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authorUlrich Drepper <drepper@redhat.com>2001-12-12 00:21:26 +0000
committerUlrich Drepper <drepper@redhat.com>2001-12-12 00:21:26 +0000
commit32e6df3621edc5067dfd6e87a387e1751f67f708 (patch)
tree957300a92ed16417fb46ce240d19f965fe773181 /sysdeps/i386/dl-machine.h
parent4be601a15e63d03adf55c48c19dda2d2e7377d8a (diff)
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Update.
2001-12-11 Jakub Jelinek <jakub@redhat.com> * elf/Makefile (dl-routines): Add conflict. (rtld-ldscript-in, rtld-ldscript, rtld-parms): Remove. (ld.so): Add _begin local symbol. * elf/elf.h (DT_VALTAGIDX, DT_VALNUM, DT_ADDRTAGIDX, DT_ADDRNUM): Define. * elf/dl-deps.c (_dl_build_local_scope): New. (_dl_map_object_deps): If LD_TRACE_PRELINKING, compute local scopes of all libraries. * elf/do-rel.h (VALIDX): Define. (elf_dynamic_do_rel): If ELF_MACHINE_PLT_REL is defined, don't do lazy binding for RELA. If DT_GNU_PRELINKED, DT_RELACOUNT relocations can be skipped. * elf/dl-conflict.c: New file. * elf/dl-lookup.c (_dl_debug_bindings): New. (_dl_lookup_symbol): Use _dl_debug_bindings. Reference_name is always non-NULL. (_dl_lookup_symbol_skip): Likewise. (_dl_lookup_versioned_symbol): Likewise. (_dl_lookup_versioned_symbol_skip): Likewise. * elf/dl-runtime.c (PLTREL): If ELF_MACHINE_PLT_REL is defined, define to ElfW(Rel). * elf/dynamic-link.h (elf_get_dynamic_info): Record selected dynamic tags in the DT_VALRNGLO..DT_VALRNGHI and DT_ADDRRNGLO..DT_ADDRRNGHI ranges. Don't adjust address dynamic tags if l_addr is 0. * elf/rtld.c (_dl_trace_prelink, _dl_trace_prelink_map): New variables. (_dl_start): Skip ELF_DYNAMIC_RELOCATE if ld.so is prelinked. (VALIDX, ADDRIDX): Define. (_dl_start_final): Initialize _dl_rtld_map's l_map_start and l_map_end. (dl_main): Print library list for LD_TRACE_PRELINKING. If prelinking information can be used, skip relocating libraries and call _dl_resolve_conflicts instead. (process_envvars): Handle LD_TRACE_PRELINKING envvar. * elf/dl-load.c (_dl_map_object): Don't create fake libs if LD_TRACE_PRELINKING. * include/link.h (struct link_map) [l_info]: Add DT_VALNUM + DT_ADDRNUM. * sysdeps/generic/ldsodefs.h (_dl_trace_prelink_map): New declaration. (DL_DEBUG_PRELINK): Define. (_dl_resolve_conflicts): Add prototype. * sysdeps/alpha/dl-machine.h (elf_machine_runtime_setup): Reinitialize .plt for prelinked libraries where prelinking info cannot be used. (elf_machine_rela): If relocating R_ALPHA_JMP_SLOT in .gnu.conflict section, use RESOLVE_CONFLICT_FIND_MAP to find out reloc's link_map. * sysdeps/arm/bits/link.h: New file. * sysdeps/arm/dl-machine.h (elf_machine_runtime_setup): Save original content of .got[1]. (ELF_MACHINE_NO_RELA): Only define if RTLD_BOOTSTRAP. (ELF_MACHINE_PLT_REL): Define. (elf_machine_rela, elf_machine_rela_relative): New. (elf_machine_lazy_rel): Reinitialize R_ARM_JUMP_SLOT address instead of adjusting it if prelinked and prelinking cannot be used. * sysdeps/i386/bits/link.h: New file. * sysdeps/i386/dl-machine.h (elf_machine_runtime_setup): Save original content of .got[1]. (ELF_MACHINE_NO_RELA): Only define if RTLD_BOOTSTRAP. (ELF_MACHINE_PLT_REL): Define. (elf_machine_rela, elf_machine_rela_relative): New. (elf_machine_lazy_rel): Reinitialize R_386_JUMP_SLOT