C++ (Cpp) VDSO_SYMBOL Examples

Example #1

File: init-first.c Project: chenzhongtao/glibc

static inline void
_libc_vdso_platform_setup (void)
{
  PREPARE_VERSION_KNOWN (linux26, LINUX_2_6);

  void *p = _dl_vdso_vsym ("__vdso_gettimeofday", &linux26);
  PTR_MANGLE (p);
  VDSO_SYMBOL (gettimeofday) = p;

  p = _dl_vdso_vsym ("__vdso_clock_gettime", &linux26);
  PTR_MANGLE (p);
  VDSO_SYMBOL (clock_gettime) = p;
}

Example #2

File: init-first.c Project: KubaKaszycki/kklibc

static inline void
_libc_vdso_platform_setup (void)
{
  PREPARE_VERSION (linux2639, "LINUX_2.6.39", 123718537);

  void *p = _dl_vdso_vsym ("__kernel_gettimeofday", &linux2639);
  PTR_MANGLE (p);
  VDSO_SYMBOL(gettimeofday) = p;

  p = _dl_vdso_vsym ("__kernel_clock_gettime", &linux2639);
  PTR_MANGLE (p);
  VDSO_SYMBOL(clock_gettime) = p;

  p = _dl_vdso_vsym ("__kernel_clock_getres", &linux2639);
  PTR_MANGLE (p);
  VDSO_SYMBOL(clock_getres) = p;
}

Example #3

File: signal_template.c Project: garyvan/openwrt-1.6

static void setup_return(struct pt_regs *regs, struct k_sigaction *ka,
			 void __user *frame, int usig)
{
	__sigrestore_t sigtramp;

	regs->regs[0] = usig;
	regs->sp = (unsigned long)frame;
	regs->regs[29] = regs->sp + offsetof(struct rt_sigframe, fp);
	regs->pc = (unsigned long)ka->sa.sa_handler;

	if (ka->sa.sa_flags & SA_RESTORER)
		sigtramp = ka->sa.sa_restorer;
#ifdef CONFIG_ARM64_ILP32
	else if (is_ilp32_compat_task())
		sigtramp = VDSO_SYMBOL(current->mm->context.vdso, sigtramp_ilp32);
#endif
        else
		sigtramp = VDSO_SYMBOL(current->mm->context.vdso, sigtramp);

	regs->regs[30] = (unsigned long)sigtramp;
}

Example #4

File: init-first.c Project: kraj/glibc

static inline void
_libc_vdso_platform_setup (void)
{
#ifdef __LP64__
  PREPARE_VERSION (linux_version, "LINUX_2.6.39", 123718537);
#else
  PREPARE_VERSION (linux_version, "LINUX_4.9", 61765625);
#endif

  void *p = _dl_vdso_vsym ("__kernel_gettimeofday", &linux_version);
  PTR_MANGLE (p);
  VDSO_SYMBOL(gettimeofday) = p;

  p = _dl_vdso_vsym ("__kernel_clock_gettime", &linux_version);
  PTR_MANGLE (p);
  VDSO_SYMBOL(clock_gettime) = p;

  p = _dl_vdso_vsym ("__kernel_clock_getres", &linux_version);
  PTR_MANGLE (p);
  VDSO_SYMBOL(clock_getres) = p;
}

Example #5

File: signal.c Project: 150balbes/Amlogic_s905-kernel

static int
setup_return(struct pt_regs *regs, struct ksignal *ksig, void __user * frame)
{
	unsigned long handler = (unsigned long)ksig->ka.sa.sa_handler;
	unsigned long retcode;

	retcode = VDSO_SYMBOL(current->mm->context.vdso, rt_sigtramp);
	regs->uregs[0] = ksig->sig;
	regs->sp = (unsigned long)frame;
	regs->lp = retcode;
	regs->ipc = handler;

	return 0;
}

Example #6

File: signal.c Project: Eyeless95/samsung_g531h_kernel

static void setup_return(struct pt_regs *regs, struct k_sigaction *ka,
			 void __user *frame, int usig)
{
	__sigrestore_t sigtramp;

	regs->regs[0] = usig;
	regs->sp = (unsigned long)frame;
	regs->regs[29] = regs->sp + offsetof(struct rt_sigframe, fp);
	regs->pc = (unsigned long)ka->sa.sa_handler;

	if (ka->sa.sa_flags & SA_RESTORER)
		sigtramp = ka->sa.sa_restorer;
	else
		sigtramp = VDSO_SYMBOL(current->mm->context.vdso, sigtramp);

	regs->regs[30] = (unsigned long)sigtramp;
}

Example #7

File: signal.c Project: congwang/linux

static int setup_rt_frame(struct ksignal *ksig, sigset_t *set,
	struct pt_regs *regs)
{
	struct rt_sigframe __user *frame;
	long err = 0;

	frame = get_sigframe(ksig, regs, sizeof(*frame));
	if (!access_ok(frame, sizeof(*frame)))
		return -EFAULT;

	err |= copy_siginfo_to_user(&frame->info, &ksig->info);

	/* Create the ucontext. */
	err |= __put_user(0, &frame->uc.uc_flags);
	err |= __put_user(NULL, &frame->uc.uc_link);
	err |= __save_altstack(&frame->uc.uc_stack, regs->sp);
	err |= setup_sigcontext(frame, regs);
	err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
	if (err)
		return -EFAULT;

	/* Set up to return from userspace. */
	regs->ra = (unsigned long)VDSO_SYMBOL(
		current->mm->context.vdso, rt_sigreturn);

	/*
	 * Set up registers for signal handler.
	 * Registers that we don't modify keep the value they had from
	 * user-space at the time we took the signal.
	 * We always pass siginfo and mcontext, regardless of SA_SIGINFO,
	 * since some things rely on this (e.g. glibc's debug/segfault.c).
	 */
	regs->sepc = (unsigned long)ksig->ka.sa.sa_handler;
	regs->sp = (unsigned long)frame;
	regs->a0 = ksig->sig;                     /* a0: signal number */
	regs->a1 = (unsigned long)(&frame->info); /* a1: siginfo pointer */
	regs->a2 = (unsigned long)(&frame->uc);   /* a2: ucontext pointer */

#if DEBUG_SIG
	pr_info("SIG deliver (%s:%d): sig=%d pc=%p ra=%p sp=%p\n",
		current->comm, task_pid_nr(current), ksig->sig,
		(void *)regs->sepc, (void *)regs->ra, frame);
#endif

	return 0;
}