1 /* Target-dependent code for OSF/1 on Alpha.
2 Copyright 2002 Free Software Foundation, Inc.
4 This file is part of GDB.
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.
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.
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,
19 Boston, MA 02111-1307, USA. */
26 #include "alpha-tdep.h"
28 /* Under OSF/1, the __sigtramp routine is frameless and has a frame
29 size of zero, but we are able to backtrace through it. */
31 alpha_osf1_skip_sigtramp_frame (struct frame_info
*frame
, CORE_ADDR pc
)
35 find_pc_partial_function (pc
, &name
, (CORE_ADDR
*) NULL
, (CORE_ADDR
*) NULL
);
36 if (PC_IN_SIGTRAMP (pc
, name
))
42 alpha_osf1_pc_in_sigtramp (CORE_ADDR pc
, char *func_name
)
44 return (func_name
!= NULL
&& STREQ ("__sigtramp", func_name
));
48 alpha_osf1_sigcontext_addr (struct frame_info
*frame
)
50 return (read_memory_integer (frame
->next
? frame
->next
->frame
55 alpha_osf1_init_abi (struct gdbarch_info info
,
56 struct gdbarch
*gdbarch
)
58 struct gdbarch_tdep
*tdep
= gdbarch_tdep (gdbarch
);
60 set_gdbarch_pc_in_sigtramp (gdbarch
, alpha_osf1_pc_in_sigtramp
);
61 /* The next/step support via procfs on OSF1 is broken when running
62 on multi-processor machines. We need to use software single stepping
64 set_gdbarch_software_single_step (gdbarch
, alpha_software_single_step
);
66 tdep
->skip_sigtramp_frame
= alpha_osf1_skip_sigtramp_frame
;
67 tdep
->sigcontext_addr
= alpha_osf1_sigcontext_addr
;
70 tdep
->jb_elt_size
= 8;
74 _initialize_alpha_osf1_tdep (void)
76 gdbarch_register_osabi (bfd_arch_alpha
, GDB_OSABI_OSF1
, alpha_osf1_init_abi
);