address instead of adjusting it if prelinked and prelinking cannot be used. * sysdeps/powerpc/dl-machine.h (elf_machine_rela): If relocating conflicts, skip finaladdr computation. Use RESOLVE_CONFLICT_FIND_MAP to find out map for R_PPC_JMP_SLOT relocs. * sysdeps/sparc/sparc32/dl-machine.h (VALIDX): Define. (OPCODE_BA): Define. (elf_machine_runtime_setup): Reinitialize .plt for prelinked libraries where prelinking info cannot be used. (sparc_fixup_plt): Renamed from elf_machine_fixup_plt. (elf_machine_fixup_plt): Call sparc_fixup_plt. (elf_machine_rela): Set value to 0 if relocating conflicts. Call sparc_fixup_plt for R_SPARC_JMP_SLOT. * sysdeps/sparc/sparc64/dl-machine.h (VALIDX): Define. (sparc64_fixup_plt): Fix a typo. (elf_machine_rela): Set value to 0 if relocating conflicts. Handle R_SPARC_JMP_SLOT relocs when relocating conflicts. (elf_machine_runtime_setup): Reinitialize .plt for prelinked libraries where prelinking info cannot be used. * sysdeps/sh/bits/link.h: New file. * sysdeps/sh/dl-machine.h (elf_machine_runtime_setup): Save original content of .got[1]. (elf_machine_lazy_rel): Reinitialize R_SH_JMP_SLOT address instead of adjusting it if prelinked and prelinking cannot be used. * sysdeps/s390/s390-32/bits/link.h: New file. * sysdeps/s390/s390-32/dl-machine.h (elf_machine_runtime_setup): Save original content of .got[1]. (elf_machine_lazy_rel): Reinitialize R_390_JMP_SLOT address instead of adjusting it if prelinked and prelinking cannot be used. * sysdeps/s390/s390-64/bits/link.h: New file. * sysdeps/s390/s390-64/dl-machine.h (elf_machine_runtime_setup): Save original content of .got[1]. (elf_machine_lazy_rel): Reinitialize R_390_JMP_SLOT address instead of adjusting it if prelinked and prelinking cannot be used. * sysdeps/x86_64/bits/link.h: New file. * sysdeps/x86_64/dl-machine.h (elf_machine_runtime_setup): Save original content of .got[1]. (elf_machine_lazy_rel): Reinitialize R_X86_64_JMP_SLOT address instead of adjusting it if prelinked and prelinking cannot be used.
Diffstat (limited to 'sysdeps/i386/dl-machine.h')
-rw-r--r--sysdeps/i386/dl-machine.h82
1 files changed, 79 insertions, 3 deletions
diff --git a/sysdeps/i386/dl-machine.h b/sysdeps/i386/dl-machine.h
index 2f7f96d487..b86f11724b 100644
--- a/sysdeps/i386/dl-machine.h
+++ b/sysdeps/i386/dl-machine.h
@@ -87,6 +87,14 @@ elf_machine_runtime_setup (struct link_map *l, int lazy, int profile)
offset into the .rel.plt section, push _GLOBAL_OFFSET_TABLE_[1],
and then jump to _GLOBAL_OFFSET_TABLE[2]. */
got = (Elf32_Addr *) D_PTR (l, l_info[DT_PLTGOT]);
+ /* If a library is prelinked but we have to relocate anyway,
+ we have to be able to undo the prelinking of .got.plt.
+ The prelinker saved us here address of .plt + 0x16. */
+ if (got[1])
+ {
+ l->l_mach.plt = got[1] + l->l_addr;
+ l->l_mach.gotplt = (Elf32_Addr) &got[3];
+ }
got[1] = (Elf32_Addr) l; /* Identify this shared object. */
/* The got[2] entry contains the address of a function which gets
@@ -258,8 +266,9 @@ _dl_start_user:\n\
/* A reloc type used for ld.so cmdline arg lookups to reject PLT entries. */
#define ELF_MACHINE_JMP_SLOT R_386_JMP_SLOT
-/* The i386 never uses Elf32_Rela relocations. */
-#define ELF_MACHINE_NO_RELA 1
+/* The i386 never uses Elf32_Rela relocations for the dynamic linker.
