diff options
Diffstat (limited to 'arch/um/sys-i386/asm/processor.h')
| -rw-r--r-- | arch/um/sys-i386/asm/processor.h | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/arch/um/sys-i386/asm/processor.h b/arch/um/sys-i386/asm/processor.h new file mode 100644 index 00000000000..82a9061ab5b --- /dev/null +++ b/arch/um/sys-i386/asm/processor.h @@ -0,0 +1,78 @@ +/* + * 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 <sysdep/host_ldt.h> +#include "asm/segment.h" + +extern int host_has_cmov; + +/* include faultinfo structure */ +#include "sysdep/faultinfo.h" + +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 } \ +} + +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)); +} + +#include <asm/user.h> + +/* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */ +static inline void rep_nop(void) +{ + __asm__ __volatile__("rep;nop": : :"memory"); +} + +#define cpu_relax() rep_nop() + +/* + * 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 ARCH_IS_STACKGROW(address) \ + (address + 32 >= UPT_SP(¤t->thread.regs.regs)) + +#define KSTK_EIP(tsk) KSTK_REG(tsk, EIP) +#define KSTK_ESP(tsk) KSTK_REG(tsk, UESP) +#define KSTK_EBP(tsk) KSTK_REG(tsk, EBP) + +#include "asm/processor-generic.h" + +#endif |