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<bits/glibc-syscalls.h>: only regenerate when we have new uapi headers.

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Test: update_all.py
Change-Id: Iaa92dce263197f5a0e7d2dce5e00a31372dcb3e9
This commit is contained in:
Elliott Hughes 2019-04-11 14:09:30 -07:00
parent d1ff49c24a
commit c4c2e24d5f
3 changed files with 65 additions and 76 deletions
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18
libc/include/bits/glibc-syscalls.h
View file

@ -1,6 +1,5 @@
/* Generated by gensyscalls.py. Do not edit. */
#ifndef _BIONIC_BITS_GLIBC_SYSCALLS_H_
#define _BIONIC_BITS_GLIBC_SYSCALLS_H_
/* Generated file. Do not edit. */
#pragma once
#if defined(__NR__llseek)
#define SYS__llseek __NR__llseek
#endif
@ -61,12 +60,6 @@
#if defined(__NR_brk)
#define SYS_brk __NR_brk
#endif
#if defined(__NR_cachectl)
#define SYS_cachectl __NR_cachectl
#endif
#if defined(__NR_cacheflush)
#define SYS_cacheflush __NR_cacheflush
#endif
#if defined(__NR_capget)
#define SYS_capget __NR_capget
#endif
@ -1123,9 +1116,6 @@
#if defined(__NR_syslog)
#define SYS_syslog __NR_syslog
#endif
#if defined(__NR_sysmips)
#define SYS_sysmips __NR_sysmips
#endif
#if defined(__NR_tee)
#define SYS_tee __NR_tee
#endif
@ -1150,9 +1140,6 @@
#if defined(__NR_timer_settime)
#define SYS_timer_settime __NR_timer_settime
#endif
#if defined(__NR_timerfd)
#define SYS_timerfd __NR_timerfd
#endif
#if defined(__NR_timerfd_create)
#define SYS_timerfd_create __NR_timerfd_create
#endif
@ -1255,4 +1242,3 @@
#if defined(__NR_writev)
#define SYS_writev __NR_writev
#endif
#endif /* _BIONIC_BITS_GLIBC_SYSCALLS_H_ */

67
libc/kernel/tools/update_all.py
View file

@ -4,7 +4,7 @@ import sys, cpp, kernel, glob, os, re, getopt, clean_header, subprocess, shutil
from defaults import *
from utils import *
def usage():
def Usage():
print """\
usage: %(progname)s [kernel-original-path] [kernel-modified-path]
@ -24,7 +24,7 @@ def usage():
""" % { "progname" : os.path.basename(sys.argv[0]) }
sys.exit(0)
def processFiles(updater, original_dir, modified_dir, src_rel_dir, update_rel_dir):
def ProcessFiles(updater, original_dir, modified_dir, src_rel_dir, update_rel_dir):
# Delete the old headers before updating to the new headers.
update_dir = os.path.join(get_kernel_dir(), update_rel_dir)
shutil.rmtree(update_dir)
@ -64,15 +64,64 @@ def processFiles(updater, original_dir, modified_dir, src_rel_dir, update_rel_di
update_path = os.path.join(update_rel_dir, rel_path)
print "cleaning %s -> %s (%s)" % (src_str, update_path, state)
# This lets us support regular system calls like __NR_write and also weird
# ones like __ARM_NR_cacheflush, where the NR doesn't come at the start.
def make__NR_name(name):
if name.startswith('__ARM_NR_'):
return name
else:
return '__NR_%s' % (name)
# Scan Linux kernel asm/unistd.h files containing __NR_* constants
# and write out equivalent SYS_* constants for glibc source compatibility.
def GenerateGlibcSyscallsHeader(updater):
libc_root = '%s/bionic/libc/' % os.environ['ANDROID_BUILD_TOP']
# Collect the set of all syscalls for all architectures.
syscalls = set()
pattern = re.compile(r'^\s*#\s*define\s*__NR_([a-z_]\S+)')
for unistd_h in ['kernel/uapi/asm-generic/unistd.h',
'kernel/uapi/asm-arm/asm/unistd.h',
'kernel/uapi/asm-arm/asm/unistd-common.h',
'kernel/uapi/asm-arm/asm/unistd-eabi.h',
'kernel/uapi/asm-arm/asm/unistd-oabi.h',
'kernel/uapi/asm-x86/asm/unistd_32.h',
'kernel/uapi/asm-x86/asm/unistd_64.h',
'kernel/uapi/asm-x86/asm/unistd_x32.h']:
for line in open(os.path.join(libc_root, unistd_h)):
m = re.search(pattern, line)
if m:
nr_name = m.group(1)
if 'reserved' not in nr_name and 'unused' not in nr_name:
syscalls.add(nr_name)
# Create a single file listing them all.
# Note that the input files include #if trickery, so even for a single
# architecture we don't know exactly which ones are available.
# https://b.corp.google.com/issues/37110151
content = '/* Generated file. Do not edit. */\n'
content += '#pragma once\n'
for syscall in sorted(syscalls):
nr_name = make__NR_name(syscall)
content += '#if defined(%s)\n' % nr_name
content += ' #define SYS_%s %s\n' % (syscall, nr_name)
content += '#endif\n'
updater.editFile('%s/include/bits/glibc-syscalls.h' % libc_root, content)
try:
optlist, args = getopt.getopt(sys.argv[1:], '')
except:
# Unrecognized option
sys.stderr.write("error: unrecognized option\n")
usage()
Usage()
if len(optlist) > 0 or len(args) > 2:
usage()
Usage()
if len(args) > 0:
original_dir = args[0]
@ -91,10 +140,16 @@ if not os.path.isdir(modified_dir):
panic("The kernel modified directory %s is not a directory\n" % modified_dir)
updater = BatchFileUpdater()
# Process the original uapi headers first.
processFiles(updater, original_dir, modified_dir, "uapi", "uapi"),
ProcessFiles(updater, original_dir, modified_dir, "uapi", "uapi"),
# Now process the special files.
processFiles(updater, original_dir, modified_dir, "scsi", os.path.join("android", "scsi", "scsi"))
ProcessFiles(updater, original_dir, modified_dir, "scsi", os.path.join("android", "scsi", "scsi"))
updater.updateGitFiles()
# Now re-generate the <bits/glibc-syscalls.h> from the new uapi headers.
updater = BatchFileUpdater()
GenerateGlibcSyscallsHeader(updater)
updater.updateGitFiles()

