mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-11-01 17:08:10 +00:00
5ac9efa3c5
Tidy the naming convention for compat syscall subs. Hints which describe
the purpose of the stub go in front and receive a double underscore to
denote that they are generated on-the-fly by the COMPAT_SYSCALL_DEFINEx()
macro.
For the generic case, this means:
t kernel_waitid # common C function (see kernel/exit.c)
__do_compat_sys_waitid # inlined helper doing the actual work
# (takes original parameters as declared)
T __se_compat_sys_waitid # sign-extending C function calling inlined
# helper (takes parameters of type long,
# casts them to unsigned long and then to
# the declared type)
T compat_sys_waitid # alias to __se_compat_sys_waitid()
# (taking parameters as declared), to
# be included in syscall table
For x86, the naming is as follows:
t kernel_waitid # common C function (see kernel/exit.c)
__do_compat_sys_waitid # inlined helper doing the actual work
# (takes original parameters as declared)
t __se_compat_sys_waitid # sign-extending C function calling inlined
# helper (takes parameters of type long,
# casts them to unsigned long and then to
# the declared type)
T __ia32_compat_sys_waitid # IA32_EMULATION 32-bit-ptregs -> C stub,
# calls __se_compat_sys_waitid(); to be
# included in syscall table
T __x32_compat_sys_waitid # x32 64-bit-ptregs -> C stub, calls
# __se_compat_sys_waitid(); to be included
# in syscall table
If only one of IA32_EMULATION and x32 is enabled, __se_compat_sys_waitid()
may be inlined into the stub __{ia32,x32}_compat_sys_waitid().
Suggested-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20180409105145.5364-3-linux@dominikbrodowski.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
101 lines
3.2 KiB
Python
Executable file
101 lines
3.2 KiB
Python
Executable file
#!/usr/bin/python
|
|
#
|
|
# Copyright 2004 Matt Mackall <mpm@selenic.com>
|
|
#
|
|
# inspired by perl Bloat-O-Meter (c) 1997 by Andi Kleen
|
|
#
|
|
# This software may be used and distributed according to the terms
|
|
# of the GNU General Public License, incorporated herein by reference.
|
|
|
|
import sys, os, re
|
|
from signal import signal, SIGPIPE, SIG_DFL
|
|
|
|
signal(SIGPIPE, SIG_DFL)
|
|
|
|
if len(sys.argv) < 3:
|
|
sys.stderr.write("usage: %s [option] file1 file2\n" % sys.argv[0])
|
|
sys.stderr.write("The options are:\n")
|
|
sys.stderr.write("-c categorize output based on symbol type\n")
|
|
sys.stderr.write("-d Show delta of Data Section\n")
|
|
sys.stderr.write("-t Show delta of text Section\n")
|
|
sys.exit(-1)
|
|
|
|
re_NUMBER = re.compile(r'\.[0-9]+')
|
|
|
|
def getsizes(file, format):
|
|
sym = {}
|
|
with os.popen("nm --size-sort " + file) as f:
|
|
for line in f:
|
|
size, type, name = line.split()
|
|
if type in format:
|
|
# strip generated symbols
|
|
if name.startswith("__mod_"): continue
|
|
if name.startswith("__se_sys"): continue
|
|
if name.startswith("__se_compat_sys"): continue
|
|
if name == "linux_banner": continue
|
|
# statics and some other optimizations adds random .NUMBER
|
|
name = re_NUMBER.sub('', name)
|
|
sym[name] = sym.get(name, 0) + int(size, 16)
|
|
return sym
|
|
|
|
def calc(oldfile, newfile, format):
|
|
old = getsizes(oldfile, format)
|
|
new = getsizes(newfile, format)
|
|
grow, shrink, add, remove, up, down = 0, 0, 0, 0, 0, 0
|
|
delta, common = [], {}
|
|
otot, ntot = 0, 0
|
|
|
|
for a in old:
|
|
if a in new:
|
|
common[a] = 1
|
|
|
|
for name in old:
|
|
otot += old[name]
|
|
if name not in common:
|
|
remove += 1
|
|
down += old[name]
|
|
delta.append((-old[name], name))
|
|
|
|
for name in new:
|
|
ntot += new[name]
|
|
if name not in common:
|
|
add += 1
|
|
up += new[name]
|
|
delta.append((new[name], name))
|
|
|
|
for name in common:
|
|
d = new.get(name, 0) - old.get(name, 0)
|
|
if d>0: grow, up = grow+1, up+d
|
|
if d<0: shrink, down = shrink+1, down-d
|
|
delta.append((d, name))
|
|
|
|
delta.sort()
|
|
delta.reverse()
|
|
return grow, shrink, add, remove, up, down, delta, old, new, otot, ntot
|
|
|
|
def print_result(symboltype, symbolformat, argc):
|
|
grow, shrink, add, remove, up, down, delta, old, new, otot, ntot = \
|
|
calc(sys.argv[argc - 1], sys.argv[argc], symbolformat)
|
|
|
|
print("add/remove: %s/%s grow/shrink: %s/%s up/down: %s/%s (%s)" % \
|
|
(add, remove, grow, shrink, up, -down, up-down))
|
|
print("%-40s %7s %7s %+7s" % (symboltype, "old", "new", "delta"))
|
|
for d, n in delta:
|
|
if d: print("%-40s %7s %7s %+7d" % (n, old.get(n,"-"), new.get(n,"-"), d))
|
|
|
|
if otot:
|
|
percent = (ntot - otot) * 100.0 / otot
|
|
else:
|
|
percent = 0
|
|
print("Total: Before=%d, After=%d, chg %+.2f%%" % (otot, ntot, percent))
|
|
|
|
if sys.argv[1] == "-c":
|
|
print_result("Function", "tT", 3)
|
|
print_result("Data", "dDbB", 3)
|
|
print_result("RO Data", "rR", 3)
|
|
elif sys.argv[1] == "-d":
|
|
print_result("Data", "dDbBrR", 3)
|
|
elif sys.argv[1] == "-t":
|
|
print_result("Function", "tT", 3)
|
|
else:
|
|
print_result("Function", "tTdDbBrR", 2)
|