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def18405 MK |
1 | /* Native-dependent code for NetBSD/powerpc. |
2 | ||
b811d2c2 | 3 | Copyright (C) 2002-2020 Free Software Foundation, Inc. |
def18405 | 4 | |
485721b1 | 5 | Contributed by Wasabi Systems, Inc. |
e42180d7 C |
6 | |
7 | This file is part of GDB. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
e42180d7 C |
12 | (at your option) any later version. |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
e42180d7 | 21 | |
52feded7 KR |
22 | /* We define this to get types like register_t. */ |
23 | #define _KERNTYPES | |
0baeab03 PA |
24 | #include "defs.h" |
25 | ||
e42180d7 C |
26 | #include <sys/types.h> |
27 | #include <sys/ptrace.h> | |
28 | #include <machine/reg.h> | |
69e9e646 NW |
29 | #include <machine/frame.h> |
30 | #include <machine/pcb.h> | |
e42180d7 | 31 | |
69e9e646 | 32 | #include "gdbcore.h" |
def18405 | 33 | #include "inferior.h" |
69e9e646 | 34 | #include "regcache.h" |
def18405 | 35 | |
485721b1 | 36 | #include "ppc-tdep.h" |
03b62bbb | 37 | #include "ppc-nbsd-tdep.h" |
def18405 | 38 | #include "bsd-kvm.h" |
5bf970f9 | 39 | #include "inf-ptrace.h" |
9faa006d | 40 | #include "nbsd-nat.h" |
5bf970f9 | 41 | |
9faa006d | 42 | struct ppc_nbsd_nat_target final : public nbsd_nat_target |
f6ac5f3d PA |
43 | { |
44 | void fetch_registers (struct regcache *, int) override; | |
45 | void store_registers (struct regcache *, int) override; | |
46 | }; | |
47 | ||
48 | static ppc_nbsd_nat_target the_ppc_nbsd_nat_target; | |
49 | ||
485721b1 | 50 | /* Returns true if PT_GETREGS fetches this register. */ |
def18405 | 51 | |
485721b1 | 52 | static int |
206988c4 | 53 | getregs_supplies (struct gdbarch *gdbarch, int regnum) |
e42180d7 | 54 | { |
206988c4 | 55 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
485721b1 | 56 | |
def18405 MK |
57 | return ((regnum >= tdep->ppc_gp0_regnum |
58 | && regnum < tdep->ppc_gp0_regnum + ppc_num_gprs) | |
59 | || regnum == tdep->ppc_lr_regnum | |
60 | || regnum == tdep->ppc_cr_regnum | |
61 | || regnum == tdep->ppc_xer_regnum | |
62 | || regnum == tdep->ppc_ctr_regnum | |
206988c4 | 63 | || regnum == gdbarch_pc_regnum (gdbarch)); |
e42180d7 C |
64 | } |
65 | ||
485721b1 | 66 | /* Like above, but for PT_GETFPREGS. */ |
def18405 | 67 | |
485721b1 | 68 | static int |
206988c4 | 69 | getfpregs_supplies (struct gdbarch *gdbarch, int regnum) |
e42180d7 | 70 | { |
206988c4 | 71 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
e42180d7 | 72 | |
383f0f5b JB |
73 | /* FIXME: jimb/2004-05-05: Some PPC variants don't have floating |
74 | point registers. Traditionally, GDB's register set has still | |
75 | listed the floating point registers for such machines, so this | |
76 | code is harmless. However, the new E500 port actually omits the | |
77 | floating point registers entirely from the register set --- they | |
78 | don't even have register numbers assigned to them. | |
79 | ||
80 | It's not clear to me how best to update this code, so this assert | |
81 | will alert the first person to encounter the NetBSD/E500 | |
82 | combination to the problem. */ | |
206988c4 | 83 | gdb_assert (ppc_floating_point_unit_p (gdbarch)); |
383f0f5b | 84 | |
def18405 MK |
85 | return ((regnum >= tdep->ppc_fp0_regnum |
86 | && regnum < tdep->ppc_fp0_regnum + ppc_num_fprs) | |
87 | || regnum == tdep->ppc_fpscr_regnum); | |
485721b1 | 88 | } |
e42180d7 | 89 | |
f6ac5f3d PA |
90 | void |
91 | ppc_nbsd_nat_target::fetch_registers (struct regcache *regcache, int regnum) | |
e42180d7 | 92 | { |
ac7936df | 93 | struct gdbarch *gdbarch = regcache->arch (); |
e99b03dc | 94 | pid_t pid = regcache->ptid ().pid (); |
c7da12c7 | 95 | int lwp = regcache->ptid ().lwp (); |
206988c4 MD |
96 | |
97 | if (regnum == -1 || getregs_supplies (gdbarch, regnum)) | |
485721b1 JT |
98 | { |
99 | struct reg regs; | |
100 | ||
c7da12c7 | 101 | if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, lwp) == -1) |
e2e0b3e5 | 102 | perror_with_name (_("Couldn't get registers")); |
485721b1 | 103 | |
