diff options
| -rw-r--r-- | ChangeLog | 9 | ||||
| -rw-r--r-- | elf/link.h | 5 | ||||
| -rw-r--r-- | elf/rtld.c | 33 | ||||
| -rw-r--r-- | sysdeps/generic/dl-sysdep.c | 16 | ||||
| -rw-r--r-- | sysdeps/mach/hurd/dl-sysdep.c | 24 |
5 files changed, 84 insertions, 3 deletions
@@ -1,5 +1,14 @@ +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. + Wed Oct 4 00:21:03 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu> + * 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. + * sysdeps/unix/Makefile ($(common-objpfx)ioctls): Remove NULL from the list. 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; diff --git a/sysdeps/generic/dl-sysdep.c b/sysdeps/generic/dl-sysdep.c index 49eaad6737..b7b895ffce 100644 --- a/sysdeps/generic/dl-sysdep.c +++ b/sysdeps/generic/dl-sysdep.c @@ -104,3 +104,19 @@ _dl_sysdep_fatal (const char *msg, ...) _exit (127); } + + +void +_dl_sysdep_message (const char *msg, ...) +{ + va_list ap; + + va_start (ap, msg); + do + { + size_t len = strlen (msg); + write (STDOUT_FILENO, msg, len); + msg = va_arg (ap, const char *); + } while (msg); + va_end (ap); +} diff --git a/sysdeps/mach/hurd/dl-sysdep.c b/sysdeps/mach/hurd/dl-sysdep.c index 2daf74957c..8e1ef174e2 100644 --- a/sysdeps/mach/hurd/dl-sysdep.c +++ b/sysdeps/mach/hurd/dl-sysdep.c @@ -116,7 +116,7 @@ unfmh(); /* XXX */ for example "-/lib/libc.so=123" says that the contents of /lib/libc.so are found in a memory object whose port name in our task is 123. */ - while (_dl_argc > 2 && _dl_argv[1][0] == '-') + while (_dl_argc > 2 && _dl_argv[1][0] == '-' && _dl_argv[1][1] != '-') { char *lastslash, *memobjname, *p; struct link_map *l; @@ -227,6 +227,28 @@ _dl_sysdep_fatal (const char *msg, ...) } +void +_dl_sysdep_message (const char *msg, ...) +{ + va_list ap; + + va_start (ap, msg); + do + { + size_t len = strlen (msg); + mach_msg_type_number_t nwrote; + do + { + if (__io_write (_hurd_init_dtable[1], msg, len, -1, &nwrote)) + break; + len -= nwrote; + msg += nwrote; + } while (nwrote > 0); + msg = va_arg (ap, const char *); + } while (msg); + va_end (ap); +} + /* Minimal open/close/mmap implementation sufficient for initial loading of shared libraries. These are weak definitions so that when the dynamic linker re-relocates itself to be user-visible (for -ldl), |