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Diffstat (limited to 'arch/mips/kernel/kprobes.c')
-rw-r--r--arch/mips/kernel/kprobes.c64
1 files changed, 37 insertions, 27 deletions
diff --git a/arch/mips/kernel/kprobes.c b/arch/mips/kernel/kprobes.c
index 75bff0f77319..dc39f5b3fb83 100644
--- a/arch/mips/kernel/kprobes.c
+++ b/arch/mips/kernel/kprobes.c
@@ -11,6 +11,8 @@
* Copyright (C) IBM Corporation, 2002, 2004
*/
+#define pr_fmt(fmt) "kprobes: " fmt
+
#include <linux/kprobes.h>
#include <linux/preempt.h>
#include <linux/uaccess.h>
@@ -42,19 +44,20 @@ static const union mips_instruction breakpoint2_insn = {
DEFINE_PER_CPU(struct kprobe *, current_kprobe);
DEFINE_PER_CPU(struct kprobe_ctlblk, kprobe_ctlblk);
-static int __kprobes insn_has_delayslot(union mips_instruction insn)
+static int insn_has_delayslot(union mips_instruction insn)
{
return __insn_has_delay_slot(insn);
}
+NOKPROBE_SYMBOL(insn_has_delayslot);
/*
* insn_has_ll_or_sc function checks whether instruction is ll or sc
* one; putting breakpoint on top of atomic ll/sc pair is bad idea;
* so we need to prevent it and refuse kprobes insertion for such
* instructions; cannot do much about breakpoint in the middle of
- * ll/sc pair; it is upto user to avoid those places
+ * ll/sc pair; it is up to user to avoid those places
*/
-static int __kprobes insn_has_ll_or_sc(union mips_instruction insn)
+static int insn_has_ll_or_sc(union mips_instruction insn)
{
int ret = 0;
@@ -70,8 +73,9 @@ static int __kprobes insn_has_ll_or_sc(union mips_instruction insn)
}
return ret;
}
+NOKPROBE_SYMBOL(insn_has_ll_or_sc);
-int __kprobes arch_prepare_kprobe(struct kprobe *p)
+int arch_prepare_kprobe(struct kprobe *p)
{
union mips_instruction insn;
union mips_instruction prev_insn;
@@ -80,8 +84,7 @@ int __kprobes arch_prepare_kprobe(struct kprobe *p)
insn = p->addr[0];
if (insn_has_ll_or_sc(insn)) {
- pr_notice("Kprobes for ll and sc instructions are not"
- "supported\n");
+ pr_notice("Kprobes for ll and sc instructions are not supported\n");
ret = -EINVAL;
goto out;
}
@@ -131,26 +134,30 @@ int __kprobes arch_prepare_kprobe(struct kprobe *p)
out:
return ret;
}
+NOKPROBE_SYMBOL(arch_prepare_kprobe);
-void __kprobes arch_arm_kprobe(struct kprobe *p)
+void arch_arm_kprobe(struct kprobe *p)
{
*p->addr = breakpoint_insn;
flush_insn_slot(p);
}
+NOKPROBE_SYMBOL(arch_arm_kprobe);
-void __kprobes arch_disarm_kprobe(struct kprobe *p)
+void arch_disarm_kprobe(struct kprobe *p)
{
*p->addr = p->opcode;
flush_insn_slot(p);
}
+NOKPROBE_SYMBOL(arch_disarm_kprobe);
-void __kprobes arch_remove_kprobe(struct kprobe *p)
+void arch_remove_kprobe(struct kprobe *p)
{
if (p->ainsn.insn) {
free_insn_slot(p->ainsn.insn, 0);
p->ainsn.insn = NULL;
}
}
+NOKPROBE_SYMBOL(arch_remove_kprobe);
static void save_previous_kprobe(struct kprobe_ctlblk *kcb)
{
@@ -219,7 +226,7 @@ static int evaluate_branch_instruction(struct kprobe *p, struct pt_regs *regs,
return 0;
unaligned:
- pr_notice("%s: unaligned epc - sending SIGBUS.\n", current->comm);
+ pr_notice("Failed to emulate branch instruction because of unaligned epc - sending SIGBUS to %s.\n", current->comm);
force_sig(SIGBUS);
return -EFAULT;
@@ -238,10 +245,8 @@ static void prepare_singlestep(struct kprobe *p, struct pt_regs *regs,
regs->cp0_epc = (unsigned long)p->addr;
else if (insn_has_delayslot(p->opcode)) {
ret = evaluate_branch_instruction(p, regs, kcb);
- if (ret < 0) {
- pr_notice("Kprobes: Error in evaluating branch\n");
+ if (ret < 0)
return;
- }
}
regs->cp0_epc = (unsigned long)&p->ainsn.insn[0];
}
@@ -258,7 +263,7 @@ static void prepare_singlestep(struct kprobe *p, struct pt_regs *regs,
* breakpoint trap. In case of branch instructions, the target
* epc to be restored.
