1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
|
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/mman.h>
#include <sys/io.h>
#include <string.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#define SHMERRORPTR (pointer)(-1)
#define _INT10_PRIVATE
#include "xf86include/xf86int10.h"
#include "x86emu.h"
#include "xf86include/xf86x86emu.h"
#include "lrmi.h"
#include "x86-common.h"
#define ALLOC_ENTRIES(x) (V_RAM - 1)
#define TRUE 1
#define FALSE 0
#define __BUILDIO(bwl,bw,type) \
static inline void out##bwl##_local(unsigned long port, unsigned type value) { __asm__ __volatile__("out" #bwl " %" #bw "0, %w1" : : "a"(value), "Nd"(port)); \
}\
static inline unsigned type in##bwl##_local(unsigned long port) { \
unsigned type value; \
__asm__ __volatile__("in" #bwl " %w1, %" #bw "0" : "=a"(value) : "Nd"(port)); \
return value; \
}\
__BUILDIO(b,b,char)
__BUILDIO(w,w,short)
__BUILDIO(l,,int)
char *mmap_addr = SHMERRORPTR;
struct LRMI_regs *regs;
static void *stack;
void vprintk(const char *fmt, va_list ap)
{
vfprintf(stderr, fmt, ap);
}
void
printk(const char *fmt, ...)
{
va_list argptr;
va_start(argptr, fmt);
vprintk(fmt, argptr);
va_end(argptr);
}
u8 read_b(int addr) {
return *((char *)mmap_addr + addr);
}
CARD8
x_inb(CARD16 port)
{
CARD8 val;
val = inb_local(port);
return val;
}
CARD16
x_inw(CARD16 port)
{
CARD16 val;
val = inw_local(port);
return val;
}
CARD32
x_inl(CARD16 port)
{
CARD32 val;
val = inl_local(port);
return val;
}
void
x_outb(CARD16 port, CARD8 val)
{
outb_local(port, val);
}
void
x_outw(CARD16 port, CARD16 val)
{
outw_local(port, val);
}
void x_outl(CARD16 port, CARD32 val)
{
outl_local(port, val);
}
void pushw(u16 val)
{
X86_ESP -= 2;
MEM_WW(((u32) X86_SS << 4) + X86_SP, val);
}
static void x86emu_do_int(int num)
{
u32 eflags;
/* fprintf(stderr, "Calling INT 0x%X (%04X:%04X)\n", num,
(read_b((num << 2) + 3) << 8) + read_b((num << 2) + 2),
(read_b((num << 2) + 1) << 8) + read_b((num << 2)));
fprintf(stderr, " EAX is %X\n", (int) X86_EAX);
*/
eflags = X86_EFLAGS;
eflags = eflags | X86_IF_MASK;
pushw(eflags);
pushw(X86_CS);
pushw(X86_IP);
X86_EFLAGS = X86_EFLAGS & ~(X86_VIF_MASK | X86_TF_MASK);
X86_CS = (read_b((num << 2) + 3) << 8) + read_b((num << 2) + 2);
X86_IP = (read_b((num << 2) + 1) << 8) + read_b((num << 2));
/* fprintf(stderr, "Leaving interrupt call.\n"); */
}
int LRMI_init() {
int i;
X86EMU_intrFuncs intFuncs[256];
if (!LRMI_common_init())
return 0;
mmap_addr = 0;
X86EMU_pioFuncs pioFuncs = {
(&x_inb),
(&x_inw),
(&x_inl),
(&x_outb),
(&x_outw),
(&x_outl)
};
X86EMU_setupPioFuncs(&pioFuncs);
for (i=0;i<256;i++)
intFuncs[i] = x86emu_do_int;
X86EMU_setupIntrFuncs(intFuncs);
X86_EFLAGS = X86_IF_MASK | X86_IOPL_MASK;
/*
* Allocate a 64k stack.
*/
stack = LRMI_alloc_real(64 * 1024);
X86_SS = (unsigned long)stack >> 4;
X86_ESP = 0xFFF9;
memset (stack, 0, 64*1024);
*((char *)0) = 0x4f; /* Make sure that we end up jumping back to a
halt instruction */
M.mem_base = 0;
M.mem_size = 1024*1024;
return 1;
}
int real_call(struct LRMI_regs *registers) {
regs = registers;
X86_EAX = registers->eax;
X86_EBX = registers->ebx;
X86_ECX = registers->ecx;
X86_EDX = registers->edx;
X86_ESI = registers->esi;
X86_EDI = registers->edi;
X86_EBP = registers->ebp;
X86_EIP = registers->ip;
X86_ES = registers->es;
X86_FS = registers->fs;
X86_GS = registers->gs;
X86_CS = registers->cs;
if (registers->ss != 0) {
X86_SS = registers->ss;
} else {
X86_SS = (unsigned long)stack >> 4;
}
if (registers->ds != 0) {
X86_DS = registers->ds;
}
if (registers->sp != 0) {
X86_ESP = registers->sp;
} else {
X86_ESP = 0xFFF9;
}
memset (stack, 0, 64*1024);
X86EMU_exec();
registers->eax = X86_EAX;
registers->ebx = X86_EBX;
registers->ecx = X86_ECX;
registers->edx = X86_EDX;
registers->esi = X86_ESI;
registers->edi = X86_EDI;
registers->ebp = X86_EBP;
registers->es = X86_ES;
return 1;
}
int LRMI_int(int num, struct LRMI_regs *registers) {
u32 eflags;
eflags = X86_EFLAGS;
eflags = eflags | X86_IF_MASK;
X86_EFLAGS = X86_EFLAGS & ~(X86_VIF_MASK | X86_TF_MASK | X86_IF_MASK | X86_NT_MASK);
registers->cs = (read_b((num << 2) + 3) << 8) + read_b((num << 2) + 2);
registers->ip = (read_b((num << 2) + 1) << 8) + read_b((num << 2));
regs = registers;
return real_call(registers);
}
int LRMI_call(struct LRMI_regs *registers) {
return real_call(registers);
}
size_t
LRMI_base_addr(void)
{
return (size_t)mmap_addr;
}
|
