C++ (Cpp) get_insn_slot Examples

Example #1

File: kprobes.c Project: Core2idiot/Kernel-Samsung-3.0...-

int __kprobes arch_prepare_kprobe(struct kprobe *p)
{
	kprobe_opcode_t insn;
	kprobe_opcode_t tmp_insn[MAX_INSN_SIZE];
	unsigned long addr = (unsigned long)p->addr;
	int is;

	if (addr & 0x3 || in_exception_text(addr))
		return -EINVAL;

	insn = *p->addr;
	p->opcode = insn;
	p->ainsn.insn = tmp_insn;

	switch (arm_kprobe_decode_insn(insn, &p->ainsn)) {
	case INSN_REJECTED:	/* not supported */
		return -EINVAL;

	case INSN_GOOD:		/* instruction uses slot */
		p->ainsn.insn = get_insn_slot();
		if (!p->ainsn.insn)
			return -ENOMEM;
		for (is = 0; is < MAX_INSN_SIZE; ++is)
			p->ainsn.insn[is] = tmp_insn[is];
		flush_insns(p->ainsn.insn, MAX_INSN_SIZE);
		break;

	case INSN_GOOD_NO_SLOT:	/* instruction doesn't need insn slot */
		p->ainsn.insn = NULL;
		break;
	}

	return 0;
}

Example #2

File: kprobes.c Project: marcero/ab73kernel-Hannspad-2632

int __kprobes arch_prepare_kprobe(struct kprobe *p)
{
	/* insn: must be on special executable page on x86. */
	p->ainsn.insn = get_insn_slot();
	if (!p->ainsn.insn)
		return -ENOMEM;
	arch_copy_kprobe(p);
	return 0;
}

Example #3

File: kprobes.c Project: 1ee7/linux_l4t_tx1

int __kprobes arch_prepare_kprobe(struct kprobe *p)
{
	kprobe_opcode_t insn;
	kprobe_opcode_t tmp_insn[MAX_INSN_SIZE];
	unsigned long addr = (unsigned long)p->addr;
	bool thumb;
	kprobe_decode_insn_t *decode_insn;
	int is;

	if (in_exception_text(addr))
		return -EINVAL;

#ifdef CONFIG_THUMB2_KERNEL
	thumb = true;
	addr &= ~1; /* Bit 0 would normally be set to indicate Thumb code */
	insn = __mem_to_opcode_thumb16(((u16 *)addr)[0]);
	if (is_wide_instruction(insn)) {
		u16 inst2 = __mem_to_opcode_thumb16(((u16 *)addr)[1]);
		insn = __opcode_thumb32_compose(insn, inst2);
		decode_insn = thumb32_kprobe_decode_insn;
	} else
		decode_insn = thumb16_kprobe_decode_insn;
#else /* !CONFIG_THUMB2_KERNEL */
	thumb = false;
	if (addr & 0x3)
		return -EINVAL;
	insn = __mem_to_opcode_arm(*p->addr);
	decode_insn = arm_kprobe_decode_insn;
#endif

	p->opcode = insn;
	p->ainsn.insn = tmp_insn;

	switch ((*decode_insn)(insn, &p->ainsn)) {
	case INSN_REJECTED:	/* not supported */
		return -EINVAL;

	case INSN_GOOD:		/* instruction uses slot */
		p->ainsn.insn = get_insn_slot();
		if (!p->ainsn.insn)
			return -ENOMEM;
		for (is = 0; is < MAX_INSN_SIZE; ++is)
			p->ainsn.insn[is] = tmp_insn[is];
		flush_insns(p->ainsn.insn,
				sizeof(p->ainsn.insn[0]) * MAX_INSN_SIZE);
		p->ainsn.insn_fn = (kprobe_insn_fn_t *)
					((uintptr_t)p->ainsn.insn | thumb);
		break;

	case INSN_GOOD_NO_SLOT:	/* instruction doesn't need insn slot */
		p->ainsn.insn = NULL;
		break;
	}

	return 0;
}

Example #4

File: kprobes.c Project: AdrianHuang/uclinux-robutest

int __kprobes arch_prepare_kprobe(struct kprobe *p)
{
	if (!can_probe((unsigned long)p->addr))
		return -EILSEQ;
	/* insn: must be on special executable page on x86. */
	p->ainsn.insn = get_insn_slot();
	if (!p->ainsn.insn)
		return -ENOMEM;
	arch_copy_kprobe(p);
	return 0;
}

