.insn_size = MAX_INSN_SIZE,
};
-static int __kprobes is_prohibited_opcode(kprobe_opcode_t *insn)
-{
- if (!is_known_insn((unsigned char *)insn))
- return -EINVAL;
- switch (insn[0] >> 8) {
- case 0x0c: /* bassm */
- case 0x0b: /* bsm */
- case 0x83: /* diag */
- case 0x44: /* ex */
- case 0xac: /* stnsm */
- case 0xad: /* stosm */
- return -EINVAL;
- case 0xc6:
- switch (insn[0] & 0x0f) {
- case 0x00: /* exrl */
- return -EINVAL;
- }
- }
- switch (insn[0]) {
- case 0x0101: /* pr */
- case 0xb25a: /* bsa */
- case 0xb240: /* bakr */
- case 0xb258: /* bsg */
- case 0xb218: /* pc */
- case 0xb228: /* pt */
- case 0xb98d: /* epsw */
- return -EINVAL;
- }
- return 0;
-}
-
-static int __kprobes get_fixup_type(kprobe_opcode_t *insn)
-{
- /* default fixup method */
- int fixup = FIXUP_PSW_NORMAL;
-
- switch (insn[0] >> 8) {
- case 0x05: /* balr */
- case 0x0d: /* basr */
- fixup = FIXUP_RETURN_REGISTER;
- /* if r2 = 0, no branch will be taken */
- if ((insn[0] & 0x0f) == 0)
- fixup |= FIXUP_BRANCH_NOT_TAKEN;
- break;
- case 0x06: /* bctr */
- case 0x07: /* bcr */
- fixup = FIXUP_BRANCH_NOT_TAKEN;
- break;
- case 0x45: /* bal */
- case 0x4d: /* bas */
- fixup = FIXUP_RETURN_REGISTER;
- break;
- case 0x47: /* bc */
- case 0x46: /* bct */
- case 0x86: /* bxh */
- case 0x87: /* bxle */
- fixup = FIXUP_BRANCH_NOT_TAKEN;
- break;
- case 0x82: /* lpsw */
- fixup = FIXUP_NOT_REQUIRED;
- break;
- case 0xb2: /* lpswe */
- if ((insn[0] & 0xff) == 0xb2)
- fixup = FIXUP_NOT_REQUIRED;
- break;
- case 0xa7: /* bras */
- if ((insn[0] & 0x0f) == 0x05)
- fixup |= FIXUP_RETURN_REGISTER;
- break;
- case 0xc0:
- if ((insn[0] & 0x0f) == 0x05) /* brasl */
- fixup |= FIXUP_RETURN_REGISTER;
- break;
- case 0xeb:
- switch (insn[2] & 0xff) {
- case 0x44: /* bxhg */
- case 0x45: /* bxleg */
- fixup = FIXUP_BRANCH_NOT_TAKEN;
- break;
- }
- break;
- case 0xe3: /* bctg */
- if ((insn[2] & 0xff) == 0x46)
- fixup = FIXUP_BRANCH_NOT_TAKEN;
- break;
- case 0xec:
- switch (insn[2] & 0xff) {
- case 0xe5: /* clgrb */
- case 0xe6: /* cgrb */
- case 0xf6: /* crb */
- case 0xf7: /* clrb */
- case 0xfc: /* cgib */
- case 0xfd: /* cglib */
- case 0xfe: /* cib */
- case 0xff: /* clib */
- fixup = FIXUP_BRANCH_NOT_TAKEN;
- break;
- }
- break;
- }
- return fixup;
-}
-
-static int __kprobes is_insn_relative_long(kprobe_opcode_t *insn)
-{
- /* Check if we have a RIL-b or RIL-c format instruction which
- * we need to modify in order to avoid instruction emulation. */
- switch (insn[0] >> 8) {
- case 0xc0:
- if ((insn[0] & 0x0f) == 0x00) /* larl */
- return true;
- break;
- case 0xc4:
- switch (insn[0] & 0x0f) {
- case 0x02: /* llhrl */
- case 0x04: /* lghrl */
- case 0x05: /* lhrl */
- case 0x06: /* llghrl */
- case 0x07: /* sthrl */
- case 0x08: /* lgrl */
- case 0x0b: /* stgrl */
- case 0x0c: /* lgfrl */
- case 0x0d: /* lrl */
- case 0x0e: /* llgfrl */
- case 0x0f: /* strl */
- return true;
- }
- break;
- case 0xc6:
- switch (insn[0] & 0x0f) {
- case 0x02: /* pfdrl */
- case 0x04: /* cghrl */
- case 0x05: /* chrl */
- case 0x06: /* clghrl */
- case 0x07: /* clhrl */
- case 0x08: /* cgrl */
- case 0x0a: /* clgrl */
- case 0x0c: /* cgfrl */
- case 0x0d: /* crl */
- case 0x0e: /* clgfrl */
- case 0x0f: /* clrl */
- return true;
- }
- break;
- }
- return false;
-}
-
static void __kprobes copy_instruction(struct kprobe *p)
{
s64 disp, new_disp;
u64 addr, new_addr;
memcpy(p->ainsn.insn, p->addr, insn_length(p->opcode >> 8));
- if (!is_insn_relative_long(p->ainsn.insn))
+ if (!probe_is_insn_relative_long(p->ainsn.insn))
return;
/*
* For pc-relative instructions in RIL-b or RIL-c format patch the
if ((unsigned long) p->addr & 0x01)
return -EINVAL;
/* Make sure the probe isn't going on a difficult instruction */
- if (is_prohibited_opcode(p->addr))
+ if (probe_is_prohibited_opcode(p->addr))
return -EINVAL;
if (s390_get_insn_slot(p))
return -ENOMEM;
*/
static void __kprobes push_kprobe(struct kprobe_ctlblk *kcb, struct kprobe *p)
{
- kcb->prev_kprobe.kp = __get_cpu_var(current_kprobe);
+ kcb->prev_kprobe.kp = __this_cpu_read(current_kprobe);
kcb->prev_kprobe.status = kcb->kprobe_status;
- __get_cpu_var(current_kprobe) = p;
+ __this_cpu_write(current_kprobe, p);
}
/*
*/
static void __kprobes pop_kprobe(struct kprobe_ctlblk *kcb)
{
- __get_cpu_var(current_kprobe) = kcb->prev_kprobe.kp;
+ __this_cpu_write(current_kprobe, kcb->prev_kprobe.kp);
kcb->kprobe_status = kcb->prev_kprobe.status;
}
enable_singlestep(kcb, regs, (unsigned long) p->ainsn.insn);
return 1;
} else if (kprobe_running()) {
- p = __get_cpu_var(current_kprobe);
+ p = __this_cpu_read(current_kprobe);
if (p->break_handler && p->break_handler(p, regs)) {
/*
* Continuation after the jprobe completed and
{
struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
unsigned long ip = regs->psw.addr & PSW_ADDR_INSN;
- int fixup = get_fixup_type(p->ainsn.insn);
+ int fixup = probe_get_fixup_type(p->ainsn.insn);
if (fixup & FIXUP_PSW_NORMAL)
ip += (unsigned long) p->addr - (unsigned long) p->ainsn.insn;
asm volatile(".word 0x0002");
}
-static void __used __kprobes jprobe_return_end(void)
-{
- asm volatile("bcr 0,0");
-}
-
int __kprobes longjmp_break_handler(struct kprobe *p, struct pt_regs *regs)
{
struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
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