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b9e1c0d6 | 1 | /* Native-dependent code for modern VAX BSD's. |
53284fc1 | 2 | |
b811d2c2 | 3 | Copyright (C) 2004-2020 Free Software Foundation, Inc. |
53284fc1 MK |
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 | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
53284fc1 MK |
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 | |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
53284fc1 | 19 | |
25567eee KR |
20 | /* We define this to get types like register_t. */ |
21 | #define _KERNTYPES | |
53284fc1 MK |
22 | #include "defs.h" |
23 | #include "inferior.h" | |
24 | #include "regcache.h" | |
ba0cd111 | 25 | #include "target.h" |
53284fc1 MK |
26 | |
27 | #include <sys/types.h> | |
28 | #include <sys/ptrace.h> | |
29 | #include <machine/reg.h> | |
30 | ||
31 | #include "vax-tdep.h" | |
ba0cd111 | 32 | #include "inf-ptrace.h" |
d5be5fa4 | 33 | #include "nbsd-nat.h" |
53284fc1 | 34 | |
d5be5fa4 | 35 | struct vax_bsd_nat_target final : public nbsd_nat_target |
f6ac5f3d PA |
36 | { |
37 | void fetch_registers (struct regcache *, int) override; | |
38 | void store_registers (struct regcache *, int) override; | |
39 | }; | |
40 | ||
41 | static vax_bsd_nat_target the_vax_bsd_nat_target; | |
42 | ||
53284fc1 MK |
43 | /* Supply the general-purpose registers stored in GREGS to REGCACHE. */ |
44 | ||
45 | static void | |
46 | vaxbsd_supply_gregset (struct regcache *regcache, const void *gregs) | |
47 | { | |
12753073 | 48 | const gdb_byte *regs = (const gdb_byte *)gregs; |
53284fc1 MK |
49 | int regnum; |
50 | ||
51 | for (regnum = 0; regnum < VAX_NUM_REGS; regnum++) | |
73e1c03f | 52 | regcache->raw_supply (regnum, regs + regnum * 4); |
53284fc1 MK |
53 | } |
54 | ||
55 | /* Collect the general-purpose registers from REGCACHE and store them | |
56 | in GREGS. */ | |
57 | ||
58 | static void | |
59 | vaxbsd_collect_gregset (const struct regcache *regcache, | |
60 | void *gregs, int regnum) | |
61 | { | |
12753073 | 62 | gdb_byte *regs = (void *)gregs; |
53284fc1 MK |
63 | int i; |
64 | ||
65 | for (i = 0; i <= VAX_NUM_REGS; i++) | |
66 | { | |
67 | if (regnum == -1 || regnum == i) | |
34a79281 | 68 | regcache->raw_collect (i, regs + i * 4); |
53284fc1 MK |
69 | } |
70 | } | |
71 | \f | |
72 | ||
73 | /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this | |
74 | for all registers. */ | |
75 | ||
f6ac5f3d PA |
76 | void |
77 | vax_bsd_nat_target::fetch_registers (struct regcache *regcache, int regnum) | |
53284fc1 MK |
78 | { |
79 | struct reg regs; | |
e99b03dc | 80 | pid_t pid = regcache->ptid ().pid (); |
6227b330 | 81 | int lwp = regcache->ptid ().lwp (); |
53284fc1 | 82 | |
6227b330 | 83 | if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, lwp) == -1) |
e2e0b3e5 | 84 | perror_with_name (_("Couldn't get registers")); |
53284fc1 | 85 | |
56be3814 | 86 | vaxbsd_supply_gregset (regcache, ®s); |
53284fc1 MK |
87 | } |
88 | ||
89 | /* Store register REGNUM back into the inferior. If REGNUM is -1, do | |
90 | this for all registers. */ | |
91 | ||
f6ac5f3d PA |
92 | void |
93 | vax_bsd_nat_target::store_registers (struct regcache *regcache, int regnum) | |
53284fc1 MK |
94 | { |
95 | struct reg regs; | |
e99b03dc | 96 | pid_t pid = regcache->ptid ().pid (); |
6227b330 | 97 | int lwp = regcache->ptid ().lwp (); |
53284fc1 | 98 | |
6227b330 | 99 | if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, lwp) == -1) |
e2e0b3e5 | 100 | perror_with_name (_("Couldn't get registers")); |
53284fc1 | 101 | |
56be3814 | 102 | vaxbsd_collect_gregset (regcache, ®s, regnum); |
53284fc1 | 103 | |
6227b330 | 104 | if (ptrace (PT_SETREGS, pid, (PTRACE_TYPE_ARG3) ®s, lwp) == -1) |
e2e0b3e5 | 105 | perror_with_name (_("Couldn't write registers")); |
53284fc1 | 106 | } |
7ddd7709 MK |
107 | \f |
108 | ||
109 | /* Support for debugging kernel virtual memory images. */ | |
110 | ||
7ddd7709 MK |
111 | #include <machine/pcb.h> |
112 | ||
113 | #include "bsd-kvm.h" | |
114 | ||
115 | static int | |
116 | vaxbsd_supply_pcb (struct regcache *regcache, struct pcb *pcb) | |
117 | { | |
118 | int regnum; | |
119 | ||
120 | /* The following is true for OpenBSD 3.5: | |
121 | ||
122 | The pcb contains the register state at the context switch inside | |
123 | cpu_switch(). */ | |
124 | ||
125 | /* The stack pointer shouldn't be zero. */ | |
126 | if (pcb->KSP == 0) | |
127 | return 0; | |
128 | ||
129 | for (regnum = VAX_R0_REGNUM; regnum < VAX_AP_REGNUM; regnum++) | |
73e1c03f SM |
130 | regcache->raw_supply (regnum, &pcb->R[regnum - VAX_R0_REGNUM]); |
131 | regcache->raw_supply (VAX_AP_REGNUM, &pcb->AP); | |
132 | regcache->raw_supply (VAX_FP_REGNUM, &pcb->FP); | |
133 | regcache->raw_supply (VAX_SP_REGNUM, &pcb->KSP); | |
134 | regcache->raw_supply (VAX_PC_REGNUM, &pcb->PC); | |
135 | regcache->raw_supply (VAX_PS_REGNUM, &pcb->PSL); | |
7ddd7709 MK |
136 | |
137 | return 1; | |
138 | } | |
7ddd7709 | 139 | |
6c265988 | 140 | void _initialize_vaxbsd_nat (); |
7ddd7709 | 141 | void |
6c265988 | 142 | _initialize_vaxbsd_nat () |
7ddd7709 | 143 | { |
d9f719f1 | 144 | add_inf_child_target (&the_vax_bsd_nat_target); |
ba0cd111 | 145 | |
7ddd7709 MK |
146 | /* Support debugging kernel virtual memory images. */ |
147 | bsd_kvm_add_target (vaxbsd_supply_pcb); | |
148 | } |