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authorRoland McGrath <roland@gnu.org>1995-10-05 09:00:06 +0000
committerRoland McGrath <roland@gnu.org>1995-10-05 09:00:06 +0000
commit6a76c115150318eae5d02eca76f2fc03be7bd029 (patch)
tree70a777331f79484d2d72583dfda40f5125864355 /elf
parent57aefafe56f066b56031187ea26e49df076f2ac9 (diff)
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Thu Oct 5 00:59:58 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu>
* elf/rtld.c (dl_main): Grok --list flag. * sysdeps/mach/hurd/dl-sysdep.c (_dl_sysdep_start): Ignore -- args. * sysdeps/mach/hurd/dl-sysdep.c (_dl_sysdep_message): New function. * sysdeps/generic/dl-sysdep.c (_dl_sysdep_message): New function. * elf/link.h (_dl_sysdep_message): Declare it.
Diffstat (limited to 'elf')
-rw-r--r--elf/link.h5
-rw-r--r--elf/rtld.c33
2 files changed, 36 insertions, 2 deletions
diff --git a/elf/link.h b/elf/link.h
index 0388c02202..4848f4b99b 100644
--- a/elf/link.h
+++ b/elf/link.h
@@ -120,6 +120,11 @@ extern int _dl_zerofd;
/* OS-dependent function to open the zero-fill device. */
extern int _dl_sysdep_open_zero_fill (void); /* dl-sysdep.c */
+/* OS-dependent function to write a message on the standard output.
+ All arguments are `const char *'; args until a null pointer
+ are concatenated to form the message to print. */
+extern void _dl_sysdep_message (const char *string, ...);
+
/* OS-dependent function to give a fatal error message and exit
when the dynamic linker fails before the program is fully linked.
All arguments are `const char *'; args until a null pointer
diff --git a/elf/rtld.c b/elf/rtld.c
index 276ff51e57..6be05eb299 100644
--- a/elf/rtld.c
+++ b/elf/rtld.c
@@ -22,6 +22,7 @@ Cambridge, MA 02139, USA. */
#include <stddef.h>
#include <stdlib.h>
#include <unistd.h>
+#include "../stdio/_itoa.h"
#ifdef RTLD_START
@@ -113,6 +114,7 @@ dl_main (const Elf32_Phdr *phdr,
struct link_map *l;
const char *interpreter_name;
int lazy;
+ int list_only = 0;
if (*user_entry == (Elf32_Addr) &_start)
{
@@ -133,7 +135,7 @@ dl_main (const Elf32_Phdr *phdr,
installing it. */
if (_dl_argc < 2)
_dl_sysdep_fatal ("\
-Usage: ld.so EXECUTABLE-FILE [ARGS-FOR-PROGRAM...]\n\
+Usage: ld.so [--list] EXECUTABLE-FILE [ARGS-FOR-PROGRAM...]\n\
You have invoked `ld.so', the helper program for shared library executables.\n\
This program usually lives in the file `/lib/ld.so', and special directives\n\
in executable files using ELF shared libraries tell the system's program\n\
@@ -147,10 +149,21 @@ file you run. This is mostly of use for maintainers to test new versions\n\
of this helper program; chances are you did not intend to run this program.\n",
NULL);
- ++_dl_skip_args;
interpreter_name = _dl_argv[0];
+
+ if (! strcmp (_dl_argv[1], "--list"))
+ {
+ list_only = 1;
+
+ ++_dl_skip_args;
+ --_dl_argc;
+ ++_dl_argv;
+ }
+
+ ++_dl_skip_args;
--_dl_argc;
++_dl_argv;
+
l = _dl_map_object (NULL, _dl_argv[0]);
phdr = l->l_phdr;
phent = l->l_phnum;
@@ -265,6 +278,22 @@ of this helper program; chances are you did not intend to run this program.\n",
dl_r_debug.r_version = 1 /* R_DEBUG_VERSION XXX */;
dl_r_debug.r_map = _dl_loaded;
dl_r_debug.r_brk = (Elf32_Addr) &_dl_r_debug_state;
+
+ if (list_only)
+ {
+ for (l = _dl_loaded->l_next; l; l = l->l_next)
+ {
+ char buf[20], *bp;
+ buf[sizeof buf - 1] = '\0';
+ bp = _itoa (l->l_addr, &buf[sizeof buf - 1], 16, 0);
+ while (&buf[sizeof buf - 1] - bp < sizeof l->l_addr * 2)
+ *--bp = '0';
+ _dl_sysdep_message ("\t", l->l_libname, " => ", l->l_name,
+ " (0x", bp, ")\n", NULL);
+ }
+
+ _exit (0);
+ }
}
const char *errstring;
const char *errobj;