f870b49baf
(i386_cygwin_init_abi): Set i386_cygwin_frame_chain as new frame_chain function. * Makefile.in: Add dependencies due to above change.
86 lines
2.9 KiB
C
86 lines
2.9 KiB
C
/* Target-dependent code for Cygwin running on i386's, for GDB.
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Copyright 2003 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 2 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, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include "gdb_string.h"
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#include "gdbcore.h"
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#include "i386-tdep.h"
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#include "osabi.h"
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#include "frame.h"
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#include "dummy-frame.h"
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static int
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i386_cygwin_frame_chain_valid (CORE_ADDR chain, struct frame_info *thisframe)
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{
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/* In the context where this is used, we get the saved PC before we've
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successfully unwound far enough to be sure what we've got (it may
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be a signal handler caller). If we're dealing with a signal
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handler caller, this will return valid, which is fine. If not,
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it'll make the correct test. */
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return ((get_frame_type (thisframe) == SIGTRAMP_FRAME) || chain != 0);
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}
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/* Return the chain-pointer for FRAME. In the case of the i386, the
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frame's nominal address is the address of a 4-byte word containing
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the calling frame's address. */
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static CORE_ADDR
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i386_cygwin_frame_chain (struct frame_info *frame)
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{
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if (pc_in_dummy_frame (get_frame_pc (frame)))
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return get_frame_base (frame);
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if (get_frame_type (frame) == SIGTRAMP_FRAME
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|| i386_frameless_signal_p (frame))
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return get_frame_base (frame);
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return read_memory_unsigned_integer (get_frame_base (frame), 4);
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}
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static void
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i386_cygwin_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
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{
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struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
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tdep->struct_return = reg_struct_return;
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set_gdbarch_deprecated_frame_chain (gdbarch, i386_cygwin_frame_chain);
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set_gdbarch_deprecated_frame_chain_valid (gdbarch, i386_cygwin_frame_chain_valid);
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}
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static enum gdb_osabi
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i386_cygwin_osabi_sniffer (bfd * abfd)
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{
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char *target_name = bfd_get_target (abfd);
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/* Interix also uses pei-i386.
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We need a way to distinguish between the two. */
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if (strcmp (target_name, "pei-i386") == 0)
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return GDB_OSABI_CYGWIN;
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return GDB_OSABI_UNKNOWN;
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}
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void
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_initialize_i386_cygwin_tdep (void)
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{
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gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_coff_flavour,
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i386_cygwin_osabi_sniffer);
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gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_CYGWIN,
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i386_cygwin_init_abi);
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}
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