diff options
Diffstat (limited to 'rts/Linker.c')
| -rw-r--r-- | rts/Linker.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/rts/Linker.c b/rts/Linker.c index d297f3a8ff..b31142e8e4 100644 --- a/rts/Linker.c +++ b/rts/Linker.c @@ -870,7 +870,19 @@ SymbolAddr* lookupDependentSymbol (SymbolName* lbl, ObjectCode *dependent) IF_DEBUG(linker, debugBelch("lookupSymbol: symbol '%s' not found, trying dlsym\n", lbl)); # if defined(OBJFORMAT_ELF) - return internal_dlsym(lbl); + SymbolAddr *ret = internal_dlsym(lbl); + + // Generally the dynamic linker would define _DYNAMIC, which is + // supposed to point to various bits of dynamic linker state (see + // [1]). However, if dynamic linking isn't supported (e.g. in the case + // of musl) then we can safely declare that it is NULL. + // + // [1] https://wiki.gentoo.org/wiki/Hardened/Introduction_to_Position_Independent_Code + if (ret == NULL && strcmp(lbl, "_DYNAMIC") == 0) { + static void *RTS_DYNAMIC = NULL; + ret = (SymbolAddr *) &RTS_DYNAMIC; + } + return ret; # elif defined(OBJFORMAT_MACHO) /* HACK: On OS X, all symbols are prefixed with an underscore. |