x86: rename the struct pt_regs members for 32/64-bit consistency

We have a lot of code which differs only by the naming of specific
members of structures that contain registers.  In order to enable
additional unifications, this patch drops the e- or r- size prefix
from the register names in struct pt_regs, and drops the x- prefixes
for segment registers on the 32-bit side.

This patch also performs the equivalent renames in some additional
places that might be candidates for unification in the future.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

arch/x86/ia32/ia32_aout.c

@@ -53,7 +53,7 @@ static void dump_thread32(struct pt_regs *regs, struct user32 *dump)
 /* changed the size calculations - should hopefully work better. lbt */
 	dump->magic = CMAGIC;
 	dump->start_code = 0;
-	dump->start_stack = regs->rsp & ~(PAGE_SIZE - 1);
+	dump->start_stack = regs->sp & ~(PAGE_SIZE - 1);
 	dump->u_tsize = ((unsigned long) current->mm->end_code) >> PAGE_SHIFT;
 	dump->u_dsize = ((unsigned long)
 			 (current->mm->brk + (PAGE_SIZE-1))) >> PAGE_SHIFT;
@@ -75,22 +75,22 @@ static void dump_thread32(struct pt_regs *regs, struct user32 *dump)
 		dump->u_ssize = tmp >> PAGE_SHIFT;
 	}
 
-	dump->regs.ebx = regs->rbx;
+	dump->regs.bx = regs->bx;
-	dump->regs.ecx = regs->rcx;
+	dump->regs.cx = regs->cx;
-	dump->regs.edx = regs->rdx;
+	dump->regs.dx = regs->dx;
-	dump->regs.esi = regs->rsi;
+	dump->regs.si = regs->si;
-	dump->regs.edi = regs->rdi;
+	dump->regs.di = regs->di;
-	dump->regs.ebp = regs->rbp;
+	dump->regs.bp = regs->bp;
-	dump->regs.eax = regs->rax;
+	dump->regs.ax = regs->ax;
 	dump->regs.ds = current->thread.ds;
 	dump->regs.es = current->thread.es;
 	asm("movl %%fs,%0" : "=r" (fs)); dump->regs.fs = fs;
 	asm("movl %%gs,%0" : "=r" (gs)); dump->regs.gs = gs;
-	dump->regs.orig_eax = regs->orig_rax;
+	dump->regs.orig_ax = regs->orig_ax;
-	dump->regs.eip = regs->rip;
+	dump->regs.ip = regs->ip;
 	dump->regs.cs = regs->cs;
-	dump->regs.eflags = regs->eflags;
+	dump->regs.flags = regs->flags;
-	dump->regs.esp = regs->rsp;
+	dump->regs.sp = regs->sp;
 	dump->regs.ss = regs->ss;
 
 #if 1 /* FIXME */
@@ -432,9 +432,9 @@ beyond_if:
 	asm volatile("movl %0,%%fs" :: "r" (0)); \
 	asm volatile("movl %0,%%es; movl %0,%%ds": :"r" (__USER32_DS));
 	load_gs_index(0);
-	(regs)->rip = ex.a_entry;
+	(regs)->ip = ex.a_entry;
-	(regs)->rsp = current->mm->start_stack;
+	(regs)->sp = current->mm->start_stack;
-	(regs)->eflags = 0x200;
+	(regs)->flags = 0x200;
 	(regs)->cs = __USER32_CS;
 	(regs)->ss = __USER32_DS;
 	regs->r8 = regs->r9 = regs->r10 = regs->r11 =

arch/x86/ia32/ia32_binfmt.c

@@ -73,22 +73,22 @@ struct file;
 /* Assumes current==process to be dumped */
 #undef	ELF_CORE_COPY_REGS
 #define ELF_CORE_COPY_REGS(pr_reg, regs)       		\
-	pr_reg[0] = regs->rbx;				\
+	pr_reg[0] = regs->bx;				\
-	pr_reg[1] = regs->rcx;				\
+	pr_reg[1] = regs->cx;				\
-	pr_reg[2] = regs->rdx;				\
+	pr_reg[2] = regs->dx;				\
-	pr_reg[3] = regs->rsi;				\
+	pr_reg[3] = regs->si;				\
-	pr_reg[4] = regs->rdi;				\
+	pr_reg[4] = regs->di;				\
-	pr_reg[5] = regs->rbp;				\
+	pr_reg[5] = regs->bp;				\
-	pr_reg[6] = regs->rax;				\
+	pr_reg[6] = regs->ax;				\
 	pr_reg[7] = _GET_SEG(ds);   			\
 	pr_reg[8] = _GET_SEG(es);			\
 	pr_reg[9] = _GET_SEG(fs);			\
 	pr_reg[10] = _GET_SEG(gs);			\
-	pr_reg[11] = regs->orig_rax;			\
+	pr_reg[11] = regs->orig_ax;			\
-	pr_reg[12] = regs->rip;				\
+	pr_reg[12] = regs->ip;				\
 	pr_reg[13] = regs->cs;				\
-	pr_reg[14] = regs->eflags;			\
+	pr_reg[14] = regs->flags;			\
-	pr_reg[15] = regs->rsp;				\
+	pr_reg[15] = regs->sp;				\
 	pr_reg[16] = regs->ss;
 
 
@@ -205,9 +205,9 @@ do {							\
 	asm volatile("movl %0,%%fs" :: "r" (0)); \
 	asm volatile("movl %0,%%es; movl %0,%%ds": :"r" (__USER32_DS)); \
 	load_gs_index(0); \
-	(regs)->rip = (new_rip); \
+	(regs)->ip = (new_rip); \
-	(regs)->rsp = (new_rsp); \
+	(regs)->sp = (new_rsp); \
-	(regs)->eflags = 0x200; \
+	(regs)->flags = X86_EFLAGS_IF; \
 	(regs)->cs = __USER32_CS; \
 	(regs)->ss = __USER32_DS; \
 	set_fs(USER_DS); \
@@ -233,13 +233,13 @@ extern int syscall32_setup_pages(struct linux_binprm *, int exstack);
 static void elf32_init(struct pt_regs *regs)
 {
 	struct task_struct *me = current; 
-	regs->rdi = 0;
+	regs->di = 0;
-	regs->rsi = 0;
+	regs->si = 0;
-	regs->rdx = 0;
+	regs->dx = 0;
-	regs->rcx = 0;
+	regs->cx = 0;
-	regs->rax = 0;
+	regs->ax = 0;
-	regs->rbx = 0; 
+	regs->bx = 0;
-	regs->rbp = 0; 
+	regs->bp = 0;
 	regs->r8 = regs->r9 = regs->r10 = regs->r11 = regs->r12 =
 		regs->r13 = regs->r14 = regs->r15 = 0; 
     me->thread.fs = 0; 

arch/x86/ia32/ia32_signal.c

@@ -154,7 +154,7 @@ asmlinkage long sys32_sigaltstack(const stack_ia32_t __user *uss_ptr,
 	}
 	seg = get_fs();
 	set_fs(KERNEL_DS);
-	ret = do_sigaltstack(uss_ptr ? &uss : NULL, &uoss, regs->rsp);
+	ret = do_sigaltstack(uss_ptr ? &uss : NULL, &uoss, regs->sp);
 	set_fs(seg);
 	if (ret >= 0 && uoss_ptr)  {
 		if (!access_ok(VERIFY_WRITE, uoss_ptr, sizeof(stack_ia32_t)) ||
@@ -195,7 +195,7 @@ struct rt_sigframe
 #define COPY(x)		{ \
 	unsigned int reg;			\
 	err |= __get_user(reg, &sc->e ##x);	\
-	regs->r ## x = reg;			\
+	regs->x = reg;			\
 }
 
 #define RELOAD_SEG(seg,mask)						\
@@ -220,7 +220,7 @@ static int ia32_restore_sigcontext(struct pt_regs *regs,
 #if DEBUG_SIG
 	printk(KERN_DEBUG "SIG restore_sigcontext: "
 	       "sc=%p err(%x) eip(%x) cs(%x) flg(%x)\n",
-	       sc, sc->err, sc->eip, sc->cs, sc->eflags);
+	       sc, sc->err, sc->ip, sc->cs, sc->flags);
 #endif
 
 	/*
@@ -249,9 +249,9 @@ static int ia32_restore_sigcontext(struct pt_regs *regs,
 	regs->ss |= 3;
 
 	err |= __get_user(tmpflags, &sc->eflags);
-	regs->eflags = (regs->eflags & ~0x40DD5) | (tmpflags & 0x40DD5);
+	regs->flags = (regs->flags & ~0x40DD5) | (tmpflags & 0x40DD5);
 	/* disable syscall checks */
-	regs->orig_rax = -1;
+	regs->orig_ax = -1;
 
 	err |= __get_user(tmp, &sc->fpstate);
 	buf = compat_ptr(tmp);
@@ -279,9 +279,9 @@ badframe:
 
 asmlinkage long sys32_sigreturn(struct pt_regs *regs)
 {
-	struct sigframe __user *frame = (struct sigframe __user *)(regs->rsp-8);
+	struct sigframe __user *frame = (struct sigframe __user *)(regs->sp-8);
 	sigset_t set;
-	unsigned int eax;
+	unsigned int ax;
 
 	if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
 		goto badframe;
@@ -298,9 +298,9 @@ asmlinkage long sys32_sigreturn(struct pt_regs *regs)
 	recalc_sigpending();
 	spin_unlock_irq(&current->sighand->siglock);
 
-	if (ia32_restore_sigcontext(regs, &frame->sc, &eax))
+	if (ia32_restore_sigcontext(regs, &frame->sc, &ax))
 		goto badframe;
-	return eax;
+	return ax;
 
 badframe:
 	signal_fault(regs, frame, "32bit sigreturn");
@@ -311,10 +311,10 @@ asmlinkage long sys32_rt_sigreturn(struct pt_regs *regs)
 {
 	struct rt_sigframe __user *frame;
 	sigset_t set;
-	unsigned int eax;
+	unsigned int ax;
 	struct pt_regs tregs;
 
-	frame = (struct rt_sigframe __user *)(regs->rsp - 4);
+	frame = (struct rt_sigframe __user *)(regs->sp - 4);
 
 	if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
 		goto badframe;
@@ -327,14 +327,14 @@ asmlinkage long sys32_rt_sigreturn(struct pt_regs *regs)
 	recalc_sigpending();
 	spin_unlock_irq(&current->sighand->siglock);
 
