/* Common target-dependent code for NetBSD systems.
- Copyright 2002 Free Software Foundation, Inc.
+
+ Copyright (C) 2002-2020 Free Software Foundation, Inc.
+
Contributed by Wasabi Systems, 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 2 of the License, or
+ 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, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
+#include "auxv.h"
#include "solib-svr4.h"
+#include "nbsd-tdep.h"
+#include "gdbarch.h"
+#include "objfiles.h"
+#include "xml-syscall.h"
-/* Fetch (and possibly build) an appropriate link_map_offsets
- structure for NetBSD/sh targets using the struct offsets
- defined in <link.h> (but without actual reference to that file).
-
- This makes it possible to access NetBSD/sh shared libraries
- from a GDB that was not built on a NetBSD/sh host (for cross
- debugging).
+/* Flags in the 'kve_protection' field in struct kinfo_vmentry. These
+ match the KVME_PROT_* constants in <sys/sysctl.h>. */
+
+#define KINFO_VME_PROT_READ 0x00000001
+#define KINFO_VME_PROT_WRITE 0x00000002
+#define KINFO_VME_PROT_EXEC 0x00000004
+
+/* Flags in the 'kve_flags' field in struct kinfo_vmentry. These
+ match the KVME_FLAG_* constants in <sys/sysctl.h>. */
+
+#define KINFO_VME_FLAG_COW 0x00000001
+#define KINFO_VME_FLAG_NEEDS_COPY 0x00000002
+#define KINFO_VME_FLAG_NOCOREDUMP 0x00000004
+#define KINFO_VME_FLAG_PAGEABLE 0x00000008
+#define KINFO_VME_FLAG_GROWS_UP 0x00000010
+#define KINFO_VME_FLAG_GROWS_DOWN 0x00000020
+
+/* FIXME: kettenis/20060115: We should really eliminate the next two
+ functions completely. */
- We provide versions for ILP32 and LP64 NetBSD targets here. */
-
struct link_map_offsets *
nbsd_ilp32_solib_svr4_fetch_link_map_offsets (void)
{
- static struct link_map_offsets lmo;
- static struct link_map_offsets *lmp = NULL;
+ return svr4_ilp32_fetch_link_map_offsets ();
+}
+
+struct link_map_offsets *
+nbsd_lp64_solib_svr4_fetch_link_map_offsets (void)
+{
+ return svr4_lp64_fetch_link_map_offsets ();
+}
+
+int
+nbsd_pc_in_sigtramp (CORE_ADDR pc, const char *func_name)
+{
+ /* Check for libc-provided signal trampoline. All such trampolines
+ have function names which begin with "__sigtramp". */
+
+ return (func_name != NULL
+ && startswith (func_name, "__sigtramp"));
+}
+
+/* This enum is derived from NETBSD's <sys/signal.h>. */
+
+enum
+ {
+ NBSD_SIGHUP = 1,
+ NBSD_SIGINT = 2,
+ NBSD_SIGQUIT = 3,
+ NBSD_SIGILL = 4,
+ NBSD_SIGTRAP = 5,
+ NBSD_SIGABRT = 6,
+ NBSD_SIGEMT = 7,
+ NBSD_SIGFPE = 8,
+ NBSD_SIGKILL = 9,
+ NBSD_SIGBUS = 10,
+ NBSD_SIGSEGV = 11,
+ NBSD_SIGSYS = 12,
+ NBSD_SIGPIPE = 13,
+ NBSD_SIGALRM = 14,
+ NBSD_SIGTERM = 15,
+ NBSD_SIGURG = 16,
+ NBSD_SIGSTOP = 17,
+ NBSD_SIGTSTP = 18,
+ NBSD_SIGCONT = 19,
+ NBSD_SIGCHLD = 20,
+ NBSD_SIGTTIN = 21,
+ NBSD_SIGTTOU = 22,
+ NBSD_SIGIO = 23,
+ NBSD_SIGXCPU = 24,
+ NBSD_SIGXFSZ = 25,
+ NBSD_SIGVTALRM = 26,
