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Avoid array-bounds warning for strncat on i586 (bug 20260)

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This commit is contained in:
Andreas Schwab
2016-06-28 12:54:59 +02:00
parent e402823ef3
commit fea56491c4
2 changed files with 8 additions and 2 deletions
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ChangeLog
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@@ -1,3 +1,10 @@
2016-06-29 Andreas Schwab <schwab@suse.de>
[BZ #20260]
* sysdeps/x86/bits/string.h (__strncat_g) [!__i686__]: Compute the
address before the beginning of the string as an integer to avoid
array-bounds warning.
2016-06-28 Richard Henderson <rth@redhat.com> 2016-06-28 Richard Henderson <rth@redhat.com>
* elf/elf.h (EM_BPF): New. * elf/elf.h (EM_BPF): New.

3
sysdeps/x86/bits/string.h
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@@ -1089,7 +1089,6 @@ __strncat_g (char *__dest, const char __src[], size_t __n)
: "g" (__n), "0" (0), "1" (__tmp), "2" (__src), "3" (0xffffffff) : "g" (__n), "0" (0), "1" (__tmp), "2" (__src), "3" (0xffffffff)
: "memory", "cc"); : "memory", "cc");
# else # else
--__tmp;
__asm__ __volatile__ __asm__ __volatile__
("1:\n\t" ("1:\n\t"
"cmpb $0,1(%1)\n\t" "cmpb $0,1(%1)\n\t"
@@ -1108,7 +1107,7 @@ __strncat_g (char *__dest, const char __src[], size_t __n)
"3:\n\t" "3:\n\t"
"movb $0,(%1)" "movb $0,(%1)"
: "=&q" (__dummy), "=&r" (__tmp), "=&r" (__src), "=&r" (__n) : "=&q" (__dummy), "=&r" (__tmp), "=&r" (__src), "=&r" (__n)
: "1" (__tmp), "2" (__src), "3" (__n) : "1" ((unsigned long) __tmp - 1), "2" (__src), "3" (__n)
: "memory", "cc"); : "memory", "cc");
#endif #endif
return __dest; return __dest;