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1 | /* Target-dependent code for the IA-64 for GDB, the GNU debugger. |
2 | Copyright 2000 | |
3 | Free Software Foundation, Inc. | |
4 | ||
5 | This file is part of GDB. | |
6 | ||
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. | |
11 | ||
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. | |
16 | ||
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. */ | |
21 | ||
22 | #include "defs.h" | |
23 | ||
24 | /* The sigtramp code is in a non-readable (executable-only) region | |
25 | of memory called the ``gate page''. The addresses in question | |
26 | were determined by examining the system headers. They are | |
27 | overly generous to allow for different pages sizes. */ | |
28 | ||
29 | #define GATE_AREA_START 0xa000000000000100LL | |
30 | #define GATE_AREA_END 0xa000000000010000LL | |
31 | ||
32 | /* Offset to sigcontext structure from frame of handler */ | |
33 | #define IA64_LINUX_SIGCONTEXT_OFFSET 160 | |
34 | ||
35 | int | |
36 | ia64_linux_in_sigtramp (CORE_ADDR pc, char *func_name) | |
37 | { | |
38 | return (pc >= (CORE_ADDR) GATE_AREA_START && pc < (CORE_ADDR) GATE_AREA_END); | |
39 | } | |
40 | ||
41 | /* IA-64 GNU/Linux specific function which, given a frame address and | |
42 | a register number, returns the address at which that register may be | |
43 | found. 0 is returned for registers which aren't stored in the the | |
44 | sigcontext structure. */ | |
45 | ||
46 | CORE_ADDR | |
47 | ia64_linux_sigcontext_register_address (CORE_ADDR sp, int regno) | |
48 | { | |
49 | if (IA64_GR0_REGNUM <= regno && regno <= IA64_GR31_REGNUM) | |
50 | return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 200 + 8 * (regno - IA64_GR0_REGNUM); | |
51 | else if (IA64_BR0_REGNUM <= regno && regno <= IA64_BR7_REGNUM) | |
52 | return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 136 + 8 * (regno - IA64_BR0_REGNUM); | |
53 | else if (IA64_FR0_REGNUM <= regno && regno <= IA64_FR127_REGNUM) | |
54 | return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 464 + 16 * (regno - IA64_FR0_REGNUM); | |
55 | else | |
56 | switch (regno) | |
57 | { | |
58 | case IA64_IP_REGNUM : | |
59 | return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 40; | |
60 | case IA64_CFM_REGNUM : | |
61 | return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 48; | |
62 | case IA64_PSR_REGNUM : | |
63 | return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 56; /* user mask only */ | |
64 | /* sc_ar_rsc is provided, from which we could compute bspstore, but | |
65 | I don't think it's worth it. Anyway, if we want it, it's at offset | |
66 | 64 */ | |
67 | case IA64_BSP_REGNUM : | |
68 | return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 72; | |
69 | case IA64_RNAT_REGNUM : | |
70 | return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 80; | |
71 | case IA64_CCV_REGNUM : | |
72 | return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 88; | |
73 | case IA64_UNAT_REGNUM : | |
74 | return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 96; | |
75 | case IA64_FPSR_REGNUM : | |
76 | return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 104; | |
77 | case IA64_PFS_REGNUM : | |
78 | return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 112; | |
79 | case IA64_LC_REGNUM : | |
80 | return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 120; | |
81 | case IA64_PR_REGNUM : | |
82 | return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 128; | |
83 | default : | |
84 | return 0; | |
85 | } | |
86 | } |