Move all files into ports/ subdirectory in preparation for merge with glibc glibc-2.16-ports-before-merge

1 files changed, 481 insertions, 0 deletions

diff --git a/ports/sysdeps/am33/dl-machine.h b/ports/sysdeps/am33/dl-machine.h
new file mode 100644
index 0000000000..52278c0a4e
--- /dev/null
+++ b/ports/sysdeps/am33/dl-machine.h
@@ -0,0 +1,481 @@
+/* Machine-dependent ELF dynamic relocation inline functions.  AM33 version.
+   Copyright (C) 1995,96,97,98,99,2000,2001, 2004, 2011
+   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
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef dl_machine_h
+#define dl_machine_h
+
+#define ELF_MACHINE_NAME "mn10300"
+
+#include <sys/param.h>
+
+/* Return nonzero iff ELF header is compatible with the running host.  */
+static inline int __attribute__ ((unused))
+elf_machine_matches_host (const Elf32_Ehdr *ehdr)
+{
+  return ehdr->e_machine == EM_MN10300;
+}
+
+
+/* Return the link-time address of _DYNAMIC.  Conveniently, this is the
+   first element of the GOT.  This must be inlined in a function which
+   uses global data.  */
+static inline Elf32_Addr __attribute__ ((unused))
+elf_machine_dynamic (void)
+{
+  register Elf32_Addr *got asm ("a2");
+  return *got;
+}
+
+
+/* Return the run-time load address of the shared object.  */
+static inline Elf32_Addr __attribute__ ((unused))
+elf_machine_load_address (void)
+{
+  register Elf32_Addr gotaddr asm ("a2");
+  Elf32_Addr off, gotval;
+
+  asm ("mov _dl_start@GOTOFF,%0" : "=r" (off));
+  asm ("mov (_dl_start@GOT,%1),%0" : "=r" (gotval) : "r" (gotaddr));
+
+  return off + gotaddr - gotval;
+}
+
+#if !defined PROF && !__BOUNDED_POINTERS__
+/* We add a declaration of this function here so that in dl-runtime.c
+   the ELF_MACHINE_RUNTIME_TRAMPOLINE macro really can pass the parameters
+   in registers.
+
+   We cannot use this scheme for profiling because the _mcount call
+   destroys the passed register information.  */
+/* GKM FIXME: Fix trampoline to pass bounds so we can do
+   without the `__unbounded' qualifier.  */
+static ElfW(Addr) fixup (struct link_map *__unbounded l, ElfW(Word) reloc_offset)
+     __attribute__ ((unused));
+static ElfW(Addr) profile_fixup (struct link_map *l, ElfW(Word) reloc_offset,
+				 ElfW(Addr) retaddr)
+     __attribute__ ((unused));
+#endif
+
+/* Set up the loaded object described by L so its unrelocated PLT
+   entries will jump to the on-demand fixup code in dl-runtime.c.  */
+
+static inline int __attribute__ ((unused))
+elf_machine_runtime_setup (struct link_map *l, int lazy, int profile)
+{
+  Elf32_Addr *got;
+  extern void _dl_runtime_resolve (Elf32_Word) attribute_hidden;
+  extern void _dl_runtime_profile (Elf32_Word) attribute_hidden;
+
+  if (l->l_info[DT_JMPREL] && lazy)
+    {
+      /* The GOT entries for functions in the PLT have not yet been filled