-	if (ia32_restore_sigcontext(regs, &frame->uc.uc_mcontext, &eax))
+	if (ia32_restore_sigcontext(regs, &frame->uc.uc_mcontext, &ax))
 		goto badframe;
 
 	tregs = *regs;
 	if (sys32_sigaltstack(&frame->uc.uc_stack, NULL, &tregs) == -EFAULT)
 		goto badframe;
 
-	return eax;
+	return ax;
 
 badframe:
 	signal_fault(regs, frame, "32bit rt sigreturn");
@@ -361,21 +361,21 @@ static int ia32_setup_sigcontext(struct sigcontext_ia32 __user *sc,
 	__asm__("movl %%es,%0" : "=r"(tmp): "0"(tmp));
 	err |= __put_user(tmp, (unsigned int __user *)&sc->es);
 
-	err |= __put_user((u32)regs->rdi, &sc->edi);
+	err |= __put_user((u32)regs->di, &sc->edi);
-	err |= __put_user((u32)regs->rsi, &sc->esi);
+	err |= __put_user((u32)regs->si, &sc->esi);
-	err |= __put_user((u32)regs->rbp, &sc->ebp);
+	err |= __put_user((u32)regs->bp, &sc->ebp);
-	err |= __put_user((u32)regs->rsp, &sc->esp);
+	err |= __put_user((u32)regs->sp, &sc->esp);
-	err |= __put_user((u32)regs->rbx, &sc->ebx);
+	err |= __put_user((u32)regs->bx, &sc->ebx);
-	err |= __put_user((u32)regs->rdx, &sc->edx);
+	err |= __put_user((u32)regs->dx, &sc->edx);
-	err |= __put_user((u32)regs->rcx, &sc->ecx);
+	err |= __put_user((u32)regs->cx, &sc->ecx);
-	err |= __put_user((u32)regs->rax, &sc->eax);
+	err |= __put_user((u32)regs->ax, &sc->eax);
 	err |= __put_user((u32)regs->cs, &sc->cs);
 	err |= __put_user((u32)regs->ss, &sc->ss);
 	err |= __put_user(current->thread.trap_no, &sc->trapno);
 	err |= __put_user(current->thread.error_code, &sc->err);
-	err |= __put_user((u32)regs->rip, &sc->eip);
+	err |= __put_user((u32)regs->ip, &sc->eip);
-	err |= __put_user((u32)regs->eflags, &sc->eflags);
+	err |= __put_user((u32)regs->flags, &sc->eflags);
-	err |= __put_user((u32)regs->rsp, &sc->esp_at_signal);
+	err |= __put_user((u32)regs->sp, &sc->esp_at_signal);
 
 	tmp = save_i387_ia32(current, fpstate, regs, 0);
 	if (tmp < 0)
@@ -400,28 +400,28 @@ static int ia32_setup_sigcontext(struct sigcontext_ia32 __user *sc,
 static void __user *get_sigframe(struct k_sigaction *ka, struct pt_regs *regs,
 				 size_t frame_size)
 {
-	unsigned long rsp;
+	unsigned long sp;
 
 	/* Default to using normal stack */
-	rsp = regs->rsp;
+	sp = regs->sp;
 
 	/* This is the X/Open sanctioned signal stack switching.  */
 	if (ka->sa.sa_flags & SA_ONSTACK) {
-		if (sas_ss_flags(rsp) == 0)
+		if (sas_ss_flags(sp) == 0)
-			rsp = current->sas_ss_sp + current->sas_ss_size;
+			sp = current->sas_ss_sp + current->sas_ss_size;
 	}
 
 	/* This is the legacy signal stack switching. */
 	else if ((regs->ss & 0xffff) != __USER_DS &&
 		!(ka->sa.sa_flags & SA_RESTORER) &&
 		 ka->sa.sa_restorer)
-		rsp = (unsigned long) ka->sa.sa_restorer;
+		sp = (unsigned long) ka->sa.sa_restorer;
 
-	rsp -= frame_size;
+	sp -= frame_size;
 	/* Align the stack pointer according to the i386 ABI,
 	 * i.e. so that on function entry ((sp + 4) & 15) == 0. */
-	rsp = ((rsp + 4) & -16ul) - 4;
+	sp = ((sp + 4) & -16ul) - 4;
-	return (void __user *) rsp;
+	return (void __user *) sp;
 }
 
 int ia32_setup_frame(int sig, struct k_sigaction *ka,
@@ -486,13 +486,13 @@ int ia32_setup_frame(int sig, struct k_sigaction *ka,
 		goto give_sigsegv;
 
 	/* Set up registers for signal handler */
-	regs->rsp = (unsigned long) frame;
+	regs->sp = (unsigned long) frame;
-	regs->rip = (unsigned long) ka->sa.sa_handler;
+	regs->ip = (unsigned long) ka->sa.sa_handler;
 
 	/* Make -mregparm=3 work */
-	regs->rax = sig;
+	regs->ax = sig;
-	regs->rdx = 0;
+	regs->dx = 0;
-	regs->rcx = 0;
+	regs->cx = 0;
 
 	asm volatile("movl %0,%%ds" :: "r" (__USER32_DS));
 	asm volatile("movl %0,%%es" :: "r" (__USER32_DS));
@@ -501,13 +501,13 @@ int ia32_setup_frame(int sig, struct k_sigaction *ka,
 	regs->ss = __USER32_DS;
 
 	set_fs(USER_DS);
-	regs->eflags &= ~TF_MASK;
+	regs->flags &= ~TF_MASK;
 	if (test_thread_flag(TIF_SINGLESTEP))
 		ptrace_notify(SIGTRAP);
 
 #if DEBUG_SIG
 	printk(KERN_DEBUG "SIG deliver (%s:%d): sp=%p pc=%lx ra=%u\n",
-	       current->comm, current->pid, frame, regs->rip, frame->pretcode);
+	       current->comm, current->pid, frame, regs->ip, frame->pretcode);
 #endif
 
 	return 0;
@@ -556,7 +556,7 @@ int ia32_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 	err |= __put_user(0, &frame->uc.uc_flags);
 	err |= __put_user(0, &frame->uc.uc_link);
 	err |= __put_user(current->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
-	err |= __put_user(sas_ss_flags(regs->rsp),
+	err |= __put_user(sas_ss_flags(regs->sp),
 			  &frame->uc.uc_stack.ss_flags);
 	err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
 	err |= ia32_setup_sigcontext(&frame->uc.uc_mcontext, &frame->fpstate,
@@ -581,18 +581,18 @@ int ia32_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 		goto give_sigsegv;
 
 	/* Set up registers for signal handler */
-	regs->rsp = (unsigned long) frame;
+	regs->sp = (unsigned long) frame;
-	regs->rip = (unsigned long) ka->sa.sa_handler;
+	regs->ip = (unsigned long) ka->sa.sa_handler;
 
 	/* Make -mregparm=3 work */
-	regs->rax = sig;
+	regs->ax = sig;
-	regs->rdx = (unsigned long) &frame->info;
+	regs->dx = (unsigned long) &frame->info;
-	regs->rcx = (unsigned long) &frame->uc;
+	regs->cx = (unsigned long) &frame->uc;
 
 	/* Make -mregparm=3 work */
-	regs->rax = sig;
+	regs->ax = sig;
-	regs->rdx = (unsigned long) &frame->info;
+	regs->dx = (unsigned long) &frame->info;
-	regs->rcx = (unsigned long) &frame->uc;
+	regs->cx = (unsigned long) &frame->uc;
 
 	asm volatile("movl %0,%%ds" :: "r" (__USER32_DS));
 	asm volatile("movl %0,%%es" :: "r" (__USER32_DS));
@@ -601,13 +601,13 @@ int ia32_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 	regs->ss = __USER32_DS;
 
 	set_fs(USER_DS);
-	regs->eflags &= ~TF_MASK;
+	regs->flags &= ~TF_MASK;
 	if (test_thread_flag(TIF_SINGLESTEP))
 		ptrace_notify(SIGTRAP);
 
 #if DEBUG_SIG
 	printk(KERN_DEBUG "SIG deliver (%s:%d): sp=%p pc=%lx ra=%u\n",
-	       current->comm, current->pid, frame, regs->rip, frame->pretcode);
+	       current->comm, current->pid, frame, regs->ip, frame->pretcode);
 #endif
 
 	return 0;

arch/x86/ia32/ptrace32.c

@@ -73,19 +73,19 @@ static int putreg32(struct task_struct *child, unsigned regno, u32 val)
 		stack[offsetof(struct pt_regs, cs)/8] = val & 0xffff;
 		break;
 
-	R32(ebx, rbx);
+	R32(ebx, bx);
-	R32(ecx, rcx);
+	R32(ecx, cx);
-	R32(edx, rdx);
+	R32(edx, dx);
-	R32(edi, rdi);
+	R32(edi, di);
-	R32(esi, rsi);
+	R32(esi, si);
-	R32(ebp, rbp);
+	R32(ebp, bp);
-	R32(eax, rax);
+	R32(eax, ax);
-	R32(orig_eax, orig_rax);
+	R32(orig_eax, orig_ax);
-	R32(eip, rip);
+	R32(eip, ip);
-	R32(esp, rsp);
+	R32(esp, sp);
 
 	case offsetof(struct user32, regs.eflags): {
-		__u64 *flags = &stack[offsetof(struct pt_regs, eflags)/8];
+		__u64 *flags = &stack[offsetof(struct pt_regs, flags)/8];
 
 		val &= FLAG_MASK;
 		/*
@@ -145,22 +145,22 @@ static int getreg32(struct task_struct *child, unsigned regno, u32 *val)
 
