diff options
| author | Glauber de Oliveira Costa <gcosta@redhat.com> | 2008-01-30 13:31:08 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-01-30 13:31:08 +0100 |
| commit | 0a3b4d151a8e57f50ce5a12c7ea5ec9965cf0b5a (patch) | |
| tree | d052ba5e4b35484a78d613d3af42e4026b2fc192 /include/asm-x86/system_64.h | |
| parent | 833d8469b102365f427f7791e79ec1843ff5f164 (diff) | |
x86: move switch_to macro to system.h
This patch moves the switch_to() macro to system.h
As those macros are fundamentally different between i386 and x86_64,
they are enclosed around an ifdef.
Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/asm-x86/system_64.h')
| -rw-r--r-- | include/asm-x86/system_64.h | 43 |
1 files changed, 0 insertions, 43 deletions
diff --git a/include/asm-x86/system_64.h b/include/asm-x86/system_64.h index 9def35eb75e3..97fa251ccb2b 100644 --- a/include/asm-x86/system_64.h +++ b/include/asm-x86/system_64.h @@ -4,49 +4,6 @@ #include <asm/segment.h> #include <asm/cmpxchg.h> -#ifdef __KERNEL__ - -/* entries in ARCH_DLINFO: */ -#ifdef CONFIG_IA32_EMULATION -# define AT_VECTOR_SIZE_ARCH 2 -#else -# define AT_VECTOR_SIZE_ARCH 1 -#endif - -#define __SAVE(reg,offset) "movq %%" #reg ",(14-" #offset ")*8(%%rsp)\n\t" -#define __RESTORE(reg,offset) "movq (14-" #offset ")*8(%%rsp),%%" #reg "\n\t" - -/* frame pointer must be last for get_wchan */ -#define SAVE_CONTEXT "pushf ; pushq %%rbp ; movq %%rsi,%%rbp\n\t" -#define RESTORE_CONTEXT "movq %%rbp,%%rsi ; popq %%rbp ; popf\t" - -#define __EXTRA_CLOBBER \ - ,"rcx","rbx","rdx","r8","r9","r10","r11","r12","r13","r14","r15" - -/* Save restore flags to clear handle leaking NT */ -#define switch_to(prev,next,last) \ - asm volatile(SAVE_CONTEXT \ - "movq %%rsp,%P[threadrsp](%[prev])\n\t" /* save RSP */ \ - "movq %P[threadrsp](%[next]),%%rsp\n\t" /* restore RSP */ \ - "call __switch_to\n\t" \ - ".globl thread_return\n" \ - "thread_return:\n\t" \ - "movq %%gs:%P[pda_pcurrent],%%rsi\n\t" \ - "movq %P[thread_info](%%rsi),%%r8\n\t" \ - LOCK_PREFIX "btr %[tif_fork],%P[ti_flags](%%r8)\n\t" \ - "movq %%rax,%%rdi\n\t" \ - "jc ret_from_fork\n\t" \ - RESTORE_CONTEXT \ - : "=a" (last) \ - : [next] "S" (next), [prev] "D" (prev), \ - [threadrsp] "i" (offsetof(struct task_struct, thread.sp)), \ - [ti_flags] "i" (offsetof(struct thread_info, flags)),\ - [tif_fork] "i" (TIF_FORK), \ - [thread_info] "i" (offsetof(struct task_struct, stack)), \ - [pda_pcurrent] "i" (offsetof(struct x8664_pda, pcurrent)) \ - : "memory", "cc" __EXTRA_CLOBBER) - -#endif /* __KERNEL__ */ static inline unsigned long read_cr8(void) { |