
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>
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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)