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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2011-07-24 12:48:33 +0400
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2011-07-24 12:48:23 +0400
commit73b7d40ff1bcd44b4245c2714b88cf872fe44685 (patch)
tree970d0fa379af2c39a45fb2cd48063634eab18213
parent4fa52aa7a82f9226b3874a69816bda3af821f002 (diff)
downloadlinux-73b7d40ff1bcd44b4245c2714b88cf872fe44685.tar.xz
[S390] use siginfo for sigtrap signals
Provide additional information on SIGTRAP by using a sig_info signal. Use TRAP_BRKPT for breakpoints via illegal operation and TRAP_HWBKPT for breakpoints via program event recording. Provide the address of the instruction that caused the breakpoint via si_addr. While we are at it get rid of tracehook_consider_fatal_signal. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
-rw-r--r--arch/s390/kernel/traps.c23
1 files changed, 17 insertions, 6 deletions
diff --git a/arch/s390/kernel/traps.c b/arch/s390/kernel/traps.c
index f386e167277a..e9372c77cced 100644
--- a/arch/s390/kernel/traps.c
+++ b/arch/s390/kernel/traps.c
@@ -18,7 +18,7 @@
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/errno.h>
-#include <linux/tracehook.h>
+#include <linux/ptrace.h>
#include <linux/timer.h>
#include <linux/mm.h>
#include <linux/smp.h>
@@ -325,10 +325,17 @@ static inline void __user *get_psw_address(struct pt_regs *regs,
void __kprobes do_per_trap(struct pt_regs *regs)
{
+ siginfo_t info;
+
if (notify_die(DIE_SSTEP, "sstep", regs, 0, 0, SIGTRAP) == NOTIFY_STOP)
return;
- if (current->ptrace)
- force_sig(SIGTRAP, current);
+ if (!current->ptrace)
+ return;
+ info.si_signo = SIGTRAP;
+ info.si_errno = 0;
+ info.si_code = TRAP_HWBKPT;
+ info.si_addr = (void *) current->thread.per_event.address;
+ force_sig_info(SIGTRAP, &info, current);
}
static void default_trap_handler(struct pt_regs *regs, long pgm_int_code,
@@ -421,9 +428,13 @@ static void __kprobes illegal_op(struct pt_regs *regs, long pgm_int_code,
if (get_user(*((__u16 *) opcode), (__u16 __user *) location))
return;
if (*((__u16 *) opcode) == S390_BREAKPOINT_U16) {
- if (current->ptrace)
- force_sig(SIGTRAP, current);
- else
+ if (current->ptrace) {
+ info.si_signo = SIGTRAP;
+ info.si_errno = 0;
+ info.si_code = TRAP_BRKPT;
+ info.si_addr = location;
+ force_sig_info(SIGTRAP, &info, current);
+ } else
signal = SIGILL;
#ifdef CONFIG_MATHEMU
} else if (opcode[0] == 0xb3) {