(CFLAGS-tst-align.c): Add -mpreferred-stack-boundary=4.

1 files changed, 125 insertions, 30 deletions

diff --git a/sysdeps/i386/dl-machine.h b/sysdeps/i386/dl-machine.h
index df3edf5460..c48d9d325e 100644
--- a/sysdeps/i386/dl-machine.h
+++ b/sysdeps/i386/dl-machine.h
@@ -1,5 +1,5 @@
 /* Machine-dependent ELF dynamic relocation inline functions.  i386 version.
-   Copyright (C) 1995-2002, 2003, 2004, 2005 Free Software Foundation, Inc.
+   Copyright (C) 1995-2002, 2003, 2004 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
@@ -129,8 +129,7 @@ elf_machine_runtime_setup (struct link_map *l, int lazy, int profile)
 	{
 	  got[2] = (Elf32_Addr) &_dl_runtime_profile;
 
-	  if (GLRO(dl_profile) != NULL
-	      && _dl_name_match_p (GLRO(dl_profile), l))
+	  if (_dl_name_match_p (GLRO(dl_profile), l))
 	    /* This is the object we are looking for.  Say that we really
 	       want profiling and the timers are started.  */
 	    GL(dl_profile_map) = l;
@@ -155,18 +154,112 @@ elf_machine_runtime_setup (struct link_map *l, int lazy, int profile)
    destroys the passed register information.  */
 /* GKM FIXME: Fix trampoline to pass bounds so we can do
    without the `__unbounded' qualifier.  */
-#define ARCH_FIXUP_ATTRIBUTE __attribute__ ((regparm (3), stdcall, unused))
+#define ARCH_FIXUP_ATTRIBUTE __attribute__ ((regparm (3), unused))
 
-extern ElfW(Addr) _dl_fixup (struct link_map *__unbounded l,
-			     ElfW(Word) reloc_offset)
+static ElfW(Addr) fixup (struct link_map *__unbounded l,
+			 ElfW(Word) reloc_offset)
      ARCH_FIXUP_ATTRIBUTE;
-extern ElfW(Addr) _dl_profile_fixup (struct link_map *l,
-				     ElfW(Word) reloc_offset,
-				     ElfW(Addr) retaddr, void *regs,
-				     long int *framesizep)
+static ElfW(Addr) profile_fixup (struct link_map *l, ElfW(Word) reloc_offset,
+				 ElfW(Addr) retaddr)
      ARCH_FIXUP_ATTRIBUTE;
 # endif
 
