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chk: Add and fix hidden builtin definitions for *_chk
Otherwise on gnu-i686 there are unwanted PLT entries in libc.so when fortification is enabled. Tested for i686-gnu, x86_64-gnu, i686-linux-gnu and x86_64-linux-gnu
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@ -21,3 +21,4 @@
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#define __libc_siglongjmp __longjmp_chk
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#include <setjmp/longjmp.c>
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libc_hidden_def (__longjmp_chk)
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@ -27,3 +27,4 @@ __strncpy_chk (char *s1, const char *s2, size_t n, size_t s1len)
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return strncpy (s1, s2, n);
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}
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libc_hidden_builtin_def (__strncpy_chk)
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@ -11,6 +11,14 @@ extern void __longjmp (__jmp_buf __env, int __val)
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extern void ____longjmp_chk (__jmp_buf __env, int __val)
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__attribute__ ((__noreturn__)) attribute_hidden;
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extern void __longjmp_chk (sigjmp_buf env, int val)
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__attribute__ ((noreturn)) attribute_hidden;
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/* The redirection in the installed header does not work with
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libc_hidden_proto. */
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#define longjmp __longjmp_chk
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#define siglongjmp __longjmp_chk
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libc_hidden_proto (__longjmp_chk)
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/* Internal function to possibly save the current mask of blocked signals
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in ENV, and always set the flag saying whether or not it was saved.
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This is used by the machine-dependent definition of `__sigsetjmp'.
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@ -59,6 +59,8 @@ libc_hidden_proto (__isoc23_strtoull_l)
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libc_hidden_proto. */
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# undef strtol
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# define strtol __isoc23_strtol
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# undef atoi
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# define atoi(nptr) __isoc23_strtol(nptr, NULL, 10)
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# undef strtoul
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# define strtoul __isoc23_strtoul
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# undef strtoll
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@ -214,6 +214,7 @@ libc_hidden_builtin_proto (__memmove_chk)
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libc_hidden_builtin_proto (__mempcpy_chk)
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libc_hidden_builtin_proto (__memset_chk)
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libc_hidden_builtin_proto (__stpcpy_chk)
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libc_hidden_builtin_proto (__strncpy_chk)
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#endif
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@ -19,6 +19,8 @@
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#include <setjmpP.h>
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#include <signal.h>
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#undef longjmp
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#undef siglongjmp
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/* Set the signal mask to the one specified in ENV, and jump
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to the position specified in ENV, causing the setjmp
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