#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/user.h>
-#include <linux/a.out.h>
#include <linux/interrupt.h>
#include <linux/utsname.h>
#include <linux/delay.h>
#include <linux/personality.h>
#include <linux/tick.h>
#include <linux/percpu.h>
+#include <linux/prctl.h>
+#include <linux/dmi.h>
+#include <linux/ftrace.h>
+#include <linux/uaccess.h>
+#include <linux/io.h>
+#include <linux/kdebug.h>
-#include <asm/uaccess.h>
#include <asm/pgtable.h>
#include <asm/system.h>
-#include <asm/io.h>
#include <asm/ldt.h>
#include <asm/processor.h>
#include <asm/i387.h>
#include <asm/desc.h>
-#include <asm/vm86.h>
#ifdef CONFIG_MATH_EMULATION
#include <asm/math_emu.h>
#endif
#include <asm/tlbflush.h>
#include <asm/cpu.h>
+#include <asm/idle.h>
+#include <asm/syscalls.h>
+#include <asm/ds.h>
asmlinkage void ret_from_fork(void) __asm__("ret_from_fork");
-static int hlt_counter;
-
-unsigned long boot_option_idle_override = 0;
-EXPORT_SYMBOL(boot_option_idle_override);
-
DEFINE_PER_CPU(struct task_struct *, current_task) = &init_task;
EXPORT_PER_CPU_SYMBOL(current_task);
*/
unsigned long thread_saved_pc(struct task_struct *tsk)
{
- return ((unsigned long *)tsk->thread.esp)[3];
-}
-
-/*
- * Powermanagement idle function, if any..
- */
-void (*pm_idle)(void);
-EXPORT_SYMBOL(pm_idle);
-static DEFINE_PER_CPU(unsigned int, cpu_idle_state);
-
-void disable_hlt(void)
-{
- hlt_counter++;
-}
-
-EXPORT_SYMBOL(disable_hlt);
-
-void enable_hlt(void)
-{
- hlt_counter--;
+ return ((unsigned long *)tsk->thread.sp)[3];
}
-EXPORT_SYMBOL(enable_hlt);
-
-/*
- * We use this if we don't have any better
- * idle routine..
- */
-void default_idle(void)
-{
- if (!hlt_counter && boot_cpu_data.hlt_works_ok) {
- current_thread_info()->status &= ~TS_POLLING;
- /*
- * TS_POLLING-cleared state must be visible before we
- * test NEED_RESCHED:
- */
- smp_mb();
-
- local_irq_disable();
- if (!need_resched())
- safe_halt(); /* enables interrupts racelessly */
- else
- local_irq_enable();
- current_thread_info()->status |= TS_POLLING;
- } else {
- /* loop is done by the caller */
- cpu_relax();
- }
-}
-#ifdef CONFIG_APM_MODULE
-EXPORT_SYMBOL(default_idle);
-#endif
-
-/*
- * On SMP it's slightly faster (but much more power-consuming!)
- * to poll the ->work.need_resched flag instead of waiting for the
- * cross-CPU IPI to arrive. Use this option with caution.
