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,