 	R32(cs, cs);
 	R32(ss, ss);
-	R32(ebx, rbx);
+	R32(ebx, bx);
-	R32(ecx, rcx);
+	R32(ecx, cx);
-	R32(edx, rdx);
+	R32(edx, dx);
-	R32(edi, rdi);
+	R32(edi, di);
-	R32(esi, rsi);
+	R32(esi, si);
-	R32(ebp, rbp);
+	R32(ebp, bp);
-	R32(eax, rax);
+	R32(eax, ax);
-	R32(orig_eax, orig_rax);
+	R32(orig_eax, orig_ax);
-	R32(eip, rip);
+	R32(eip, ip);
-	R32(esp, rsp);
+	R32(esp, sp);
 
 	case offsetof(struct user32, regs.eflags):
 		/*
 		 * If the debugger set TF, hide it from the readout.
 		 */
-		*val = stack[offsetof(struct pt_regs, eflags)/8];
+		*val = stack[offsetof(struct pt_regs, flags)/8];
 		if (test_tsk_thread_flag(child, TIF_FORCED_TF))
 			*val &= ~X86_EFLAGS_TF;
 		break;

arch/x86/ia32/sys_ia32.c

@@ -816,11 +816,11 @@ asmlinkage long sys32_execve(char __user *name, compat_uptr_t __user *argv,
 asmlinkage long sys32_clone(unsigned int clone_flags, unsigned int newsp,
 			    struct pt_regs *regs)
 {
-	void __user *parent_tid = (void __user *)regs->rdx;
+	void __user *parent_tid = (void __user *)regs->dx;
-	void __user *child_tid = (void __user *)regs->rdi;
+	void __user *child_tid = (void __user *)regs->di;
 
 	if (!newsp)
-		newsp = regs->rsp;
+		newsp = regs->sp;
 	return do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid);
 }
 

arch/x86/kernel/acpi/wakeup_64.S

@@ -344,13 +344,13 @@ do_suspend_lowlevel:
 	call	save_processor_state
 
 	movq	$saved_context, %rax
-	movq	%rsp, pt_regs_rsp(%rax)
+	movq	%rsp, pt_regs_sp(%rax)
-	movq	%rbp, pt_regs_rbp(%rax)
+	movq	%rbp, pt_regs_bp(%rax)
-	movq	%rsi, pt_regs_rsi(%rax)
+	movq	%rsi, pt_regs_si(%rax)
-	movq	%rdi, pt_regs_rdi(%rax)
+	movq	%rdi, pt_regs_di(%rax)
-	movq	%rbx, pt_regs_rbx(%rax)
+	movq	%rbx, pt_regs_bx(%rax)
-	movq	%rcx, pt_regs_rcx(%rax)
+	movq	%rcx, pt_regs_cx(%rax)
-	movq	%rdx, pt_regs_rdx(%rax)
+	movq	%rdx, pt_regs_dx(%rax)
 	movq	%r8, pt_regs_r8(%rax)
 	movq	%r9, pt_regs_r9(%rax)
 	movq	%r10, pt_regs_r10(%rax)
@@ -360,7 +360,7 @@ do_suspend_lowlevel:
 	movq	%r14, pt_regs_r14(%rax)
 	movq	%r15, pt_regs_r15(%rax)
 	pushfq
-	popq	pt_regs_eflags(%rax)
+	popq	pt_regs_flags(%rax)
 
 	movq	$.L97, saved_rip(%rip)
 
@@ -391,15 +391,15 @@ do_suspend_lowlevel:
 	movq	%rbx, %cr2
 	movq	saved_context_cr0(%rax), %rbx
 	movq	%rbx, %cr0
-	pushq	pt_regs_eflags(%rax)
+	pushq	pt_regs_flags(%rax)
 	popfq
-	movq	pt_regs_rsp(%rax), %rsp
+	movq	pt_regs_sp(%rax), %rsp
-	movq	pt_regs_rbp(%rax), %rbp
+	movq	pt_regs_bp(%rax), %rbp
-	movq	pt_regs_rsi(%rax), %rsi
+	movq	pt_regs_si(%rax), %rsi
-	movq	pt_regs_rdi(%rax), %rdi
+	movq	pt_regs_di(%rax), %rdi
-	movq	pt_regs_rbx(%rax), %rbx
+	movq	pt_regs_bx(%rax), %rbx
-	movq	pt_regs_rcx(%rax), %rcx
+	movq	pt_regs_cx(%rax), %rcx
-	movq	pt_regs_rdx(%rax), %rdx
+	movq	pt_regs_dx(%rax), %rdx
 	movq	pt_regs_r8(%rax), %r8
 	movq	pt_regs_r9(%rax), %r9
 	movq	pt_regs_r10(%rax), %r10

arch/x86/kernel/asm-offsets_32.c

@@ -75,22 +75,22 @@ void foo(void)
 	OFFSET(GDS_pad, Xgt_desc_struct, pad);
 	BLANK();
 
-	OFFSET(PT_EBX, pt_regs, ebx);
+	OFFSET(PT_EBX, pt_regs, bx);
-	OFFSET(PT_ECX, pt_regs, ecx);
+	OFFSET(PT_ECX, pt_regs, cx);
-	OFFSET(PT_EDX, pt_regs, edx);
+	OFFSET(PT_EDX, pt_regs, dx);
-	OFFSET(PT_ESI, pt_regs, esi);
+	OFFSET(PT_ESI, pt_regs, si);
-	OFFSET(PT_EDI, pt_regs, edi);
+	OFFSET(PT_EDI, pt_regs, di);
-	OFFSET(PT_EBP, pt_regs, ebp);
+	OFFSET(PT_EBP, pt_regs, bp);
-	OFFSET(PT_EAX, pt_regs, eax);
+	OFFSET(PT_EAX, pt_regs, ax);
-	OFFSET(PT_DS,  pt_regs, xds);
+	OFFSET(PT_DS,  pt_regs, ds);
-	OFFSET(PT_ES,  pt_regs, xes);
+	OFFSET(PT_ES,  pt_regs, es);
-	OFFSET(PT_FS,  pt_regs, xfs);
+	OFFSET(PT_FS,  pt_regs, fs);
-	OFFSET(PT_ORIG_EAX, pt_regs, orig_eax);
+	OFFSET(PT_ORIG_EAX, pt_regs, orig_ax);
-	OFFSET(PT_EIP, pt_regs, eip);
+	OFFSET(PT_EIP, pt_regs, ip);
-	OFFSET(PT_CS,  pt_regs, xcs);
+	OFFSET(PT_CS,  pt_regs, cs);
-	OFFSET(PT_EFLAGS, pt_regs, eflags);
+	OFFSET(PT_EFLAGS, pt_regs, flags);
-	OFFSET(PT_OLDESP, pt_regs, esp);
+	OFFSET(PT_OLDESP, pt_regs, sp);
-	OFFSET(PT_OLDSS,  pt_regs, xss);
+	OFFSET(PT_OLDSS,  pt_regs, ss);
 	BLANK();
 
 	OFFSET(EXEC_DOMAIN_handler, exec_domain, handler);

arch/x86/kernel/asm-offsets_64.c

@@ -83,14 +83,14 @@ int main(void)
 	DEFINE(pbe_next, offsetof(struct pbe, next));
 	BLANK();
 #define ENTRY(entry) DEFINE(pt_regs_ ## entry, offsetof(struct pt_regs, entry))
-	ENTRY(rbx);
+	ENTRY(bx);
-	ENTRY(rbx);
+	ENTRY(bx);
-	ENTRY(rcx);
+	ENTRY(cx);
-	ENTRY(rdx);
+	ENTRY(dx);
-	ENTRY(rsp);
+	ENTRY(sp);
-	ENTRY(rbp);
+	ENTRY(bp);
-	ENTRY(rsi);
+	ENTRY(si);
-	ENTRY(rdi);
+	ENTRY(di);
 	ENTRY(r8);
 	ENTRY(r9);
 	ENTRY(r10);
@@ -99,7 +99,7 @@ int main(void)
 	ENTRY(r13);
 	ENTRY(r14);
 	ENTRY(r15);
-	ENTRY(eflags);
+	ENTRY(flags);
 	BLANK();
 #undef ENTRY
 #define ENTRY(entry) DEFINE(saved_context_ ## entry, offsetof(struct saved_context, entry))

arch/x86/kernel/cpu/common.c

@@ -634,7 +634,7 @@ void __init early_cpu_init(void)
 struct pt_regs * __devinit idle_regs(struct pt_regs *regs)
 {
 	memset(regs, 0, sizeof(struct pt_regs));
-	regs->xfs = __KERNEL_PERCPU;
+	regs->fs = __KERNEL_PERCPU;
 	return regs;
 }
 

arch/x86/kernel/cpu/mcheck/mce_64.c

@@ -110,12 +110,12 @@ static void print_mce(struct mce *m)
 	       KERN_EMERG
 	       "CPU %d: Machine Check Exception: %16Lx Bank %d: %016Lx\n",
 	       m->cpu, m->mcgstatus, m->bank, m->status);
-	if (m->rip) {
+	if (m->ip) {
 		printk(KERN_EMERG "RIP%s %02x:<%016Lx> ",
 		       !(m->mcgstatus & MCG_STATUS_EIPV) ? " !INEXACT!" : "",
-		       m->cs, m->rip);
+		       m->cs, m->ip);
 		if (m->cs == __KERNEL_CS)
-			print_symbol("{%s}", m->rip);
+			print_symbol("{%s}", m->ip);
 		printk("\n");
 	}
 	printk(KERN_EMERG "TSC %Lx ", m->tsc);
@@ -156,16 +156,16 @@ static int mce_available(struct cpuinfo_x86 *c)
 static inline void mce_get_rip(struct mce *m, struct pt_regs *regs)
 {
 	if (regs && (m->mcgstatus & MCG_STATUS_RIPV)) {
-		m->rip = regs->rip;
+		m->ip = regs->ip;
 		m->cs = regs->cs;
 	} else {
-		m->rip = 0;
+		m->ip = 0;
 		m->cs = 0;
 	}
 	if (rip_msr) {
 		/* Assume the RIP in the MSR is exact. Is this true? */
 		m->mcgstatus |= MCG_STATUS_EIPV;
-		rdmsrl(rip_msr, m->rip);
+		rdmsrl(rip_msr, m->ip);
 		m->cs = 0;
 	}
 }
@@ -288,7 +288,7 @@ void do_machine_check(struct pt_regs * regs, long error_code)
 		 * instruction which caused the MCE.
 		 */
 		if (m.mcgstatus & MCG_STATUS_EIPV)
-			user_space = panicm.rip && (panicm.cs & 3);
+			user_space = panicm.ip && (panicm.cs & 3);
 