- */
-static void poll_idle (void)
-{
- cpu_relax();
-}
-
-#ifdef CONFIG_HOTPLUG_CPU
-#include <asm/nmi.h>
-/* We don't actually take CPU down, just spin without interrupts. */
-static inline void play_dead(void)
-{
- /* This must be done before dead CPU ack */
- cpu_exit_clear();
- wbinvd();
- mb();
- /* Ack it */
- __get_cpu_var(cpu_state) = CPU_DEAD;
-
- /*
- * With physical CPU hotplug, we should halt the cpu
- */
- local_irq_disable();
- while (1)
- halt();
-}
-#else
+#ifndef CONFIG_SMP
static inline void play_dead(void)
{
BUG();
}
-#endif /* CONFIG_HOTPLUG_CPU */
+#endif
/*
* The idle thread. There's no useful work to be
/* endless idle loop with no priority at all */
while (1) {
- tick_nohz_stop_sched_tick();
+ tick_nohz_stop_sched_tick(1);
while (!need_resched()) {
- void (*idle)(void);
-
- if (__get_cpu_var(cpu_idle_state))
- __get_cpu_var(cpu_idle_state) = 0;
check_pgt_cache();
rmb();
- idle = pm_idle;
- if (!idle)
- idle = default_idle;
+ if (rcu_pending(cpu))
+ rcu_check_callbacks(cpu, 0);
if (cpu_is_offline(cpu))
play_dead();
+ local_irq_disable();
__get_cpu_var(irq_stat).idle_timestamp = jiffies;
- idle();
+ /* Don't trace irqs off for idle */
+ stop_critical_timings();
+ pm_idle();
+ start_critical_timings();
}
tick_nohz_restart_sched_tick();
preempt_enable_no_resched();
}
}
-void cpu_idle_wait(void)
+void __show_regs(struct pt_regs *regs, int all)
{
- unsigned int cpu, this_cpu = get_cpu();
- cpumask_t map, tmp = current->cpus_allowed;
-
- set_cpus_allowed(current, cpumask_of_cpu(this_cpu));
- put_cpu();
-
- cpus_clear(map);
- for_each_online_cpu(cpu) {
- per_cpu(cpu_idle_state, cpu) = 1;
- cpu_set(cpu, map);
- }
-
- __get_cpu_var(cpu_idle_state) = 0;
-
- wmb();
- do {
- ssleep(1);
- for_each_online_cpu(cpu) {
- if (cpu_isset(cpu, map) && !per_cpu(cpu_idle_state, cpu))
- cpu_clear(cpu, map);
- }
- cpus_and(map, map, cpu_online_map);
- } while (!cpus_empty(map));
-
- set_cpus_allowed(current, tmp);
-}
-EXPORT_SYMBOL_GPL(cpu_idle_wait);
-
-/*
- * This uses new MONITOR/MWAIT instructions on P4 processors with PNI,
- * which can obviate IPI to trigger checking of need_resched.
- * We execute MONITOR against need_resched and enter optimized wait state
- * through MWAIT. Whenever someone changes need_resched, we would be woken
- * up from MWAIT (without an IPI).
- *
- * 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)
-{
- if (!need_resched()) {
- __monitor((void *)¤t_thread_info()->flags, 0, 0);
- smp_mb();
- if (!need_resched())
- __mwait(eax, ecx);
- }
-}
-
-/* Default MONITOR/MWAIT with no hints, used for default C1 state */
-static void mwait_idle(void)
-{
- local_irq_enable();
- mwait_idle_with_hints(0, 0);
-}
-
-void __devinit select_idle_routine(const struct cpuinfo_x86 *c)
-{
- if (cpu_has(c, X86_FEATURE_MWAIT)) {
- printk("monitor/mwait feature present.\n");
- /*
- * Skip, if setup has overridden idle.
- * One CPU supports mwait => All CPUs supports mwait
- */
- if (!pm_idle) {
- printk("using mwait in idle threads.\n");
- pm_idle = mwait_idle;
- }
+ unsigned long cr0 = 0L, cr2 = 0L, cr3 = 0L, cr4 = 0L;
+ unsigned long d0, d1, d2, d3, d6, d7;
+ unsigned long sp;
