path: root/include/link.h
diff options
authorRich Felker <>2012-10-31 21:27:48 -0400
committerRich Felker <>2012-10-31 21:27:48 -0400
commit18c0e02e2bd53ceedbb843b06ff90890f1c734b0 (patch)
tree37c29715025d24e38415e72ac8ec896fb22a2dcf /include/link.h
parent76f28cfce59dfc499252c874f87c34567e6c86c6 (diff)
add dl_iterate_phdr interface
patches by Alex Caudill (npx). the dynamic-linked version is almost identical to the final submitted patch; I just added a couple missing lines for saving the phdr address when the dynamic linker is invoked directly to run a program, and removed a couple to avoid introducing another unnecessary type. the static-linked version is based on npx's draft. it could use some improvements which are contingent on the startup code saving some additional information for later use.
Diffstat (limited to 'include/link.h')
1 files changed, 27 insertions, 0 deletions
diff --git a/include/link.h b/include/link.h
new file mode 100644
index 00000000..d5160e7e
--- /dev/null
+++ b/include/link.h
@@ -0,0 +1,27 @@
+#ifndef _LINK_H
+#define _LINK_H
+#include <elf.h>
+#define __NEED_size_t
+#include <bits/alltypes.h>
+#if UINTPTR_MAX > 0xffffffff
+#define ElfW(type) Elf64_ ## type
+#define ElfW(type) Elf32_ ## type
+struct dl_phdr_info {
+ ElfW(Addr) dlpi_addr;
+ const char *dlpi_name;
+ const ElfW(Phdr) *dlpi_phdr;
+ ElfW(Half) dlpi_phnum;
+ unsigned long long int dlpi_adds;
+ unsigned long long int dlpi_subs;
+ size_t dlpi_tls_modid;
+ void *dlpi_tls_data;
+int dl_iterate_phdr(int (*)(struct dl_phdr_info *, size_t, void *), void *);