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1 | /* Copyright (C) 2020 Free Software Foundation, Inc. |
2 | ||
3 | This file is part of GDB. | |
4 | ||
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation; either version 3 of the License, or | |
8 | (at your option) any later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
17 | ||
18 | #include <sys/types.h> | |
19 | #include <sys/ptrace.h> | |
20 | #include <limits.h> | |
21 | ||
22 | #include "server.h" | |
23 | #include "netbsd-low.h" | |
24 | #include "gdbsupport/x86-xstate.h" | |
25 | #include "arch/i386.h" | |
26 | #include "x86-tdesc.h" | |
27 | #include "tdesc.h" | |
28 | ||
29 | /* The index of various registers inside the regcache. */ | |
30 | ||
31 | enum netbsd_i386_gdb_regnum | |
32 | { | |
33 | I386_EAX_REGNUM, /* %eax */ | |
34 | I386_ECX_REGNUM, /* %ecx */ | |
35 | I386_EDX_REGNUM, /* %edx */ | |
36 | I386_EBX_REGNUM, /* %ebx */ | |
37 | I386_ESP_REGNUM, /* %esp */ | |
38 | I386_EBP_REGNUM, /* %ebp */ | |
39 | I386_ESI_REGNUM, /* %esi */ | |
40 | I386_EDI_REGNUM, /* %edi */ | |
41 | I386_EIP_REGNUM, /* %eip */ | |
42 | I386_EFLAGS_REGNUM, /* %eflags */ | |
43 | I386_CS_REGNUM, /* %cs */ | |
44 | I386_SS_REGNUM, /* %ss */ | |
45 | I386_DS_REGNUM, /* %ds */ | |
46 | I386_ES_REGNUM, /* %es */ | |
47 | I386_FS_REGNUM, /* %fs */ | |
48 | I386_GS_REGNUM, /* %gs */ | |
49 | I386_ST0_REGNUM /* %st(0) */ | |
50 | }; | |
51 | ||
52 | /* The fill_function for the general-purpose register set. */ | |
53 | ||
54 | static void | |
55 | netbsd_i386_fill_gregset (struct regcache *regcache, char *buf) | |
56 | { | |
57 | struct reg *r = (struct reg *) buf; | |
58 | ||
59 | #define netbsd_i386_collect_gp(regnum, fld) do { \ | |
60 | collect_register (regcache, regnum, &r->r_##fld); \ | |
61 | } while (0) | |
62 | ||
63 | netbsd_i386_collect_gp (I386_EAX_REGNUM, eax); | |
64 | netbsd_i386_collect_gp (I386_EBX_REGNUM, ebx); | |
65 | netbsd_i386_collect_gp (I386_ECX_REGNUM, ecx); | |
66 | netbsd_i386_collect_gp (I386_EDX_REGNUM, edx); | |
67 | netbsd_i386_collect_gp (I386_ESP_REGNUM, esp); | |
68 | netbsd_i386_collect_gp (I386_EBP_REGNUM, ebp); | |
69 | netbsd_i386_collect_gp (I386_ESI_REGNUM, esi); | |
70 | netbsd_i386_collect_gp (I386_EDI_REGNUM, edi); | |
71 | netbsd_i386_collect_gp (I386_EIP_REGNUM, eip); | |
72 | netbsd_i386_collect_gp (I386_EFLAGS_REGNUM, eflags); | |
73 | netbsd_i386_collect_gp (I386_CS_REGNUM, cs); | |
74 | netbsd_i386_collect_gp (I386_SS_REGNUM, ss); | |
75 | netbsd_i386_collect_gp (I386_DS_REGNUM, ds); | |
76 | netbsd_i386_collect_gp (I386_ES_REGNUM, es); | |
77 | netbsd_i386_collect_gp (I386_FS_REGNUM, fs); | |
78 | netbsd_i386_collect_gp (I386_GS_REGNUM, gs); | |
79 | } | |
80 | ||
81 | /* The store_function for the general-purpose register set. */ | |