+/* This code is used in dl-runtime.c to call the `fixup' function
+   and then redirect to the address it returns.  */
+# if !defined PROF && !__BOUNDED_POINTERS__
+#  define ELF_MACHINE_RUNTIME_TRAMPOLINE asm ("\
+	.text\n\
+	.globl _dl_runtime_resolve\n\
+	.type _dl_runtime_resolve, @function\n\
+	" CFI_STARTPROC "\n\
+	.align 16\n\
+_dl_runtime_resolve:\n\
+	" CFI_ADJUST_CFA_OFFSET (8) "\n\
+	pushl %eax		# Preserve registers otherwise clobbered.\n\
+	" CFI_ADJUST_CFA_OFFSET (4) "\n\
+	pushl %ecx\n\
+	" CFI_ADJUST_CFA_OFFSET (4) "\n\
+	pushl %edx\n\
+	" CFI_ADJUST_CFA_OFFSET (4) "\n\
+	movl 16(%esp), %edx	# Copy args pushed by PLT in register.  Note\n\
+	movl 12(%esp), %eax	# that `fixup' takes its parameters in regs.\n\
+	call fixup		# Call resolver.\n\
+	popl %edx		# Get register content back.\n\
+	" CFI_ADJUST_CFA_OFFSET (-4) "\n\
+	popl %ecx\n\
+	" CFI_ADJUST_CFA_OFFSET (-4) "\n\
+	xchgl %eax, (%esp)	# Get %eax contents end store function address.\n\
+	ret $8			# Jump to function address.\n\
+	" CFI_ENDPROC "\n\
+	.size _dl_runtime_resolve, .-_dl_runtime_resolve\n\
+\n\
+	.globl _dl_runtime_profile\n\
+	.type _dl_runtime_profile, @function\n\
+	" CFI_STARTPROC "\n\
+	.align 16\n\
+_dl_runtime_profile:\n\
+	" CFI_ADJUST_CFA_OFFSET (8) "\n\
+	pushl %eax		# Preserve registers otherwise clobbered.\n\
+	" CFI_ADJUST_CFA_OFFSET (4) "\n\
+	pushl %ecx\n\
+	" CFI_ADJUST_CFA_OFFSET (4) "\n\
+	pushl %edx\n\
+	" CFI_ADJUST_CFA_OFFSET (4) "\n\
+	movl 20(%esp), %ecx	# Load return address\n\
+	movl 16(%esp), %edx	# Copy args pushed by PLT in register.  Note\n\
+	movl 12(%esp), %eax	# that `fixup' takes its parameters in regs.\n\
+	call profile_fixup	# Call resolver.\n\
+	popl %edx		# Get register content back.\n\
+	" CFI_ADJUST_CFA_OFFSET (-4) "\n\
+	popl %ecx\n\
+	" CFI_ADJUST_CFA_OFFSET (-4) "\n\
+	xchgl %eax, (%esp)	# Get %eax contents end store function address.\n\
+	ret $8			# Jump to function address.\n\
+	" CFI_ENDPROC "\n\
+	.size _dl_runtime_profile, .-_dl_runtime_profile\n\
+	.previous\n\
+");
+# else
+#  define ELF_MACHINE_RUNTIME_TRAMPOLINE asm ("\n\
+	.text\n\
+	.globl _dl_runtime_resolve\n\
+	.globl _dl_runtime_profile\n\
+	.type _dl_runtime_resolve, @function\n\
+	.type _dl_runtime_profile, @function\n\
+	" CFI_STARTPROC "\n\
+	.align 16\n\
+_dl_runtime_resolve:\n\
+_dl_runtime_profile:\n\
+	" CFI_ADJUST_CFA_OFFSET (8) "\n\
+	pushl %eax		# Preserve registers otherwise clobbered.\n\
+	" CFI_ADJUST_CFA_OFFSET (4) "\n\
+	pushl %ecx\n\
+	" CFI_ADJUST_CFA_OFFSET (4) "\n\
+	pushl %edx\n\
+	" CFI_ADJUST_CFA_OFFSET (4) "\n\
+	movl 16(%esp), %edx	# Push the arguments for `fixup'\n\
+	movl 12(%esp), %eax\n\
+	pushl %edx\n\
+	" CFI_ADJUST_CFA_OFFSET (4) "\n\
+	pushl %eax\n\
+	" CFI_ADJUST_CFA_OFFSET (4) "\n\
+	call fixup		# Call resolver.\n\
+	popl %edx		# Pop the parameters\n\
+	" CFI_ADJUST_CFA_OFFSET (-4) "\n\
+	popl %ecx\n\
+	" CFI_ADJUST_CFA_OFFSET (-4) "\n\
+	popl %edx		# Get register content back.\n\
+	" CFI_ADJUST_CFA_OFFSET (-4) "\n\
+	popl %ecx\n\
+	" CFI_ADJUST_CFA_OFFSET (-4) "\n\
+	xchgl %eax, (%esp)	# Get %eax contents end store function address.\n\
+	ret $8			# Jump to function address.\n\
+	" CFI_ENDPROC "\n\
+	.size _dl_runtime_resolve, .-_dl_runtime_resolve\n\
+	.size _dl_runtime_profile, .-_dl_runtime_profile\n\
+	.previous\n\
+");
+# endif
 #endif
 
