diff options
| -rw-r--r-- | arch/mips/include/asm/ptrace.h | 3 | ||||
| -rw-r--r-- | arch/mips/kernel/entry.S | 5 | ||||
| -rw-r--r-- | arch/mips/kernel/ptrace.c | 43 | ||||
| -rw-r--r-- | arch/mips/kernel/scall32-o32.S | 3 | ||||
| -rw-r--r-- | arch/mips/kernel/scall64-64.S | 3 | ||||
| -rw-r--r-- | arch/mips/kernel/scall64-n32.S | 3 | ||||
| -rw-r--r-- | arch/mips/kernel/scall64-o32.S | 3 |
7 files changed, 43 insertions, 20 deletions
diff --git a/arch/mips/include/asm/ptrace.h b/arch/mips/include/asm/ptrace.h index 9f1b8dba2c81..de39b1f343ea 100644 --- a/arch/mips/include/asm/ptrace.h +++ b/arch/mips/include/asm/ptrace.h @@ -141,7 +141,8 @@ extern int ptrace_set_watch_regs(struct task_struct *child, #define instruction_pointer(regs) ((regs)->cp0_epc) #define profile_pc(regs) instruction_pointer(regs) -extern asmlinkage void do_syscall_trace(struct pt_regs *regs, int entryexit); +extern asmlinkage void syscall_trace_enter(struct pt_regs *regs); +extern asmlinkage void syscall_trace_leave(struct pt_regs *regs); extern NORET_TYPE void die(const char *, struct pt_regs *) ATTRIB_NORET; diff --git a/arch/mips/kernel/entry.S b/arch/mips/kernel/entry.S index a917e34b792b..37acfa036d44 100644 --- a/arch/mips/kernel/entry.S +++ b/arch/mips/kernel/entry.S @@ -170,11 +170,10 @@ syscall_exit_work: li t0, _TIF_WORK_SYSCALL_EXIT and t0, a2 # a2 is preloaded with TI_FLAGS beqz t0, work_pending # trace bit set? - local_irq_enable # could let do_syscall_trace() + local_irq_enable # could let syscall_trace_leave() # call schedule() instead move a0, sp - li a1, 1 - jal do_syscall_trace + jal syscall_trace_leave b resume_userspace #if defined(CONFIG_CPU_MIPSR2) || defined(CONFIG_MIPS_MT) diff --git a/arch/mips/kernel/ptrace.c b/arch/mips/kernel/ptrace.c index 584e6b55c865..4e6ea1ffad46 100644 --- a/arch/mips/kernel/ptrace.c +++ b/arch/mips/kernel/ptrace.c @@ -533,15 +533,10 @@ static inline int audit_arch(void) * Notification of system call entry/exit * - triggered by current->work.syscall_trace */ -asmlinkage void do_syscall_trace(struct pt_regs *regs, int entryexit) +asmlinkage void syscall_trace_enter(struct pt_regs *regs) { /* do the secure computing check first */ - if (!entryexit) - secure_computing(regs->regs[2]); - - if (unlikely(current->audit_context) && entryexit) - audit_syscall_exit(AUDITSC_RESULT(regs->regs[7]), - -regs->regs[2]); + secure_computing(regs->regs[2]); if (!(current->ptrace & PT_PTRACED)) goto out; @@ -565,8 +560,40 @@ asmlinkage void do_syscall_trace(struct pt_regs *regs, int entryexit) } out: - if (unlikely(current->audit_context) && !entryexit) + if (unlikely(current->audit_context)) audit_syscall_entry(audit_arch(), regs->regs[2], regs->regs[4], regs->regs[5], regs->regs[6], regs->regs[7]); } + +/* + * Notification of system call entry/exit + * - triggered by current->work.syscall_trace + */ +asmlinkage void syscall_trace_leave(struct pt_regs *regs) +{ + if (unlikely(current->audit_context)) + audit_syscall_exit(AUDITSC_RESULT(regs->regs[7]), + -regs->regs[2]); + + if (!(current->ptrace & PT_PTRACED)) + return; + + if (!test_thread_flag(TIF_SYSCALL_TRACE)) + return; + + /* 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; + } +} diff --git a/arch/mips/kernel/scall32-o32.S b/arch/mips/kernel/scall32-o32.S index 7f1377eb22d3..7a8e1dd7f6f2 100644 --- a/arch/mips/kernel/scall32-o32.S +++ b/arch/mips/kernel/scall32-o32.S @@ -88,8 +88,7 @@ syscall_trace_entry: SAVE_STATIC move s0, t2 move a0, sp - li a1, 0 - jal do_syscall_trace + jal syscall_trace_enter move t0, s0 RESTORE_STATIC diff --git a/arch/mips/kernel/scall64-64.S b/arch/mips/kernel/scall64-64.S index 7c0ef7f128bf..2d31c83224f9 100644 --- a/arch/mips/kernel/scall64-64.S +++ b/arch/mips/kernel/scall64-64.S @@ -91,8 +91,7 @@ syscall_trace_entry: SAVE_STATIC move s0, t2 move a0, sp - li a1, 0 - jal do_syscall_trace + jal syscall_trace_enter move t0, s0 RESTORE_STATIC diff --git a/arch/mips/kernel/scall64-n32.S b/arch/mips/kernel/scall64-n32.S index de6c5563beab..38a0503b9a4a 100644 --- a/arch/mips/kernel/scall64-n32.S +++ b/arch/mips/kernel/scall64-n32.S @@ -89,8 +89,7 @@ n32_syscall_trace_entry: SAVE_STATIC move s0, t2 move a0, sp - li a1, 0 - jal do_syscall_trace + jal syscall_trace_enter move t0, s0 RESTORE_STATIC diff --git a/arch/mips/kernel/scall64-o32.S b/arch/mips/kernel/scall64-o32.S index b0541dda8830..91ea5e4041dd 100644 --- a/arch/mips/kernel/scall64-o32.S +++ b/arch/mips/kernel/scall64-o32.S @@ -123,8 +123,7 @@ trace_a_syscall: move s0, t2 # Save syscall pointer move a0, sp - li a1, 0 - jal do_syscall_trace + jal syscall_trace_enter move t0, s0 RESTORE_STATIC |