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 arch_flush_thread(struct arch_thread * thread)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 arch_copy_thread(struct arch_thread * from,struct arch_thread * to)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