+ NBSD_SIGPROF = 27,
+ NBSD_SIGWINCH = 28,
+ NBSD_SIGINFO = 29,
+ NBSD_SIGUSR1 = 30,
+ NBSD_SIGUSR2 = 31,
+ NBSD_SIGPWR = 32,
+ NBSD_SIGRTMIN = 33,
+ NBSD_SIGRTMAX = 63,
+ };
+
+/* Implement the "gdb_signal_from_target" gdbarch method. */
- if (lmp == NULL)
+static enum gdb_signal
+nbsd_gdb_signal_from_target (struct gdbarch *gdbarch, int signal)
+{
+ switch (signal)
{
- lmp = &lmo;
+ case 0:
+ return GDB_SIGNAL_0;
+
+ case NBSD_SIGHUP:
+ return GDB_SIGNAL_HUP;
+
+ case NBSD_SIGINT:
+ return GDB_SIGNAL_INT;
+
+ case NBSD_SIGQUIT:
+ return GDB_SIGNAL_QUIT;
+
+ case NBSD_SIGILL:
+ return GDB_SIGNAL_ILL;
+
+ case NBSD_SIGTRAP:
+ return GDB_SIGNAL_TRAP;
+
+ case NBSD_SIGABRT:
+ return GDB_SIGNAL_ABRT;
+
+ case NBSD_SIGEMT:
+ return GDB_SIGNAL_EMT;
- lmo.r_debug_size = 16;
+ case NBSD_SIGFPE:
+ return GDB_SIGNAL_FPE;
- lmo.r_map_offset = 4;
- lmo.r_map_size = 4;
+ case NBSD_SIGKILL:
+ return GDB_SIGNAL_KILL;
- lmo.link_map_size = 20;
+ case NBSD_SIGBUS:
+ return GDB_SIGNAL_BUS;
- lmo.l_addr_offset = 0;
- lmo.l_addr_size = 4;
+ case NBSD_SIGSEGV:
+ return GDB_SIGNAL_SEGV;
- lmo.l_name_offset = 4;
- lmo.l_name_size = 4;
+ case NBSD_SIGSYS:
+ return GDB_SIGNAL_SYS;
- lmo.l_next_offset = 12;
- lmo.l_next_size = 4;
+ case NBSD_SIGPIPE:
+ return GDB_SIGNAL_PIPE;
- lmo.l_prev_offset = 16;
- lmo.l_prev_size = 4;
+ case NBSD_SIGALRM:
+ return GDB_SIGNAL_ALRM;
+
+ case NBSD_SIGTERM:
+ return GDB_SIGNAL_TERM;
+
+ case NBSD_SIGURG:
+ return GDB_SIGNAL_URG;
+
+ case NBSD_SIGSTOP:
+ return GDB_SIGNAL_STOP;
+
+ case NBSD_SIGTSTP:
+ return GDB_SIGNAL_TSTP;
+
+ case NBSD_SIGCONT:
+ return GDB_SIGNAL_CONT;
+
+ case NBSD_SIGCHLD:
+ return GDB_SIGNAL_CHLD;
+
+ case NBSD_SIGTTIN:
+ return GDB_SIGNAL_TTIN;
+
+ case NBSD_SIGTTOU:
+ return GDB_SIGNAL_TTOU;
+
+ case NBSD_SIGIO:
+ return GDB_SIGNAL_IO;
+
+ case NBSD_SIGXCPU:
+ return GDB_SIGNAL_XCPU;
+
+ case NBSD_SIGXFSZ:
+ return GDB_SIGNAL_XFSZ;
+
+ case NBSD_SIGVTALRM:
+ return GDB_SIGNAL_VTALRM;
+
+ case NBSD_SIGPROF:
+ return GDB_SIGNAL_PROF;
+
+ case NBSD_SIGWINCH:
+ return GDB_SIGNAL_WINCH;
+
+ case NBSD_SIGINFO:
+ return GDB_SIGNAL_INFO;
+
+ case NBSD_SIGUSR1:
+ return GDB_SIGNAL_USR1;
+
+ case NBSD_SIGUSR2:
+ return GDB_SIGNAL_USR2;
+
+ case NBSD_SIGPWR:
+ return GDB_SIGNAL_PWR;
+
+ /* SIGRTMIN and SIGRTMAX are not continuous in <gdb/signals.def>,
+ therefore we have to handle them here. */
+ case NBSD_SIGRTMIN:
+ return GDB_SIGNAL_REALTIME_33;
+
+ case NBSD_SIGRTMAX:
+ return GDB_SIGNAL_REALTIME_63;
+ }
+
+ if (signal >= NBSD_SIGRTMIN + 1 && signal <= NBSD_SIGRTMAX - 1)
+ {
+ int offset = signal - NBSD_SIGRTMIN + 1;
+
+ return (enum gdb_signal) ((int) GDB_SIGNAL_REALTIME_34 + offset);
}
- return lmp;
+ return GDB_SIGNAL_UNKNOWN;
}
-struct link_map_offsets *
-nbsd_lp64_solib_svr4_fetch_link_map_offsets (void)
+/* Implement the "gdb_signal_to_target" gdbarch method. */
+
+static int
