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10d6c8cd | 1 | /* Low level Alpha GNU/Linux interface, for GDB when running native. |
6aba47ca | 2 | Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc. |
10d6c8cd DJ |
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 | |
197e01b6 EZ |
18 | Foundation, Inc., 51 Franklin Street, Fifth Floor, |
19 | Boston, MA 02110-1301, USA. */ | |
10d6c8cd DJ |
20 | |
21 | #include "defs.h" | |
22 | #include "target.h" | |
23 | #include "linux-nat.h" | |
b02f9d57 UW |
24 | |
25 | #include "alpha-tdep.h" | |
26 | ||
27 | #include <sys/ptrace.h> | |
28 | #include <alpha/ptrace.h> | |
29 | ||
30 | #include <sys/procfs.h> | |
31 | #include "gregset.h" | |
32 | ||
33 | /* Given a pointer to either a gregset_t or fpregset_t, return a | |
34 | pointer to the first register. */ | |
35 | #define ALPHA_REGSET_BASE(regsetp) ((long *) (regsetp)) | |
36 | ||
37 | /* Given a pointer to a gregset_t, locate the UNIQUE value. */ | |
38 | #define ALPHA_REGSET_UNIQUE(regsetp) ((long *)(regsetp) + 32) | |
39 | ||
40 | /* The address of UNIQUE for ptrace. */ | |
41 | #define ALPHA_UNIQUE_PTRACE_ADDR 65 | |
42 | ||
43 | ||
44 | /* | |
45 | * See the comment in m68k-tdep.c regarding the utility of these functions. | |
46 | */ | |
47 | ||
48 | void | |
49 | supply_gregset (gdb_gregset_t *gregsetp) | |
50 | { | |
51 | long *regp = ALPHA_REGSET_BASE (gregsetp); | |
52 | void *unique = ALPHA_REGSET_UNIQUE (gregsetp); | |
53 | ||
54 | /* PC is in slot 32. */ | |
55 | alpha_supply_int_regs (-1, regp, regp + 31, unique); | |
56 | } | |
57 | ||
58 | void | |
59 | fill_gregset (gdb_gregset_t *gregsetp, int regno) | |
60 | { | |
61 | long *regp = ALPHA_REGSET_BASE (gregsetp); | |
62 | void *unique = ALPHA_REGSET_UNIQUE (gregsetp); | |
63 | ||
64 | /* PC is in slot 32. */ | |
65 | alpha_fill_int_regs (regno, regp, regp + 31, unique); | |
66 | } | |
67 | ||
68 | /* | |
69 | * Now we do the same thing for floating-point registers. | |
70 | * Again, see the comments in m68k-tdep.c. | |
71 | */ | |
72 | ||
73 | void | |
74 | supply_fpregset (gdb_fpregset_t *fpregsetp) | |
75 | { | |
76 | long *regp = ALPHA_REGSET_BASE (fpregsetp); | |
77 | ||
78 | /* FPCR is in slot 32. */ | |
79 | alpha_supply_fp_regs (-1, regp, regp + 31); | |
80 | } | |
81 | ||
82 | void | |
83 | fill_fpregset (gdb_fpregset_t *fpregsetp, int regno) | |
84 | { | |
85 | long *regp = ALPHA_REGSET_BASE (fpregsetp); | |
86 | ||
87 | /* FPCR is in slot 32. */ | |
88 | alpha_fill_fp_regs (regno, regp, regp + 31); | |
89 | } | |
90 | ||
910122bf UW |
91 | |
92 | static CORE_ADDR | |
93 | alpha_linux_register_u_offset (int regno) | |
94 | { | |
b02f9d57 UW |
95 | if (regno == PC_REGNUM) |
96 | return PC; | |
97 | if (regno == ALPHA_UNIQUE_REGNUM) | |
98 | return ALPHA_UNIQUE_PTRACE_ADDR; | |
99 | if (regno < FP0_REGNUM) | |
100 | return GPR_BASE + regno; | |
101 | else | |
102 | return FPR_BASE + regno - FP0_REGNUM; | |
910122bf | 103 | } |
10d6c8cd DJ |
104 | |
105 | void _initialialize_alpha_linux_nat (void); | |
106 | ||
107 | void | |
108 | _initialize_alpha_linux_nat (void) | |
109 | { | |
910122bf | 110 | linux_nat_add_target (linux_trad_target (alpha_linux_register_u_offset)); |
10d6c8cd | 111 | } |