Squashed 'yocto-poky/' content from commit ea562de
git-subtree-dir: yocto-poky
git-subtree-split: ea562de57590c966cd5a75fda8defecd397e6436
diff --git a/scripts/relocate_sdk.py b/scripts/relocate_sdk.py
new file mode 100755
index 0000000..992db5c
--- /dev/null
+++ b/scripts/relocate_sdk.py
@@ -0,0 +1,254 @@
+#!/usr/bin/env python
+#
+# Copyright (c) 2012 Intel Corporation
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+#
+# This program 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 General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+#
+# DESCRIPTION
+# This script is called by the SDK installer script. It replaces the dynamic
+# loader path in all binaries and also fixes the SYSDIR paths/lengths and the
+# location of ld.so.cache in the dynamic loader binary
+#
+# AUTHORS
+# Laurentiu Palcu <laurentiu.palcu@intel.com>
+#
+
+import struct
+import sys
+import stat
+import os
+import re
+import errno
+
+if sys.version < '3':
+ def b(x):
+ return x
+else:
+ def b(x):
+ return x.encode(sys.getfilesystemencoding())
+
+old_prefix = re.compile(b("##DEFAULT_INSTALL_DIR##"))
+
+def get_arch():
+ f.seek(0)
+ e_ident =f.read(16)
+ ei_mag0,ei_mag1_3,ei_class = struct.unpack("<B3sB11x", e_ident)
+
+ if (ei_mag0 != 0x7f and ei_mag1_3 != "ELF") or ei_class == 0:
+ return 0
+
+ if ei_class == 1:
+ return 32
+ elif ei_class == 2:
+ return 64
+
+def parse_elf_header():
+ global e_type, e_machine, e_version, e_entry, e_phoff, e_shoff, e_flags,\
+ e_ehsize, e_phentsize, e_phnum, e_shentsize, e_shnum, e_shstrndx
+
+ f.seek(0)
+ elf_header = f.read(64)
+
+ if arch == 32:
+ # 32bit
+ hdr_fmt = "<HHILLLIHHHHHH"
+ hdr_size = 52
+ else:
+ # 64bit
+ hdr_fmt = "<HHIQQQIHHHHHH"
+ hdr_size = 64
+
+ e_type, e_machine, e_version, e_entry, e_phoff, e_shoff, e_flags,\
+ e_ehsize, e_phentsize, e_phnum, e_shentsize, e_shnum, e_shstrndx =\
+ struct.unpack(hdr_fmt, elf_header[16:hdr_size])
+
+def change_interpreter(elf_file_name):
+ if arch == 32:
+ ph_fmt = "<IIIIIIII"
+ else:
+ ph_fmt = "<IIQQQQQQ"
+
+ """ look for PT_INTERP section """
+ for i in range(0,e_phnum):
+ f.seek(e_phoff + i * e_phentsize)
+ ph_hdr = f.read(e_phentsize)
+ if arch == 32:
+ # 32bit
+ p_type, p_offset, p_vaddr, p_paddr, p_filesz,\
+ p_memsz, p_flags, p_align = struct.unpack(ph_fmt, ph_hdr)
+ else:
+ # 64bit
+ p_type, p_flags, p_offset, p_vaddr, p_paddr, \
+ p_filesz, p_memsz, p_align = struct.unpack(ph_fmt, ph_hdr)
+
+ """ change interpreter """
+ if p_type == 3:
+ # PT_INTERP section
+ f.seek(p_offset)
+ # External SDKs with mixed pre-compiled binaries should not get
+ # relocated so look for some variant of /lib
+ fname = f.read(11)
+ if fname.startswith(b("/lib/")) or fname.startswith(b("/lib64/")) or \
+ fname.startswith(b("/lib32/")) or fname.startswith(b("/usr/lib32/")) or \
+ fname.startswith(b("/usr/lib32/")) or fname.startswith(b("/usr/lib64/")):
+ break
+ if (len(new_dl_path) >= p_filesz):
+ print("ERROR: could not relocate %s, interp size = %i and %i is needed." \
+ % (elf_file_name, p_memsz, len(new_dl_path) + 1))
+ break
+ dl_path = new_dl_path + b("\0") * (p_filesz - len(new_dl_path))
+ f.seek(p_offset)
+ f.write(dl_path)
+ break
+
+def change_dl_sysdirs():
+ if arch == 32:
+ sh_fmt = "<IIIIIIIIII"
+ else:
+ sh_fmt = "<IIQQQQIIQQ"
+
+ """ read section string table """
+ f.seek(e_shoff + e_shstrndx * e_shentsize)
+ sh_hdr = f.read(e_shentsize)
+ if arch == 32:
+ sh_offset, sh_size = struct.unpack("<16xII16x", sh_hdr)
+ else:
+ sh_offset, sh_size = struct.unpack("<24xQQ24x", sh_hdr)
