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1ed586ce MK |
1 | /* Native-dependent code for OpenBSD/sparc64. |
2 | ||
1d506c26 | 3 | Copyright (C) 2003-2024 Free Software Foundation, Inc. |
1ed586ce 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 | |
9 | the Free Software Foundation; either version 3 of the License, or | |
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 | |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
1ed586ce MK |
20 | #include "gdbcore.h" |
21 | #include "regcache.h" | |
22 | #include "target.h" | |
23 | ||
24 | #include "sparc64-tdep.h" | |
25 | #include "sparc-nat.h" | |
26 | #include "obsd-nat.h" | |
27 | ||
28 | /* Determine whether `gregset_t' contains register REGNUM. */ | |
29 | ||
30 | static int | |
31 | sparc64obsd_gregset_supplies_p (struct gdbarch *gdbarch, int regnum) | |
32 | { | |
33 | /* Integer registers. */ | |
34 | if ((regnum >= SPARC_G1_REGNUM && regnum <= SPARC_G7_REGNUM) | |
35 | || (regnum >= SPARC_O0_REGNUM && regnum <= SPARC_O7_REGNUM) | |
36 | || (regnum >= SPARC_L0_REGNUM && regnum <= SPARC_L7_REGNUM) | |
37 | || (regnum >= SPARC_I0_REGNUM && regnum <= SPARC_I7_REGNUM)) | |
38 | return 1; | |
39 | ||
40 | /* Control registers. */ | |
41 | if (regnum == SPARC64_PC_REGNUM | |
42 | || regnum == SPARC64_NPC_REGNUM | |
43 | || regnum == SPARC64_STATE_REGNUM | |
44 | || regnum == SPARC64_Y_REGNUM) | |
45 | return 1; | |
46 | ||
47 | return 0; | |
48 | } | |
49 | ||
50 | /* Determine whether `fpregset_t' contains register REGNUM. */ | |
51 | ||
52 | static int | |
53 | sparc64obsd_fpregset_supplies_p (struct gdbarch *gdbarch, int regnum) | |
54 | { | |
55 | /* Floating-point registers. */ | |
56 | if ((regnum >= SPARC_F0_REGNUM && regnum <= SPARC_F31_REGNUM) | |
57 | || (regnum >= SPARC64_F32_REGNUM && regnum <= SPARC64_F62_REGNUM)) | |
58 | return 1; | |
59 | ||
60 | /* Control registers. */ | |
61 | if (regnum == SPARC64_FSR_REGNUM) | |
62 | return 1; | |
63 | ||
64 | return 0; | |
65 | } | |
66 | \f | |
67 | ||
68 | /* Support for debugging kernel virtual memory images. */ | |
69 | ||
70 | #include <sys/types.h> | |
71 | #include <machine/pcb.h> | |
72 | ||
73 | #include "bsd-kvm.h" | |
74 | ||
75 | static int | |
76 | sparc64obsd_supply_pcb (struct regcache *regcache, struct pcb *pcb) | |
77 | { | |
78 | u_int64_t state; | |
79 | int regnum; | |
80 | ||
81 | /* The following is true for OpenBSD 3.0: | |
82 | ||
83 | The pcb contains %sp and %pc, %pstate and %cwp. From this | |
84 | information we reconstruct the register state as it would look | |
85 | when we just returned from cpu_switch(). */ | |
86 | ||
87 | /* The stack pointer shouldn't be zero. */ | |
88 | if (pcb->pcb_sp == 0) | |
89 | return 0; | |
90 | ||
91 | /* If the program counter is zero, this is probably a core dump, and | |
92 | we can get %pc from the stack. */ | |
93 | if (pcb->pcb_pc == 0) | |
94 | read_memory(pcb->pcb_sp + BIAS - 176 + (11 * 8), | |
95 | (gdb_byte *)&pcb->pcb_pc, sizeof pcb->pcb_pc); | |
96 | ||
73e1c03f SM |
97 | regcache->raw_supply (SPARC_SP_REGNUM, &pcb->pcb_sp); |
98 | regcache->raw_supply (SPARC64_PC_REGNUM, &pcb->pcb_pc); | |
1ed586ce MK |
99 | |
100 | state = pcb->pcb_pstate << 8 | pcb->pcb_cwp; | |
73e1c03f | 101 | regcache->raw_supply (SPARC64_STATE_REGNUM, &state); |
1ed586ce MK |
102 | |
103 | sparc_supply_rwindow (regcache, pcb->pcb_sp, -1); | |
104 | ||
105 | return 1; | |
106 | } | |
107 | ||
f6ac5f3d PA |
108 | /* Add some extra features to the generic SPARC target. */ |
109 | static sparc_target<obsd_nat_target> the_sparc64_obsd_nat_target; | |
110 | ||
6c265988 | 111 | void _initialize_sparc64obsd_nat (); |
1ed586ce | 112 | void |
6c265988 | 113 | _initialize_sparc64obsd_nat () |
1ed586ce MK |
114 | { |
115 | sparc_supply_gregset = sparc64_supply_gregset; | |
116 | sparc_collect_gregset = sparc64_collect_gregset; | |
117 | sparc_supply_fpregset = sparc64_supply_fpregset; | |
118 | sparc_collect_fpregset = sparc64_collect_fpregset; | |
119 | sparc_gregset_supplies_p = sparc64obsd_gregset_supplies_p; | |
120 | sparc_fpregset_supplies_p = sparc64obsd_fpregset_supplies_p; | |
121 | ||
b4fd25c9 AA |
122 | sparc_gregmap = &sparc64nbsd_gregmap; |
123 | sparc_fpregmap = &sparc64_bsd_fpregmap; | |
1ed586ce MK |
124 | |
125 | /* Add some extra features to the generic SPARC target. */ | |
d9f719f1 | 126 | add_inf_child_target (&the_sparc64_obsd_nat_target); |
1ed586ce MK |
127 | |
128 | /* Support debugging kernel virtual memory images. */ | |
129 | bsd_kvm_add_target (sparc64obsd_supply_pcb); | |
130 | } |