diff options
| author |   Vineet Gupta <vgupta@synopsys.com> | 2013-01-22 17:03:59 +0530 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2013-02-15 23:16:05 +0530 |
| commit | 4d86dfbbda09b3c67bcaeb370f22a2cc7f39205b (patch) | |
| tree | 689785c7e0cc853f52b55ba10d0546313c2335a9 /arch/arc/kernel/traps.c | |
| parent | ARC: disassembly (needed by kprobes/kgdb/unaligned-access-emul) (diff) | |
| download | linux-dev-4d86dfbbda09b3c67bcaeb370f22a2cc7f39205b.tar.xz linux-dev-4d86dfbbda09b3c67bcaeb370f22a2cc7f39205b.zip | |
ARC: kprobes support
Origin port done by Rajeshwar Ranga
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Cc: Rajeshwar Ranga <rajeshwar.ranga@gmail.com>
Diffstat (limited to 'arch/arc/kernel/traps.c')
| -rw-r--r-- | arch/arc/kernel/traps.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/arc/kernel/traps.c b/arch/arc/kernel/traps.c index fd2457cec226..c6396b48fcd2 100644 --- a/arch/arc/kernel/traps.c +++ b/arch/arc/kernel/traps.c @@ -15,6 +15,7 @@ #include <linux/uaccess.h> #include <asm/ptrace.h> #include <asm/setup.h> +#include <asm/kprobes.h> void __init trap_init(void) { @@ -90,6 +91,7 @@ void do_machine_check_fault(unsigned long cause, unsigned long address, die("Machine Check Exception", regs, address, cause); } + /* * Entry point for traps induced by ARCompact TRAP_S <n> insn * This is same family as TRAP0/SWI insn (use the same vector). @@ -109,6 +111,10 @@ void do_non_swi_trap(unsigned long cause, unsigned long address, trap_is_brkpt(cause, address, regs); break; + case 2: + trap_is_kprobe(param, address, regs); + break; + default: break; } @@ -116,10 +122,17 @@ void do_non_swi_trap(unsigned long cause, unsigned long address, /* * Entry point for Instruction Error Exception + * -For a corner case, ARC kprobes implementation resorts to using + * this exception, hence the check */ void do_insterror_or_kprobe(unsigned long cause, unsigned long address, struct pt_regs *regs) { + /* Check if this exception is caused by kprobes */ + if (notify_die(DIE_IERR, "kprobe_ierr", regs, address, + cause, SIGILL) == NOTIFY_STOP) + return; + insterror_is_error(cause, address, regs); } |