diff options
| author | Kyle McMartin <kyle@mcmartin.ca> | 2009-07-05 14:36:16 -0400 |
|---|---|---|
| committer | Kyle McMartin <kyle@ihatethathostname.lab.bos.redhat.com> | 2009-09-27 23:07:22 -0400 |
| commit | 2798af1abb5d560b926fd07ec58c5dcc6d3484d8 (patch) | |
| tree | 1c3d953ce653784ed8055fad82ef34499c036f27 /arch/parisc/kernel/ptrace.c | |
| parent | 5837d42f8ae9874fd93928c6784b2224f0edd4c9 (diff) | |
parisc: split syscall_trace into two halves
Instead of fiddling with gr[20], restructure code to return whether
or not to -ENOSYS. (Also do a bit of fiddling to let them take
pt_regs directly instead of re-computing it.)
Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
Diffstat (limited to 'arch/parisc/kernel/ptrace.c')
| -rw-r--r-- | arch/parisc/kernel/ptrace.c | 25 |
1 files changed, 12 insertions, 13 deletions
diff --git a/arch/parisc/kernel/ptrace.c b/arch/parisc/kernel/ptrace.c index 2118ed02e886..08f6d2cbf0e0 100644 --- a/arch/parisc/kernel/ptrace.c +++ b/arch/parisc/kernel/ptrace.c @@ -264,20 +264,19 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request, } #endif +long do_syscall_trace_enter(struct pt_regs *regs) +{ + if (test_thread_flag(TIF_SYSCALL_TRACE) && + tracehook_report_syscall_entry(regs)) + return -1L; + + return regs->gr[20]; +} -void syscall_trace(int why) +void do_syscall_trace_exit(struct pt_regs *regs) { - struct pt_regs *regs = ¤t->thread.regs; + int stepping = !!(current->ptrace & (PT_SINGLESTEP|PT_BLOCKSTEP)); - if (!test_thread_flag(TIF_SYSCALL_TRACE)) - return; - /* - * Report the system call for tracing. Entry tracing can - * decide to abort the call. We handle that by setting an - * invalid syscall number (-1) to force an ENOSYS error. - */ - if (why) - tracehook_report_syscall_exit(regs, 0); - else if (tracehook_report_syscall_entry(regs)) - regs->gr[20] = -1; /* force ENOSYS */ + if (stepping || test_thread_flag(TIF_SYSCALL_TRACE)) + tracehook_report_syscall_exit(regs, stepping); } |