c88ffc239e
Commit 384ca55174 from 2007 added this to
nss/XXX-lookup.c:
+#ifndef NO_COMPAT
+int
+internal_function attribute_compat_text_section
+DB_COMPAT_FCT (service_user **ni, const char *fct_name, void **fctp)
+{
+ return DB_LOOKUP_FCT (ni, fct_name, NULL, fctp);
+}
+#endif
That is, it adds a pseudo-compat function with an internal_function
attribute. The function it was supposed to replace did not have the
attribute:
extern int DB_LOOKUP_FCT (service_user **ni, const char *fct_name,
- void **fctp) internal_function;
+ const char *fct2_name, void **fctp)
+ internal_function;
This changed the calling convention on i386 for the following
functions in the public ABI:
__nss_passwd_lookup
__nss_group_lookup
__nss_hosts_lookup
This commit replaces the functions with always-failing stubs,
with true compat symbols. Due to a happy accident, the calling
convention of the stub is identical for the internal_function
and non-internal_function case on i386.
In addition, this commit auto-generates the __nss_*_lookup2
function declarations as part of <nsswitch.h>.
43 lines
1.7 KiB
C
43 lines
1.7 KiB
C
/* Compatibility stubs of accidentally exported __nss_*_lookup functions.
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Copyright (C) 2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C 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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The GNU C 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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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <shlib-compat.h>
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#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_27)
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# include <errno.h>
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# include <nsswitch.h>
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/* On i386, the function calling convention changed from the standard
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ABI calling convention to three register parameters in glibc 2.8.
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The following error-returning stub happens to be compatible with
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glibc 2.7 and earlier and glibc 2.8 and later, even on i386. */
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int
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attribute_compat_text_section
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__nss_passwd_lookup (service_user **ni, const char *fct_name, void **fctp)
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{
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__set_errno (ENOSYS);
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return -1;
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}
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compat_symbol (libc, __nss_passwd_lookup, __nss_passwd_lookup, GLIBC_2_0);
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strong_alias (__nss_passwd_lookup, __nss_group_lookup)
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compat_symbol (libc, __nss_group_lookup, __nss_group_lookup, GLIBC_2_0);
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strong_alias (__nss_passwd_lookup, __nss_hosts_lookup)
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compat_symbol (libc, __nss_hosts_lookup, __nss_hosts_lookup, GLIBC_2_0);
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#endif /* SHLIB_COMPAT */
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