 		/*
 		 * If we know that the error was in user space, send a

arch/x86/kernel/i8259_32.c

@@ -339,7 +339,7 @@ static irqreturn_t math_error_irq(int cpl, void *dev_id)
 	outb(0,0xF0);
 	if (ignore_fpu_irq || !boot_cpu_data.hard_math)
 		return IRQ_NONE;
-	math_error((void __user *)get_irq_regs()->eip);
+	math_error((void __user *)get_irq_regs()->ip);
 	return IRQ_HANDLED;
 }
 

arch/x86/kernel/io_apic_64.c

@@ -1412,7 +1412,7 @@ static void irq_complete_move(unsigned int irq)
 	if (likely(!cfg->move_in_progress))
 		return;
 
-	vector = ~get_irq_regs()->orig_rax;
+	vector = ~get_irq_regs()->orig_ax;
 	me = smp_processor_id();
 	if ((vector == cfg->vector) && cpu_isset(me, cfg->domain)) {
 		cpumask_t cleanup_mask;

arch/x86/kernel/ioport_32.c

@@ -100,7 +100,7 @@ asmlinkage long sys_ioperm(unsigned long from, unsigned long num, int turn_on)
  * beyond the 0x3ff range: to get the full 65536 ports bitmapped
  * you'd need 8kB of bitmaps/process, which is a bit excessive.
  *
- * Here we just change the eflags value on the stack: we allow
+ * Here we just change the flags value on the stack: we allow
  * only the super-user to do it. This depends on the stack-layout
  * on system-call entry - see also fork() and the signal handling
  * code.
@@ -109,8 +109,8 @@ asmlinkage long sys_ioperm(unsigned long from, unsigned long num, int turn_on)
 asmlinkage long sys_iopl(unsigned long regsp)
 {
 	volatile struct pt_regs *regs = (struct pt_regs *)&regsp;
-	unsigned int level = regs->ebx;
+	unsigned int level = regs->bx;
-	unsigned int old = (regs->eflags >> 12) & 3;
+	unsigned int old = (regs->flags >> 12) & 3;
 	struct thread_struct *t = &current->thread;
 
 	if (level > 3)
@@ -122,7 +122,7 @@ asmlinkage long sys_iopl(unsigned long regsp)
 	}
 
 	t->iopl = level << 12;
-	regs->eflags = (regs->eflags & ~X86_EFLAGS_IOPL) | t->iopl;
+	regs->flags = (regs->flags & ~X86_EFLAGS_IOPL) | t->iopl;
 	set_iopl_mask(t->iopl);
 
 	return 0;

arch/x86/kernel/ioport_64.c

@@ -95,7 +95,7 @@ asmlinkage long sys_ioperm(unsigned long from, unsigned long num, int turn_on)
  * beyond the 0x3ff range: to get the full 65536 ports bitmapped
  * you'd need 8kB of bitmaps/process, which is a bit excessive.
  *
- * Here we just change the eflags value on the stack: we allow
+ * Here we just change the flags value on the stack: we allow
  * only the super-user to do it. This depends on the stack-layout
  * on system-call entry - see also fork() and the signal handling
  * code.
@@ -103,7 +103,7 @@ asmlinkage long sys_ioperm(unsigned long from, unsigned long num, int turn_on)
 
 asmlinkage long sys_iopl(unsigned int level, struct pt_regs *regs)
 {
-	unsigned int old = (regs->eflags >> 12) & 3;
+	unsigned int old = (regs->flags >> 12) & 3;
 
 	if (level > 3)
 		return -EINVAL;
@@ -112,6 +112,6 @@ asmlinkage long sys_iopl(unsigned int level, struct pt_regs *regs)
 		if (!capable(CAP_SYS_RAWIO))
 			return -EPERM;
 	}
-	regs->eflags = (regs->eflags &~ X86_EFLAGS_IOPL) | (level << 12);
+	regs->flags = (regs->flags &~ X86_EFLAGS_IOPL) | (level << 12);
 	return 0;
 }

arch/x86/kernel/irq_32.c

@@ -70,7 +70,7 @@ fastcall unsigned int do_IRQ(struct pt_regs *regs)
 {	
 	struct pt_regs *old_regs;
 	/* high bit used in ret_from_ code */
-	int irq = ~regs->orig_eax;
+	int irq = ~regs->orig_ax;
 	struct irq_desc *desc = irq_desc + irq;
 #ifdef CONFIG_4KSTACKS
 	union irq_ctx *curctx, *irqctx;
@@ -88,13 +88,13 @@ fastcall unsigned int do_IRQ(struct pt_regs *regs)
 #ifdef CONFIG_DEBUG_STACKOVERFLOW
 	/* Debugging check for stack overflow: is there less than 1KB free? */
 	{
-		long esp;
+		long sp;
 
 		__asm__ __volatile__("andl %%esp,%0" :
-					"=r" (esp) : "0" (THREAD_SIZE - 1));
+					"=r" (sp) : "0" (THREAD_SIZE - 1));
-		if (unlikely(esp < (sizeof(struct thread_info) + STACK_WARN))) {
+		if (unlikely(sp < (sizeof(struct thread_info) + STACK_WARN))) {
 			printk("do_IRQ: stack overflow: %ld\n",
-				esp - sizeof(struct thread_info));
+				sp - sizeof(struct thread_info));
 			dump_stack();
 		}
 	}
@@ -112,7 +112,7 @@ fastcall unsigned int do_IRQ(struct pt_regs *regs)
 	 * current stack (which is the irq stack already after all)
 	 */
 	if (curctx != irqctx) {
-		int arg1, arg2, ebx;
+		int arg1, arg2, bx;
 
 		/* build the stack frame on the IRQ stack */
 		isp = (u32*) ((char*)irqctx + sizeof(*irqctx));
@@ -128,10 +128,10 @@ fastcall unsigned int do_IRQ(struct pt_regs *regs)
 			(curctx->tinfo.preempt_count & SOFTIRQ_MASK);
 
 		asm volatile(
-			"       xchgl  %%ebx,%%esp      \n"
+			"       xchgl  %%ebx,%%esp    \n"
-			"       call   *%%edi           \n"
+			"       call   *%%edi         \n"
-			"       movl   %%ebx,%%esp      \n"
+			"       movl   %%ebx,%%esp    \n"
-			: "=a" (arg1), "=d" (arg2), "=b" (ebx)
+			: "=a" (arg1), "=d" (arg2), "=b" (bx)
 			:  "0" (irq),   "1" (desc),  "2" (isp),
 			   "D" (desc->handle_irq)
 			: "memory", "cc"

arch/x86/kernel/irq_64.c

@@ -53,11 +53,11 @@ static inline void stack_overflow_check(struct pt_regs *regs)
 	u64 curbase = (u64)task_stack_page(current);
 	static unsigned long warned = -60*HZ;
 
-	if (regs->rsp >= curbase && regs->rsp <= curbase + THREAD_SIZE &&
+	if (regs->sp >= curbase && regs->sp <= curbase + THREAD_SIZE &&
-	    regs->rsp <  curbase + sizeof(struct thread_info) + 128 &&
+	    regs->sp <  curbase + sizeof(struct thread_info) + 128 &&
 	    time_after(jiffies, warned + 60*HZ)) {
-		printk("do_IRQ: %s near stack overflow (cur:%Lx,rsp:%lx)\n",
+		printk("do_IRQ: %s near stack overflow (cur:%Lx,sp:%lx)\n",
-		       current->comm, curbase, regs->rsp);
+		       current->comm, curbase, regs->sp);
 		show_stack(NULL,NULL);
 		warned = jiffies;
 	}
@@ -162,7 +162,7 @@ asmlinkage unsigned int do_IRQ(struct pt_regs *regs)
 	struct pt_regs *old_regs = set_irq_regs(regs);
 
 	/* high bit used in ret_from_ code  */
-	unsigned vector = ~regs->orig_rax;
+	unsigned vector = ~regs->orig_ax;
 	unsigned irq;
 
 	exit_idle();

arch/x86/kernel/kprobes_32.c

@@ -212,7 +212,7 @@ static void __kprobes set_current_kprobe(struct kprobe *p, struct pt_regs *regs,
 {
 	__get_cpu_var(current_kprobe) = p;
 	kcb->kprobe_saved_eflags = kcb->kprobe_old_eflags
-		= (regs->eflags & (TF_MASK | IF_MASK));
+		= (regs->flags & (TF_MASK | IF_MASK));
 	if (is_IF_modifier(p->opcode))
 		kcb->kprobe_saved_eflags &= ~IF_MASK;
 }
@@ -232,20 +232,20 @@ static __always_inline void restore_btf(void)
 static void __kprobes prepare_singlestep(struct kprobe *p, struct pt_regs *regs)
 {
 	clear_btf();
-	regs->eflags |= TF_MASK;
+	regs->flags |= TF_MASK;
-	regs->eflags &= ~IF_MASK;
+	regs->flags &= ~IF_MASK;
 	/*single step inline if the instruction is an int3*/
 	if (p->opcode == BREAKPOINT_INSTRUCTION)
-		regs->eip = (unsigned long)p->addr;
+		regs->ip = (unsigned long)p->addr;
 	else
-		regs->eip = (unsigned long)p->ainsn.insn;
+		regs->ip = (unsigned long)p->ainsn.insn;
 }
 
 /* Called with kretprobe_lock held */
 void __kprobes arch_prepare_kretprobe(struct kretprobe_instance *ri,
 				      struct pt_regs *regs)
 {
-	unsigned long *sara = (unsigned long *)&regs->esp;
+	unsigned long *sara = (unsigned long *)&regs->sp;
 
 	ri->ret_addr = (kprobe_opcode_t *) *sara;
 
@@ -264,7 +264,7 @@ static int __kprobes kprobe_handler(struct pt_regs *regs)
 	kprobe_opcode_t *addr;
 	struct kprobe_ctlblk *kcb;
 
-	addr = (kprobe_opcode_t *)(regs->eip - sizeof(kprobe_opcode_t));
+	addr = (kprobe_opcode_t *)(regs->ip - sizeof(kprobe_opcode_t));
 
