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8d26bed1eb
clang generates internal calls for some _chk symbol, so add internal aliases for them, and stub some with rtld-stubbed-symbols to avoid ld.so linker issues. Reviewed-by: Sam James <sam@gentoo.org>
36 lines
1.4 KiB
C
36 lines
1.4 KiB
C
/* Some compiler optimizations may transform loops into memset/memmove
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calls and without proper declaration it may generate PLT calls. */
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#if !defined __ASSEMBLER__ && IS_IN (libc) && defined SHARED \
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&& !defined LIBC_NONSHARED
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asm ("memmove = __GI_memmove");
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asm ("memset = __GI_memset");
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asm ("memcpy = __GI_memcpy");
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/* clang might generate the internal fortfify calls when it is enabled,
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through the buitintin. */
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asm ("__vfprintf_chk = __GI___vfprintf_chk");
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asm ("__vsprintf_chk = __GI___vsprintf_chk");
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asm ("__vsyslog_chk = __GI___vsyslog_chk");
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asm ("__memcpy_chk = __GI___memcpy_chk");
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asm ("__memmove_chk = __GI___memmove_chk");
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asm ("__memset_chk = __GI___memset_chk");
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asm ("__mempcpy_chk = __GI___mempcpy_chk");
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asm ("__stpcpy_chk = __GI___stpcpy_chk");
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asm ("__strcpy_chk = __GI___strcpy_chk");
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asm ("strcpy = __GI_strcpy");
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asm ("strncpy = __GI_strncpy");
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asm ("strcat = __GI_strcat");
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/* Some targets do not use __stack_chk_fail_local. In libc.so,
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redirect __stack_chk_fail to a hidden reference
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__stack_chk_fail_local, to avoid the PLT reference.
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__stack_chk_fail itself is a global symbol, exported from libc.so,
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and cannot be made hidden. */
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# if IS_IN (libc) && defined SHARED \
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&& defined STACK_PROTECTOR_LEVEL && STACK_PROTECTOR_LEVEL > 0
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asm (".hidden __stack_chk_fail_local\n"
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"__stack_chk_fail = __stack_chk_fail_local");
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# endif
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#endif
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