linker: Make the errors reported by dlopen/dlsym be more useful.
Changed it so that when the linker generates error messages, they are
scribbled away into a buffer that dlfcn and friends can read from.
Since the error messages are generetad with snprintf, and snprintf
MAY call malloc during some code paths, we now link against a version
of libc that does not contain malloc/free/realloc/calloc. We then define
malloc and friends in the dynamic loader, and make them abort() if they
are ever called.
Signed-off-by: Dima Zavin <dima@android.com>
diff --git a/linker/linker.h b/linker/linker.h
index d80c761..69042c0 100644
--- a/linker/linker.h
+++ b/linker/linker.h
@@ -204,6 +204,7 @@
unsigned unload_library(soinfo *si);
Elf32_Sym *lookup_in_library(soinfo *si, const char *name);
Elf32_Sym *lookup(const char *name, unsigned *base);
+const char *linker_get_error(void);
#ifdef ANDROID_ARM_LINKER
typedef long unsigned int *_Unwind_Ptr;