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authorRoland McGrath <roland@gnu.org>1996-07-28 23:43:36 +0000
committerRoland McGrath <roland@gnu.org>1996-07-28 23:43:36 +0000
commit40fa2c8c2f031aef8463ae219ed6929f90fa1d46 (patch)
treeee5ce2e545056332bd008c94c9d4508343eb853f /sysdeps
parentcd4e176cbf567ded6c23284289be1f431792005f (diff)
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Sun Jul 28 19:26:40 1996 David S. Miller <dm@neteng.engr.sgi.com>
* sysdeps/mips/dl-machine.h (ELF_MACHINE_RUNTIME_TRAMPOLINE): Declare _dl_runtime_resolve with __attribute__ ((unused)) so the compiler doesn't elide it. (elf_machine_rel): Follow Jul 14 change in sysdeps/i386/dl-machine.h.
Diffstat (limited to 'sysdeps')
-rw-r--r--sysdeps/mips/dl-machine.h120
1 files changed, 64 insertions, 56 deletions
diff --git a/sysdeps/mips/dl-machine.h b/sysdeps/mips/dl-machine.h
index 822d9ab..50e9f64 100644
--- a/sysdeps/mips/dl-machine.h
+++ b/sysdeps/mips/dl-machine.h
@@ -67,14 +67,13 @@ elf_mips_got_from_gpreg (ElfW(Addr) gpreg)
/* FIXME: the offset of gp from GOT may be system-dependent. */
return (ElfW(Addr) *) (gpreg - 0x7ff0);
}
-
/* Return the run-time address of the _GLOBAL_OFFSET_TABLE_.
Must be inlined in a function which uses global data. */
static inline ElfW(Addr) *
elf_machine_got (void)
{
- register ElfW(Addr) gpreg asm ("$28");
- return elf_mips_got_from_gpreg (gpreg);
+ register ElfW(Addr) gp asm ("$28");
+ return (ElfW(Addr) *) (gp - 0x7ff0);
}
@@ -93,56 +92,6 @@ elf_machine_load_address (void)
return addr;
}
-/* Perform the relocation specified by RELOC and SYM (which is fully resolved).
- MAP is the object containing the reloc. */
-
-static inline void
-elf_machine_rel (struct link_map *map,
- const ElfW(Rel) *reloc, const ElfW(Sym) *sym,
- ElfW(Addr) (*resolve) (const ElfW(Sym) **ref,
- ElfW(Addr) reloc_addr,
- int noplt))
-{
- ElfW(Addr) *const reloc_addr = (void *) (map->l_addr + reloc->r_offset);
- ElfW(Addr) loadbase, undo;
-
- switch (ELFW(R_TYPE) (reloc->r_info))
- {
- case R_MIPS_REL32:
- if (ELFW(ST_BIND) (sym->st_info) == STB_LOCAL
- && (ELFW(ST_TYPE) (sym->st_info) == STT_SECTION
- || ELFW(ST_TYPE) (sym->st_info) == STT_NOTYPE))
- *reloc_addr += map->l_addr;
- else
- {
- 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, (ElfW(Addr)) reloc_addr, 0) :
- /* RESOLVE is null during bootstrap relocation. */
- map->l_addr);
- *reloc_addr += (sym ? (loadbase + sym->st_value) : 0) - undo;
- }
- break;
- case R_MIPS_NONE: /* Alright, Wilbur. */
- break;
- default:
- assert (! "unexpected dynamic reloc type");
- break;
- }
-}
-
-static inline void
-elf_machine_lazy_rel (struct link_map *map, const ElfW(Rel) *reloc)
-{
- /* Do nothing. */
-}
-
/* The MSB of got[1] of a gnu object is set to identify gnu objects. */
#define ELF_MIPS_GNU_GOT1_MASK 0x80000000
@@ -159,7 +108,7 @@ elf_machine_got_rel (struct link_map *map)
ElfW(Addr) resolve (const ElfW(Sym) *sym)
{
- ElfW(Sym) *ref = sym;
+ const ElfW(Sym) *ref = sym;
ElfW(Addr) sym_loadaddr;
sym_loadaddr = _dl_lookup_symbol (strtab + sym->st_name, &ref, scope,
map->l_name, 0, 1);
@@ -304,6 +253,10 @@ elf_machine_runtime_link_map (ElfW(Addr) gpreg)
to usual c arguments. */
#define ELF_MACHINE_RUNTIME_TRAMPOLINE \
+/* This is called from assembly stubs below which the compiler can't see. */ \
+static ElfW(Addr) __dl_runtime_resolve (ElfW(Word), ElfW(Word), ElfW(Addr)) \
+ __attribute__ ((unused)); \
+\
static ElfW(Addr) \
__dl_runtime_resolve (ElfW(Word) sym_index,\
ElfW(Word) return_address,\
@@ -387,8 +340,6 @@ _dl_runtime_resolve:\n\
where the dynamic linker should not map anything. */
#define ELF_MACHINE_USER_ADDRESS_MASK 0x00000000UL
-
-
/* Initial entry point code for the dynamic linker.
The C function `_dl_start' is the real entry point;
its return value is the user program's entry point. */
@@ -464,3 +415,60 @@ _dl_start_user:\n\
.end _start\n\
");
+#ifdef RESOLVE
+
+/* Perform the relocation specified by RELOC and SYM (which is fully resolved).
+ MAP is the object containing the reloc. */
+
+static inline void
+elf_machine_rel (struct link_map *map,
+ const ElfW(Rel) *reloc, const ElfW(Sym) *sym)
+{
+ ElfW(Addr) *const reloc_addr = (void *) (map->l_addr + reloc->r_offset);
+ ElfW(Addr) loadbase, undo;
+
+ switch (ELFW(R_TYPE) (reloc->r_info))
+ {
+ case R_MIPS_REL32:
+ if (ELFW(ST_BIND) (sym->st_info) == STB_LOCAL
+ && (ELFW(ST_TYPE) (sym->st_info) == STT_SECTION
+ || ELFW(ST_TYPE) (sym->st_info) == STT_NOTYPE))
+ *reloc_addr += map->l_addr;
+ else
+ {
+#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_extern (_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;
+ else
+#endif
+ undo = 0;
+ loadbase = RESOLVE (&sym, (ElfW(Addr)) reloc_addr, 0);
+ *reloc_addr += (sym ? (loadbase + sym->st_value) : 0) - undo;
+ }
+ break;
+ case R_MIPS_NONE: /* Alright, Wilbur. */
+ break;
+ default:
+ assert (! "unexpected dynamic reloc type");
+ break;
+ }
+}
+
+static inline void
+elf_machine_lazy_rel (struct link_map *map, const ElfW(Rel) *reloc)
+{
+ /* Do nothing. */
+}
+
+#endif /* RESOLVE */