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* sysdeps/sparc/sparc32/dl-machine.h (elf_machine_runtime_setup): No

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need to check GLRO(dl_hwcap) & HWCAP_SPARC_FLUSH on sparcv9. 
(sparc_fixup_plt): Add do_flush argument instead of figuring whether 
flush should be used or not inside of the function. 
(elf_machine_fixup_plt, elf_machine_rela): Adjust caller.
	* sysdeps/unix/sysv/linux/sparc/sparc32/clone.S (__clone,
	__thread_start): Use HIDDEN_JUMPTARGET.
	* sysdeps/unix/sysv/linux/sparc/sparc64/clone.S (__clone,
	__thread_start): Likewise.
	* sysdeps/unix/sysv/linux/sparc/sysdep.h (JUMPTARGET): Define.
nptl/
	* sysdeps/unix/sysv/linux/lowlevellock.c: Comment fix.
	* sysdeps/unix/sysv/linux/sparc/sparc32/lowlevellock.c
	(__lll_timedwait_tid): Pass LLL_SHARED as 4th argument to
	lll_futex_timed_wait.
	* sysdeps/sparc/sparc32/dl-machine.h (elf_machine_runtime_setup): No
	need to check GLRO(dl_hwcap) & HWCAP_SPARC_FLUSH on sparcv9.
	(sparc_fixup_plt): Add do_flush argument instead of figuring whether
	flush should be used or not inside of the function.
	(elf_machine_fixup_plt, elf_machine_rela): Adjust caller.

	* sysdeps/unix/sysv/linux/sparc/sparc32/clone.S (__clone,
	__thread_start): Use HIDDEN_JUMPTARGET.
	* sysdeps/unix/sysv/linux/sparc/sparc64/clone.S (__clone,
	__thread_start): Likewise.
	* sysdeps/unix/sysv/linux/sparc/sysdep.h (JUMPTARGET): Define.
This commit is contained in:
Jakub Jelinek
2007-08-14 19:59:35 +00:00
parent 702a94146a
commit 467d1345e0
8 changed files with 69 additions and 30 deletions
Download Patch File Download Diff File Expand all files Collapse all files

54
sysdeps/sparc/sparc32/dl-machine.h
View File

@ -1,5 +1,6 @@
/* Machine-dependent ELF dynamic relocation inline functions. SPARC version.
Copyright (C) 1996-2003, 2004, 2005, 2006 Free Software Foundation, Inc.
Copyright (C) 1996-2003, 2004, 2005, 2006, 2007
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
@ -155,12 +156,18 @@ elf_machine_runtime_setup (struct link_map *l, int lazy, int profile)
|| __builtin_expect (l->l_info [VALIDX (DT_GNU_LIBLISTSZ)] != NULL, 0))
{
/* Need to reinitialize .plt to undo prelinking. */
int do_flush;
Elf32_Rela *rela = (Elf32_Rela *) D_PTR (l, l_info[DT_JMPREL]);
Elf32_Rela *relaend
= (Elf32_Rela *) ((char *) rela
+ l->l_info[DT_PLTRELSZ]->d_un.d_val);
do_flush = GLRO(dl_hwcap) & HWCAP_SPARC_FLUSH;
#if !defined RTLD_BOOTSTRAP && !defined __sparc_v9__
/* Note that we don't mask the hwcap here, as the flush is
essential to functionality on those cpu's that implement it.
For sparcv9 we can assume flush is present. */
const int do_flush = GLRO(dl_hwcap) & HWCAP_SPARC_FLUSH;
#else
const int do_flush = 1;
#endif
/* prelink must ensure there are no R_SPARC_NONE relocs left
in .rela.plt. */
@ -305,20 +312,11 @@ _dl_start_user:\n\
.size _dl_start_user, . - _dl_start_user\n\
.previous");
static inline Elf32_Addr
static inline __attribute__ ((always_inline)) Elf32_Addr
sparc_fixup_plt (const Elf32_Rela *reloc, Elf32_Addr *reloc_addr,
Elf32_Addr value, int t)
Elf32_Addr value, int t, int do_flush)
{
Elf32_Sword disp = value - (Elf32_Addr) reloc_addr;
#ifndef RTLD_BOOTSTRAP
/* Note that we don't mask the hwcap here, as the flush is essential to
functionality on those cpu's that implement it. */
int do_flush = GLRO(dl_hwcap) & HWCAP_SPARC_FLUSH;
#else
/* Unfortunately, this is necessary, so that we can ensure
ld.so will not execute corrupt PLT entry instructions. */
const int do_flush = 1;
#endif
if (0 && disp >= -0x800000 && disp < 0x800000)
{
@ -354,7 +352,15 @@ elf_machine_fixup_plt (struct link_map *map, lookup_t t,
const Elf32_Rela *reloc,
Elf32_Addr *reloc_addr, Elf32_Addr value)
{
return sparc_fixup_plt (reloc, reloc_addr, value, 1);
#ifdef __sparc_v9__
/* Sparc v9 can assume flush is always present. */
const int do_flush = 1;
#else
/* Note that we don't mask the hwcap here, as the flush is essential to
functionality on those cpu's that implement it. */
const int do_flush = GLRO(dl_hwcap) & HWCAP_SPARC_FLUSH;
#endif
return sparc_fixup_plt (reloc, reloc_addr, value, 1, do_flush);
}
/* Return the final value of a plt relocation. */
@ -455,9 +461,21 @@ elf_machine_rela (struct link_map *map, const Elf32_Rela *reloc,
*reloc_addr = value;
break;
case R_SPARC_JMP_SLOT:
/* At this point we don't need to bother with thread safety,
so we can optimize the first instruction of .plt out. */
sparc_fixup_plt (reloc, reloc_addr, value, 0);
{
#if !defined RTLD_BOOTSTRAP && !defined __sparc_v9__
/* Note that we don't mask the hwcap here, as the flush is
essential to functionality on those cpu's that implement
it. For sparcv9 we can assume flush is present. */
const int do_flush = GLRO(dl_hwcap) & HWCAP_SPARC_FLUSH;
#else
/* Unfortunately, this is necessary, so that we can ensure
ld.so will not execute corrupt PLT entry instructions. */
const int do_flush = 1;
#endif
/* At this point we don't need to bother with thread safety,
so we can optimize the first instruction of .plt out. */
sparc_fixup_plt (reloc, reloc_addr, value, 0, do_flush);
}
break;
#if (!defined RTLD_BOOTSTRAP || USE___THREAD) \
&& !defined RESOLVE_CONFLICT_FIND_MAP