Merge branch 'master' of /pub/scm/linux/kernel/git/torvalds/linux-2.6

11 files changed, 90 insertions, 136 deletions

diff --git a/arch/um/sys-x86_64/bug.c b/arch/um/sys-x86_64/bug.c
index a4360b5207db..e8034e363d83 100644
--- a/arch/um/sys-x86_64/bug.c
+++ b/arch/um/sys-x86_64/bug.c
@@ -5,7 +5,8 @@
 
 #include <linux/uaccess.h>
 
-/* Mostly copied from i386/x86_86 - eliminated the eip < PAGE_OFFSET because
+/*
+ * Mostly copied from i386/x86_86 - eliminated the eip < PAGE_OFFSET because
  * that's not relevant in skas mode.
  */
 
diff --git a/arch/um/sys-x86_64/bugs.c b/arch/um/sys-x86_64/bugs.c
index 506b6765bbcb..44e02ba2a265 100644
--- a/arch/um/sys-x86_64/bugs.c
+++ b/arch/um/sys-x86_64/bugs.c
@@ -6,15 +6,10 @@
 
 #include "sysdep/ptrace.h"
 
-void arch_init_thread(void)
-{
-}
-
 void arch_check_bugs(void)
 {
 }
 
-int arch_handle_signal(int sig, struct uml_pt_regs *regs)
+void arch_examine_signal(int sig, struct uml_pt_regs *regs)
 {
-	return 0;
 }
diff --git a/arch/um/sys-x86_64/ptrace.c b/arch/um/sys-x86_64/ptrace.c
index b7631b0e9ddc..f3458d7d1c5a 100644
--- a/arch/um/sys-x86_64/ptrace.c
+++ b/arch/um/sys-x86_64/ptrace.c
@@ -5,13 +5,12 @@
  * Licensed under the GPL
  */
 
-#define __FRAME_OFFSETS
-#include <asm/ptrace.h>
+#include <linux/mm.h>
 #include <linux/sched.h>
 #include <linux/errno.h>
-#include <linux/mm.h>
+#define __FRAME_OFFSETS
+#include <asm/ptrace.h>
 #include <asm/uaccess.h>
-#include <asm/elf.h>
 
 /*
  * determines which flags the user has access to.
@@ -24,12 +23,14 @@ int putreg(struct task_struct *child, int regno, unsigned long value)
 	unsigned long tmp;
 
 #ifdef TIF_IA32
-	/* Some code in the 64bit emulation may not be 64bit clean.
-	   Don't take any chances. */
+	/*
+	 * Some code in the 64bit emulation may not be 64bit clean.
+	 * Don't take any chances.
+	 */
 	if (test_tsk_thread_flag(child, TIF_IA32))
 		value &= 0xffffffff;
 #endif
-	switch (regno){
+	switch (regno) {
 	case FS:
 	case GS:
 	case DS:
@@ -66,7 +67,7 @@ int poke_user(struct task_struct *child, long addr, long data)
 	if (addr < MAX_REG_OFFSET)
 		return putreg(child, addr, data);
 	else if ((addr >= offsetof(struct user, u_debugreg[0])) &&
-		(addr <= offsetof(struct user, u_debugreg[7]))){
+		(addr <= offsetof(struct user, u_debugreg[7]))) {
 		addr -= offsetof(struct user, u_debugreg[0]);
 		addr = addr >> 2;
 		if ((addr == 4) || (addr == 5))
@@ -108,11 +109,10 @@ int peek_user(struct task_struct *child, long addr, long data)
 		return -EIO;
 
 	tmp = 0;  /* Default return condition */
-	if (addr < MAX_REG_OFFSET){
+	if (addr < MAX_REG_OFFSET)
 		tmp = getreg(child, addr);
-	}
 	else if ((addr >= offsetof(struct user, u_debugreg[0])) &&
-		(addr <= offsetof(struct user, u_debugreg[7]))){
+		(addr <= offsetof(struct user, u_debugreg[7]))) {
 		addr -= offsetof(struct user, u_debugreg[0]);
 		addr = addr >> 2;
 		tmp = child->thread.arch.debugregs[addr];
@@ -127,8 +127,9 @@ int is_syscall(unsigned long addr)
 	int n;
 
