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c61b4d41c9
The pointer guard used for pointer mangling was not initialized for static applications resulting in the security feature being disabled. The pointer guard is now correctly initialized to a random value for static applications. Existing static applications need to be recompiled to take advantage of the fix. The test tst-ptrguard1-static and tst-ptrguard1 add regression coverage to ensure the pointer guards are sufficiently random and initialized to a default value.
21 lines
702 B
C
21 lines
702 B
C
#include <bits/wordsize.h>
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#ifdef __tilegx__
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# if __WORDSIZE == 64
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# define STACK_CHK_GUARD \
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({ uintptr_t x; asm ("addi %0, tp, -16; ld %0, %0" : "=r" (x)); x; })
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# define POINTER_CHK_GUARD \
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({ uintptr_t x; asm ("addi %0, tp, -24; ld %0, %0" : "=r" (x)); x; })
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# else
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# define STACK_CHK_GUARD \
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({ uintptr_t x; asm ("addi %0, tp, -8; ld4s %0, %0" : "=r" (x)); x; })
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# define POINTER_CHK_GUARD \
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({ uintptr_t x; asm ("addi %0, tp, -12; ld4s %0, %0" : "=r" (x)); x; })
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# endif
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#else
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# define STACK_CHK_GUARD \
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({ uintptr_t x; asm ("addi %0, tp, -8; lw %0, %0" : "=r" (x)); x; })
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# define POINTER_CHK_GUARD \
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({ uintptr_t x; asm ("addi %0, tp, -12; lw %0, %0" : "=r" (x)); x; })
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#endif
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