+
+ f.seek(sh_offset)
+ sh_strtab = f.read(sh_size)
+
+ sysdirs = sysdirs_len = ""
+
+ """ change ld.so.cache path and default libs path for dynamic loader """
+ for i in range(0,e_shnum):
+ f.seek(e_shoff + i * e_shentsize)
+ sh_hdr = f.read(e_shentsize)
+
+ sh_name, sh_type, sh_flags, sh_addr, sh_offset, sh_size, sh_link,\
+ sh_info, sh_addralign, sh_entsize = struct.unpack(sh_fmt, sh_hdr)
+
+ name = sh_strtab[sh_name:sh_strtab.find(b("\0"), sh_name)]
+
+ """ look only into SHT_PROGBITS sections """
+ if sh_type == 1:
+ f.seek(sh_offset)
+ """ default library paths cannot be changed on the fly because """
+ """ the string lengths have to be changed too. """
+ if name == b(".sysdirs"):
+ sysdirs = f.read(sh_size)
+ sysdirs_off = sh_offset
+ sysdirs_sect_size = sh_size
+ elif name == b(".sysdirslen"):
+ sysdirslen = f.read(sh_size)
+ sysdirslen_off = sh_offset
+ elif name == b(".ldsocache"):
+ ldsocache_path = f.read(sh_size)
+ new_ldsocache_path = old_prefix.sub(new_prefix, ldsocache_path)
+ # pad with zeros
+ new_ldsocache_path += b("\0") * (sh_size - len(new_ldsocache_path))
+ # write it back
+ f.seek(sh_offset)
+ f.write(new_ldsocache_path)
+ elif name == b(".gccrelocprefix"):
+ offset = 0
+ while (offset + 4096) <= sh_size:
+ path = f.read(4096)
+ new_path = old_prefix.sub(new_prefix, path)
+ # pad with zeros
+ new_path += b("\0") * (4096 - len(new_path))
+ #print "Changing %s to %s at %s" % (str(path), str(new_path), str(offset))
+ # write it back
+ f.seek(sh_offset + offset)
+ f.write(new_path)
+ offset = offset + 4096
+ if sysdirs != "" and sysdirslen != "":
+ paths = sysdirs.split(b("\0"))
+ sysdirs = b("")
+ sysdirslen = b("")
+ for path in paths:
+ """ exit the loop when we encounter first empty string """
+ if path == b(""):
+ break
+
+ new_path = old_prefix.sub(new_prefix, path)
+ sysdirs += new_path + b("\0")
+
+ if arch == 32:
+ sysdirslen += struct.pack("<L", len(new_path))
+ else:
+ sysdirslen += struct.pack("<Q", len(new_path))
+
+ """ pad with zeros """
+ sysdirs += b("\0") * (sysdirs_sect_size - len(sysdirs))
+
+ """ write the sections back """
+ f.seek(sysdirs_off)
+ f.write(sysdirs)
+ f.seek(sysdirslen_off)
+ f.write(sysdirslen)
+
+# MAIN
+if len(sys.argv) < 4:
+ sys.exit(-1)
+
+# In python > 3, strings may also contain Unicode characters. So, convert
+# them to bytes
+if sys.version_info < (3,):
+ new_prefix = sys.argv[1]
+ new_dl_path = sys.argv[2]
+else:
+ new_prefix = sys.argv[1].encode()
+ new_dl_path = sys.argv[2].encode()
+
+executables_list = sys.argv[3:]
+
+for e in executables_list:
+ perms = os.stat(e)[stat.ST_MODE]
+ if os.access(e, os.W_OK|os.R_OK):
+ perms = None
+ else:
+ os.chmod(e, perms|stat.S_IRWXU)
+
+ try:
+ f = open(e, "r+b")
+ except IOError:
+ exctype, ioex = sys.exc_info()[:2]
+ if ioex.errno == errno.ETXTBSY:
+ print("Could not open %s. File used by another process.\nPlease "\
+ "make sure you exit all processes that might use any SDK "\
+ "binaries." % e)
+ else:
+ print("Could not open %s: %s(%d)" % (e, ioex.strerror, ioex.errno))
+ sys.exit(-1)
+
+ # Save old size and do a size check at the end. Just a safety measure.
+ old_size = os.path.getsize(e)
+ if old_size >= 64:
+ arch = get_arch()
+ if arch:
+ parse_elf_header()
+ change_interpreter(e)
+ change_dl_sysdirs()
+
+ """ change permissions back """
+ if perms:
+ os.chmod(e, perms)
+
+ f.close()
+
+ if old_size != os.path.getsize(e):
+ print("New file size for %s is different. Looks like a relocation error!", e)
+ sys.exit(-1)
+