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-rw-r--r--arch/ia64/kernel/kprobes.c18
-rw-r--r--arch/ia64/kernel/vmlinux.lds.S7
-rw-r--r--include/asm-ia64/sections.h1
3 files changed, 23 insertions, 3 deletions
diff --git a/arch/ia64/kernel/kprobes.c b/arch/ia64/kernel/kprobes.c
index ec2ceade12b0..3aa3167edbec 100644
--- a/arch/ia64/kernel/kprobes.c
+++ b/arch/ia64/kernel/kprobes.c
@@ -34,6 +34,7 @@
#include <asm/pgtable.h>
#include <asm/kdebug.h>
+#include <asm/sections.h>
extern void jprobe_inst_return(void);
@@ -263,14 +264,27 @@ static inline void get_kprobe_inst(bundle_t *bundle, uint slot,
}
}
+/* Returns non-zero if the addr is in the Interrupt Vector Table */
+static inline int in_ivt_functions(unsigned long addr)
+{
+ return (addr >= (unsigned long)__start_ivt_text
+ && addr < (unsigned long)__end_ivt_text);
+}
+
static int valid_kprobe_addr(int template, int slot, unsigned long addr)
{
if ((slot > 2) || ((bundle_encoding[template][1] == L) && slot > 1)) {
- printk(KERN_WARNING "Attempting to insert unaligned kprobe at 0x%lx\n",
- addr);
+ printk(KERN_WARNING "Attempting to insert unaligned kprobe "
+ "at 0x%lx\n", addr);
return -EINVAL;
}
+ if (in_ivt_functions(addr)) {
+ printk(KERN_WARNING "Kprobes can't be inserted inside "
+ "IVT functions at 0x%lx\n", addr);
+ return -EINVAL;
+ }
+
if (slot == 1 && bundle_encoding[template][1] != L) {
printk(KERN_WARNING "Inserting kprobes on slot #1 "
"is not supported\n");
diff --git a/arch/ia64/kernel/vmlinux.lds.S b/arch/ia64/kernel/vmlinux.lds.S
index b9f0db4c1b04..a676e79e0681 100644
--- a/arch/ia64/kernel/vmlinux.lds.S
+++ b/arch/ia64/kernel/vmlinux.lds.S
@@ -8,6 +8,11 @@
#define LOAD_OFFSET (KERNEL_START - KERNEL_TR_PAGE_SIZE)
#include <asm-generic/vmlinux.lds.h>
+#define IVT_TEXT \
+ VMLINUX_SYMBOL(__start_ivt_text) = .; \
+ *(.text.ivt) \
+ VMLINUX_SYMBOL(__end_ivt_text) = .;
+
OUTPUT_FORMAT("elf64-ia64-little")
OUTPUT_ARCH(ia64)
ENTRY(phys_start)
@@ -39,7 +44,7 @@ SECTIONS
.text : AT(ADDR(.text) - LOAD_OFFSET)
{
- *(.text.ivt)
+ IVT_TEXT
*(.text)
SCHED_TEXT
LOCK_TEXT
diff --git a/include/asm-ia64/sections.h b/include/asm-ia64/sections.h
index 8e3dbde1b429..e9eb7f62d32b 100644
--- a/include/asm-ia64/sections.h
+++ b/include/asm-ia64/sections.h
@@ -17,6 +17,7 @@ extern char __start_gate_vtop_patchlist[], __end_gate_vtop_patchlist[];
extern char __start_gate_fsyscall_patchlist[], __end_gate_fsyscall_patchlist[];
extern char __start_gate_brl_fsys_bubble_down_patchlist[], __end_gate_brl_fsys_bubble_down_patchlist[];
extern char __start_unwind[], __end_unwind[];
+extern char __start_ivt_text[], __end_ivt_text[];
#endif /* _ASM_IA64_SECTIONS_H */