Because slot 1 of one instr bundle crosses border of two consecutive
8-bytes, kprobe on slot 1 is disabled. This patch enables kprobe on
slot1, it only replaces higher 8-bytes of the instruction bundle and
changes the exception code to ignore the low 12 bits of the break
number (which is across the border in the lower 8-bytes of the bundle).
For those instructions which must execute regardless qp bits,
kprobe on slot 1 is still disabled.
Signed-off-by: bibo,mao <bibo.mao@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
* to the correct location.
*/
#include <asm/asmmacro.h>
* to the correct location.
*/
#include <asm/asmmacro.h>
+#include <asm-ia64/break.h>
/*
* void jprobe_break(void)
*/
.section .kprobes.text, "ax"
ENTRY(jprobe_break)
/*
* void jprobe_break(void)
*/
.section .kprobes.text, "ax"
ENTRY(jprobe_break)
+ break.m __IA64_BREAK_JPROBE
{
p->ainsn.inst_flag = 0;
p->ainsn.target_br_reg = 0;
{
p->ainsn.inst_flag = 0;
p->ainsn.target_br_reg = 0;
/* Check for Break instruction
* Bits 37:40 Major opcode to be zero
/* Check for Break instruction
* Bits 37:40 Major opcode to be zero
- if (slot == 1 && bundle_encoding[template][1] != L) {
- printk(KERN_WARNING "Inserting kprobes on slot #1 "
- "is not supported\n");
- return -EINVAL;
- }
-
void __kprobes arch_arm_kprobe(struct kprobe *p)
{
void __kprobes arch_arm_kprobe(struct kprobe *p)
{
- unsigned long addr = (unsigned long)p->addr;
- unsigned long arm_addr = addr & ~0xFULL;
+ unsigned long arm_addr;
+ bundle_t *src, *dest;
+
+ arm_addr = ((unsigned long)p->addr) & ~0xFUL;
+ dest = &((kprobe_opcode_t *)arm_addr)->bundle;
+ src = &p->opcode.bundle;
flush_icache_range((unsigned long)p->ainsn.insn,
(unsigned long)p->ainsn.insn + sizeof(kprobe_opcode_t));
flush_icache_range((unsigned long)p->ainsn.insn,
(unsigned long)p->ainsn.insn + sizeof(kprobe_opcode_t));
- memcpy((char *)arm_addr, &p->opcode, sizeof(kprobe_opcode_t));
+ switch (p->ainsn.slot) {
+ case 0:
+ dest->quad0.slot0 = src->quad0.slot0;
+ break;
+ case 1:
+ dest->quad1.slot1_p1 = src->quad1.slot1_p1;
+ break;
+ case 2:
+ dest->quad1.slot2 = src->quad1.slot2;
+ break;
+ }
flush_icache_range(arm_addr, arm_addr + sizeof(kprobe_opcode_t));
}
void __kprobes arch_disarm_kprobe(struct kprobe *p)
{
flush_icache_range(arm_addr, arm_addr + sizeof(kprobe_opcode_t));
}
void __kprobes arch_disarm_kprobe(struct kprobe *p)
{
- unsigned long addr = (unsigned long)p->addr;
- unsigned long arm_addr = addr & ~0xFULL;
+ unsigned long arm_addr;
+ bundle_t *src, *dest;
+ arm_addr = ((unsigned long)p->addr) & ~0xFUL;
+ dest = &((kprobe_opcode_t *)arm_addr)->bundle;
/* p->ainsn.insn contains the original unaltered kprobe_opcode_t */
/* p->ainsn.insn contains the original unaltered kprobe_opcode_t */
- memcpy((char *) arm_addr, (char *) p->ainsn.insn,
- sizeof(kprobe_opcode_t));
+ src = &p->ainsn.insn->bundle;
+ switch (p->ainsn.slot) {
+ case 0:
+ dest->quad0.slot0 = src->quad0.slot0;
+ break;
+ case 1:
+ dest->quad1.slot1_p1 = src->quad1.slot1_p1;
+ break;
+ case 2:
+ dest->quad1.slot2 = src->quad1.slot2;
+ break;
+ }
flush_icache_range(arm_addr, arm_addr + sizeof(kprobe_opcode_t));
}
flush_icache_range(arm_addr, arm_addr + sizeof(kprobe_opcode_t));
}
switch(val) {
case DIE_BREAK:
/* err is break number from ia64_bad_break() */
switch(val) {
case DIE_BREAK:
/* err is break number from ia64_bad_break() */
- if (args->err == 0x80200 || args->err == 0x80300 || args->err == 0)
+ if ((args->err >> 12) == (__IA64_BREAK_KPROBE >> 12)
+ || args->err == __IA64_BREAK_JPROBE
+ || args->err == 0)
if (pre_kprobes_handler(args))
ret = NOTIFY_STOP;
break;
if (pre_kprobes_handler(args))
ret = NOTIFY_STOP;
break;
* OS-specific debug break numbers:
*/
#define __IA64_BREAK_KDB 0x80100
* OS-specific debug break numbers:
*/
#define __IA64_BREAK_KDB 0x80100
-#define __IA64_BREAK_KPROBE 0x80200
-#define __IA64_BREAK_JPROBE 0x80300
+#define __IA64_BREAK_KPROBE 0x81000 /* .. 0x81fff */
+#define __IA64_BREAK_JPROBE 0x82000
/*
* OS-specific break numbers:
/*
* OS-specific break numbers:
#define INST_FLAG_BREAK_INST 4
unsigned long inst_flag;
unsigned short target_br_reg;
#define INST_FLAG_BREAK_INST 4
unsigned long inst_flag;
unsigned short target_br_reg;
};
extern int kprobe_exceptions_notify(struct notifier_block *self,
};
extern int kprobe_exceptions_notify(struct notifier_block *self,