Merge branch 'x86/core' into x86/headers

4 files changed, 46 insertions, 55 deletions

diff --git a/arch/x86/math-emu/fpu_entry.c b/arch/x86/math-emu/fpu_entry.c
index c7b06fe..5d87f58 100644
--- a/arch/x86/math-emu/fpu_entry.c
+++ b/arch/x86/math-emu/fpu_entry.c
@@ -131,7 +131,7 @@ u_char emulating = 0;
 static int valid_prefix(u_char *Byte, u_char __user ** fpu_eip,
 			overrides * override);
 
-asmlinkage void math_emulate(long arg)
+void math_emulate(struct math_emu_info *info)
 {
 	u_char FPU_modrm, byte1;
 	unsigned short code;
@@ -161,7 +161,7 @@ asmlinkage void math_emulate(long arg)
 	RE_ENTRANT_CHECK_ON;
 #endif /* RE_ENTRANT_CHECKING */
 
-	SETUP_DATA_AREA(arg);
+	FPU_info = info;
 
 	FPU_ORIG_EIP = FPU_EIP;
 
@@ -659,7 +659,7 @@ static int valid_prefix(u_char *Byte, u_char __user **fpu_eip,
 	}
 }
 
-void math_abort(struct info *info, unsigned int signal)
+void math_abort(struct math_emu_info *info, unsigned int signal)
 {
 	FPU_EIP = FPU_ORIG_EIP;
 	current->thread.trap_no = 16;
diff --git a/arch/x86/math-emu/fpu_proto.h b/arch/x86/math-emu/fpu_proto.h
index aa49b6a..9779df4 100644
--- a/arch/x86/math-emu/fpu_proto.h
+++ b/arch/x86/math-emu/fpu_proto.h
@@ -51,8 +51,8 @@ extern void ffreep(void);
 extern void fst_i_(void);
 extern void fstp_i(void);
 /* fpu_entry.c */
-asmlinkage extern void math_emulate(long arg);
-extern void math_abort(struct info *info, unsigned int signal);
+extern void math_emulate(struct math_emu_info *info);
+extern void math_abort(struct math_emu_info *info, unsigned int signal);
 /* fpu_etc.c */
 extern void FPU_etc(void);
 /* fpu_tags.c */
diff --git a/arch/x86/math-emu/fpu_system.h b/arch/x86/math-emu/fpu_system.h
index 13488fa..50fa0ec 100644
--- a/arch/x86/math-emu/fpu_system.h
+++ b/arch/x86/math-emu/fpu_system.h
@@ -16,10 +16,6 @@
 #include <linux/kernel.h>
 #include <linux/mm.h>
 
-/* This sets the pointer FPU_info to point to the argument part
-   of the stack frame of math_emulate() */
-#define SETUP_DATA_AREA(arg)	FPU_info = (struct info *) &arg
-
 /* s is always from a cpu register, and the cpu does bounds checking
  * during register load --> no further bounds checks needed */
 #define LDT_DESCRIPTOR(s)	(((struct desc_struct *)current->mm->context.ldt)[(s) >> 3])
@@ -38,12 +34,12 @@
 #define I387			(current->thread.xstate)
 #define FPU_info		(I387->soft.info)
 
-#define FPU_CS			(*(unsigned short *) &(FPU_info->___cs))
-#define FPU_SS			(*(unsigned short *) &(FPU_info->___ss))
-#define FPU_DS			(*(unsigned short *) &(FPU_info->___ds))
-#define FPU_EAX			(FPU_info->___eax)
-#define FPU_EFLAGS		(FPU_info->___eflags)
-#define FPU_EIP			(FPU_info->___eip)
+#define FPU_CS			(*(unsigned short *) &(FPU_info->regs->cs))
+#define FPU_SS			(*(unsigned short *) &(FPU_info->regs->ss))
+#define FPU_DS			(*(unsigned short *) &(FPU_info->regs->ds))
+#define FPU_EAX			(FPU_info->regs->ax)
+#define FPU_EFLAGS		(FPU_info->regs->flags)
+#define FPU_EIP			(FPU_info->regs->ip)
 #define FPU_ORIG_EIP		(FPU_info->___orig_eip)
 
 #define FPU_lookahead           (I387->soft.lookahead)
diff --git a/arch/x86/math-emu/get_address.c b/arch/x86/math-emu/get_address.c
index d701e2b..6ef5e99 100644
--- a/arch/x86/math-emu/get_address.c
+++ b/arch/x86/math-emu/get_address.c
@@ -29,46 +29,43 @@
 #define FPU_WRITE_BIT 0x10
 
 static int reg_offset[] = {
-	offsetof(struct info, ___eax),
-	offsetof(struct info, ___ecx),
-	offsetof(struct info, ___edx),
-	offsetof(struct info, ___ebx),
-	offsetof(struct info, ___esp),
-	offsetof(struct info, ___ebp),
-	offsetof(struct info, ___esi),
-	offsetof(struct info, ___edi)
+	offsetof(struct pt_regs, ax),
+	offsetof(struct pt_regs, cx),
+	offsetof(struct pt_regs, dx),
+	offsetof(struct pt_regs, bx),
+	offsetof(struct pt_regs, sp),
+	offsetof(struct pt_regs, bp),
+	offsetof(struct pt_regs, si),
+	offsetof(struct pt_regs, di)
 };
 
