diff options
| author | Wade Farnsworth <wade_farnsworth@mentor.com> | 2012-04-04 16:19:47 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2012-04-25 19:49:28 +0100 |
| commit | 0693bf68148c4473158e435383e75af70b704f78 (patch) | |
| tree | 8bb62e5b4ad99f9dd87d90949b0772cb81cdd96f | |
| parent | bf2c9f9866928df60157bc4f1ab39f93a32c754e (diff) | |
ARM: 7374/1: add TRACEHOOK support
Add calls to tracehook_report_syscall_{entry,exit} and tracehook_signal_handler
Signed-off-by: Steven Walter <stevenrwalter@gmail.com>
Signed-off-by: Wade Farnsworth <wade_farnsworth@mentor.com>
Reviewed-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| -rw-r--r-- | arch/arm/Kconfig | 1 | ||||
| -rw-r--r-- | arch/arm/include/asm/ptrace.h | 5 | ||||
| -rw-r--r-- | arch/arm/kernel/ptrace.c | 21 | ||||
| -rw-r--r-- | arch/arm/kernel/signal.c | 2 |
4 files changed, 14 insertions, 15 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 8b0c8ab53cb4..f5e4233766e3 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -11,6 +11,7 @@ config ARM select HAVE_OPROFILE if (HAVE_PERF_EVENTS) select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL select HAVE_ARCH_KGDB + select HAVE_ARCH_TRACEHOOK select HAVE_KPROBES if !XIP_KERNEL select HAVE_KRETPROBES if (HAVE_KPROBES) select HAVE_FUNCTION_TRACER if (!XIP_KERNEL) diff --git a/arch/arm/include/asm/ptrace.h b/arch/arm/include/asm/ptrace.h index 451808ba1211..355ece523f41 100644 --- a/arch/arm/include/asm/ptrace.h +++ b/arch/arm/include/asm/ptrace.h @@ -249,6 +249,11 @@ static inline unsigned long kernel_stack_pointer(struct pt_regs *regs) return regs->ARM_sp; } +static inline unsigned long user_stack_pointer(struct pt_regs *regs) +{ + return regs->ARM_sp; +} + #endif /* __KERNEL__ */ #endif /* __ASSEMBLY__ */ diff --git a/arch/arm/kernel/ptrace.c b/arch/arm/kernel/ptrace.c index 80abafb9bf33..50d5a7d1da36 100644 --- a/arch/arm/kernel/ptrace.c +++ b/arch/arm/kernel/ptrace.c @@ -24,6 +24,7 @@ #include <linux/hw_breakpoint.h> #include <linux/regset.h> #include <linux/audit.h> +#include <linux/tracehook.h> #include <asm/pgtable.h> #include <asm/traps.h> @@ -931,24 +932,14 @@ asmlinkage int syscall_trace(int why, struct pt_regs *regs, int scno) if (!test_thread_flag(TIF_SYSCALL_TRACE)) return scno; - if (!(current->ptrace & PT_PTRACED)) - return scno; current_thread_info()->syscall = scno; - /* the 0x80 provides a way for the tracing parent to distinguish - between a syscall stop and SIGTRAP delivery */ - ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD) - ? 0x80 : 0)); - /* - * this isn't the same as continuing with a signal, but it will do - * for normal use. strace only continues with a signal if the - * stopping signal is not SIGTRAP. -brl - */ - if (current->exit_code) { - send_sig(current->exit_code, current, 1); - current->exit_code = 0; - } + if (why) + tracehook_report_syscall_exit(regs, 0); + else if (tracehook_report_syscall_entry(regs)) + current_thread_info()->syscall = -1; + regs->ARM_ip = ip; return current_thread_info()->syscall; diff --git a/arch/arm/kernel/signal.c b/arch/arm/kernel/signal.c index 7cb532fc8aa4..6e67f1bf1a6a 100644 --- a/arch/arm/kernel/signal.c +++ b/arch/arm/kernel/signal.c @@ -636,6 +636,8 @@ handle_signal(unsigned long sig, struct k_sigaction *ka, */ block_sigmask(ka, sig); + tracehook_signal_handler(sig, info, ka, regs, 0); + return 0; } |