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Subject[PATCH -mm 39/43] x86 user_regset cleanup
Date
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>
---
arch/x86/kernel/i387.c | 105 ++++-------------------------------------
arch/x86/kernel/process_32.c | 16 ------
arch/x86/kernel/process_64.c | 19 -------
arch/x86/math-emu/fpu_entry.c | 14 ------
include/asm-x86/elf.h | 68 --------------------------
include/asm-x86/i387.h | 14 ------
include/asm-x86/math_emu.h | 5 --
7 files changed, 9 insertions(+), 232 deletions(-)
diff --git a/arch/x86/kernel/i387.c b/arch/x86/kernel/i387.c
index f0563ed..7e354a3 100644
--- a/arch/x86/kernel/i387.c
+++ b/arch/x86/kernel/i387.c
@@ -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 */
diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c
index 1a77643..655902c 100644
--- a/arch/x86/kernel/process_32.c
+++ b/arch/x86/kernel/process_32.c
@@ -560,22 +560,6 @@ 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)
{
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index c846108..c6ad1a0 100644
--- a/arch/x86/kernel/process_64.c
+++ b/arch/x86/kernel/process_64.c
@@ -533,24 +533,6 @@ 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)
@@ -918,4 +900,3 @@ 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;
}
-
diff --git a/arch/x86/math-emu/fpu_entry.c b/arch/x86/math-emu/fpu_entry.c
index cfbdaa1..760baee 100644
--- a/arch/x86/math-emu/fpu_entry.c
+++ b/arch/x86/math-emu/fpu_entry.c
@@ -761,17 +761,3 @@ int fpregs_soft_get(struct task_struct *target,

return ret;
}
-
-int save_i387_soft(void *s387, struct _fpstate __user *buf)
-{
- return fpregs_soft_get(current, NULL,
- 0, sizeof(struct user_i387_struct),
- NULL, buf) ? -1 : 1;
-}
-
-int restore_i387_soft(void *s387, struct _fpstate __user *buf)
-{
- return fpregs_soft_set(current, NULL,
- 0, sizeof(struct user_i387_struct),
- NULL, buf) ? -1 : 1;
-}
diff --git a/include/asm-x86/elf.h b/include/asm-x86/elf.h
index 123e2d5..d6bf742 100644
--- a/include/asm-x86/elf.h
+++ b/include/asm-x86/elf.h
@@ -104,28 +104,6 @@ typedef struct user_fxsr_struct elf_fpxregset_t;
_r->ax = 0; \
} while (0)

-/* regs is struct pt_regs, pr_reg is elf_gregset_t (which is
- now struct_user_regs, they are different) */
-
-#define ELF_CORE_COPY_REGS(pr_reg, regs) \
- pr_reg[0] = regs->bx; \
- pr_reg[1] = regs->cx; \
- pr_reg[2] = regs->dx; \
- pr_reg[3] = regs->si; \
- pr_reg[4] = regs->di; \
- pr_reg[5] = regs->bp; \
- pr_reg[6] = regs->ax; \
- pr_reg[7] = regs->ds & 0xffff; \
- pr_reg[8] = regs->es & 0xffff; \
- pr_reg[9] = regs->fs & 0xffff; \
- savesegment(gs,pr_reg[10]); \
- pr_reg[11] = regs->orig_ax; \
- pr_reg[12] = regs->ip; \
- pr_reg[13] = regs->cs & 0xffff; \
- pr_reg[14] = regs->flags; \
- pr_reg[15] = regs->sp; \
- pr_reg[16] = regs->ss & 0xffff;
-
#define ELF_PLATFORM (utsname()->machine)
#define set_personality_64bit() do { } while (0)
extern unsigned int vdso_enabled;
@@ -159,41 +137,6 @@ extern unsigned int vdso_enabled;
clear_thread_flag(TIF_IA32); \
} while (0)