 	/*
 	 * We don't want to be preempted for the entire
@@ -279,8 +279,8 @@ static int __kprobes kprobe_handler(struct pt_regs *regs)
 		if (p) {
 			if (kcb->kprobe_status == KPROBE_HIT_SS &&
 				*p->ainsn.insn == BREAKPOINT_INSTRUCTION) {
-				regs->eflags &= ~TF_MASK;
+				regs->flags &= ~TF_MASK;
-				regs->eflags |= kcb->kprobe_saved_eflags;
+				regs->flags |= kcb->kprobe_saved_eflags;
 				goto no_kprobe;
 			}
 			/* We have reentered the kprobe_handler(), since
@@ -301,7 +301,7 @@ static int __kprobes kprobe_handler(struct pt_regs *regs)
 			 * another cpu right after we hit, no further
 			 * handling of this interrupt is appropriate
 			 */
-				regs->eip -= sizeof(kprobe_opcode_t);
+				regs->ip -= sizeof(kprobe_opcode_t);
 				ret = 1;
 				goto no_kprobe;
 			}
@@ -325,7 +325,7 @@ static int __kprobes kprobe_handler(struct pt_regs *regs)
 			 * Back up over the (now missing) int3 and run
 			 * the original instruction.
 			 */
-			regs->eip -= sizeof(kprobe_opcode_t);
+			regs->ip -= sizeof(kprobe_opcode_t);
 			ret = 1;
 		}
 		/* Not one of ours: let kernel handle it */
@@ -344,7 +344,7 @@ ss_probe:
 	if (p->ainsn.boostable == 1 && !p->post_handler){
 		/* Boost up -- we can execute copied instructions directly */
 		reset_current_kprobe();
-		regs->eip = (unsigned long)p->ainsn.insn;
+		regs->ip = (unsigned long)p->ainsn.insn;
 		preempt_enable_no_resched();
 		return 1;
 	}
@@ -368,7 +368,7 @@ no_kprobe:
 	asm volatile ( ".global kretprobe_trampoline\n"
 			"kretprobe_trampoline: \n"
 			"	pushf\n"
-			/* skip cs, eip, orig_eax */
+			/* skip cs, ip, orig_ax */
 			"	subl $12, %esp\n"
 			"	pushl %fs\n"
 			"	pushl %ds\n"
@@ -382,10 +382,10 @@ no_kprobe:
 			"	pushl %ebx\n"
 			"	movl %esp, %eax\n"
 			"	call trampoline_handler\n"
-			/* move eflags to cs */
+			/* move flags to cs */
 			"	movl 52(%esp), %edx\n"
 			"	movl %edx, 48(%esp)\n"
-			/* save true return address on eflags */
+			/* save true return address on flags */
 			"	movl %eax, 52(%esp)\n"
 			"	popl %ebx\n"
 			"	popl %ecx\n"
@@ -394,7 +394,7 @@ no_kprobe:
 			"	popl %edi\n"
 			"	popl %ebp\n"
 			"	popl %eax\n"
-			/* skip eip, orig_eax, es, ds, fs */
+			/* skip ip, orig_ax, es, ds, fs */
 			"	addl $20, %esp\n"
 			"	popf\n"
 			"	ret\n");
@@ -415,9 +415,9 @@ fastcall void *__kprobes trampoline_handler(struct pt_regs *regs)
 	spin_lock_irqsave(&kretprobe_lock, flags);
 	head = kretprobe_inst_table_head(current);
 	/* fixup registers */
-	regs->xcs = __KERNEL_CS | get_kernel_rpl();
+	regs->cs = __KERNEL_CS | get_kernel_rpl();
-	regs->eip = trampoline_address;
+	regs->ip = trampoline_address;
-	regs->orig_eax = 0xffffffff;
+	regs->orig_ax = 0xffffffff;
 
 	/*
 	 * It is possible to have multiple instances associated with a given
@@ -478,11 +478,11 @@ fastcall void *__kprobes trampoline_handler(struct pt_regs *regs)
  * interrupt.  We have to fix up the stack as follows:
  *
  * 0) Except in the case of absolute or indirect jump or call instructions,
- * the new eip is relative to the copied instruction.  We need to make
+ * the new ip is relative to the copied instruction.  We need to make
  * it relative to the original instruction.
  *
  * 1) If the single-stepped instruction was pushfl, then the TF and IF
- * flags are set in the just-pushed eflags, and may need to be cleared.
+ * flags are set in the just-pushed flags, and may need to be cleared.
  *
  * 2) If the single-stepped instruction was a call, the return address
  * that is atop the stack is the address following the copied instruction.
@@ -493,11 +493,11 @@ fastcall void *__kprobes trampoline_handler(struct pt_regs *regs)
 static void __kprobes resume_execution(struct kprobe *p,
 		struct pt_regs *regs, struct kprobe_ctlblk *kcb)
 {
-	unsigned long *tos = (unsigned long *)&regs->esp;
+	unsigned long *tos = (unsigned long *)&regs->sp;
 	unsigned long copy_eip = (unsigned long)p->ainsn.insn;
 	unsigned long orig_eip = (unsigned long)p->addr;
 
-	regs->eflags &= ~TF_MASK;
+	regs->flags &= ~TF_MASK;
 	switch (p->ainsn.insn[0]) {
 	case 0x9c:		/* pushfl */
 		*tos &= ~(TF_MASK | IF_MASK);
@@ -508,8 +508,8 @@ static void __kprobes resume_execution(struct kprobe *p,
 	case 0xca:
 	case 0xcb:
 	case 0xcf:
-	case 0xea:		/* jmp absolute -- eip is correct */
+	case 0xea:		/* jmp absolute -- ip is correct */
-		/* eip is already adjusted, no more changes required */
+		/* ip is already adjusted, no more changes required */
 		p->ainsn.boostable = 1;
 		goto no_change;
 	case 0xe8:		/* call relative - Fix return addr */
@@ -522,14 +522,14 @@ static void __kprobes resume_execution(struct kprobe *p,
 		if ((p->ainsn.insn[1] & 0x30) == 0x10) {
 			/*
 			 * call absolute, indirect
-			 * Fix return addr; eip is correct.
+			 * Fix return addr; ip is correct.
 			 * But this is not boostable
 			 */
 			*tos = orig_eip + (*tos - copy_eip);
 			goto no_change;
 		} else if (((p->ainsn.insn[1] & 0x31) == 0x20) ||	/* jmp near, absolute indirect */
 			   ((p->ainsn.insn[1] & 0x31) == 0x21)) {	/* jmp far, absolute indirect */
-			/* eip is correct. And this is boostable */
+			/* ip is correct. And this is boostable */
 			p->ainsn.boostable = 1;
 			goto no_change;
 		}
@@ -538,21 +538,21 @@ static void __kprobes resume_execution(struct kprobe *p,
 	}
 
 	if (p->ainsn.boostable == 0) {
-		if ((regs->eip > copy_eip) &&
+		if ((regs->ip > copy_eip) &&
-		    (regs->eip - copy_eip) + 5 < MAX_INSN_SIZE) {
+		    (regs->ip - copy_eip) + 5 < MAX_INSN_SIZE) {
 			/*
 			 * These instructions can be executed directly if it
 			 * jumps back to correct address.
 			 */
-			set_jmp_op((void *)regs->eip,
+			set_jmp_op((void *)regs->ip,
-				   (void *)orig_eip + (regs->eip - copy_eip));
+				   (void *)orig_eip + (regs->ip - copy_eip));
 			p->ainsn.boostable = 1;
 		} else {
 			p->ainsn.boostable = -1;
 		}
 	}
 
-	regs->eip = orig_eip + (regs->eip - copy_eip);
+	regs->ip = orig_eip + (regs->ip - copy_eip);
 
 no_change:
 	restore_btf();
@@ -578,8 +578,8 @@ static int __kprobes post_kprobe_handler(struct pt_regs *regs)
 	}
 
 	resume_execution(cur, regs, kcb);
-	regs->eflags |= kcb->kprobe_saved_eflags;
+	regs->flags |= kcb->kprobe_saved_eflags;
-	trace_hardirqs_fixup_flags(regs->eflags);
+	trace_hardirqs_fixup_flags(regs->flags);
 
 	/*Restore back the original saved kprobes variables and continue. */
 	if (kcb->kprobe_status == KPROBE_REENTER) {
@@ -591,11 +591,11 @@ out:
 	preempt_enable_no_resched();
 
 	/*
-	 * if somebody else is singlestepping across a probe point, eflags
+	 * if somebody else is singlestepping across a probe point, flags
 	 * will have TF set, in which case, continue the remaining processing
 	 * of do_debug, as if this is not a probe hit.
 	 */
-	if (regs->eflags & TF_MASK)
+	if (regs->flags & TF_MASK)
 		return 0;
 
 	return 1;
@@ -612,12 +612,12 @@ int __kprobes kprobe_fault_handler(struct pt_regs *regs, int trapnr)
 		/*
 		 * We are here because the instruction being single
 		 * stepped caused a page fault. We reset the current
-		 * kprobe and the eip points back to the probe address
+		 * kprobe and the ip points back to the probe address
 		 * and allow the page fault handler to continue as a
 		 * normal page fault.
 		 */
-		regs->eip = (unsigned long)cur->addr;
+		regs->ip = (unsigned long)cur->addr;
-		regs->eflags |= kcb->kprobe_old_eflags;
+		regs->flags |= kcb->kprobe_old_eflags;
 		if (kcb->kprobe_status == KPROBE_REENTER)
 			restore_previous_kprobe(kcb);
 		else
@@ -703,7 +703,7 @@ int __kprobes setjmp_pre_handler(struct kprobe *p, struct pt_regs *regs)
 	struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
 
 	kcb->jprobe_saved_regs = *regs;
-	kcb->jprobe_saved_esp = &regs->esp;
+	kcb->jprobe_saved_esp = &regs->sp;
 	addr = (unsigned long)(kcb->jprobe_saved_esp);
 
 	/*
@@ -715,9 +715,9 @@ int __kprobes setjmp_pre_handler(struct kprobe *p, struct pt_regs *regs)
 	 */
 	memcpy(kcb->jprobes_stack, (kprobe_opcode_t *)addr,
 			MIN_STACK_SIZE(addr));
-	regs->eflags &= ~IF_MASK;
+	regs->flags &= ~IF_MASK;
 	trace_hardirqs_off();
-	regs->eip = (unsigned long)(jp->entry);
+	regs->ip = (unsigned long)(jp->entry);
 	return 1;
 }
 
