configure.ac: Test for the name of the symbol used for the entry point...
* configure.ac: Test for the name of the symbol used for the entry point; define ENTRY_POINT to the result. * configure: Regenerate. * config.h.in: Regenerate. * mf-heuristics.c: Replace _start with ENTRY_POINT throughout. From-SVN: r103113
This commit is contained in:
Maciej W. Rozycki
Maciej W. Rozycki
parent
a73035ae3b
commit
7741b4512d
5 changed files with 101 additions and 4 deletions
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@ -1,3 +1,11 @@
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2005-08-15 Maciej W. Rozycki <macro@linux-mips.org>
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* configure.ac: Test for the name of the symbol used for the entry
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point; define ENTRY_POINT to the result.
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* configure: Regenerate.
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* config.h.in: Regenerate.
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* mf-heuristics.c: Replace _start with ENTRY_POINT throughout.
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2005-08-14 Ulrich Weigand <weigand@informatik.uni-erlangen.de>
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* mf-runtime.c (__mf_state_1): Initialize to reentrant.
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@ -1,5 +1,8 @@
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/* config.h.in. Generated from configure.ac by autoheader. */
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/* Define to the name of the symbol used for the entry point. */
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#undef ENTRY_POINT
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/* Define to 1 if you have the `addmntent' function. */
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#undef HAVE_ADDMNTENT
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70
libmudflap/configure
vendored
70
libmudflap/configure
vendored
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@ -6894,6 +6894,76 @@ echo "${ECHO_T}$ac_fdsections" >&6
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# Check for the name of the symbol used for the entry point.
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echo "$as_me:$LINENO: checking for the name of the symbol used for the entry point" >&5
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echo $ECHO_N "checking for the name of the symbol used for the entry point... $ECHO_C" >&6
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if test "${mudflap_cv_entry_point+set}" = set; then
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echo $ECHO_N "(cached) $ECHO_C" >&6
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else
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for name in _start __start unknown; do
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cat >conftest.$ac_ext <<_ACEOF
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/* confdefs.h. */
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_ACEOF
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cat confdefs.h >>conftest.$ac_ext
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cat >>conftest.$ac_ext <<_ACEOF
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/* end confdefs.h. */
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extern char $name;
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int
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main ()
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{
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$name = 0;
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;
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return 0;
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}
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_ACEOF
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rm -f conftest.$ac_objext conftest$ac_exeext
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if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
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(eval $ac_link) 2>conftest.er1
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ac_status=$?
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grep -v '^ *+' conftest.er1 >conftest.err
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rm -f conftest.er1
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cat conftest.err >&5
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echo "$as_me:$LINENO: \$? = $ac_status" >&5
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(exit $ac_status); } &&
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{ ac_try='test -z "$ac_c_werror_flag"
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|| test ! -s conftest.err'
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{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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echo "$as_me:$LINENO: \$? = $ac_status" >&5
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(exit $ac_status); }; } &&
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{ ac_try='test -s conftest$ac_exeext'
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{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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echo "$as_me:$LINENO: \$? = $ac_status" >&5
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(exit $ac_status); }; }; then
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break
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else
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echo "$as_me: failed program was:" >&5
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sed 's/^/| /' conftest.$ac_ext >&5
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fi
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rm -f conftest.err conftest.$ac_objext \
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conftest$ac_exeext conftest.$ac_ext
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done
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mudflap_cv_entry_point="$name"
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fi
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echo "$as_me:$LINENO: result: $mudflap_cv_entry_point" >&5
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echo "${ECHO_T}$mudflap_cv_entry_point" >&6
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if test "$mudflap_cv_entry_point" = unknown; then
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{ { echo "$as_me:$LINENO: error: none of the known symbol names works" >&5
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echo "$as_me: error: none of the known symbol names works" >&2;}
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{ (exit 1); exit 1; }; }
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fi
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cat >>confdefs.h <<_ACEOF
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#define ENTRY_POINT $mudflap_cv_entry_point
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_ACEOF
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if test ${multilib} = yes; then
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multilib_arg="--enable-multilib"
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else
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@ -223,6 +223,21 @@ AC_MSG_RESULT($ac_fdsections)
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AC_SUBST(SECTION_FLAGS)
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# Check for the name of the symbol used for the entry point.
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AC_CACHE_CHECK([for the name of the symbol used for the entry point],
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[mudflap_cv_entry_point], [
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for name in _start __start unknown; do
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AC_LINK_IFELSE([AC_LANG_PROGRAM([extern char $name;], [$name = 0;])],
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[break])
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done
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mudflap_cv_entry_point="$name"])
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if test "$mudflap_cv_entry_point" = unknown; then
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AC_MSG_ERROR([none of the known symbol names works])
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fi
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AC_DEFINE_UNQUOTED([ENTRY_POINT], [$mudflap_cv_entry_point],
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[Define to the name of the symbol used for the entry point.])
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if test ${multilib} = yes; then
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multilib_arg="--enable-multilib"
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else
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@ -43,7 +43,7 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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extern char _end;
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extern char _start;
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extern char ENTRY_POINT;
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/* Run some quick validation of the given region.
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@ -164,10 +164,11 @@ __mf_heuristic_check (uintptr_t ptr, uintptr_t ptr_high)
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}
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/* The third heuristic is to approve all accesses between _start and _end,
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which should include all text and initialized data. */
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/* The third heuristic is to approve all accesses between _start (or its
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equivalent for the given target) and _end, which should include all
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text and initialized data. */
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if (__mf_opts.heur_start_end)
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if (ptr >= (uintptr_t) & _start && ptr_high <= (uintptr_t) & _end)
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if (ptr >= (uintptr_t) & ENTRY_POINT && ptr_high <= (uintptr_t) & _end)
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return 1; /* uncacheable */
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return 0; /* unknown */
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