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authorJoseph Myers <joseph@codesourcery.com>2015-06-12 22:36:38 +0000
committerJoseph Myers <joseph@codesourcery.com>2015-06-12 22:36:38 +0000
commit3164bf09f529754216eebfa66a5c32ce84eaec25 (patch)
treef6d9ea5383014ddd81ead768961b27e3868cd476 /libio
parent8737be806407be51f046b358d8824c4c968912de (diff)
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Fix syslog fputs_unlocked namespace (bug 18530).
syslog (XSI POSIX) brings in references to fputs_unlocked (not POSIX). This patch fixes this by making fputs_unlocked into a weak alias for __fputs_unlocked and using __fputs_unlocked as needed. (No linknamespace test XFAILs are removed because there are other failures from syslog as well.) Tested for x86_64 and x86 (testsuite, and comparison of disassembly of installed stripped shared libraries). Disassembly of installed stripped shared libraries is unchanged on x86_64; on x86, I see some small changes to instruction ordering and register choice, with no apparent reason for such changes to be related to this patch, but they also seem completely harmless with no change to code size. [BZ #18530] * libio/iofputs.c [!_IO_MTSAFE_IO] (__fputs_unlocked): Define as strong alias of _IO_fputs. Use libc_hidden_def. * libio/iofputs_u.c (fputs_unlocked): Rename to __fputs_unlocked and define as weak alias of __fputs_unlocked. Use libc_hidden_weak. * include/stdio.h (__fputs_unlocked): Declare. Use libc_hidden_proto. * misc/syslog.c (__vsyslog_chk): Call __fputs_unlocked instead of fputs_unlocked.
Diffstat (limited to 'libio')
-rw-r--r--libio/iofputs.c2
-rw-r--r--libio/iofputs_u.c6
2 files changed, 6 insertions, 2 deletions
diff --git a/libio/iofputs.c b/libio/iofputs.c
index 00c1cba..d1e34e4 100644
--- a/libio/iofputs.c
+++ b/libio/iofputs.c
@@ -48,6 +48,8 @@ libc_hidden_def (_IO_fputs)
weak_alias (_IO_fputs, fputs)
# ifndef _IO_MTSAFE_IO
+strong_alias (_IO_fputs, __fputs_unlocked)
+libc_hidden_def (__fputs_unlocked)
weak_alias (_IO_fputs, fputs_unlocked)
libc_hidden_ver (_IO_fputs, fputs_unlocked)
# endif
diff --git a/libio/iofputs_u.c b/libio/iofputs_u.c
index 6f79838..f823686 100644
--- a/libio/iofputs_u.c
+++ b/libio/iofputs_u.c
@@ -29,7 +29,7 @@
#include <string.h>
int
-fputs_unlocked (str, fp)
+__fputs_unlocked (str, fp)
const char *str;
_IO_FILE *fp;
{
@@ -40,4 +40,6 @@ fputs_unlocked (str, fp)
result = 1;
return result;
}
-libc_hidden_def (fputs_unlocked)
+libc_hidden_def (__fputs_unlocked)
+weak_alias (__fputs_unlocked, fputs_unlocked)
+libc_hidden_weak (fputs_unlocked)