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244bc108 | 1 | /* Target-dependent code for the IA-64 for GDB, the GNU debugger. |
bfec0b41 | 2 | Copyright 2000, 2004 |
244bc108 KB |
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" | |
8064c6ae | 23 | #include "arch-utils.h" |
51931cbb | 24 | #include "gdbcore.h" |
244bc108 KB |
25 | |
26 | /* The sigtramp code is in a non-readable (executable-only) region | |
27 | of memory called the ``gate page''. The addresses in question | |
28 | were determined by examining the system headers. They are | |
29 | overly generous to allow for different pages sizes. */ | |
30 | ||
31 | #define GATE_AREA_START 0xa000000000000100LL | |
bfec0b41 | 32 | #define GATE_AREA_END 0xa000000000020000LL |
244bc108 KB |
33 | |
34 | /* Offset to sigcontext structure from frame of handler */ | |
d469a809 | 35 | #define IA64_LINUX_SIGCONTEXT_OFFSET 192 |
244bc108 KB |
36 | |
37 | int | |
38 | ia64_linux_in_sigtramp (CORE_ADDR pc, char *func_name) | |
39 | { | |
40 | return (pc >= (CORE_ADDR) GATE_AREA_START && pc < (CORE_ADDR) GATE_AREA_END); | |
41 | } | |
42 | ||
43 | /* IA-64 GNU/Linux specific function which, given a frame address and | |
44 | a register number, returns the address at which that register may be | |
45 | found. 0 is returned for registers which aren't stored in the the | |
46 | sigcontext structure. */ | |
47 | ||
48 | CORE_ADDR | |
49 | ia64_linux_sigcontext_register_address (CORE_ADDR sp, int regno) | |
50 | { | |
51931cbb JJ |
51 | char buf[8]; |
52 | CORE_ADDR sigcontext_addr = 0; | |
53 | ||
54 | /* The address of the sigcontext area is found at offset 16 in the sigframe. */ | |
55 | read_memory (sp + 16, buf, 8); | |
56 | sigcontext_addr = extract_unsigned_integer (buf, 8); | |
57 | ||
244bc108 | 58 | if (IA64_GR0_REGNUM <= regno && regno <= IA64_GR31_REGNUM) |
51931cbb | 59 | return sigcontext_addr + 200 + 8 * (regno - IA64_GR0_REGNUM); |
244bc108 | 60 | else if (IA64_BR0_REGNUM <= regno && regno <= IA64_BR7_REGNUM) |
51931cbb | 61 | return sigcontext_addr + 136 + 8 * (regno - IA64_BR0_REGNUM); |
244bc108 | 62 | else if (IA64_FR0_REGNUM <= regno && regno <= IA64_FR127_REGNUM) |
51931cbb | 63 | return sigcontext_addr + 464 + 16 * (regno - IA64_FR0_REGNUM); |
244bc108 KB |
64 | else |
65 | switch (regno) | |
66 | { | |
67 | case IA64_IP_REGNUM : | |
51931cbb | 68 | return sigcontext_addr + 40; |
244bc108 | 69 | case IA64_CFM_REGNUM : |
51931cbb | 70 | return sigcontext_addr + 48; |
244bc108 | 71 | case IA64_PSR_REGNUM : |
51931cbb | 72 | return sigcontext_addr + 56; /* user mask only */ |
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73 | /* sc_ar_rsc is provided, from which we could compute bspstore, but |
74 | I don't think it's worth it. Anyway, if we want it, it's at offset | |
75 | 64 */ | |
76 | case IA64_BSP_REGNUM : | |
51931cbb | 77 | return sigcontext_addr + 72; |
244bc108 | 78 | case IA64_RNAT_REGNUM : |
51931cbb | 79 | return sigcontext_addr + 80; |
244bc108 | 80 | case IA64_CCV_REGNUM : |
51931cbb | 81 | return sigcontext_addr + 88; |
244bc108 | 82 | case IA64_UNAT_REGNUM : |
51931cbb | 83 | return sigcontext_addr + 96; |
244bc108 | 84 | case IA64_FPSR_REGNUM : |
51931cbb | 85 | return sigcontext_addr + 104; |
244bc108 | 86 | case IA64_PFS_REGNUM : |
51931cbb | 87 | return sigcontext_addr + 112; |
244bc108 | 88 | case IA64_LC_REGNUM : |
51931cbb | 89 | return sigcontext_addr + 120; |
244bc108 | 90 | case IA64_PR_REGNUM : |
51931cbb | 91 | return sigcontext_addr + 128; |
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92 | default : |
93 | return 0; | |
94 | } | |
95 | } |