 /* Mask identifying addresses reserved for the user program,
@@ -215,21 +308,11 @@ _dl_start_user:\n\
 	movl _rtld_local@GOTOFF(%ebx), %eax\n\
 	leal 8(%esp,%edx,4), %esi\n\
 	leal 4(%esp), %ecx\n\
-	movl %esp, %ebp\n\
-	# Make sure _dl_init is run with 16 byte aligned stack.\n\
-	andl $-16, %esp\n\
-	pushl %eax\n\
-	pushl %eax\n\
-	pushl %ebp\n\
 	pushl %esi\n\
-	# Clear %ebp, so that even constructors have terminated backchain.\n\
-	xorl %ebp, %ebp\n\
 	# Call the function to run the initializers.\n\
 	call _dl_init_internal@PLT\n\
 	# Pass our finalizer function to the user in %edx, as per ELF ABI.\n\
 	leal _dl_fini@GOTOFF(%ebx), %edx\n\
-	# Restore %esp _start expects.\n\
-	movl (%esp), %esp\n\
 	# Jump to the user's entry point.\n\
 	jmp *%edi\n\
 	.previous\n\
@@ -292,18 +375,15 @@ elf_machine_plt_value (struct link_map *map, const Elf32_Rel *reloc,
   return value;
 }
 
-
-/* Names of the architecture-specific auditing callback functions.  */
-#define ARCH_LA_PLTENTER i86_gnu_pltenter
-#define ARCH_LA_PLTEXIT i86_gnu_pltexit
-
 #endif /* !dl_machine_h */
 
+#ifdef RESOLVE
+
 /* The i386 never uses Elf32_Rela relocations for the dynamic linker.
    Prelinked libraries may use Elf32_Rela though.  */
-#define ELF_MACHINE_NO_RELA defined RTLD_BOOTSTRAP
-
-#ifdef RESOLVE_MAP
+#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.  */
@@ -342,8 +422,17 @@ elf_machine_rel (struct link_map *map, const Elf32_Rel *reloc,
 #endif	/* !RTLD_BOOTSTRAP and have no -z combreloc */
     {
       const Elf32_Sym *const refsym = sym;
+#if defined USE_TLS && !defined RTLD_BOOTSTRAP
       struct link_map *sym_map = RESOLVE_MAP (&sym, version, r_type);
-      Elf32_Addr value = sym_map == NULL ? 0 : sym_map->l_addr + sym->st_value;
+      Elf32_Addr value = sym == NULL ? 0 : sym_map->l_addr + sym->st_value;
+#else
+      Elf32_Addr value = RESOLVE (&sym, version, r_type);
+
+# ifndef RTLD_BOOTSTRAP
+      if (sym != NULL)
+# endif
+	value += sym->st_value;
+#endif	/* use TLS and !RTLD_BOOTSTRAP */
 
       switch (r_type)
 	{
@@ -460,8 +549,14 @@ elf_machine_rela (struct link_map *map, const Elf32_Rela *reloc,
 # ifndef RESOLVE_CONFLICT_FIND_MAP
       const Elf32_Sym *const refsym = sym;
 # endif
+# ifdef USE_TLS
       struct link_map *sym_map = RESOLVE_MAP (&sym, version, r_type);
       Elf32_Addr value = sym == NULL ? 0 : sym_map->l_addr + sym->st_value;
+# else
+      Elf32_Addr value = RESOLVE (&sym, version, r_type);
+      if (sym != NULL)
+	value += sym->st_value;
+# endif
 
       switch (ELF32_R_TYPE (reloc->r_info))
 	{
@@ -597,4 +692,4 @@ elf_machine_lazy_rela (struct link_map *map,
 
 #endif	/* !RTLD_BOOTSTRAP */
 
-#endif /* RESOLVE_MAP */
+#endif /* RESOLVE */