/* * XXX Check PT_DTRACE vs TIF_SINGLESTEP for singlestepping check and * PT_PTRACED vs TIF_SYSCALL_TRACE for syscall tracing check */ void syscall_trace_enter(struct pt_regs *regs) { audit_syscall_entry(UPT_SYSCALL_NR(®s->regs), UPT_SYSCALL_ARG1(®s->regs), UPT_SYSCALL_ARG2(®s->regs), UPT_SYSCALL_ARG3(®s->regs), UPT_SYSCALL_ARG4(®s->regs)); if (!test_thread_flag(TIF_SYSCALL_TRACE)) return; tracehook_report_syscall_entry(regs); }
/* * XXX Check PT_DTRACE vs TIF_SINGLESTEP for singlestepping check and * PT_PTRACED vs TIF_SYSCALL_TRACE for syscall tracing check */ void syscall_trace_enter(struct pt_regs *regs) { audit_syscall_entry(UPT_SYSCALL_NR(®s->regs), UPT_SYSCALL_ARG1(®s->regs), UPT_SYSCALL_ARG2(®s->regs), UPT_SYSCALL_ARG3(®s->regs), UPT_SYSCALL_ARG4(®s->regs)); if (!test_thread_flag(TIF_SYSCALL_TRACE)) return; /* Avoid "unused result" warning. */ if (tracehook_report_syscall_entry(regs)) return; }
/* * XXX Check PT_DTRACE vs TIF_SINGLESTEP for singlestepping check and * PT_PTRACED vs TIF_SYSCALL_TRACE for syscall tracing check */ void syscall_trace(struct uml_pt_regs *regs, int entryexit) { int is_singlestep = (current->ptrace & PT_DTRACE) && entryexit; int tracesysgood; if (unlikely(current->audit_context)) { if (!entryexit) audit_syscall_entry(HOST_AUDIT_ARCH, UPT_SYSCALL_NR(regs), UPT_SYSCALL_ARG1(regs), UPT_SYSCALL_ARG2(regs), UPT_SYSCALL_ARG3(regs), UPT_SYSCALL_ARG4(regs)); else audit_syscall_exit(AUDITSC_RESULT(UPT_SYSCALL_RET(regs)), UPT_SYSCALL_RET(regs)); } /* Fake a debug trap */ if (is_singlestep) send_sigtrap(current, regs, 0); if (!test_thread_flag(TIF_SYSCALL_TRACE)) return; if (!(current->ptrace & PT_PTRACED)) return; /* * the 0x80 provides a way for the tracing parent to distinguish * between a syscall stop and SIGTRAP delivery */ tracesysgood = (current->ptrace & PT_TRACESYSGOOD); ptrace_notify(SIGTRAP | (tracesysgood ? 0x80 : 0)); if (entryexit) /* force do_signal() --> is_syscall() */ set_thread_flag(TIF_SIGPENDING); /* * 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; } }