+ unsigned short ss, gs;
+ const char *board;
+
+ if (user_mode_vm(regs)) {
+ sp = regs->sp;
+ ss = regs->ss & 0xffff;
+ savesegment(gs, gs);
+ } else {
+ sp = (unsigned long) (®s->sp);
+ savesegment(ss, ss);
+ savesegment(gs, gs);
}
-}
-static int __init idle_setup(char *str)
-{
- if (!strcmp(str, "poll")) {
- printk("using polling idle threads.\n");
- pm_idle = poll_idle;
-#ifdef CONFIG_X86_SMP
- if (smp_num_siblings > 1)
- printk("WARNING: polling idle and HT enabled, performance may degrade.\n");
-#endif
- } else if (!strcmp(str, "mwait"))
- force_mwait = 1;
- else
- return -1;
+ printk("\n");
- boot_option_idle_override = 1;
- return 0;
-}
-early_param("idle", idle_setup);
+ board = dmi_get_system_info(DMI_PRODUCT_NAME);
+ if (!board)
+ board = "";
+ printk("Pid: %d, comm: %s %s (%s %.*s) %s\n",
+ task_pid_nr(current), current->comm,
+ print_tainted(), init_utsname()->release,
+ (int)strcspn(init_utsname()->version, " "),
+ init_utsname()->version, board);
-void show_regs(struct pt_regs * regs)
-{
- unsigned long cr0 = 0L, cr2 = 0L, cr3 = 0L, cr4 = 0L;
- unsigned long d0, d1, d2, d3, d6, d7;
+ printk("EIP: %04x:[<%08lx>] EFLAGS: %08lx CPU: %d\n",
+ (u16)regs->cs, regs->ip, regs->flags,
+ smp_processor_id());
+ print_symbol("EIP is at %s\n", regs->ip);
- printk("\n");
- printk("Pid: %d, comm: %20s\n", current->pid, current->comm);
- printk("EIP: %04x:[<%08lx>] CPU: %d\n",0xffff & regs->xcs,regs->eip, smp_processor_id());
- print_symbol("EIP is at %s\n", regs->eip);
-
- if (user_mode_vm(regs))
- printk(" ESP: %04x:%08lx",0xffff & regs->xss,regs->esp);
- printk(" EFLAGS: %08lx %s (%s %.*s)\n",
- regs->eflags, print_tainted(), init_utsname()->release,
- (int)strcspn(init_utsname()->version, " "),
- init_utsname()->version);
printk("EAX: %08lx EBX: %08lx ECX: %08lx EDX: %08lx\n",
- regs->eax,regs->ebx,regs->ecx,regs->edx);
- printk("ESI: %08lx EDI: %08lx EBP: %08lx",
- regs->esi, regs->edi, regs->ebp);
- printk(" DS: %04x ES: %04x FS: %04x\n",
- 0xffff & regs->xds,0xffff & regs->xes, 0xffff & regs->xfs);
+ regs->ax, regs->bx, regs->cx, regs->dx);
+ printk("ESI: %08lx EDI: %08lx EBP: %08lx ESP: %08lx\n",
+ regs->si, regs->di, regs->bp, sp);
+ printk(" DS: %04x ES: %04x FS: %04x GS: %04x SS: %04x\n",
+ (u16)regs->ds, (u16)regs->es, (u16)regs->fs, gs, ss);
+
+ if (!all)
+ return;
cr0 = read_cr0();
cr2 = read_cr2();
cr3 = read_cr3();
cr4 = read_cr4_safe();
- printk("CR0: %08lx CR2: %08lx CR3: %08lx CR4: %08lx\n", cr0, cr2, cr3, cr4);
+ printk("CR0: %08lx CR2: %08lx CR3: %08lx CR4: %08lx\n",
+ cr0, cr2, cr3, cr4);
get_debugreg(d0, 0);
get_debugreg(d1, 1);
get_debugreg(d3, 3);
printk("DR0: %08lx DR1: %08lx DR2: %08lx DR3: %08lx\n",
d0, d1, d2, d3);
+
get_debugreg(d6, 6);
get_debugreg(d7, 7);
- printk("DR6: %08lx DR7: %08lx\n", d6, d7);
+ printk("DR6: %08lx DR7: %08lx\n",
+ d6, d7);
+}
- show_trace(NULL, regs, ®s->esp);
+void show_regs(struct pt_regs *regs)
+{
+ __show_regs(regs, 1);
+ show_trace(NULL, regs, ®s->sp, regs->bp);
}
/*
- * This gets run with %ebx containing the
- * function to call, and %edx containing
+ * This gets run with %bx containing the
+ * function to call, and %dx containing
* the "args".