82 | ||
83 | static void | |
84 | netbsd_i386_store_gregset (struct regcache *regcache, const char *buf) | |
85 | { | |
86 | struct reg *r = (struct reg *) buf; | |
87 | ||
88 | #define netbsd_i386_supply_gp(regnum, fld) do { \ | |
89 | supply_register (regcache, regnum, &r->r_##fld); \ | |
90 | } while(0) | |
91 | ||
92 | netbsd_i386_supply_gp (I386_EAX_REGNUM, eax); | |
93 | netbsd_i386_supply_gp (I386_EBX_REGNUM, ebx); | |
94 | netbsd_i386_supply_gp (I386_ECX_REGNUM, ecx); | |
95 | netbsd_i386_supply_gp (I386_EDX_REGNUM, edx); | |
96 | netbsd_i386_supply_gp (I386_ESP_REGNUM, esp); | |
97 | netbsd_i386_supply_gp (I386_EBP_REGNUM, ebp); | |
98 | netbsd_i386_supply_gp (I386_ESI_REGNUM, esi); | |
99 | netbsd_i386_supply_gp (I386_EDI_REGNUM, edi); | |
100 | netbsd_i386_supply_gp (I386_EIP_REGNUM, eip); | |
101 | netbsd_i386_supply_gp (I386_EFLAGS_REGNUM, eflags); | |
102 | netbsd_i386_supply_gp (I386_CS_REGNUM, cs); | |
103 | netbsd_i386_supply_gp (I386_SS_REGNUM, ss); | |
104 | netbsd_i386_supply_gp (I386_DS_REGNUM, ds); | |
105 | netbsd_i386_supply_gp (I386_ES_REGNUM, es); | |
106 | netbsd_i386_supply_gp (I386_FS_REGNUM, fs); | |
107 | netbsd_i386_supply_gp (I386_GS_REGNUM, gs); | |
108 | } | |
109 | ||
110 | /* Description of all the x86-netbsd register sets. */ | |
111 | ||
112 | static const struct netbsd_regset_info netbsd_target_regsets[] = | |
113 | { | |
114 | /* General Purpose Registers. */ | |
115 | {PT_GETREGS, PT_SETREGS, sizeof (struct reg), | |
116 | netbsd_i386_fill_gregset, netbsd_i386_store_gregset}, | |
117 | /* End of list marker. */ | |
118 | {0, 0, -1, NULL, NULL } | |
119 | }; | |
120 | ||
121 | /* NetBSD target op definitions for the amd64 architecture. */ | |
122 | ||
123 | class netbsd_i386_target : public netbsd_process_target | |
124 | { | |
125 | public: | |
126 | const netbsd_regset_info *get_regs_info () override; | |
127 | ||
128 | void low_arch_setup () override; | |
129 | }; | |
130 | ||
131 | const netbsd_regset_info * | |
132 | netbsd_i386_target::get_regs_info () | |
133 | { | |
134 | return netbsd_target_regsets; | |
135 | } | |
136 | ||
137 | /* Initialize the target description for the architecture of the | |
138 | inferior. */ | |
139 | ||
140 | void | |
141 | netbsd_i386_target::low_arch_setup () | |
142 | { | |
143 | target_desc *tdesc | |
144 | = i386_create_target_description (X86_XSTATE_SSE_MASK, false, false); | |
145 | ||
146 | init_target_desc (tdesc, i386_expedite_regs); | |
147 | ||
148 | current_process ()->tdesc = tdesc; | |
149 | } | |
150 | ||
151 | /* The singleton target ops object. */ | |
152 | ||
153 | static netbsd_i386_target the_netbsd_i386_target; | |
154 | ||
155 | /* The NetBSD target ops object. */ | |
156 | ||
157 | netbsd_process_target *the_netbsd_target = &the_netbsd_i386_target; |