From d6b58772dc39262629708e5f3c30ef06de290894 Mon Sep 17 00:00:00 2001 From: Kyle McMartin Date: Sun, 26 Apr 2009 23:53:34 -0400 Subject: parisc: tracehook_report_syscall This makes parisc use the standard tracehook_report_syscall_entry and tracehook_report_syscall_exit hooks in . To do this, we need to access current->thread.regs, and to know whether we're entering or exiting the syscall, so add this to syscall_trace. Signed-off-by: Kyle McMartin --- arch/parisc/kernel/ptrace.c | 23 +++++++++++------------ arch/parisc/kernel/syscall.S | 4 +++- 2 files changed, 14 insertions(+), 13 deletions(-) diff --git a/arch/parisc/kernel/ptrace.c b/arch/parisc/kernel/ptrace.c index 927db36..2118ed0 100644 --- a/arch/parisc/kernel/ptrace.c +++ b/arch/parisc/kernel/ptrace.c @@ -13,6 +13,7 @@ #include #include #include +#include #include #include #include @@ -264,21 +265,19 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request, #endif -void syscall_trace(void) +void syscall_trace(int why) { + struct pt_regs *regs = ¤t->thread.regs; + if (!test_thread_flag(TIF_SYSCALL_TRACE)) return; - if (!(current->ptrace & PT_PTRACED)) - return; - 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 + * 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 (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)) + regs->gr[20] = -1; /* force ENOSYS */ } diff --git a/arch/parisc/kernel/syscall.S b/arch/parisc/kernel/syscall.S index 59fc1a43..5698668 100644 --- a/arch/parisc/kernel/syscall.S +++ b/arch/parisc/kernel/syscall.S @@ -288,6 +288,7 @@ tracesys: STREG %r18,PT_GR18(%r2) /* Finished saving things for the debugger */ + ldi 0,%r26 /* syscall entry */ ldil L%syscall_trace,%r1 ldil L%tracesys_next,%r2 be R%syscall_trace(%sr7,%r1) @@ -336,6 +337,7 @@ tracesys_exit: #ifdef CONFIG_64BIT ldo -16(%r30),%r29 /* Reference param save area */ #endif + ldi 1,%r26 /* syscall exit */ bl syscall_trace, %r2 STREG %r28,TASK_PT_GR28(%r1) /* save return value now */ ldo -THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1 /* get task ptr */ @@ -358,7 +360,7 @@ tracesys_sigexit: ldo -16(%r30),%r29 /* Reference param save area */ #endif bl syscall_trace, %r2 - nop + ldi 1,%r26 /* syscall exit */ ldil L%syscall_exit_rfi,%r1 be,n R%syscall_exit_rfi(%sr7,%r1) -- cgit v1.1