+	 in.  Their initial contents will arrange when called to push an
+	 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]);
+      got[1] = (Elf32_Addr) l;	/* Identify this shared object.  */
+
+      /* The got[2] entry contains the address of a function which gets
+	 called to get the address of a so far unresolved function and
+	 jump to it.  The profiling extension of the dynamic linker allows
+	 to intercept the calls to collect information.  In this case we
+	 don't store the address in the GOT so that all future calls also
+	 end in this function.  */
+      if (__builtin_expect (profile, 0))
+	{
+	  got[2] = (Elf32_Addr) &_dl_runtime_profile;
+
+	  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;
+	}
+      else
+	/* This function will get called to fix up the GOT entry indicated by
+	   the offset on the stack, and then jump to the resolved address.  */
+	got[2] = (Elf32_Addr) &_dl_runtime_resolve;
+    }
+
+  return lazy;
+}
+
+/* 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\
+_dl_runtime_resolve:\n\
+	add -12,sp		# Preserve registers otherwise clobbered.\n\
+	mov d1,(20,sp)\n\
+	mov d0,(16,sp)\n\
+	mov r1,d0\n\
+	mov r0,d1\n\
+	call fixup,[],0		# Call resolver.\n\
+	mov d0,a0\n\
+	mov (12,sp),d1		# Copy return address back to mdr,\n\
+	mov d1,mdr		# in case the callee returns with retf\n\
+	mov (16,sp),d0		# Get register content back.\n\
+	mov (20,sp),d1\n\
+	add 12,sp\n\
+	jmp (a0)\n\
+	.size _dl_runtime_resolve, .-_dl_runtime_resolve\n\
+\n\
+	.globl _dl_runtime_profile\n\
+	.type _dl_runtime_profile, @function\n\
+_dl_runtime_profile:\n\
+	add -12,sp		# Preserve registers otherwise clobbered.\n\
+	mov d1,(20,sp)\n\
+	mov d0,(16,sp)\n\
+	mov r1,d0\n\
+	mov r0,d1\n\
+	call profile_fixup,[],0		# Call resolver.\n\
+	mov d0,a0\n\
+	mov (12,sp),d1		# Copy return address back to mdr,\n\
+	mov d1,mdr		# in case the callee returns with retf\n\
+	mov (16,sp),d0		# Get register content back.\n\
+	mov (20,sp),d1\n\
+	add 12,sp\n\
+	jmp (a0)\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\
+_dl_runtime_resolve:\n\
+_dl_runtime_profile:\n\
+	add -12,sp		# Preserve registers otherwise clobbered.\n\
+	mov d1,(20,sp)\n\
+	mov d0,(16,sp)\n\
+	mov r1,d0\n\
+	mov r0,d1\n\
+	call profile_fixup,[],0		# Call resolver.\n\
+	mov d0,a0\n\
+	mov (12,sp),d1		# Copy return address back to mdr,\n\
+	mov d1,mdr		# in case the callee returns with retf\n\
+	mov (16,sp),d0		# Get register content back.\n\
+	mov (20,sp),d1\n\
+	add 12,sp\n\
+	jmp (a0)\n\
+	.size _dl_runtime_resolve, .-_dl_runtime_resolve\n\
+	.size _dl_runtime_profile, .-_dl_runtime_profile\n\
+	.previous\n\
+");
+#endif
+
+/* Mask identifying addresses reserved for the user program,
+   where the dynamic linker should not map anything.  */
+#define ELF_MACHINE_USER_ADDRESS_MASK	0xf8000000UL
+
+/* Initial entry point code for the dynamic linker.