 	n = copy_from_user(&instr, (void __user *) addr, sizeof(instr));
-	if (n){
-		/* access_process_vm() grants access to vsyscall and stub,
+	if (n) {
+		/*
+		 * access_process_vm() grants access to vsyscall and stub,
 		 * while copy_from_user doesn't. Maybe access_process_vm is
 		 * slow, but that doesn't matter, since it will be called only
 		 * in case of singlestepping, if copy_from_user failed.
@@ -155,7 +156,7 @@ int get_fpregs(struct user_i387_struct __user *buf, struct task_struct *child)
 		return err;
 
 	n = copy_to_user(buf, fpregs, sizeof(fpregs));
-	if(n > 0)
+	if (n > 0)
 		return -EFAULT;
 
 	return n;
diff --git a/arch/um/sys-x86_64/ptrace_user.c b/arch/um/sys-x86_64/ptrace_user.c
index b5f9c33e311e..c57a496d3f5b 100644
--- a/arch/um/sys-x86_64/ptrace_user.c
+++ b/arch/um/sys-x86_64/ptrace_user.c
@@ -4,55 +4,19 @@
  * Licensed under the GPL
  */
 
-#include <stddef.h>
 #include <errno.h>
 #include "ptrace_user.h"
-#include "user.h"
-#include "kern_constants.h"
 
 int ptrace_getregs(long pid, unsigned long *regs_out)
 {
-	if(ptrace(PTRACE_GETREGS, pid, 0, regs_out) < 0)
-		return(-errno);
-	return(0);
-}
-
-int ptrace_setregs(long pid, unsigned long *regs)
-{
-	if(ptrace(PTRACE_SETREGS, pid, 0, regs) < 0)
-		return(-errno);
+	if (ptrace(PTRACE_GETREGS, pid, 0, regs_out) < 0)
+		return -errno;
 	return(0);
 }
 
-int ptrace_setfpregs(long pid, unsigned long *regs)
+int ptrace_setregs(long pid, unsigned long *regs_out)
 {
-	if (ptrace(PTRACE_SETFPREGS, pid, 0, regs) < 0)
+	if (ptrace(PTRACE_SETREGS, pid, 0, regs_out) < 0)
 		return -errno;
-	return 0;
-}
-
-void ptrace_pokeuser(unsigned long addr, unsigned long data)
-{
-	panic("ptrace_pokeuser");
-}
-
-#define DS 184
-#define ES 192
-#define __USER_DS     0x2b
-
-void arch_enter_kernel(void *task, int pid)
-{
-}
-
-void arch_leave_kernel(void *task, int pid)
-{
-#ifdef UM_USER_CS
-        if(ptrace(PTRACE_POKEUSR, pid, CS, UM_USER_CS) < 0)
-                printk("POKEUSR CS failed");
-#endif
-
-        if(ptrace(PTRACE_POKEUSR, pid, DS, __USER_DS) < 0)
-                printk("POKEUSR DS failed");
-        if(ptrace(PTRACE_POKEUSR, pid, ES, __USER_DS) < 0)
-                printk("POKEUSR ES failed");
+	return(0);
 }
diff --git a/arch/um/sys-x86_64/signal.c b/arch/um/sys-x86_64/signal.c
index 14070181407b..1a899a7ed7a6 100644
--- a/arch/um/sys-x86_64/signal.c
+++ b/arch/um/sys-x86_64/signal.c
@@ -81,7 +81,7 @@ static int copy_sc_from_user(struct pt_regs *regs,
 	if (err)
 		return 1;
 
-	err = restore_fp_registers(userspace_pid[current_thread->cpu],
+	err = restore_fp_registers(userspace_pid[current_thread_info()->cpu],
 				   (unsigned long *) &fp);
 	if (err < 0) {
 		printk(KERN_ERR "copy_sc_from_user - "
@@ -143,7 +143,7 @@ static int copy_sc_to_user(struct sigcontext __user *to,
 	if (err)
 		return 1;
 
