Introduce a tdep_get_func_addr_hook() in the ELF lookup_symbol()
routine and add address-space argument. This is needed because on
PPC64, a the function-name symbol refers to a function descriptor
(unlike, for example, on ia64, where the @fptr() operator is needed to
refer to a function descriptor). Thus, in order to look up the name
of a function, we need to dereference the function descriptor. To
make matters more "interesting", the function descriptors are normally
resolved by the dynamic linker, so we can't get their values from the
ELF file. Instead, we have to read them from the running image, hence
the need for the address-space argument.
diff --git a/src/elfxx.h b/src/elfxx.h
index a12375b..7742806 100644
--- a/src/elfxx.h
+++ b/src/elfxx.h
@@ -1,6 +1,7 @@
/* libunwind - a platform-independent unwind library
Copyright (C) 2003, 2005 Hewlett-Packard Co
- Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+ Copyright (C) 2007 David Mosberger-Tang
+ Contributed by David Mosberger-Tang <dmosberger@gmail.com>
This file is part of libunwind.
@@ -68,6 +69,7 @@
}
extern int elf_w (valid_object) (struct elf_image *ei);
-extern int elf_w (get_proc_name) (pid_t pid, unw_word_t ip,
+extern int elf_w (get_proc_name) (unw_addr_space_t as,
+ pid_t pid, unw_word_t ip,
char *buf, size_t len,
unw_word_t *offp);