+ Prelinked libraries may use Elf32_Rela though. */
+#define ELF_MACHINE_PLT_REL 1
/* We define an initialization functions. This is called very early in
_dl_sysdep_start. */
@@ -295,6 +304,12 @@ elf_machine_plt_value (struct link_map *map, const Elf32_Rel *reloc,
#ifdef RESOLVE
+/* The i386 never uses Elf32_Rela relocations for the dynamic linker.
+ Prelinked libraries may use Elf32_Rela though. */
+#ifdef RTLD_BOOTSTRAP
+#define ELF_MACHINE_NO_RELA 1
+#endif
+
/* Perform the relocation specified by RELOC and SYM (which is fully resolved).
MAP is the object containing the reloc. */
@@ -378,6 +393,41 @@ elf_machine_rel (struct link_map *map, const Elf32_Rel *reloc,
}
}
+#ifndef RTLD_BOOTSTRAP
+static inline void
+elf_machine_rela (struct link_map *map, const Elf32_Rela *reloc,
+ const Elf32_Sym *sym, const struct r_found_version *version,
+ Elf32_Addr *const reloc_addr)
+{
+ if (ELF32_R_TYPE (reloc->r_info) == R_386_RELATIVE)
+ *reloc_addr = map->l_addr + reloc->r_addend;
+ else if (ELF32_R_TYPE (reloc->r_info) != R_386_NONE)
+ {
+/* const Elf32_Sym *const refsym = sym; */
+ Elf32_Addr value = RESOLVE (&sym, version, ELF32_R_TYPE (reloc->r_info));
+ if (sym)
+ value += sym->st_value;
+
+ switch (ELF32_R_TYPE (reloc->r_info))
+ {
+ case R_386_GLOB_DAT:
+ case R_386_JMP_SLOT:
+ case R_386_32:
+ *reloc_addr = value + reloc->r_addend;
+ break;
+ case R_386_PC32:
+ *reloc_addr = (value + reloc->r_addend - (Elf32_Addr) reloc_addr);
+ break;
+ default:
+ /* We add these checks in the version to relocate ld.so only
+ if we are still debugging. */
+ _dl_reloc_bad_type (map, ELFW(R_TYPE) (reloc->r_info), 0);
+ break;
+ }
+ }
+}
+#endif
+
static inline void
elf_machine_rel_relative (Elf32_Addr l_addr, const Elf32_Rel *reloc,
Elf32_Addr *const reloc_addr)
@@ -386,6 +436,15 @@ elf_machine_rel_relative (Elf32_Addr l_addr, const Elf32_Rel *reloc,
*reloc_addr += l_addr;
}
+#ifndef RTLD_BOOTSTRAP
+static inline void
+elf_machine_rela_relative (Elf32_Addr l_addr, const Elf32_Rela *reloc,
+ Elf32_Addr *const reloc_addr)
+{
+ *reloc_addr = l_addr + reloc->r_addend;
+}
+#endif
+
static inline void
elf_machine_lazy_rel (struct link_map *map,
Elf32_Addr l_addr, const Elf32_Rel *reloc)
@@ -394,9 +453,26 @@ elf_machine_lazy_rel (struct link_map *map,
const unsigned int r_type = ELF32_R_TYPE (reloc->r_info);
/* Check for unexpected PLT reloc type. */
if (__builtin_expect (r_type == R_386_JMP_SLOT, 1))
- *reloc_addr += l_addr;
+ {
+ if (__builtin_expect (map->l_mach.plt, 0) == 0)
+ *reloc_addr += l_addr;
+ else
+ *reloc_addr =
+ map->l_mach.plt
+ + (((Elf32_Addr) reloc_addr) - map->l_mach.gotplt) * 4;
+ }
else
_dl_reloc_bad_type (map, r_type, 1);
}
+#ifndef RTLD_BOOTSTRAP
+
+static inline void
+elf_machine_lazy_rela (struct link_map *map,
+ Elf32_Addr l_addr, const Elf32_Rela *reloc)
+{
+}
+
+#endif
+
#endif /* RESOLVE */