d12c332018
This changes the scripts so that if some kernel files exists in external/kernel-headers/modified, that they will be preferred over the same files found in original. This is to support the case where the kernel headers cannot be taken without some small modifications. Included with this change, is a general cleanup of the python scripts. This also modifies the generate uapi headers script to indicate if the source of the modified headers has changed. Change-Id: Id13523b244ced52a2ecd9f1399c43996dd8296fa
147 lines
4.7 KiB
Python
147 lines
4.7 KiB
Python
# this module contains all the defaults used by the generation of cleaned-up headers
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# for the Bionic C library
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#
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import time, os, sys
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from utils import *
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# the list of supported architectures
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kernel_archs = [ 'arm', 'arm64', 'mips', 'x86' ]
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# the list of include directories that belong to the kernel
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# tree. used when looking for sources...
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kernel_dirs = [ "linux", "asm", "asm-generic", "mtd" ]
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# a special value that is used to indicate that a given macro is known to be
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# undefined during optimization
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kCppUndefinedMacro = "<<<undefined>>>"
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# this is the set of known macros we want to totally optimize out from the
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# final headers
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kernel_known_macros = {
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"__KERNEL__": kCppUndefinedMacro,
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"__KERNEL_STRICT_NAMES":"1",
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"__CHECKER__": kCppUndefinedMacro,
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"__CHECK_ENDIAN__": kCppUndefinedMacro,
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"CONFIG_64BIT": "__LP64__",
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"CONFIG_X86_32": "__i386__",
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"__EXPORTED_HEADERS__": "1",
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}
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# define to true if you want to remove all defined(CONFIG_FOO) tests
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# from the clean headers. testing shows that this is not strictly necessary
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# but just generates cleaner results
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kernel_remove_config_macros = True
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# maps an architecture to a set of default macros that would be provided by
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# toolchain preprocessor
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kernel_default_arch_macros = {
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"arm": {"__ARMEB__": kCppUndefinedMacro, "__ARM_EABI__": "1"},
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"arm64": {},
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"mips": {"__MIPSEB__": kCppUndefinedMacro,
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"__MIPSEL__": "1",
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"CONFIG_32BIT": "_ABIO32",
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"CONFIG_CPU_LITTLE_ENDIAN": "1",
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"__SANE_USERSPACE_TYPES__": "1",},
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"x86": {},
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}
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kernel_arch_token_replacements = {
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"arm": {},
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"arm64": {},
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"mips": {"off_t":"__kernel_off_t"},
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"x86": {},
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}
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# Replace tokens in the output according to this mapping
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kernel_token_replacements = {
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"asm": "__asm__",
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# The kernel usage of __unused for unused struct fields conflicts with the macro defined in <sys/cdefs.h>.
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"__unused": "__linux_unused",
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# The kernel's _NSIG/NSIG are one less than the userspace value, so we need to move them aside.
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"_NSIG": "_KERNEL__NSIG",
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"NSIG": "_KERNEL_NSIG",
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# The kernel's SIGRTMIN/SIGRTMAX are absolute limits; userspace steals a few.
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"SIGRTMIN": "__SIGRTMIN",
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"SIGRTMAX": "__SIGRTMAX",
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}
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# this is the set of known static inline functions that we want to keep
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# in the final ARM headers. this is only used to keep optimized byteswapping
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# static functions and stuff like that.
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# TODO: this isn't working!
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kernel_known_arm_statics = set(
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[ "___arch__swab32", # asm-arm/byteorder.h
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]
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)
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kernel_known_arm64_statics = set(
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[
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]
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)
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kernel_known_mips_statics = set(
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[
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]
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)
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kernel_known_x86_statics = set(
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[ "___arch__swab32", # asm-x86/byteorder.h
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"___arch__swab64", # asm-x86/byteorder.h
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]
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)
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kernel_known_generic_statics = set(
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[
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"ipt_get_target", # uapi/linux/netfilter_ipv4/ip_tables.h
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"ip6t_get_target", # uapi/linux/netfilter_ipv6/ip6_tables.h
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]
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)
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# this maps an architecture to the set of static inline functions that
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# we want to keep in the final headers
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#
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kernel_known_statics = {
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"arm" : kernel_known_arm_statics,
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"arm64" : kernel_known_arm64_statics,
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"mips" : kernel_known_mips_statics,
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"x86" : kernel_known_x86_statics,
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}
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# this is a list of macros which we want to specifically exclude from
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# the generated files.
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#
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kernel_ignored_macros = set(
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[
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]
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)
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# this is the standard disclaimer
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#
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kernel_disclaimer = """\
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/****************************************************************************
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****************************************************************************
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***
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*** This header was automatically generated from a Linux kernel header
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*** of the same name, to make information necessary for userspace to
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*** call into the kernel available to libc. It contains only constants,
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*** structures, and macros generated from the original header, and thus,
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*** contains no copyrightable information.
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***
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*** To edit the content of this header, modify the corresponding
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*** source file (e.g. under external/kernel-headers/original/) then
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*** run bionic/libc/kernel/tools/update_all.py
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***
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*** Any manual change here will be lost the next time this script will
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*** be run. You've been warned!
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***
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****************************************************************************
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****************************************************************************/
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"""
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# This is the warning line that will be inserted every N-th line in the output
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kernel_warning = """\
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/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
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"""
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