56
libc/tools/gensyscalls.py
View file

@ -527,7 +527,6 @@ class State:
def __init__(self):
self.old_stubs = []
self.new_stubs = []
self.other_files = []
self.syscalls = []
@ -565,56 +564,6 @@ class State:
syscall["asm-x86_64"] = add_footer(64, x86_64_genstub(syscall), syscall)
# Scan Linux kernel asm/unistd.h files containing __NR_* constants
# and write out equivalent SYS_* constants for glibc source compatibility.
def gen_glibc_syscalls_h(self):
glibc_syscalls_h_path = "include/bits/glibc-syscalls.h"
logging.info("generating " + glibc_syscalls_h_path)
glibc_fp = create_file(glibc_syscalls_h_path)
glibc_fp.write("/* %s */\n" % warning)
glibc_fp.write("#ifndef _BIONIC_BITS_GLIBC_SYSCALLS_H_\n")
glibc_fp.write("#define _BIONIC_BITS_GLIBC_SYSCALLS_H_\n")
# Collect the set of all syscalls for all architectures.
syscalls = set()
pattern = re.compile(r'^\s*#\s*define\s*__NR_([a-z_]\S+)')
for unistd_h in ["kernel/uapi/asm-generic/unistd.h",
"kernel/uapi/asm-arm/asm/unistd.h",
"kernel/uapi/asm-arm/asm/unistd-common.h",
"kernel/uapi/asm-arm/asm/unistd-eabi.h",
"kernel/uapi/asm-arm/asm/unistd-oabi.h",
"kernel/uapi/asm-mips/asm/unistd.h",
"kernel/uapi/asm-mips/asm/unistd_n32.h",
"kernel/uapi/asm-mips/asm/unistd_n64.h",
"kernel/uapi/asm-mips/asm/unistd_nr_n32.h",
"kernel/uapi/asm-mips/asm/unistd_nr_n64.h",
"kernel/uapi/asm-mips/asm/unistd_nr_o32.h",
"kernel/uapi/asm-mips/asm/unistd_o32.h",
"kernel/uapi/asm-x86/asm/unistd_32.h",
"kernel/uapi/asm-x86/asm/unistd_64.h",
"kernel/uapi/asm-x86/asm/unistd_x32.h"]:
for line in open(os.path.join(bionic_libc_root, unistd_h)):
m = re.search(pattern, line)
if m:
nr_name = m.group(1)
if 'reserved' not in nr_name and 'unused' not in nr_name:
syscalls.add(nr_name)
# Write out a single file listing them all. Note that the input
# files include #if trickery, so even for a single architecture
# we don't know exactly which ones are available.
# https://code.google.com/p/android/issues/detail?id=215853
for syscall in sorted(syscalls):
nr_name = make__NR_name(syscall)
glibc_fp.write("#if defined(%s)\n" % nr_name)
glibc_fp.write(" #define SYS_%s %s\n" % (syscall, nr_name))
glibc_fp.write("#endif\n")
glibc_fp.write("#endif /* _BIONIC_BITS_GLIBC_SYSCALLS_H_ */\n")
glibc_fp.close()
self.other_files.append(glibc_syscalls_h_path)
# Write each syscall stub.
def gen_syscall_stubs(self):
for syscall in self.syscalls:
@ -645,16 +594,15 @@ class State:
logging.info("creating %s..." % bionic_temp)
make_dir(bionic_temp)
logging.info("re-generating stubs and support files...")
logging.info("re-generating stubs...")
self.gen_glibc_syscalls_h()
self.gen_syscall_stubs()
logging.info("comparing files...")
adds = []
edits = []
for stub in self.new_stubs + self.other_files:
for stub in self.new_stubs:
tmp_file = os.path.join(bionic_temp, stub)
libc_file = os.path.join(bionic_libc_root, stub)
if not os.path.exists(libc_file):