*/
extern void kernel_thread_helper(void);
/*
* Create a kernel thread
*/
-int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
+int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags)
{
struct pt_regs regs;
memset(®s, 0, sizeof(regs));
- regs.ebx = (unsigned long) fn;
- regs.edx = (unsigned long) arg;
+ regs.bx = (unsigned long) fn;
+ regs.dx = (unsigned long) arg;
- regs.xds = __USER_DS;
- regs.xes = __USER_DS;
- regs.xfs = __KERNEL_PERCPU;
- regs.orig_eax = -1;
- regs.eip = (unsigned long) kernel_thread_helper;
- regs.xcs = __KERNEL_CS | get_kernel_rpl();
- regs.eflags = X86_EFLAGS_IF | X86_EFLAGS_SF | X86_EFLAGS_PF | 0x2;
+ regs.ds = __USER_DS;
+ regs.es = __USER_DS;
+ regs.fs = __KERNEL_PERCPU;
+ regs.orig_ax = -1;
+ regs.ip = (unsigned long) kernel_thread_helper;
+ regs.cs = __KERNEL_CS | get_kernel_rpl();
+ 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, ®s, 0, NULL, NULL);
tss->x86_tss.io_bitmap_base = INVALID_IO_BITMAP_OFFSET;
put_cpu();
}
+
+ ds_exit_thread(current);
}
void flush_thread(void)
{
struct task_struct *tsk = current;
- memset(tsk->thread.debugreg, 0, sizeof(unsigned long)*8);
- memset(tsk->thread.tls_array, 0, sizeof(tsk->thread.tls_array));
+ tsk->thread.debugreg0 = 0;
+ tsk->thread.debugreg1 = 0;
+ tsk->thread.debugreg2 = 0;
+ tsk->thread.debugreg3 = 0;
+ tsk->thread.debugreg6 = 0;
+ tsk->thread.debugreg7 = 0;
+ memset(tsk->thread.tls_array, 0, sizeof(tsk->thread.tls_array));
clear_tsk_thread_flag(tsk, TIF_DEBUG);
/*
* Forget coprocessor state..
*/
+ tsk->fpu_counter = 0;
clear_fpu(tsk);
clear_used_math();
}
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)
+ struct task_struct *p, struct pt_regs *regs)
{
- struct pt_regs * childregs;
+ struct pt_regs *childregs;
struct task_struct *tsk;
int err;
childregs = task_pt_regs(p);
*childregs = *regs;
- childregs->eax = 0;
- childregs->esp = esp;
+ childregs->ax = 0;
+ childregs->sp = sp;
- p->thread.esp = (unsigned long) childregs;
- p->thread.esp0 = (unsigned long) (childregs+1);
+ p->thread.sp = (unsigned long) childregs;
+ p->thread.sp0 = (unsigned long) (childregs+1);
- p->thread.eip = (unsigned long) ret_from_fork;
+ p->thread.ip = (unsigned long) ret_from_fork;
- savesegment(gs,p->thread.gs);
+ savesegment(gs, p->thread.gs);
tsk = current;
if (unlikely(test_tsk_thread_flag(tsk, TIF_IO_BITMAP))) {
set_tsk_thread_flag(p, TIF_IO_BITMAP);
}
+ err = 0;
+
/*
* Set a new TLS for the child thread?
*/
- if (clone_flags & CLONE_SETTLS) {
- struct desc_struct *desc;
- struct user_desc info;
- int idx;
-
- err = -EFAULT;
- if (copy_from_user(&info, (void __user *)childregs->esi, sizeof(info)))
- goto out;
- err = -EINVAL;
- if (LDT_empty(&info))
- goto out;
-
- idx = info.entry_number;
- if (idx < GDT_ENTRY_TLS_MIN || idx > GDT_ENTRY_TLS_MAX)
- goto out;
-
- desc = p->thread.tls_array + idx - GDT_ENTRY_TLS_MIN;
- desc->a = LDT_entry_a(&info);
- desc->b = LDT_entry_b(&info);
- }
+ if (clone_flags & CLONE_SETTLS)
+ err = do_set_thread_area(p, -1,
+ (struct user_desc __user *)childregs->si, 0);
- err = 0;
- out:
if (err && p->thread.io_bitmap_ptr) {
kfree(p->thread.io_bitmap_ptr);
p->thread.io_bitmap_max = 0;
}
- return err;
-}
-/*
- * fill in the user structure for a core dump..
