* gdb.base/gdb1476.exp: Only run the tests if we can't read the

memory at address 0.

diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index 3d96343d1bc5e47a930b2ec5929045cc2365e744..32b69851639b83c19439ffec1560098c3fd320bd 100644 (file)
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2004-01-07  Mark Kettenis  <kettenis@gnu.org>
+
+       * gdb.base/gdb1476.exp: Only run the tests if we can't read the
+       memory at address 0.
+
 2004-01-07  Michael Chastain  <mec.gnu@mindspring.com>
 
        * gdb.stabs/weird.exp: Use hp_cc_compiler and hp_aCC_compiler

diff --git a/gdb/testsuite/gdb.base/gdb1476.exp b/gdb/testsuite/gdb.base/gdb1476.exp
index a65157a8d4a0e8841c1286fc236908ab904eee6e..ed338db9ee6c2ee510816daaf7017d7d4efbe873 100644 (file)
--- a/gdb/testsuite/gdb.base/gdb1476.exp
+++ b/gdb/testsuite/gdb.base/gdb1476.exp
@@ -48,6 +48,21 @@ if ![runto_main] then {
     gdb_suppress_tests
 }
 
+# If we can examine what's at memory address 0, it is possible that we
+# could also execute it.  This could pobably make us run away,
+# executing random code, which could have all sorts of ill effects,
+# especially on targets without an MMU.  Don't run the tests in that
+# case.
+
+send_gdb "x 0\n"
+gdb_expect {
+    -re "0x0:.*Error accessing memory address 0x0.*$gdb_prompt $" { }
+    -re ".*$gdb_prompt $" {
+       untested "Memory at address 0 is possibly executable"
+       return
+    }
+}
+
 gdb_test "continue" "Program received signal SIGSEGV.*" \
        "continue to null pointer call"