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265f716b DJ |
1 | /* GNU/Linux S/390 specific low level interface, for the remote server |
2 | for GDB. | |
9b254dd1 DJ |
3 | Copyright (C) 2001, 2002, 2005, 2006, 2007, 2008 |
4 | Free Software Foundation, Inc. | |
265f716b DJ |
5 | |
6 | This file is part of GDB. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 10 | the Free Software Foundation; either version 3 of the License, or |
265f716b DJ |
11 | (at your option) any later version. |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
265f716b DJ |
20 | |
21 | /* This file is used for both 31-bit and 64-bit S/390 systems. */ | |
22 | ||
23 | #include "server.h" | |
24 | #include "linux-low.h" | |
25 | ||
26 | #include <asm/ptrace.h> | |
27 | ||
d05b4ac3 UW |
28 | /* Defined in auto-generated file reg-s390.c. */ |
29 | void init_registers_s390 (void); | |
30 | /* Defined in auto-generated file reg-s390x.c. */ | |
31 | void init_registers_s390x (void); | |
32 | ||
33 | ||
d0f54f9d | 34 | #define s390_num_regs 51 |
265f716b | 35 | |
2ec06d2e | 36 | static int s390_regmap[] = { |
265f716b DJ |
37 | PT_PSWMASK, PT_PSWADDR, |
38 | ||
39 | PT_GPR0, PT_GPR1, PT_GPR2, PT_GPR3, | |
40 | PT_GPR4, PT_GPR5, PT_GPR6, PT_GPR7, | |
41 | PT_GPR8, PT_GPR9, PT_GPR10, PT_GPR11, | |
42 | PT_GPR12, PT_GPR13, PT_GPR14, PT_GPR15, | |
43 | ||
44 | PT_ACR0, PT_ACR1, PT_ACR2, PT_ACR3, | |
45 | PT_ACR4, PT_ACR5, PT_ACR6, PT_ACR7, | |
46 | PT_ACR8, PT_ACR9, PT_ACR10, PT_ACR11, | |
47 | PT_ACR12, PT_ACR13, PT_ACR14, PT_ACR15, | |
48 | ||
265f716b DJ |
49 | PT_FPC, |
50 | ||
d0f54f9d | 51 | #ifndef __s390x__ |
265f716b DJ |
52 | PT_FPR0_HI, PT_FPR1_HI, PT_FPR2_HI, PT_FPR3_HI, |
53 | PT_FPR4_HI, PT_FPR5_HI, PT_FPR6_HI, PT_FPR7_HI, | |
54 | PT_FPR8_HI, PT_FPR9_HI, PT_FPR10_HI, PT_FPR11_HI, | |
55 | PT_FPR12_HI, PT_FPR13_HI, PT_FPR14_HI, PT_FPR15_HI, | |
56 | #else | |
57 | PT_FPR0, PT_FPR1, PT_FPR2, PT_FPR3, | |
58 | PT_FPR4, PT_FPR5, PT_FPR6, PT_FPR7, | |
59 | PT_FPR8, PT_FPR9, PT_FPR10, PT_FPR11, | |
60 | PT_FPR12, PT_FPR13, PT_FPR14, PT_FPR15, | |
61 | #endif | |
62 | }; | |
63 | ||
2ec06d2e DJ |
64 | static int |
65 | s390_cannot_fetch_register (int regno) | |
265f716b | 66 | { |
2ec06d2e | 67 | if (s390_regmap[regno] == -1) |
265f716b DJ |
68 | return 1; |
69 | ||
70 | return 0; | |
71 | } | |
72 | ||
2ec06d2e DJ |
73 | static int |
74 | s390_cannot_store_register (int regno) | |
265f716b | 75 | { |
2ec06d2e | 76 | if (s390_regmap[regno] == -1) |
265f716b DJ |
77 | return 1; |
78 | ||
79 | return 0; | |
80 | } | |
2ec06d2e | 81 | |
b7149293 UW |
82 | /* Provide only a fill function for the general register set. ps_lgetregs |
83 | will use this for NPTL support. */ | |
84 | ||
85 | static void s390_fill_gregset (void *buf) | |
86 | { | |
87 | int i; | |
