Changeset 1bade3f for chapter08/gcc.xml

Timestamp:

09/10/2022 11:41:38 AM (20 months ago)

Author:

Pierre Labastie <pierre.labastie@…>

Branches:

11.3, 11.3-rc1, 12.0, 12.0-rc1, 12.1, 12.1-rc1, bdubbs/gcc13, multilib, renodr/libudev-from-systemd, trunk, xry111/arm64, xry111/arm64-12.0, xry111/clfs-ng, xry111/loongarch, xry111/loongarch-12.0, xry111/loongarch-12.1, xry111/mips64el, xry111/pip3, xry111/rust-wip-20221008, xry111/update-glibc

Children:

8d3b254

Parents:

0611f706

Message:

Document the --enable-default-pie/ssp options

Also document test failures in gcc chapter 8

File:

• chapter08/gcc.xml (modified) (2 diffs)

chapter08/gcc.xml

@@ -107 +107 @@
     </variablelist>
 
+    <note id="pie-ssp-info" xreflabel="note on PIE and SSP">
+      <para>
+        PIE (position independent executable) is a technique to produce
+        binary programs that can be loaded anywhere in memory. Together
+        with a feature named ASLR (Address Space Layout Randomization),
+        this allows programs to never have the same memory layout,
+        thus defeating attacks based on reproducible memory patterns.
+      </para>
+      <para>
+        SSP (Stack Smashing Protection) is a technique to ensure
+        that the parameter stack is not corrupted. Stack corruption can
+        for example alter the return address of a subroutine,
+        which would allow transferring control to an attacker program instead
+        of the original one.
+      </para>
+    </note>
+
     <para>Compile the package:</para>
 
@@ -139 +156 @@
     url="&test-results;"/> and
     <ulink url="https://gcc.gnu.org/ml/gcc-testresults/"/>.</para>
+
+    <para>In gcc, eleven tests, in the i386 test suite are known to FAIL.
+    It's because the test files do not account for the
+    <parameter>--enable-default-pie</parameter> option.</para>
 
     <para>In g++, four tests related to PR100400 are known to be reported