-#define REG_(x) (*(long *)(reg_offset[(x)]+(u_char *) FPU_info))
+#define REG_(x) (*(long *)(reg_offset[(x)] + (u_char *)FPU_info->regs))
 
 static int reg_offset_vm86[] = {
-	offsetof(struct info, ___cs),
-	offsetof(struct info, ___vm86_ds),
-	offsetof(struct info, ___vm86_es),
-	offsetof(struct info, ___vm86_fs),
-	offsetof(struct info, ___vm86_gs),
-	offsetof(struct info, ___ss),
-	offsetof(struct info, ___vm86_ds)
+	offsetof(struct pt_regs, cs),
+	offsetof(struct kernel_vm86_regs, ds),
+	offsetof(struct kernel_vm86_regs, es),
+	offsetof(struct kernel_vm86_regs, fs),
+	offsetof(struct kernel_vm86_regs, gs),
+	offsetof(struct pt_regs, ss),
+	offsetof(struct kernel_vm86_regs, ds)
 };
 
 #define VM86_REG_(x) (*(unsigned short *) \
-		      (reg_offset_vm86[((unsigned)x)]+(u_char *) FPU_info))
-
-/* This dummy, gs is not saved on the stack. */
-#define ___GS ___ds
+		(reg_offset_vm86[((unsigned)x)] + (u_char *)FPU_info->regs))
 
 static int reg_offset_pm[] = {
-	offsetof(struct info, ___cs),
-	offsetof(struct info, ___ds),
-	offsetof(struct info, ___es),
-	offsetof(struct info, ___fs),
-	offsetof(struct info, ___GS),
-	offsetof(struct info, ___ss),
-	offsetof(struct info, ___ds)
+	offsetof(struct pt_regs, cs),
+	offsetof(struct pt_regs, ds),
+	offsetof(struct pt_regs, es),
+	offsetof(struct pt_regs, fs),
+	offsetof(struct pt_regs, ds),	/* dummy, not saved on stack */
+	offsetof(struct pt_regs, ss),
+	offsetof(struct pt_regs, ds)
 };
 
 #define PM_REG_(x) (*(unsigned short *) \
-		      (reg_offset_pm[((unsigned)x)]+(u_char *) FPU_info))
+		(reg_offset_pm[((unsigned)x)] + (u_char *)FPU_info->regs))
 
 /* Decode the SIB byte. This function assumes mod != 0 */
 static int sib(int mod, unsigned long *fpu_eip)
@@ -153,11 +150,9 @@ static long pm_address(u_char FPU_modrm, u_char segment,
 #endif /* PARANOID */
 
 	switch (segment) {
-		/* gs isn't used by the kernel, so it still has its
-		   user-space value. */
 	case PREFIX_GS_ - 1:
-		/* N.B. - movl %seg, mem is a 2 byte write regardless of prefix */
-		savesegment(gs, addr->selector);
+		/* user gs handling can be lazy, use special accessors */
+		addr->selector = get_user_gs(FPU_info->regs);
 		break;
 	default:
 		addr->selector = PM_REG_(segment);
@@ -349,34 +344,34 @@ void __user *FPU_get_address_16(u_char FPU_modrm, unsigned long *fpu_eip,
 	}
 	switch (rm) {
 	case 0:
-		address += FPU_info->___ebx + FPU_info->___esi;
+		address += FPU_info->regs->bx + FPU_info->regs->si;
 		break;
 	case 1:
-		address += FPU_info->___ebx + FPU_info->___edi;
+		address += FPU_info->regs->bx + FPU_info->regs->di;
 		break;
 	case 2:
-		address += FPU_info->___ebp + FPU_info->___esi;
+		address += FPU_info->regs->bp + FPU_info->regs->si;
 		if (addr_modes.override.segment == PREFIX_DEFAULT)
 			addr_modes.override.segment = PREFIX_SS_;
 		break;
 	case 3:
-		address += FPU_info->___ebp + FPU_info->___edi;
+		address += FPU_info->regs->bp + FPU_info->regs->di;
 		if (addr_modes.override.segment == PREFIX_DEFAULT)
 			addr_modes.override.segment = PREFIX_SS_;
 		break;
 	case 4:
-		address += FPU_info->___esi;
+		address += FPU_info->regs->si;
 		break;
 	case 5:
-		address += FPU_info->___edi;
+		address += FPU_info->regs->di;
 		break;
 	case 6:
-		address += FPU_info->___ebp;
+		address += FPU_info->regs->bp;
 		if (addr_modes.override.segment == PREFIX_DEFAULT)
 			addr_modes.override.segment = PREFIX_SS_;
 		break;
 	case 7:
-		address += FPU_info->___ebx;
+		address += FPU_info->regs->bx;
 		break;
 	}