diff options
| -rw-r--r-- | ChangeLog | 12 | ||||
| -rw-r--r-- | elf/dl-runtime.c | 21 | ||||
| -rw-r--r-- | sysdeps/x86_64/dl-runtime.c | 9 | ||||
| -rw-r--r-- | sysdeps/x86_64/dl-trampoline.S | 12 |
4 files changed, 33 insertions, 21 deletions
@@ -1,5 +1,17 @@ 2009-03-14 Ulrich Drepper <drepper@redhat.com> + * elf/dl-runtime.c (reloc_offset): Define. + (reloc_index): Define. + (_dl_fixup): Rename reloc_offset parameter to reloc_arg. + (_dl_fixup_profile): Likewise. Use reloc_index instead of + computing index from reloc_offset. + (_dl_call_pltexit): Likewise. + * sysdeps/x86_64/dl-trampoline.S (_dl_runtime_resolve): Just pass + the relocation index to _dl_fixup. + (_dl_runtime_profile): Likewise for _dl_fixup_profile and + _dl_call_pltexit. + * sysdeps/x86_64/dl-runtime.c: New file. + [BZ #9893] * sysdeps/x86_64/dl-trampoline.S (_dl_runtime_profile): Fix alignement of La_x86_64_regs. Store xmm parameters. diff --git a/elf/dl-runtime.c b/elf/dl-runtime.c index 962f47de64..93c8f29d39 100644 --- a/elf/dl-runtime.c +++ b/elf/dl-runtime.c @@ -1,5 +1,5 @@ /* On-demand PLT fixup for shared objects. - Copyright (C) 1995-2006, 2007, 2008 Free Software Foundation, Inc. + Copyright (C) 1995-2006, 2007, 2008, 2009 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -46,6 +46,12 @@ # define ARCH_FIXUP_ATTRIBUTE #endif +#ifndef reloc_offset +# define reloc_offset reloc_arg +# define reloc_index reloc_arg / sizeof (PLTREL) +#endif + + /* This function is called through a special trampoline from the PLT the first time each PLT entry is called. We must perform the relocation @@ -63,7 +69,7 @@ _dl_fixup ( # endif /* GKM FIXME: Fix trampoline to pass bounds so we can do without the `__unbounded' qualifier. */ - struct link_map *__unbounded l, ElfW(Word) reloc_offset) + struct link_map *__unbounded l, ElfW(Word) reloc_arg) { const ElfW(Sym) *const symtab = (const void *) D_PTR (l, l_info[DT_SYMTAB]); @@ -142,22 +148,20 @@ _dl_fixup ( #endif #if !defined PROF && !defined ELF_MACHINE_NO_PLT && !__BOUNDED_POINTERS__ - DL_FIXUP_VALUE_TYPE __attribute ((noinline)) ARCH_FIXUP_ATTRIBUTE _dl_profile_fixup ( #ifdef ELF_MACHINE_RUNTIME_FIXUP_ARGS ELF_MACHINE_RUNTIME_FIXUP_ARGS, #endif - struct link_map *l, ElfW(Word) reloc_offset, + struct link_map *l, ElfW(Word) reloc_arg, ElfW(Addr) retaddr, void *regs, long int *framesizep) { void (*mcount_fct) (ElfW(Addr), ElfW(Addr)) = INTUSE(_dl_mcount); /* This is the address in the array where we store the result of previous relocations. */ - struct reloc_result *reloc_result - = &l->l_reloc_result[reloc_offset / sizeof (PLTREL)]; + struct reloc_result *reloc_result = &l->l_reloc_result[reloc_index]; DL_FIXUP_VALUE_TYPE *resultp = &reloc_result->addr; DL_FIXUP_VALUE_TYPE value = *resultp; @@ -415,7 +419,7 @@ _dl_profile_fixup ( #include <stdio.h> void ARCH_FIXUP_ATTRIBUTE -_dl_call_pltexit (struct link_map *l, ElfW(Word) reloc_offset, +_dl_call_pltexit (struct link_map *l, ElfW(Word) reloc_arg, const void *inregs, void *outregs) { #ifdef SHARED @@ -423,8 +427,7 @@ _dl_call_pltexit (struct link_map *l, ElfW(Word) reloc_offset, relocations. */ // XXX Maybe the bound information must be stored on the stack since // XXX with bind_not a new value could have been stored in the meantime. - struct reloc_result *reloc_result - = &l->l_reloc_result[reloc_offset / sizeof (PLTREL)]; + struct reloc_result *reloc_result = &l->l_reloc_result[reloc_index]; ElfW(Sym) *defsym = ((ElfW(Sym) *) D_PTR (reloc_result->bound, l_info[DT_SYMTAB]) + reloc_result->boundndx); diff --git a/sysdeps/x86_64/dl-runtime.c b/sysdeps/x86_64/dl-runtime.c new file mode 100644 index 0000000000..b625d1e882 --- /dev/null +++ b/sysdeps/x86_64/dl-runtime.c @@ -0,0 +1,9 @@ +/* The ABI calls for the PLT stubs to pass the index of the relocation + and not its offset. In _dl_profile_fixup and _dl_call_pltexit we + also use the index. Therefore it is wasteful to compute the offset + in the trampoline just to reverse the operation immediately + afterwards. */ +#define reloc_offset reloc_arg * sizeof (PLTREL) +#define reloc_index reloc_arg + +#include <elf/dl-runtime.c> diff --git a/sysdeps/x86_64/dl-trampoline.S b/sysdeps/x86_64/dl-trampoline.S index c9be759e37..0ae47a47db 100644 --- a/sysdeps/x86_64/dl-trampoline.S +++ b/sysdeps/x86_64/dl-trampoline.S @@ -35,10 +35,6 @@ _dl_runtime_resolve: movq %r8, 40(%rsp) movq %r9, 48(%rsp) movq 64(%rsp), %rsi # Copy args pushed by PLT in register. - movq %rsi, %r11 # Multiply by 24 - addq %r11, %rsi - addq %r11, %rsi - shlq $3, %rsi movq 56(%rsp), %rdi # %rdi: link_map, %rsi: reloc_offset call _dl_fixup # Call resolver. movq %rax, %r11 # Save return value @@ -116,10 +112,6 @@ _dl_runtime_profile: movq %rsp, %rcx # La_x86_64_regs pointer to %rcx. movq 48(%rbx), %rdx # Load return address if needed. movq 40(%rbx), %rsi # Copy args pushed by PLT in register. - movq %rsi,%r11 # Multiply by 24. - addq %r11,%rsi - addq %r11,%rsi - shlq $3, %rsi movq 32(%rbx), %rdi # %rdi: link_map, %rsi: reloc_offset leaq 16(%rbx), %r8 call _dl_profile_fixup # Call resolver. @@ -204,10 +196,6 @@ _dl_runtime_profile: movq 24(%rbx), %rdx # La_x86_64_regs argument to %rdx. movq 40(%rbx), %rsi # Copy args pushed by PLT in register. - movq %rsi,%r11 # Multiply by 24. - addq %r11,%rsi - addq %r11,%rsi - shlq $3, %rsi movq 32(%rbx), %rdi # %rdi: link_map, %rsi: reloc_offset call _dl_call_pltexit |