@@ -736,15 +736,15 @@ void __kprobes jprobe_return(void)
 int __kprobes longjmp_break_handler(struct kprobe *p, struct pt_regs *regs)
 {
 	struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
-	u8 *addr = (u8 *) (regs->eip - 1);
+	u8 *addr = (u8 *) (regs->ip - 1);
 	unsigned long stack_addr = (unsigned long)(kcb->jprobe_saved_esp);
 	struct jprobe *jp = container_of(p, struct jprobe, kp);
 
 	if ((addr > (u8 *) jprobe_return) && (addr < (u8 *) jprobe_return_end)) {
-		if (&regs->esp != kcb->jprobe_saved_esp) {
+		if (&regs->sp != kcb->jprobe_saved_esp) {
 			struct pt_regs *saved_regs = &kcb->jprobe_saved_regs;
-			printk("current esp %p does not match saved esp %p\n",
+			printk("current sp %p does not match saved sp %p\n",
-			       &regs->esp, kcb->jprobe_saved_esp);
+			       &regs->sp, kcb->jprobe_saved_esp);
 			printk("Saved registers for jprobe %p\n", jp);
 			show_registers(saved_regs);
 			printk("Current registers\n");

arch/x86/kernel/kprobes_64.c

@@ -251,7 +251,7 @@ static void __kprobes set_current_kprobe(struct kprobe *p, struct pt_regs *regs,
 {
 	__get_cpu_var(current_kprobe) = p;
 	kcb->kprobe_saved_rflags = kcb->kprobe_old_rflags
-		= (regs->eflags & (TF_MASK | IF_MASK));
+		= (regs->flags & (TF_MASK | IF_MASK));
 	if (is_IF_modifier(p->ainsn.insn))
 		kcb->kprobe_saved_rflags &= ~IF_MASK;
 }
@@ -271,20 +271,20 @@ static __always_inline void restore_btf(void)
 static void __kprobes prepare_singlestep(struct kprobe *p, struct pt_regs *regs)
 {
 	clear_btf();
-	regs->eflags |= TF_MASK;
+	regs->flags |= TF_MASK;
-	regs->eflags &= ~IF_MASK;
+	regs->flags &= ~IF_MASK;
 	/*single step inline if the instruction is an int3*/
 	if (p->opcode == BREAKPOINT_INSTRUCTION)
-		regs->rip = (unsigned long)p->addr;
+		regs->ip = (unsigned long)p->addr;
 	else
-		regs->rip = (unsigned long)p->ainsn.insn;
+		regs->ip = (unsigned long)p->ainsn.insn;
 }
 
 /* Called with kretprobe_lock held */
 void __kprobes arch_prepare_kretprobe(struct kretprobe_instance *ri,
 				      struct pt_regs *regs)
 {
-	unsigned long *sara = (unsigned long *)regs->rsp;
+	unsigned long *sara = (unsigned long *)regs->sp;
 
 	ri->ret_addr = (kprobe_opcode_t *) *sara;
 	/* Replace the return addr with trampoline addr */
@@ -295,7 +295,7 @@ int __kprobes kprobe_handler(struct pt_regs *regs)
 {
 	struct kprobe *p;
 	int ret = 0;
-	kprobe_opcode_t *addr = (kprobe_opcode_t *)(regs->rip - sizeof(kprobe_opcode_t));
+	kprobe_opcode_t *addr = (kprobe_opcode_t *)(regs->ip - sizeof(kprobe_opcode_t));
 	struct kprobe_ctlblk *kcb;
 
 	/*
@@ -311,8 +311,8 @@ int __kprobes kprobe_handler(struct pt_regs *regs)
 		if (p) {
 			if (kcb->kprobe_status == KPROBE_HIT_SS &&
 				*p->ainsn.insn == BREAKPOINT_INSTRUCTION) {
-				regs->eflags &= ~TF_MASK;
+				regs->flags &= ~TF_MASK;
-				regs->eflags |= kcb->kprobe_saved_rflags;
+				regs->flags |= kcb->kprobe_saved_rflags;
 				goto no_kprobe;
 			} else if (kcb->kprobe_status == KPROBE_HIT_SSDONE) {
 				/* TODO: Provide re-entrancy from
@@ -321,7 +321,7 @@ int __kprobes kprobe_handler(struct pt_regs *regs)
 				 * the instruction of the new probe.
 				 */
 				arch_disarm_kprobe(p);
-				regs->rip = (unsigned long)p->addr;
+				regs->ip = (unsigned long)p->addr;
 				reset_current_kprobe();
 				ret = 1;
 			} else {
@@ -345,7 +345,7 @@ int __kprobes kprobe_handler(struct pt_regs *regs)
 			 * another cpu right after we hit, no further
 			 * handling of this interrupt is appropriate
 			 */
-				regs->rip = (unsigned long)addr;
+				regs->ip = (unsigned long)addr;
 				ret = 1;
 				goto no_kprobe;
 			}
@@ -369,7 +369,7 @@ int __kprobes kprobe_handler(struct pt_regs *regs)
 			 * Back up over the (now missing) int3 and run
 			 * the original instruction.
 			 */
-			regs->rip = (unsigned long)addr;
+			regs->ip = (unsigned long)addr;
 			ret = 1;
 		}
 		/* Not one of ours: let kernel handle it */
@@ -454,7 +454,7 @@ int __kprobes trampoline_probe_handler(struct kprobe *p, struct pt_regs *regs)
 	}
 
 	kretprobe_assert(ri, orig_ret_address, trampoline_address);
-	regs->rip = orig_ret_address;
+	regs->ip = orig_ret_address;
 
 	reset_current_kprobe();
 	spin_unlock_irqrestore(&kretprobe_lock, flags);
@@ -484,11 +484,11 @@ int __kprobes trampoline_probe_handler(struct kprobe *p, struct pt_regs *regs)
  * interrupt.  We have to fix up the stack as follows:
  *
  * 0) Except in the case of absolute or indirect jump or call instructions,
- * the new rip is relative to the copied instruction.  We need to make
+ * the new ip is relative to the copied instruction.  We need to make
  * it relative to the original instruction.
  *
  * 1) If the single-stepped instruction was pushfl, then the TF and IF
- * flags are set in the just-pushed eflags, and may need to be cleared.
+ * flags are set in the just-pushed flags, and may need to be cleared.
  *
  * 2) If the single-stepped instruction was a call, the return address
  * that is atop the stack is the address following the copied instruction.
@@ -497,7 +497,7 @@ int __kprobes trampoline_probe_handler(struct kprobe *p, struct pt_regs *regs)
 static void __kprobes resume_execution(struct kprobe *p,
 		struct pt_regs *regs, struct kprobe_ctlblk *kcb)
 {
-	unsigned long *tos = (unsigned long *)regs->rsp;
+	unsigned long *tos = (unsigned long *)regs->sp;
 	unsigned long copy_rip = (unsigned long)p->ainsn.insn;
 	unsigned long orig_rip = (unsigned long)p->addr;
 	kprobe_opcode_t *insn = p->ainsn.insn;
@@ -506,7 +506,7 @@ static void __kprobes resume_execution(struct kprobe *p,
 	if (*insn >= 0x40 && *insn <= 0x4f)
 		insn++;
 
-	regs->eflags &= ~TF_MASK;
+	regs->flags &= ~TF_MASK;
 	switch (*insn) {
 	case 0x9c:	/* pushfl */
 		*tos &= ~(TF_MASK | IF_MASK);
@@ -538,7 +538,8 @@ static void __kprobes resume_execution(struct kprobe *p,
 		break;
 	}
 
-	regs->rip = orig_rip + (regs->rip - copy_rip);
+	regs->ip = orig_rip + (regs->ip - copy_rip);
+
 no_change:
 	restore_btf();
 
@@ -559,8 +560,8 @@ int __kprobes post_kprobe_handler(struct pt_regs *regs)
 	}
 
 	resume_execution(cur, regs, kcb);
-	regs->eflags |= kcb->kprobe_saved_rflags;
+	regs->flags |= kcb->kprobe_saved_rflags;
-	trace_hardirqs_fixup_flags(regs->eflags);
+	trace_hardirqs_fixup_flags(regs->flags);
 
 	/* Restore the original saved kprobes variables and continue. */
 	if (kcb->kprobe_status == KPROBE_REENTER) {
@@ -572,11 +573,11 @@ out:
 	preempt_enable_no_resched();
 
 	/*
-	 * if somebody else is singlestepping across a probe point, eflags
+	 * if somebody else is singlestepping across a probe point, flags
 	 * will have TF set, in which case, continue the remaining processing
 	 * of do_debug, as if this is not a probe hit.
 	 */
-	if (regs->eflags & TF_MASK)
+	if (regs->flags & TF_MASK)
 		return 0;
 
 	return 1;
@@ -594,12 +595,12 @@ int __kprobes kprobe_fault_handler(struct pt_regs *regs, int trapnr)
 		/*
 		 * We are here because the instruction being single
 		 * stepped caused a page fault. We reset the current
-		 * kprobe and the rip points back to the probe address
+		 * kprobe and the ip points back to the probe address
 		 * and allow the page fault handler to continue as a
 		 * normal page fault.
 		 */
-		regs->rip = (unsigned long)cur->addr;
+		regs->ip = (unsigned long)cur->addr;
-		regs->eflags |= kcb->kprobe_old_rflags;
+		regs->flags |= kcb->kprobe_old_rflags;
 		if (kcb->kprobe_status == KPROBE_REENTER)
 			restore_previous_kprobe(kcb);
 		else
@@ -629,9 +630,9 @@ int __kprobes kprobe_fault_handler(struct pt_regs *regs, int trapnr)
 		 * In case the user-specified fault handler returned
 		 * zero, try to fix up.
 		 */
-		fixup = search_exception_tables(regs->rip);
+		fixup = search_exception_tables(regs->ip);
 		if (fixup) {
-			regs->rip = fixup->fixup;
+			regs->ip = fixup->fixup;
 			return 1;
 		}
 
