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265f716b DJ |
1 | /* GNU/Linux S/390 specific low level interface, for the remote server |
2 | for GDB. | |
6aba47ca | 3 | Copyright (C) 2001, 2002, 2005, 2006, 2007 Free Software Foundation, Inc. |
265f716b DJ |
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 | |
6f0f660e EZ |
19 | Foundation, Inc., 51 Franklin Street, Fifth Floor, |
20 | Boston, MA 02110-1301, USA. */ | |
265f716b DJ |
21 | |
22 | /* This file is used for both 31-bit and 64-bit S/390 systems. */ | |
23 | ||
24 | #include "server.h" | |
25 | #include "linux-low.h" | |
26 | ||
27 | #include <asm/ptrace.h> | |
28 | ||
d0f54f9d | 29 | #define s390_num_regs 51 |
265f716b | 30 | |
2ec06d2e | 31 | static int s390_regmap[] = { |
265f716b DJ |
32 | PT_PSWMASK, PT_PSWADDR, |
33 | ||
34 | PT_GPR0, PT_GPR1, PT_GPR2, PT_GPR3, | |
35 | PT_GPR4, PT_GPR5, PT_GPR6, PT_GPR7, | |
36 | PT_GPR8, PT_GPR9, PT_GPR10, PT_GPR11, | |
37 | PT_GPR12, PT_GPR13, PT_GPR14, PT_GPR15, | |
38 | ||
39 | PT_ACR0, PT_ACR1, PT_ACR2, PT_ACR3, | |
40 | PT_ACR4, PT_ACR5, PT_ACR6, PT_ACR7, | |
41 | PT_ACR8, PT_ACR9, PT_ACR10, PT_ACR11, | |
42 | PT_ACR12, PT_ACR13, PT_ACR14, PT_ACR15, | |
43 | ||
265f716b DJ |
44 | PT_FPC, |
45 | ||
d0f54f9d | 46 | #ifndef __s390x__ |
265f716b DJ |
47 | PT_FPR0_HI, PT_FPR1_HI, PT_FPR2_HI, PT_FPR3_HI, |
48 | PT_FPR4_HI, PT_FPR5_HI, PT_FPR6_HI, PT_FPR7_HI, | |
49 | PT_FPR8_HI, PT_FPR9_HI, PT_FPR10_HI, PT_FPR11_HI, | |
50 | PT_FPR12_HI, PT_FPR13_HI, PT_FPR14_HI, PT_FPR15_HI, | |
51 | #else | |
52 | PT_FPR0, PT_FPR1, PT_FPR2, PT_FPR3, | |
53 | PT_FPR4, PT_FPR5, PT_FPR6, PT_FPR7, | |
54 | PT_FPR8, PT_FPR9, PT_FPR10, PT_FPR11, | |
55 | PT_FPR12, PT_FPR13, PT_FPR14, PT_FPR15, | |
56 | #endif | |
57 | }; | |
58 | ||
2ec06d2e DJ |
59 | static int |
60 | s390_cannot_fetch_register (int regno) | |
265f716b | 61 | { |
2ec06d2e | 62 | if (s390_regmap[regno] == -1) |
265f716b DJ |
63 | return 1; |
64 | ||
65 | return 0; | |
66 | } | |
67 | ||
2ec06d2e DJ |
68 | static int |
69 | s390_cannot_store_register (int regno) | |
265f716b | 70 | { |
2ec06d2e | 71 | if (s390_regmap[regno] == -1) |
265f716b DJ |
72 | return 1; |
73 | ||
74 | return 0; | |
75 | } | |
2ec06d2e | 76 | |
b7149293 UW |
77 | /* Provide only a fill function for the general register set. ps_lgetregs |
78 | will use this for NPTL support. */ | |
79 | ||
80 | static void s390_fill_gregset (void *buf) | |
81 | { | |
82 | int i; | |
83 | ||
84 | for (i = 0; i < 34; i++) | |
85 | collect_register (i, (char *) buf + s390_regmap[i]); | |
86 | } | |
87 | ||
88 | struct regset_info target_regsets[] = { | |
89 | { 0, 0, 0, GENERAL_REGS, s390_fill_gregset, NULL }, | |
90 | { 0, 0, -1, -1, NULL, NULL } | |
91 | }; | |
92 | ||
b0ded00b | 93 | |
f450004a | 94 | static const unsigned char s390_breakpoint[] = { 0, 1 }; |
b0ded00b UW |
95 | #define s390_breakpoint_len 2 |
96 | ||
97 | static CORE_ADDR | |
98 | s390_get_pc () | |
99 | { | |
100 | unsigned long pc; | |
101 | collect_register_by_name ("pswa", &pc); | |
102 | #ifndef __s390x__ | |
103 | pc &= 0x7fffffff; | |
104 | #endif | |
105 | return pc; | |
106 | } | |
107 | ||
108 | static void | |
109 | s390_set_pc (CORE_ADDR newpc) | |
110 | { | |
111 | unsigned long pc = newpc; | |
112 | #ifndef __s390x__ | |
113 | pc |= 0x80000000; | |
114 | #endif | |
115 | supply_register_by_name ("pswa", &pc); | |
116 | } | |
117 | ||
118 | static int | |
119 | s390_breakpoint_at (CORE_ADDR pc) | |
120 | { | |
121 | unsigned char c[s390_breakpoint_len]; | |
122 | read_inferior_memory (pc, c, s390_breakpoint_len); | |
123 | return memcmp (c, s390_breakpoint, s390_breakpoint_len) == 0; | |
124 | } | |
125 | ||
126 | ||
2ec06d2e DJ |
127 | struct linux_target_ops the_low_target = { |
128 | s390_num_regs, | |
129 | s390_regmap, | |
130 | s390_cannot_fetch_register, | |
131 | s390_cannot_store_register, | |
b0ded00b UW |
132 | s390_get_pc, |
133 | s390_set_pc, | |
134 | s390_breakpoint, | |
135 | s390_breakpoint_len, | |
136 | NULL, | |
137 | s390_breakpoint_len, | |
138 | s390_breakpoint_at, | |
2ec06d2e | 139 | }; |
b0ded00b | 140 |