OBSD_SIGSEGV:
return GDB_SIGNAL_SEGV;
case OBSD_SIGSYS:
return GDB_SIGNAL_SYS;
case OBSD_SIGPIPE:
return GDB_SIGNAL_PIPE;
case OBSD_SIGALRM:
return GDB_SIGNAL_ALRM;
case OBSD_SIGTERM:
return GDB_SIGNAL_TERM;
case OBSD_SIGURG:
return GDB_SIGNAL_URG;
case OBSD_SIGSTOP:
return GDB_SIGNAL_STOP;
case OBSD_SIGTSTP:
return GDB_SIGNAL_TSTP;
case OBSD_SIGCONT:
return GDB_SIGNAL_CONT;
case OBSD_SIGCHLD:
return GDB_SIGNAL_CHLD;
case OBSD_SIGTTIN:
return GDB_SIGNAL_TTIN;
case OBSD_SIGTTOU:
return GDB_SIGNAL_TTOU;
case OBSD_SIGIO:
return GDB_SIGNAL_IO;
case OBSD_SIGXCPU:
return GDB_SIGNAL_XCPU;
case OBSD_SIGXFSZ:
return GDB_SIGNAL_XFSZ;
case OBSD_SIGVTALRM:
return GDB_SIGNAL_VTALRM;
case OBSD_SIGPROF:
return GDB_SIGNAL_PROF;
case OBSD_SIGWINCH:
return GDB_SIGNAL_WINCH;
case OBSD_SIGINFO:
return GDB_SIGNAL_INFO;
case OBSD_SIGUSR1:
return GDB_SIGNAL_USR1;
case OBSD_SIGUSR2:
return GDB_SIGNAL_USR2;
}
return GDB_SIGNAL_UNKNOWN;
}
/* Implement the "gdb_signal_to_target" gdbarch method. */
static int
obsd_gdb_signal_to_target (struct gdbarch *gdbarch,
enum gdb_signal signal)
{
switch (signal)
{
case GDB_SIGNAL_0:
return 0;
case GDB_SIGNAL_HUP:
return OBSD_SIGHUP;
case GDB_SIGNAL_INT:
return OBSD_SIGINT;
case GDB_SIGNAL_QUIT:
return OBSD_SIGQUIT;
case GDB_SIGNAL_ILL:
return OBSD_SIGILL;
case GDB_SIGNAL_TRAP:
return OBSD_SIGTRAP;
case GDB_SIGNAL_ABRT:
return OBSD_SIGABRT;
case GDB_SIGNAL_EMT:
return OBSD_SIGEMT;
case GDB_SIGNAL_FPE:
return OBSD_SIGFPE;
case GDB_SIGNAL_KILL:
return OBSD_SIGKILL;
case GDB_SIGNAL_BUS:
return OBSD_SIGBUS;
case GDB_SIGNAL_SEGV:
return OBSD_SIGSEGV;
case GDB_SIGNAL_SYS:
return OBSD_SIGSYS;
case GDB_SIGNAL_PIPE:
return OBSD_SIGPIPE;
case GDB_SIGNAL_ALRM:
return OBSD_SIGALRM;
case GDB_SIGNAL_TERM:
return OBSD_SIGTERM;
case GDB_SIGNAL_URG:
return OBSD_SIGURG;
case GDB_SIGNAL_STOP:
return OBSD_SIGSTOP;
case GDB_SIGNAL_TSTP:
return OBSD_SIGTSTP;
case GDB_SIGNAL_CONT:
return OBSD_SIGCONT;
case GDB_SIGNAL_CHLD:
return OBSD_SIGCHLD;
case GDB_SIGNAL_TTIN:
return OBSD_SIGTTIN;
case GDB_SIGNAL_TTOU:
return OBSD_SIGTTOU;
case GDB_SIGNAL_IO:
return OBSD_SIGIO;
case GDB_SIGNAL_XCPU:
return OBSD_SIGXCPU;
case GDB_SIGNAL_XFSZ:
return OBSD_SIGXFSZ;
case GDB_SIGNAL_VTALRM:
return OBSD_SIGVTALRM;
case GDB_SIGNAL_PROF:
return OBSD_SIGPROF;
case GDB_SIGNAL_WINCH:
return OBSD_SIGWINCH;
case GDB_SIGNAL_USR1:
return OBSD_SIGUSR1;
case GDB_SIGNAL_USR2:
return OBSD_SIGUSR2;
case GDB_SIGNAL_INFO:
return OBSD_SIGINFO;
}
return -1;
}
static int
obsd_auxv_parse (struct gdbarch *gdbarch, gdb_byte **readptr,
gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp)
{
struct type *int_type = builtin_type (gdbarch)->builtin_int;
struct type *ptr_type = builtin_type (gdbarch)->builtin_data_ptr;
const int sizeof_auxv_type = TYPE_LENGTH (int_type);
const int sizeof_auxv_val = TYPE_LENGTH (ptr_type);
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
gdb_byte *ptr = *readptr;
if (endptr == ptr)
return 0;
if (endptr - ptr < 2 * sizeof_auxv_val)
return -1;
*typep = extract_unsigned_integer (ptr, sizeof_auxv_type, byte_order);
ptr += sizeof_auxv_val; /* Alignment. */
*valp = extract_unsigned_integer (ptr, sizeof_auxv_val, byte_order);
ptr += sizeof_auxv_val;
*readptr = ptr;
return 1;
}
void
obsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
set_gdbarch_gdb_signal_from_target (gdbarch,
obsd_gdb_signal_from_target);
set_gdbarch_gdb_signal_to_target (gdbarch,
obsd_gdb_signal_to_target);
/* Unlike Linux, OpenBSD actually follows the ELF standard. */
set_gdbarch_auxv_parse (gdbarch, obsd_auxv_parse);
}
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