From 86f2552bbd0e17b19bb5e9881042533eaea553c7 Mon Sep 17 00:00:00 2001 From: Martin Schwidefsky Date: Mon, 17 May 2010 10:00:05 +0200 Subject: [S390] add breaking event address for user space Copy the last breaking event address from the lowcore to a new field in the thread_struct on each system entry. Add a new ptrace request PTRACE_GET_LAST_BREAK and a new utrace regset REGSET_LAST_BREAK to query the last breaking event. This is useful for debugging wild branches in user space code. Signed-off-by: Martin Schwidefsky --- arch/s390/include/asm/ptrace.h | 3 ++- arch/s390/include/asm/thread_info.h | 1 + 2 files changed, 3 insertions(+), 1 deletion(-) (limited to 'arch/s390/include') diff --git a/arch/s390/include/asm/ptrace.h b/arch/s390/include/asm/ptrace.h index fef9b33cdd59..e2c218dc68a6 100644 --- a/arch/s390/include/asm/ptrace.h +++ b/arch/s390/include/asm/ptrace.h @@ -328,8 +328,8 @@ struct pt_regs psw_t psw; unsigned long gprs[NUM_GPRS]; unsigned long orig_gpr2; - unsigned short svcnr; unsigned short ilc; + unsigned short svcnr; }; #endif @@ -436,6 +436,7 @@ typedef struct #define PTRACE_PEEKDATA_AREA 0x5003 #define PTRACE_POKETEXT_AREA 0x5004 #define PTRACE_POKEDATA_AREA 0x5005 +#define PTRACE_GET_LAST_BREAK 0x5006 /* * PT_PROT definition is loosely based on hppa bsd definition in diff --git a/arch/s390/include/asm/thread_info.h b/arch/s390/include/asm/thread_info.h index 34f0873d6525..be3d3f91d86c 100644 --- a/arch/s390/include/asm/thread_info.h +++ b/arch/s390/include/asm/thread_info.h @@ -50,6 +50,7 @@ struct thread_info { struct restart_block restart_block; __u64 user_timer; __u64 system_timer; + unsigned long last_break; /* last breaking-event-address. */ }; /* -- cgit v1.2.2