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1 /*
2 * i386 system call definitions
3 *
4 * Copyright (c) 2013 Stacey D. Son
5 *
6 * SPDX-License-Identifier: GPL-2.0-or-later
7 */
8 #ifndef TARGET_SYSCALL_H
9 #define TARGET_SYSCALL_H
10
11 /* default linux values for the selectors */
12 #define __USER_CS (0x23)
13 #define __USER_DS (0x2B)
14
15 struct target_pt_regs {
16 long ebx;
17 long ecx;
18 long edx;
19 long esi;
20 long edi;
21 long ebp;
22 long eax;
23 int xds;
24 int xes;
25 long orig_eax;
26 long eip;
27 int xcs;
28 long eflags;
29 long esp;
30 int xss;
31 };
32
33 /* ioctls */
34
35 #define TARGET_LDT_ENTRIES 8192
36 #define TARGET_LDT_ENTRY_SIZE 8
37
38 #define TARGET_GDT_ENTRIES 9
39 #define TARGET_GDT_ENTRY_TLS_ENTRIES 3
40 #define TARGET_GDT_ENTRY_TLS_MIN 6
41 #define TARGET_GDT_ENTRY_TLS_MAX (TARGET_GDT_ENTRY_TLS_MIN + TARGET_GDT_ENTRY_TLS_ENTRIES - 1)
42
43 struct target_modify_ldt_ldt_s {
44 unsigned int entry_number;
45 abi_ulong base_addr;
46 unsigned int limit;
47 unsigned int flags;
48 };
49
50 /* vm86 defines */
51
52 #define TARGET_BIOSSEG 0x0f000
53
54 #define TARGET_CPU_086 0
55 #define TARGET_CPU_186 1
56 #define TARGET_CPU_286 2
57 #define TARGET_CPU_386 3
58 #define TARGET_CPU_486 4
59 #define TARGET_CPU_586 5
60
61 #define TARGET_VM86_SIGNAL 0 /* return due to signal */
62 #define TARGET_VM86_UNKNOWN 1 /* unhandled GP fault - IO-instruction or similar */
63 #define TARGET_VM86_INTx 2 /* int3/int x instruction (ARG = x) */
64 #define TARGET_VM86_STI 3 /* sti/popf/iret instruction enabled virtual interrupts */
65
66 /*
67 * Additional return values when invoking new vm86()
68 */
69 #define TARGET_VM86_PICRETURN 4 /* return due to pending PIC request */
70 #define TARGET_VM86_TRAP 6 /* return due to DOS-debugger request */
71
72 /*
73 * function codes when invoking new vm86()
74 */
75 #define TARGET_VM86_PLUS_INSTALL_CHECK 0
76 #define TARGET_VM86_ENTER 1
77 #define TARGET_VM86_ENTER_NO_BYPASS 2
78 #define TARGET_VM86_REQUEST_IRQ 3
79 #define TARGET_VM86_FREE_IRQ 4
80 #define TARGET_VM86_GET_IRQ_BITS 5
81 #define TARGET_VM86_GET_AND_RESET_IRQ 6
82
83 /*
84 * This is the stack-layout seen by the user space program when we have
85 * done a translation of "SAVE_ALL" from vm86 mode. The real kernel layout
86 * is 'kernel_vm86_regs' (see below).
87 */
88
89 struct target_vm86_regs {
90 /*
91 * normal regs, with special meaning for the segment descriptors..
92 */
93 abi_long ebx;
94 abi_long ecx;
95 abi_long edx;
96 abi_long esi;
97 abi_long edi;
98 abi_long ebp;
99 abi_long eax;
100 abi_long __null_ds;
101 abi_long __null_es;
102 abi_long __null_fs;
103 abi_long __null_gs;
104 abi_long orig_eax;
105 abi_long eip;
106 unsigned short cs, __csh;
107 abi_long eflags;
108 abi_long esp;
109 unsigned short ss, __ssh;
110 /*
111 * these are specific to v86 mode:
112 */
113 unsigned short es, __esh;
114 unsigned short ds, __dsh;
115 unsigned short fs, __fsh;
116 unsigned short gs, __gsh;
117 };
118
119 struct target_revectored_struct {
120 abi_ulong __map[8]; /* 256 bits */
121 };
122
123 struct target_vm86_struct {
124 struct target_vm86_regs regs;
125 abi_ulong flags;
126 abi_ulong screen_bitmap;
127 abi_ulong cpu_type;
128 struct target_revectored_struct int_revectored;
129 struct target_revectored_struct int21_revectored;
130 };
131
132 /*
133 * flags masks
134 */
135 #define TARGET_VM86_SCREEN_BITMAP 0x0001
136
137 struct target_vm86plus_info_struct {
138 abi_ulong flags;
139 #define TARGET_force_return_for_pic (1 << 0)
140 #define TARGET_vm86dbg_active (1 << 1) /* for debugger */
141 #define TARGET_vm86dbg_TFpendig (1 << 2) /* for debugger */
142 #define TARGET_is_vm86pus (1 << 31) /* for vm86 internal use */
143 unsigned char vm86dbg_intxxtab[32]; /* for debugger */
144 };
145
146 struct target_vm86plus_struct {
147 struct target_vm86_regs regs;
148 abi_ulong flags;
149 abi_ulong screen_bitmap;
150 abi_ulong cpu_type;
151 struct target_revectored_struct int_revectored;
152 struct target_revectored_struct int21_revectored;
153 struct target_vm86plus_info_struct vm86plus;
154 };
155
156 /* FreeBSD sysarch(2) */
157 #define TARGET_FREEBSD_I386_GET_LDT 0
158 #define TARGET_FREEBSD_I386_SET_LDT 1
159 /* I386_IOPL */
160 #define TARGET_FREEBSD_I386_GET_IOPERM 3
161 #define TARGET_FREEBSD_I386_SET_IOPERM 4
162 /* xxxxx */
163 #define TARGET_FREEBSD_I386_VM86 6
164 #define TARGET_FREEBSD_I386_GET_FSBASE 7
165 #define TARGET_FREEBSD_I386_SET_FSBASE 8
166 #define TARGET_FREEBSD_I386_GET_GSBASE 9
167 #define TARGET_FREEBSD_I386_SET_GSBASE 10
168
169
170 #define UNAME_MACHINE "i386"
171 #define TARGET_HW_MACHINE UNAME_MACHINE
172 #define TARGET_HW_MACHINE_ARCH UNAME_MACHINE
173
174 #endif /* TARGET_SYSCALL_H */