+   The C function `_dl_start' is the real entry point;
+   its return value is the user program's entry point.  */
+#define RTLD_START asm ("\n\
+	.text\n\
+.globl _start\n\
+.globl _dl_start_user\n\
+_start:\n\
+	mov 0,a3	# Mark the top of the stack\n\
+	mov sp,a1\n\
+	add -20,sp	# Prepare for function call\n\
+	mov a1,d0\n\
+	call _dl_start,[],0\n\
+_dl_start_user:\n\
+	# Save the user entry point address in d2.\n\
+	mov d0,d2\n\
+	# Point a2 at the GOT.\n\
+0:	mov pc,a2\n\
+	add _GLOBAL_OFFSET_TABLE_ - (0b-.),a2\n\
+	# Store the highest stack address\n\
+	mov (__libc_stack_end@GOT,a2),a0\n\
+	mov a1,(a0)\n\
+	# See if we were run as a command with the executable file\n\
+	# name as an extra leading argument.\n\
+	mov (_dl_skip_args@GOT,a2),a0\n\
+	mov (a0),d0\n\
+	# Pop the original argument count.\n\
+	mov (20,sp),d3\n\
+	# Subtract _dl_skip_args from it.\n\
+	sub d0,d3\n\
+	# Adjust the stack pointer to skip _dl_skip_args words.\n\
+	asl2 d0\n\
+	mov sp,a0\n\
+	add d0,a0\n\
+	mov a0,sp\n\
+	# Push argc back on the stack.\n\
+	mov d3,(20,sp)\n\
+	# The special initializer gets called with the stack just\n\
+	# as the application's entry point will see it; it can\n\
+	# switch stacks if it moves these contents over.\n\
+" RTLD_START_SPECIAL_INIT "\n\
+	# Load the parameters again.\n\
+	# (d0, d1, (12,sp), (16,sp)) = (_dl_loaded, argc, argv, envp)\n\
+	add 24,a0\n\
+	mov a0,(12,sp)	# a0 is 24+sp\n\
+	mov d3,d1	# d3 contained argc\n\
+	inc d3\n\
+	asl2 d3		# d3 is now (argc+1)*4,\n\
+	add d3,a0	# the offset between argv and envp\n\
+	mov a0,(16,sp)\n\
+	mov (_rtld_local@GOTOFF,a2),d0\n\
+	# Call the function to run the initializers.\n\
+	call _dl_init@PLT,[],0\n\
+	# Pass our finalizer function to the user in d0, as per ELF ABI.\n\
+	mov (_dl_fini@GOT,a2),d0\n\
+	add 20,sp\n\
+	# Jump to the user's entry point.\n\
+	mov d2,a1\n\
+	jmp (a1)\n\
+	.previous\n\
+");
+
+#ifndef RTLD_START_SPECIAL_INIT
+#define RTLD_START_SPECIAL_INIT /* nothing */
+#endif
+
+/* ELF_RTYPE_CLASS_PLT iff TYPE describes relocation of a PLT entry, so
+   PLT entries should not be allowed to define the value.
+   ELF_RTYPE_CLASS_NOCOPY iff TYPE should not be allowed to resolve to one
+   of the main executable's symbols, as for a COPY reloc.  */
+#define elf_machine_type_class(type) \
+  ((((type) == R_MN10300_JMP_SLOT) * ELF_RTYPE_CLASS_PLT)	\
+   | (((type) == R_MN10300_COPY) * ELF_RTYPE_CLASS_COPY))
+
+/* A reloc type used for ld.so cmdline arg lookups to reject PLT entries.  */
+#define ELF_MACHINE_JMP_SLOT	R_MN10300_JMP_SLOT
+
+static inline Elf32_Addr
+elf_machine_fixup_plt (struct link_map *map, lookup_t t,
+		       const Elf32_Rela *reloc,
+		       Elf32_Addr *reloc_addr, Elf32_Addr value)
+{
+  return *reloc_addr = value;
+}
+
+/* Return the final value of a plt relocation.  */
+static inline Elf32_Addr
+elf_machine_plt_value (struct link_map *map, const Elf32_Rela *reloc,
+		       Elf32_Addr value)
+{
+  return value + reloc->r_addend;
+}
+
+#endif /* !dl_machine_h */
+
+#ifdef RESOLVE
+
+/* The mn10300 never uses Elf32_Rel relocations.  */
+#define ELF_MACHINE_NO_REL 1
+
+/* Perform the relocation specified by RELOC and SYM (which is fully resolved).
