Please do the checking based on the .text.ivt section instead (and add
the necessary labels to vmlinux.S and asm-ia64/sections.h).
Thanks,
--david
>>>>> On Thu, 23 Jun 2005 17:28:33 -0700, Keshavamurthy Anil S <[email protected]> said:
Anil> Subject: Refuse kprobe insert on IVT code
Anil> Not safe to insert kprobes on IVT code.
Anil> This patch checks to see if the address on which Kprobes is
Anil> being inserted is in ivt code and if it is in ivt code then
Anil> refuse to register kprobe.
Anil> Signed-off-by: Anil S Keshavamurthy
Anil> <[email protected]>
Anil> ===============================================
Anil> arch/ia64/kernel/kprobes.c | 13 +++++++++++++ 1 files changed,
Anil> 13 insertions(+)
Anil> Index: linux-2.6.12-mm1/arch/ia64/kernel/kprobes.c
Anil> ===================================================================
Anil> --- linux-2.6.12-mm1.orig/arch/ia64/kernel/kprobes.c +++
Anil> linux-2.6.12-mm1/arch/ia64/kernel/kprobes.c @@ -263,6 +263,13
Anil> @@ static inline void get_kprobe_inst(bundl } }
Anil> +/* Returns non-zero if the PC is in the Interrupt Vector
Anil> Table */ +static inline int in_ivt_code(unsigned long pc) +{ +
Anil> extern char ia64_ivt[]; + return (pc >= (u_long)ia64_ivt && pc
Anil> < (u_long)ia64_ivt+32768); +} + static int
Anil> valid_kprobe_addr(int template, int slot, unsigned long addr)
Anil> { if ((slot > 2) || ((bundle_encoding[template][1] == L) &&
Anil> slot > 1)) { @@ -271,6 +278,12 @@ static int
Anil> valid_kprobe_addr(int templat return -EINVAL; }
Anil> + if (in_ivt_code(addr)) { + printk(KERN_WARNING "Kprobes
Anil> can't be inserted inside " + "IVT code at 0x%lx\n", addr); +
Anil> return -EINVAL; + } + if (slot == 1) { printk(KERN_WARNING
Anil> "Inserting kprobes on slot #1 " "is not supported\n"); - To
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