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| author | Roland McGrath <roland@hack.frob.com> | 2011-07-14 19:09:27 -0700 |
|---|---|---|
| committer | Roland McGrath <roland@hack.frob.com> | 2011-07-14 19:09:27 -0700 |
| commit | 9fa2c03227e159050e9dc4ec1e315e5909901580 (patch) | |
| tree | 88b205ce926259885826bd312cfbc3514546cb57 /configure.in | |
| parent | defe906180bad4e356bb55b60b10abd41b7ee3a1 (diff) | |
| download | glibc-9fa2c03227e159050e9dc4ec1e315e5909901580.zip glibc-9fa2c03227e159050e9dc4ec1e315e5909901580.tar.gz glibc-9fa2c03227e159050e9dc4ec1e315e5909901580.tar.bz2 | |
Adjust relro test to work around GNU ld limitations.
Diffstat (limited to 'configure.in')
| -rw-r--r-- | configure.in | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/configure.in b/configure.in index d40bc64..55e5649 100644 --- a/configure.in +++ b/configure.in @@ -1607,7 +1607,14 @@ EOF AC_LANG_CONFTEST([AC_LANG_SOURCE([[ int _start (void) { return 42; } extern void _exit (int); +/* Since these pointers are const, they should go in rodata. + Since they refer to functions that have to be resolved by + dynamic linking, they should instead go in RELRO data. */ const void *const relro[] = { &_start, &_exit, 0 }; +/* GNU ld fails to produce RELRO data when it's very small and there is no + normal writable data following it, or if only uninitialized (.bss) data + follows it, or only very small writable data. */ +int data[0x10000] = { 1, }; ]])]) cat > conftest.awk <<\EOF BEGIN { |