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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/alpha/dl-machine.h
parent4be601a15e63d03adf55c48c19dda2d2e7377d8a (diff)
downloadglibc-32e6df3621edc5067dfd6e87a387e1751f67f708.tar.gz
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/alpha/dl-machine.h')
-rw-r--r--sysdeps/alpha/dl-machine.h43
1 files changed, 40 insertions, 3 deletions
diff --git a/sysdeps/alpha/dl-machine.h b/sysdeps/alpha/dl-machine.h
index a039f245db..c93da661bf 100644
--- a/sysdeps/alpha/dl-machine.h
+++ b/sysdeps/alpha/dl-machine.h
@@ -122,8 +122,30 @@ elf_machine_runtime_setup (struct link_map *l, int lazy, int profile)
*(Elf64_Addr *)(plt + 24) = (Elf64_Addr) l;
/* If the first instruction of the plt entry is not
- "br $28, plt0", we cannot do lazy relocation. */
- lazy = (*(unsigned int *)(plt + 32) == 0xc39ffff7);
+ "br $28, plt0", we have to reinitialize .plt for lazy relocation. */
+ if (*(unsigned int *)(plt + 32) != 0xc39ffff7)
+ {
+ unsigned int val = 0xc39ffff7;
+ unsigned int *slot, *end;
+ const Elf64_Rela *rela = D_PTR (l, l_info[DT_JMPREL]);
+ Elf64_Addr l_addr = l->l_addr;
+
+ /* br t12,.+4; ldq t12,12(t12); nop; jmp t12,(t12),.+4 */
+ *(unsigned long *)plt = 0xa77b000cc3600000;
+ *(unsigned long *)(plt + 8) = 0x6b7b000047ff041f;
+ slot = (unsigned int *)(plt + 32);
+ end = (unsigned int *)(plt + 32
+ + l->l_info[DT_PLTRELSZ]->d_un.d_val / 2);
+ while (slot < end)
+ {
+ /* br at,.plt+0 */
+ *slot = val;
+ *(Elf64_Addr *) rela->r_offset = (Elf64_Addr) slot - l_addr;
+ val -= 3;
+ slot += 3;
+ ++rela;
+ }
+ }
}
return lazy;
@@ -520,8 +542,23 @@ elf_machine_rela (struct link_map *map,
if (r_type == R_ALPHA_GLOB_DAT)
*reloc_addr = sym_value;
- else if (r_type == R_ALPHA_JMP_SLOT)
+#ifdef RESOLVE_CONFLICT_FIND_MAP
+ /* In .gnu.conflict section, R_ALPHA_JMP_SLOT relocations have
+ R_ALPHA_JMP_SLOT in lower 8 bits and the remaining 24 bits
+ are .rela.plt index. */
+ else if ((r_type & 0xff) == R_ALPHA_JMP_SLOT)
+ {
+ /* elf_machine_fixup_plt needs the map reloc_addr points into,
+ while in _dl_resolve_conflicts map is _dl_loaded. */
+ RESOLVE_CONFLICT_FIND_MAP (map, reloc_addr);
+ reloc = ((const Elf64_Rela *) D_PTR (map, l_info[DT_JMPREL]))
+ + (r_type >> 8);
+ elf_machine_fixup_plt (map, 0, reloc, reloc_addr, sym_value);
+ }
+#else
+ else if (r_type == R_ALPHA_JMP_SLOT)
elf_machine_fixup_plt (map, 0, reloc, reloc_addr, sym_value);
+#endif
#ifndef RTLD_BOOTSTRAP
else if (r_type == R_ALPHA_REFQUAD)
{