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x86: x86 user_regset cleanup

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This removes a bunch of dead code that is no longer needed now
that the user_regset interfaces are being used for all these jobs.

Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Roland McGrath
2008-01-30 13:31:55 +01:00
committed by Ingo Molnar
parent 5a4646a4ef
commit 60b3b9af35
7 changed files with 9 additions and 232 deletions
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105
arch/x86/kernel/i387.c
View File

@@ -454,113 +454,26 @@ int restore_i387_ia32(struct _fpstate_ia32 __user *buf)
return err;
}
#endif /* CONFIG_X86_32 || CONFIG_IA32_EMULATION */
#ifdef CONFIG_X86_64
int get_fpregs(struct user_i387_struct __user *buf, struct task_struct *tsk)
{
return xfpregs_get(tsk, NULL, 0, sizeof(*buf), NULL, buf);
}
int set_fpregs(struct task_struct *tsk, struct user_i387_struct __user *buf)
{
return xfpregs_set(tsk, NULL, 0, sizeof(*buf), NULL, buf);
}
#else
int get_fpregs(struct user_i387_struct __user *buf, struct task_struct *tsk)
{
return fpregs_get(tsk, NULL, 0, sizeof(*buf), NULL, buf);
}
int set_fpregs(struct task_struct *tsk, struct user_i387_struct __user *buf)
{
return fpregs_set(tsk, NULL, 0, sizeof(*buf), NULL, buf);
}
int get_fpxregs(struct user_fxsr_struct __user *buf, struct task_struct *tsk)
{
return xfpregs_get(tsk, NULL, 0, sizeof(*buf), NULL, buf);
}
int set_fpxregs(struct task_struct *tsk, struct user_fxsr_struct __user *buf)
{
return xfpregs_get(tsk, NULL, 0, sizeof(*buf), NULL, buf);
}
#endif
/*
* FPU state for core dumps.
* This is only used for a.out dumps now.
* It is declared generically using elf_fpregset_t (which is
* struct user_i387_struct) but is in fact only used for 32-bit
* dumps, so on 64-bit it is really struct user_i387_ia32_struct.
*/
static inline void copy_fpu_fsave(struct task_struct *tsk,
struct user_i387_struct *fpu)
{
memcpy(fpu, &tsk->thread.i387.fsave,
sizeof(struct user_i387_struct));
}
static inline void copy_fpu_fxsave(struct task_struct *tsk,
struct user_i387_struct *fpu)
{
unsigned short *to;
unsigned short *from;
int i;
memcpy(fpu, &tsk->thread.i387.fxsave, 7 * sizeof(long));
to = (unsigned short *)&fpu->st_space[0];
from = (unsigned short *)&tsk->thread.i387.fxsave.st_space[0];
for (i = 0; i < 8; i++, to += 5, from += 8)
memcpy(to, from, 5 * sizeof(unsigned short));
}
int dump_fpu(struct pt_regs *regs, struct user_i387_struct *fpu)
{
int fpvalid;
struct task_struct *tsk = current;
fpvalid = !!used_math();
if (fpvalid) {
unlazy_fpu(tsk);
if (cpu_has_fxsr) {
copy_fpu_fxsave(tsk, fpu);
} else {
copy_fpu_fsave(tsk, fpu);
}
}
if (fpvalid)
fpvalid = !fpregs_get(tsk, NULL,
0, sizeof(struct user_i387_ia32_struct),
fpu, NULL);
return fpvalid;
}
EXPORT_SYMBOL(dump_fpu);
int dump_task_fpu(struct task_struct *tsk, struct user_i387_struct *fpu)
{
int fpvalid = !!tsk_used_math(tsk);
if (fpvalid) {
if (tsk == current)
unlazy_fpu(tsk);
if (cpu_has_fxsr)
copy_fpu_fxsave(tsk, fpu);
else
copy_fpu_fsave(tsk, fpu);
}
return fpvalid;
}
int dump_task_extended_fpu(struct task_struct *tsk,
struct user32_fxsr_struct *fpu)
{
int fpvalid = tsk_used_math(tsk) && cpu_has_fxsr;
if (fpvalid) {
if (tsk == current)
unlazy_fpu(tsk);
memcpy(fpu, &tsk->thread.i387.fxsave, sizeof(*fpu));
}
return fpvalid;
}
#endif /* CONFIG_X86_32 || CONFIG_IA32_EMULATION */

16
arch/x86/kernel/process_32.c
View File

@@ -571,22 +571,6 @@ void dump_thread(struct pt_regs * regs, struct user * dump)
}
EXPORT_SYMBOL(dump_thread);
/*
* Capture the user space registers if the task is not running (in user space)
*/
int dump_task_regs(struct task_struct *tsk, elf_gregset_t *regs)
{
struct pt_regs ptregs = *task_pt_regs(tsk);
ptregs.cs &= 0xffff;
ptregs.ds &= 0xffff;
ptregs.es &= 0xffff;
ptregs.ss &= 0xffff;
elf_core_copy_regs(regs, &ptregs);
return 1;
}
#ifdef CONFIG_SECCOMP
static void hard_disable_TSC(void)
{

19
arch/x86/kernel/process_64.c
View File

@@ -544,24 +544,6 @@ out:
*/
#define loaddebug(thread, r) set_debugreg(thread->debugreg ## r, r)
/*
* Capture the user space registers if the task is not running (in user space)
*/
int dump_task_regs(struct task_struct *tsk, elf_gregset_t *regs)
{
struct pt_regs *pp, ptregs;
pp = task_pt_regs(tsk);
ptregs = *pp;
ptregs.cs &= 0xffff;
ptregs.ss &= 0xffff;
elf_core_copy_regs(regs, &ptregs);
return 1;
}
static inline void __switch_to_xtra(struct task_struct *prev_p,
struct task_struct *next_p,
struct tss_struct *tss)
@@ -929,4 +911,3 @@ unsigned long arch_randomize_brk(struct mm_struct *mm)
unsigned long range_end = mm->brk + 0x02000000;
return randomize_range(mm->brk, range_end, 0) ? : mm->brk;
}