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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 /sysdeps/i386/dl-machine.h
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.
Diffstat (limited to 'sysdeps/i386/dl-machine.h')
-rw-r--r--sysdeps/i386/dl-machine.h59
1 files changed, 34 insertions, 25 deletions
diff --git a/sysdeps/i386/dl-machine.h b/sysdeps/i386/dl-machine.h
index 4061338..50e928c 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