From 73b7d40ff1bcd44b4245c2714b88cf872fe44685 Mon Sep 17 00:00:00 2001 From: Martin Schwidefsky Date: Sun, 24 Jul 2011 10:48:33 +0200 Subject: [PATCH] [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 --- arch/s390/kernel/traps.c | 23 +++++++++++++++++------ 1 file 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 #include #include -#include +#include #include #include #include @@ -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) { -- 2.20.1