@@ -688,7 +689,7 @@ int __kprobes setjmp_pre_handler(struct kprobe *p, struct pt_regs *regs)
 	struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
 
 	kcb->jprobe_saved_regs = *regs;
-	kcb->jprobe_saved_rsp = (long *) regs->rsp;
+	kcb->jprobe_saved_rsp = (long *) regs->sp;
 	addr = (unsigned long)(kcb->jprobe_saved_rsp);
 	/*
 	 * As Linus pointed out, gcc assumes that the callee
@@ -699,9 +700,9 @@ int __kprobes setjmp_pre_handler(struct kprobe *p, struct pt_regs *regs)
 	 */
 	memcpy(kcb->jprobes_stack, (kprobe_opcode_t *)addr,
 			MIN_STACK_SIZE(addr));
-	regs->eflags &= ~IF_MASK;
+	regs->flags &= ~IF_MASK;
 	trace_hardirqs_off();
-	regs->rip = (unsigned long)(jp->entry);
+	regs->ip = (unsigned long)(jp->entry);
 	return 1;
 }
 
@@ -720,15 +721,15 @@ void __kprobes jprobe_return(void)
 int __kprobes longjmp_break_handler(struct kprobe *p, struct pt_regs *regs)
 {
 	struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
-	u8 *addr = (u8 *) (regs->rip - 1);
+	u8 *addr = (u8 *) (regs->ip - 1);
 	unsigned long stack_addr = (unsigned long)(kcb->jprobe_saved_rsp);
 	struct jprobe *jp = container_of(p, struct jprobe, kp);
 
 	if ((addr > (u8 *) jprobe_return) && (addr < (u8 *) jprobe_return_end)) {
-		if ((unsigned long *)regs->rsp != kcb->jprobe_saved_rsp) {
+		if ((unsigned long *)regs->sp != kcb->jprobe_saved_rsp) {
 			struct pt_regs *saved_regs = &kcb->jprobe_saved_regs;
-			printk("current rsp %p does not match saved rsp %p\n",
+			printk("current sp %p does not match saved sp %p\n",
-			       (long *)regs->rsp, kcb->jprobe_saved_rsp);
+			       (long *)regs->sp, kcb->jprobe_saved_rsp);
 			printk("Saved registers for jprobe %p\n", jp);
 			show_registers(saved_regs);
 			printk("Current registers\n");

arch/x86/kernel/process_32.c

@@ -265,13 +265,13 @@ EXPORT_SYMBOL_GPL(cpu_idle_wait);
  * New with Core Duo processors, MWAIT can take some hints based on CPU
  * capability.
  */
-void mwait_idle_with_hints(unsigned long eax, unsigned long ecx)
+void mwait_idle_with_hints(unsigned long ax, unsigned long cx)
 {
 	if (!need_resched()) {
 		__monitor((void *)&current_thread_info()->flags, 0, 0);
 		smp_mb();
 		if (!need_resched())
-			__mwait(eax, ecx);
+			__mwait(ax, cx);
 	}
 }
 
@@ -320,15 +320,15 @@ void __show_registers(struct pt_regs *regs, int all)
 {
 	unsigned long cr0 = 0L, cr2 = 0L, cr3 = 0L, cr4 = 0L;
 	unsigned long d0, d1, d2, d3, d6, d7;
-	unsigned long esp;
+	unsigned long sp;
 	unsigned short ss, gs;
 
 	if (user_mode_vm(regs)) {
-		esp = regs->esp;
+		sp = regs->sp;
-		ss = regs->xss & 0xffff;
+		ss = regs->ss & 0xffff;
 		savesegment(gs, gs);
 	} else {
-		esp = (unsigned long) (&regs->esp);
+		sp = (unsigned long) (&regs->sp);
 		savesegment(ss, ss);
 		savesegment(gs, gs);
 	}
@@ -341,17 +341,17 @@ void __show_registers(struct pt_regs *regs, int all)
 			init_utsname()->version);
 
 	printk("EIP: %04x:[<%08lx>] EFLAGS: %08lx CPU: %d\n",
-			0xffff & regs->xcs, regs->eip, regs->eflags,
+			0xffff & regs->cs, regs->ip, regs->flags,
 			smp_processor_id());
-	print_symbol("EIP is at %s\n", regs->eip);
+	print_symbol("EIP is at %s\n", regs->ip);
 
 	printk("EAX: %08lx EBX: %08lx ECX: %08lx EDX: %08lx\n",
-		regs->eax, regs->ebx, regs->ecx, regs->edx);
+		regs->ax, regs->bx, regs->cx, regs->dx);
 	printk("ESI: %08lx EDI: %08lx EBP: %08lx ESP: %08lx\n",
-		regs->esi, regs->edi, regs->ebp, esp);
+		regs->si, regs->di, regs->bp, sp);
 	printk(" DS: %04x ES: %04x FS: %04x GS: %04x SS: %04x\n",
-	       regs->xds & 0xffff, regs->xes & 0xffff,
+	       regs->ds & 0xffff, regs->es & 0xffff,
-	       regs->xfs & 0xffff, gs, ss);
+	       regs->fs & 0xffff, gs, ss);
 
 	if (!all)
 		return;
@@ -379,12 +379,12 @@ void __show_registers(struct pt_regs *regs, int all)
 void show_regs(struct pt_regs *regs)
 {
 	__show_registers(regs, 1);
-	show_trace(NULL, regs, &regs->esp);
+	show_trace(NULL, regs, &regs->sp);
 }
 
 /*
- * This gets run with %ebx containing the
+ * This gets run with %bx containing the
- * function to call, and %edx containing
+ * function to call, and %dx containing
  * the "args".
  */
 extern void kernel_thread_helper(void);
@@ -398,16 +398,16 @@ int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
 
 	memset(&regs, 0, sizeof(regs));
 
-	regs.ebx = (unsigned long) fn;
+	regs.bx = (unsigned long) fn;
-	regs.edx = (unsigned long) arg;
+	regs.dx = (unsigned long) arg;
 
-	regs.xds = __USER_DS;
+	regs.ds = __USER_DS;
-	regs.xes = __USER_DS;
+	regs.es = __USER_DS;
-	regs.xfs = __KERNEL_PERCPU;
+	regs.fs = __KERNEL_PERCPU;
-	regs.orig_eax = -1;
+	regs.orig_ax = -1;
-	regs.eip = (unsigned long) kernel_thread_helper;
+	regs.ip = (unsigned long) kernel_thread_helper;
-	regs.xcs = __KERNEL_CS | get_kernel_rpl();
+	regs.cs = __KERNEL_CS | get_kernel_rpl();
-	regs.eflags = X86_EFLAGS_IF | X86_EFLAGS_SF | X86_EFLAGS_PF | 0x2;
+	regs.flags = X86_EFLAGS_IF | X86_EFLAGS_SF | X86_EFLAGS_PF | 0x2;
 
 	/* Ok, create the new process.. */
 	return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, &regs, 0, NULL, NULL);
@@ -470,7 +470,7 @@ void prepare_to_copy(struct task_struct *tsk)
 	unlazy_fpu(tsk);
 }
 
-int copy_thread(int nr, unsigned long clone_flags, unsigned long esp,
+int copy_thread(int nr, unsigned long clone_flags, unsigned long sp,
 	unsigned long unused,
 	struct task_struct * p, struct pt_regs * regs)
 {
@@ -480,8 +480,8 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long esp,
 
 	childregs = task_pt_regs(p);
 	*childregs = *regs;
-	childregs->eax = 0;
+	childregs->ax = 0;
-	childregs->esp = esp;
+	childregs->sp = sp;
 
 	p->thread.esp = (unsigned long) childregs;
 	p->thread.esp0 = (unsigned long) (childregs+1);
@@ -508,7 +508,7 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long esp,
 	 */
 	if (clone_flags & CLONE_SETTLS)
 		err = do_set_thread_area(p, -1,
-			(struct user_desc __user *)childregs->esi, 0);
+			(struct user_desc __user *)childregs->si, 0);
 
 	if (err && p->thread.io_bitmap_ptr) {
 		kfree(p->thread.io_bitmap_ptr);
@@ -527,7 +527,7 @@ void dump_thread(struct pt_regs * regs, struct user * dump)
 /* changed the size calculations - should hopefully work better. lbt */
 	dump->magic = CMAGIC;
 	dump->start_code = 0;
-	dump->start_stack = regs->esp & ~(PAGE_SIZE - 1);
+	dump->start_stack = regs->sp & ~(PAGE_SIZE - 1);
 	dump->u_tsize = ((unsigned long) current->mm->end_code) >> PAGE_SHIFT;
 	dump->u_dsize = ((unsigned long) (current->mm->brk + (PAGE_SIZE-1))) >> PAGE_SHIFT;
 	dump->u_dsize -= dump->u_tsize;
@@ -538,23 +538,23 @@ void dump_thread(struct pt_regs * regs, struct user * dump)
 	if (dump->start_stack < TASK_SIZE)
 		dump->u_ssize = ((unsigned long) (TASK_SIZE - dump->start_stack)) >> PAGE_SHIFT;
 
-	dump->regs.ebx = regs->ebx;
+	dump->regs.ebx = regs->bx;
-	dump->regs.ecx = regs->ecx;
+	dump->regs.ecx = regs->cx;
-	dump->regs.edx = regs->edx;
+	dump->regs.edx = regs->dx;
-	dump->regs.esi = regs->esi;
+	dump->regs.esi = regs->si;
-	dump->regs.edi = regs->edi;
+	dump->regs.edi = regs->di;
-	dump->regs.ebp = regs->ebp;
+	dump->regs.ebp = regs->bp;
-	dump->regs.eax = regs->eax;
+	dump->regs.eax = regs->ax;
-	dump->regs.ds = regs->xds;
+	dump->regs.ds = regs->ds;
-	dump->regs.es = regs->xes;
+	dump->regs.es = regs->es;
-	dump->regs.fs = regs->xfs;
+	dump->regs.fs = regs->fs;
 	savesegment(gs,dump->regs.gs);
-	dump->regs.orig_eax = regs->orig_eax;
+	dump->regs.orig_eax = regs->orig_ax;
-	dump->regs.eip = regs->eip;
+	dump->regs.eip = regs->ip;
-	dump->regs.cs = regs->xcs;
+	dump->regs.cs = regs->cs;
-	dump->regs.eflags = regs->eflags;
+	dump->regs.eflags = regs->flags;
-	dump->regs.esp = regs->esp;
+	dump->regs.esp = regs->sp;
-	dump->regs.ss = regs->xss;
+	dump->regs.ss = regs->ss;
 
 	dump->u_fpvalid = dump_fpu (regs, &dump->i387);
 }
@@ -566,10 +566,10 @@ EXPORT_SYMBOL(dump_thread);
 int dump_task_regs(struct task_struct *tsk, elf_gregset_t *regs)
 {
 	struct pt_regs ptregs = *task_pt_regs(tsk);
-	ptregs.xcs &= 0xffff;
+	ptregs.cs &= 0xffff;
-	ptregs.xds &= 0xffff;
+	ptregs.ds &= 0xffff;
-	ptregs.xes &= 0xffff;
+	ptregs.es &= 0xffff;
-	ptregs.xss &= 0xffff;
+	ptregs.ss &= 0xffff;
 
 	elf_core_copy_regs(regs, &ptregs);
 
