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-rw-r--r--sysdeps/i386/dl-machine.h196
1 files changed, 97 insertions, 99 deletions
diff --git a/sysdeps/i386/dl-machine.h b/sysdeps/i386/dl-machine.h
index 7a61aaad4c..dc88b043ea 100644
--- a/sysdeps/i386/dl-machine.h
+++ b/sysdeps/i386/dl-machine.h
@@ -17,12 +17,12 @@ License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
+#ifndef dl_machine_h
+#define dl_machine_h
+
#define ELF_MACHINE_NAME "i386"
#include <assert.h>
-#include <string.h>
-#include <link.h>
-
/* Return nonzero iff E_MACHINE is compatible with the running host. */
static inline int
@@ -68,102 +68,6 @@ elf_machine_load_address (void)
++(const Elf32_Rel *) (dynamic_info)[DT_REL]->d_un.d_ptr; \
(dynamic_info)[DT_RELSZ]->d_un.d_val -= sizeof (Elf32_Rel);
-/* 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 Elf32_Rel *reloc, const Elf32_Sym *sym,
- Elf32_Addr (*resolve) (const Elf32_Sym **ref,
- Elf32_Addr reloc_addr,
- int noplt))
-{
- Elf32_Addr *const reloc_addr = (void *) (map->l_addr + reloc->r_offset);
- 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 (0);
- memcpy (reloc_addr, (void *) (loadbase + sym->st_value), sym->st_size);
- break;
- case R_386_GLOB_DAT:
- loadbase = RESOLVE (0);
- *reloc_addr = sym ? (loadbase + sym->st_value) : 0;
- break;
- case R_386_JMP_SLOT:
- loadbase = RESOLVE (1);
- *reloc_addr = sym ? (loadbase + sym->st_value) : 0;
- break;
- case R_386_32:
- {
- 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_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;
-#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 (0);
- *reloc_addr += ((sym ? (loadbase + sym->st_value) : 0) -
- (Elf32_Addr) reloc_addr);
- break;
- case R_386_NONE: /* Alright, Wilbur. */
- break;
- default:
- assert (! "unexpected dynamic reloc type");
- break;
- }
-
-#undef RESOLVE
-}
-
-static inline void
-elf_machine_lazy_rel (struct link_map *map, const Elf32_Rel *reloc)
-{
- Elf32_Addr *const reloc_addr = (void *) (map->l_addr + reloc->r_offset);
- switch (ELF32_R_TYPE (reloc->r_info))
- {
- case R_386_JMP_SLOT:
- *reloc_addr += map->l_addr;
- break;
- default:
- assert (! "unexpected PLT reloc type");
- break;
- }
-}
-
-/* Nonzero iff TYPE describes relocation of a PLT entry, so
- PLT entries should not be allowed to define the value. */
-#define elf_machine_pltrel_p(type) ((type) == R_386_JMP_SLOT)
-
-/* The i386 never uses Elf32_Rela relocations. */
-#define ELF_MACHINE_NO_RELA 1
-
/* Set up the loaded object described by L so its unrelocated PLT
entries will jump to the on-demand fixup code in dl-runtime.c. */
@@ -264,3 +168,97 @@ _dl_start_user:\n\
# Jump to the user's entry point.\n\
jmp *%edi\n\
");
+
+/* Nonzero iff TYPE describes relocation of a PLT entry, so
+ PLT entries should not be allowed to define the value. */
+#define elf_machine_pltrel_p(type) ((type) == R_386_JMP_SLOT)
+
+/* The i386 never uses Elf32_Rela relocations. */
+#define ELF_MACHINE_NO_RELA 1
+
+#endif /* !dl_machine_h */
+
+#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 Elf32_Rel *reloc, const Elf32_Sym *sym)
+{
+ Elf32_Addr *const reloc_addr = (void *) (map->l_addr + reloc->r_offset);
+ Elf32_Addr loadbase;
+
+ switch (ELF32_R_TYPE (reloc->r_info))
+ {
+ case R_386_COPY:
+ loadbase = RESOLVE (&sym, (Elf32_Addr) reloc_addr, 0);
+ memcpy (reloc_addr, (void *) (loadbase + sym->st_value), sym->st_size);
+ break;
+ case R_386_GLOB_DAT:
+ loadbase = RESOLVE (&sym, (Elf32_Addr) reloc_addr, 0);
+ *reloc_addr = sym ? (loadbase + sym->st_value) : 0;
+ break;
+ case R_386_JMP_SLOT:
+ loadbase = RESOLVE (&sym, (Elf32_Addr) reloc_addr, 1);
+ *reloc_addr = sym ? (loadbase + sym->st_value) : 0;
+ break;
+ case R_386_32:
+ {
+ 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_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;
+#endif
+ loadbase = RESOLVE (&sym, (Elf32_Addr) reloc_addr, 0);
+ *reloc_addr += (sym ? (loadbase + sym->st_value) : 0) - undo;
+ break;
+ }
+ case R_386_RELATIVE:
+#ifndef RTLD_BOOTSTRAP
+ if (map != &_dl_rtld_map) /* Already done in rtld itself. */
+#endif
+ *reloc_addr += map->l_addr;
+ break;
+ case R_386_PC32:
+ loadbase = RESOLVE (&sym, (Elf32_Addr) reloc_addr, 0);
+ *reloc_addr += ((sym ? (loadbase + sym->st_value) : 0) -
+ (Elf32_Addr) reloc_addr);
+ break;
+ case R_386_NONE: /* Alright, Wilbur. */
+ break;
+ default:
+ assert (! "unexpected dynamic reloc type");
+ break;
+ }
+
+}
+
+static inline void
+elf_machine_lazy_rel (struct link_map *map, const Elf32_Rel *reloc)
+{
+ Elf32_Addr *const reloc_addr = (void *) (map->l_addr + reloc->r_offset);
+ switch (ELF32_R_TYPE (reloc->r_info))
+ {
+ case R_386_JMP_SLOT:
+ *reloc_addr += map->l_addr;
+ break;
+ default:
+ assert (! "unexpected PLT reloc type");
+ break;
+ }
+}
+
+#endif /* RESOLVE */
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-07 21:44:57 +0000