ea5e3593a4
There's only one difference between the NOPs used in asm code for i386 and x86_64: i386 has a lot more variants. The code is moved to processor.h, and adjusted accordingly. 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>
84 lines
2.2 KiB
C
84 lines
2.2 KiB
C
/*
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* Copyright (C) 1994 Linus Torvalds
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*/
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#ifndef __ASM_X86_64_PROCESSOR_H
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#define __ASM_X86_64_PROCESSOR_H
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#include <asm/segment.h>
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#include <asm/page.h>
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#include <asm/types.h>
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#include <asm/sigcontext.h>
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#include <asm/cpufeature.h>
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#include <linux/threads.h>
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#include <asm/msr.h>
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#include <asm/current.h>
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#include <asm/system.h>
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#include <linux/personality.h>
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#include <asm/desc_defs.h>
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/*
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* User space process size. 47bits minus one guard page.
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*/
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#define TASK_SIZE64 (0x800000000000UL - 4096)
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/* This decides where the kernel will search for a free chunk of vm
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* space during mmap's.
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*/
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#define IA32_PAGE_OFFSET ((current->personality & ADDR_LIMIT_3GB) ? 0xc0000000 : 0xFFFFe000)
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#define TASK_SIZE (test_thread_flag(TIF_IA32) ? IA32_PAGE_OFFSET : TASK_SIZE64)
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#define TASK_SIZE_OF(child) ((test_tsk_thread_flag(child, TIF_IA32)) ? IA32_PAGE_OFFSET : TASK_SIZE64)
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struct i387_fxsave_struct {
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u16 cwd;
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u16 swd;
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u16 twd;
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u16 fop;
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u64 rip;
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u64 rdp;
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u32 mxcsr;
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u32 mxcsr_mask;
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u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */
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u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */
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u32 padding[24];
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} __attribute__ ((aligned (16)));
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union i387_union {
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struct i387_fxsave_struct fxsave;
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};
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DECLARE_PER_CPU(struct orig_ist, orig_ist);
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#define INIT_THREAD { \
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.sp0 = (unsigned long)&init_stack + sizeof(init_stack) \
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}
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#define INIT_TSS { \
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.x86_tss.sp0 = (unsigned long)&init_stack + sizeof(init_stack) \
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}
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#define start_thread(regs,new_rip,new_rsp) do { \
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asm volatile("movl %0,%%fs; movl %0,%%es; movl %0,%%ds": :"r" (0)); \
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load_gs_index(0); \
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(regs)->ip = (new_rip); \
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(regs)->sp = (new_rsp); \
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write_pda(oldrsp, (new_rsp)); \
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(regs)->cs = __USER_CS; \
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(regs)->ss = __USER_DS; \
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(regs)->flags = 0x200; \
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set_fs(USER_DS); \
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} while(0)
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/*
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* Return saved PC of a blocked thread.
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* What is this good for? it will be always the scheduler or ret_from_fork.
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*/
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#define thread_saved_pc(t) (*(unsigned long *)((t)->thread.sp - 8))
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#define task_pt_regs(tsk) ((struct pt_regs *)(tsk)->thread.sp0 - 1)
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#define KSTK_ESP(tsk) -1 /* sorry. doesn't work for syscall. */
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#endif /* __ASM_X86_64_PROCESSOR_H */
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