X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=libc-abis;h=8668e49d8863cd2ad77aa0f1b0df0de5a1d46505;hb=27dae0113e527aa2a94350d1f624c6e7c81139ce;hp=a66a9ec3a458c7aa5068acb60c7e31c2623c983f;hpb=1dbb4edc731763ddf362c2fbfc13850e5f9267e2;p=platform%2Fupstream%2Fglibc.git

diff --git a/libc-abis b/libc-abis
index a66a9ec..8668e49 100644
--- a/libc-abis
+++ b/libc-abis
@@ -1,16 +1,48 @@
-# See the copy of this file in libc for detailed explanations.  The
-# ports copy needs to include all libc definitions applicable to any
-# ports target; only one copy will be used.
+# Definition of features which introduce new libc ABI versions.  This
+# file is used to create a header file with definitions for the various
+# versions.  The static linker will encode in the EI_ABIVERSION field in
+# the e_ident array in the ELF program header the required ABI version.
+# This is not a bitmask.  The maximum ABI version required must be
+# encoded.
+#
+# Adding new features should always happen by appending new lines.  Never
+# add entries in the middle or where they seem "logical".  Once a version
+# is assigned to a feature it must not change again.  Since some features
+# are conditionally added this can only ever be done securely without much
+# risk is by adding at the end.
+#
+# The following lines have one of two formats:
+#
+#	SYMBOL
+# With just a symbol on the line this is the name of a feature which
+# is architecture independent.
+#
+#	SYMBOL	PLATFORM
+# Using this form architecture (and platform) dependent features can be
+# specified.  The PLATFORM name can use the wildcards available in
+# the Bourne shell's case expression.
+#
+# Note that the same symbol can be used using different platform triples.
+# They don't have to be in the same order relative to other entries.  This
+# can happen if the feature is implemented for different architectures
+# at different times.
+#
+# This file is parsed by a script which produces a header file containing
+# a single enum definition.  An extra symbol is added as entry zero to
+# specify the default ABI with number 0 and an artificial last entry is
+# added to allow computing the maximum ABI version for the platform.
 #
 # Feature Name	Configuration
 # ------------	-------------
 #
-# MIPS PLTs.
-MIPS_PLT	mips*-*-linux*
-#
 # Unique symbol definitions for C++.
 # Architecture independent, all ELF targets (== all targets)
 UNIQUE
 #
 # Indirect PLT relocations.  Architecture dependent.
+IFUNC		x86_64-*-linux*
+IFUNC		i?86-*-linux*
+IFUNC		powerpc64-*-linux*
 IFUNC		powerpc-*-linux*
+IFUNC		sparc64-*-linux*
+IFUNC		sparc-*-linux*