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authorRoland McGrath <roland@gnu.org>1996-07-05 17:05:14 +0000
committerRoland McGrath <roland@gnu.org>1996-07-05 17:05:14 +0000
commitf5348425d095f93cce1532c7ca20915aea480868 (patch)
tree3c74c90bad1a39953be39bc190d6985b887320ef
parent503054c0dd57109017b36870c430dab00fccaa8b (diff)
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Fri Jul 5 12:22:51 1996 Roland McGrath <roland@delasyd.gnu.ai.mit.edu>
* elf/rtld.c: Define RTLD_BOOTSTRAP before #include "dynamic-link.h". * sysdeps/i386/dl-machine.h (elf_machine_rel): Remove weak decl for _dl_rtld_map. (RESOLVE): New macro, defined differently based on [RTLD_BOOTSTRAP]. (elf_machine_rel): Use it instead of testing fn ptr arg at runtime. (elf_machine_rel: case R_386_32) [! RTLD_BOOTSTRAP]: Declare _dl_rtld_map weak only here. * posix/unistd.h [__USE_BSD]: Declare getdomainname, setdomainname.
-rw-r--r--ChangeLog12
-rw-r--r--elf/rtld.c7
-rw-r--r--posix/unistd.h7
-rw-r--r--sysdeps/i386/dl-machine.h59
4 files changed, 59 insertions, 26 deletions
diff --git a/ChangeLog b/ChangeLog
index 965df55058..ec8b1c93fb 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,15 @@
+Fri Jul 5 12:22:51 1996 Roland McGrath <roland@delasyd.gnu.ai.mit.edu>
+
+ * elf/rtld.c: Define RTLD_BOOTSTRAP before #include "dynamic-link.h".
+ * sysdeps/i386/dl-machine.h (elf_machine_rel): Remove weak decl for
+ _dl_rtld_map.
+ (RESOLVE): New macro, defined differently based on [RTLD_BOOTSTRAP].
+ (elf_machine_rel): Use it instead of testing fn ptr arg at runtime.
+ (elf_machine_rel: case R_386_32) [! RTLD_BOOTSTRAP]: Declare
+ _dl_rtld_map weak only here.
+
+ * posix/unistd.h [__USE_BSD]: Declare getdomainname, setdomainname.
+
Wed Jul 3 16:29:41 1996 Roland McGrath <roland@delasyd.gnu.ai.mit.edu>
* nss/getXXbyYY_r.c (REENTRANT_NAME): Cast FCT in __nss_next call.
diff --git a/elf/rtld.c b/elf/rtld.c
index 8ec637f6a8..6baa7a868a 100644
--- a/elf/rtld.c
+++ b/elf/rtld.c
@@ -18,13 +18,18 @@ not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include <link.h>
-#include "dynamic-link.h"
#include <stddef.h>
#include <stdlib.h>
#include <unistd.h>
#include "../stdio-common/_itoa.h"
+/* This #define produces dynamic linking inline functions for
+ bootstrap relocation instead of general-purpose relocation. */
+#define RTLD_BOOTSTRAP
+#include "dynamic-link.h"
+
+
#ifdef RTLD_START
RTLD_START
#else
diff --git a/posix/unistd.h b/posix/unistd.h
index 92e874ed5e..0c4ddccb20 100644
--- a/posix/unistd.h
+++ b/posix/unistd.h
@@ -620,6 +620,13 @@ extern long int gethostid __P ((void));
extern int sethostid __P ((long int __id));
+/* Get and set the NIS (aka YP) domain name, if any.
+ Called just like `gethostname' and `sethostname'.