-/* regs is struct pt_regs, pr_reg is elf_gregset_t (which is
- now struct_user_regs, they are different). Assumes current is the process
- getting dumped. */
-
-#define ELF_CORE_COPY_REGS(pr_reg, regs) do { \
- unsigned v; \
- (pr_reg)[0] = (regs)->r15; \
- (pr_reg)[1] = (regs)->r14; \
- (pr_reg)[2] = (regs)->r13; \
- (pr_reg)[3] = (regs)->r12; \
- (pr_reg)[4] = (regs)->bp; \
- (pr_reg)[5] = (regs)->bx; \
- (pr_reg)[6] = (regs)->r11; \
- (pr_reg)[7] = (regs)->r10; \
- (pr_reg)[8] = (regs)->r9; \
- (pr_reg)[9] = (regs)->r8; \
- (pr_reg)[10] = (regs)->ax; \
- (pr_reg)[11] = (regs)->cx; \
- (pr_reg)[12] = (regs)->dx; \
- (pr_reg)[13] = (regs)->si; \
- (pr_reg)[14] = (regs)->di; \
- (pr_reg)[15] = (regs)->orig_ax; \
- (pr_reg)[16] = (regs)->ip; \
- (pr_reg)[17] = (regs)->cs; \
- (pr_reg)[18] = (regs)->flags; \
- (pr_reg)[19] = (regs)->sp; \
- (pr_reg)[20] = (regs)->ss; \
- (pr_reg)[21] = current->thread.fs; \
- (pr_reg)[22] = current->thread.gs; \
- asm("movl %%ds,%0" : "=r" (v)); (pr_reg)[23] = v; \
- asm("movl %%es,%0" : "=r" (v)); (pr_reg)[24] = v; \
- asm("movl %%fs,%0" : "=r" (v)); (pr_reg)[25] = v; \
- asm("movl %%gs,%0" : "=r" (v)); (pr_reg)[26] = v; \
-} while(0);
-
/* I'm not sure if we can use '-' here */
#define ELF_PLATFORM ("x86_64")
extern void set_personality_64bit(void);
@@ -236,18 +179,7 @@ extern int vdso_enabled;

struct task_struct;

-extern int dump_task_regs (struct task_struct *, elf_gregset_t *);
-extern int dump_task_fpu (struct task_struct *, elf_fpregset_t *);
-
-#define ELF_CORE_COPY_TASK_REGS(tsk, elf_regs) dump_task_regs(tsk, elf_regs)
-#define ELF_CORE_COPY_FPREGS(tsk, elf_fpregs) dump_task_fpu(tsk, elf_fpregs)
-
#ifdef CONFIG_X86_32
-extern int dump_task_extended_fpu (struct task_struct *,
- struct user_fxsr_struct *);
-#define ELF_CORE_COPY_XFPREGS(tsk, elf_xfpregs) \
- dump_task_extended_fpu(tsk, elf_xfpregs)
-#define ELF_CORE_XFPREG_TYPE NT_PRXFPREG

#define VDSO_HIGH_BASE (__fix_to_virt(FIX_VDSO))

diff --git a/include/asm-x86/i387.h b/include/asm-x86/i387.h
index b52b891..3f4c4a5 100644
--- a/include/asm-x86/i387.h
+++ b/include/asm-x86/i387.h
@@ -322,20 +322,6 @@ static inline void clear_fpu(struct task_struct *tsk)
#endif /* CONFIG_X86_64 */

/*
- * ptrace request handlers...
- */
-extern int get_fpregs(struct user_i387_struct __user *buf,
- struct task_struct *tsk);
-extern int set_fpregs(struct task_struct *tsk,
- struct user_i387_struct __user *buf);
-
-struct user_fxsr_struct;
-extern int get_fpxregs(struct user_fxsr_struct __user *buf,
- struct task_struct *tsk);
-extern int set_fpxregs(struct task_struct *tsk,
- struct user_fxsr_struct __user *buf);
-
-/*
* i387 state interaction
*/
static inline unsigned short get_fpu_cwd(struct task_struct *tsk)
diff --git a/include/asm-x86/math_emu.h b/include/asm-x86/math_emu.h
index a4b0aa3..9bf4ae9 100644
--- a/include/asm-x86/math_emu.h
+++ b/include/asm-x86/math_emu.h
@@ -1,11 +1,6 @@
#ifndef _I386_MATH_EMU_H
#define _I386_MATH_EMU_H

-#include <asm/sigcontext.h>
-
-int restore_i387_soft(void *s387, struct _fpstate __user *buf);
-int save_i387_soft(void *s387, struct _fpstate __user *buf);
-
/* This structure matches the layout of the data saved to the stack
following a device-not-present interrupt, part of it saved
automatically by the 80386/80486.
--
1.5.3.6


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