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/*
* Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
* Licensed under the GPL
*/
#ifndef __UM_PROCESSOR_I386_H
#define __UM_PROCESSOR_I386_H
#include <linux/string.h>
#include <asm/segment.h>
#include <asm/ldt.h>
extern int host_has_cmov;
struct uml_tls_struct {
struct user_desc tls;
unsigned flushed:1;
unsigned present:1;
};
struct arch_thread {
struct uml_tls_struct tls_array[GDT_ENTRY_TLS_ENTRIES];
unsigned long debugregs[8];
int debugregs_seq;
struct faultinfo faultinfo;
};
#define INIT_ARCH_THREAD { \
.tls_array = { [ 0 ... GDT_ENTRY_TLS_ENTRIES - 1 ] = \
{ .present = 0, .flushed = 0 } }, \
.debugregs = { [ 0 ... 7 ] = 0 }, \
.debugregs_seq = 0, \
.faultinfo = { 0, 0, 0 } \
}
#define STACKSLOTS_PER_LINE 8
static inline void arch_flush_thread(struct arch_thread *thread)
{
/* Clear any TLS still hanging */
memset(&thread->tls_array, 0, sizeof(thread->tls_array));
}
static inline void arch_copy_thread(struct arch_thread *from,
struct arch_thread *to)
{
memcpy(&to->tls_array, &from->tls_array, sizeof(from->tls_array));
}
/*
* Default implementation of macro that returns current
* instruction pointer ("program counter"). Stolen
* from asm-i386/processor.h
*/
#define current_text_addr() \
({ void *pc; __asm__("movl $1f,%0\n1:":"=g" (pc)); pc; })
#define current_sp() ({ void *sp; __asm__("movl %%esp, %0" : "=r" (sp) : ); sp; })
#define current_bp() ({ unsigned long bp; __asm__("movl %%ebp, %0" : "=r" (bp) : ); bp; })
#endif
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