88 | ||
89 | for (i = 0; i < 34; i++) | |
90 | collect_register (i, (char *) buf + s390_regmap[i]); | |
91 | } | |
92 | ||
93 | struct regset_info target_regsets[] = { | |
94 | { 0, 0, 0, GENERAL_REGS, s390_fill_gregset, NULL }, | |
95 | { 0, 0, -1, -1, NULL, NULL } | |
96 | }; | |
97 | ||
b0ded00b | 98 | |
f450004a | 99 | static const unsigned char s390_breakpoint[] = { 0, 1 }; |
b0ded00b UW |
100 | #define s390_breakpoint_len 2 |
101 | ||
102 | static CORE_ADDR | |
103 | s390_get_pc () | |
104 | { | |
d61ddec4 UW |
105 | if (register_size (0) == 4) |
106 | { | |
107 | unsigned int pc; | |
108 | collect_register_by_name ("pswa", &pc); | |
b0ded00b | 109 | #ifndef __s390x__ |
d61ddec4 | 110 | pc &= 0x7fffffff; |
b0ded00b | 111 | #endif |
d61ddec4 UW |
112 | return pc; |
113 | } | |
114 | else | |
115 | { | |
116 | unsigned long pc; | |
117 | collect_register_by_name ("pswa", &pc); | |
118 | return pc; | |
119 | } | |
b0ded00b UW |
120 | } |
121 | ||
122 | static void | |
123 | s390_set_pc (CORE_ADDR newpc) | |
124 | { | |
d61ddec4 UW |
125 | if (register_size (0) == 4) |
126 | { | |
127 | unsigned int pc = newpc; | |
b0ded00b | 128 | #ifndef __s390x__ |
d61ddec4 | 129 | pc |= 0x80000000; |
b0ded00b | 130 | #endif |
d61ddec4 UW |
131 | supply_register_by_name ("pswa", &pc); |
132 | } | |
133 | else | |
134 | { | |
135 | unsigned long pc = newpc; | |
136 | supply_register_by_name ("pswa", &pc); | |
137 | } | |
b0ded00b UW |
138 | } |
139 | ||
d61ddec4 UW |
140 | |
141 | static void | |
142 | s390_arch_setup (void) | |
143 | { | |
144 | /* Assume 31-bit inferior process. */ | |
145 | init_registers_s390 (); | |
146 | ||
147 | /* On a 64-bit host, check the low bit of the (31-bit) PSWM | |
148 | -- if this is one, we actually have a 64-bit inferior. */ | |
149 | #ifdef __s390x__ | |
150 | { | |
151 | unsigned int pswm; | |
152 | collect_register_by_name ("pswm", &pswm); | |
153 | if (pswm & 1) | |
154 | init_registers_s390x (); | |
155 | } | |
156 | #endif | |
157 | } | |
158 | ||
159 | ||
b0ded00b UW |
160 | static int |
161 | s390_breakpoint_at (CORE_ADDR pc) | |
162 | { | |
163 | unsigned char c[s390_breakpoint_len]; | |
164 | read_inferior_memory (pc, c, s390_breakpoint_len); | |
165 | return memcmp (c, s390_breakpoint, s390_breakpoint_len) == 0; | |
166 | } | |
167 | ||
168 | ||
2ec06d2e | 169 | struct linux_target_ops the_low_target = { |
d61ddec4 | 170 | s390_arch_setup, |
2ec06d2e DJ |
171 | s390_num_regs, |
172 | s390_regmap, | |
173 | s390_cannot_fetch_register, | |
174 | s390_cannot_store_register, | |
b0ded00b UW |
175 | s390_get_pc, |
176 | s390_set_pc, | |
177 | s390_breakpoint, | |
178 | s390_breakpoint_len, | |
179 | NULL, | |
180 | s390_breakpoint_len, | |
181 | s390_breakpoint_at, | |
2ec06d2e | 182 | }; |
b0ded00b | 183 |