+nbsd_gdb_signal_to_target (struct gdbarch *gdbarch,
+ enum gdb_signal signal)
{
- static struct link_map_offsets lmo;
- static struct link_map_offsets *lmp = NULL;
+ switch (signal)
+ {
+ case GDB_SIGNAL_0:
+ return 0;
+
+ case GDB_SIGNAL_HUP:
+ return NBSD_SIGHUP;
+
+ case GDB_SIGNAL_INT:
+ return NBSD_SIGINT;
+
+ case GDB_SIGNAL_QUIT:
+ return NBSD_SIGQUIT;
- if (lmp == NULL)
+ case GDB_SIGNAL_ILL:
+ return NBSD_SIGILL;
+
+ case GDB_SIGNAL_TRAP:
+ return NBSD_SIGTRAP;
+
+ case GDB_SIGNAL_ABRT:
+ return NBSD_SIGABRT;
+
+ case GDB_SIGNAL_EMT:
+ return NBSD_SIGEMT;
+
+ case GDB_SIGNAL_FPE:
+ return NBSD_SIGFPE;
+
+ case GDB_SIGNAL_KILL:
+ return NBSD_SIGKILL;
+
+ case GDB_SIGNAL_BUS:
+ return NBSD_SIGBUS;
+
+ case GDB_SIGNAL_SEGV:
+ return NBSD_SIGSEGV;
+
+ case GDB_SIGNAL_SYS:
+ return NBSD_SIGSYS;
+
+ case GDB_SIGNAL_PIPE:
+ return NBSD_SIGPIPE;
+
+ case GDB_SIGNAL_ALRM:
+ return NBSD_SIGALRM;
+
+ case GDB_SIGNAL_TERM:
+ return NBSD_SIGTERM;
+
+ case GDB_SIGNAL_URG:
+ return NBSD_SIGSTOP;
+
+ case GDB_SIGNAL_TSTP:
+ return NBSD_SIGTSTP;
+
+ case GDB_SIGNAL_CONT:
+ return NBSD_SIGCONT;
+
+ case GDB_SIGNAL_CHLD:
+ return NBSD_SIGCHLD;
+
+ case GDB_SIGNAL_TTIN:
+ return NBSD_SIGTTIN;
+
+ case GDB_SIGNAL_TTOU:
+ return NBSD_SIGTTOU;
+
+ case GDB_SIGNAL_IO:
+ return NBSD_SIGIO;
+
+ case GDB_SIGNAL_XCPU:
+ return NBSD_SIGXCPU;
+
+ case GDB_SIGNAL_XFSZ:
+ return NBSD_SIGXFSZ;
+
+ case GDB_SIGNAL_VTALRM:
+ return NBSD_SIGVTALRM;
+
+ case GDB_SIGNAL_PROF:
+ return NBSD_SIGPROF;
+
+ case GDB_SIGNAL_WINCH:
+ return NBSD_SIGWINCH;
+
+ case GDB_SIGNAL_INFO:
+ return NBSD_SIGINFO;
+
+ case GDB_SIGNAL_USR1:
+ return NBSD_SIGUSR1;
+
+ case GDB_SIGNAL_USR2:
+ return NBSD_SIGUSR2;
+
+ case GDB_SIGNAL_PWR:
+ return NBSD_SIGPWR;
+
+ /* GDB_SIGNAL_REALTIME_33 is not continuous in <gdb/signals.def>,
+ therefore we have to handle it here. */
+ case GDB_SIGNAL_REALTIME_33:
+ return NBSD_SIGRTMIN;
+
+ /* Same comment applies to _64. */
+ case GDB_SIGNAL_REALTIME_63:
+ return NBSD_SIGRTMAX;
+ }
+
+ if (signal >= GDB_SIGNAL_REALTIME_34
+ && signal <= GDB_SIGNAL_REALTIME_62)
{
- lmp = &lmo;
+ int offset = signal - GDB_SIGNAL_REALTIME_32;
- lmo.r_debug_size = 32;
+ return NBSD_SIGRTMIN + 1 + offset;
+ }
- lmo.r_map_offset = 8;
- lmo.r_map_size = 8;
+ return -1;
+}
- lmo.link_map_size = 40;
+/* Shared library resolver handling. */
- lmo.l_addr_offset = 0;
- lmo.l_addr_size = 8;
+static CORE_ADDR
+nbsd_skip_solib_resolver (struct gdbarch *gdbarch, CORE_ADDR pc)
+{
+ struct bound_minimal_symbol msym;
- lmo.l_name_offset = 8;
- lmo.l_name_size = 8;
+ msym = lookup_minimal_symbol ("_rtld_bind_start", 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);
+}
- lmo.l_next_offset = 24;
- lmo.l_next_size = 8;
+/* See nbsd-tdep.h. */
- lmo.l_prev_offset = 32;
- lmo.l_prev_size = 8;
+void
+nbsd_info_proc_mappings_header (int addr_bit)
+{
+ printf_filtered (_("Mapped address spaces:\n\n"));
