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
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#
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# Copyright 2004 Matt Mackall <mpm@selenic.com>
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#
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# inspired by perl Bloat-O-Meter (c) 1997 by Andi Kleen
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#
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# This software may be used and distributed according to the terms
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# of the GNU General Public License, incorporated herein by reference.
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import sys, os, re
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from signal import signal, SIGPIPE, SIG_DFL
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signal(SIGPIPE, SIG_DFL)
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if len(sys.argv) < 3:
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sys.stderr.write("usage: %s [option] file1 file2\n" % sys.argv[0])
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sys.stderr.write("The options are:\n")
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sys.stderr.write("-c categorize output based on symbol type\n")
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sys.stderr.write("-d Show delta of Data Section\n")
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sys.stderr.write("-t Show delta of text Section\n")
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sys.exit(-1)
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re_NUMBER = re.compile(r'\.[0-9]+')
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def getsizes(file, format):
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sym = {}
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with os.popen("nm --size-sort " + file) as f:
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for line in f:
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size, type, name = line.split()
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if type in format:
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# strip generated symbols
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if name.startswith("__mod_"): continue
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if name.startswith("__se_sys"): continue
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if name.startswith("__se_compat_sys"): continue
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if name == "linux_banner": continue
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# statics and some other optimizations adds random .NUMBER
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name = re_NUMBER.sub('', name)
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sym[name] = sym.get(name, 0) + int(size, 16)
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return sym
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def calc(oldfile, newfile, format):
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old = getsizes(oldfile, format)
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new = getsizes(newfile, format)
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grow, shrink, add, remove, up, down = 0, 0, 0, 0, 0, 0
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delta, common = [], {}
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otot, ntot = 0, 0
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for a in old:
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if a in new:
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common[a] = 1
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for name in old:
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otot += old[name]
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if name not in common:
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remove += 1
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down += old[name]
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delta.append((-old[name], name))
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for name in new:
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ntot += new[name]
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if name not in common:
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add += 1
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up += new[name]
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delta.append((new[name], name))
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for name in common:
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d = new.get(name, 0) - old.get(name, 0)
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if d>0: grow, up = grow+1, up+d
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if d<0: shrink, down = shrink+1, down-d
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delta.append((d, name))
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delta.sort()
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delta.reverse()
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return grow, shrink, add, remove, up, down, delta, old, new, otot, ntot
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def print_result(symboltype, symbolformat, argc):
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grow, shrink, add, remove, up, down, delta, old, new, otot, ntot = \
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calc(sys.argv[argc - 1], sys.argv[argc], symbolformat)
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print("add/remove: %s/%s grow/shrink: %s/%s up/down: %s/%s (%s)" % \
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(add, remove, grow, shrink, up, -down, up-down))
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print("%-40s %7s %7s %+7s" % (symboltype, "old", "new", "delta"))
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for d, n in delta:
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if d: print("%-40s %7s %7s %+7d" % (n, old.get(n,"-"), new.get(n,"-"), d))
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if otot:
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percent = (ntot - otot) * 100.0 / otot
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else:
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percent = 0
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print("Total: Before=%d, After=%d, chg %+.2f%%" % (otot, ntot, percent))
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if sys.argv[1] == "-c":
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print_result("Function", "tT", 3)
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print_result("Data", "dDbB", 3)
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print_result("RO Data", "rR", 3)
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elif sys.argv[1] == "-d":
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print_result("Data", "dDbBrR", 3)
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elif sys.argv[1] == "-t":
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print_result("Function", "tT", 3)
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else:
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print_result("Function", "tTdDbBrR", 2)
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