- */
-void dump_thread(struct pt_regs * regs, struct user * dump)
-{
- int i;
-
-/* 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->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;
- dump->u_ssize = 0;
- for (i = 0; i < 8; i++)
- dump->u_debugreg[i] = current->thread.debugreg[i];
-
- 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.ecx = regs->ecx;
- dump->regs.edx = regs->edx;
- dump->regs.esi = regs->esi;
- dump->regs.edi = regs->edi;
- dump->regs.ebp = regs->ebp;
- dump->regs.eax = regs->eax;
- dump->regs.ds = regs->xds;
- dump->regs.es = regs->xes;
- dump->regs.fs = regs->xfs;
- savesegment(gs,dump->regs.gs);
- dump->regs.orig_eax = regs->orig_eax;
- dump->regs.eip = regs->eip;
- dump->regs.cs = regs->xcs;
- dump->regs.eflags = regs->eflags;
- dump->regs.esp = regs->esp;
- dump->regs.ss = regs->xss;
-
- dump->u_fpvalid = dump_fpu (regs, &dump->i387);
-}
-EXPORT_SYMBOL(dump_thread);
+ ds_copy_thread(p, current);
-/*
- * 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.xcs &= 0xffff;
- ptregs.xds &= 0xffff;
- ptregs.xes &= 0xffff;
- ptregs.xss &= 0xffff;
+ clear_tsk_thread_flag(p, TIF_DEBUGCTLMSR);
+ p->thread.debugctlmsr = 0;
- elf_core_copy_regs(regs, &ptregs);
+ return err;
+}
- return 1;
+void
+start_thread(struct pt_regs *regs, unsigned long new_ip, unsigned long new_sp)
+{
+ __asm__("movl %0, %%gs" : : "r"(0));
+ regs->fs = 0;
+ set_fs(USER_DS);
+ regs->ds = __USER_DS;
+ regs->es = __USER_DS;
+ regs->ss = __USER_DS;
+ regs->cs = __USER_CS;
+ regs->ip = new_ip;
+ regs->sp = new_sp;
+ /*
+ * Free the old FP and other extended state
+ */
+ free_thread_xstate(current);
}
+EXPORT_SYMBOL_GPL(start_thread);
-#ifdef CONFIG_SECCOMP
-void hard_disable_TSC(void)
+static void hard_disable_TSC(void)
{
write_cr4(read_cr4() | X86_CR4_TSD);
}
+
void disable_TSC(void)
{
preempt_disable();
hard_disable_TSC();
preempt_enable();
}
-void hard_enable_TSC(void)
+
+static void hard_enable_TSC(void)
{
write_cr4(read_cr4() & ~X86_CR4_TSD);
}
-#endif /* CONFIG_SECCOMP */
+
+static void enable_TSC(void)
+{
+ preempt_disable();
+ if (test_and_clear_thread_flag(TIF_NOTSC))
+ /*
+ * Must flip the CPU state synchronously with
+ * TIF_NOTSC in the current running context.
+ */
+ hard_enable_TSC();
+ preempt_enable();
+}
+
+int get_tsc_mode(unsigned long adr)
+{
+ unsigned int val;
+
+ if (test_thread_flag(TIF_NOTSC))
+ val = PR_TSC_SIGSEGV;
+ else
+ val = PR_TSC_ENABLE;
+
+ return put_user(val, (unsigned int __user *)adr);
+}
+
+int set_tsc_mode(unsigned int val)
+{
+ if (val == PR_TSC_SIGSEGV)
+ disable_TSC();
+ else if (val == PR_TSC_ENABLE)
+ enable_TSC();
+ else
+ return -EINVAL;
+
+ return 0;
+}
static noinline void
__switch_to_xtra(struct task_struct *prev_p, struct task_struct *next_p,
struct tss_struct *tss)
{
- struct thread_struct *next;
+ struct thread_struct *prev, *next;
+ prev = &prev_p->thread;
next = &next_p->thread;
+ if (test_tsk_thread_flag(next_p, TIF_DS_AREA_MSR) ||
+ test_tsk_thread_flag(prev_p, TIF_DS_AREA_MSR))
+ ds_switch_to(prev_p, next_p);
+ else if (next->debugctlmsr != prev->debugctlmsr)
+ update_debugctlmsr(next->debugctlmsr);
+
if (test_tsk_thread_flag(next_p, TIF_DEBUG)) {
- set_debugreg(next->debugreg[0], 0);
- set_debugreg(next->debugreg[1], 1);
- set_debugreg(next->debugreg[2], 2);
- set_debugreg(next->debugreg[3], 3);
+ set_debugreg(next->debugreg0, 0);
+ set_debugreg(next->debugreg1, 1);
+ set_debugreg(next->debugreg2, 2);
+ set_debugreg(next->debugreg3, 3);
/* no 4 and 5 */
- set_debugreg(next->debugreg[6], 6);
- set_debugreg(next->debugreg[7], 7);
+ set_debugreg(next->debugreg6, 6);
+ set_debugreg(next->debugreg7, 7);
}
-#ifdef CONFIG_SECCOMP
if (test_tsk_thread_flag(prev_p, TIF_NOTSC) ^
test_tsk_thread_flag(next_p, TIF_NOTSC)) {
/* prev and next are different */
else
hard_enable_TSC();
}
-#endif
if (!test_tsk_thread_flag(next_p, TIF_IO_BITMAP)) {
/*
* 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.
