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265f716b DJ |
1 | /* GNU/Linux S/390 specific low level interface, for the remote server |
2 | for GDB. | |
b0ded00b | 3 | Copyright 2001, 2002, 2005 |
265f716b DJ |
4 | Free Software Foundation, Inc. |
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 | |
10 | the Free Software Foundation; either version 2 of the License, or | |
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 | |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 59 Temple Place - Suite 330, | |
21 | Boston, MA 02111-1307, USA. */ | |
22 | ||
23 | /* This file is used for both 31-bit and 64-bit S/390 systems. */ | |
24 | ||
25 | #include "server.h" | |
26 | #include "linux-low.h" | |
27 | ||
28 | #include <asm/ptrace.h> | |
29 | ||
d0f54f9d | 30 | #define s390_num_regs 51 |
265f716b | 31 | |
2ec06d2e | 32 | static int s390_regmap[] = { |
265f716b DJ |
33 | PT_PSWMASK, PT_PSWADDR, |
34 | ||
35 | PT_GPR0, PT_GPR1, PT_GPR2, PT_GPR3, | |
36 | PT_GPR4, PT_GPR5, PT_GPR6, PT_GPR7, | |
37 | PT_GPR8, PT_GPR9, PT_GPR10, PT_GPR11, | |
38 | PT_GPR12, PT_GPR13, PT_GPR14, PT_GPR15, | |
39 | ||
40 | PT_ACR0, PT_ACR1, PT_ACR2, PT_ACR3, | |
41 | PT_ACR4, PT_ACR5, PT_ACR6, PT_ACR7, | |
42 | PT_ACR8, PT_ACR9, PT_ACR10, PT_ACR11, | |
43 | PT_ACR12, PT_ACR13, PT_ACR14, PT_ACR15, | |
44 | ||
265f716b DJ |
45 | PT_FPC, |
46 | ||
d0f54f9d | 47 | #ifndef __s390x__ |
265f716b DJ |
48 | PT_FPR0_HI, PT_FPR1_HI, PT_FPR2_HI, PT_FPR3_HI, |
49 | PT_FPR4_HI, PT_FPR5_HI, PT_FPR6_HI, PT_FPR7_HI, | |
50 | PT_FPR8_HI, PT_FPR9_HI, PT_FPR10_HI, PT_FPR11_HI, | |
51 | PT_FPR12_HI, PT_FPR13_HI, PT_FPR14_HI, PT_FPR15_HI, | |
52 | #else | |
53 | PT_FPR0, PT_FPR1, PT_FPR2, PT_FPR3, | |
54 | PT_FPR4, PT_FPR5, PT_FPR6, PT_FPR7, | |
55 | PT_FPR8, PT_FPR9, PT_FPR10, PT_FPR11, | |
56 | PT_FPR12, PT_FPR13, PT_FPR14, PT_FPR15, | |
57 | #endif | |
58 | }; | |
59 | ||
2ec06d2e DJ |
60 | static int |
61 | s390_cannot_fetch_register (int regno) | |
265f716b | 62 | { |
2ec06d2e | 63 | if (s390_regmap[regno] == -1) |
265f716b DJ |
64 | return 1; |
65 | ||
66 | return 0; | |
67 | } | |
68 | ||
2ec06d2e DJ |
69 | static int |
70 | s390_cannot_store_register (int regno) | |
265f716b | 71 | { |
2ec06d2e | 72 | if (s390_regmap[regno] == -1) |
265f716b DJ |
73 | return 1; |
74 | ||
75 | return 0; | |
76 | } | |
2ec06d2e | 77 | |
b0ded00b | 78 | |
f450004a | 79 | static const unsigned char s390_breakpoint[] = { 0, 1 }; |
b0ded00b UW |
80 | #define s390_breakpoint_len 2 |
81 | ||
82 | static CORE_ADDR | |
83 | s390_get_pc () | |
84 | { | |
85 | unsigned long pc; | |
86 | collect_register_by_name ("pswa", &pc); | |
87 | #ifndef __s390x__ | |
88 | pc &= 0x7fffffff; | |
89 | #endif | |
90 | return pc; | |
91 | } | |
92 | ||
93 | static void | |
94 | s390_set_pc (CORE_ADDR newpc) | |
95 | { | |
96 | unsigned long pc = newpc; | |
97 | #ifndef __s390x__ | |
98 | pc |= 0x80000000; | |
99 | #endif | |
100 | supply_register_by_name ("pswa", &pc); | |
101 | } | |
102 | ||
103 | static int | |
104 | s390_breakpoint_at (CORE_ADDR pc) | |
105 | { | |
106 | unsigned char c[s390_breakpoint_len]; | |
107 | read_inferior_memory (pc, c, s390_breakpoint_len); | |
108 | return memcmp (c, s390_breakpoint, s390_breakpoint_len) == 0; | |
109 | } | |
110 | ||
111 | ||
2ec06d2e DJ |
112 | struct linux_target_ops the_low_target = { |
113 | s390_num_regs, | |
114 | s390_regmap, | |
115 | s390_cannot_fetch_register, | |
116 | s390_cannot_store_register, | |
b0ded00b UW |
117 | s390_get_pc, |
118 | s390_set_pc, | |
119 | s390_breakpoint, | |
120 | s390_breakpoint_len, | |
121 | NULL, | |
122 | s390_breakpoint_len, | |
123 | s390_breakpoint_at, | |
2ec06d2e | 124 | }; |
b0ded00b | 125 |