projects / deliverable / binutils-gdb.git / blame
| Commit | Line | Data |
|---|---|---|
| 1762d96d CV |
1 | /* Target-dependent code for Cygwin running on i386's, for GDB. |
| 2 | Copyright 2003 Free Software Foundation, Inc. | |
| 3 | ||
| 4 | This file is part of GDB. | |
| 5 | ||
| 6 | This program is free software; you can redistribute it and/or modify | |
| 7 | it under the terms of the GNU General Public License as published by | |
| 8 | the Free Software Foundation; either version 2 of the License, or | |
| 9 | (at your option) any later version. | |
| 10 | ||
| 11 | This program is distributed in the hope that it will be useful, | |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 14 | GNU General Public License for more details. | |
| 15 | ||
| 16 | You should have received a copy of the GNU General Public License | |
| 17 | along with this program; if not, write to the Free Software | |
| 18 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
| 19 | ||
| 20 | #include "defs.h" | |
| 21 | ||
| 22 | #include "gdb_string.h" | |
| f870b49b | 23 | #include "gdbcore.h" |
| 1762d96d CV |
24 | #include "i386-tdep.h" |
| 25 | #include "osabi.h" | |
| f870b49b CV |
26 | #include "frame.h" |
| 27 | #include "dummy-frame.h" | |
| 28 | ||
| 29 | static int | |
| 30 | i386_cygwin_frame_chain_valid (CORE_ADDR chain, struct frame_info *thisframe) | |
| 31 | { | |
| 32 | /* In the context where this is used, we get the saved PC before we've | |
| 33 | successfully unwound far enough to be sure what we've got (it may | |
| 34 | be a signal handler caller). If we're dealing with a signal | |
| 35 | handler caller, this will return valid, which is fine. If not, | |
| 36 | it'll make the correct test. */ | |
| 37 | return ((get_frame_type (thisframe) == SIGTRAMP_FRAME) || chain != 0); | |
| 38 | } | |
| 39 | /* Return the chain-pointer for FRAME. In the case of the i386, the | |
| 40 | frame's nominal address is the address of a 4-byte word containing | |
| 41 | the calling frame's address. */ | |
| 42 | static CORE_ADDR | |
| 43 | i386_cygwin_frame_chain (struct frame_info *frame) | |
| 44 | { | |
| 45 | if (pc_in_dummy_frame (get_frame_pc (frame))) | |
| 46 | return get_frame_base (frame); | |
| 47 | ||
| 48 | if (get_frame_type (frame) == SIGTRAMP_FRAME | |
| 49 | || i386_frameless_signal_p (frame)) | |
| 50 | return get_frame_base (frame); | |
| 51 | ||
| 52 | return read_memory_unsigned_integer (get_frame_base (frame), 4); | |
| 53 | } | |
| 1762d96d CV |
54 | |
| 55 | static void | |
| 56 | i386_cygwin_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) | |
| 57 | { | |
| 58 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
| 59 | ||
| 60 | tdep->struct_return = reg_struct_return; | |
| f870b49b CV |
61 | set_gdbarch_deprecated_frame_chain (gdbarch, i386_cygwin_frame_chain); |
| 62 | set_gdbarch_deprecated_frame_chain_valid (gdbarch, i386_cygwin_frame_chain_valid); | |
| 1762d96d CV |
63 | } |
| 64 | ||
| 65 | static enum gdb_osabi | |
| 66 | i386_cygwin_osabi_sniffer (bfd * abfd) | |
| 67 | { | |
| 68 | char *target_name = bfd_get_target (abfd); | |
| 69 | ||
| 70 | /* Interix also uses pei-i386. | |
| 71 | We need a way to distinguish between the two. */ | |
| 72 | if (strcmp (target_name, "pei-i386") == 0) | |
| 73 | return GDB_OSABI_CYGWIN; | |
| 74 | ||
| 75 | return GDB_OSABI_UNKNOWN; | |
| 76 | } | |
| 77 | ||
| 78 | void | |
| 79 | _initialize_i386_cygwin_tdep (void) | |
| 80 | { | |
| 81 | gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_coff_flavour, | |
| 82 | i386_cygwin_osabi_sniffer); | |
| 83 | ||
| 84 | gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_CYGWIN, | |
| 85 | i386_cygwin_init_abi); | |
| 86 | } |