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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 13:14:46 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 13:14:46 +0000 |
| commit | 025c439e829e0db9ac511cd9c1b8d5fd53475ead (patch) | |
| tree | fa6986b4690f991613ffb97cea1f6942427baf5d /m4/pie.m4 | |
| parent | Initial commit. (diff) | |
| download | sudo-025c439e829e0db9ac511cd9c1b8d5fd53475ead.tar.xz sudo-025c439e829e0db9ac511cd9c1b8d5fd53475ead.zip | |
Adding upstream version 1.9.15p5.upstream/1.9.15p5upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'm4/pie.m4')
| -rw-r--r-- | m4/pie.m4 | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/m4/pie.m4 b/m4/pie.m4 new file mode 100644 index 0000000..f2eb470 --- /dev/null +++ b/m4/pie.m4 @@ -0,0 +1,86 @@ +AC_DEFUN([SUDO_CHECK_PIE_SUPPORT], [ + dnl + dnl Check for PIE executable support if using gcc. + dnl This test relies on AC_LANG_WERROR + dnl + if test -n "$GCC"; then + if test X"$enable_pie" = X""; then + case "$host_os" in + linux*) + # Attempt to build with PIE support + enable_pie="maybe" + ;; + esac + fi + if test X"$enable_pie" != X""; then + if test "$enable_pie" = "no"; then + AX_CHECK_COMPILE_FLAG([-fno-pie], [ + _CFLAGS="$CFLAGS" + CFLAGS="$CFLAGS -fno-pie" + AX_CHECK_LINK_FLAG([-nopie], [ + PIE_CFLAGS="-fno-pie" + PIE_LDFLAGS="-nopie" + ]) + CFLAGS="$_CFLAGS" + ]) + else + AX_CHECK_COMPILE_FLAG([-fPIE], [ + _CFLAGS="$CFLAGS" + CFLAGS="$CFLAGS -fPIE" + _LDFLAGS="$LDFLAGS" + AX_CHECK_LINK_FLAG([-pie], [ + if test "$enable_pie" = "maybe"; then + LDFLAGS="$LDFLAGS -pie" + SUDO_WORKING_PIE([enable_pie=yes], []) + fi + if test "$enable_pie" = "yes"; then + PIE_CFLAGS="-fPIE" + PIE_LDFLAGS="-Wc,-fPIE -pie" + fi + ]) + CFLAGS="$_CFLAGS" + LDFLAGS="$_LDFLAGS" + ]) + fi + fi + fi + if test X"$enable_pie" != X"no" -a X"$with_gnu_ld" = X"no"; then + # Solaris 11.1 and higher ld supports PIE executables, ASLR, + # non-executable stack and non-executable heap. + case "$host_os" in + solaris2.1[[1-9]]|solaris2.[[2-9]][[0-9]]) + # This assumes lt_prog_compiler_pic is a single flag, + # which is the case on Solaris. + if test -n "$lt_prog_compiler_pic"; then + _CFLAGS="$CFLAGS" + CFLAGS="$CFLAGS $lt_prog_compiler_pic" + _LDFLAGS="$LDFLAGS" + AX_CHECK_LINK_FLAG([-Wl,-ztype=pie], [ + # Try building PIE if not disabled. + if test X"$enable_pie" = X""; then + LDFLAGS="$LDFLAGS -Wl,-ztype=pie" + SUDO_WORKING_PIE([enable_pie=yes], []) + fi + if test "$enable_pie" = "yes"; then + PIE_CFLAGS="$lt_prog_compiler_pic" + PIE_LDFLAGS="-Wc,$lt_prog_compiler_pic -Wl,-ztype=pie" + fi + ]) + CFLAGS="$_CFLAGS" + LDFLAGS="$_LDFLAGS" + fi + # These flags are only valid when linking an executable + # so we cannot add them to HARDENING_LDFLAGS. + AX_CHECK_LINK_FLAG([-Wl,-zaslr], [ + AX_APPEND_FLAG([-Wl,-zaslr], [PIE_LDFLAGS]) + ]) + AX_CHECK_LINK_FLAG([-Wl,-znxheap], [ + AX_APPEND_FLAG([-Wl,-znxheap], [PIE_LDFLAGS]) + ]) + AX_CHECK_LINK_FLAG([-Wl,-znxstack], [ + AX_APPEND_FLAG([-Wl,-znxstack], [PIE_LDFLAGS]) + ]) + ;; + esac + fi +]) |