1 /* Target-dependent code for the IA-64 for GDB, the GNU debugger.
3 Copyright 2000, 2004 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
23 #include "ia64-tdep.h"
24 #include "arch-utils.h"
27 /* The sigtramp code is in a non-readable (executable-only) region
28 of memory called the ``gate page''. The addresses in question
29 were determined by examining the system headers. They are
30 overly generous to allow for different pages sizes. */
32 #define GATE_AREA_START 0xa000000000000100LL
33 #define GATE_AREA_END 0xa000000000020000LL
35 /* Offset to sigcontext structure from frame of handler */
36 #define IA64_LINUX_SIGCONTEXT_OFFSET 192
39 ia64_linux_in_sigtramp (CORE_ADDR pc
, char *func_name
)
41 return (pc
>= (CORE_ADDR
) GATE_AREA_START
&& pc
< (CORE_ADDR
) GATE_AREA_END
);
44 /* IA-64 GNU/Linux specific function which, given a frame address and
45 a register number, returns the address at which that register may be
46 found. 0 is returned for registers which aren't stored in the the
47 sigcontext structure. */
50 ia64_linux_sigcontext_register_address (CORE_ADDR sp
, int regno
)
53 CORE_ADDR sigcontext_addr
= 0;
55 /* The address of the sigcontext area is found at offset 16 in the sigframe. */
56 read_memory (sp
+ 16, buf
, 8);
57 sigcontext_addr
= extract_unsigned_integer (buf
, 8);
59 if (IA64_GR0_REGNUM
<= regno
&& regno
<= IA64_GR31_REGNUM
)
60 return sigcontext_addr
+ 200 + 8 * (regno
- IA64_GR0_REGNUM
);
61 else if (IA64_BR0_REGNUM
<= regno
&& regno
<= IA64_BR7_REGNUM
)
62 return sigcontext_addr
+ 136 + 8 * (regno
- IA64_BR0_REGNUM
);
63 else if (IA64_FR0_REGNUM
<= regno
&& regno
<= IA64_FR127_REGNUM
)
64 return sigcontext_addr
+ 464 + 16 * (regno
- IA64_FR0_REGNUM
);
69 return sigcontext_addr
+ 40;
70 case IA64_CFM_REGNUM
:
71 return sigcontext_addr
+ 48;
72 case IA64_PSR_REGNUM
:
73 return sigcontext_addr
+ 56; /* user mask only */
74 /* sc_ar_rsc is provided, from which we could compute bspstore, but
75 I don't think it's worth it. Anyway, if we want it, it's at offset
77 case IA64_BSP_REGNUM
:
78 return sigcontext_addr
+ 72;
79 case IA64_RNAT_REGNUM
:
80 return sigcontext_addr
+ 80;
81 case IA64_CCV_REGNUM
:
82 return sigcontext_addr
+ 88;
83 case IA64_UNAT_REGNUM
:
84 return sigcontext_addr
+ 96;
85 case IA64_FPSR_REGNUM
:
86 return sigcontext_addr
+ 104;
87 case IA64_PFS_REGNUM
:
88 return sigcontext_addr
+ 112;
90 return sigcontext_addr
+ 120;
92 return sigcontext_addr
+ 128;