*/
-struct task_struct fastcall * __switch_to(struct task_struct *prev_p, struct task_struct *next_p)
+__notrace_funcgraph struct task_struct *
+__switch_to(struct task_struct *prev_p, struct task_struct *next_p)
{
struct thread_struct *prev = &prev_p->thread,
*next = &next_p->thread;
/* we're going to use this soon, after a few expensive things */
if (next_p->fpu_counter > 5)
- prefetch(&next->i387.fxsave);
+ prefetch(next->xstate);
/*
* Reload esp0.
*/
- load_esp0(tss, next);
+ load_sp0(tss, next);
/*
* Save away %gs. No need to save %fs, as it was saved on the
/* If the task has used fpu the last 5 timeslices, just do a full
* restore of the math state immediately to avoid the trap; the
* chances of needing FPU soon are obviously high now
+ *
+ * tsk_used_math() checks prevent calling math_state_restore(),
+ * which can sleep in the case of !tsk_used_math()
*/
- if (next_p->fpu_counter > 5)
+ if (tsk_used_math(next_p) && next_p->fpu_counter > 5)
math_state_restore();
/*
if (prev->gs | next->gs)
loadsegment(gs, next->gs);
- x86_write_percpu(current_task, next_p);
+ percpu_write(current_task, next_p);
return prev_p;
}
asmlinkage int sys_fork(struct pt_regs regs)
{
- return do_fork(SIGCHLD, regs.esp, ®s, 0, NULL, NULL);
+ return do_fork(SIGCHLD, regs.sp, ®s, 0, NULL, NULL);
}
asmlinkage int sys_clone(struct pt_regs regs)
unsigned long newsp;
int __user *parent_tidptr, *child_tidptr;
- clone_flags = regs.ebx;
- newsp = regs.ecx;
- parent_tidptr = (int __user *)regs.edx;
- child_tidptr = (int __user *)regs.edi;
+ clone_flags = regs.bx;
+ newsp = regs.cx;
+ parent_tidptr = (int __user *)regs.dx;
+ child_tidptr = (int __user *)regs.di;
if (!newsp)
- newsp = regs.esp;
+ newsp = regs.sp;
return do_fork(clone_flags, newsp, ®s, 0, parent_tidptr, child_tidptr);
}
*/
asmlinkage int sys_vfork(struct pt_regs regs)
{
- return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs.esp, ®s, 0, NULL, NULL);
+ return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs.sp, ®s, 0, NULL, NULL);
}
/*
asmlinkage int sys_execve(struct pt_regs regs)
{
int error;
- char * filename;
+ 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.edx,
+ (char __user * __user *) regs.cx,
+ (char __user * __user *) regs.dx,
®s);
if (error == 0) {
- task_lock(current);
- current->ptrace &= ~PT_DTRACE;
- task_unlock(current);
/* Make sure we don't return using sysenter.. */
set_thread_flag(TIF_IRET);
}
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;
- if (!stack_page || esp < stack_page || esp > top_esp+stack_page)
+ sp = p->thread.sp;
+ if (!stack_page || sp < stack_page || sp > top_esp+stack_page)
return 0;
- /* include/asm-i386/system.h:switch_to() pushes ebp last. */
- ebp = *(unsigned long *) esp;
+ /* include/asm-i386/system.h:switch_to() pushes bp last. */
+ 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);
- if (!in_sched_functions(eip))
- return eip;
- ebp = *(unsigned long *) ebp;
+ ip = *(unsigned long *) (bp+4);
+ if (!in_sched_functions(ip))
+ return ip;
+ bp = *(unsigned long *) bp;
} while (count++ < 16);
return 0;
}
-/*
- * sys_alloc_thread_area: get a yet unused TLS descriptor index.
