Uses <asm/syscall.h> when available.

2009-04-09  David Smith  <dsmith@redhat.com>

        * buildrun.cxx (compile_pass): Compile autoconf test for
        <asm/syscall.h>.
        * runtime/autoconf-asm-syscall.c: New "autoconf" test the presence
        of <asm/syscall.h>.
        * runtime/syscall.h: If <asm/syscall.h> exists, use it.
        Otherwise, use our private copy of the functions for each
        architecture.
        (syscall_get_nr): Renamed from __stp_user_syscall_nr().
        (syscall_get_return_value): Renamed from
        __stp_user_syscall_return_value().
        (syscall_get_arguments): Renamed from __stp_user_syscall_arg().
        * runtime/task_finder.c
        (__stp_utrace_task_finder_target_syscall_exit): Uses new syscall.h
        functions.
        * tapset/utrace.stp: Ditto.

1 files changed, 5 insertions, 3 deletions

diff --git a/tapset/utrace.stp b/tapset/utrace.stp
index 34cb32c5..00f427e6 100644
--- a/tapset/utrace.stp
+++ b/tapset/utrace.stp
@@ -6,13 +6,15 @@
 %}
 
 function _utrace_syscall_nr:long () %{
-   THIS->__retvalue = __stp_user_syscall_nr(CONTEXT->regs); /* pure */
+   THIS->__retvalue = syscall_get_nr(current, CONTEXT->regs); /* pure */
 %}
 
 function _utrace_syscall_arg:long (n:long) %{
-   THIS->__retvalue = *__stp_user_syscall_arg(current, CONTEXT->regs, (int)THIS->n); /* pure */
+   unsigned long arg = 0; /* pure */
+   syscall_get_arguments(current, CONTEXT->regs, (int)THIS->n, 1, &arg);
+   THIS->__retvalue = arg;
 %}
 
 function _utrace_syscall_return:long () %{
-   THIS->__retvalue = *__stp_user_syscall_return_value(current, CONTEXT->regs); /* pure */
+   THIS->__retvalue = syscall_get_return_value(current, CONTEXT->regs); /* pure */
 %}