1 /*
2 * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
3 * Licensed under the GPL
4 */
5
6 #ifndef __UM_PROCESSOR_I386_H
7 #define __UM_PROCESSOR_I386_H
8
9 #include <linux/string.h>
10 #include <asm/segment.h>
11 #include <asm/ldt.h>
12
13 extern int host_has_cmov;
14
15 struct uml_tls_struct {
16 struct user_desc tls;
17 unsigned flushed:1;
18 unsigned present:1;
19 };
20
21 struct arch_thread {
22 struct uml_tls_struct tls_array[GDT_ENTRY_TLS_ENTRIES];
23 unsigned long debugregs[8];
24 int debugregs_seq;
25 struct faultinfo faultinfo;
26 };
27
28 #define INIT_ARCH_THREAD { \
29 .tls_array = { [ 0 ... GDT_ENTRY_TLS_ENTRIES - 1 ] = \
30 { .present = 0, .flushed = 0 } }, \
31 .debugregs = { [ 0 ... 7 ] = 0 }, \
32 .debugregs_seq = 0, \
33 .faultinfo = { 0, 0, 0 } \
34 }
35
36 #define STACKSLOTS_PER_LINE 8
37
38 static inline void arch_flush_thread(struct arch_thread *thread)
39 {
40 /* Clear any TLS still hanging */
41 memset(&thread->tls_array, 0, sizeof(thread->tls_array));
42 }
43
44 static inline void arch_copy_thread(struct arch_thread *from,
45 struct arch_thread *to)
46 {
47 memcpy(&to->tls_array, &from->tls_array, sizeof(from->tls_array));
48 }
49
50 #define current_sp() ({ void *sp; __asm__("movl %%esp, %0" : "=r" (sp) : ); sp; })
51 #define current_bp() ({ unsigned long bp; __asm__("movl %%ebp, %0" : "=r" (bp) : ); bp; })
52
53 #endif
54
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