1 /* GNU/Linux S/390 specific low level interface, for the remote server
3 Copyright (C) 2001, 2002, 2005, 2006, 2007, 2008, 2009
4 Free Software Foundation, Inc.
6 This file is part of GDB.
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 3 of the License, or
11 (at your option) any later version.
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.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
21 /* This file is used for both 31-bit and 64-bit S/390 systems. */
24 #include "linux-low.h"
26 #include <asm/ptrace.h>
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);
34 #define s390_num_regs 51
36 static int s390_regmap
[] = {
37 PT_PSWMASK
, PT_PSWADDR
,
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
,
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
,
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
,
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
,
65 s390_cannot_fetch_register (int regno
)
67 if (s390_regmap
[regno
] == -1)
74 s390_cannot_store_register (int regno
)
76 if (s390_regmap
[regno
] == -1)
83 s390_collect_ptrace_register (int regno
, char *buf
)
85 int size
= register_size (regno
);
86 if (size
< sizeof (long))
88 memset (buf
, 0, sizeof (long));
90 if (regno
== find_regno ("pswa")
91 || (regno
>= find_regno ("r0") && regno
<= find_regno ("r15")))
92 collect_register (regno
, buf
+ sizeof (long) - size
);
94 collect_register (regno
, buf
);
96 /* When debugging a 32-bit inferior on a 64-bit host, make sure
97 the 31-bit addressing mode bit is set in the PSW mask. */
98 if (regno
== find_regno ("pswm"))
102 collect_register (regno
, buf
);
106 s390_supply_ptrace_register (int regno
, const char *buf
)
108 int size
= register_size (regno
);
109 if (size
< sizeof (long))
111 if (regno
== find_regno ("pswa")
112 || (regno
>= find_regno ("r0") && regno
<= find_regno ("r15")))
113 supply_register (regno
, buf
+ sizeof (long) - size
);
115 supply_register (regno
, buf
);
118 supply_register (regno
, buf
);
121 /* Provide only a fill function for the general register set. ps_lgetregs
122 will use this for NPTL support. */
124 static void s390_fill_gregset (void *buf
)
128 for (i
= 0; i
< 34; i
++)
129 s390_collect_ptrace_register (i
, (char *) buf
+ s390_regmap
[i
]);
132 struct regset_info target_regsets
[] = {
133 { 0, 0, 0, GENERAL_REGS
, s390_fill_gregset
, NULL
},
134 { 0, 0, -1, -1, NULL
, NULL
}
138 static const unsigned char s390_breakpoint
[] = { 0, 1 };
139 #define s390_breakpoint_len 2
144 if (register_size (0) == 4)
147 collect_register_by_name ("pswa", &pc
);
156 collect_register_by_name ("pswa", &pc
);
162 s390_set_pc (CORE_ADDR newpc
)
164 if (register_size (0) == 4)
166 unsigned int pc
= newpc
;
170 supply_register_by_name ("pswa", &pc
);
174 unsigned long pc
= newpc
;
175 supply_register_by_name ("pswa", &pc
);
181 s390_arch_setup (void)
183 /* Assume 31-bit inferior process. */
184 init_registers_s390 ();
186 /* On a 64-bit host, check the low bit of the (31-bit) PSWM
187 -- if this is one, we actually have a 64-bit inferior. */
191 collect_register_by_name ("pswm", &pswm
);
193 init_registers_s390x ();
200 s390_breakpoint_at (CORE_ADDR pc
)
202 unsigned char c
[s390_breakpoint_len
];
203 read_inferior_memory (pc
, c
, s390_breakpoint_len
);
204 return memcmp (c
, s390_breakpoint
, s390_breakpoint_len
) == 0;
208 struct linux_target_ops the_low_target
= {
212 s390_cannot_fetch_register
,
213 s390_cannot_store_register
,
225 s390_collect_ptrace_register
,
226 s390_supply_ptrace_register
,