-	err = save_fp_registers(userspace_pid[current_thread->cpu],
+	err = save_fp_registers(userspace_pid[current_thread_info()->cpu],
 				(unsigned long *) &fp);
 	if (err < 0) {
 		printk(KERN_ERR "copy_sc_from_user - restore_fp_registers "
diff --git a/arch/um/sys-x86_64/stub.S b/arch/um/sys-x86_64/stub.S
index 4afe204a6af7..568768763155 100644
--- a/arch/um/sys-x86_64/stub.S
+++ b/arch/um/sys-x86_64/stub.S
@@ -8,18 +8,18 @@ syscall_stub:
 	/* We don't have 64-bit constants, so this constructs the address
 	 * we need.
 	 */
-	movq	$(ASM_STUB_DATA >> 32), %rbx
+	movq	$(STUB_DATA >> 32), %rbx
 	salq	$32, %rbx
-	movq	$(ASM_STUB_DATA & 0xffffffff), %rcx
+	movq	$(STUB_DATA & 0xffffffff), %rcx
 	or	%rcx, %rbx
 	movq	%rax, (%rbx)
 	int3
 
 	.globl batch_syscall_stub
 batch_syscall_stub:
-	mov	$(ASM_STUB_DATA >> 32), %rbx
+	mov	$(STUB_DATA >> 32), %rbx
 	sal	$32, %rbx
-	mov	$(ASM_STUB_DATA & 0xffffffff), %rax
+	mov	$(STUB_DATA & 0xffffffff), %rax
 	or	%rax, %rbx
 	/* load pointer to first operation */
 	mov	%rbx, %rsp
diff --git a/arch/um/sys-x86_64/stub_segv.c b/arch/um/sys-x86_64/stub_segv.c
index 3afb590f0072..ced051afc705 100644
--- a/arch/um/sys-x86_64/stub_segv.c
+++ b/arch/um/sys-x86_64/stub_segv.c
@@ -1,51 +1,22 @@
 /*
- * Copyright (C) 2004 Jeff Dike (jdike@addtoit.com)
+ * Copyright (C) 2004 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
  * Licensed under the GPL
  */
 
-#include <stddef.h>
 #include <signal.h>
-#include <asm/unistd.h>
 #include "as-layout.h"
-#include "uml-config.h"
-#include "sysdep/sigcontext.h"
-#include "sysdep/faultinfo.h"
 #include "sysdep/stub.h"
-
-/* Copied from sys-x86_64/signal.c - Can't find an equivalent definition
- * in the libc headers anywhere.
- */
-struct rt_sigframe
-{
-	char *pretcode;
-	struct ucontext uc;
-	struct siginfo info;
-};
-
-/* Copied here from <linux/kernel.h> - we're userspace. */
-#define container_of(ptr, type, member) ({                   \
-	const typeof( ((type *)0)->member ) *__mptr = (ptr); \
-	(type *)( (char *)__mptr - offsetof(type,member) );})
+#include "sysdep/faultinfo.h"
+#include "sysdep/sigcontext.h"
 
 void __attribute__ ((__section__ (".__syscall_stub")))
 stub_segv_handler(int sig)
 {
 	struct ucontext *uc;
-        int pid;
 
 	__asm__ __volatile__("movq %%rdx, %0" : "=g" (uc) :);
 	GET_FAULTINFO_FROM_SC(*((struct faultinfo *) STUB_DATA),
 			      &uc->uc_mcontext);
-
-	pid = stub_syscall0(__NR_getpid);
-	stub_syscall2(__NR_kill, pid, SIGUSR1);
-
-	/* sys_sigreturn expects that the stack pointer will be 8 bytes into
-	 * the signal frame.  So, we use the ucontext pointer, which we know
-	 * already, to get the signal frame pointer, and add 8 to that.
-	 */
-	__asm__ __volatile__("movq %0, %%rsp; movq %1, %%rax ; syscall": :
-                             "g" ((unsigned long)
-                                  container_of(uc, struct rt_sigframe, uc) + 8),
-                             "g" (__NR_rt_sigreturn));
+	trap_myself();
 }
+
diff --git a/arch/um/sys-x86_64/syscall_table.c b/arch/um/sys-x86_64/syscall_table.c
index 71b2ae4ad5de..c128eb897008 100644
--- a/arch/um/sys-x86_64/syscall_table.c
+++ b/arch/um/sys-x86_64/syscall_table.c
@@ -1,5 +1,7 @@
-/* System call table for UML/x86-64, copied from arch/x86_64/kernel/syscall.c
- * with some changes for UML. */
+/*
+ * System call table for UML/x86-64, copied from arch/x86_64/kernel/syscall.c
+ * with some changes for UML.
+ */
 