+ The NIS domain name is usually the empty string when not using NIS. */
+extern int getdomainname __P ((char *__name, size_t __len));
+extern int setdomainname __P ((__const char *__name, size_t __len));
+
+
/* Return the number of bytes in a page. This is the system's page size,
which is not necessarily the same as the hardware page size. */
extern size_t __getpagesize __P ((void));
diff --git a/sysdeps/i386/dl-machine.h b/sysdeps/i386/dl-machine.h
index 406133861d..50e928ce3a 100644
--- a/sysdeps/i386/dl-machine.h
+++ b/sysdeps/i386/dl-machine.h
@@ -79,49 +79,56 @@ elf_machine_rel (struct link_map *map,
int noplt))
{
Elf32_Addr *const reloc_addr = (void *) (map->l_addr + reloc->r_offset);
- Elf32_Addr loadbase, undo;
- weak_symbol (_dl_rtld_map); /* Defined in rtld.c, but not in libc.a. */
+ Elf32_Addr loadbase;
+
+#ifdef RTLD_BOOTSTRAP
+#define RESOLVE(noplt) map->l_addr
+#else
+#define RESOLVE(noplt) (*resolve) (&sym, (Elf32_Addr) reloc_addr, noplt)
+#endif
switch (ELF32_R_TYPE (reloc->r_info))
{
case R_386_COPY:
- loadbase = (*resolve) (&sym, (Elf32_Addr) reloc_addr, 0);
+ loadbase = RESOLVE (0);
memcpy (reloc_addr, (void *) (loadbase + sym->st_value), sym->st_size);
break;
case R_386_GLOB_DAT:
- loadbase = (resolve ? (*resolve) (&sym, (Elf32_Addr) reloc_addr, 0) :
- /* RESOLVE is null during bootstrap relocation. */
- map->l_addr);
+ loadbase = RESOLVE (0);
*reloc_addr = sym ? (loadbase + sym->st_value) : 0;
break;
case R_386_JMP_SLOT:
- loadbase = (resolve ? (*resolve) (&sym, (Elf32_Addr) reloc_addr, 1) :
- /* RESOLVE is null during bootstrap relocation. */
- map->l_addr);
+ loadbase = RESOLVE (1);
*reloc_addr = sym ? (loadbase + sym->st_value) : 0;
break;
case R_386_32:
- if (resolve && map == &_dl_rtld_map)
- /* Undo the relocation done here during bootstrapping. Now we will
- relocate it anew, possibly using a binding found in the user
- program or a loaded library rather than the dynamic linker's
- built-in definitions used while loading those libraries. */
- undo = map->l_addr + sym->st_value;
- else
- undo = 0;
- loadbase = (resolve ? (*resolve) (&sym, (Elf32_Addr) reloc_addr, 0) :
- /* RESOLVE is null during bootstrap relocation. */
- map->l_addr);
- *reloc_addr += (sym ? (loadbase + sym->st_value) : 0) - undo;
- break;
+ {
+ Elf32_Addr undo = 0;
+#ifndef RTLD_BOOTSTRAP
+ /* This is defined in rtld.c, but nowhere in the static libc.a;
+ make the reference weak so static programs can still link. This
+ declaration cannot be done when compiling rtld.c (i.e. #ifdef
+ RTLD_BOOTSTRAP) because rtld.c contains the common defn for
+ _dl_rtld_map, which is incompatible with a weak decl in the same
+ file. */
+ weak_symbol (_dl_rtld_map);
+ if (map == &_dl_rtld_map)
+ /* Undo the relocation done here during bootstrapping. Now we will
+ relocate it anew, possibly using a binding found in the user
+ program or a loaded library rather than the dynamic linker's
+ built-in definitions used while loading those libraries. */
+ undo = map->l_addr + sym->st_value;
+#endif
+ loadbase = RESOLVE (0);
+ *reloc_addr += (sym ? (loadbase + sym->st_value) : 0) - undo;
+ break;
+ }
case R_386_RELATIVE:
if (!resolve || map != &_dl_rtld_map) /* Already done in rtld itself. */
*reloc_addr += map->l_addr;
break;
case R_386_PC32:
- loadbase = (resolve ? (*resolve) (&sym, (Elf32_Addr) reloc_addr, 0) :
- /* RESOLVE is null during bootstrap relocation. */
- map->l_addr);
+ loadbase = RESOLVE (0);
*reloc_addr += ((sym ? (loadbase + sym->st_value) : 0) -
(Elf32_Addr) reloc_addr);
break;
@@ -131,6 +138,8 @@ elf_machine_rel (struct link_map *map,
assert (! "unexpected dynamic reloc type");
break;
}
+
+#undef RESOLVE
}
static inline void