+ if (addr_bit == 64)
+ {
+ printf_filtered (" %18s %18s %10s %10s %9s %s\n",
+ "Start Addr",
+ " End Addr",
+ " Size", " Offset", "Flags ", "File");
+ }
+ else
+ {
+ printf_filtered ("\t%10s %10s %10s %10s %9s %s\n",
+ "Start Addr",
+ " End Addr",
+ " Size", " Offset", "Flags ", "File");
}
+}
+
+/* Helper function to generate mappings flags for a single VM map
+ entry in 'info proc mappings'. */
+
+static const char *
+nbsd_vm_map_entry_flags (int kve_flags, int kve_protection)
+{
+ static char vm_flags[9];
+
+ vm_flags[0] = (kve_protection & KINFO_VME_PROT_READ) ? 'r' : '-';
+ vm_flags[1] = (kve_protection & KINFO_VME_PROT_WRITE) ? 'w' : '-';
+ vm_flags[2] = (kve_protection & KINFO_VME_PROT_EXEC) ? 'x' : '-';
+ vm_flags[3] = ' ';
+ vm_flags[4] = (kve_flags & KINFO_VME_FLAG_COW) ? 'C' : '-';
+ vm_flags[5] = (kve_flags & KINFO_VME_FLAG_NEEDS_COPY) ? 'N' : '-';
+ vm_flags[6] = (kve_flags & KINFO_VME_FLAG_PAGEABLE) ? 'P' : '-';
+ vm_flags[7] = (kve_flags & KINFO_VME_FLAG_GROWS_UP) ? 'U'
+ : (kve_flags & KINFO_VME_FLAG_GROWS_DOWN) ? 'D' : '-';
+ vm_flags[8] = '\0';
+
+ return vm_flags;
+}
+
+void
+nbsd_info_proc_mappings_entry (int addr_bit, ULONGEST kve_start,
+ ULONGEST kve_end, ULONGEST kve_offset,
+ int kve_flags, int kve_protection,
+ const char *kve_path)
+{
+ if (addr_bit == 64)
+ {
+ printf_filtered (" %18s %18s %10s %10s %9s %s\n",
+ hex_string (kve_start),
+ hex_string (kve_end),
+ hex_string (kve_end - kve_start),
+ hex_string (kve_offset),
+ nbsd_vm_map_entry_flags (kve_flags, kve_protection),
+ kve_path);
+ }
+ else
+ {
+ printf_filtered ("\t%10s %10s %10s %10s %9s %s\n",
+ hex_string (kve_start),
+ hex_string (kve_end),
+ hex_string (kve_end - kve_start),
+ hex_string (kve_offset),
+ nbsd_vm_map_entry_flags (kve_flags, kve_protection),
+ kve_path);
+ }
+}
+
+/* Implement the "get_syscall_number" gdbarch method. */
+
+static LONGEST
+nbsd_get_syscall_number (struct gdbarch *gdbarch, thread_info *thread)
+{
+
+ /* NetBSD doesn't use gdbarch_get_syscall_number since NetBSD
+ native targets fetch the system call number from the
+ 'si_sysnum' member of siginfo_t in nbsd_nat_target::wait.
+ However, system call catching requires this function to be
+ set. */
+
+ internal_error (__FILE__, __LINE__, _("nbsd_get_sycall_number called"));
+}
+
+/* See nbsd-tdep.h. */
+
+void
+nbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
+{
+ set_gdbarch_gdb_signal_from_target (gdbarch, nbsd_gdb_signal_from_target);
+ set_gdbarch_gdb_signal_to_target (gdbarch, nbsd_gdb_signal_to_target);
+ set_gdbarch_skip_solib_resolver (gdbarch, nbsd_skip_solib_resolver);
+ set_gdbarch_auxv_parse (gdbarch, svr4_auxv_parse);
- return lmp;
+ /* `catch syscall' */
+ set_xml_syscall_file_name (gdbarch, "syscalls/netbsd.xml");
+ set_gdbarch_get_syscall_number (gdbarch, nbsd_get_syscall_number);
}
projects / deliverable / binutils-gdb.git / blobdiff