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| -rw-r--r-- | ChangeLog | 5 | ||||
| -rw-r--r-- | fat-setup.h | 9 |
2 files changed, 14 insertions, 0 deletions
@@ -1,3 +1,8 @@ +2015-09-02 Niels Möller <nisse@lysator.liu.se> + + * fat-setup.h: Disable use of ifunc, since it breaks dlopen with + RTLD_NOW. + 2015-08-25 Niels Möller <nisse@lysator.liu.se> * NEWS: Started on entries for Nettle-3.2. diff --git a/fat-setup.h b/fat-setup.h index 09e8c371..eb7166a7 100644 --- a/fat-setup.h +++ b/fat-setup.h @@ -77,6 +77,15 @@ # endif #endif +/* Disable use of ifunc for now. Problem is, there's no guarantee that + one can call any libc functions from the ifunc resolver. On x86 and + x86_64, the corresponding IRELATIVE relocs are supposed to be + processed last, but that doesn't seem to happen, and its a + platform-specific feature. To trigger problems, simply try dlopen + ("libnettle.so", RTLD_NOW), which crashes in an uninitialized plt + entry. */ +#undef HAVE_LINK_IFUNC + #if !HAVE_SECURE_GETENV #define secure_getenv(s) NULL #endif |