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Adjust relro test to work around GNU ld limitations.

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This commit is contained in:
Roland McGrath 2011-07-14 19:09:27 -07:00
parent defe906180
commit 9fa2c03227
3 changed files with 20 additions and 0 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
2011-07-14 Roland McGrath <roland@hack.frob.com>
* configure.in (-z relro check): Adjust test code to add a large
writable data section after it.
* configure: Regenerated.
2011-07-11 Roland McGrath <roland@hack.frob.com>
* configure.in (-z relro check): Fix test code to make the variable

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configure vendored
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@ -6404,7 +6404,14 @@ else
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, };
_ACEOF
cat > conftest.awk <<\EOF

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configure.in
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@ -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 {