 #include <linux/linkage.h>
 #include <linux/sys.h>
@@ -8,22 +10,26 @@
 
 #define __NO_STUBS
 
-/* Below you can see, in terms of #define's, the differences between the x86-64
- * and the UML syscall table. */
+/*
+ * Below you can see, in terms of #define's, the differences between the x86-64
+ * and the UML syscall table.
+ */
 
 /* Not going to be implemented by UML, since we have no hardware. */
 #define stub_iopl sys_ni_syscall
 #define sys_ioperm sys_ni_syscall
 
-/* The UML TLS problem. Note that x86_64 does not implement this, so the below
- * is needed only for the ia32 compatibility. */
-/*#define sys_set_thread_area sys_ni_syscall
-#define sys_get_thread_area sys_ni_syscall*/
+/*
+ * The UML TLS problem. Note that x86_64 does not implement this, so the below
+ * is needed only for the ia32 compatibility.
+ */
 
 /* On UML we call it this way ("old" means it's not mmap2) */
 #define sys_mmap old_mmap
-/* On x86-64 sys_uname is actually sys_newuname plus a compatibility trick.
- * See arch/x86_64/kernel/sys_x86_64.c */
+/*
+ * On x86-64 sys_uname is actually sys_newuname plus a compatibility trick.
+ * See arch/x86_64/kernel/sys_x86_64.c
+ */
 #define sys_uname sys_uname64
 
 #define stub_clone sys_clone
@@ -46,8 +52,19 @@ typedef void (*sys_call_ptr_t)(void);
 
 extern void sys_ni_syscall(void);
 
-sys_call_ptr_t sys_call_table[UM_NR_syscall_max+1] __cacheline_aligned = {
-	/* Smells like a like a compiler bug -- it doesn't work when the & below is removed. */
-	[0 ... UM_NR_syscall_max] = &sys_ni_syscall,
+/*
+ * We used to have a trick here which made sure that holes in the
+ * x86_64 table were filled in with sys_ni_syscall, but a comment in
+ * unistd_64.h says that holes aren't allowed, so the trick was
+ * removed.
+ * The trick looked like this
+ *	[0 ... UM_NR_syscall_max] = &sys_ni_syscall
+ * before including unistd_64.h - the later initializations overwrote
+ * the sys_ni_syscall filler.
+ */
+
+sys_call_ptr_t sys_call_table[] __cacheline_aligned = {
 #include <asm-x86/unistd_64.h>
 };
+
+int syscall_table_size = sizeof(sys_call_table);
diff --git a/arch/um/sys-x86_64/syscalls.c b/arch/um/sys-x86_64/syscalls.c
index 86f6b18410ee..f1199fd34d38 100644
--- a/arch/um/sys-x86_64/syscalls.c
+++ b/arch/um/sys-x86_64/syscalls.c
@@ -48,7 +48,9 @@ long arch_prctl(struct task_struct *task, int code, unsigned long __user *addr)
 	switch (code) {
 	case ARCH_SET_FS:
 	case ARCH_SET_GS:
-		restore_registers(pid, &current->thread.regs.regs);
+		ret = restore_registers(pid, &current->thread.regs.regs);
+		if (ret)
+			return ret;
 		break;
 	case ARCH_GET_FS:
 	case ARCH_GET_GS:
@@ -70,10 +72,10 @@ long arch_prctl(struct task_struct *task, int code, unsigned long __user *addr)
 	switch (code) {
 	case ARCH_SET_FS:
 		current->thread.arch.fs = (unsigned long) ptr;
-		save_registers(pid, &current->thread.regs.regs);
+		ret = save_registers(pid, &current->thread.regs.regs);
 		break;
 	case ARCH_SET_GS:
-		save_registers(pid, &current->thread.regs.regs);
+		ret = save_registers(pid, &current->thread.regs.regs);
 		break;
 	case ARCH_GET_FS:
 		ret = put_user(tmp, addr);
@@ -105,7 +107,7 @@ long sys_clone(unsigned long clone_flags, unsigned long newsp,
 	return ret;
 }
 