56be3814 | 104 | ppc_supply_gregset (&ppcnbsd_gregset, regcache, |
def18405 | 105 | regnum, ®s, sizeof regs); |
485721b1 JT |
106 | } |
107 | ||
206988c4 | 108 | if (regnum == -1 || getfpregs_supplies (gdbarch, regnum)) |
485721b1 JT |
109 | { |
110 | struct fpreg fpregs; | |
111 | ||
c7da12c7 | 112 | if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, lwp) == -1) |
e2e0b3e5 | 113 | perror_with_name (_("Couldn't get FP registers")); |
485721b1 | 114 | |
56be3814 | 115 | ppc_supply_fpregset (&ppcnbsd_fpregset, regcache, |
def18405 | 116 | regnum, &fpregs, sizeof fpregs); |
485721b1 | 117 | } |
e42180d7 C |
118 | } |
119 | ||
f6ac5f3d PA |
120 | void |
121 | ppc_nbsd_nat_target::store_registers (struct regcache *regcache, int regnum) | |
e42180d7 | 122 | { |
ac7936df | 123 | struct gdbarch *gdbarch = regcache->arch (); |
e99b03dc | 124 | pid_t pid = regcache->ptid ().pid (); |
c7da12c7 | 125 | int lwp = regcache->ptid ().lwp (); |
206988c4 MD |
126 | |
127 | if (regnum == -1 || getregs_supplies (gdbarch, regnum)) | |
485721b1 JT |
128 | { |
129 | struct reg regs; | |
130 | ||
c7da12c7 | 131 | if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, lwp) == -1) |
e2e0b3e5 | 132 | perror_with_name (_("Couldn't get registers")); |
485721b1 | 133 | |
56be3814 | 134 | ppc_collect_gregset (&ppcnbsd_gregset, regcache, |
def18405 | 135 | regnum, ®s, sizeof regs); |
485721b1 | 136 | |
c7da12c7 | 137 | if (ptrace (PT_SETREGS, pid, (PTRACE_TYPE_ARG3) ®s, lwp) == -1) |
e2e0b3e5 | 138 | perror_with_name (_("Couldn't write registers")); |
485721b1 JT |
139 | } |
140 | ||
206988c4 | 141 | if (regnum == -1 || getfpregs_supplies (gdbarch, regnum)) |
485721b1 JT |
142 | { |
143 | struct fpreg fpregs; | |
144 | ||
c7da12c7 | 145 | if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, lwp) == -1) |
e2e0b3e5 | 146 | perror_with_name (_("Couldn't get FP registers")); |
485721b1 | 147 | |
56be3814 | 148 | ppc_collect_fpregset (&ppcnbsd_fpregset, regcache, |
def18405 MK |
149 | regnum, &fpregs, sizeof fpregs); |
150 | ||
c7da12c7 | 151 | if (ptrace (PT_SETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, lwp) == -1) |
e2e0b3e5 | 152 | perror_with_name (_("Couldn't set FP registers")); |
485721b1 | 153 | } |
e42180d7 | 154 | } |
69e9e646 NW |
155 | |
156 | static int | |
157 | ppcnbsd_supply_pcb (struct regcache *regcache, struct pcb *pcb) | |
158 | { | |
159 | struct switchframe sf; | |
160 | struct callframe cf; | |
ac7936df | 161 | struct gdbarch *gdbarch = regcache->arch (); |
40a6adc1 | 162 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
69e9e646 NW |
163 | int i; |
164 | ||
165 | /* The stack pointer shouldn't be zero. */ | |
166 | if (pcb->pcb_sp == 0) | |
167 | return 0; | |
168 | ||
def18405 | 169 | read_memory (pcb->pcb_sp, (gdb_byte *)&sf, sizeof sf); |
73e1c03f SM |
170 | regcache->raw_supply (tdep->ppc_cr_regnum, &sf.cr); |
171 | regcache->raw_supply (tdep->ppc_gp0_regnum + 2, &sf.fixreg2); | |
69e9e646 | 172 | for (i = 0 ; i < 19 ; i++) |
73e1c03f | 173 | regcache->raw_supply (tdep->ppc_gp0_regnum + 13 + i, &sf.fixreg[i]); |
69e9e646 | 174 | |
def18405 | 175 | read_memory(sf.sp, (gdb_byte *)&cf, sizeof(cf)); |
73e1c03f SM |
176 | regcache->raw_supply (tdep->ppc_gp0_regnum + 30, &cf.r30); |
177 | regcache->raw_supply (tdep->ppc_gp0_regnum + 31, &cf.r31); | |
178 | regcache->raw_supply (tdep->ppc_gp0_regnum + 1, &cf.sp); | |
69e9e646 | 179 | |
def18405 | 180 | read_memory(cf.sp, (gdb_byte *)&cf, sizeof(cf)); |
73e1c03f SM |
181 | regcache->raw_supply (tdep->ppc_lr_regnum, &cf.lr); |
182 | regcache->raw_supply (gdbarch_pc_regnum (gdbarch), &cf.lr); | |
69e9e646 NW |
183 | |
184 | return 1; | |
185 | } | |
186 | ||
6c265988 | 187 | void _initialize_ppcnbsd_nat (); |
69e9e646 | 188 | void |
6c265988 | 189 | _initialize_ppcnbsd_nat () |
69e9e646 NW |
190 | { |
191 | /* Support debugging kernel virtual memory images. */ | |
192 | bsd_kvm_add_target (ppcnbsd_supply_pcb); | |
def18405 | 193 | |
d9f719f1 | 194 | add_inf_child_target (&the_ppc_nbsd_nat_target); |
69e9e646 | 195 | } |