*/
-static void __kprobes resume_execution(struct kprobe *p,
+static void resume_execution(struct kprobe *p,
struct pt_regs *regs,
struct kprobe_ctlblk *kcb)
{
@@ -269,8 +274,9 @@ static void __kprobes resume_execution(struct kprobe *p,
regs->cp0_epc = orig_epc + 4;
}
}
+NOKPROBE_SYMBOL(resume_execution);
-static int __kprobes kprobe_handler(struct pt_regs *regs)
+static int kprobe_handler(struct pt_regs *regs)
{
struct kprobe *p;
int ret = 0;
@@ -368,6 +374,7 @@ no_kprobe:
return ret;
}
+NOKPROBE_SYMBOL(kprobe_handler);
static inline int post_kprobe_handler(struct pt_regs *regs)
{
@@ -416,7 +423,7 @@ int kprobe_fault_handler(struct pt_regs *regs, int trapnr)
/*
* Wrapper routine for handling exceptions.
*/
-int __kprobes kprobe_exceptions_notify(struct notifier_block *self,
+int kprobe_exceptions_notify(struct notifier_block *self,
unsigned long val, void *data)
{
@@ -447,6 +454,7 @@ int __kprobes kprobe_exceptions_notify(struct notifier_block *self,
}
return ret;
}
+NOKPROBE_SYMBOL(kprobe_exceptions_notify);
/*
* Function return probe trampoline:
@@ -461,33 +469,33 @@ static void __used kretprobe_trampoline_holder(void)
/* Keep the assembler from reordering and placing JR here. */
".set noreorder\n\t"
"nop\n\t"
- ".global kretprobe_trampoline\n"
- "kretprobe_trampoline:\n\t"
+ ".global __kretprobe_trampoline\n"
+ "__kretprobe_trampoline:\n\t"
"nop\n\t"
".set pop"
: : : "memory");
}
-void kretprobe_trampoline(void);
+void __kretprobe_trampoline(void);
-void __kprobes arch_prepare_kretprobe(struct kretprobe_instance *ri,
+void arch_prepare_kretprobe(struct kretprobe_instance *ri,
struct pt_regs *regs)
{
ri->ret_addr = (kprobe_opcode_t *) regs->regs[31];
ri->fp = NULL;
/* Replace the return addr with trampoline addr */
- regs->regs[31] = (unsigned long)kretprobe_trampoline;
+ regs->regs[31] = (unsigned long)__kretprobe_trampoline;
}
+NOKPROBE_SYMBOL(arch_prepare_kretprobe);
/*
* Called when the probe at kretprobe trampoline is hit
*/
-static int __kprobes trampoline_probe_handler(struct kprobe *p,
+static int trampoline_probe_handler(struct kprobe *p,
struct pt_regs *regs)
{
- instruction_pointer(regs) = __kretprobe_trampoline_handler(regs,
- kretprobe_trampoline, NULL);
+ instruction_pointer(regs) = __kretprobe_trampoline_handler(regs, NULL);
/*
* By returning a non-zero value, we are telling
* kprobe_handler() that we don't want the post_handler
@@ -495,17 +503,19 @@ static int __kprobes trampoline_probe_handler(struct kprobe *p,
*/
return 1;
}
+NOKPROBE_SYMBOL(trampoline_probe_handler);
-int __kprobes arch_trampoline_kprobe(struct kprobe *p)
+int arch_trampoline_kprobe(struct kprobe *p)
{
- if (p->addr == (kprobe_opcode_t *)kretprobe_trampoline)
+ if (p->addr == (kprobe_opcode_t *)__kretprobe_trampoline)
return 1;
return 0;
}
+NOKPROBE_SYMBOL(arch_trampoline_kprobe);
static struct kprobe trampoline_p = {
- .addr = (kprobe_opcode_t *)kretprobe_trampoline,
+ .addr = (kprobe_opcode_t *)__kretprobe_trampoline,
.pre_handler = trampoline_probe_handler
};
generated by cgit (git 2.34.1) at 2025-12-24 20:00:46 +0000