@@ -684,7 +684,7 @@ __switch_to_xtra(struct task_struct *prev_p, struct task_struct *next_p,
  * More important, however, is the fact that this allows us much
  * more flexibility.
  *
- * The return value (in %eax) will be the "prev" task after
+ * The return value (in %ax) will be the "prev" task after
  * the task-switch, and shows up in ret_from_fork in entry.S,
  * for example.
  */
@@ -771,7 +771,7 @@ struct task_struct fastcall * __switch_to(struct task_struct *prev_p, struct tas
 
 asmlinkage int sys_fork(struct pt_regs regs)
 {
-	return do_fork(SIGCHLD, regs.esp, &regs, 0, NULL, NULL);
+	return do_fork(SIGCHLD, regs.sp, &regs, 0, NULL, NULL);
 }
 
 asmlinkage int sys_clone(struct pt_regs regs)
@@ -780,12 +780,12 @@ asmlinkage int sys_clone(struct pt_regs regs)
 	unsigned long newsp;
 	int __user *parent_tidptr, *child_tidptr;
 
-	clone_flags = regs.ebx;
+	clone_flags = regs.bx;
-	newsp = regs.ecx;
+	newsp = regs.cx;
-	parent_tidptr = (int __user *)regs.edx;
+	parent_tidptr = (int __user *)regs.dx;
-	child_tidptr = (int __user *)regs.edi;
+	child_tidptr = (int __user *)regs.di;
 	if (!newsp)
-		newsp = regs.esp;
+		newsp = regs.sp;
 	return do_fork(clone_flags, newsp, &regs, 0, parent_tidptr, child_tidptr);
 }
 
@@ -801,7 +801,7 @@ asmlinkage int sys_clone(struct pt_regs regs)
  */
 asmlinkage int sys_vfork(struct pt_regs regs)
 {
-	return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs.esp, &regs, 0, NULL, NULL);
+	return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs.sp, &regs, 0, NULL, NULL);
 }
 
 /*
@@ -812,13 +812,13 @@ asmlinkage int sys_execve(struct pt_regs regs)
 	int error;
 	char * filename;
 
-	filename = getname((char __user *) regs.ebx);
+	filename = getname((char __user *) regs.bx);
 	error = PTR_ERR(filename);
 	if (IS_ERR(filename))
 		goto out;
 	error = do_execve(filename,
-			(char __user * __user *) regs.ecx,
+			(char __user * __user *) regs.cx,
-			(char __user * __user *) regs.edx,
+			(char __user * __user *) regs.dx,
 			&regs);
 	if (error == 0) {
 		/* Make sure we don't return using sysenter.. */
@@ -834,24 +834,24 @@ out:
 
 unsigned long get_wchan(struct task_struct *p)
 {
-	unsigned long ebp, esp, eip;
+	unsigned long bp, sp, ip;
 	unsigned long stack_page;
 	int count = 0;
 	if (!p || p == current || p->state == TASK_RUNNING)
 		return 0;
 	stack_page = (unsigned long)task_stack_page(p);
-	esp = p->thread.esp;
+	sp = p->thread.esp;
-	if (!stack_page || esp < stack_page || esp > top_esp+stack_page)
+	if (!stack_page || sp < stack_page || sp > top_esp+stack_page)
 		return 0;
-	/* include/asm-i386/system.h:switch_to() pushes ebp last. */
+	/* include/asm-i386/system.h:switch_to() pushes bp last. */
-	ebp = *(unsigned long *) esp;
+	bp = *(unsigned long *) sp;
 	do {
-		if (ebp < stack_page || ebp > top_ebp+stack_page)
+		if (bp < stack_page || bp > top_ebp+stack_page)
 			return 0;
-		eip = *(unsigned long *) (ebp+4);
+		ip = *(unsigned long *) (bp+4);
-		if (!in_sched_functions(eip))
+		if (!in_sched_functions(ip))
-			return eip;
+			return ip;
-		ebp = *(unsigned long *) ebp;
+		bp = *(unsigned long *) bp;
 	} while (count++ < 16);
 	return 0;
 }

arch/x86/kernel/process_64.c

@@ -257,13 +257,13 @@ void cpu_idle(void)
  * New with Core Duo processors, MWAIT can take some hints based on CPU
  * capability.
  */
-void mwait_idle_with_hints(unsigned long eax, unsigned long ecx)
+void mwait_idle_with_hints(unsigned long ax, unsigned long cx)
 {
 	if (!need_resched()) {
 		__monitor((void *)&current_thread_info()->flags, 0, 0);
 		smp_mb();
 		if (!need_resched())
-			__mwait(eax, ecx);
+			__mwait(ax, cx);
 	}
 }
 
@@ -330,16 +330,16 @@ void __show_regs(struct pt_regs * regs)
 		init_utsname()->release,
 		(int)strcspn(init_utsname()->version, " "),
 		init_utsname()->version);
-	printk("RIP: %04lx:[<%016lx>] ", regs->cs & 0xffff, regs->rip);
+	printk("RIP: %04lx:[<%016lx>] ", regs->cs & 0xffff, regs->ip);
-	printk_address(regs->rip); 
+	printk_address(regs->ip);
-	printk("RSP: %04lx:%016lx  EFLAGS: %08lx\n", regs->ss, regs->rsp,
+	printk("RSP: %04lx:%016lx  EFLAGS: %08lx\n", regs->ss, regs->sp,
-		regs->eflags);
+		regs->flags);
 	printk("RAX: %016lx RBX: %016lx RCX: %016lx\n",
-	       regs->rax, regs->rbx, regs->rcx);
+	       regs->ax, regs->bx, regs->cx);
 	printk("RDX: %016lx RSI: %016lx RDI: %016lx\n",
-	       regs->rdx, regs->rsi, regs->rdi); 
+	       regs->dx, regs->si, regs->di);
 	printk("RBP: %016lx R08: %016lx R09: %016lx\n",
-	       regs->rbp, regs->r8, regs->r9); 
+	       regs->bp, regs->r8, regs->r9);
 	printk("R10: %016lx R11: %016lx R12: %016lx\n",
 	       regs->r10, regs->r11, regs->r12); 
 	printk("R13: %016lx R14: %016lx R15: %016lx\n",
@@ -476,7 +476,7 @@ void prepare_to_copy(struct task_struct *tsk)
 	unlazy_fpu(tsk);
 }
 
-int copy_thread(int nr, unsigned long clone_flags, unsigned long rsp, 
+int copy_thread(int nr, unsigned long clone_flags, unsigned long sp,
 		unsigned long unused,
 	struct task_struct * p, struct pt_regs * regs)
 {
@@ -488,10 +488,10 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long rsp,
 			(THREAD_SIZE + task_stack_page(p))) - 1;
 	*childregs = *regs;
 
-	childregs->rax = 0;
+	childregs->ax = 0;
-	childregs->rsp = rsp;
+	childregs->sp = sp;
-	if (rsp == ~0UL)
+	if (sp == ~0UL)
-		childregs->rsp = (unsigned long)childregs;
+		childregs->sp = (unsigned long)childregs;
 
 	p->thread.rsp = (unsigned long) childregs;
 	p->thread.rsp0 = (unsigned long) (childregs+1);
@@ -525,7 +525,7 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long rsp,
 #ifdef CONFIG_IA32_EMULATION
 		if (test_thread_flag(TIF_IA32))
 			err = do_set_thread_area(p, -1,
-				(struct user_desc __user *)childregs->rsi, 0);
+				(struct user_desc __user *)childregs->si, 0);
 		else 			
 #endif	 
 			err = do_arch_prctl(p, ARCH_SET_FS, childregs->r8); 
@@ -732,7 +732,7 @@ void set_personality_64bit(void)
 
 asmlinkage long sys_fork(struct pt_regs *regs)
 {
-	return do_fork(SIGCHLD, regs->rsp, regs, 0, NULL, NULL);
+	return do_fork(SIGCHLD, regs->sp, regs, 0, NULL, NULL);
 }
 
 asmlinkage long
@@ -740,7 +740,7 @@ sys_clone(unsigned long clone_flags, unsigned long newsp,
 	  void __user *parent_tid, void __user *child_tid, struct pt_regs *regs)
 {
 	if (!newsp)
-		newsp = regs->rsp;
+		newsp = regs->sp;
 	return do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid);
 }
 
@@ -756,14 +756,14 @@ sys_clone(unsigned long clone_flags, unsigned long newsp,
  */
 asmlinkage long sys_vfork(struct pt_regs *regs)
 {
-	return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->rsp, regs, 0,
+	return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->sp, regs, 0,
 		    NULL, NULL);
 }
 
 unsigned long get_wchan(struct task_struct *p)
 {
 	unsigned long stack;
-	u64 fp,rip;
+	u64 fp,ip;
 	int count = 0;
 
 	if (!p || p == current || p->state==TASK_RUNNING)
@@ -776,9 +776,9 @@ unsigned long get_wchan(struct task_struct *p)
 		if (fp < (unsigned long)stack ||
 		    fp > (unsigned long)stack+THREAD_SIZE)
 			return 0; 
-		rip = *(u64 *)(fp+8); 
+		ip = *(u64 *)(fp+8);
-		if (!in_sched_functions(rip))
+		if (!in_sched_functions(ip))
-			return rip; 
+			return ip;
 		fp = *(u64 *)fp; 
 	} while (count++ < 16); 
 	return 0;