void __kprobes arch_remove_kprobe(struct kprobe *p)
{
if (saved_next_opcode.addr != 0x0) {
arch_disarm_kprobe(p);
arch_disarm_kprobe(&saved_next_opcode);
saved_next_opcode.addr = 0x0;
saved_next_opcode.opcode = 0x0;
if (saved_next_opcode2.addr != 0x0) {
arch_disarm_kprobe(&saved_next_opcode2);
saved_next_opcode2.addr = 0x0;
saved_next_opcode2.opcode = 0x0;
}
}
}
void __kprobes arch_remove_kprobe(struct kprobe *p)
{
struct kprobe *saved = &__get_cpu_var(saved_next_opcode);
if (saved->addr) {
arch_disarm_kprobe(p);
arch_disarm_kprobe(saved);
saved->addr = NULL;
saved->opcode = 0;
saved = &__get_cpu_var(saved_next_opcode2);
if (saved->addr) {
arch_disarm_kprobe(saved);
saved->addr = NULL;
saved->opcode = 0;
}
}
}
/*
* Singlestep is implemented by disabling the current kprobe and setting one
* on the next instruction, following branches. Two probes are set if the
* branch is conditional.
*/
static void __kprobes prepare_singlestep(struct kprobe *p, struct pt_regs *regs)
{
kprobe_opcode_t *addr = NULL;
saved_current_opcode.addr = (kprobe_opcode_t *) (regs->pc);
addr = saved_current_opcode.addr;
if (p != NULL) {
arch_disarm_kprobe(p);
if (OPCODE_JSR(p->opcode) || OPCODE_JMP(p->opcode)) {
unsigned int reg_nr = ((p->opcode >> 8) & 0x000F);
saved_next_opcode.addr =
(kprobe_opcode_t *) regs->regs[reg_nr];
} else if (OPCODE_BRA(p->opcode) || OPCODE_BSR(p->opcode)) {
static void __kprobes prepare_singlestep(struct kprobe *p, struct pt_regs *regs)
{
__get_cpu_var(saved_current_opcode).addr = (kprobe_opcode_t *)regs->pc;
if (p != NULL) {
struct kprobe *op1, *op2;
arch_disarm_kprobe(p);
op1 = &__get_cpu_var(saved_next_opcode);
op2 = &__get_cpu_var(saved_next_opcode2);
if (OPCODE_JSR(p->opcode) || OPCODE_JMP(p->opcode)) {
unsigned int reg_nr = ((p->opcode >> 8) & 0x000F);
op1->addr = (kprobe_opcode_t *) regs->regs[reg_nr];
} else if (OPCODE_BRA(p->opcode) || OPCODE_BSR(p->opcode)) {