+   MAP is the object containing the reloc.  */
+
+static inline void
+elf_machine_rela (struct link_map *map, const Elf32_Rela *reloc,
+		  const Elf32_Sym *sym, const struct r_found_version *version,
+		  void *const reloc_addr_arg, int skip_ifunc)
+{
+  const unsigned int r_type = ELF32_R_TYPE (reloc->r_info);
+  Elf32_Addr value, *reloc_addr;
+
+  /* Make sure we drop any previous alignment assumptions.  */
+  asm ("" : "=r" (reloc_addr) : "0" (reloc_addr_arg));
+
+#define COPY_UNALIGNED_WORD(sw, tw, align) \
+  { \
+    unsigned long *__sl = (void*)&(sw), *__tl = (void*)&(tw); \
+    unsigned short *__ss = (void*)&(sw), *__ts = (void*)&(tw); \
+    unsigned char *__sc = (void*)&(sw), *__tc = (void*)&(tw); \
+    switch ((align)) \
+    { \
+    case 0: \
+      *__tl = *__sl; \
+      break; \
+    case 2: \
+      *__ts++ = *__ss++; \
+      *__ts = *__ss; \
+      break; \
+    default: \
+      *__tc++ = *__sc++; \
+      *__tc++ = *__sc++; \
+      *__tc++ = *__sc++; \
+      *__tc = *__sc; \
+      break; \
+    } \
+  }
+
+#define COPY_UNALIGNED_HALFWORD(sw, tw, align) \
+  { \
+    unsigned short *__ss = (void*)&(sw), *__ts = (void*)&(tw); \
+    unsigned char *__sc = (void*)&(sw), *__tc = (void*)&(tw); \
+    switch ((align)) \
+    { \
+    case 0: \
+      *__ts = *__ss; \
+      break; \
+    default: \
+      *__tc++ = *__sc++; \
+      *__tc = *__sc; \
+      break; \
+    } \
+  }
+
+#if !defined RTLD_BOOTSTRAP || !defined HAVE_Z_COMBRELOC
+  if (__builtin_expect (r_type == R_MN10300_RELATIVE, 0))
+    {
+# if !defined RTLD_BOOTSTRAP && !defined HAVE_Z_COMBRELOC
+      /* This is defined in rtld.c, but nowhere in the static libc.a;
+	 make the reference weak so static programs can still link.
+	 This declaration cannot be done when compiling rtld.c (i.e.
+	 #ifdef RTLD_BOOTSTRAP) because rtld.c contains the common
+	 defn for _dl_rtld_map, which is incompatible with a weak decl
+	 in the same file.  */
+      weak_extern (_dl_rtld_map);
+      if (map != &_dl_rtld_map) /* Already done in rtld itself. */
+# endif
+	{
+	  COPY_UNALIGNED_WORD (*reloc_addr, value, (int) reloc_addr & 3);
+	  value += map->l_addr;
+	  COPY_UNALIGNED_WORD (value, *reloc_addr, (int) reloc_addr & 3);
+	}
+    }
+# ifndef RTLD_BOOTSTRAP
+  else if (__builtin_expect (r_type == R_MN10300_NONE, 0))
+    return;
+# endif
+  else
+#endif
+    {
+#ifndef RTLD_BOOTSTRAP
+      const Elf32_Sym *const refsym = sym;
+#endif
+
+      value = RESOLVE (&sym, version, ELF32_R_TYPE (reloc->r_info));
+      if (sym)
+	value += sym->st_value;
+      value += reloc->r_addend;	/* Assume copy relocs have zero addend.  */
+
+      switch (r_type)
+	{
+#ifndef RTLD_BOOTSTRAP
+	case R_MN10300_COPY:
+	  if (sym == NULL)
+	    /* This can happen in trace mode if an object could not be
+	       found.  */
+	    break;