-void arch_switch_to(struct task_struct *from, struct task_struct *to)
+void arch_switch_to(struct task_struct *to)
 {
 	if ((to->thread.arch.fs == 0) || (to->mm == NULL))
 		return;
diff --git a/arch/um/sys-x86_64/sysrq.c b/arch/um/sys-x86_64/sysrq.c
index 765444031819..f4f82beb3508 100644
--- a/arch/um/sys-x86_64/sysrq.c
+++ b/arch/um/sys-x86_64/sysrq.c
@@ -4,32 +4,33 @@
  * Licensed under the GPL
  */
 
-#include "linux/kernel.h"
-#include "linux/utsname.h"
-#include "linux/module.h"
-#include "asm/current.h"
-#include "asm/ptrace.h"
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/utsname.h>
+#include <asm/current.h>
+#include <asm/ptrace.h>
 #include "sysrq.h"
 
-void __show_regs(struct pt_regs * regs)
+void __show_regs(struct pt_regs *regs)
 {
 	printk("\n");
 	print_modules();
-	printk("Pid: %d, comm: %.20s %s %s\n", task_pid_nr(current),
+	printk(KERN_INFO "Pid: %d, comm: %.20s %s %s\n", task_pid_nr(current),
 		current->comm, print_tainted(), init_utsname()->release);
-	printk("RIP: %04lx:[<%016lx>] ", PT_REGS_CS(regs) & 0xffff,
+	printk(KERN_INFO "RIP: %04lx:[<%016lx>]\n", PT_REGS_CS(regs) & 0xffff,
 	       PT_REGS_RIP(regs));
-	printk("\nRSP: %016lx  EFLAGS: %08lx\n", PT_REGS_RSP(regs),
+	printk(KERN_INFO "RSP: %016lx  EFLAGS: %08lx\n", PT_REGS_RSP(regs),
 	       PT_REGS_EFLAGS(regs));
-	printk("RAX: %016lx RBX: %016lx RCX: %016lx\n",
+	printk(KERN_INFO "RAX: %016lx RBX: %016lx RCX: %016lx\n",
 	       PT_REGS_RAX(regs), PT_REGS_RBX(regs), PT_REGS_RCX(regs));
-	printk("RDX: %016lx RSI: %016lx RDI: %016lx\n",
+	printk(KERN_INFO "RDX: %016lx RSI: %016lx RDI: %016lx\n",
 	       PT_REGS_RDX(regs), PT_REGS_RSI(regs), PT_REGS_RDI(regs));
-	printk("RBP: %016lx R08: %016lx R09: %016lx\n",
+	printk(KERN_INFO "RBP: %016lx R08: %016lx R09: %016lx\n",
 	       PT_REGS_RBP(regs), PT_REGS_R8(regs), PT_REGS_R9(regs));
-	printk("R10: %016lx R11: %016lx R12: %016lx\n",
+	printk(KERN_INFO "R10: %016lx R11: %016lx R12: %016lx\n",
 	       PT_REGS_R10(regs), PT_REGS_R11(regs), PT_REGS_R12(regs));
-	printk("R13: %016lx R14: %016lx R15: %016lx\n",
+	printk(KERN_INFO "R13: %016lx R14: %016lx R15: %016lx\n",
 	       PT_REGS_R13(regs), PT_REGS_R14(regs), PT_REGS_R15(regs));
 }
 
diff --git a/arch/um/sys-x86_64/um_module.c b/arch/um/sys-x86_64/um_module.c
index 8b8eff1bd977..3dead392a415 100644
--- a/arch/um/sys-x86_64/um_module.c
+++ b/arch/um/sys-x86_64/um_module.c
@@ -1,7 +1,7 @@
 #include <linux/vmalloc.h>
 #include <linux/moduleloader.h>
 
-/*Copied from i386 arch/i386/kernel/module.c */
+/* Copied from i386 arch/i386/kernel/module.c */
 void *module_alloc(unsigned long size)
 {
 	if (size == 0)
@@ -13,7 +13,9 @@ void *module_alloc(unsigned long size)
 void module_free(struct module *mod, void *module_region)
 {
 	vfree(module_region);
-	/* FIXME: If module_region == mod->init_region, trim exception
-           table entries. */
+	/*
+	 * FIXME: If module_region == mod->init_region, trim exception
+	 * table entries.
+	 */
 }