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2757e91c2b
The script expects each of the symbols that it looks for to
be in one of three sections, which in nm(1) are described as
follows:
T - The symbol is in the text (code) section.
B - The symbol is in the BSS data section. This section
typically contains zero-initialized or uninitialized
data, although the exact behavior is system dependent.
D - The symbol is in the initialized data section.
When building on alpha, however, some of the symbols show up
in one of two additional sections, specifically:
S - The symbol is in an uninitialized or zero-initialized
data section for small objects.
G - The symbol is in an initialized data section for small
objects.
In other words, S is the same as B and G is the same as D,
except with some optimization for small objects that for some
reason is applied on alpha but not on other architectures.
I have confirmed that, for all the symbols that the script
complained about being missing on alpha, the section is the
expected one, that is, symbols that are reported as B on x86
are reported as S on alpha, and symbols that are reported as
D on x86 are reported as G on alpha.
Note that, while the B section doesn't seem to be used at all
on alpha, at least in our case, the D section still is.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
79 lines
2.0 KiB
Python
Executable File
79 lines
2.0 KiB
Python
Executable File
#!/usr/bin/env python3
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#
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# Copyright (C) 2012-2019 Red Hat, Inc.
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#
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library. If not, see
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# <http://www.gnu.org/licenses/>.
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import re
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import subprocess
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import sys
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if len(sys.argv) < 3:
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print("syntax: %s SYMFILE ELFLIB(S)" % sys.argv[0], file=sys.stderr)
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symfile = sys.argv[1]
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elflibs = sys.argv[2:]
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wantsyms = {}
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gotsyms = {}
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ret = 0
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with open(symfile, "r") as fh:
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for line in fh:
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line = line.strip()
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if "{" in line:
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continue
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if "}" in line:
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continue
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if line in ["global:", "local:"]:
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continue
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if line == "":
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continue
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if line[0] == '#':
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continue
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if "*" in line:
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continue
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line = line.strip(";")
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if line in wantsyms:
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print("Symbol %s is listed twice" % line, file=sys.stderr)
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ret = 1
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else:
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wantsyms[line] = True
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for elflib in elflibs:
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nm = subprocess.Popen(["nm", elflib], shell=False,
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stdout=subprocess.PIPE).stdout
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for line in nm:
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line = line.decode("utf-8")
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symmatch = re.search(r'''^\S+\s(?:[TBSDG])\s(\S+)\s*$''', line)
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if symmatch is None:
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continue
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gotsyms[symmatch.group(1)] = True
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for sym in wantsyms.keys():
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if sym in gotsyms:
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continue
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print("Expected symbol '%s' is not in ELF library" % sym, file=sys.stderr)
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ret = 1
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sys.exit(ret)
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