+	  if (sym->st_size > refsym->st_size
+	      || (GLRO(dl_verbose) && sym->st_size < refsym->st_size))
+	    {
+	      extern char **_dl_argv;
+	      const char *strtab;
+
+	      strtab = (const void *) D_PTR (map, l_info[DT_STRTAB]);
+	      _dl_error_printf ("\
+%s: Symbol `%s' has different size in shared object, consider re-linking\n",
+				_dl_argv[0] ?: "<program name unknown>",
+				strtab + refsym->st_name);
+	    }
+	  memcpy (reloc_addr, (void *) value, MIN (sym->st_size,
+						   refsym->st_size));
+	  break;
+#endif
+	case R_MN10300_GLOB_DAT:
+	case R_MN10300_JMP_SLOT:
+	  /* These addresses are always aligned.  */
+	  *reloc_addr = value;
+	  break;
+	case R_MN10300_32:
+	  COPY_UNALIGNED_WORD (value, *reloc_addr, (int) reloc_addr & 3);
+	  break;
+#ifndef RTLD_BOOTSTRAP
+	case R_MN10300_16:
+	  COPY_UNALIGNED_HALFWORD (value, *reloc_addr, (int) reloc_addr & 1);
+	  break;
+	case R_MN10300_8:
+	  *(char *) reloc_addr = value;
+	  break;
+	case R_MN10300_PCREL32:
+	  value -= (Elf32_Addr) reloc_addr;
+	  COPY_UNALIGNED_WORD (value, *reloc_addr, (int) reloc_addr & 3);
+	  break;
+	case R_MN10300_PCREL16:
+	  value -= (Elf32_Addr) reloc_addr;
+	  COPY_UNALIGNED_HALFWORD (value, *reloc_addr, (int) reloc_addr & 1);
+	  break;
+	case R_MN10300_PCREL8:
+	  value -= (Elf32_Addr) reloc_addr;
+	  *(char *) reloc_addr = (value - (Elf32_Addr) reloc_addr);
+	  break;
+#endif
+	case R_MN10300_NONE:		/* Alright, Wilbur.  */
+	  break;
+#if !defined RTLD_BOOTSTRAP || defined _NDEBUG
+	default:
+	  _dl_reloc_bad_type (map, ELFW(R_TYPE) (reloc->r_info), 0);
+	  break;
+#endif
+	}
+
+    }
+}
+
+static inline void
+elf_machine_rela_relative (Elf32_Addr l_addr, const Elf32_Rela *reloc,
+			   void *const reloc_addr_arg)
+{
+  Elf32_Addr value, *reloc_addr;
+
+  asm ("" : "=r" (reloc_addr) : "0" (reloc_addr_arg));
+
+  COPY_UNALIGNED_WORD (*reloc_addr, value, (int)reloc_addr & 3);
+  value += l_addr;
+  COPY_UNALIGNED_WORD (value, *reloc_addr, (int)reloc_addr & 3);
+}
+
+static inline void
+elf_machine_lazy_rel (struct link_map *map,
+		      Elf32_Addr l_addr, const Elf32_Rela *reloc,
+		      int skip_ifunc)
+{
+  unsigned long int const r_type = ELF32_R_TYPE (reloc->r_info);
+
+  /* Check for unexpected PLT reloc type.  */
+  if (__builtin_expect (r_type, R_MN10300_JMP_SLOT) == R_MN10300_JMP_SLOT)
+    {
+      Elf32_Addr* const reloc_addr = (void *)(l_addr + reloc->r_offset);
+      Elf32_Addr value;
+
+      /* Perform a RELATIVE reloc on the .got entry that transfers
+	 to the .plt.  */
+      COPY_UNALIGNED_WORD (*reloc_addr, value, (int)reloc_addr & 3);
+      value += l_addr;
+      COPY_UNALIGNED_WORD (value, *reloc_addr, (int)reloc_addr & 3);
+    }
+  else if (__builtin_expect (r_type, R_MN10300_NONE) != R_MN10300_NONE)
+    _dl_reloc_bad_type (map, ELFW(R_TYPE) (reloc->r_info), 1);
+
+}
+
+#endif /* RESOLVE */