15c48b108SAl Viro /* 25c48b108SAl Viro * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) 35c48b108SAl Viro * Licensed under the GPL 45c48b108SAl Viro */ 55c48b108SAl Viro 65c48b108SAl Viro #ifndef __UM_PROCESSOR_I386_H 75c48b108SAl Viro #define __UM_PROCESSOR_I386_H 85c48b108SAl Viro 95c48b108SAl Viro #include <linux/string.h> 105c48b108SAl Viro #include <asm/segment.h> 11b3ee571eSAl Viro #include <asm/ldt.h> 125c48b108SAl Viro 135c48b108SAl Viro extern int host_has_cmov; 145c48b108SAl Viro 155c48b108SAl Viro struct uml_tls_struct { 165c48b108SAl Viro struct user_desc tls; 175c48b108SAl Viro unsigned flushed:1; 185c48b108SAl Viro unsigned present:1; 195c48b108SAl Viro }; 205c48b108SAl Viro 215c48b108SAl Viro struct arch_thread { 225c48b108SAl Viro struct uml_tls_struct tls_array[GDT_ENTRY_TLS_ENTRIES]; 235c48b108SAl Viro unsigned long debugregs[8]; 245c48b108SAl Viro int debugregs_seq; 255c48b108SAl Viro struct faultinfo faultinfo; 265c48b108SAl Viro }; 275c48b108SAl Viro 285c48b108SAl Viro #define INIT_ARCH_THREAD { \ 295c48b108SAl Viro .tls_array = { [ 0 ... GDT_ENTRY_TLS_ENTRIES - 1 ] = \ 305c48b108SAl Viro { .present = 0, .flushed = 0 } }, \ 315c48b108SAl Viro .debugregs = { [ 0 ... 7 ] = 0 }, \ 325c48b108SAl Viro .debugregs_seq = 0, \ 335c48b108SAl Viro .faultinfo = { 0, 0, 0 } \ 345c48b108SAl Viro } 355c48b108SAl Viro 369d1ee8ceSRichard Weinberger #define STACKSLOTS_PER_LINE 8 379d1ee8ceSRichard Weinberger 385c48b108SAl Viro static inline void arch_flush_thread(struct arch_thread *thread) 395c48b108SAl Viro { 405c48b108SAl Viro /* Clear any TLS still hanging */ 415c48b108SAl Viro memset(&thread->tls_array, 0, sizeof(thread->tls_array)); 425c48b108SAl Viro } 435c48b108SAl Viro 445c48b108SAl Viro static inline void arch_copy_thread(struct arch_thread *from, 455c48b108SAl Viro struct arch_thread *to) 465c48b108SAl Viro { 475c48b108SAl Viro memcpy(&to->tls_array, &from->tls_array, sizeof(from->tls_array)); 485c48b108SAl Viro } 495c48b108SAl Viro 505c48b108SAl Viro /* 515c48b108SAl Viro * Default implementation of macro that returns current 525c48b108SAl Viro * instruction pointer ("program counter"). Stolen 535c48b108SAl Viro * from asm-i386/processor.h 545c48b108SAl Viro */ 555c48b108SAl Viro #define current_text_addr() \ 565c48b108SAl Viro ({ void *pc; __asm__("movl $1f,%0\n1:":"=g" (pc)); pc; }) 575c48b108SAl Viro 589d1ee8ceSRichard Weinberger #define current_sp() ({ void *sp; __asm__("movl %%esp, %0" : "=r" (sp) : ); sp; }) 599d1ee8ceSRichard Weinberger #define current_bp() ({ unsigned long bp; __asm__("movl %%ebp, %0" : "=r" (bp) : ); bp; }) 609d1ee8ceSRichard Weinberger 615c48b108SAl Viro #endif 62