- */
-static int get_free_idx(void)
-{
- struct thread_struct *t = ¤t->thread;
- int idx;
-
- for (idx = 0; idx < GDT_ENTRY_TLS_ENTRIES; idx++)
- if (desc_empty(t->tls_array + idx))
- return idx + GDT_ENTRY_TLS_MIN;
- return -ESRCH;
-}
-
-/*
- * Set a given TLS descriptor:
- */
-asmlinkage int sys_set_thread_area(struct user_desc __user *u_info)
-{
- struct thread_struct *t = ¤t->thread;
- struct user_desc info;
- struct desc_struct *desc;
- int cpu, idx;
-
- if (copy_from_user(&info, u_info, sizeof(info)))
- return -EFAULT;
- idx = info.entry_number;
-
- /*
- * index -1 means the kernel should try to find and
- * allocate an empty descriptor:
- */
- if (idx == -1) {
- idx = get_free_idx();
- if (idx < 0)
- return idx;
- if (put_user(idx, &u_info->entry_number))
- return -EFAULT;
- }
-
- if (idx < GDT_ENTRY_TLS_MIN || idx > GDT_ENTRY_TLS_MAX)
- return -EINVAL;
-
- desc = t->tls_array + idx - GDT_ENTRY_TLS_MIN;
-
- /*
- * We must not get preempted while modifying the TLS.
- */
- cpu = get_cpu();
-
- if (LDT_empty(&info)) {
- desc->a = 0;
- desc->b = 0;
- } else {
- desc->a = LDT_entry_a(&info);
- desc->b = LDT_entry_b(&info);
- }
- load_TLS(t, cpu);
-
- put_cpu();
-
- return 0;
-}
-
-/*
- * Get the current Thread-Local Storage area:
- */
-
-#define GET_BASE(desc) ( \
- (((desc)->a >> 16) & 0x0000ffff) | \
- (((desc)->b << 16) & 0x00ff0000) | \
- ( (desc)->b & 0xff000000) )
-
-#define GET_LIMIT(desc) ( \
- ((desc)->a & 0x0ffff) | \
- ((desc)->b & 0xf0000) )
-
-#define GET_32BIT(desc) (((desc)->b >> 22) & 1)
-#define GET_CONTENTS(desc) (((desc)->b >> 10) & 3)
-#define GET_WRITABLE(desc) (((desc)->b >> 9) & 1)
-#define GET_LIMIT_PAGES(desc) (((desc)->b >> 23) & 1)
-#define GET_PRESENT(desc) (((desc)->b >> 15) & 1)
-#define GET_USEABLE(desc) (((desc)->b >> 20) & 1)
-
-asmlinkage int sys_get_thread_area(struct user_desc __user *u_info)
-{
- struct user_desc info;
- struct desc_struct *desc;
- int idx;
-
- if (get_user(idx, &u_info->entry_number))
- return -EFAULT;
- if (idx < GDT_ENTRY_TLS_MIN || idx > GDT_ENTRY_TLS_MAX)
- return -EINVAL;
-
- memset(&info, 0, sizeof(info));
-
- desc = current->thread.tls_array + idx - GDT_ENTRY_TLS_MIN;
-
- info.entry_number = idx;
- info.base_addr = GET_BASE(desc);
- info.limit = GET_LIMIT(desc);
- info.seg_32bit = GET_32BIT(desc);
- info.contents = GET_CONTENTS(desc);
- info.read_exec_only = !GET_WRITABLE(desc);
- info.limit_in_pages = GET_LIMIT_PAGES(desc);
- info.seg_not_present = !GET_PRESENT(desc);
- info.useable = GET_USEABLE(desc);
-
- if (copy_to_user(u_info, &info, sizeof(info)))
- return -EFAULT;
- return 0;
-}
-
unsigned long arch_align_stack(unsigned long sp)
{
if (!(current->personality & ADDR_NO_RANDOMIZE) && randomize_va_space)
sp -= get_random_int() % 8192;
return sp & ~0xf;
}
+
+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;
+}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff