/* Target-dependent code for OpenBSD/arm.
- Copyright (C) 2006 Free Software Foundation, Inc.
+ Copyright (C) 2006-2016 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 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,
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., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "osabi.h"
+#include "trad-frame.h"
+#include "tramp-frame.h"
#include "obsd-tdep.h"
#include "arm-tdep.h"
#include "solib-svr4.h"
+/* Signal trampolines. */
+
+static void
+armobsd_sigframe_init (const struct tramp_frame *self,
+ struct frame_info *this_frame,
+ struct trad_frame_cache *cache,
+ CORE_ADDR func)
+{
+ CORE_ADDR sp, sigcontext_addr, addr;
+ int regnum;
+
+ /* We find the appropriate instance of `struct sigcontext' at a
+ fixed offset in the signal frame. */
+ sp = get_frame_register_signed (this_frame, ARM_SP_REGNUM);
+ sigcontext_addr = sp + 16;
+
+ /* PC. */
+ trad_frame_set_reg_addr (cache, ARM_PC_REGNUM, sigcontext_addr + 76);
+
+ /* GPRs. */
+ for (regnum = ARM_A1_REGNUM, addr = sigcontext_addr + 12;
+ regnum <= ARM_LR_REGNUM; regnum++, addr += 4)
+ trad_frame_set_reg_addr (cache, regnum, addr);
+
+ trad_frame_set_id (cache, frame_id_build (sp, func));
+}
+
+static const struct tramp_frame armobsd_sigframe =
+{
+ SIGTRAMP_FRAME,
+ 4,
+ {
+ { 0xe28d0010, -1 }, /* add r0, sp, #16 */
+ { 0xef000067, -1 }, /* swi SYS_sigreturn */
+ { 0xef000001, -1 }, /* swi SYS_exit */
+ { 0xeafffffc, -1 }, /* b . - 8 */
+ { TRAMP_SENTINEL_INSN, -1 }
+ },
+ armobsd_sigframe_init
+};
+\f
+
+/* Override default thumb breakpoints. */
+static const gdb_byte arm_obsd_thumb_le_breakpoint[] = {0xfe, 0xdf};
+static const gdb_byte arm_obsd_thumb_be_breakpoint[] = {0xdf, 0xfe};
+
static void
armobsd_init_abi (struct gdbarch_info info,
struct gdbarch *gdbarch)
if (tdep->fp_model == ARM_FLOAT_AUTO)
tdep->fp_model = ARM_FLOAT_SOFT_VFP;
+ tramp_frame_prepend_unwinder (gdbarch, &armobsd_sigframe);
+
/* OpenBSD/arm uses SVR4-style shared libraries. */
set_solib_svr4_fetch_link_map_offsets
(gdbarch, svr4_ilp32_fetch_link_map_offsets);
tdep->jb_pc = 24;
tdep->jb_elt_size = 4;
+
+ set_gdbarch_iterate_over_regset_sections
+ (gdbarch, armbsd_iterate_over_regset_sections);
+
+ /* OpenBSD/arm uses -fpcc-struct-return by default. */
+ tdep->struct_return = pcc_struct_return;
+
+ /* Single stepping. */
+ set_gdbarch_software_single_step (gdbarch, arm_software_single_step);
+
+ /* Breakpoints. */
+ switch (info.byte_order)
+ {
+ case BFD_ENDIAN_BIG:
+ tdep->thumb_breakpoint = arm_obsd_thumb_be_breakpoint;
+ tdep->thumb_breakpoint_size = sizeof (arm_obsd_thumb_be_breakpoint);
+ break;
+
+ case BFD_ENDIAN_LITTLE:
+ tdep->thumb_breakpoint = arm_obsd_thumb_le_breakpoint;
+ tdep->thumb_breakpoint_size = sizeof (arm_obsd_thumb_le_breakpoint);
+ break;
+ }
}
+\f
+
+static enum gdb_osabi
+armobsd_core_osabi_sniffer (bfd *abfd)
+{
+ if (strcmp (bfd_get_target (abfd), "netbsd-core") == 0)
+ return GDB_OSABI_OPENBSD_ELF;
+
+ return GDB_OSABI_UNKNOWN;
+}
+
+/* Provide a prototype to silence -Wmissing-prototypes. */
+extern initialize_file_ftype _initialize_armobsd_tdep;
void
_initialize_armobsd_tdep (void)
{
+ /* BFD doesn't set a flavour for NetBSD style a.out core files. */
+ gdbarch_register_osabi_sniffer (bfd_arch_arm, bfd_target_unknown_flavour,
+ armobsd_core_osabi_sniffer);
+
gdbarch_register_osabi (bfd_arch_arm, 0, GDB_OSABI_OPENBSD_ELF,
armobsd_init_abi);
}