Example #5

File: kprobes.c Project: ut-osa/syncchar

int __kprobes arch_prepare_kprobe(struct kprobe *p)
{
	/* insn: must be on special executable page on i386. */
	p->ainsn.insn = get_insn_slot();
	if (!p->ainsn.insn)
		return -ENOMEM;

	memcpy(p->ainsn.insn, p->addr, MAX_INSN_SIZE * sizeof(kprobe_opcode_t));
	p->opcode = *p->addr;
	return 0;
}

Example #6

File: core.c Project: AdvEnc/linux

int arch_prepare_kprobe(struct kprobe *p)
{
	if (alternatives_text_reserved(p->addr, p->addr))
		return -EINVAL;

	if (!can_probe((unsigned long)p->addr))
		return -EILSEQ;
	/* insn: must be on special executable page on x86. */
	p->ainsn.insn = get_insn_slot();
	if (!p->ainsn.insn)
		return -ENOMEM;

	return arch_copy_kprobe(p);
}

Example #7

File: core.c Project: 0-T-0/ps4-linux

int __kprobes arch_prepare_kprobe(struct kprobe *p)
{
	kprobe_opcode_t insn;
	kprobe_opcode_t tmp_insn[MAX_INSN_SIZE];
	unsigned long addr = (unsigned long)p->addr;
	bool thumb;
	kprobe_decode_insn_t *decode_insn;
	const union decode_action *actions;
	int is;
	const struct decode_checker **checkers;

	if (in_exception_text(addr))
		return -EINVAL;

#ifdef CONFIG_THUMB2_KERNEL
	thumb = true;
	addr &= ~1; /* Bit 0 would normally be set to indicate Thumb code */
	insn = __mem_to_opcode_thumb16(((u16 *)addr)[0]);
	if (is_wide_instruction(insn)) {
		u16 inst2 = __mem_to_opcode_thumb16(((u16 *)addr)[1]);
		insn = __opcode_thumb32_compose(insn, inst2);
		decode_insn = thumb32_probes_decode_insn;
		actions = kprobes_t32_actions;
		checkers = kprobes_t32_checkers;
	} else {
		decode_insn = thumb16_probes_decode_insn;
		actions = kprobes_t16_actions;
		checkers = kprobes_t16_checkers;
	}
#else /* !CONFIG_THUMB2_KERNEL */
	thumb = false;
	if (addr & 0x3)
		return -EINVAL;
	insn = __mem_to_opcode_arm(*p->addr);
	decode_insn = arm_probes_decode_insn;
	actions = kprobes_arm_actions;
	checkers = kprobes_arm_checkers;
#endif

	p->opcode = insn;
	p->ainsn.insn = tmp_insn;

	switch ((*decode_insn)(insn, &p->ainsn, true, actions, checkers)) {
	case INSN_REJECTED:	/* not supported */
		return -EINVAL;

	case INSN_GOOD:		/* instruction uses slot */
		p->ainsn.insn = get_insn_slot();
		if (!p->ainsn.insn)
			return -ENOMEM;
		for (is = 0; is < MAX_INSN_SIZE; ++is)
			p->ainsn.insn[is] = tmp_insn[is];
		flush_insns(p->ainsn.insn,
				sizeof(p->ainsn.insn[0]) * MAX_INSN_SIZE);
		p->ainsn.insn_fn = (probes_insn_fn_t *)
					((uintptr_t)p->ainsn.insn | thumb);
		break;

	case INSN_GOOD_NO_SLOT:	/* instruction doesn't need insn slot */
		p->ainsn.insn = NULL;
		break;
	}

	/*
	 * Never instrument insn like 'str r0, [sp, +/-r1]'. Also, insn likes
	 * 'str r0, [sp, #-68]' should also be prohibited.
	 * See __und_svc.
	 */
	if ((p->ainsn.stack_space < 0) ||
			(p->ainsn.stack_space > MAX_STACK_SIZE))
		return -EINVAL;

	return 0;
}